阅读说明：本技术 电动汽车的冷却控制装置和冷却控制方法 (Cooling control device and cooling control method for electric vehicle ) 是由 芮富林 季晨捷 文增友 徐峰 于 2021-06-30 设计创作，主要内容包括：本申请涉及一种电动汽车的冷却控制装置和冷却控制方法。所述装置包括：整车控制器,集成换热器,与整车控制器连接的压缩机和高压系统制冷驱动器。集成式换热器设置有第一通道和第二通道,第一通道与压缩机和电动汽车的制冷回路连接,第二通道与电动汽车的高压系统冷却回路连接,高压系统冷却回路设置有第一冷却介质,高压系统制冷驱动器驱动第一冷却介质在高压系统冷却回路和第二通道内流动。整车控制器在达到高压系统降温启动条件时,控制压缩机和高压系统制冷驱动器启动。该装置利用集成式换热器的第一通道和第二通道实现热交换,将第一通道内制冷剂的冷却温度传导给第二通道,对高压系统冷却回路进行冷却,实现对电动汽车的高压系统的降温。(The present application relates to a cooling control device and a cooling control method for an electric vehicle. The device comprises: the system comprises a vehicle control unit, an integrated heat exchanger, a compressor connected with the vehicle control unit and a high-pressure system refrigeration driver. The integrated heat exchanger is provided with a first channel and a second channel, the first channel is connected with the compressor and a refrigeration loop of the electric automobile, the second channel is connected with a high-pressure system cooling loop of the electric automobile, a first cooling medium is arranged on the high-pressure system cooling loop, and a high-pressure system refrigeration driver drives the first cooling medium to flow in the high-pressure system cooling loop and the second channel. And when the vehicle control unit reaches the cooling starting condition of the high-pressure system, the compressor and the high-pressure system refrigeration driver are controlled to start. The device utilizes the first passageway and the second passageway of integrated form heat exchanger to realize the heat exchange, conducts the cooling temperature of refrigerant in the first passageway to the second passageway, cools off high-pressure system cooling circuit, realizes the cooling to electric automobile's high-pressure system.)

1. A cooling control apparatus of an electric vehicle, characterized in that the apparatus comprises:

a vehicle control unit;

the compressor is connected with the vehicle control unit;

an integrated heat exchanger; the integrated heat exchanger is provided with a first channel and a second channel, one end of the first channel is connected with the compressor, the other end of the first channel is connected with a refrigeration loop of the electric automobile, and the second channel is connected with a high-pressure system cooling loop of the electric automobile;

the high-pressure system refrigeration driver is electrically connected with the vehicle control unit;

a first cooling medium is arranged in the high-pressure system cooling loop, and the high-pressure system refrigeration driver is used for driving the first cooling medium to flow in the high-pressure system cooling loop and the second channel;

and when the vehicle control unit reaches the cooling starting condition of the high-pressure system, the compressor and the high-pressure system refrigeration driver are controlled to start.

2. The apparatus of claim 1, further comprising:

the battery refrigeration driver is electrically connected with the vehicle control unit;

the integrated heat exchanger is also provided with a third channel, the third channel is connected with a battery cooling loop, a second cooling medium is arranged in the battery cooling loop, and the battery refrigeration driver is used for driving the second cooling medium to flow in the battery cooling loop and the third channel;

and when the vehicle control unit reaches the battery cooling starting condition, the vehicle control unit controls the battery refrigeration driver to start.

3. The apparatus of claim 1, wherein the high voltage system of the electric vehicle comprises: one or more of a battery high-voltage line terminal, a vehicle-end quick charging interface high-voltage line terminal, a motor high-voltage line terminal and a motor controller high-voltage line terminal.

4. The apparatus according to claim 2, wherein the first cooling medium is cooling oil, and the second cooling medium is cooling liquid;

or both the first cooling medium and the second cooling medium are cooling liquids.

5. The apparatus of claim 1 or 3, wherein the vehicle control unit is further configured to:

the method comprises the steps of obtaining the temperature of each high-voltage line terminal of a high-voltage system of the electric automobile, and determining whether the temperature of each high-voltage line terminal of the high-voltage system of the electric automobile reaches a cooling starting condition of the high-voltage system or not according to the temperature of each high-voltage line terminal of the high-voltage system of the electric automobile.

6. The apparatus of claim 2, wherein the vehicle control unit is further configured to:

and acquiring the inlet and outlet temperature of the battery, and determining whether the battery cooling starting condition is met according to the inlet and outlet temperature of the battery.

7. The apparatus of claim 2, wherein the vehicle control unit is further configured to:

detecting the charging state of the battery, and determining whether a charging end condition is reached according to the charging state of the battery;

controlling the compressor and the high-pressure system refrigerant driver to shut down when it is determined that the end-of-charge condition is reached.

8. A cooling control method of an electric vehicle, characterized by comprising:

when the cooling starting condition of the high-pressure system is met, controlling a compressor and a high-pressure system refrigeration driver to start, wherein the compressor is connected with one end of a first channel of the integrated heat exchanger, and the other end of the first channel is connected with a refrigeration loop of the electric vehicle; the integrated heat exchanger is also provided with a second channel, the second channel is connected with the high-pressure system cooling loop, and a first cooling medium is arranged in the high-pressure system cooling loop;

and after the high-pressure system refrigeration driver is started, the first cooling medium is driven to flow in the high-pressure system cooling loop and the second channel.

9. The method of claim 8, further comprising:

when the battery cooling starting condition is met, controlling a battery refrigeration driver to start, wherein the integrated heat exchanger is also provided with a third channel which is connected with the battery cooling loop, and a second cooling medium is arranged in the battery cooling loop;

and after the battery refrigeration driver is started, driving a second cooling medium to flow in the battery cooling loop and the third channel.

10. The method of claim 8, further comprising:

the method comprises the steps of obtaining the temperature of each high-voltage line terminal of a high-voltage system of the electric automobile, and determining whether the temperature of each high-voltage line terminal of the high-voltage system of the electric automobile reaches a cooling starting condition of the high-voltage system or not according to the temperature of each high-voltage line terminal of the high-voltage system of the electric automobile.

Technical Field

The present disclosure relates to the field of electric vehicles, and particularly to a cooling control device and a cooling control method for an electric vehicle.

Background

Along with the development of electric automobile technology to and electric automobile in the gradual popularization and application of people's life, work, electric automobile quick charge's demand is also bigger and bigger, and battery calorific capacity is great during nevertheless quick charge, leads to electric automobile's temperature to rise to some extent, damages for avoiding appearing the automobile parts, needs to cool down electric automobile.

Traditionally, adopt common natural cooling, air-cooled or liquid cooling's mode more, cool off the cooling to electric automobile's battery, however natural cooling is consuming time longer and the cooling effect is not obvious enough, and air-cooled's cooling capacity is limited and receive the environmental impact big, and current liquid cooling mode also can't satisfy quick charge's heat dissipation requirement because the restriction of cooling capacity.

Therefore, the conventional common cooling mode cannot timely cool and dissipate heat generated by rapid charging in a high-power rapid charging state, and still has the problem that automobile parts are easy to damage.

Disclosure of Invention

In view of the above, it is necessary to provide a cooling control apparatus and a cooling control method for an electric vehicle, which can dissipate heat generated by rapid charging in time and ensure safety performance of vehicle components, in order to solve the above-mentioned technical problems.

A cooling control apparatus of an electric vehicle, the apparatus comprising:

a vehicle control unit;

the compressor is connected with the vehicle control unit;

an integrated heat exchanger; the integrated heat exchanger is provided with a first channel and a second channel, one end of the first channel is connected with the compressor, the other end of the first channel is connected with a refrigeration loop of the electric automobile, and the second channel is connected with a high-pressure system cooling loop of the electric automobile;

the high-pressure system refrigeration driver is electrically connected with the vehicle control unit;

a first cooling medium is arranged in the high-pressure system cooling loop, and the high-pressure system refrigeration driver is used for driving the first cooling medium to flow in the high-pressure system cooling loop and the second channel;

and when the vehicle control unit reaches the cooling starting condition of the high-pressure system, the compressor and the high-pressure system refrigeration driver are controlled to start.

In one embodiment, the apparatus further comprises:

the battery refrigeration driver is electrically connected with the vehicle control unit;

the integrated heat exchanger is also provided with a third channel, the third channel is connected with a battery cooling loop, a second cooling medium is arranged in the battery cooling loop, and the battery refrigeration driver is used for driving the second cooling medium to flow in the battery cooling loop and the third channel;

and when the vehicle control unit reaches the battery cooling starting condition, the vehicle control unit controls the battery refrigeration driver to start.

In one embodiment, the high voltage system of the electric vehicle includes: one or more of a battery high-voltage line terminal, a vehicle-end quick charging interface high-voltage line terminal, a motor high-voltage line terminal and a motor controller high-voltage line terminal.

In one embodiment, the first cooling medium is cooling oil, and the second cooling medium is cooling liquid;

or both the first cooling medium and the second cooling medium are cooling liquids.

In one embodiment, the vehicle control unit is further configured to:

the method comprises the steps of obtaining the temperature of each high-voltage line terminal of a high-voltage system of the electric automobile, and determining whether the temperature of each high-voltage line terminal of the high-voltage system of the electric automobile reaches a cooling starting condition of the high-voltage system or not according to the temperature of each high-voltage line terminal of the high-voltage system of the electric automobile.

In one embodiment, the vehicle control unit is further configured to:

and acquiring the inlet and outlet temperature of the battery, and determining whether the battery cooling starting condition is met according to the inlet and outlet temperature of the battery.

In one embodiment, the vehicle control unit is further configured to:

detecting the charging state of the battery, and determining whether a charging end condition is reached according to the charging state of the battery;

controlling the compressor and the high-pressure system refrigerant driver to shut down when it is determined that the end-of-charge condition is reached.

A cooling control method of an electric vehicle, the method comprising:

when the cooling starting condition of the high-pressure system is met, controlling a compressor and a high-pressure system refrigeration driver to start, wherein the compressor is connected with one end of a first channel of the integrated heat exchanger, and the other end of the first channel is connected with a refrigeration loop of the electric vehicle; the integrated heat exchanger is also provided with a second channel, the second channel is connected with the high-pressure system cooling loop, and a first cooling medium is arranged in the high-pressure system cooling loop;

and after the high-pressure system refrigeration driver is started, the first cooling medium is driven to flow in the high-pressure system cooling loop and the second channel.

In one embodiment, the method further comprises:

when the battery cooling starting condition is met, controlling a battery refrigeration driver to start, wherein the integrated heat exchanger is also provided with a third channel which is connected with the battery cooling loop, and a second cooling medium is arranged in the battery cooling loop;

and after the battery refrigeration driver is started, driving a second cooling medium to flow in the battery cooling loop and the third channel.

In one embodiment, the method further comprises:

the method comprises the steps of obtaining the temperature of each high-voltage line terminal of a high-voltage system of the electric automobile, and determining whether the temperature of each high-voltage line terminal of the high-voltage system of the electric automobile reaches a cooling starting condition of the high-voltage system or not according to the temperature of each high-voltage line terminal of the high-voltage system of the electric automobile.

In the cooling control device and the cooling control method for the electric automobile, the integrated heat exchanger is provided with a first channel and a second channel, one end of the first channel is connected with the compressor, the other end of the first channel is connected with a refrigeration loop of the electric automobile, and the second channel is connected with a high-pressure system cooling loop of the electric automobile. A first cooling medium is arranged in the high-pressure system cooling loop, and the high-pressure system refrigeration driver is used for driving the first cooling medium to flow in the high-pressure system cooling loop and the second channel. And when the high-pressure system cooling starting condition is reached, the vehicle control unit controls the compressor and the high-pressure system refrigeration driver to start. The device is at electric automobile charging process, utilizes the first passageway and the second passageway of integrated form heat exchanger to realize the heat exchange, conducts the cooling temperature of refrigerant in the first passageway for the second passageway, through the coolant in the second passageway, in time cools off the heat dissipation around giving out heat in the high-pressure system cooling circuit that high-pressure system laid, realizes the cooling to electric automobile's high-pressure system to avoid the damage of electric automobile each part, ensure electric automobile's normal, steady operation.

Drawings

FIG. 1 is a block diagram showing a cooling control apparatus for an electric vehicle according to an embodiment;

FIG. 2 is a schematic diagram of a cooling configuration of a high pressure system and a high pressure system cooling circuit in one embodiment;

FIG. 3 is a block diagram showing a cooling control apparatus for an electric vehicle according to another embodiment;

FIG. 4 is a block diagram of an integrated heat exchanger according to one embodiment;

FIG. 5 is a schematic view showing the overall configuration of a cooling control apparatus for an electric vehicle according to an embodiment;

FIG. 6 is a flowchart illustrating a cooling control method for an electric vehicle according to an embodiment;

FIG. 7 is a flowchart illustrating a cooling control method for an electric vehicle according to another embodiment;

fig. 8 is a logic control flow diagram of a cooling control method of an electric vehicle according to still another embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In one embodiment, as shown in fig. 1, a cooling control device for an electric vehicle is provided, and as can be seen from fig. 1, the cooling control device for an electric vehicle specifically includes: vehicle control unit 102, compressor 104 connected with vehicle control unit 102, integrated heat exchanger 106, and high-pressure system refrigeration driver 108 electrically connected with vehicle control unit 102, wherein:

the integrated heat exchanger 106 is provided with a first channel 1062 and a second channel 1064, wherein one end of the first channel 1062 is connected to the compressor 104, the other end is connected to the refrigeration circuit 110 of the electric vehicle, and the second channel 1064 is connected to the high-pressure system cooling circuit 112 of the electric vehicle.

The high-pressure system cooling circuit 112 is laid around a high-pressure system of the electric vehicle, a first cooling medium is disposed in the high-pressure system cooling circuit, and the high-pressure system refrigeration driver 108 is configured to drive the first cooling medium to flow in the high-pressure system cooling circuit 112 and the second channel 1064.

When the high-pressure system cooling start condition is reached, the vehicle control unit 102 controls the compressor 104 and the high-pressure system refrigeration driver 108 to start, so as to drive the first cooling medium to flow in the high-pressure system cooling circuit 112 and the second channel 1064.

Specifically, the vehicle control unit 102 obtains the temperature of each high-voltage line terminal of the high-voltage system of the electric vehicle, and determines whether a cooling start condition of the high-voltage system is met according to the temperature of each high-voltage line terminal of the high-voltage system of the electric vehicle.

Further, the vehicle control unit 102 obtains a preset high-voltage line terminal temperature threshold value, compares the temperature of each high-voltage line terminal with the preset high-voltage line terminal temperature threshold value, and determines that a high-voltage system cooling starting condition is reached when it is determined that the high-voltage line terminal temperature reaching the preset high-voltage line terminal temperature threshold value exists, so that the high-voltage system cooling loop 112 is utilized to cool the corresponding high-voltage line terminal of which the high-voltage line terminal temperature reaches the preset high-voltage line terminal temperature threshold value.

The refrigeration circuit 110 of the electric vehicle is provided with a refrigerant, the first channel 1062 is connected with the refrigeration circuit 110 of the electric vehicle and the compressor 104, and when the compressor 104 is started, the refrigerant is driven to flow in the refrigeration circuit 110 of the electric vehicle and the first channel 1062. When the refrigerant flows through the first channel 1062 and the first cooling medium flows through the second channel 1064, the heat carried by the first cooling medium in the second channel 1064 is transferred to the refrigerant in the first channel 1062 through the integrated heat exchanger 106, that is, the heat carried by the first cooling medium in the second channel 1064 is taken away by the refrigerant in the first channel 1062, so that heat exchange is realized, and the high-pressure system of the electric vehicle is cooled.

In one embodiment, as shown in fig. 2, a cooling structure composed of a high-voltage system and a high-voltage system cooling circuit is provided, as can be seen from fig. 2, the high-voltage system is provided with a plurality of high-voltage line terminals 202, a heat conducting plate 204 is arranged between each high-voltage line terminal 202 and the high-voltage system cooling circuit 112, the heat generated by each high-voltage line terminal 202 in the high-voltage system of the electric vehicle during the quick charging process is transferred to the high-voltage system cooling circuit 112 through the heat conducting plate 204, and the heat generated by each high-voltage line terminal 202 in the high-voltage system of the electric vehicle is taken away through the high-voltage system cooling circuit 112, so as to cool the high-voltage system of the electric vehicle.

Specifically, the high-voltage system of the electric automobile can comprise a battery high-voltage line terminal, a vehicle-end quick-charging interface high-voltage line terminal, a motor high-voltage line terminal and a motor controller high-voltage line terminal, and by laying a high-voltage system cooling circuit around the high-voltage system of the electric automobile, in the flowing process of a first cooling medium in the high-voltage system cooling circuit, the heat productivity of each high-voltage line terminal in the electric automobile quick-charging process is taken away in time, so that the high-voltage system of the electric automobile is cooled.

Furthermore, the quick charging port of the vehicle end, the high-voltage interface on the battery, the motor interface and the motor controller interface are all provided with high-voltage line interfaces, and a first cooling medium in a cooling loop of the high-voltage system is utilized to cool the battery high-voltage line terminal, the vehicle end high-voltage line terminal, the motor high-voltage line terminal and the motor controller high-voltage line terminal which are provided with the high-voltage line interfaces.

Wherein the first cooling medium may be cooling oil, which may include different kinds of mineral oil as well as synthetic oil.

In one embodiment, the first cooling medium may also be a non-conductive cooling fluid, such as anhydrous ethylene glycol or anhydrous propylene glycol, or the like.

In one embodiment, the refrigeration circuit of the electric vehicle is connected in parallel with an evaporator circuit, wherein the evaporator circuit is used for cooling the passenger compartment, and the evaporator circuit comprises a compressor, a condenser, an expansion valve, a pipeline connecting all the components and the like.

In the cooling control device of the electric automobile, the integrated heat exchanger is provided with the first channel and the second channel, one end of the first channel is connected with the compressor, the other end of the first channel is connected with the refrigeration loop of the electric automobile, the second channel is connected with the high-pressure system cooling loop of the electric automobile, the first cooling medium is arranged in the high-pressure system cooling loop, and the high-pressure system refrigeration driver is used for driving the first cooling medium to flow in the high-pressure system cooling loop and the second channel. And when the high-pressure system cooling starting condition is reached, the vehicle control unit controls the compressor and the high-pressure system refrigeration driver to start. The device is at electric automobile charging process, utilizes the first passageway and the second passageway of integrated form heat exchanger to realize the heat exchange, conducts the cooling temperature of refrigerant in the first passageway for the second passageway, through the coolant in the second passageway, in time cools off the heat dissipation around giving out heat in the high-pressure system cooling circuit that high-pressure system laid, realizes the cooling to electric automobile's high-pressure system to avoid the damage of electric automobile each part, ensure electric automobile's normal, steady operation.

In one embodiment, as shown in fig. 3, a cooling control device for an electric vehicle is provided, and as can be seen from fig. 3, the cooling control device for an electric vehicle specifically includes: a vehicle control unit 102, a compressor 104 connected with the vehicle control unit 102, an integrated heat exchanger 106, a high-pressure system refrigeration driver 108 and a battery refrigeration driver 114 electrically connected with the vehicle control unit 102, wherein:

the integrated heat exchanger 106 is provided with a first channel 1062, a second channel 1064 and a third channel 1066, one end of the first channel 1062 is connected with the compressor 104, the other end is connected with the refrigeration circuit 110 of the electric vehicle, the second channel 1064 is connected with the high-pressure system cooling circuit 112 of the electric vehicle, and the third channel 1066 is connected with the battery cooling circuit 116.

The high-pressure system cooling circuit 112 is laid around a high-pressure system of the electric vehicle, a first cooling medium is disposed in the high-pressure system cooling circuit, and the high-pressure system refrigeration driver 108 is configured to drive the first cooling medium to flow in the high-pressure system cooling circuit 112 and the second channel 1064.

The battery cooling circuit 116 is laid around the battery 118, a second cooling medium is provided in the battery cooling circuit 116, and the battery refrigeration driver 114 is configured to drive the second cooling medium to flow in the battery cooling circuit 116 and the third channel 1066.

The vehicle control unit 102 obtains the temperature of each high-voltage line terminal of the high-voltage system of the electric vehicle, and determines whether a cooling start condition of the high-voltage system is met according to the temperature of each high-voltage line terminal of the high-voltage system of the electric vehicle.

Specifically, when the high-pressure system cool-down start condition is reached, the hybrid controller 102 controls the compressor 104 and the high-pressure system refrigeration driver 108 to start, so as to drive the first cooling medium to flow in the high-pressure system cooling circuit 112 and the second channel 1064.

The high-pressure system cooling driver 108 is configured to connect between the second channel 1064 and the charging terminal, and is configured to drive the first cooling medium to circulate in the high-pressure system cooling circuit 112 and adjust the flow rate of the first cooling medium.

The vehicle control unit 102 obtains the inlet and outlet temperature of the battery, and determines whether the battery cooling starting condition is met according to the inlet and outlet temperature of the battery.

Specifically, when the battery cool-down start condition is reached, the hybrid controller 102 controls the battery cooling driver 114 to start, and further drives the second cooling medium to flow in the battery cooling circuit 116 and the third channel 1066.

Further, the refrigeration circuit 110 of the electric vehicle is provided with a refrigerant, the first passage 1062 is connected to the refrigeration circuit 110 of the electric vehicle and the compressor 104, and when the compressor 104 is started, the refrigerant is driven to flow through the refrigeration circuit 110 of the electric vehicle and the first passage 1062. When the refrigerant flows through the first channel 1062 and the second cooling medium flows through the third channel 1066, the heat carried by the second cooling medium in the third channel 1066 is transferred to the refrigerant in the first channel 1062 through the integrated heat exchanger 106, that is, the heat carried by the second cooling medium in the third channel 1066 is taken away by the refrigerant in the first channel 1062, so that heat exchange is realized, and the temperature of the battery is reduced.

The battery refrigeration driver 114 is disposed in the battery cooling loop 116, and drives the second cooling medium to circulate in the battery cooling loop 116 according to a control instruction sent by the vehicle control unit 102 when the temperature value of the inlet and outlet of the battery reaches the battery cooling start condition, and adjusts the flow rate of the second cooling medium.

In one embodiment, the second cooling medium may be a cooling fluid, for example, a cooling fluid obtained by mixing ethylene glycol and water according to a predetermined ratio, such as a cooling fluid obtained by mixing ethylene glycol 50% and water 50%.

In one embodiment, as shown in fig. 4, an integrated heat exchanger is provided, and as can be seen from fig. 4, the integrated heat exchanger is provided with a first channel 1062, a second channel 1064 and a third channel 1066, wherein the second channel 1064, the first channel 1062 and the third channel 1066 are arranged in parallel, that is, when the high-pressure system of the electric vehicle needs to be cooled, heat exchange is performed through the first channel 1062 and the second channel 1064, and heat carried by a first cooling medium in the second channel 1064 is taken away by a refrigerant in the first channel 1062.

Likewise, when it is desired to cool the battery, the refrigerant passing through the first channel 1062 removes heat carried by the second cooling medium in the third channel 1066.

In one embodiment, a cooling control device of an electric vehicle is provided, wherein the vehicle control unit is further configured to:

detecting the charging state of the battery, and determining whether a charging end condition is reached according to the charging state of the battery;

when it is determined that the end-of-charge condition is reached, the compressor and the high-pressure system refrigerant driver are controlled to shut down.

Specifically, the vehicle control unit further determines whether the charging state of the battery reaches the charging end condition by detecting the charging state of the battery in real time and acquiring a preset charging end condition. The charging end condition may be that the battery storage capacity of the electric vehicle meets a preset electric quantity requirement, where the preset electric quantity requirement may be preset or adjusted by a user, or may be set by default when the electric vehicle leaves a factory, for example, the battery storage capacity of the electric vehicle reaches 95% to 98%, and it may be determined that the preset electric quantity requirement is met, and then the charging end condition is reached.

When the charging state of the battery reaches a charging end condition, namely high-power quick charging is ended, the vehicle control unit controls the compressor and the high-voltage system refrigeration driver to be closed, and cooling operation is stopped.

In one embodiment, before detecting the state of charge of the battery and determining whether the end-of-charge condition is reached according to the state of charge of the battery, the vehicle controller is further configured to:

judging whether the preset temperature requirement is met or not according to the inlet and outlet temperature of the battery;

and when the preset temperature requirement is determined to be met, controlling the battery refrigeration driver to be closed.

Specifically, when the temperature of the inlet and the outlet of the battery falls back to a proper temperature range which is reasonably specified, the preset temperature requirement is determined to be met, and then the vehicle control unit controls the battery refrigeration driver to be turned off.

The inlet and outlet temperature of the battery meets the preset temperature requirement, and when the battery refrigeration driver is closed, the high-voltage system refrigeration driver continues to keep a working state so as to realize uniform heat dissipation of all high-voltage line terminals of the electric automobile.

In one embodiment, the motor cooling liquid waste heat recovery can be carried out through a third channel and is recycled to a cockpit for heating passengers, and similarly, the motor cooling oil waste heat recovery can be realized through a second channel.

In the cooling control device for the electric automobile, the integrated heat exchanger is provided with a first channel and a third channel, the third channel is connected with the battery cooling loop, a second cooling medium is arranged in the battery cooling loop, and the battery refrigeration driver is used for driving the second cooling medium to flow in the battery cooling loop and the third channel. And when the vehicle control unit reaches the battery cooling starting condition, the battery refrigeration driver is controlled to start. The device utilizes the first channel and the third channel of the integrated heat exchanger to realize heat exchange in the charging process of the electric automobile, the cooling temperature of a refrigerant in the first channel is conducted to the third channel, and the heat productivity in a battery cooling loop laid around a battery is cooled and dissipated in time through a cooling medium in the third channel, so that the battery of the electric automobile is cooled, the battery of the electric automobile is prevented from being damaged, and the normal and stable operation of the electric automobile is guaranteed.

In one embodiment, as shown in fig. 5, there is provided an overall structure of a cooling control device of an electric vehicle, and as can be seen from fig. 5, the cooling control device of an electric vehicle includes: a first channel 5022, a second channel 5024 and a third channel 5026 which constitute an integrated heat exchanger, a high-pressure system refrigeration driver 504, a battery 506, a battery refrigeration driver 508, a refrigeration circuit 510 of an electric vehicle, a high-pressure system cooling circuit 512 of the electric vehicle, a battery cooling circuit 514, a three-way valve 516, a charging terminal 518, a high-pressure water heater 520, a first temperature sensor 522, and a second temperature sensor 524, wherein:

the first channel 5022 of the integrated heat exchanger is connected with the refrigeration loop 510 of the electric automobile, the second channel 5024 of the integrated heat exchanger is connected with the high-voltage system cooling loop 512 of the electric automobile, and the high-voltage system cooling loop 512 is further connected with the high-voltage system refrigeration driver 504, the battery 506, the charging terminal 518 and the first temperature sensor 522. The third channel 5026 of the integrated heat exchanger is connected to the battery cooling circuit 514, and the battery 506, the battery refrigeration driver 508, the three-way valve 516 and the second temperature sensor 524 are also connected to the battery cooling circuit 514. The first temperature sensor 522 is used for detecting the temperature of each high-voltage line terminal of the high-voltage system, and the second temperature sensor 524 is used for detecting the inlet and outlet temperature of the battery.

The high-pressure system cooling circuit 512 is laid around a high-pressure system of the electric vehicle, a first cooling medium is arranged in the high-pressure system cooling circuit, and the high-pressure system refrigeration driver 504 is used for driving the first cooling medium to flow in the high-pressure system cooling circuit 512 and the second channel 5024. A battery cooling circuit 514 is routed around the batteries 506, a second cooling medium is provided within the battery cooling circuit 514, and a battery refrigeration driver 508 is used to drive the second cooling medium to flow within the battery cooling circuit 514 and the third channel 5026.

Further, when the refrigerant flows through the first channel 5022 and the first cooling medium flows through the second channel 5024, the heat carried by the first cooling medium in the second channel 5024 is transferred to the refrigerant in the first channel 5022 through the integrated heat exchanger, that is, the heat carried by the first cooling medium in the second channel 5024 is taken away by the refrigerant in the first channel 5022, so that heat exchange is realized, and the high-pressure system of the electric vehicle is cooled.

Similarly, when the refrigerant flows through the first channel 5022 and the second cooling medium flows through the third channel 5026, heat carried by the second cooling medium in the third channel 5026 is transferred to the refrigerant in the first channel 5022 through the integrated heat exchanger, namely, the refrigerant passing through the first channel 5022 carries away the heat carried by the second cooling medium in the third channel 5026, so that heat exchange is realized, and the temperature of the battery is reduced.

The high-pressure water heater 520 is connected to the three-way valve 516 and the battery 506, and the high-pressure water heater 520 is used to assist in heating the battery when the battery temperature is low and the charging operation cannot be performed. When the battery needs to be heated in an auxiliary way, the 1 port and the 3 ports of the three-way valve 516 are communicated, and the high-pressure water heater 520 is used for heating the battery in an auxiliary way. When the battery needs to be cooled, the port 1 of the three-way valve 516 is connected with the port 2, the battery refrigeration driver 508 drives the second cooling medium to circularly run in the third channel 5026 and the battery cooling loop 514, and the second cooling medium in the third channel 1066 is subjected to heat exchange through the refrigerant flowing in the refrigeration loop 510 of the electric vehicle connected with the second channel 5024, so that the battery is cooled.

In the implementation, the first channel, the second channel and the third channel are arranged, the first channel and the second channel are used for heat exchange, the first channel and the third channel are used for heat exchange, the cooling temperature of the refrigerant in the first channel is conducted to the second channel and the third channel, the heat productivity of each high-voltage wire terminal in the quick charging process of the electric automobile is timely taken away through the cooling medium in the second channel, the heat productivity of the battery in the expansion process of the electric automobile is timely taken away through the cooling medium in the third channel, the high-voltage system of the electric automobile and the cooling of the battery are achieved, further, damage to each component of the electric automobile can be avoided, and normal and stable operation of the electric automobile is guaranteed.

The respective modules in the cooling control apparatus for an electric vehicle described above may be entirely or partially implemented by software, hardware, and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.

In one embodiment, as shown in fig. 6, a cooling control method for an electric vehicle is provided, which is exemplified by applying the method to a vehicle control unit of the electric vehicle in fig. 1, and includes the following steps:

step S602, the temperature of each high-voltage line terminal of the high-voltage system of the electric automobile is obtained, and whether the temperature of the high-voltage line terminal of the high-voltage system of the electric automobile reaches a cooling starting condition is determined according to the temperature of each high-voltage line terminal of the high-voltage system of the electric automobile.

Specifically, the vehicle control unit obtains the temperature of each high-voltage line terminal of the high-voltage system detected by the first temperature sensor, acquires a preset high-voltage line terminal temperature threshold value, compares the temperature of each high-voltage line terminal of the high-voltage system with the corresponding preset high-voltage line terminal temperature threshold value, and determines to reach a high-voltage system cooling starting condition when the temperature of the high-voltage line terminal meeting the preset high-voltage line terminal temperature threshold value exists.

And step S604, controlling the compressor and the high-pressure system refrigeration driver to start when the high-pressure system cooling starting condition is met, and driving a first cooling medium to flow in the high-pressure system cooling loop and the second channel after the high-pressure system refrigeration driver is started.

Specifically, when a high-voltage system cooling starting condition is met, namely the temperature of a high-voltage line terminal meeting a preset high-voltage line terminal temperature threshold value exists, the compressor and the high-voltage system refrigeration driver are controlled to be started, and after the high-voltage system refrigeration driver is started, a first cooling medium is driven to flow in a high-voltage system cooling loop and a second channel of the electric automobile.

The compressor is connected with one end of a first channel arranged on the integrated heat exchanger, and the other end of the first channel is connected with a refrigeration loop of the electric vehicle. The integrated heat exchanger is further provided with a second channel, the second channel is connected with a high-pressure system cooling circuit, the high-pressure system cooling circuit is laid around a high-pressure system of the electric automobile, and a first cooling medium is arranged in the high-pressure system cooling circuit.

Furthermore, a refrigerant is arranged in the refrigeration circuit of the electric automobile, the first channel is connected with the refrigeration circuit of the electric automobile and the compressor, and when the compressor is started, the refrigerant is driven to flow in the refrigeration circuit of the electric automobile and the first channel. When the refrigerant flows through the first channel and the first cooling medium flows through the second channel, the heat carried by the first cooling medium in the second channel is transferred to the refrigerant in the first channel through the integrated heat exchanger, namely the heat carried by the first cooling medium in the second channel is taken away by the refrigerant in the first channel, so that heat exchange is realized, and the high-pressure system of the electric automobile is cooled.

According to the cooling control method of the electric automobile, whether the high-voltage system cooling starting condition is met or not is determined by obtaining the temperature of each high-voltage line terminal of the high-voltage system of the electric automobile and according to the temperature of each high-voltage line terminal of the high-voltage system of the electric automobile. When the temperature reduction starting condition of the high-pressure system is met, the compressor and the high-pressure system refrigeration driver are controlled to start, and the first cooling medium is driven to flow in a high-pressure system cooling loop and a second channel of the electric automobile. The device is at electric automobile charging in-process, utilizes the realization heat exchange of integrated form heat exchanger, conducts the cooling temperature of refrigerant in the first passageway for the second passageway, through the coolant in the second passageway, will in time cool off the heat dissipation around giving out heat in the high-pressure system cooling circuit that high-pressure system laid, realizes the cooling to electric automobile's high-pressure system to avoid the damage of electric automobile each part, ensure electric automobile's normal, steady operation.

In an embodiment, as shown in fig. 7, a cooling control method for an electric vehicle is provided, which is described by taking the method as an example applied to the electric vehicle in fig. 1, and specifically includes the following steps:

step S702, acquiring the temperature of each high-voltage line terminal of the high-voltage system of the electric automobile, and determining whether the temperature of each high-voltage line terminal of the high-voltage system of the electric automobile reaches a cooling starting condition or not according to the temperature of each high-voltage line terminal of the high-voltage system of the electric automobile.

Specifically, the vehicle control unit obtains the temperature of each high-voltage line terminal of the high-voltage system detected by the first temperature sensor, acquires a preset high-voltage line terminal temperature threshold value, compares the temperature of each high-voltage line terminal of the high-voltage system with the corresponding preset high-voltage line terminal temperature threshold value, and determines to reach a high-voltage system cooling starting condition when the temperature of the high-voltage line terminal meeting the preset high-voltage line terminal temperature threshold value exists.

Step S704, the temperature of the inlet and outlet of the battery is obtained, and whether the battery cooling start condition is met is determined according to the temperature of the inlet and outlet of the battery.

Specifically, the vehicle control unit obtains the inlet and outlet temperature of the battery detected by the second temperature sensor, obtains a preset battery temperature threshold, compares the inlet and outlet temperature of the battery with the preset battery temperature threshold, and determines that the battery cooling starting condition is met when the inlet and outlet temperature of the battery meets the preset battery temperature threshold.

And step S706, when the high-pressure system cooling starting condition is met, controlling the compressor and the high-pressure system refrigeration driver to start, and driving a first cooling medium to flow in a high-pressure system cooling loop and a second channel of the electric automobile after the high-pressure system refrigeration driver is started.

Specifically, when a high-voltage system cooling starting condition is met, namely the temperature of a high-voltage line terminal meeting a preset high-voltage line terminal temperature threshold value exists, the connected compressor and the high-voltage system refrigeration driver are controlled to start, and a first cooling medium is driven to flow in a high-voltage system cooling loop and a second channel of the electric automobile.

And step S708, when the battery cooling starting condition is reached, controlling the connected battery refrigeration driver to start, and driving a second cooling medium to flow in the battery cooling loop and the third channel after the battery refrigeration driver is started.

Specifically, when the battery cooling starting condition is met and the inlet and outlet temperature of the battery meets the preset battery temperature threshold, the connected battery refrigeration driver is controlled to start, and after the battery refrigeration driver is started, the second cooling medium is driven to flow in the battery cooling loop and the third channel.

The integrated heat exchanger is also provided with a third channel, the third channel is connected with a battery cooling loop, the battery cooling loop is laid around the battery, and a second cooling medium is arranged in the battery cooling loop.

Furthermore, a refrigerant is arranged in the refrigeration circuit of the electric automobile, the first channel is connected with the refrigeration circuit of the electric automobile and the compressor, and when the compressor is started, the refrigerant is driven to flow in the refrigeration circuit of the electric automobile and the first channel. When the refrigerant flows through the first channel and the second cooling medium flows through the third channel, the heat carried by the second cooling medium in the third channel is transferred to the refrigerant in the first channel through the integrated heat exchanger, namely, the heat carried by the second cooling medium in the third channel is taken away by the refrigerant in the first channel, so that heat exchange is realized, and the temperature of the battery is reduced.

Step S710 detects a charging state of the battery, and determines whether a charging end condition is reached according to the charging state of the battery.

Specifically, the vehicle control unit further judges whether the charging state of the battery reaches a charging end condition by detecting the charging state of the battery in real time and acquiring preset charging regulation. The charging end condition may be that the battery storage capacity of the electric vehicle meets a preset electric quantity requirement, where the preset electric quantity requirement may be preset or adjusted by a user, or may be set by default when the electric vehicle leaves a factory, for example, the battery storage capacity of the electric vehicle reaches 95% to 98%, and it may be determined that the preset electric quantity requirement is met, and then the charging end condition is reached.

And step 712, controlling the compressor and the high-pressure system refrigeration driver to be closed when the charge ending condition is determined to be reached.

Specifically, when the charging state of the battery reaches a charging end condition, namely high-power quick charging is ended, the vehicle control unit controls the compressor and the high-voltage system refrigeration driver to be closed, and the cooling operation is stopped.

According to the cooling control method of the electric automobile, the first channel, the second channel and the third channel are arranged, heat exchange is carried out through the first channel and the second channel, heat exchange is carried out through the first channel and the third channel, the cooling temperature of the refrigerant in the first channel is conducted to the second channel and the third channel, the heat productivity of each high-voltage wire terminal in the quick charging process of the electric automobile is taken away in time through the cooling medium in the second channel, the heat productivity of the battery in the expansion process of the electric automobile is taken away in time through the cooling medium in the third channel, the high-voltage system of the electric automobile and the temperature of the battery are reduced, further, damage to each part of the electric automobile can be avoided, and normal and stable operation of the electric automobile is guaranteed.

In an embodiment, as shown in fig. 8, a logic control flow chart of a cooling control method of an electric vehicle is provided, and as can be seen from fig. 8, the logic control flow of the cooling control method of the electric vehicle specifically includes:

1) and when the quick charging is detected to be started, the temperature of each high-voltage line terminal of the high-voltage system of the electric automobile is obtained.

2) And determining whether the temperature of each high-voltage line terminal of the high-voltage system of the electric automobile reaches a cooling starting condition or not.

3) And when the temperature reduction starting condition of the high-pressure system is reached, the first channel and the second channel of the integrated water heater are controlled to be opened.

4) The method comprises the steps of controlling the compressor to start, driving refrigerant in a refrigeration loop and a first channel of the electric automobile to flow, controlling a high-pressure system refrigeration driver to start, and driving a first cooling medium in a high-pressure system cooling loop and a second channel to flow after the high-pressure system refrigeration driver is started.

5) And returning to the step 1) until the temperature of each high-voltage line terminal of the high-voltage system of the electric automobile does not reach the cooling starting condition of the high-voltage system, and controlling the refrigeration driver of the high-voltage system to maintain the starting state.

6) The state of charge of the battery is detected, and it is determined whether a charge end condition is reached according to the state of charge of the battery.

7) When it is determined that the end-of-charge condition is reached, the compressor and the high-pressure system refrigerant driver are controlled to shut down.

8) And when the quick charging is detected to be started, the inlet and outlet temperatures of the battery are obtained, and whether the battery cooling starting condition is met or not is determined according to the inlet and outlet temperatures of the battery.

9) And when the battery cooling starting condition is determined to be met according to the inlet and outlet temperatures of the battery, the first channel and the third channel of the integrated water heater are controlled to be opened, and the port 1 and the port 2 of the three-way valve are controlled to be communicated.

10) And controlling the compressor to start, driving a refrigerant in a refrigeration loop of the electric automobile to flow, controlling the battery refrigeration driver to start, and driving a second cooling medium in the third channel and the battery cooling loop to flow after the battery refrigeration driver is started.

11) And judging whether the preset temperature requirement is met or not according to the inlet and outlet temperature of the battery, and controlling the battery refrigeration driver to be closed when the preset temperature requirement is determined to be met.

12) And when the battery cooling starting condition is not met according to the inlet and outlet temperatures of the battery, controlling the battery refrigeration driver and the three-way valve to maintain the original state.

According to the cooling control method of the electric automobile, the first channel, the second channel and the third channel are arranged, heat exchange is carried out through the first channel and the second channel, heat exchange is carried out through the first channel and the third channel, the cooling temperature of the refrigerant in the first channel is conducted to the second channel and the third channel, the heat productivity of each high-voltage wire terminal in the quick charging process of the electric automobile is taken away in time through the cooling medium in the second channel, the heat productivity of the battery in the expansion process of the electric automobile is taken away in time through the cooling medium in the third channel, the high-voltage system of the electric automobile and the temperature of the battery are reduced, further, damage to each part of the electric automobile can be avoided, and normal and stable operation of the electric automobile is guaranteed.

It should be understood that, although the steps in the flowcharts related to the above embodiments are shown in sequence as indicated by the arrows, the steps are not necessarily executed in sequence as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a part of the steps in each flowchart related to the above embodiments may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least a part of the steps or stages in other steps.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware related to instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.