阅读说明：本技术 一种热管理系统、车辆和控制方法 (Thermal management system, vehicle and control method ) 是由 朱辉 于 2020-05-28 设计创作，主要内容包括：本发明公开了一种热管理系统、车辆和控制方法。热管理系统包括电池组、驱动装置、冷却系统和制热系统,驱动装置驱动第一介质进入电池组的管路中,冷却系统包括冷凝装置、第一冷却支路和第二冷却支路,第一冷却支路和第二冷却支路均与冷凝装置连通,第一冷却支路包括蒸发装置和第一膨胀阀,在第一膨胀阀的打开状态中,蒸发装置与冷凝装置连通,第二冷却支路包括换热装置和第二膨胀阀,在第二膨胀阀的打开状态中,换热装置和冷凝装置连通,制热系统包括第一加热装置,第一加热装置与换热装置并联,第一加热装置和换热装置通过第三阀与电池组的管路连通。根据本发明的热管理系统,对电池组进行加热或者制冷,也可以根据实际环境对空气进行制冷。(The invention discloses a thermal management system, a vehicle and a control method. The heat management system comprises a battery pack, a driving device, a cooling system and a heating system, wherein the driving device drives a first medium to enter a pipeline of the battery pack, the cooling system comprises a condensing device, a first cooling branch and a second cooling branch, the first cooling branch and the second cooling branch are both communicated with the condensing device, the first cooling branch comprises an evaporating device and a first expansion valve, the evaporating device is communicated with the condensing device in an opening state of the first expansion valve, the second cooling branch comprises a heat exchange device and a second expansion valve, the heat exchange device is communicated with the condensing device in an opening state of the second expansion valve, the heating system comprises a first heating device, the first heating device is connected with the heat exchange device in parallel, and the first heating device and the heat exchange device are communicated with the pipeline of the battery pack through a third valve. According to the heat management system, the battery pack is heated or cooled, and air can be cooled according to the actual environment.)

1. A thermal management system, comprising:

the system comprises a battery pack and a driving device, wherein the driving device drives a first medium into a pipeline of the battery pack, and the first medium is used for adjusting the temperature of the battery pack;

the cooling system comprises a condensing device, a compressor, a first cooling branch and a second cooling branch, the first cooling branch and the second cooling branch are both communicated with the condensing device,

the first cooling branch comprises an evaporation device and a first expansion valve, the first expansion valve is arranged between the condensation device and the evaporation device, and the evaporation device is communicated with the condensation device in an opening state of the first expansion valve; and

the second cooling branch comprises a heat exchange device and a second expansion valve, the heat exchange device is communicated with a pipeline of the battery pack, the second expansion valve is arranged between the condensing device and the evaporating device, and the heat exchange device is communicated with the condensing device in an opening state of the second expansion valve; and

a heating system comprising a first heating device in parallel with the heat exchange device, and the first heating device and the heat exchange device are in communication with the piping of the battery pack through a third valve.

2. The thermal management system of claim 1, wherein an inlet end of the third valve is in communication with an outlet end of the line of the battery pack, a first outlet end of the third valve is in communication with a first inlet end of the heat exchange device, and a second outlet end of the third valve is in communication with an inlet end of the first heating device;

in a first open state of the third valve, the heat exchange device is in communication with the line of the battery pack;

in a second open state of the third valve, the first heating device is in communication with the line of the battery pack.

3. The thermal management system of claim 1, further comprising a second heating device disposed side-by-side with the evaporation device for heating air within the chamber.

4. The thermal management system of claim 1, further comprising a liquid level sensor disposed in the condensing device to detect an amount of the second medium in the condensing device.

5. The thermal management system of claim 1, further comprising a battery temperature sensor disposed in the battery pack to detect a temperature of the battery pack.

6. The thermal management system of any of claims 1-5, further comprising a controller electrically connected to each device to control operation of each device.

7. A vehicle, characterized in that the vehicle comprises a thermal management system according to any of claims 1-6.

8. A control method for a thermal management system according to any of claims 1-6, comprising:

judging whether to start the compressor, the condensing device and the first expansion valve according to the outdoor temperature;

judging whether to open the first heating device, the condensing device and the second expansion valve according to the outdoor temperature and the requirement of the battery pack;

if the first heating device is started, matching the state of the first heating device according to the temperature of the first medium;

and if the second expansion valve and the condensing device are opened, matching the opening degree of the second expansion valve or the power of the compressor or the power of the condensing device according to the temperature of the first medium.

9. The control method according to claim 8, wherein the thermal management system further comprises a level sensor for detecting a level of the second medium in the condensation device,

a self-test is performed after the thermal management system is powered on,

if the self-checking is abnormal, a fault alarm is carried out;

if the self-checking is normal, the compressor and the condensing device are ready to work, and whether the liquid level of the second medium is normal or not is judged;

if the liquid level is abnormal, a fault alarm is carried out;

if the liquid level is normal and the battery pack sends a starting signal, judging whether the driving device operates normally;

if the driving device is not operated normally, a fault alarm is carried out;

if the driving device runs normally, different devices are respectively started according to different outdoor temperatures and the requirements of the battery pack;

after the different devices are operated, the operation is cycled to the self-checking step.

10. The control method according to claim 8 or 9, wherein the thermal management system further comprises a second heating device, the second heating device is used for heating indoor air, and whether the second heating device is started or not is judged according to outdoor temperature.

Technical Field

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

Background

The conventional thermal management system usually provides a cooling medium for the battery pack, but the conventional thermal management system cannot well adjust the temperature of the cooling medium, so that the cooling medium cannot adapt to various working conditions and environments in time, and the problems of untimely response, energy waste and the like are easily caused.

Accordingly, there is a need to provide a thermal management system, a vehicle and a control method to at least partially address the above-mentioned problems.

Disclosure of Invention

In this summary, concepts in a simplified form are introduced that are further described in the detailed description. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

To at least partially solve the above problem, according to a first aspect of the present invention, there is provided a thermal management system comprising:

the system comprises a battery pack and a driving device, wherein the driving device drives a first medium into a pipeline of the battery pack, and the first medium is used for adjusting the temperature of the battery pack;

the cooling system comprises a condensing device, a compressor, a first cooling branch and a second cooling branch, the first cooling branch and the second cooling branch are both communicated with the condensing device,

the first cooling branch comprises an evaporation device and a first expansion valve, the first expansion valve is arranged between the condensation device and the evaporation device, and the evaporation device is communicated with the condensation device in an opening state of the first expansion valve; and

the second cooling branch comprises a heat exchange device and a second expansion valve, the heat exchange device is communicated with a pipeline of the battery pack, the second expansion valve is arranged between the condensing device and the evaporating device, and the heat exchange device is communicated with the condensing device in an opening state of the second expansion valve; and

a heating system comprising a first heating device in parallel with the heat exchange device, and the first heating device and the heat exchange device are in communication with the piping of the battery pack through a third valve.

According to the heat management system, the heat management system comprises a battery pack, a cooling system and a heating system, the heating system comprises a first heating device, the cooling system comprises a condensing device, a compressor, a first cooling branch and a second cooling branch, the first cooling branch comprises an evaporating device and a first expansion valve, the second cooling branch comprises a heat exchange device and a second expansion valve, the evaporating device is communicated with the condensing device in an opening state of the first expansion valve, the heat exchange device is communicated with the condensing device in an opening state of the second expansion valve, the first heating device is connected with the heat exchange device in parallel, and the first heating device and the heat exchange device are communicated with a pipeline of the battery pack through a third valve. Like this, can in time heat or refrigerate the group battery respectively according to the actual conditions of group battery, also can refrigerate the air according to actual environment, avoid the waste of the energy, the response is timely, has avoided the high or low excessively of temperature of group battery, has improved the security.

Optionally, an inlet end of the third valve is communicated with an outlet end of the piping of the battery pack, a first outlet end of the third valve is communicated with a first inlet end of the heat exchange device, and a second outlet end of the third valve is communicated with an inlet end of the first heating device;

in a first open state of the third valve, the heat exchange device is in communication with the line of the battery pack;

in a second open state of the third valve, the first heating device is in communication with the line of the battery pack.

Optionally, the air conditioner further comprises a second heating device, wherein the second heating device is arranged side by side with the evaporation device and is used for heating indoor air.

Optionally, the thermal management system further comprises a liquid level sensor disposed in the condensing device to detect an amount of the second medium in the condensing device.

Optionally, the thermal management system further comprises a battery temperature sensor disposed in the battery pack to detect a temperature of the battery pack.

Optionally, a controller is included, the controller being electrically connected to each device to control the operation of each device.

The invention also provides a vehicle comprising the thermal management system.

According to the vehicle provided by the invention, the vehicle comprises a thermal management system, the thermal management system comprises a battery pack, a cooling system and a heating system, the heating system comprises a first heating device, the cooling system comprises a condensing device, a compressor, a first cooling branch and a second cooling branch, the first cooling branch comprises an evaporating device and a first expansion valve, the second cooling branch comprises a heat exchange device and a second expansion valve, the evaporating device is communicated with the condensing device in the opening state of the first expansion valve, the heat exchange device is communicated with the condensing device in the opening state of the second expansion valve, the first heating device is connected with the heat exchange device in parallel, and the first heating device and the heat exchange device are communicated with a pipeline of the battery pack through a third valve. Like this, can in time heat or refrigerate the group battery respectively according to the actual conditions of group battery, also can refrigerate the air according to actual environment, avoid the waste of the energy, the response is timely, has avoided the high or low excessively of temperature of group battery, has improved the security.

The invention also provides a control method for the thermal management system, which comprises the following steps:

judging whether to start the compressor, the condensing device and the first expansion valve according to the outdoor temperature;

judging whether to open the first heating device, the condensing device and the second expansion valve according to the outdoor temperature and the requirement of the battery pack;

if the first heating device is started, matching the state of the first heating device according to the temperature of the first medium;

and if the second expansion valve and the condensing device are opened, matching the opening degree of the second expansion valve or the power of the compressor or the power of the condensing device according to the temperature of the first medium.

The control method is used for a heat management system, the heat management system comprises a battery pack, a cooling system and a heating system, the heating system comprises a first heating device, the cooling system comprises a condensing device, a compressor, a first cooling branch and a second cooling branch, the first cooling branch comprises an evaporating device and a first expansion valve, the second cooling branch comprises a heat exchange device and a second expansion valve, the evaporating device is communicated with the condensing device in the opening state of the first expansion valve, the heat exchange device is communicated with the condensing device in the opening state of the second expansion valve, the first heating device is connected with the heat exchange device in parallel, and the first heating device and the heat exchange device are communicated with a pipeline of the battery pack through a third valve. Like this, carry out integrated control to the temperature of group battery and the temperature to the air, can in time can heat or refrigerate the group battery respectively according to the actual conditions of group battery, also can refrigerate the air according to actual environment, avoided the waste of the energy, the response is timely, has avoided the high or low excessively of temperature of group battery, has improved the security.

Optionally, the thermal management system further comprises a level sensor for detecting a level of the second medium in the condensation device,

a self-test is performed after the thermal management system is powered on,

if the self-checking is abnormal, a fault alarm is carried out;

if the self-checking is normal, the compressor and the condensing device are ready to work, and whether the liquid level of the second medium is normal or not is judged;

if the liquid level is abnormal, a fault alarm is carried out;

if the liquid level is normal and the battery pack sends a starting signal, judging whether the driving device operates normally;

if the driving device is not operated normally, a fault alarm is carried out;

if the driving device runs normally, different devices are respectively started according to different outdoor temperatures and the requirements of the battery pack;

after the different devices are operated, the operation is cycled to the self-checking step.

Optionally, the thermal management system further includes a second heating device, where the second heating device is configured to heat indoor air, and determine whether to turn on the second heating device according to an outdoor temperature.

Drawings

The following drawings of the invention are included to provide a further understanding of the invention. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles and apparatus of the invention. In the drawings, there is shown in the drawings,

FIG. 1 is a flow chart of a thermal management system according to a preferred embodiment of the present invention;

FIG. 2 is a logic diagram of a control method for the thermal management system shown in FIG. 1;

FIG. 3 is a logic diagram of a first sub-flow of the control method shown in FIG. 2;

FIG. 4 is a logic diagram of a second sub-flow of the control method shown in FIG. 2;

FIG. 5 is a logic diagram of a third sub-flow of the control method shown in FIG. 2;

FIG. 6 is a logic diagram of a fourth sub-flow of the control method shown in FIG. 2;

FIG. 7 is a logic diagram of a fifth sub-flow of the control method shown in FIG. 2; and

fig. 8 is a logic diagram of a sixth sub-flow of the control method shown in fig. 2.

Description of reference numerals:

100: the thermal management system 111: battery pack

112: the heat exchange device 113: first heating device

114: the driving device 121: evaporation device

122: second heating device 131: condensing unit

132: the compression device 141: first expansion valve

142: second expansion valve 143: third valve

144: fourth valve 145: inlet end of third valve

146: first outlet end of third valve 147: second outlet end of third valve

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.

In the following description, for purposes of explanation, specific details are set forth in order to provide a thorough understanding of the present invention. It is apparent that the practice of the invention is not limited to the specific details set forth herein as are known to those of skill in the art. The following detailed description of the preferred embodiments of the present invention, however, the present invention may have other embodiments in addition to the detailed description, and should not be construed as being limited to the embodiments set forth herein.

It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention, as the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. When the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The terms "upper", "lower", "front", "rear", "left", "right" and the like as used herein are for purposes of illustration only and are not limiting.

Ordinal words such as "first" and "second" are referred to herein merely as labels, and do not have any other meaning, such as a particular order, etc. Also, for example, the term "first component" does not itself imply the presence of "second component", and the term "second component" does not itself imply the presence of "first component".

In the following, specific embodiments of the present invention will be described in more detail with reference to the accompanying drawings, which illustrate representative embodiments of the invention and do not limit the invention.

The invention provides a thermal management system which can be used in various working conditions and environments.

Specifically, as shown in FIG. 1, thermal management system 100 includes a battery pack 111, and battery pack 111 may power the vehicle. The thermal management system further comprises a pipeline for exchanging heat with the battery pack 111, wherein a first medium is arranged in the pipeline, and the first medium can exchange heat with the battery pack to regulate the temperature of the battery pack. Thermal management system 100 also includes a controller that may be electrically connected to battery pack 111 to detect the temperature of battery pack 111 in real time.

The thermal management system 100 also includes a drive device 114, and the drive device 114 may drive the first medium into the tubes of the battery pack. The drive device 114 may be configured as a water pump to drive the flow of the first medium into the lines of the battery 111. Thereby improving efficiency. The controller is electrically connected to the driving device 114 to control the on, off and operating states of the driving device 114.

Further, the thermal management system further includes a cooling system for reducing the temperature of battery pack 111, and a heating system for increasing the temperature of battery pack 111. Specifically, the cooling system includes a condensing device 131, a compressor 132, a first cooling branch and a second cooling branch, both of which are in communication with the condensing device 131. The first cooling branch is used for reducing the temperature of air, and the second cooling branch is used for reducing the temperature of the first medium. The heating system comprises a first heating device for increasing the temperature of the first medium.

A compressor 132 is arranged upstream of the condensing device 131, an inlet end of the compressor 132 is communicated with outlet ends of the heat exchanging device 112 and the evaporating device 121, and the second medium from the heat exchanging device 112 and the evaporating device 121 can enter the compressor 132. The controller may be electrically connected to the compressor 132 to control the operation of the compressor 132.

The following describes the means for regulating the temperature of the first medium.

The second cooling branch includes a heat exchanging device 112 and a second expansion valve 142, and the heat exchanging device 112 may communicate with a cooling line for exchanging heat with the battery pack 111 for cooling the first medium.

The condensing device 131 may communicate with the heat exchanging device 112, and the second medium discharged from the condensing device 131 may enter the heat exchanging device 112. The temperature of the second medium in the heat exchanging means 112 is lower than the temperature of the first medium, which can cool the first medium. The condensing unit 131 may include an electronic fan and a condenser to improve cooling efficiency. The controller may be electrically connected to the condensing unit 131 to control the operation of the condensing unit 131.

The heat exchanging device 112 may be configured as a plate heat exchanger to have a good heat exchanging efficiency. The heat exchanging device 112 includes a first inlet end and a first outlet end, the first inlet end of the heat exchanging device 112 is communicated with the outlet end of the pipe of the battery pack 111, and the first outlet end of the heat exchanging device 112 is communicated with the inlet end of the pipe of the battery pack 111. The first medium from the battery pack 111 enters the heat exchange device 112 through the first inlet end, the heat exchange device 112 reduces the temperature of the first medium, and the first medium with the reduced temperature flows back to the battery pack 111 to circularly flow, so that the temperature of the battery pack 111 is reduced.

The second expansion valve 142 is disposed between the heat exchanging device 112 and the condensing device 131. The controller may be electrically connected to the second expansion valve 142 to control the opening and closing of the second expansion valve 142 and the opening degree of the second expansion valve 142. The second expansion valve 142 includes an inlet end and an outlet end, the inlet end of the second expansion valve 142 communicates with the outlet end of the condensing device 131, and the outlet end of the second expansion valve 142 communicates with the inlet end of the heat exchanging device 112. In the open state of the second expansion valve 142, the heat exchange device 112 and the condensing device 131 are communicated, and the second medium flowing out of the condensing device 131 flows through the second expansion valve 142, is throttled and enters the heat exchange device 112.

The heat exchanging device 112 comprises a second inlet end and a second outlet end, the second inlet end of the heat exchanging device 112 is communicated with the outlet end of the condensing device 131, and the second outlet end of the heat exchanging device 112 is communicated with the inlet end of the condensing device 131. The second medium throttled by the second expansion valve 142 enters the heat exchange device 112 through the second inlet port to exchange heat with the first medium in the heat exchange device 112.

The first medium from the battery pack 111 enters the heat exchange device 112 via a first inlet end of the heat exchange device 112, and the second medium from the condensing device 131 enters the heat exchange device 112 via a second inlet end of the heat exchange device 112. The second medium reduces the temperature of the first medium so that the temperature of the first medium is reduced and the temperature of the second medium is increased. The second medium with the increased temperature is returned to the condensing unit 131 to circulate.

The first heating device 113 may be in communication with a pipe of the battery pack 111 for heating the first medium. The first heating device 113 may be an electric heating device to facilitate heating of the first medium. The first heating device 113 may be configured as a PTC (Positive Temperature Coefficient thermistor) to maintain the adjusted Temperature of the first medium within a relatively stable range. Alternatively, a controller may be electrically connected to the first heating device 113, and the controller may control the operation of the first heating device 113, such as the controller may control the turning on, turning off, and power of the first heating device 113.

The first heating device 113 and the heat exchanging device 112 are connected in parallel. The first heating device 113 includes an inlet end and an outlet end, the inlet end of the first heating device 113 is communicated with the outlet end of the pipe of the battery pack 111, and the outlet end of the first heating device 113 is communicated with the inlet end of the pipe of the battery pack 111. The first medium from the battery pack 111 can directly enter the first heating device 113, the heat exchange device 112 increases the temperature of the first medium, and the first medium with the increased temperature directly flows back to the battery pack 111 to circularly flow, so that the heating efficiency is higher, and the battery pack 111 is directly heated.

In this way, the first heating device 113 and the heat exchanging device 112 are used independently of each other without interfering with each other. The first heating device 113 and the heat exchanging device 112 are communicated with the pipeline of the battery pack through a third valve. First medium can both can cool off group battery 111 according to actual conditions, can heat group battery 111 again for group battery 111 homoenergetic normal use in the operating mode and the environment of difference has realized the cyclic utilization of the energy, avoids extravagant.

Third valve 143 is disposed downstream of stack 111 and upstream of heat exchange device 112 and first heating device 113. The third meal may be configured as an electronic three-way valve. A controller may be electrically connected to third valve 143 to control the opening and closing of third valve 143 and the degree of opening of third valve 143. In the open state of third valve 143, the piping of battery pack 111 may communicate with heat exchanging device 112 and first heating device 113 through third valve 143, respectively.

It is understood that downstream of the heat exchanging device 112 and the first heating device 113, a fourth valve 144 is further provided, the fourth valve 144 also being configured as an electronic three-way valve, so that the first medium from the heat exchanging device 112 or the first heating device 113 can flow back to the battery pack 111, respectively. The structure of the fourth valve 144 is the same as that of the third valve 143, and will not be described herein. When cooling/heating requirements of the battery pack 111 are met, the heat exchanging device 112 and the first heating device 113 can be respectively communicated with the pipeline of the battery pack 111, so as to respectively cool or heat the battery pack 111.

Specifically, third valve 143 includes an inlet end 145, a first outlet end 146, and a second outlet end 147, inlet end 145 of third valve 143 communicating with the outlet end of the tubing of stack 111, first outlet end 146 of third valve 143 communicating with the first inlet end of heat exchange device 112, and second outlet end 147 of third valve 143 communicating with the inlet end of first heating device 113. In this way, both the heat exchanging device 112 and the first heating device 113 can be connected to the battery pack 111 to heat or cool the first medium.

Thus, when the temperature of battery pack 111 is high, that is, when battery pack 111 issues a cooling signal demand, the controller controls third valve 143 to be in the first open state. In the first open state of third valve 143, heat exchange device 112 may be in communication with the tubing of cell stack 111, i.e. inlet end 145 of third valve 143 and first outlet end 146 of third valve 143, and a first medium may enter heat exchange device 112. The condensing means 131 is activated and in the open state of the second expansion valve 142 the second medium may enter the heat exchanging means 112. In the heat exchanging device 112, the second medium cools the first medium, and the cooled first medium flows back to the battery pack 111, thereby reducing the temperature of the battery pack 111.

When the temperature of the battery pack 111 is low, that is, when the battery pack 111 generates a heating signal request, the controller controls the third valve 143 to be in the second open state. In the second open state of third valve 143, first heating device 113 may be in communication with the line of battery pack 111, i.e. inlet end 145 of third valve 143 and second outlet end 147 of third valve 143, and first medium may enter first heating device 113. At this time, the second expansion valve 142 is closed. The first heating device 113 heats the first medium, and the first medium heated up is returned to the battery pack 111, thereby raising the temperature of the battery pack 111.

An apparatus for adjusting the temperature of air, i.e., an indoor air conditioning system, is described below.

The first cooling branch includes an evaporation device 121 and a first expansion valve, and the evaporation device 121 may communicate with the condensation device 131. The evaporation apparatus 121 may be used to reduce the temperature of air to provide cool air indoors. The second medium may enter the evaporation device 121, and the second medium may exchange heat with the indoor air to lower the temperature of the indoor air. The temperature of the second medium in the evaporation means 121 is lower than the temperature of the air. The evaporation apparatus 121 includes an evaporator and an electronic fan for improving heat exchange efficiency. The controller may be electrically connected to the electronic fan to control the operation of the electronic fan.

In the open state of the first expansion valve 141, the evaporation device 121 and the condensation device 131 are in communication, and the second medium discharged by the condensation device 131 may enter the evaporation device 121 via the first expansion valve 141. In this way, when the outdoor temperature is high, the evaporation device 121 and the condensation device 131 are activated, and the second medium enters the evaporation device 121 to cool the air, so that the cooled air enters the indoor space (inside the vehicle), thereby reducing the temperature of the indoor space (inside the vehicle).

According to the heat management system, the heat management system comprises a battery pack, a cooling system and a heating system, the heating system comprises a first heating device, the cooling system comprises a condensing device, a compressor, a first cooling branch and a second cooling branch, the first cooling branch comprises an evaporating device and a first expansion valve, the second cooling branch comprises a heat exchange device and a second expansion valve, the evaporating device is communicated with the condensing device in an opening state of the first expansion valve, the heat exchange device is communicated with the condensing device in an opening state of the second expansion valve, the first heating device is connected with the heat exchange device in parallel, and the first heating device and the heat exchange device are communicated with a pipeline of the battery pack through a third valve. Like this, can in time heat or refrigerate to group battery 111 respectively according to group battery 111's actual conditions, also can refrigerate the air according to actual environment, avoid the waste of the energy, the response is timely, has avoided group battery 111's high temperature or low excessively, has improved the security.

In addition, the first expansion valve and the second expansion valve not only play a role of throttling, but also play a role of opening and closing, and different loops are communicated through opening or closing of the first expansion valve and the second expansion valve, so that the system is simpler and has higher reliability.

Further, the thermal management system 100 also includes a second heating device 122, and the second heating device 122 may be used to heat the air in the room. The second heating device 122 may be configured as an electric heating device, for example, the second heating device 122 may be a resistance heater, which is convenient and fast. The second heating device 122 is arranged side by side with the evaporation device 121. The second heating device 122 may be configured as a PTC (Positive Temperature Coefficient thermistor) to maintain the Temperature of the conditioned air within a relatively stable interval range. The controller may be electrically connected to the second heating device 122 to control the turning on and off of the second heating device 122 and the temperature of the heated air.

Thus, when the outdoor temperature is low, the evaporation device 121 and the condensation device 131 are turned off, and the second heating device 122 is turned on. The second heating device 122 heats the air so that the heated air enters the room (inside the vehicle), thereby increasing the temperature of the room (inside the vehicle).

Optionally, the thermal management system 100 further comprises a liquid level sensor arranged in the condensation device 131 to detect the amount of cooling medium in the condensation device 131. The controller may be electrically connected to a level sensor, which may feed back the detected amount of cooling medium to the controller. And if the quantity of the cooling medium detected by the liquid level sensor is abnormal, the controller performs low liquid level alarm, so that the maintenance is further performed.

Optionally, the thermal management system 100 further comprises a battery temperature sensor disposed in the battery pack 111 to detect the temperature of the battery pack 111. The controller may be electrically connected with a battery temperature sensor, which may feed back the detected temperature of the battery pack 111 to the controller, so that the controller controls the opening or closing of the third valve 143 and the opening or closing of the first heating device 113, and the signal transmission is more accurate and reliable.

Thermal management system 100 also includes an outdoor temperature sensor to detect outdoor (offboard) temperatures. The outdoor temperature sensor can be electrically connected with the controller, the outdoor temperature sensor can feed back the detected outdoor (outside) temperature to the controller, and the controller controls the operation of each device according to the outdoor temperature.

The thermal management system 100 also includes an indoor temperature sensor to detect an indoor (in-vehicle) temperature. The indoor temperature sensor may be electrically connected to the controller, and the indoor temperature sensor may feed back the detected indoor (in-vehicle) temperature to the controller, which controls the operation of each device according to the indoor temperature.

The evaporation device 121 and the heat exchange device 112 share one condensation device 131, so that the cost, the space and the weight are saved. Furthermore, the evaporation device 121, the heat exchange device 112, the first heating device 113 and the second heating device 122 share one controller, and the controller can control the adjustment of the temperature of the battery pack 111 and the adjustment of the controlled temperature, so that the cost, the space and the weight are saved, the space utilization rate of the whole vehicle is improved, and the controller has a fault alarm function and improves the functional safety.

Furthermore, the first expansion valve, the second expansion valve, the first heating device and the second heating device are all independently arranged, various independent working conditions of indoor (in-vehicle) and battery heat management can be met simultaneously, the first expansion valve and the second expansion valve play a role in opening and closing while playing a throttling role, and the system is simpler and more reliable.

The invention also provides a vehicle comprising the thermal management system 100 described above.

According to the vehicle provided by the invention, the vehicle comprises a thermal management system, the thermal management system comprises a battery pack, a cooling system and a heating system, the heating system comprises a first heating device, the cooling system comprises a condensing device, a compressor, a first cooling branch and a second cooling branch, the first cooling branch comprises an evaporating device and a first expansion valve, the second cooling branch comprises a heat exchange device and a second expansion valve, the evaporating device is communicated with the condensing device in the opening state of the first expansion valve, the heat exchange device is communicated with the condensing device in the opening state of the second expansion valve, the first heating device is connected with the heat exchange device in parallel, and the first heating device and the heat exchange device are communicated with a pipeline of the battery pack through a third valve. Like this, can in time heat or refrigerate the group battery respectively according to the actual conditions of group battery, also can refrigerate the air according to actual environment, avoid the waste of the energy, the response is timely, has avoided the high or low excessively of temperature of group battery, has improved the security, and the system is simple reliable simultaneously.

The operation of thermal management system 100 in different ambient temperatures and different operating conditions is described below.

1) When the outdoor (outside vehicle) temperature is too low: the outdoor temperature sensor feeds back the detected outdoor temperature (outside the vehicle) to the controller, when the controller judges that the outdoor temperature (outside the vehicle) is too low, the controller controls the first expansion valve 141 to be closed, and the controller sends a control signal to the second heating device 122, and the second heating device 122 is opened, so that the air entering the room (inside the vehicle) is heated. The air conditioning system of the vehicle is in a heating working state.

i) When the temperature of the battery pack 111 is too high, the battery temperature sensor feeds back the detected temperature of the battery pack 111 to the controller, and the battery pack 111 sends a cooling demand to the controller. The controller controls the condensing device 131, the second expansion valve 142, the compressor 132 and the driving device 114 to be opened, and the condensing device 131 outputs the second medium to the heat exchanging device 112, so that the second medium cools the first medium, and the cooled first medium cools the battery pack 111.

ii) when the temperature of the battery pack 111 is too low, the battery temperature sensor feeds back the detected temperature of the battery pack 111 to the controller, and the battery pack 111 sends a heating demand to the controller. The controller controls the condensing means 131, the compressor 132 and the second expansion valve 142 to be closed, and the controller controls the first heating means 113 and the driving means 114 to be activated. The first heating device 113 is a first medium, and the heated first medium is used for heating the battery pack 111. When the temperature of the battery pack 111 rises to a predetermined temperature, the controller may control the second expansion valve 142 to be opened to prevent the subsequent battery pack 111 from being excessively high in temperature.

2) When the outdoor (outside vehicle) temperature is appropriate: the outdoor temperature sensor feeds back the detected outdoor temperature to the controller, and when the controller determines that the outdoor temperature is appropriate, the controller controls both the first expansion valve 141 and the second heating device 122 to be closed. The air conditioning system of the vehicle does not operate. In order to make the outdoor (outside of the vehicle) air flow smoothly, the controller may control the electronic fan of the evaporation device 121 to be turned on, so as to ventilate the indoor (inside of the vehicle).

i) When the temperature of the battery pack 111 is too high, the battery temperature sensor feeds back the detected temperature of the battery pack 111 to the controller, and the battery pack 111 sends a cooling demand to the controller. The controller controls the opening of the condensing unit 131, the second expansion valve 142, the compressor 132 and the driving unit 114, and the condensing unit 131 outputs the second medium to the heat exchanging unit 112. The second medium cools the first medium, so that the cooled first medium cools the battery pack 111.

ii) when the temperature of the battery pack 111 is too low, the battery temperature sensor feeds back the detected temperature of the battery pack 111 to the controller, and the battery pack 111 sends a heating demand to the controller. The controller controls the condensing means 131, the compressor 132 and the second expansion valve 142 to be closed, and the controller controls the first heating means 113 and the driving means 114 to be activated. The first heating device 113 is a first medium, and the heated first medium is used for heating the battery pack 111.

3) When the outdoor (outside vehicle) temperature is too high: the outdoor temperature sensor feeds back the detected outdoor (outside of the vehicle) temperature to the controller, and when the controller judges that the outdoor (outside of the vehicle) temperature is excessively high, the controller controls the condensing device 131, the first expansion valve 141, and the compressor 132 to be turned on, and the controller controls the second heating device 122 to be turned off. The condensing device 131 outputs the second medium to the evaporating device 121 so that the second medium cools the air.

i) When the temperature of the battery pack 111 is too high, the battery temperature sensor feeds back the detected temperature of the battery pack 111 to the controller, and the battery pack 111 sends a cooling demand to the controller. The controller also controls the second expansion valve 142, the compressor 132 and the driving device 114 to be opened, and the condensing device 131 outputs the second medium to the heat exchanging device 112, so that the second medium cools the first medium, and thus the cooled first medium cools the battery pack 111.

ii) when the temperature of the battery pack 111 is too low, the battery temperature sensor feeds back the detected temperature of the battery pack 111 to the controller, and the battery pack 111 sends a heating demand to the controller. The controller controls the second expansion valve 142 to be closed, and the controller controls the first heating device 113 and the driving device 114 to be activated. The first heating device 113 heats the first medium, and the heated first medium is used to heat the battery pack 111.

The present invention also provides a control method for the thermal management system 100 described above.

The control method of the thermal management system 100 is generally described below.

As shown in fig. 2, the vehicle is started by the driver and the vehicle is powered on. Each device performs self-testing.

Alternatively, after the vehicle is powered on, the thermal management system 100 is powered on, each device is powered on and self-tested, and whether the condensing device 131, the compressor 132, the first heating device 113, the second heating device 122, and each valve can be successfully powered on and can operate normally is checked.

If any one of the condensing unit 131, the compressor 132, the first heating unit 113, the second heating unit 122, and the valves is abnormally self-checked, a malfunction alarm is performed to further perform maintenance.

If the self-checking of the condensing unit 131, the compressor 132, the first heating unit 113, the second heating unit 122, and the valves is normal, the condensing unit 131 and the compressor 132 may be ready to start working and transmit the whole vehicle message.

It is detected and judged whether the level of the second medium in the condensing means 131 is normal.

Be provided with level sensor among the condensing equipment 131, level sensor can detect the liquid level of the second medium among the condensing equipment 131, judges whether the volume of second medium is sufficient in order to satisfy cryogenic demand.

If the liquid level is abnormal, fault alarm is carried out, and low liquid level alarm can be carried out so as to further overhaul.

If the liquid level is normal, it is checked whether the water pump (the driving device 114) can operate normally.

The battery pack 111 may send a start signal to the controller, which detects and determines whether the water pump is operating properly.

The controller is electrically connected with the water pump, detects and judges whether the water pump can normally operate, for example, detects whether the duty ratio of the water pump reaches 100%.

And if the water pump cannot normally operate, performing fault alarm on the water pump.

If the water pump can normally operate, different devices are respectively started according to different outdoor temperatures and the requirements of the battery pack.

Thus, malfunctions in the operation of the respective devices can be avoided.

Fig. 3 to 8 show the flow of different devices that are turned on and/or off according to different outdoor temperatures and different battery pack requirements.

As shown in fig. 3, whether to open the first expansion valve and the second heating device is judged according to whether the outdoor (outside of the vehicle) temperature is less than a predetermined temperature value, and whether to open the first heating device, the condensing device, and the second expansion valve is judged according to the demand of the battery pack. For example, the predetermined temperature value may be 19 ℃, and when the outdoor (outside of the vehicle) temperature is less than 19 ℃, and the battery pack 111 sends a heating signal request to the controller, it is determined whether other devices are in an operating state, such as on or off.

The vehicle is provided with an outdoor temperature sensor that detects the outdoor (outside of the vehicle) temperature. When the outdoor (outside) temperature is <19 ℃, the outdoor temperature sensor feeds back a signal to the controller.

Meanwhile, when the battery pack 111 needs to be heated, the battery pack 111 sends a heating signal demand to the controller.

The controller detects: i) whether the compressor 132 and the condensing unit 131 are turned off; ii) whether the first expansion valve 141 and the second expansion valve 142 are closed; iii) whether the second heating device 122 is on; iiii) whether the first heating means 113 is on.

The first expansion valve 141 is disposed upstream of the evaporation device 121, and the second expansion valve 142 is disposed upstream of the heat exchange device 112.

When any one of the conditions that the compressor 132 and the condensing device 131 are both opened, the first expansion valve 141 and the second expansion valve 142 are both opened, the second heating device 122 is closed, and the first heating device 113 is closed occurs, a fault information alarm is performed to further perform maintenance, and the process is circulated to the self-inspection step.

If the compressor 132 and the condensing device 131 are both closed, the first expansion valve 141 and the second expansion valve 142 are both closed, the second heating device 122 is opened, and the first heating device 113 is opened, the indoor (in-vehicle) temperature and the battery pack inlet water temperature are detected.

The vehicle is provided with an indoor temperature sensor that detects an indoor (in-vehicle) temperature. The indoor temperature sensor may feed back a signal to the controller.

Meanwhile, the vehicle is provided with a first medium temperature sensor, which may be disposed upstream of the battery pack 111 to detect the temperature of the first medium entering the battery pack 111. The first media temperature sensor may feed back a signal to the controller.

The state of each device is judged according to the indoor (in-vehicle) temperature and the inlet water temperature of the battery pack.

The state of the first heating means 113 is matched according to the battery pack inlet water temperature. Optionally, the operating state and/or power of the first heating means 113 is matched according to whether the battery inlet water temperature falls within a first predetermined range. The operating state may include a start state and a stop state. For example, the first predetermined range is a temperature range greater than 30 ℃, and the operating state and/or power of the first heating device 113 is matched according to whether the battery inlet water temperature is greater than 30 ℃.

Alternatively, the power of the second heating device 122 is matched according to whether the indoor (in-vehicle) temperature falls within a second predetermined range. For example, the second predetermined range is 22 ± 1 ℃, and whether the indoor (in-vehicle) temperature falls within 22 ± 1 ℃ matches the power of the second heating device 122.

And judging the working state of each device according to whether the indoor (in-vehicle) temperature is 22 +/-1 ℃ or not and the water inlet temperature of the battery pack is more than 30 ℃ or not.

If the indoor (in-vehicle) temperature is 22 +/-1 ℃ and the battery inlet water temperature is more than 30 ℃, whether the first heating device 113 stops working or not is judged.

If the first heating means 113 does not stop working, a fault alarm of excessive water temperature is made and the process is circulated to the self-checking step. The temperature of the battery pack inlet water is higher than 30 ℃, the temperature of the battery pack inlet water is further increased due to the continuous operation of the first heating device 113, so that the temperature of the battery pack 111 is too high, and the fault alarm of the too high water temperature is performed at the moment. And then the self-checking step is circulated.

If the first heating device 113 stops working, the process will be circulated to the self-checking step.

If the indoor (in-vehicle) temperature is not 22 ± 1 ℃ and the battery inlet water temperature is higher than 30 ℃, the first heating device 113 stops working, that is, the first heating device 113 is in a stop state, and the second heating device 122 matches the heating power according to the indoor (in-vehicle) temperature. And then the self-checking step is circulated.

If the indoor (in-vehicle) temperature is not 22 +/-1 ℃ and the inlet water temperature of the battery pack is less than or equal to 30 ℃, the first heating device 113 matches the heating power according to the inlet water temperature of the battery pack, and the second heating device 122 matches the heating power according to the indoor (in-vehicle) temperature. And then the self-checking step is circulated.

If the indoor (in-vehicle) temperature is 22 +/-1 ℃ and the inlet water temperature of the battery pack is less than or equal to 30 ℃, the first heating device 113 matches the heating power according to the inlet water temperature of the battery pack, and the second heating device 122 keeps working at a constant power. And then the self-checking step is circulated.

Thus, according to the control method, the battery pack can be heated while air is heated in a low-temperature outdoor environment, the first heating device and the second heating device can be further adjusted according to the indoor temperature and the temperature of the first medium, and the degree of automation is high.

As shown in fig. 4, when the outdoor (outside of the vehicle) temperature is <19 ℃, and the battery pack 111 sends a cooling signal request to the controller, it is determined whether other devices are in an operating state such as on or off.

When the outdoor (outside) temperature is <19 ℃, the outdoor temperature sensor feeds back a signal to the controller. Meanwhile, when the battery pack 111 needs to be cooled, the battery pack 111 sends a cooling signal demand to the controller.

The controller detects: i) whether the compressor 132 and the condensing unit 131 are turned on; ii) whether the first expansion valve 141 is closed and the second expansion valve 142 is open; iii) whether the second heating device 122 is on; iiii) whether the first heating means 113 is switched off.

When any one of the conditions of the compressor 132 and the condensing device 131 being closed, the first expansion valve 141 being opened, the second expansion valve 142 being closed, the second heating device 122 being closed, and the first heating device 113 being opened occurs, a failure information alarm is made to further perform maintenance, and the process is circulated to the self-inspection step.

If the compressor 132 and the condensing device 131 are both opened, the first expansion valve 141 is closed, the second expansion valve 142 is opened, the second heating device 122 is opened, and the first heating device 113 is closed, the indoor (in-vehicle) temperature and the battery pack inlet water temperature are detected.

The indoor temperature sensor may feed back the indoor (in-vehicle) temperature to the controller. Meanwhile, the first medium temperature sensor may feed back the temperature of the first medium to the controller.

And judging the working state of each device according to the indoor (in-vehicle) temperature and the water inlet temperature of the battery pack.

Alternatively, the power of the second heating device 122 is matched according to whether the indoor (in-vehicle) temperature falls within a second predetermined range. For example, the second predetermined range is 22 ± 1 ℃, and whether the indoor (in-vehicle) temperature falls within 22 ± 1 ℃ matches the power of the second heating device 122.

Alternatively, the power of the compressor 132 and the condensing unit 131 may be matched according to whether the battery inlet water temperature falls within a third predetermined range. For example, the third predetermined range is 20 ± 1 ℃, and the inlet temperature of the battery pack is 20 ± 1 ℃ to match the power of the compressor 132 and the condenser 131.

And judging the working state of each device according to whether the indoor (in-vehicle) temperature is 22 +/-1 ℃ or not and the water inlet temperature of the battery pack is 20 +/-1 ℃ or not.

When the indoor (in-vehicle) temperature is 22 ± 1 ℃ and the battery inlet water temperature is 20 ± 1 ℃, the second heating device 122 is operated with constant power, and the condensing device 131 and the compressor 132 are operated with constant power. And then the self-checking step is circulated.

If the indoor (in-vehicle) temperature is not 22 ± 1 ℃ and the battery inlet water temperature is 20 ± 1 ℃, the condensing unit 131 and the compressor 132 are kept working at constant power, and the second heating unit 122 is matched with the heating power according to the indoor (in-vehicle) temperature. And then the self-checking step is circulated.

If the indoor (in-vehicle) temperature is not 22 ± 1 ℃ and the battery inlet water temperature is not 20 ± 1 ℃, the condensing unit 131 and the compressor 132 match the heating power according to the battery inlet water temperature, and the second heating unit 122 matches the heating power according to the indoor (in-vehicle) temperature. And then the self-checking step is circulated.

If the indoor (in-vehicle) temperature is 22 ± 1 ℃ and the battery inlet water temperature is not 20 ± 1 ℃, the condensing unit 131 and the compressor 132 match the power according to the battery inlet water temperature, and the second heating unit 122 keeps operating at a constant power. And then the self-checking step is circulated.

Thus, based on the control method, the air can be heated and the battery pack can be cooled in the low-temperature outdoor environment, the condensing device and the second heating device can be further adjusted according to the indoor temperature and the temperature of the first medium, and the automation degree is high.

As shown in fig. 5, when the outdoor (outside of the vehicle) temperature is <19 ℃, and there is no cooling demand from the battery pack 111, it is determined whether or not other devices are in an operating state such as on or off.

When the outdoor (offboard) temperature is <19 ℃, the outdoor temperature sensor feeds back a signal to the controller and there is no cooling demand on the battery pack 111.

The controller detects: i) whether the compressor 132 and the condensing unit 131 are turned off; ii) whether both the first expansion valve 141 and the second expansion valve 142 are closed; iii) whether the second heating device 122 is on; iiii) whether the first heating means 113 is switched off.

When any one of the conditions that the compressor 132 and the condensing device 131 are both opened, the first expansion valve 141 and the second expansion valve 142 are both opened, the second heating device 122 is closed, and the first heating device 113 is opened occurs, a fault information alarm is performed to further perform maintenance, and the process is circulated to the self-inspection step.

The indoor (in-vehicle) temperature is detected when the compressor 132 and the condensing device 131 are both closed, the first expansion valve 141 and the second expansion valve 142 are both closed, the second heating device 122 is opened, and the first heating device 113 is closed.

The operating state of each device is judged according to the indoor (in-vehicle) temperature.

Alternatively, the power of the second heating device 122 is matched according to whether the indoor (in-vehicle) temperature falls within a second predetermined range. For example, the second predetermined range is 22 ± 1 ℃, and whether the indoor (in-vehicle) temperature falls within 22 ± 1 ℃ matches the power of the second heating device 122.

When the indoor (in-vehicle) temperature is 22 ± 1 ℃, the second heating device 122 keeps working at a constant power. And then the self-checking step is circulated.

When the indoor (in-vehicle) temperature does not fall within 22 ± 1 ℃, the second heating device 122 matches the heating power according to the indoor (in-vehicle) temperature. And then the self-checking step is circulated.

Therefore, based on the control method, the air can be heated in the low-temperature outdoor environment, the second heating device can be further adjusted according to the indoor temperature, and the automation degree is high.

As shown in fig. 6, when the outdoor (outside) temperature is [19, 35) ° c and the battery pack 111 sends a cooling signal request to the controller, it is determined whether other devices are in an operating state such as on or off.

The controller detects: i) whether the compressor 132 and the condensing unit 131 are turned on; ii) whether the first expansion valve 141 and the second expansion valve 142 are open; iii) whether the second heating device 122 is off; iiii) whether the first heating means 113 is switched off.

When any one of the conditions that the compressor 132 and the condensing device 131 are both closed, the first expansion valve 141 and the second expansion valve 142 are both closed, the second heating device 122 is opened, and the first heating device 113 is opened occurs, a fault information alarm is performed to further perform maintenance, and the process is circulated to the self-inspection step.

If the compressor 132 and the condensing device 131 are both opened, the first expansion valve 141 and the second expansion valve 142 are both opened, the second heating device 122 is closed, and the first heating device 113 is closed, the indoor (in-vehicle) temperature and the battery pack inlet water temperature are detected.

The indoor temperature sensor may feed back a signal to the controller. Meanwhile, the first medium temperature sensor may feed back a signal to the controller.

And judging the working state of each device according to the indoor (in-vehicle) temperature and the water inlet temperature of the battery pack.

Alternatively, the opening degree of the second expansion valve 142 and the power of the condensing device 131 are matched according to whether the battery inlet water temperature falls within the third predetermined range. For example, the third predetermined range is 20 ± 1 ℃, and whether the temperature of the battery inlet water is 20 ± 1 ℃ matches the opening degree of the second expansion valve 142 and the power of the condensing device 131.

Alternatively, the power of the evaporation device 121 is matched according to whether or not the indoor (in-vehicle) temperature falls within the fourth predetermined range. For example, the fourth predetermined range is [22, 26) ° c, and whether the indoor (in-vehicle) temperature is [22, 26) ° c matches the power of the evaporation device 121.

If the indoor (in-vehicle) temperature is [22, 26 ]) and the battery inlet water temperature is 20 ± 1 ℃, the condenser 131 and the compressor 132 are kept operating at constant power. And then the self-checking step is circulated.

If the indoor (in-vehicle) temperature is not [22, 26 ] DEG C and the inlet water temperature of the battery pack is 20 +/-1 ℃, the condensing unit 131 and the compressor 132 are kept to work at constant power; matching the opening degree of the first expansion valve 141 according to the indoor (in-vehicle) temperature to adjust the temperature of the second medium entering the evaporation device 121; the evaporation device 121 controls power according to the indoor (in-vehicle) temperature, and particularly, the evaporation device 121 controls the air volume according to the indoor (in-vehicle) temperature. And then the self-checking step is circulated.

If the indoor (in-vehicle) temperature does not belong to [22, 26 ] DEG C and the battery inlet water temperature does not belong to 20 +/-1 ℃, the condensing unit 131 and the compressor 132 match the refrigeration power according to the battery inlet water temperature; matching the opening degree of the first expansion valve 141 according to the indoor (in-vehicle) temperature to adjust the temperature of the second medium entering the evaporation device 121; the opening degree of the second expansion valve 142 is matched according to the inlet water temperature of the battery pack so as to adjust the temperature of the second medium entering the heat exchange device 112; the evaporation device 121 controls power according to the indoor (in-vehicle) temperature, and particularly, the evaporation device 121 controls the air volume according to the indoor (in-vehicle) temperature. And then the self-checking step is circulated.

If the indoor (in-vehicle) temperature is [22, 26 ] DEG C and the battery inlet water temperature is not 20 +/-1 ℃, the condensing device 131 and the compressor 132 match the refrigeration power according to the battery inlet water temperature; the opening degree of the second expansion valve 142 is matched according to the inlet water temperature of the battery pack so as to adjust the temperature of the second medium entering the heat exchange device 112; the evaporation device 121 controls power according to the indoor (in-vehicle) temperature, and particularly, the evaporation device 121 controls the air volume according to the indoor (in-vehicle) temperature.

Thus, based on the control method, the battery pack can be cooled in an outdoor environment with an appropriate temperature, and the condensing device, the first expansion valve, the second expansion valve and the evaporating device can be further adjusted according to the indoor temperature and the temperature of the first medium, so that the degree of automation is high.

As shown in fig. 7, when the outdoor (outside) temperature is [19, 35) ° c and there is no cooling demand from the battery pack 111, it is determined whether other devices are in an operating state such as on or off.

When the outdoor (exterior) temperature is [19, 35) ° c, the outdoor temperature sensor feeds back a signal to the controller, and the battery pack 111 has no refrigeration demand.

The controller detects: i) whether the compressor 132 and the condensing unit 131 are turned on; ii) whether the first expansion valve 141 is open, and whether the second expansion valve 142 is closed; iii) whether the second heating device 122 is off; iiii) whether the first heating means 113 is switched off.

When any one of the conditions of the compressor 132 and the condensing device 131 being closed, the first expansion valve 141 being closed, the second expansion valve 142 being open, the second heating device 122 being open, and the first heating device 113 being open occurs, a fault information alarm is made to further perform maintenance, and the process is circulated to the self-inspection step.

When the compressor 132 and the condenser 131 are both opened, the first expansion valve 141 is opened, the second expansion valve 142 is closed, the second heating device 122 is closed, and the first heating device 113 is closed, the indoor (in-vehicle) temperature is detected.

The indoor temperature sensor may feed back a signal to the controller.

The operating state of each device is judged according to the indoor (in-vehicle) temperature.

Alternatively, the opening degree of the first expansion valve 141, the power of the condensing device 131 and the evaporating device 121 are matched according to whether the indoor (in-vehicle) temperature belongs to the fourth predetermined range. For example, the fourth predetermined range is [22, 26) ° c, and whether the indoor (in-vehicle) temperature falls within [22, 26) ° c, matches the opening degree of the first expansion valve 141, the power of the condensing device 131, and the evaporating device 121.

When the indoor (in-vehicle) temperature is 22, 26 deg.c, the condenser 131 and the compressor 132 are operated with constant power. And then the self-checking step is circulated.

When the indoor (in-vehicle) temperature does not fall within [22, 26) ° c, the condensing device 131 and the compressor 132 match the cooling power according to the indoor (in-vehicle) temperature; matching the opening degree of the first expansion valve 141 according to the indoor (in-vehicle) temperature to adjust the temperature of the second medium entering the evaporation device 121; the evaporation device 121 controls power according to the indoor (in-vehicle) temperature, and particularly, the evaporation device 121 controls the air volume according to the indoor (in-vehicle) temperature. And then the self-checking step is circulated.

Therefore, the control method is suitable for outdoor environment with proper temperature, and can further adjust the condensing device, the first expansion valve and the evaporating device according to the indoor temperature, thereby having high automation degree.

As shown in fig. 8, when the outdoor (outside) temperature is greater than 35 ℃, and the battery pack 111 sends a cooling signal request to the controller, it is determined whether other devices are in an operating state such as on or off.

The controller detects: i) whether the compressor 132 and the condensing unit 131 are turned on; ii) whether both the first expansion valve 141 and the second expansion valve 142 are open; iii) whether the second heating device 122 is off; iiii) whether the first heating means 113 is switched off.

When any one of the conditions that the compressor 132 and the condensing device 131 are both closed, the first expansion valve 141 and the second expansion valve 142 are both closed, the second heating device 122 is opened, and the first heating device 113 is opened occurs, a fault information alarm is performed to further perform maintenance, and the process is circulated to the self-inspection step.

If the compressor 132 and the condensing device 131 are both opened, the first expansion valve 141 and the second expansion valve 142 are both opened, the second heating device 122 is closed, and the first heating device 113 is closed, the indoor (in-vehicle) temperature and the battery pack inlet water temperature are detected.

The indoor temperature sensor may feed back a signal to the controller. Meanwhile, the first medium temperature sensor may feed back a signal to the controller.

And judging the working state of each device according to the indoor (in-vehicle) temperature and the water inlet temperature of the battery pack.

Alternatively, the opening degree of the second expansion valve 142 and the power of the condensing device 131 are matched according to whether the battery inlet water temperature falls within the third predetermined range. For example, the third predetermined range is 20 ± 1 ℃, and whether the temperature of the battery inlet water is 20 ± 1 ℃ matches the opening degree of the second expansion valve 142 and the power of the condensing device 131.

Alternatively, the power of the evaporation device 121 is matched according to whether or not the indoor (in-vehicle) temperature falls within the fourth predetermined range. For example, the fourth predetermined range is 26 ± 1 ℃, and whether the indoor (in-vehicle) temperature is within 26 ± 1 ℃ matches the power of the evaporation device 121.

If the indoor (in-vehicle) temperature is 26 + -1 deg.C and the battery inlet water temperature is 20 + -1 deg.C, the condensing unit 131 and the compressor 132 are kept working at constant power. And then the self-checking step is circulated.

If the indoor (in-vehicle) temperature is not 26 +/-1 ℃ and the inlet water temperature of the battery pack is 20 +/-1 ℃, the condensing device 131 and the compressor 132 are kept to work at constant power; matching the opening degree of the first expansion valve 141 according to the indoor (in-vehicle) temperature to adjust the temperature of the second medium entering the evaporation device 121; the evaporation device 121 controls power according to the indoor (in-vehicle) temperature, and particularly, the evaporation device 121 controls the air volume according to the indoor (in-vehicle) temperature. And then the self-checking step is circulated.

If the indoor (in-vehicle) temperature does not belong to 26 +/-1 ℃ and the battery pack inlet water temperature does not belong to 20 +/-1 ℃, the condensing device 131 and the compressor 132 are matched with the refrigerating power according to the battery pack inlet water temperature; matching the opening degree of the first expansion valve 141 according to the indoor (in-vehicle) temperature to adjust the temperature of the second medium entering the evaporation device 121; the opening degree of the second expansion valve 142 is matched according to the inlet water temperature of the temperature battery pack so as to adjust the temperature of the second medium entering the heat exchange device 112; the evaporation device 121 controls power according to the indoor (in-vehicle) temperature, and particularly, the evaporation device 121 controls the air volume according to the indoor (in-vehicle) temperature. And then the self-checking step is circulated.

If the indoor (in-vehicle) temperature is 26 +/-1 ℃ and the inlet water temperature of the battery pack is not 20 +/-1 ℃, the condensing device 131 and the compressor 132 are matched with the refrigerating power according to the inlet water temperature of the battery pack; the opening degree of the second expansion valve 142 is matched according to the inlet water temperature of the battery pack so as to adjust the temperature of the second medium entering the heat exchange device 112; the evaporation device 121 controls power according to the indoor (in-vehicle) temperature, and particularly, the evaporation device 121 controls the air volume according to the indoor (in-vehicle) temperature.

Therefore, based on the control method, the battery pack can be cooled in a high-temperature outdoor environment, the condensing device, the first expansion valve, the second expansion valve and the evaporating device can be further adjusted according to the indoor temperature and the temperature of the first medium, and the automation degree is high.

The control method is used for a heat management system, the heat management system comprises a battery pack, a cooling system and a heating system, the heating system comprises a first heating device, the cooling system comprises a condensing device, a compressor, a first cooling branch and a second cooling branch, the first cooling branch comprises an evaporating device and a first expansion valve, the second cooling branch comprises a heat exchange device and a second expansion valve, the evaporating device is communicated with the condensing device in the opening state of the first expansion valve, the heat exchange device is communicated with the condensing device in the opening state of the second expansion valve, the first heating device is connected with the heat exchange device in parallel, and the first heating device and the heat exchange device are communicated with a pipeline of the battery pack through a third valve. Like this, carry out integrated control to the temperature of group battery 111 and the temperature of air, can in time can heat or refrigerate the group battery respectively according to the actual conditions of group battery, also can refrigerate the air according to actual environment, avoided the waste of the energy, the response is timely, has avoided the high or low excessively of temperature of group battery, has improved the security.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "part," "member," and the like, when used herein, can refer to either a single part or a combination of parts. Terms such as "mounted," "disposed," and the like, as used herein, may refer to one component as being directly attached to another component or one component as being attached to another component through intervening components. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.

The present invention has been described in terms of the above embodiments, but it should be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.