阅读说明：本技术 车辆热管理控制方法以及装置 (Vehicle thermal management control method and device ) 是由 李强 陈涛 吴皆学 刘晓宇 谭明香 林泽鸿 欧增开 于 2021-09-01 设计创作，主要内容包括：本发明属于汽车领域,公开了一种车辆热管理控制方法以及装置。该方法包括接收到车辆的热管理控制指令时,获取当前环境温度；根据当前环境温度确定当前工况类型；根据当前工况类型选择对应的热管理控制策略；根据热管理控制策略通过热泵系统对电池包和/或乘客舱进行热管理。由于本发明是根据前环境温度确定当前工况类型,进而选择对应的热管理控制策略通过热泵系统对电池包和/或乘客舱进行热管理。相对于现有的采用固定的加热制冷方式对车辆电池包和乘客舱进行热管理的方式,本发明上述方式能够根据当前环境温度选择对应的热管理控制策略并通过热泵系统对电池包和/或乘客舱进行热管理,减少了用户用车成本,提高了用户体验感。(The invention belongs to the field of automobiles, and discloses a vehicle thermal management control method and device. The method comprises the steps of obtaining the current ambient temperature when a thermal management control instruction of a vehicle is received; determining the type of the current working condition according to the current environment temperature; selecting a corresponding thermal management control strategy according to the type of the current working condition; and thermally managing the battery pack and/or the passenger compartment through the heat pump system according to a thermal management control strategy. According to the invention, the current working condition type is determined according to the previous environment temperature, and then a corresponding thermal management control strategy is selected to carry out thermal management on the battery pack and/or the passenger compartment through the heat pump system. Compared with the existing mode of performing heat management on the vehicle battery pack and the passenger compartment by adopting a fixed heating and refrigerating mode, the mode disclosed by the invention can select a corresponding heat management control strategy according to the current ambient temperature and perform heat management on the battery pack and/or the passenger compartment through the heat pump system, so that the vehicle cost of a user is reduced, and the user experience is improved.)

1. A vehicle thermal management control method is characterized by comprising the following steps:

when a thermal management control instruction of a vehicle is received, acquiring the current ambient temperature;

determining the type of the current working condition according to the current environment temperature;

selecting a corresponding thermal management control strategy according to the current working condition type;

and performing thermal management on the battery pack and/or the passenger compartment through the heat pump system according to the thermal management control strategy.

2. The vehicle thermal management control method of claim 1, wherein the step of determining a current operating condition type based on the current ambient temperature comprises:

judging whether the current environment temperature is greater than a preset first temperature threshold value or not;

when the current environment temperature is greater than a preset first temperature threshold value, judging that the current working condition type is a summer working condition;

when the current environment temperature is smaller than or equal to a preset first temperature threshold, judging whether the current environment temperature is larger than a preset second temperature threshold;

and when the current environment temperature is greater than a preset second temperature threshold value, judging that the current working condition type is a spring and autumn working condition.

3. The vehicle thermal management control method according to claim 2, wherein after the step of determining that the current operating condition type is a spring and autumn operating condition when the current ambient temperature is greater than a preset second temperature threshold, the method further comprises:

when the current environment temperature is smaller than or equal to a preset second temperature threshold, judging whether the current environment temperature is larger than a preset third temperature threshold;

when the current environment temperature is greater than a preset third temperature threshold value, judging that the current working condition type is a winter middle-cold working condition;

and when the current environment temperature is less than or equal to the preset third temperature threshold, judging that the current working condition type is an extremely cold working condition in winter.

4. The vehicle thermal management control method according to claim 3, wherein after the step of determining that the current operating condition type is the winter extreme cold operating condition when the current ambient temperature is less than or equal to the preset third temperature threshold, the method further comprises:

judging whether the vehicle is in a charging state at present;

when the vehicle is not in a charging state, starting a heater and controlling a three-way valve at a preset position to be in a preset opening range so as to heat a passenger compartment;

acquiring the temperature of the passenger compartment;

and when the temperature of the passenger compartment is greater than a preset passenger compartment temperature threshold value, controlling the opening degree of the three-way valve at the preset position so as to enable the high-temperature cooling liquid flowing through the three-way valve to be divided, and heating the passenger compartment and the vehicle battery pack through the divided high-temperature cooling liquid respectively.

5. The vehicle thermal management control method according to claim 4, wherein after the step of determining whether the vehicle is currently in a charging state, further comprising:

acquiring a target coolant temperature of coolant flowing through a battery pack, a passenger compartment heating demand and a battery pack temperature, which are fed back by a battery pack controller, when the vehicle is in a charging state;

when the passenger compartment has no heating requirement and the temperature of the battery pack is lower than a preset temperature threshold value, starting a heater and controlling the three-way valve to heat the vehicle battery pack;

acquiring an actual coolant temperature of coolant flowing through a vehicle battery pack, and judging whether the actual coolant temperature is greater than the target coolant temperature;

when the actual cooling liquid temperature is higher than the target cooling liquid temperature, reducing the power of a heater to heat a vehicle battery pack by reasonable high-temperature cooling liquid;

when the passenger compartment has a heating requirement and the temperature of the battery pack is smaller than a preset temperature threshold value, starting a heater and controlling the three-way valve to heat the passenger compartment and the vehicle battery pack;

with the strategy of the preferential assurance battery package heating demand actual coolant temperature is greater than when the target coolant temperature, the adjustment the aperture of three-way valve to make the flow through the high temperature coolant reposition of redundant personnel of three-way valve to the high temperature coolant after shunting heats passenger cabin and vehicle battery package respectively.

6. The vehicle thermal management control method according to claim 3, wherein after the step of determining that the current operating condition type is the winter moderate-cold operating condition when the current ambient temperature is greater than a preset third temperature threshold, the method further comprises:

acquiring the temperature of target cooling liquid flowing through a motor, which is acquired by a motor electric control system;

comparing the current environment temperature with the target cooling liquid temperature to obtain a comparison result;

determining the current heat pump working mode according to the comparison result;

heating the passenger compartment and/or the vehicle battery pack according to the heat pump operating mode.

7. The vehicle thermal management control method according to claim 2, wherein after the step of determining that the current operating condition type is a spring and autumn operating condition when the current ambient temperature is greater than a preset second temperature threshold, the method further comprises:

determining the current heating requirement according to the current environment temperature;

selecting a corresponding heating dehumidification mode according to the heating requirement;

and carrying out thermal management on the passenger compartment and/or the vehicle battery pack according to the heating and dehumidifying mode.

8. The vehicle thermal management control method according to claim 2, wherein after the step of determining that the current operating condition type is a summer operating condition when the current ambient temperature is greater than a preset first temperature threshold, the method further comprises:

judging whether the vehicle is in a charging state at present;

when the vehicle is not in a charging state and the temperature of a vehicle battery pack is smaller than a preset temperature threshold value, starting a compressor and controlling the opening degree of a preset electronic expansion valve to be in the opening degree of the preset electronic expansion valve so as to refrigerate a passenger compartment;

acquiring the temperature of the passenger compartment;

when the passenger compartment temperature is less than or equal to a preset passenger compartment temperature threshold value, adjusting the rotating speed of a compressor to reasonably refrigerate the passenger compartment;

and when the vehicle is not in a charging state and the temperature of the vehicle battery pack is greater than a preset temperature threshold value, starting the compressor and adjusting the opening of the preset electronic expansion valve so as to respectively refrigerate the passenger compartment and the vehicle battery pack.

9. The vehicle thermal management control method according to claim 8, wherein after the step of determining whether the vehicle is currently in a charging state, further comprising:

when the vehicle is in a charging state, acquiring a target coolant temperature of coolant flowing through a battery pack, a passenger compartment refrigeration demand and a vehicle battery pack temperature, which are fed back by a battery pack controller;

when the passenger compartment has no refrigeration requirement and the temperature of the vehicle battery pack is higher than a preset temperature threshold value, starting a compressor and controlling the opening of a preset electronic expansion valve to refrigerate the vehicle battery pack;

when the passenger compartment has a refrigeration requirement and the temperature of the vehicle battery pack is higher than a preset temperature threshold value,

acquiring the temperature of coolant flowing through a vehicle battery pack, and judging whether the temperature of the coolant is less than the target coolant temperature;

when the coolant temperature is less than the target coolant temperature, adjusting an opening degree of the preset electronic expansion valve to distribute more cooling capacity to the passenger compartment to cool the passenger compartment and the vehicle battery pack, respectively.

10. A vehicle thermal management control apparatus characterized by comprising:

the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring the current ambient temperature when a thermal management control instruction of a vehicle is received;

the determining module is used for determining the type of the current working condition according to the current environment temperature;

the selection module is used for selecting a corresponding thermal management control strategy according to the current working condition type;

and the thermal management module is used for carrying out thermal management on the battery pack and/or the passenger compartment through the heat pump system according to the thermal management control strategy.

Technical Field

The invention relates to the technical field of automobiles, in particular to a vehicle thermal management control method and device.

Background

Comfort is often an important indicator of whether a vehicle is excellent or not. Although each vehicle has its own advantages, comfort is a point at which any vehicle is considered to be very important, and thermal management control on the vehicle is a point at which vehicle comfort is a measure and is essential. Especially of the domestic type. The good thermal management control system can greatly improve the riding experience of a user and save the vehicle cost of the user.

The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.

Disclosure of Invention

The invention mainly aims to provide a vehicle thermal management control method and device, and aims to solve the technical problems of poor user experience and high vehicle cost caused by only adopting a fixed heating and cooling mode in the prior art.

In order to achieve the above object, the present invention provides a vehicle thermal management control method, including the steps of:

when a thermal management control instruction of a vehicle is received, acquiring the current ambient temperature;

determining the type of the current working condition according to the current environment temperature;

selecting a corresponding thermal management control strategy according to the current working condition type;

and performing thermal management on the battery pack and/or the passenger compartment through the heat pump system according to the thermal management control strategy.

Optionally, the step of determining the current operating condition type according to the current ambient temperature includes:

judging whether the current environment temperature is greater than a preset first temperature threshold value or not;

when the current environment temperature is greater than a preset first temperature threshold value, judging that the current working condition type is a summer working condition;

when the current environment temperature is smaller than or equal to a preset first temperature threshold, judging whether the current environment temperature is larger than a preset second temperature threshold;

and when the current environment temperature is greater than a preset second temperature threshold value, judging that the current working condition type is a spring and autumn working condition.

Optionally, after the step of determining that the current operating condition type is the spring and autumn operating condition when the current ambient temperature is greater than the preset second temperature threshold, the method further includes:

when the current environment temperature is smaller than or equal to a preset second temperature threshold, judging whether the current environment temperature is larger than a preset third temperature threshold;

when the current environment temperature is greater than a preset third temperature threshold value, judging that the current working condition type is a winter middle-cold working condition;

and when the current environment temperature is less than or equal to the preset third temperature threshold, judging that the current working condition type is an extremely cold working condition in winter.

Optionally, after the step of determining that the current operating condition type is the winter extremely-cold operating condition when the current ambient temperature is less than or equal to the preset third temperature threshold, the method further includes:

judging whether the vehicle is in a charging state at present;

when the vehicle is not in a charging state, starting a heater and controlling a three-way valve at a preset position to be in a preset opening range so as to heat a passenger compartment;

acquiring the temperature of the passenger compartment;

and when the temperature of the passenger compartment is greater than a preset passenger compartment temperature threshold value, controlling the opening degree of the three-way valve at the preset position so as to enable the high-temperature cooling liquid flowing through the three-way valve to be divided, and heating the passenger compartment and the vehicle battery pack through the divided high-temperature cooling liquid respectively.

Optionally, after the step of determining whether the vehicle is currently in a charging state, the method further includes:

acquiring a target coolant temperature of coolant flowing through a battery pack, a passenger compartment heating demand and a battery pack temperature, which are fed back by a battery pack controller, when the vehicle is in a charging state;

when the passenger compartment has no heating requirement and the temperature of the battery pack is lower than a preset temperature threshold value, starting a heater and controlling the three-way valve to heat the vehicle battery pack;

acquiring an actual coolant temperature of coolant flowing through a vehicle battery pack, and judging whether the actual coolant temperature is greater than the target coolant temperature;

when the actual cooling liquid temperature is higher than the target cooling liquid temperature, reducing the power of a heater to heat a vehicle battery pack by reasonable high-temperature cooling liquid;

when the passenger compartment has a heating requirement and the temperature of the battery pack is smaller than a preset temperature threshold value, starting a heater and controlling the three-way valve to heat the passenger compartment and the vehicle battery pack;

with the strategy of the preferential assurance battery package heating demand actual coolant temperature is greater than when the target coolant temperature, the adjustment the aperture of three-way valve to make the flow through the high temperature coolant reposition of redundant personnel of three-way valve to the high temperature coolant after shunting heats passenger cabin and vehicle battery package respectively.

Optionally, after the step of determining that the current operating condition type is the winter middle-cold operating condition when the current ambient temperature is greater than the preset third temperature threshold, the method further includes:

acquiring the temperature of target cooling liquid flowing through a motor, which is acquired by a motor electric control system;

comparing the current environment temperature with the target cooling liquid temperature to obtain a comparison result;

determining the current heat pump working mode according to the comparison result;

heating the passenger compartment and/or the vehicle battery pack according to the heat pump operating mode.

Optionally, after the step of determining that the current operating condition type is the spring and autumn operating condition when the current ambient temperature is greater than the preset second temperature threshold, the method further includes:

determining the current heating requirement according to the current environment temperature;

selecting a corresponding heating dehumidification mode according to the heating requirement;

and carrying out thermal management on the passenger compartment and/or the vehicle battery pack according to the heating and dehumidifying mode.

Optionally, after the step of determining that the current working condition type is the summer working condition when the current ambient temperature is greater than the preset first temperature threshold, the method further includes:

judging whether the vehicle is in a charging state at present;

when the vehicle is not in a charging state and the temperature of a vehicle battery pack is smaller than a preset temperature threshold value, starting a compressor and controlling the opening degree of a preset electronic expansion valve to be in the opening degree of the preset electronic expansion valve so as to refrigerate a passenger compartment;

acquiring the temperature of the passenger compartment;

when the passenger compartment temperature is less than or equal to a preset passenger compartment temperature threshold value, adjusting the rotating speed of a compressor to reasonably refrigerate the passenger compartment;

and when the vehicle is not in a charging state and the temperature of the vehicle battery pack is greater than a preset temperature threshold value, starting the compressor and adjusting the opening of the preset electronic expansion valve so as to respectively refrigerate the passenger compartment and the vehicle battery pack.

Optionally, after the step of determining whether the vehicle is currently in a charging state, the method further includes:

when the vehicle is in a charging state, acquiring a target coolant temperature of coolant flowing through a battery pack, a passenger compartment refrigeration demand and a vehicle battery pack temperature, which are fed back by a battery pack controller;

when the passenger compartment has no refrigeration requirement and the temperature of the vehicle battery pack is higher than a preset temperature threshold value, starting a compressor and controlling the opening of a preset electronic expansion valve to refrigerate the vehicle battery pack;

when the passenger compartment has a refrigeration requirement and the temperature of the vehicle battery pack is higher than a preset temperature threshold value,

acquiring the temperature of coolant flowing through a vehicle battery pack, and judging whether the temperature of the coolant is less than the target coolant temperature;

when the coolant temperature is less than the target coolant temperature, adjusting an opening degree of the preset electronic expansion valve to distribute more cooling capacity to the passenger compartment to cool the passenger compartment and the vehicle battery pack, respectively.

Further, to achieve the above object, the present invention also provides a vehicle thermal management control apparatus including:

the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring the current ambient temperature when a thermal management control instruction of a vehicle is received;

the determining module is used for determining the type of the current working condition according to the current environment temperature;

the selection module is used for selecting a corresponding thermal management control strategy according to the current working condition type;

and the thermal management module is used for carrying out thermal management on the battery pack and/or the passenger compartment through the heat pump system according to the thermal management control strategy.

Further, to achieve the above object, the present invention also proposes a vehicle thermal management control apparatus including: a memory, a processor, and a vehicle thermal management control program stored on the memory and executable on the processor, the vehicle thermal management control program configured to implement the steps of the vehicle thermal management control method as described above.

In addition, in order to achieve the above object, the present invention further provides a storage medium, wherein the storage medium stores a vehicle thermal management control program, and the vehicle thermal management control program realizes the steps of the vehicle thermal management control method as described above when being executed by a processor.

The method comprises the steps of acquiring the current ambient temperature when a thermal management control instruction of a vehicle is received; determining the type of the current working condition according to the current environment temperature; selecting a corresponding thermal management control strategy according to the current working condition type; and performing thermal management on the battery pack and/or the passenger compartment through the heat pump system according to the thermal management control strategy. According to the invention, the current working condition type is determined according to the previous environment temperature, the corresponding thermal management control strategy is selected according to the current working condition type, and the thermal management is carried out on the battery pack and/or the passenger compartment through the heat pump system according to the thermal management control strategy. Compared with the existing mode of performing heat management on the vehicle battery pack and the passenger compartment by adopting a fixed heating and refrigerating mode, the mode disclosed by the invention can select a corresponding heat management control strategy according to the current ambient temperature and perform heat management on the battery pack and/or the passenger compartment through the heat pump system, so that the vehicle cost of a user is reduced, and the user experience is improved.

Drawings

FIG. 1 is a schematic structural diagram of a vehicle thermal management control device of a hardware operating environment according to an embodiment of the invention;

FIG. 2 is a schematic flow chart diagram of a first embodiment of a vehicle thermal management control method of the present invention;

FIG. 3 is a schematic flow chart diagram of a second embodiment of a vehicle thermal management control method of the present invention;

FIG. 4 is a schematic structural diagram of a vehicle thermal management control method according to the present invention;

FIG. 5 is a schematic flow chart diagram illustrating a vehicle thermal management control method according to a third embodiment of the present invention;

FIG. 6 is a schematic flow chart diagram illustrating a fourth embodiment of a vehicle thermal management control method in accordance with the present invention;

fig. 7 is a block diagram showing the configuration of the first embodiment of the vehicular thermal management control apparatus of the invention.

Reference numerals	Name (R)	Reference numerals	Name (R)
				1	Water pump 1	16	Compressor 16
2	Electric control system of motor	17	Stop valve 17
				3	Three-way valve 3	18	Electronic expansion valve 18
4	Heat exchanger 4	19	Shut-off valve 19
				5	Heat exchanger 5	20	Condenser 20
6	Water pump 6	21	Stop valve 21
				7	Three-way valve 7	22	Electronic expansion valve 22
8	Warm air core body 8	23	Evaporator 23
				9	Heat exchanger 9	24	Electronic expansion valve 24
10	Three-way valve 10	25	Check valve 25
				11	Heater WPTC	26	Fan 26
12	Water pump 12	27	Fan 27
				13	Battery pack 13
14	Heat exchanger 14
				15	Heat exchanger 15

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle thermal management control device in a hardware operating environment according to an embodiment of the present invention.

As shown in fig. 1, the vehicle thermal management control apparatus may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a Wireless interface (e.g., a Wireless-Fidelity (WI-FI) interface). The Memory 1005 may be a Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.

Those skilled in the art will appreciate that the configuration shown in FIG. 1 does not constitute a limitation of a vehicle thermal management control apparatus and may include more or fewer components than shown, or some components in combination, or a different arrangement of components.

As shown in fig. 1, a memory 1005, which is one type of storage medium, may include therein an operating system, a network communication module, a user interface module, and a vehicle thermal management control program.

In the vehicle thermal management control apparatus shown in fig. 1, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the vehicle thermal management control device according to the present invention may be provided in the vehicle thermal management control device, and the vehicle thermal management control device invokes a vehicle thermal management control program stored in the memory 1005 through the processor 1001 and executes the vehicle thermal management control method according to the embodiment of the present invention.

Based on the vehicle thermal management control device, an embodiment of the invention provides a vehicle thermal management control method, and referring to fig. 2, fig. 2 is a flowchart illustrating a first embodiment of the vehicle thermal management control method.

In this embodiment, the vehicle thermal management control method includes the steps of:

step S10: and when a thermal management control instruction of the vehicle is received, acquiring the current ambient temperature.

It should be noted that the execution subject of the embodiment may be a computing service device with data processing, network communication and program running functions, such as a mobile phone, a tablet computer, a personal computer, etc., or an electronic device or a vehicle thermal management control system capable of implementing the above functions. The present embodiment and the following embodiments will be described below by taking the vehicle thermal management control system as an example.

It should be noted that the thermal management control command may be a command triggered by a user to start thermal management of a vehicle, may be a command to control the vehicle to heat a vehicle battery pack and/or a passenger compartment or cool the vehicle battery pack and/or the passenger compartment, and may include a heating temperature or a cooling temperature set by the user, or may be a heating or cooling command triggered by the user through a remote control device associated with the vehicle, which is not limited herein. The current ambient temperature may be a temperature in an environment in which the current vehicle is located. For example, the current ambient temperature in summer is typically greater than 20 degrees celsius, and the current ambient temperature in winter is typically less than 5 degrees celsius.

In specific implementation, when a thermal management control instruction triggered by a user is received, the vehicle thermal management control system acquires the current ambient temperature according to a temperature sensor arranged on a vehicle body.

Step S20: and determining the type of the current working condition according to the current environment temperature.

It should be noted that the current operating condition type may be an operating condition in which the vehicle is determined according to the current ambient temperature. For example, when the current temperature is greater than 25 degrees celsius, it may be determined that the current vehicle is in a summer condition, and when the current temperature is less than 5 degrees celsius, it may be determined that the current vehicle is in a winter condition.

Further, in order to reduce the vehicle cost of the user, the step S20 may include:

step S201: judging whether the current environment temperature is greater than a preset first temperature threshold value or not;

step S202: when the current environment temperature is greater than a preset first temperature threshold value, judging that the current working condition type is a summer working condition;

step S203: when the current environment temperature is smaller than or equal to a preset first temperature threshold, judging whether the current environment temperature is larger than a preset second temperature threshold;

step S204: and when the current environment temperature is greater than a preset second temperature threshold value, judging that the current working condition type is a spring and autumn working condition.

It should be noted that, the preset first temperature threshold and the preset second temperature threshold may be temperatures set by a user in a self-defined manner, and are used for dividing the operating condition types of the vehicle according to the current ambient temperature, for example, the preset first temperature threshold may be set to 25 degrees celsius, and the preset second temperature threshold may be set to 5 degrees celsius, at this time, when the actual ambient temperature is greater than 25 degrees celsius, it may be determined that the vehicle is currently in a summer operating condition, and when the actual ambient temperature is less than or equal to 25 degrees celsius but greater than 5 degrees celsius, it may be determined that the vehicle is currently in a spring and autumn operating condition. Obviously, the spring and autumn conditions and the summer conditions do not have the same cooling requirements for the vehicle. For example, the temperature set by the user is 20 degrees celsius, and in the summer, the thermal management control system of the vehicle is started to control the temperature of the passenger compartment at about 20 degrees celsius and in the spring and autumn, the temperature of the passenger compartment at about 20 degrees celsius, and the work performed by the thermal management control system of the vehicle is obviously different, that is, the refrigeration requirement of the user is greater in the summer than in the spring and autumn, therefore, the embodiment distinguishes the type of the working condition in which the vehicle is located, and in different working conditions, the thermal management control system of the vehicle adopts different control logics to respond to the thermal management requirement of the user.

Further, in order to reduce the vehicle cost of the user, after the step S204, the method further includes:

step S205: when the current environment temperature is smaller than or equal to a preset second temperature threshold, judging whether the current environment temperature is larger than a preset third temperature threshold;

step S206: when the current environment temperature is greater than a preset third temperature threshold value, judging that the current working condition type is a winter middle-cold working condition;

step S207: and when the current environment temperature is less than or equal to the preset third temperature threshold, judging that the current working condition type is an extremely cold working condition in winter.

It should be noted that the preset third temperature threshold may be a temperature set by a user in a self-defined manner, and is used to divide the operating condition types of the vehicle according to the current environmental temperature, for example, the preset third temperature threshold may be set to-15 degrees celsius, and at this time, when the actual environmental temperature is less than or equal to 5 degrees celsius but greater than-15 degrees celsius, it may be determined that the vehicle is currently in the winter middle-cold operating condition. And when the actual environment temperature is less than or equal to-15 ℃, judging that the current working condition is extremely cold in winter.

In a specific implementation, for example, when the current ambient temperature is less than or equal to 5 degrees celsius, the vehicle thermal management control system determines whether the current ambient temperature is greater than-15 degrees celsius; when the current environment temperature is higher than minus 15 ℃, judging that the current working condition type is a winter middle-cold working condition; and when the current environment temperature is less than or equal to minus 15 ℃, judging that the current working condition type is an extremely cold working condition in winter.

Step S30: and selecting a corresponding thermal management control strategy according to the current working condition type.

It should be noted that the thermal management control strategy may be a control logic in response to a thermal management control instruction of a user, and the requirements for heating or cooling are different under different working conditions, so that by adopting different control logics under different working conditions, the heating capability of the vehicle can be improved when the heating requirement is large, that is, when the difference between the ambient temperature and the temperature set by the user is large, so that the temperature in the vehicle can reach the temperature set by the user as quickly as possible, and further the experience of the user can be improved.

Step S40: and performing thermal management on the battery pack and/or the passenger compartment through the heat pump system according to the thermal management control strategy.

It should be noted that, the thermal management of the battery pack and/or the passenger compartment by the heat pump system according to the thermal management control strategy may be performed by controlling preset opening degrees of a three-way valve, a heater PTC, a compressor, and various valves to adjust the flow rate of high-temperature coolant or refrigerant flowing through the passenger compartment and/or the vehicle battery pack, so as to dynamically adjust the vehicle thermal management control logic according to the current working condition type.

The method comprises the steps of acquiring the current ambient temperature when a thermal management control instruction of a vehicle is received; determining the type of the current working condition according to the current environment temperature; selecting a corresponding thermal management control strategy according to the current working condition type; and performing thermal management on the battery pack and/or the passenger compartment through the heat pump system according to the thermal management control strategy. According to the embodiment, the current working condition type is determined according to the previous environment temperature, the corresponding thermal management control strategy is selected according to the current working condition type, and the thermal management is performed on the battery pack and/or the passenger compartment through the heat pump system according to the thermal management control strategy. Compared with the existing mode of performing heat management on the vehicle battery pack and the passenger compartment by adopting a fixed heating and refrigerating mode, the mode can select the corresponding heat management control strategy according to the current environment temperature and perform heat management on the battery pack and/or the passenger compartment through the heat pump system, so that the vehicle cost of a user is reduced, and the user experience is improved.

Referring to fig. 3, fig. 3 is a flowchart illustrating a vehicle thermal management control method according to a second embodiment of the present invention.

Based on the first embodiment, in this embodiment, after step S207, the method further includes:

step S2071: and judging whether the vehicle is in a charging state at present.

It should be noted that the vehicle in this embodiment may be a new energy vehicle, and the new energy vehicle may be a vehicle powered by a power battery. The state of charge may be whether the new energy vehicle is charging a power battery.

Step S2072: when the vehicle is not in a charging state, a heater is started and a three-way valve at a preset position is controlled to be in a preset opening range to heat a passenger compartment.

It should be noted that the heater may be a WPTC heater in a vehicle thermal management control system. The preset position may be a preset installation position of the three-way valve.

In specific implementation, referring to fig. 4, fig. 4 is a structural schematic view of a vehicle thermal management control method according to the present invention, where starting a heater and controlling a three-way valve at a preset position to be in a preset opening range to heat a passenger compartment may refer to fig. 4, starting a heater 11 in fig. 4 to heat a coolant flowing through a heat pump cycle system and controlling a water pump 6 to operate, a warm air core 8 to heat air blown by a blower to heat the passenger compartment, and controlling the opening of the three-way valves 7 and 10 so that the heated high-temperature coolant does not pass through a heat exchanger 9 and a heat exchanger 15, thereby avoiding unnecessary energy waste due to heat exchange. The control flow can be used not only to preferentially heat the passenger compartment, but also to heat the passenger compartment individually when the user instructs to heat the passenger compartment individually.

Step S2073: passenger compartment temperature is obtained.

It should be noted that the passenger compartment temperature may be a temperature within a passenger compartment of the vehicle.

Step S2074: and when the temperature of the passenger compartment is greater than a preset passenger compartment temperature threshold value, controlling the opening degree of the three-way valve at the preset position so as to enable the high-temperature cooling liquid flowing through the three-way valve to be divided, and heating the passenger compartment and the vehicle battery pack through the divided high-temperature cooling liquid respectively.

It should be noted that the preset passenger compartment temperature threshold may be a preset temperature value that makes the user feel most comfortable, or may be a target temperature value set by the user in the heating instruction of the user.

Further, in order to reasonably heat the battery pack and the passenger compartment of the vehicle, the temperature of the passenger compartment and the temperature of the battery pack of the vehicle can be acquired; when the temperature of the vehicle battery pack is lower than a preset temperature threshold value (for example, 20 degrees), and meanwhile, when the temperature of the passenger compartment is higher than the preset temperature threshold value of the passenger compartment, the opening degree of the three-way valve at the preset position can be controlled according to a strategy of preferentially ensuring the heating of the passenger compartment, so that the high-temperature cooling liquid flowing through the three-way valve is reasonably distributed, under the condition of ensuring the heat requirement of the passenger compartment, redundant heat is redistributed to heat the battery, and the passenger compartment and the vehicle battery pack are respectively heated through the reasonably distributed high-temperature cooling liquid.

In specific implementation, when the passenger compartment temperature is greater than the preset passenger compartment temperature threshold, the heating of the battery pack may be started, at this time, the work flow may be, referring to fig. 4, the coolant is heated by the heater 11, the water pumps 6 and 12 operate, the warm air core 8 heats the air blown out by the blower, the high-temperature coolant and the battery pack coolant complete heat exchange in the heat exchanger 15, the heat requirements of the passenger compartment and the battery pack are distributed by controlling the opening degree of the three-way valve 7, and the three-way valve 10 is controlled so as not to pass through the heat exchanger 9, thereby avoiding unnecessary energy waste caused by heat exchange.

Further, in order to improve the experience of the user, after the step S2071, the method further includes: acquiring a target coolant temperature of coolant flowing through a battery pack, a passenger compartment heating demand and a battery pack temperature, which are fed back by a battery pack controller, when the vehicle is in a charging state; when the passenger compartment has no heating requirement and the temperature of the battery pack is lower than a preset temperature threshold value, starting a heater and controlling the three-way valve to heat the vehicle battery pack; acquiring an actual coolant temperature of coolant flowing through a vehicle battery pack, and judging whether the actual coolant temperature is greater than the target coolant temperature; when the actual cooling liquid temperature is higher than the target cooling liquid temperature, reducing the power of a heater to heat a vehicle battery pack by reasonable high-temperature cooling liquid; when the passenger compartment has a heating requirement and the temperature of the battery pack is smaller than a preset temperature threshold value, starting a heater and controlling the three-way valve to heat the passenger compartment and the vehicle battery pack; with the strategy of the preferential assurance battery package heating demand actual coolant temperature is greater than when the target coolant temperature, the adjustment the aperture of three-way valve to make the flow through the high temperature coolant reposition of redundant personnel of three-way valve to the high temperature coolant after shunting heats passenger cabin and vehicle battery package respectively.

It should be noted that the target coolant temperature may be a temperature of the coolant flowing through the battery pack when the battery pack controller heats the battery pack, which is determined based on the actual temperature of the battery pack. The passenger compartment heating demand may be whether a user turns on a vehicle air conditioner. Heating of the battery pack may be performed only when the user does not currently have a temperature control requirement for the passenger compartment. And when the actual cooling liquid temperature is greater than the target cooling liquid temperature, the power of the heater is reduced, and energy is saved.

It should be understood that when the vehicle is in a charging state, whether the vehicle has a heating demand needs to be judged, when the vehicle does not have the heating demand, the temperature of the battery pack needs to be guaranteed preferentially, at the moment, the battery pack is heated preferentially, the heating process can be that the cooling liquid is heated by the heater 11, the water pumps 6 and 12 are operated, the heat exchange of the high-temperature cooling liquid and the low-temperature cooling liquid of the battery pack is completed by the heat exchanger 15, the opening degree of the three-way valve 10 is controlled, so that the heat exchange is avoided not to cause unnecessary energy waste through the heat exchanger 9. The control flow can be used not only to preferentially heat the battery pack, but also to heat the battery pack individually when the user instructs to heat the battery pack individually. When the actual coolant temperature flowing through the battery pack is greater than the target coolant temperature, the high-temperature coolant can be branched at the three-way valve 7 while heating the passenger compartment and the vehicle battery pack by adjusting the opening degree of the three-way valve 7.

When the current environment temperature is less than or equal to the preset third temperature threshold, judging whether the vehicle is currently in a charging state or not after judging that the current working condition type is an extremely cold working condition in winter; when the vehicle is not in a charging state, starting a heater and controlling a three-way valve at a preset position to be in a preset opening range so as to heat a passenger compartment; acquiring the temperature of the passenger compartment; and when the temperature of the passenger compartment is greater than a preset passenger compartment temperature threshold value, controlling the opening degree of the three-way valve at the preset position so as to enable the high-temperature cooling liquid flowing through the three-way valve to be divided, and heating the passenger compartment and the vehicle battery pack through the divided high-temperature cooling liquid respectively. The embodiment starts the heater and controls the three-way valve at the preset position to be in the preset opening range to heat the passenger compartment when the vehicle is in the extremely cold working condition in winter and the vehicle is not in the charging state. And when the temperature of the passenger compartment is greater than a preset passenger compartment temperature threshold value, controlling the opening degree of the three-way valve at the preset position so as to enable the high-temperature cooling liquid flowing through the three-way valve to be divided, and heating the passenger compartment and the vehicle battery pack through the divided high-temperature cooling liquid respectively. Make when the vehicle is in charged state, the heating demand of priority assurance passenger cabin, and then heat vehicle battery package, promoted user experience and felt.

Referring to fig. 5, fig. 5 is a flowchart illustrating a vehicle thermal management control method according to a third embodiment of the present invention.

Based on the foregoing embodiments, in this embodiment, after step S206, the method further includes:

step S2061: and acquiring the target temperature of the cooling liquid flowing through the motor, which is acquired by the motor electric control system.

It should be noted that the target coolant temperature may be a temperature of coolant flowing through the motor, which is collected by the motor electronic control system. Under the working condition of middle and cold winter, two heat sources are provided, one is that the heater 11 heats the cooling liquid, and the other is that the heat pump system is operated, and the heat exchange is completed at the heat exchanger 9 through the high-temperature cooling liquid.

In particular implementation, referring to fig. 4, the motor electronic control system 2 collects the temperature of the coolant flowing through the motor.

Step S2062: and comparing the current environment temperature with the target cooling liquid temperature to obtain a comparison result.

It should be noted that the comparison result may be a difference between the target coolant temperature and the current ambient temperature.

Step S2063: and determining the current heat pump working mode according to the comparison result.

It should be noted that the heat pump operation mode may be an operation mode of the heat pump system, and the operation states of each component in the heat pump system may be different in different operation modes. For example, the heat pump operation modes may be three of: a single external cooling heat absorption heat pump mode, an external cooling heat absorption and waste heat recovery heat pump mode and a single waste heat recovery heat pump mode. The determining of the current heat pump operation mode according to the comparison result may be a heat pump operation flow in a single external cooling heat absorption heat pump mode when the difference between the target coolant temperature and the current ambient temperature in the comparison result is close, that is, smaller than a preset first threshold. And when the difference value between the target cooling liquid temperature and the current environment temperature in the comparison result is greater than a preset second threshold value, the heat pump working process of the single waste heat recovery heat pump mode can be adopted. And when the difference value between the target cooling liquid temperature and the current environment temperature in the comparison result is greater than the first threshold value and less than or equal to a preset second threshold value, the heat pump working process of an external cooling heat absorption and waste heat recovery heat pump mode can be adopted. The first threshold and the second threshold may be preset temperature thresholds for determining the operation mode of the heat pump, and may be adaptively adjusted according to actual conditions, and the embodiment is not limited herein.

In a specific implementation, the vehicle thermal management control system obtains a target coolant temperature of the motor flowing through collected by the motor electronic control system, compares the current ambient temperature with the target coolant temperature, and determines that the target coolant temperature is close to the ambient temperature, that is, the difference is smaller than a preset first threshold, which may be that the difference is smaller than or equal to 2 ℃. The single external cooling heat absorption mode heat pump mode works by, referring to fig. 4, operating the compressor 16 without exchanging heat at the heat exchanger 4, starting the electronic expansion valve 18, and turning off the valve 21, forming a complete air conditioning cycle in which the heat exchanger 9 acts as a condenser and the heat exchanger 20 acts as an evaporator in the cycle. When the difference between the target coolant temperature and the current ambient temperature is greater than the first threshold and is less than or equal to the preset second threshold, the difference may be greater than the ambient temperature by 5 degrees celsius and is less than or equal to 10 degrees celsius, an external cooling heat absorption and waste heat recovery heat pump working mode is adopted, and the working process may be: the compressor 16 is operated, the electronic expansion valve 18 and the stop valve 21 are started to form a complete air conditioning cycle, wherein the heat exchanger 9 serves as a condenser, the heat exchanger 20 serves as an evaporator in the cycle, meanwhile, heat exchange is carried out at the heat exchanger 4, the water pump 1 is operated, and under the working condition of driving, the motor and the electronic control system 2 generate heat and can heat low-temperature refrigerant. When the difference between the target cooling liquid temperature and the current environment temperature is greater than a preset second threshold, the difference can be greater than the environment temperature by 10 degrees centigrade, and the single waste heat recovery heat pump mode is adopted to work, and the process comprises the following steps: alternatively, the fan in front of the heat exchanger 20 may be turned off, and the remaining operation modes may be the same as those of the external cooling heat absorption and waste heat recovery heat pump.

Step S2064: heating the passenger compartment and/or the vehicle battery pack according to the heat pump operating mode.

It should be noted that, the heating of the passenger compartment and/or the vehicle battery pack according to the heat pump operation mode may be to select the operation mode of the heat pump according to the current ambient temperature and the target coolant temperature, and determine the heating target according to the heating instruction of the user, i.e. to heat the passenger compartment or the battery pack separately or to heat the passenger compartment and the battery pack simultaneously. And heating the heating target through the current heat pump working mode.

In a specific implementation, when heating a single passenger compartment, the work flow may be that the heat pump system and the heater WPTC11 are operated simultaneously, the opening degree of the three-way valve 7 is controlled so as not to pass through the heat exchanger 15, and the opening degree of the three-way valve 10 is controlled so as to exchange heat between the coolant and the refrigerant in the heat exchanger 9, meanwhile, for energy saving, the heater 11 may be only involved in the initial heating stage, and the steady state may be maintained by the heat pump system for the rest of time. That is, when the temperature of the passenger compartment reaches a preset temperature threshold or a target temperature set by a user, the heater 11 is turned off and the heat pump system maintains a steady state. The operation mode of the heat pump system may be determined according to the above-mentioned manner of determining the operation mode of the heat pump system, and the embodiment is not limited herein. When the single battery pack is used for heating, the working process can be that the heat pump system and the heater 11 work simultaneously, the water pumps 6 and 12 operate, the opening degree of the three-way valve 7 is controlled, so that the high-temperature cooling liquid and the battery pack low-temperature cooling liquid finish heat exchange in the heat exchanger 15, and the opening degree of the three-way valve 10 is controlled, so that the high-temperature cooling liquid and the refrigerant realize heat exchange in the heat exchanger 9; in order to save energy, if the vehicle is charged, the rise in the battery temperature is preferentially ensured, the heater is not restricted to participate, and the heater may be turned off when the temperature of the coolant flowing through the battery pack reaches the target coolant temperature of the coolant flowing through the battery pack, which is fed back by the battery pack controller. If the vehicle is not in a charging state, the heating power consumption is prioritized, the heater reduces the on-time under an unnecessary condition, the heat pump is mainly used for heating, so as to save energy, and the heater is not started when the heat pump system can maintain a steady state, namely, the temperature of the battery pack is maintained within a preset temperature range of the battery pack, or the temperature of the cooling liquid flowing through the battery pack can be made to reach the target cooling liquid temperature of the cooling liquid flowing through the battery pack fed back by the battery pack controller within a preset time. When the passenger compartment and the battery pack are simultaneously heated, the workflow may be: the heat pump system and the heater 11 work simultaneously, the water pumps 6 and 12 operate, the warm air core 23 heats air blown out by the blower, high-temperature cooling liquid and battery pack low-temperature cooling liquid complete heat exchange in the heat exchanger 15, the heat requirements of a passenger compartment and a battery pack are distributed by controlling the opening degree of the three-way valve 7, and the three-way valve 10 is controlled to ensure that the high-temperature cooling liquid and refrigerant realize heat exchange in the heat exchanger 9; the opening degree of the three-way valve 7 can be controlled through a certain strategy algorithm to heat the passenger compartment and the battery pack at the same time, the opening degree of the three-way valve 7 can be adjusted when either one of the passenger compartment and the battery pack reaches a stable state but the other one does not reach the stable state, so that both the passenger compartment and the battery pack reach the stable state as soon as possible, or the opening degree of the three-way valve is adjusted when the heating requirement of one of the passenger compartment and the battery pack is larger, namely more energy is needed when the stable state is reached, so that more high-temperature cooling liquid flowing through the three-way valve is deviated to the side with larger heating requirement. The method can also judge whether the vehicle belongs to a charging state, if the vehicle is not in the charging state, heating of the passenger compartment is preferentially guaranteed, a three-way valve control strategy ensures that enough heat is distributed to the passenger compartment, the rest heat is distributed to the battery pack, energy conservation is preferentially carried out, the working mode of the heat pump system is controlled to be a mode capable of providing more heat as far as possible, and the heater is not started under the condition that heating requirements can be guaranteed. If the vehicle is in a charging state, the battery pack is preferentially heated, the opening degree of the three-way valve is controlled, and after the heating requirement of the battery pack is responded, namely after the battery pack reaches a steady state, the residual heat is distributed to the passenger compartment. Meanwhile, in order to ensure the heating of the battery pack, the participation of the heater is not limited, namely the heater can be started according to the actual situation, namely the heater is started when the temperature of the battery pack cannot be well ensured to rise by the heat pump system.

The method comprises the steps of acquiring a target cooling liquid temperature flowing through a motor, which is acquired by a motor electric control system; comparing the current environment temperature with the target cooling liquid temperature to obtain a comparison result; determining the current heat pump working mode according to the comparison result; heating the passenger compartment and/or the vehicle battery pack according to the heat pump operating mode. This embodiment is through the target coolant temperature of gathering the motor of flowing through, confirms current heat pump mode according to target coolant temperature and current ambient temperature, can retrieve the heat that the motor during operation produced, further saving user's cost of using a car.

Referring to fig. 6, fig. 6 is a flowchart illustrating a vehicle thermal management control method according to a fourth embodiment of the present invention.

Based on the foregoing embodiments, in this embodiment, after the step S204, the method further includes:

step S2041: and determining the current heating requirement according to the current environment temperature.

It should be noted that the heating requirement may be the amount of energy to be consumed in thermal management determined according to the current ambient temperature.

It should be understood that under spring and autumn conditions, the ambient temperature is typically 5 degrees celsius to 25 degrees celsius, and the requirements of heating, cooling and/or dehumidification need to be considered, so the control logic for the states of the components in the heat pump cycle system needs to be dynamically adjusted according to the current heating requirement.

Step S2042: and selecting a corresponding heating and dehumidifying mode according to the heating requirement.

It should be noted that the heating and dehumidifying modes in this embodiment include three types: the heating mode I, the heating mode II and the heating mode III. The first heating mode comprises a double evaporator and a single condenser, the second heating mode comprises a single evaporator and a single condenser, and the third heating mode comprises a single evaporator and a double condenser, so that the heating amounts of the three heating modes are compared: the first heating mode is larger than the second heating mode than the third heating mode, so that the first heating mode is generally operated when the heating demand is large, and the third heating mode is operated when the passenger compartment and/or the battery pack reach a steady state and only needs to be maintained when the heating demand is relatively small. The control flow can be as follows: the compressor 16 is operated, the electronic expansion valve 18 is started, and the shut-off valve 21 is closed, forming a first complete air conditioning cycle, in which the heat exchanger 9 acts as a condenser and the heat exchanger 20 acts as an evaporator in the cycle. At the same time, the electronic expansion valve 22, and the shut-off valve 19, are actuated to form a second complete air conditioning cycle in which the heat exchanger 9 acts as a condenser and the heat exchanger 23 acts as an evaporator. The high-temperature cooling liquid exchanges heat with the cooling liquid at the heat exchanger 9 to heat the cooling liquid; the two air conditioners are circularly operated in parallel, and the moist air is dried by the low-temperature evaporator 23 and then heated at the warm air core 8. And a second heating mode: the compressor 16 is operated, the electronic expansion valve 22 and the stop valve 19 are started to form a complete air conditioning cycle, wherein the heat exchanger 9 serves as a condenser, the heat exchanger 23 serves as an evaporator, the high-temperature cooling liquid exchanges heat with the cooling liquid at the heat exchanger 9, the cooling liquid is heated, and the moist air is heated at the warm air core body 8 after being dried by the low-temperature evaporator 23. A heating mode III: the compressor 16 is operated and the electronic expansion valve 22 is started, the shut-off valve 17, forming a complete air conditioning cycle, wherein both the heat exchanger 9 and the condenser 20 act as condensers and the heat exchanger 23 acts as an evaporator. The high-temperature cooling liquid exchanges heat with the cooling liquid at the heat exchanger 9 to heat the cooling liquid; the moist air is dried by the low-temperature evaporator 23 and then heated in the heater core 8.

In a specific implementation, for example, when the ambient temperature is 15-20 degrees celsius, the heating requirement is generally small at this time, and the heating mode three is operated. When the ambient temperature is 10-15 ℃, the second heating mode is operated, and when the ambient temperature is 5-10 ℃, the heating requirement is generally large at this time, and when the first heating mode is operated, the selection of the heating mode can be dynamically adjusted according to the current ambient temperature, the temperature in the vehicle and the temperature set by the user, which is not limited in this embodiment.

Step S2043: and carrying out thermal management on the passenger compartment and/or the vehicle battery pack according to the heating and dehumidifying mode.

It should be noted that, the heat management of the passenger compartment and/or the vehicle battery pack according to the heating and dehumidifying mode may be to select a corresponding heating and dehumidifying mode according to the current ambient temperature, the temperature in the vehicle, the temperature set by the user, and the like to perform heating.

In specific implementation, when a user instructs to heat a single passenger compartment, the operating mode may be to control the opening of the three-way valve 7, so that the high-temperature coolant and the battery pack low-temperature coolant complete heat exchange in the second heat exchanger 15, and control the three-way valve 10, so that the coolant and the refrigerant realize heat exchange in the first heat exchanger 9, and the switching of the heating and dehumidifying modes may be such that, if the ambient temperature and the in-vehicle temperature have a large difference, it is known that the current heating requirement is large, the heating mode one with a large heating capacity may be adopted, if the current in-vehicle temperature is close to the target temperature set by the user, and the difference between the current in-vehicle temperature and the ambient temperature is also not large, it is known that the steady state in the vehicle needs to be maintained at present, and because the set temperature and the ambient temperature have a small difference, the heating capacity required to maintain the steady state is also smaller than the situation that the ambient temperature and the in-vehicle temperature have a large difference, therefore, in this case, the mode can be dynamically switched to the third heating mode with a smaller heating capacity, and the mode is only used for the steady state of the passenger cabin in the vehicle. When a user instructs to heat a single battery pack, the working mode can be that the water pumps 6 and 12 are controlled to operate, the opening degree of the three-way valve 7 is controlled, so that the high-temperature cooling liquid and the low-temperature cooling liquid of the battery pack complete heat exchange in the heat exchanger 15, and the opening degree of the three-way valve 10 is controlled, so that the heat exchange of the high-temperature cooling liquid and the refrigerant in the heat exchanger 9 is realized. The heating mode switching control can refer to the heating mode switching logic of the passenger compartment, the heating requirement switching according to the battery pack is added, and other control strategies are consistent with the control strategy of the passenger compartment, and the details are not repeated in the embodiment. When the passenger compartment and the battery pack are heated simultaneously, the working modes can be that the water pumps 6 and 12 are controlled to operate simultaneously corresponding to the three heating modes, the warm air core 23 heats air blown out by the blower, the high-temperature cooling liquid and the battery pack low-temperature cooling liquid complete heat exchange at the heat exchanger 15, the heat requirements of the passenger compartment and the battery pack are distributed by controlling the opening degree of the three-way valve 7, and the opening degree of the three-way valve 10 is controlled, so that the heat exchange between the high-temperature cooling liquid and the refrigerant is realized at the heat exchanger 9. Meanwhile, judging whether the vehicle is in a charging state or not, if not, preferentially ensuring heating of the passenger compartment, wherein a control strategy of the three-way valve is to ensure that the passenger compartment distributes enough heat, and the rest heat is distributed to the battery pack; if the vehicle is in a charging state, the battery pack is preferentially heated, the opening degree of the three-way valve is controlled, and after the battery heating demand is responded, the residual heat is distributed to the passenger compartment to heat the passenger compartment. The switching of the heating mode is dynamically switched according to the heating requirements of the passenger compartment and the battery pack, and in general, after the passenger compartment and the battery pack reach steady states, the heating mode is generally a third heating mode.

It should be understood that in the spring and autumn, the cooling requirement may also occur, and the requirement may be that the battery pack is cooled while the passenger compartment is heated or that the battery pack is heated while the passenger compartment is cooled, and the operation mode may be: when the battery pack heats while the passenger compartment is refrigerated, the passenger compartment is refrigerated: the compressor 16 is operated, the electronic expansion valve 22 is started, the stop valve 17 is closed, and a complete air conditioning cycle is formed, wherein the heat exchanger 20 serves as a condenser, and the heat exchanger 23 serves as an evaporator; heating the battery: the cooling liquid is heated by the heater 11, the water pumps 6 and 12 are operated, the high-temperature cooling liquid and the low-temperature cooling liquid of the battery pack complete heat exchange in the heat exchanger 15, and the opening degree of the three-way valve 10 is controlled, so that the high-temperature cooling liquid does not pass through the heat exchanger 9, and unnecessary energy waste caused by heat exchange is avoided; the control strategy can be that the power of the compressor is controlled according to the refrigerating requirement of the passenger compartment, and the power of the heater is controlled according to the target cooling liquid temperature of the cooling liquid flowing through the battery pack fed back by the battery pack controller to heat the battery pack. When the passenger compartment heats and the battery pack cools, the working mode can be two refrigeration cycles: the compressor 16 is operated, the electronic expansion valve 24 is started, the stop valve 17 is closed, the heat exchanger 20 serves as a condenser, the heat exchanger 14 serves as an evaporator, a complete air-conditioning cycle one is formed, the electronic expansion valve 22 is started, and the heat exchanger 23 serves as an evaporator, a complete air-conditioning cycle two is formed, and a heating cycle is formed: the heater 11 heats the cooling liquid, the water pump 6 operates, the warm air core 23 heats air blown out by the air blower, and the opening degree of the three-way valves 7 and 10 is controlled, so that the air does not pass through the heat exchanger 9 and the heat exchanger 15, and unnecessary energy waste caused by heat exchange is avoided. The opening degrees of the electronic expansion valve 22 and the electronic expansion valve 24 are controlled according to the cooling demand to distribute the cooling capacity, whether the passenger compartment heating is requested for dehumidification is judged according to the temperature of the evaporator 23 to control the opening degree of the electronic expansion valve 22, and the opening degree of the electronic expansion valve 24 is controlled according to the target temperature of the coolant flowing through the battery pack fed back by the battery pack controller.

Further, in order to improve the experience of the user in the summer working condition, after the step S202, the method further includes the steps of:

step S2021: and judging whether the vehicle is in a charging state at present.

The vehicle in this embodiment may be a new energy vehicle, and the new energy vehicle may be a vehicle powered by a power battery. The state of charge may be whether the new energy vehicle is charging a power battery.

Step S2022: and when the vehicle is not in a charging state and the temperature of the vehicle battery pack is less than a preset temperature threshold value, starting the compressor and controlling the opening degree of the preset electronic expansion valve to be in the opening degree of the preset electronic expansion valve so as to refrigerate the passenger compartment.

It should be noted that, the work flow of starting the compressor and controlling the opening degree of the preset electronic expansion valve to be the preset electronic expansion valve opening degree to cool the passenger compartment may be: the compressor 16 is operated, the electronic expansion valve 22 is started, the stop valve 17 is closed, a complete air conditioning cycle is formed, the heat exchanger 20 serves as a condenser, the heat exchanger 23 serves as an evaporator 23, a control strategy can be that a target outlet air temperature is obtained according to the ambient temperature, the passenger compartment temperature and the temperature set by a user, the temperature of the evaporator is calculated according to the target outlet air temperature, and then the target compressor rotating speed is calculated. The above-described operating modes and control strategies for cooling the passenger compartment can also be used for cooling the passenger compartment individually.

Step S2023: passenger compartment temperature is obtained.

It should be noted that the passenger compartment temperature may be a temperature within a passenger compartment of the vehicle.

Step S2024: when the passenger compartment temperature is less than or equal to a preset passenger compartment temperature threshold, adjusting the compressor speed to reasonably cool the passenger compartment.

Step S2025: and when the vehicle is not in a charging state and the temperature of the vehicle battery pack is greater than a preset temperature threshold value, starting the compressor and adjusting the opening of the preset electronic expansion valve so as to respectively refrigerate the passenger compartment and the vehicle battery pack.

It should be noted that the preset passenger compartment temperature threshold may be a preset passenger compartment temperature value or a target temperature value set by a user. The preset temperature threshold may be a preset temperature value of the battery pack. The sensible cooling of the passenger compartment may be an adjustment of the compressor speed in accordance with the current cooling demand. The rotating speed of the compressor can be adjusted to be reduced when the current refrigeration demand is small so as to save energy and further reduce the vehicle cost of users. When the passenger compartment temperature is less than or equal to a preset passenger compartment temperature threshold value, the operation mode of adjusting the opening degree of the preset electronic expansion valve to respectively cool the passenger compartment and the vehicle battery pack may be: the compressor 16 is operated, the electronic expansion valve 24 is started, the shutoff valve 17, the heat exchanger 20 acts as a condenser, the heat exchanger 14 acts as an evaporator, forming a complete air conditioning cycle one, the electronic expansion valve 22 is started, and the heat exchanger 23 acts as an evaporator, forming a complete air conditioning cycle two. The cooling capacity is distributed by controlling the opening degrees of the electronic expansion valve 22 and the electronic expansion valve 24, and in order to preferentially secure the cooling of the passenger compartment, the opening degree of the electronic expansion valve 22 may be controlled to be large and the opening degree of the electronic expansion valve 24 may be controlled to be small. Thereby simultaneously cooling the passenger compartment and the vehicle battery pack.

Further, in order to reduce the vehicle cost of the user, after the step S2021, the method further includes: when the vehicle is in a charging state, acquiring a target coolant temperature of coolant flowing through a battery pack, a passenger compartment refrigeration demand and a vehicle battery pack temperature, which are fed back by a battery pack controller; when the passenger compartment has no refrigeration requirement and the temperature of the vehicle battery pack is higher than a preset temperature threshold value, starting a compressor and controlling the opening of a preset electronic expansion valve to refrigerate the vehicle battery pack; when the passenger compartment has a refrigeration demand and the temperature of the vehicle battery pack is higher than a preset temperature threshold value, acquiring the temperature of cooling liquid flowing through the vehicle battery pack, and judging whether the temperature of the cooling liquid is lower than the target temperature of the cooling liquid; when the coolant temperature is less than the target coolant temperature, adjusting an opening degree of the preset electronic expansion valve to distribute more cooling capacity to the passenger compartment to cool the passenger compartment and the vehicle battery pack, respectively.

It should be noted that, the work flow of cooling the vehicle battery pack may be: the compressor 16 is operated, the electronic expansion valve 24 is started, and the shut-off valve 17 is closed, forming a complete air conditioning cycle in which the heat exchanger 20 acts as a condenser and the heat exchanger 14 acts as an evaporator. The control strategy may be to calculate the refrigerant temperature of the heat exchanger 14 according to the target coolant temperature of the coolant flowing through the battery pack fed back by the battery pack controller, calculate the compressor rotation speed according to the refrigerant temperature, and then operate the compressor to cool the battery pack.

In a specific implementation, the compressor 16 is started and the opening of the electronic expansion valve is controlled to preferentially cool the vehicle battery pack, so as to obtain the temperature of the coolant flowing through the vehicle battery pack, and determine whether the temperature of the coolant is less than a target temperature of the coolant flowing through the battery pack, which is fed back by the battery pack controller; when the coolant temperature is less than the target coolant temperature, the opening degrees of the preset electronic expansion valves 22 and 24 are adjusted to cool the passenger compartment and the vehicle battery pack, respectively. When the vehicle is in a charging state, the battery pack is preferentially kept for refrigeration, the opening degree of the electronic expansion valve 24 is large, and the opening degree of the electronic expansion valve 22 is small. The work flow of separately cooling the passenger compartment and the vehicle battery pack can refer to the process of cooling the passenger compartment and the vehicle battery pack at the same time in step S2024, and the detailed description of the embodiment is omitted here.

It should be understood that in other operating conditions, if the user also has cooling and/or heating requirements, reference may be made to the above-described operating modes and control strategies for cooling the passenger compartment individually, cooling the battery pack individually or cooling both the battery pack and the passenger compartment. For example, in spring and autumn, if there is a refrigeration demand, the refrigeration operation mode and the control strategy in the summer can be referred to. This embodiment is not described herein.

When the current environment temperature is larger than a preset first temperature threshold value, judging whether the vehicle is in a charging state currently after judging that the current working condition type is a summer working condition; when the vehicle is not in a charging state, starting a compressor and controlling the opening degree of a preset electronic expansion valve to be in the opening degree of the preset electronic expansion valve so as to refrigerate a passenger compartment; acquiring the temperature of the passenger compartment; adjusting the opening of the preset electronic expansion valve to respectively cool the passenger compartment and the vehicle battery pack when the passenger compartment temperature is less than or equal to a preset passenger compartment temperature threshold value. This embodiment is when summer operating mode, and through judging whether current vehicle is in charged state and take corresponding refrigeration strategy, promote user's experience and feel.

Referring to fig. 7, fig. 7 is a block diagram showing the configuration of the first embodiment of the vehicle thermal management control apparatus according to the present invention.

As shown in fig. 7, a vehicle thermal management control apparatus according to an embodiment of the present invention includes:

the acquiring module 10 is used for acquiring the current ambient temperature when receiving a thermal management control instruction of the vehicle;

the determining module 20 is configured to determine a current working condition type according to the current environment temperature;

a selection module 30, configured to select a corresponding thermal management control strategy according to the current operating condition type;

and the thermal management module 40 is used for carrying out thermal management on the battery pack and/or the passenger compartment through the heat pump system according to the thermal management control strategy.

The method comprises the steps of acquiring the current ambient temperature when a thermal management control instruction of a vehicle is received; determining the type of the current working condition according to the current environment temperature; selecting a corresponding thermal management control strategy according to the current working condition type; and performing thermal management on the battery pack and/or the passenger compartment through the heat pump system according to the thermal management control strategy. According to the embodiment, the current working condition type is determined according to the previous environment temperature, the corresponding thermal management control strategy is selected according to the current working condition type, and the thermal management is performed on the battery pack and/or the passenger compartment through the heat pump system according to the thermal management control strategy. Compared with the existing mode of performing heat management on the vehicle battery pack and the passenger compartment by adopting a fixed heating and refrigerating mode, the mode can select the corresponding heat management control strategy according to the current environment temperature and perform heat management on the battery pack and/or the passenger compartment through the heat pump system, so that the vehicle cost of a user is reduced, and the user experience is improved.

It should be noted that the above-described work flows are only exemplary, and do not limit the scope of the present invention, and in practical applications, a person skilled in the art may select some or all of them to achieve the purpose of the solution of the embodiment according to actual needs, and the present invention is not limited herein.

In addition, the technical details that are not described in detail in this embodiment may refer to the parameter operation method provided in any embodiment of the present invention, and are not described herein again.

A second embodiment of the vehicle thermal management control apparatus according to the present invention is proposed based on the first embodiment of the vehicle thermal management control apparatus according to the present invention.

In this embodiment, the determining module 20 is further configured to determine whether the current ambient temperature is greater than a preset first temperature threshold; when the current environment temperature is greater than a preset first temperature threshold value, judging that the current working condition type is a summer working condition; when the current environment temperature is smaller than or equal to a preset first temperature threshold, judging whether the current environment temperature is larger than a preset second temperature threshold; and when the current environment temperature is greater than a preset second temperature threshold value, judging that the current working condition type is a spring and autumn working condition.

Further, the determining module 20 is further configured to determine whether the current ambient temperature is greater than a preset third temperature threshold when the current ambient temperature is less than or equal to a preset second temperature threshold; when the current environment temperature is greater than a preset third temperature threshold value, judging that the current working condition type is a winter middle-cold working condition; and when the current environment temperature is less than or equal to the preset third temperature threshold, judging that the current working condition type is an extremely cold working condition in winter.

Further, the determining module 20 is further configured to determine whether the vehicle is currently in a charging state; when the vehicle is not in a charging state, starting a heater and controlling a three-way valve at a preset position to be in a preset opening range so as to heat a passenger compartment; acquiring the temperature of the passenger compartment; and when the temperature of the passenger compartment is greater than a preset passenger compartment temperature threshold value, controlling the opening degree of the three-way valve at the preset position so as to enable the high-temperature cooling liquid flowing through the three-way valve to be divided, and heating the passenger compartment and the vehicle battery pack through the divided high-temperature cooling liquid respectively.

Further, the determining module 20 is further configured to obtain a target coolant temperature of the coolant flowing through the battery pack, a passenger compartment heating requirement and a battery pack temperature, which are fed back by the battery pack controller, when the vehicle is in the charging state; when the passenger compartment has no heating requirement and the temperature of the battery pack is lower than a preset temperature threshold value, starting a heater and controlling the three-way valve to heat the vehicle battery pack; acquiring an actual coolant temperature of coolant flowing through a vehicle battery pack, and judging whether the actual coolant temperature is greater than the target coolant temperature; when the actual cooling liquid temperature is higher than the target cooling liquid temperature, reducing the power of a heater to heat a vehicle battery pack by reasonable high-temperature cooling liquid; when the passenger compartment has a heating requirement and the temperature of the battery pack is smaller than a preset temperature threshold value, starting a heater and controlling the three-way valve to heat the passenger compartment and the vehicle battery pack; with the strategy of the preferential assurance battery package heating demand actual coolant temperature is greater than when the target coolant temperature, the adjustment the aperture of three-way valve to make the flow through the high temperature coolant reposition of redundant personnel of three-way valve to the high temperature coolant after shunting heats passenger cabin and vehicle battery package respectively.

Further, the determining module 20 is further configured to obtain a target temperature of the cooling liquid flowing through the motor, which is collected by the motor electronic control system; comparing the current environment temperature with the target cooling liquid temperature to obtain a comparison result; determining the current heat pump working mode according to the comparison result; heating the passenger compartment and/or the vehicle battery pack according to the heat pump operating mode.

Further, the determining module 20 is further configured to determine a current heating requirement according to the current ambient temperature; selecting a corresponding heating dehumidification mode according to the heating requirement; and carrying out thermal management on the passenger compartment and/or the vehicle battery pack according to the heating and dehumidifying mode.

Further, the determining module 20 is further configured to determine whether the vehicle is currently in a charging state; when the vehicle is not in a charging state and the temperature of a vehicle battery pack is smaller than a preset temperature threshold value, starting a compressor and controlling the opening degree of a preset electronic expansion valve to be in the opening degree of the preset electronic expansion valve so as to refrigerate a passenger compartment; acquiring the temperature of the passenger compartment; when the passenger compartment temperature is less than or equal to a preset passenger compartment temperature threshold value, adjusting the rotating speed of a compressor to reasonably refrigerate the passenger compartment; and when the vehicle is not in a charging state and the temperature of the vehicle battery pack is greater than a preset temperature threshold value, starting the compressor and adjusting the opening of the preset electronic expansion valve so as to respectively refrigerate the passenger compartment and the vehicle battery pack.

Further, the determining module 20 is further configured to obtain a target coolant temperature of the coolant flowing through the battery pack, a passenger compartment cooling demand and a vehicle battery pack temperature, which are fed back by the battery pack controller, when the vehicle is in the charging state; when the passenger compartment has no refrigeration requirement and the temperature of the vehicle battery pack is higher than a preset temperature threshold value, starting a compressor and controlling the opening of a preset electronic expansion valve to refrigerate the vehicle battery pack; when the passenger compartment has a refrigeration demand and the temperature of the vehicle battery pack is higher than a preset temperature threshold value, acquiring the temperature of cooling liquid flowing through the vehicle battery pack, and judging whether the temperature of the cooling liquid is lower than the target temperature of the cooling liquid; when the coolant temperature is less than the target coolant temperature, adjusting an opening degree of the preset electronic expansion valve to distribute more cooling capacity to the passenger compartment to cool the passenger compartment and the vehicle battery pack, respectively.

Other embodiments or specific implementation manners of the vehicle thermal management control device of the invention may refer to the above method embodiments, and are not described herein again.

In addition, an embodiment of the present invention further provides a storage medium, where a vehicle thermal management control program is stored on the storage medium, and the vehicle thermal management control program, when executed by a processor, implements the steps of the vehicle thermal management control method described above.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., a rom/ram, a magnetic disk, an optical disk) and includes instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.