CN215496847U - Thermal management system and electric automobile - Google Patents
Thermal management system and electric automobile Download PDFInfo
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- CN215496847U CN215496847U CN202121265655.3U CN202121265655U CN215496847U CN 215496847 U CN215496847 U CN 215496847U CN 202121265655 U CN202121265655 U CN 202121265655U CN 215496847 U CN215496847 U CN 215496847U
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- 238000001816 cooling Methods 0.000 claims abstract description 137
- 238000010438 heat treatment Methods 0.000 claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 100
- 239000007788 liquid Substances 0.000 claims description 50
- 238000010586 diagram Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model provides a thermal management system and an electric automobile, wherein the thermal management system comprises: the device comprises a motor, a power battery, a motor cooling device, a battery heating device and a battery cooling device; the motor cooling device is connected with the motor; the battery heating device is respectively connected with the power battery and the motor; the battery cooling device is connected with the power battery; wherein the motor cooling device is used for cooling the motor; the battery heating device is used for heating the power battery; the battery cooling device is used for cooling the power battery. The cooling of the motor and the power battery can be realized, the heating of the power battery can also be realized, and the structure is simple, reliable and effective.
Description
Technical Field
The utility model relates to the technical field of vehicle thermal management, in particular to a thermal management system and an electric automobile.
Background
The two-drive type hub-driven electric automobile has obvious structural advantages, can be directly driven by a driving motor, does not need to pass through a speed reduction structure, saves traditional parts such as a transmission shaft, improves the efficiency of a transmission system, and is an ideal driving mode of the electric automobile. And because the structure and the control system of the two-drive type hub electric automobile are simple, the production cost is low, the servicing quality is low, and because the two-drive type hub electric automobile has two less hub motors than the four-drive type hub electric automobile, under the same driving working condition, the power loss is low, the motor system efficiency is high, and the driving range can be obviously improved.
However, because the capacity of the power battery pack of the electric vehicle is limited, a thermal management system needs to be provided under the condition that the energy source of the whole vehicle is fixed.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a thermal management system and an electric automobile, and aims to solve the problem that in the prior art, a wheel hub motor electric automobile cannot achieve reasonable thermal cycle.
In order to solve the above technical problem, an embodiment of the present invention provides the following technical solutions:
an embodiment of the present invention provides a thermal management system, including:
the device comprises a motor, a power battery, a motor cooling device, a battery heating device and a battery cooling device;
the motor cooling device is connected with the motor; the battery heating device is respectively connected with the power battery and the motor; the battery cooling device is connected with the power battery;
wherein the motor cooling device is used for cooling the motor;
the battery heating device is used for heating the power battery;
the battery cooling device is used for cooling the power battery.
Optionally, the motor cooling device comprises: a radiator, a first water pump and a cooling fan;
the radiator is respectively connected with the motor and the first water pump, and is used for receiving a first temperature signal sent by the motor and sending a first control signal to the first water pump; the cooling fan is connected with the motor and used for receiving a second temperature signal sent by the motor; the first temperature signal is used for indicating that the temperature of the motor is higher than a first preset temperature; the first control signal is used for controlling the first water pump to carry out liquid cooling on the motor; the second temperature signal is used for indicating that the temperature of the motor is higher than a second preset temperature and triggering the cooling fan to start;
wherein the second preset temperature is greater than the first preset temperature.
Optionally, the battery heating apparatus comprises: the heat exchanger and the second water pump;
the motor is connected with the power battery sequentially through the heat exchanger and the second water pump;
the heat exchanger is used for receiving a third temperature signal sent by the power battery and sending a second control signal to the second water pump; the third temperature signal is used for indicating that the temperature of the power battery is lower than a third preset temperature, and triggering the running heat of the motor to heat the liquid in the second water pump; the second control signal is used for controlling the second water pump to heat the liquid of the power battery.
Optionally, the battery cooling device comprises: the second water pump, the heat exchanger, the condenser and the cooling fan;
the heat exchanger is connected with the condenser and is also connected with the power battery through the second water pump; the heat exchanger is used for receiving a fourth temperature signal sent by the power battery, sending a third control signal to the condenser and sending a fourth control signal to the second water pump; the cooling fan is connected with the power battery and used for receiving a fifth temperature signal sent by the power battery; the fourth temperature signal is used for indicating that the temperature of the power battery is higher than a fourth preset temperature; the third control signal is used for instructing the condenser to pass through the heat exchanger to cool the liquid in the second water pump; the fourth control signal is used for controlling the second water pump to carry out liquid cooling on the power battery; the fifth temperature signal is used for indicating that the temperature of the power battery is higher than a fifth preset temperature and triggering the cooling fan to start;
wherein the fifth preset temperature is greater than the fourth preset temperature.
Optionally, the heat exchanger is a plate heat exchanger.
Optionally, the battery cooling apparatus further includes: a compressor and an expansion valve;
the heat exchanger is connected with the condenser through the compressor;
the condenser is connected with the heat exchanger through the expansion valve.
Alternatively,
the radiator is also used for receiving a sixth temperature signal sent by the motor and sending a fifth control signal to the first water pump; the cooling fan is also used for receiving a seventh temperature signal sent by the motor; the sixth temperature signal is used for indicating that the temperature of the motor is less than a sixth preset temperature; the fifth control signal is used for controlling the first water pump to stop carrying out liquid cooling on the motor; the seventh temperature signal is used for indicating that the temperature of the motor is lower than a seventh preset temperature and triggering the cooling fan to be turned off;
wherein the seventh preset temperature is greater than the sixth preset temperature.
Optionally, the heat exchanger is further configured to receive an eighth temperature signal sent by the power battery, and send a sixth control signal to the second water pump; the eighth temperature signal is used for indicating that the temperature of the power battery is higher than an eighth preset temperature; and the sixth control signal is used for controlling the second water pump to stop heating the liquid of the power battery.
Optionally, the heat exchanger is further configured to receive a ninth temperature signal sent by the power battery, send a seventh control signal to the condenser, and send an eighth control signal to the second water pump; the cooling fan is also used for receiving a tenth temperature signal sent by the power battery; the ninth temperature signal is used for indicating that the temperature of the power battery is lower than a ninth preset temperature; the seventh control signal is used for controlling the condenser to stop passing through the heat exchanger, and cooling the liquid in the second water pump; the eighth control signal is used for controlling the second water pump to stop carrying out liquid cooling on the power battery; the tenth temperature signal is used for indicating that the temperature of the power battery is lower than a tenth preset temperature and triggering the cooling fan to be turned off;
wherein the tenth preset temperature is greater than the ninth preset temperature.
An embodiment of the present invention further provides an electric vehicle, including the thermal management system as described in any one of the above.
The utility model has the beneficial effects that:
the scheme of the utility model provides a heat management system which comprises a motor, a power battery, a motor cooling device for cooling the motor, a battery heating device for heating the power battery and a battery cooling device for cooling the power battery, can realize cooling of the motor and the power battery and heating of the power battery, and has a simple structure, reliability and effectiveness.
Drawings
FIG. 1 is a schematic structural diagram of a thermal management system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a cooling apparatus for an electric motor according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a battery heating apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a battery cooling device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model provides a thermal management system and an electric automobile, aiming at the problem that in the prior art, a wheel hub motor electric automobile cannot realize reasonable thermal cycle.
As shown in fig. 1 to 4, an embodiment of the present invention provides a thermal management system, including:
the device comprises a motor, a power battery, a motor cooling device, a battery heating device and a battery cooling device;
the motor cooling device is connected with the motor; the battery heating device is respectively connected with the power battery and the motor; the battery cooling device is connected with the power battery;
wherein the motor cooling device is used for cooling the motor;
the battery heating device is used for heating the power battery;
the battery cooling device is used for cooling the power battery.
It should be noted that, the electric core of the electric vehicle battery has a temperature range that is most suitable for the working environment, and outside the most suitable working range, the performance of the power battery may be greatly compromised, so that the power battery needs to be heated when in a low-temperature environment, cooled when in a high-temperature environment, and cooled when the motor is in a high-temperature environment.
The heat management system comprises the motor, the power battery, a motor cooling device for cooling the motor, a battery heating device for heating the power battery and a battery cooling device for cooling the power battery, can cool the motor and the power battery, can heat the power battery, and is simple in structure, reliable and effective.
Optionally, the motor cooling device comprises: a radiator, a first water pump and a cooling fan;
the radiator is respectively connected with the motor and the first water pump, and is used for receiving a first temperature signal sent by the motor and sending a first control signal to the first water pump; the cooling fan is connected with the motor and used for receiving a second temperature signal sent by the motor; the first temperature signal is used for indicating that the temperature of the motor is higher than a first preset temperature; the first control signal is used for controlling the first water pump to carry out liquid cooling on the motor; the second temperature signal is used for indicating that the temperature of the motor is higher than a second preset temperature and triggering the cooling fan to start;
wherein the second preset temperature is greater than the first preset temperature.
In the embodiment of the present invention, please refer to fig. 2, taking an example that the thermal management system is applied to a two-drive hub motor electric vehicle, the motors are divided into a left motor and a right motor, and the left motor and the right motor are respectively connected with a motor controller. The motor cooling device is used for cooling the motor through the radiator, the cooling fan and the first water pump, when the motor controller monitors that the temperatures of the motor and the motor controller are higher than a first preset temperature T1, a first temperature signal is sent to the radiator, the radiator sends a first control signal to the first water pump according to the first temperature signal to control the first water pump to be started, and the first water pump pumps liquid into the motor and the motor controller to cool the motor. It should be noted that the rotation speed of the first water pump can be adjusted according to the current temperature of the motor and the motor controller. When the motor controller monitors that the temperatures of the motor and the motor controller are higher than a second preset temperature T2, a second temperature signal is sent to the cooling fan, and the cooling fan is started to perform air cooling on the motor and the motor controller according to the second temperature signal. Meanwhile, the first water pump does not stop liquid cooling of the motor and the motor controller, that is, when the temperature of the motor and the motor controller is higher than a first preset temperature T1, the motor and the motor controller are only subjected to liquid cooling through the first water pump, and when the temperature of the motor and the motor controller is higher than a second preset temperature T2, the motor and the motor controller are both subjected to liquid cooling through the first water pump and are also subjected to air cooling through the cooling fan.
Optionally, the battery heating apparatus comprises: the heat exchanger and the second water pump;
the motor is connected with the power battery sequentially through the heat exchanger and the second water pump;
the heat exchanger is used for receiving a third temperature signal sent by the power battery and sending a second control signal to the second water pump; the third temperature signal is used for indicating that the temperature of the power battery is lower than a third preset temperature, and triggering the running heat of the motor to heat the liquid in the second water pump; the second control signal is used for controlling the second water pump to heat the liquid of the power battery.
In the embodiment of the utility model, the power battery can be heated by utilizing the heat generated when the motor runs through the battery heating device, so that the power consumption of the power battery in a low-temperature environment is reduced, and the driving range is increased. Referring to fig. 3, the battery heating device is implemented by the heat exchanger and the second water pump for the power battery, when the temperature of the power battery is lower than a third preset temperature T3, the power battery sends a third temperature signal to the heat exchanger, the heat exchanger heats the liquid in the second water pump by using the heat generated by the operation of the motor according to the third temperature signal, and sends a second control signal to the second water pump to control the second water pump to pump the heated liquid into the power battery, so as to heat the liquid in the power battery.
Optionally, the battery cooling device comprises: the second water pump, the heat exchanger, the condenser and the cooling fan;
the heat exchanger is connected with the condenser and is also connected with the power battery through the second water pump; the heat exchanger is used for receiving a fourth temperature signal sent by the power battery, sending a third control signal to the condenser and sending a fourth control signal to the second water pump; the cooling fan is connected with the power battery and used for receiving a fifth temperature signal sent by the power battery; the fourth temperature signal is used for indicating that the temperature of the power battery is higher than a fourth preset temperature; the third control signal is used for instructing the condenser to pass through the heat exchanger to cool the liquid in the second water pump; the fourth control signal is used for controlling the second water pump to carry out liquid cooling on the power battery; the fifth temperature signal is used for indicating that the temperature of the power battery is higher than a fifth preset temperature and triggering the cooling fan to start;
wherein the fifth preset temperature is greater than the fourth preset temperature.
In the embodiment of the present invention, referring to fig. 4, the heating of the power battery by the battery cooling device is implemented by the second water pump, the heat exchanger, the condenser and the cooling fan, when the temperature of the power battery is higher than a fourth preset temperature T4, the heat exchanger sends a fourth temperature signal to the heat exchanger, the heat exchanger sends a third control signal to the condenser according to the fourth temperature signal, the heat exchanger controls the condenser to cool the liquid in the second water pump, and sends a fourth control signal to the second water pump, and the second water pump pumps the liquid in the second water pump into the power battery according to the fourth control signal to cool the liquid in the power battery. And when the temperature of the power battery is higher than a fifth preset temperature T5, sending a fifth temperature signal to the cooling fan, and according to the fifth temperature signal, starting the cooling fan to perform air cooling on the power battery. Meanwhile, the second water pump does not stop liquid cooling of the power battery, that is, when the temperature of the power battery is higher than the fourth preset temperature T4, the power battery is only subjected to liquid cooling through the second water pump, and when the temperature of the power battery is higher than the fifth preset temperature T5, the power battery is subjected to liquid cooling through the second water pump and is also subjected to air cooling through the cooling fan.
Optionally, the heat exchanger is a plate heat exchanger.
In the embodiment of the utility model, the heat exchanger in the battery heating device and the heat exchanger in the battery cooling device are both plate type heat exchangers, so that the battery cooling device has better heat exchange effect and is flexible to assemble.
Optionally, the battery cooling apparatus further includes: a compressor and an expansion valve;
the heat exchanger is connected with the condenser through the compressor;
the condenser is connected with the heat exchanger through the expansion valve.
In an embodiment of the present invention, with continuing to refer to fig. 4, the battery cooling device further includes a compressor and an expansion valve, when the temperature of the power battery is higher than a fourth preset temperature T4, the heat exchanger controls the compressor to compress the refrigerant in the condenser, and then the refrigerant is expanded by the expansion valve and introduced into the heat exchanger, and the liquid in the second water pump is cooled by the heat exchanger, so that the liquid in the second water pump can be rapidly cooled.
Optionally, the radiator is further configured to receive a sixth temperature signal sent by the motor, and send a fifth control signal to the first water pump; the cooling fan is also used for receiving a seventh temperature signal sent by the motor; the sixth temperature signal is used for indicating that the temperature of the motor is less than a sixth preset temperature; the fifth control signal is used for controlling the first water pump to stop carrying out liquid cooling on the motor; the seventh temperature signal is used for indicating that the temperature of the motor is lower than a seventh preset temperature and triggering the cooling fan to be turned off;
wherein the seventh preset temperature is greater than the sixth preset temperature.
In the embodiment of the utility model, when the motor controller monitors that the temperatures of the motor and the motor controller are lower than a sixth preset temperature T6, a sixth temperature signal is sent to the radiator, and the radiator sends a fifth control signal to the first water pump according to the sixth temperature signal to control the first water pump to stop liquid cooling of the motor. When the motor controller monitors that the temperatures of the motor and the motor controller are lower than a seventh preset temperature T7, a seventh temperature signal is sent to the cooling fan, the cooling fan stops air cooling of the motor and the motor controller according to the seventh temperature signal, meanwhile, the first water pump does not stop liquid cooling of the motor and the motor controller, namely, when the temperatures of the motor and the motor controller are lower than the seventh preset temperature T7, the motor and the motor controller are cooled through air cooling by the cooling fan, the motor and the motor controller are cooled through liquid by the first water pump, and when the temperatures of the motor and the motor controller are lower than a sixth preset temperature T6, the motor and the motor controller are cooled through liquid of the first water pump.
Optionally, the heat exchanger is further configured to receive an eighth temperature signal sent by the power battery, and send a sixth control signal to the second water pump; the eighth temperature signal is used for indicating that the temperature of the power battery is higher than an eighth preset temperature; and the sixth control signal is used for controlling the second water pump to stop heating the liquid of the power battery.
In the embodiment of the utility model, when the temperature of the power battery is higher than the eighth preset temperature T8, an eighth temperature signal is sent to the heat exchanger, the heat exchanger stops heating the liquid in the second water pump by using the operation heat of the motor according to the eighth temperature signal, and a sixth control signal is sent to the second water pump to control the second water pump to stop heating the liquid in the power battery.
Optionally, the heat exchanger is further configured to receive a ninth temperature signal sent by the power battery, send a seventh control signal to the condenser, and send an eighth control signal to the second water pump; the cooling fan is also used for receiving a tenth temperature signal sent by the power battery; the ninth temperature signal is used for indicating that the temperature of the power battery is lower than a ninth preset temperature; the seventh control signal is used for controlling the condenser to stop passing through the heat exchanger, and cooling the liquid in the second water pump; the eighth control signal is used for controlling the second water pump to stop carrying out liquid cooling on the power battery; the tenth temperature signal is used for indicating that the temperature of the power battery is lower than a tenth preset temperature and triggering the cooling fan to be turned off;
wherein the tenth preset temperature is greater than the ninth preset temperature.
In the embodiment of the utility model, when the temperature of the power battery is lower than a ninth preset temperature T9, a ninth temperature signal is sent to the heat exchanger, the heat exchanger sends a seventh control signal to the condenser according to the ninth temperature signal, the condenser is controlled to stop cooling the liquid in the second water pump through the heat exchanger, and an eighth control signal is sent to the second water pump, and the power battery is controlled to stop cooling the liquid by the second water pump. And when the temperature of the power battery is lower than a tenth preset temperature T10, sending a tenth temperature signal to the second water pump, and stopping the air cooling of the power battery by the second water pump according to the tenth temperature signal.
It should be noted that, referring to fig. 1, to reduce the volume of the thermal management system, the cooling fan in the motor cooling device is multiplexed with the cooling fan in the battery temperature device, the second water pump in the battery heating device is multiplexed with the second water pump in the battery cooling device, the heat exchanger in the battery heating device is multiplexed with the heat exchanger in the battery cooling device, and a first three-way valve, a second three-way valve and a tee joint are arranged in the thermal management system, wherein the first three-way valve is connected with the left motor, the right motor, the radiator and the second three-way valve, and the second three-way valve is connected with the first three-way valve, the heat exchanger and the tee joint respectively.
An embodiment of the present invention further provides an electric vehicle, including the thermal management system as described in any one of the above.
It should be noted that, the electric vehicle provided in the embodiment of the present invention includes the thermal management system as described in any one of the above embodiments, and all embodiments of the thermal management system are applicable to the electric vehicle, and can achieve the same or similar technical effects.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model as defined in the following claims.
Claims (10)
1. A thermal management system, comprising:
the device comprises a motor, a power battery, a motor cooling device, a battery heating device and a battery cooling device;
the motor cooling device is connected with the motor; the battery heating device is respectively connected with the power battery and the motor; the battery cooling device is connected with the power battery;
wherein the motor cooling device is used for cooling the motor;
the battery heating device is used for heating the power battery;
the battery cooling device is used for cooling the power battery.
2. The thermal management system of claim 1, wherein the electric machine cooling device comprises: a radiator, a first water pump and a cooling fan;
the radiator is respectively connected with the motor and the first water pump, and is used for receiving a first temperature signal sent by the motor and sending a first control signal to the first water pump; the cooling fan is connected with the motor and used for receiving a second temperature signal sent by the motor; the first temperature signal is used for indicating that the temperature of the motor is higher than a first preset temperature; the first control signal is used for controlling the first water pump to carry out liquid cooling on the motor; the second temperature signal is used for indicating that the temperature of the motor is higher than a second preset temperature and triggering the cooling fan to start;
wherein the second preset temperature is greater than the first preset temperature.
3. The thermal management system of claim 1, wherein the battery heating device comprises: the heat exchanger and the second water pump;
the motor is connected with the power battery sequentially through the heat exchanger and the second water pump;
the heat exchanger is used for receiving a third temperature signal sent by the power battery and sending a second control signal to the second water pump; the third temperature signal is used for indicating that the temperature of the power battery is lower than a third preset temperature, and triggering the running heat of the motor to heat the liquid in the second water pump; the second control signal is used for controlling the second water pump to heat the liquid of the power battery.
4. The thermal management system of claim 1, wherein the battery cooling device comprises: the second water pump, the heat exchanger, the condenser and the cooling fan;
the heat exchanger is connected with the condenser and is also connected with the power battery through the second water pump; the heat exchanger is used for receiving a fourth temperature signal sent by the power battery, sending a third control signal to the condenser and sending a fourth control signal to the second water pump; the cooling fan is connected with the power battery and used for receiving a fifth temperature signal sent by the power battery; the fourth temperature signal is used for indicating that the temperature of the power battery is higher than a fourth preset temperature; the third control signal is used for instructing the condenser to pass through the heat exchanger to cool the liquid in the second water pump; the fourth control signal is used for controlling the second water pump to carry out liquid cooling on the power battery; the fifth temperature signal is used for indicating that the temperature of the power battery is higher than a fifth preset temperature and triggering the cooling fan to start;
wherein the fifth preset temperature is greater than the fourth preset temperature.
5. The thermal management system of claim 3 or 4, wherein the heat exchanger is a plate heat exchanger.
6. The thermal management system of claim 4, wherein the battery cooling device further comprises: a compressor and an expansion valve;
the heat exchanger is connected with the condenser through the compressor;
the condenser is connected with the heat exchanger through the expansion valve.
7. The thermal management system of claim 2, wherein the heat sink is further configured to receive a sixth temperature signal sent by the motor and send a fifth control signal to the first water pump; the cooling fan is also used for receiving a seventh temperature signal sent by the motor; the sixth temperature signal is used for indicating that the temperature of the motor is less than a sixth preset temperature; the fifth control signal is used for controlling the first water pump to stop carrying out liquid cooling on the motor; the seventh temperature signal is used for indicating that the temperature of the motor is lower than a seventh preset temperature and triggering the cooling fan to be turned off;
wherein the seventh preset temperature is greater than the sixth preset temperature.
8. The thermal management system of claim 3, wherein the heat exchanger is further configured to receive an eighth temperature signal sent by the power battery and send a sixth control signal to the second water pump; the eighth temperature signal is used for indicating that the temperature of the power battery is higher than an eighth preset temperature; and the sixth control signal is used for controlling the second water pump to stop heating the liquid of the power battery.
9. The thermal management system of claim 4, wherein the heat exchanger is further configured to receive a ninth temperature signal sent by the power battery, send a seventh control signal to the condenser, and send an eighth control signal to the second water pump; the cooling fan is also used for receiving a tenth temperature signal sent by the power battery; the ninth temperature signal is used for indicating that the temperature of the power battery is lower than a ninth preset temperature; the seventh control signal is used for controlling the condenser to stop passing through the heat exchanger, and cooling the liquid in the second water pump; the eighth control signal is used for controlling the second water pump to stop carrying out liquid cooling on the power battery; the tenth temperature signal is used for indicating that the temperature of the power battery is lower than a tenth preset temperature and triggering the cooling fan to be turned off;
wherein the tenth preset temperature is greater than the ninth preset temperature.
10. An electric vehicle comprising a thermal management system according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202121265655.3U CN215496847U (en) | 2021-06-07 | 2021-06-07 | Thermal management system and electric automobile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121265655.3U CN215496847U (en) | 2021-06-07 | 2021-06-07 | Thermal management system and electric automobile |
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| CN215496847U true CN215496847U (en) | 2022-01-11 |
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| CN202121265655.3U Active CN215496847U (en) | 2021-06-07 | 2021-06-07 | Thermal management system and electric automobile |
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