Battery thermal management system for vehicle and vehicle

Abstract

The invention discloses a battery heat management system for a vehicle and the vehicle, and relates to the technical field of vehicles, the vehicle comprises a power battery and a fuel cell, and the battery heat management system comprises a power battery heat exchange flow path, a fuel cell heat exchange flow path and a battery heat exchange flow path, the fuel cell heat exchange flow path is used for communicating with a fuel cell so as to exchange heat with the fuel cell, and a heat exchange medium in the power cell heat exchange flow path selectively exchanges heat with the air conditioner circulation flow path so as to adjust the temperature of the heat exchange medium in the power cell heat exchange flow path; and a heat exchange medium in the fuel cell heat exchange flow path selectively exchanges heat with the air conditioner circulation flow path so as to adjust the temperature of the heat exchange medium in the fuel cell heat exchange flow path. Therefore, the power battery and the fuel battery can be at the proper working temperature, the safety of the vehicle can be improved, the heat of the power battery and the fuel battery can also be used for other parts of the vehicle, the energy consumption of the vehicle can be reduced, and the utilization rate of the energy of the whole vehicle can also be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a battery thermal management system for a vehicle and a vehicle. Background Art

[0002] In the related art, a large amount of heat is generated by the battery of a vehicle during operation. Excessive heat will have an adverse effect on the battery, thereby affecting both the life and performance of the battery. When the battery temperature is too high, there is also a risk of battery overheating, which greatly reduces the safety of the vehicle. Moreover, the heat of the battery is not utilized, resulting in low overall vehicle energy utilization. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, an object of the present invention is to provide a battery thermal management system for a vehicle, which can keep the power battery and the fuel cell at an appropriate operating temperature, thereby improving the safety of the vehicle. The heat of the power battery and the fuel cell can also be used for other components of the vehicle, thereby reducing the energy consumption of the vehicle and improving the overall vehicle energy utilization.

[0004] The present invention further provides a vehicle having the above battery thermal management system.

[0005] According to an embodiment of the present invention, for a battery thermal management system of a vehicle, the vehicle includes a power battery and a fuel cell. The battery thermal management system includes: a power battery heat exchange flow path for communicating with the power battery to exchange heat with the power battery; a fuel cell heat exchange flow path for communicating with the fuel cell to exchange heat with the fuel cell; an air-conditioning circulation flow path, and the heat exchange medium in the power battery heat exchange flow path selectively exchanges heat with the air-conditioning circulation flow path to adjust the temperature of the heat exchange medium in the power battery heat exchange flow path, and the heat exchange medium in the fuel cell heat exchange flow path selectively exchanges heat with the air-conditioning circulation flow path to adjust the temperature of the heat exchange medium in the fuel cell heat exchange flow path.

[0006] According to an embodiment of the present invention, for a battery thermal management system of a vehicle, by using the power battery heat exchange flow path for communicating with the power battery to exchange heat with the power battery, the fuel cell heat exchange flow path for communicating with the fuel cell to exchange heat with the fuel cell, the heat exchange medium in the power battery heat exchange flow path selectively exchanges heat with the air-conditioning circulation flow path to adjust the temperature of the heat exchange medium in the power battery heat exchange flow path, and the heat exchange medium in the fuel cell heat exchange flow path selectively exchanges heat with the air-conditioning circulation flow path to adjust the temperature of the heat exchange medium in the fuel cell heat exchange flow path, it can keep the power battery and the fuel cell at an appropriate operating temperature, thereby improving the safety of the vehicle. The heat of the power battery and the fuel cell can also be used for other components of the vehicle, thereby reducing the energy consumption of the vehicle and improving the overall vehicle energy utilization.

[0007] In some embodiments of the present invention, the heat exchange flow path of the power battery includes: a first heat exchange flow path and a second heat exchange flow path. The first heat exchange flow path inlet of the first heat exchange flow path is selectively connected to the power battery, and the first heat exchange flow path outlet of the first heat exchange flow path is connected to the power battery;

[0008] The second heat exchange flow path inlet of the second heat exchange flow path is selectively connected to the power battery, and the second heat exchange flow path outlet of the second heat exchange flow path is connected to the power battery. The second heat exchange flow path is used for heat exchange with the air-conditioning circulation flow path.

[0009] In some embodiments of the present invention, the battery thermal management system further includes: a first three-way valve. The first three-way valve has a first valve port, a second valve port, and a third valve port. The first valve port is used for connecting to the power battery, the second valve port is connected to the first heat exchange flow path inlet, and the third valve port is connected to the second heat exchange flow path inlet; and / or

[0010] The air-conditioning circulation flow path has a cooler. The cooler and the second heat exchange flow path are assembled together, and the refrigerant medium in the cooler exchanges heat with the second heat exchange flow path.

[0011] In some embodiments of the present invention, the first heat exchange flow path has a first radiator and a first pump body connected in series. Along the flow direction of the heat exchange medium in the first heat exchange flow path, the first pump body is located on the downstream side of the first radiator.

[0012] In some embodiments of the present invention, the second heat exchange flow path outlet is connected to the first heat exchange flow path. Along the flow direction of the heat exchange medium in the first heat exchange flow path, the connection point between the second heat exchange flow path outlet and the first heat exchange flow path is located on the upstream side of the first pump body.

[0013] In some embodiments of the present invention, the fuel cell heat exchange flow path includes: a third heat exchange flow path and a fourth heat exchange flow path. The third heat exchange flow path inlet of the third heat exchange flow path is selectively connected to the fuel cell, and the third heat exchange flow path outlet of the third heat exchange flow path is connected to the fuel cell;

[0014] The fourth heat exchange flow path inlet of the fourth heat exchange flow path is selectively connected to the fuel cell, and the fourth heat exchange flow path outlet of the fourth heat exchange flow path is connected to the fuel cell. The fourth heat exchange flow path is used for heat exchange with the air-conditioning circulation flow path.

[0015] In some embodiments of the present invention, the battery thermal management system further includes: a second three-way valve. The second three-way valve has a fourth valve port, a fifth valve port, and a sixth valve port. The fourth valve port is used for connecting to the fuel cell, the fifth valve port is connected to the third heat exchange flow path inlet, and the sixth valve port is connected to the fourth heat exchange flow path inlet; and / or

[0016] The air-conditioning circulation flow path has a heat exchanger, and the heat exchanger is assembled in cooperation with the fourth heat exchange flow path, and the refrigerant medium in the heat exchanger exchanges heat with the fourth heat exchange flow path.

[0017] In some embodiments of the present invention, the third heat exchange flow path has a second radiator and a second pump body connected in series. Along the flow direction of the heat exchange medium in the third heat exchange flow path, the second pump body is located on the downstream side of the second radiator;

[0018] The outlet of the fourth heat exchange flow path is communicated with the third heat exchange flow path. Along the flow direction of the heat exchange medium in the third heat exchange flow path, the connection point between the outlet of the fourth heat exchange flow path and the third heat exchange flow path is located on the upstream side of the second pump body.

[0019] In some embodiments of the present invention, the battery thermal management system further includes: a first expansion water tank and a second expansion water tank. The power battery heat exchange flow path is communicated with the first expansion water tank, and the fuel cell heat exchange flow path is communicated with the second expansion water tank.

[0020] The vehicle according to the embodiment of the present invention includes the battery thermal management system for a vehicle in the above embodiment.

[0021] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0022] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0023] Figure 1 is a schematic structural diagram of the battery thermal management system according to the embodiment of the present invention.

[0024] Reference Numerals:

[0025] Battery thermal management system 100;

[0026] Power battery heat exchange flow path 10;

[0027] First heat exchange flow path 11; First heat exchange flow path inlet 111; First heat exchange flow path outlet 112; First radiator 113; First pump body 114;

[0028] Second heat exchange flow path 12; Second heat exchange flow path inlet 121; Second heat exchange flow path outlet 122;

[0029] Fuel cell heat exchange flow path 20;

[0030] Third heat exchange flow path 21; Third heat exchange flow path inlet 211; Third heat exchange flow path outlet 212; Second radiator 213; Second pump body 214;

[0031] Fourth heat exchange flow path 22; Fourth heat exchange flow path inlet 221; Fourth heat exchange flow path outlet 222;

[0032] Air conditioning circulation flow path 30; Cooler 31; Heat exchanger 32; Compressor 33; Condenser 34; Expansion valve 35;

[0033] First three-way valve 40; First valve port 41; Second valve port 42; Third valve port 43;

[0034] Second three-way valve 50; Fourth valve port 51; Fifth valve port 52; Sixth valve port 53;

[0035] First expansion water tank 60; Second expansion water tank 61; First fan 62; Second fan 63; Third fan 64;

[0036] Power battery 200;

[0037] Fuel cell 300. Detailed implementation manners

[0038] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0039] Refer to the following Figure 1 to describe a battery thermal management system 100 for a vehicle and a vehicle according to an embodiment of the present invention.

[0040] A battery thermal management system 100 for a vehicle according to an embodiment of the present invention, the vehicle includes a power battery 200 and a fuel cell 300, and the battery thermal management system 100 includes: a power battery heat exchange flow path 10 for communicating with the power battery 200 to exchange heat with the power battery 200; a fuel cell heat exchange flow path 20 for communicating with the fuel cell 300 to exchange heat with the fuel cell 300; an air conditioning circulation flow path 30, and the heat exchange medium in the power battery heat exchange flow path 10 selectively exchanges heat with the air conditioning circulation flow path 30 to adjust the temperature of the heat exchange medium in the power battery heat exchange flow path 10, and the heat exchange medium in the fuel cell heat exchange flow path 20 selectively exchanges heat with the air conditioning circulation flow path 30 to adjust the temperature of the heat exchange medium in the fuel cell heat exchange flow path 20.

[0041] Among them, a heat exchange medium flows in the power battery heat exchange flow path 10. The heat exchange medium can be water, ethylene glycol, etc. The power battery heat exchange flow path 10 is used to communicate with the power battery 200 for heat exchange with the power battery 200, thereby realizing the transfer and exchange of the heat of the power battery 200. When the temperature of the power battery 200 is too high, the heat exchange medium in the heat exchange flow path will absorb the excess heat and take it away. When the temperature of the power battery 200 is too low, the heat exchange medium can also transfer heat to the power battery 200 to keep the power battery 200 within an appropriate operating temperature range.

[0042] A heat exchange medium flows in the fuel cell heat exchange flow path 20. The heat exchange medium can be water, ethylene glycol, etc. The fuel cell heat exchange flow path 20 is used to communicate with the fuel cell 300 for heat exchange with the fuel cell 300, thereby realizing the transfer and exchange of the heat of the fuel cell 300. When the temperature of the fuel cell 300 is too high, the heat exchange medium in the heat exchange flow path will absorb the excess heat and take it away. When the temperature of the fuel cell 300 is too low, the heat exchange medium can also transfer heat to the fuel cell 300 to keep the fuel cell 300 within an appropriate operating temperature range.

[0043] A refrigerant medium flows in the air-conditioning circulation flow path 30. The heat exchange medium in the power battery heat exchange flow path 10 selectively exchanges heat with the air-conditioning circulation flow path 30 to adjust the temperature of the heat exchange medium in the power battery heat exchange flow path 10. Specifically, when the heat of the power battery 200 is too large and the heat exchange between the power battery heat exchange flow path 10 and the power battery 200 alone cannot meet the heat exchange requirements of the power battery 200, the heat exchange medium in the power battery heat exchange flow path 10 can be made to exchange heat with the air-conditioning circulation flow path 30 to adjust the temperature of the heat exchange medium in the power battery heat exchange flow path 10. The refrigerant medium in the air-conditioning circulation flow path 30 can absorb the heat of the heat exchange medium in the power battery heat exchange flow path 10 to cool the heat exchange medium in the power battery heat exchange flow path 10, so that the cooled heat exchange medium in the power battery heat exchange flow path 10 can further cool the power battery 200, and thus the power battery 200 can be kept at an appropriate operating temperature.

[0044] When the heat exchange cooperation between the power battery heat exchange flow path 10 and the power battery 200 can meet the heat exchange requirements of the power battery 200, there is no need for the heat exchange medium in the power battery heat exchange flow path 10 to exchange heat with the air-conditioning circulation flow path 30 to adjust the temperature of the heat exchange medium in the power battery heat exchange flow path 10.

[0045] The heat exchange medium in the fuel cell heat exchange flow path 20 selectively exchanges heat with the air-conditioning circulation flow path 30 to adjust the temperature of the heat exchange medium in the fuel cell heat exchange flow path 20. Specifically, when the heat of the fuel cell 300 is too large and the heat exchange between the fuel cell heat exchange flow path 20 and the fuel cell 300 alone cannot meet the heat exchange requirements of the fuel cell 300, the heat exchange medium in the fuel cell heat exchange flow path 20 can be made to exchange heat with the air-conditioning circulation flow path 30 to adjust the temperature of the heat exchange medium in the fuel cell heat exchange flow path 20, enabling the refrigerant medium in the air-conditioning circulation flow path 30 to absorb the heat of the heat exchange medium in the fuel cell heat exchange flow path 20, cooling the heat exchange medium in the fuel cell heat exchange flow path 20, so that the cooled heat exchange medium in the fuel cell heat exchange flow path 20 can further cool the fuel cell 300, and further enabling the fuel cell 300 to be maintained at an appropriate working temperature.

[0046] When the heat exchange cooperation between the fuel cell heat exchange flow path 20 and the fuel cell 300 can meet the heat exchange requirements of the fuel cell 300, there is no need for the heat exchange medium in the fuel cell heat exchange flow path 20 to selectively exchange heat with the air-conditioning circulation flow path 30 to adjust the temperature of the heat exchange medium in the fuel cell heat exchange flow path 20.

[0047] Moreover, the heat absorbed by the heat exchange medium in the air-conditioning circulation flow path 30 after exchanging heat with the heat exchange medium in the power battery heat exchange flow path 10 and the fuel cell heat exchange flow path 20 can also be used for other components of the vehicle (such as for heating the passenger compartment), realizing the recovery and utilization of the heat of the power battery 200 and the fuel cell 300. And the battery thermal management system 100 of the present application can dynamically adjust the working states of the air-conditioning circulation flow path 30, the power battery heat exchange flow path 10, and the fuel cell heat exchange flow path 20 according to the actual temperature requirements of the power battery 200 and the fuel cell 300, which can not only ensure that the power battery 200 and the fuel cell 300 work within the optimal temperature range, but also improve the energy efficiency, reliability, and flexibility of the entire battery thermal management system 100, thereby being able to reduce the energy consumption of the vehicle and also improve the utilization rate of the overall vehicle energy.

[0048] According to the battery thermal management system 100 for a vehicle according to an embodiment of the present invention, the power battery heat exchange flow path 10 is used to communicate with the power battery 200 to exchange heat with the power battery 200, the fuel cell heat exchange flow path 20 is used to communicate with the fuel cell 300 to exchange heat with the fuel cell 300, the heat exchange medium in the power battery heat exchange flow path 10 selectively exchanges heat with the air-conditioning circulation flow path 30 to adjust the temperature of the heat exchange medium in the power battery heat exchange flow path 10, and the heat exchange medium in the fuel cell heat exchange flow path 20 selectively exchanges heat with the air-conditioning circulation flow path 30 to adjust the temperature of the heat exchange medium in the fuel cell heat exchange flow path 20, which can make the power battery 200 and the fuel cell 300 be at appropriate working temperatures, thereby improving the safety of the vehicle. The heat of the power battery 200 and the fuel cell 300 can also be used for other components of the vehicle, thereby reducing the energy consumption of the vehicle and improving the utilization rate of the overall vehicle energy.

[0049] In some embodiments of the present invention, as Figure 1 shown, the power battery heat exchange flow path 10 may include: a first heat exchange flow path 11 and a second heat exchange flow path 12. The first heat exchange flow path inlet 111 of the first heat exchange flow path 11 selectively communicates with the power battery 200, and the first heat exchange flow path outlet 112 of the first heat exchange flow path 11 communicates with the power battery 200. The second heat exchange flow path inlet 121 of the second heat exchange flow path 12 selectively communicates with the power battery 200, and the second heat exchange flow path outlet 122 of the second heat exchange flow path 12 communicates with the power battery 200. The second heat exchange flow path 12 is used to exchange heat with the air-conditioning circulation flow path 30.

[0050] Wherein, the first heat exchange flow path inlet 111 and the power battery 200 can be connected through a valve (such as a solenoid valve, a three-way valve, etc.) so that the first heat exchange flow path inlet 111 of the first heat exchange flow path 11 selectively communicates with the power battery 200. Specifically, when the first heat exchange flow path inlet 111 of the first heat exchange flow path 11 communicates with the power battery 200 and the first heat exchange flow path outlet 112 of the first heat exchange flow path 11 communicates with the power battery 200, a complete heat exchange loop is formed in the first heat exchange flow path 11, and then the first heat exchange flow path 11 communicates with the power battery 200 to exchange heat with the power battery 200. By precisely controlling whether the first heat exchange flow path inlet 111 of the first heat exchange flow path 11 communicates with the power battery 200, precise management of the temperature of the power battery 200 can be achieved, which can ensure that the power battery 200 is at an appropriate working temperature, thereby improving the working performance and safety of the power battery 200.

[0051] A valve (such as a solenoid valve, a three-way valve, etc.) can be used to connect the inlet 121 of the second heat exchange flow path to the power battery 200, so that the inlet 121 of the second heat exchange flow path 12 can be selectively communicated with the power battery 200. Specifically, when the heat of the power battery 200 is too large and the heat exchange between the power battery 200 and the first heat exchange flow path 11 alone cannot meet the heat exchange requirements of the power battery 200, the inlet 121 of the second heat exchange flow path 12 can be communicated with the power battery 200. As a result, part of the heat exchange medium flowing through the power battery 200 flows into the second heat exchange flow path 12 from the inlet 121 of the second heat exchange flow path. When the outlet 122 of the second heat exchange flow path 12 is communicated with the power battery 200, a complete heat exchange loop is formed for the second heat exchange flow path 12. The second heat exchange flow path 12 is used to exchange heat with the air-conditioning circulation flow path 30, enabling the refrigerant medium in the air-conditioning circulation flow path 30 to absorb the heat of the heat exchange medium in the second heat exchange flow path 12. The cooled heat exchange medium in the second heat exchange flow path 12 flows through the power battery 200 again to further cool the power battery 200, ensuring that the operating temperature of the power battery 200 is appropriate.

[0052] With such an arrangement, the second heat exchange flow path 12 serves as an auxiliary heat exchange flow path for the power battery 200. It can be selectively connected or disconnected according to the actual heat condition of the power battery 200. This not only improves the heat dissipation efficiency of the power battery 200 but also makes full use of the air-conditioning system resources inside the vehicle. It can flexibly adjust the configuration of the heat exchange flow path according to the actual temperature requirements of the power battery 200, ensuring that the power battery 200 always operates within an appropriate temperature range, and thus enhancing the stability and safety of the battery thermal management system 100.

[0053] In some embodiments of the present invention, as Figure 1 shown, the battery thermal management system 100 may further include: a first three-way valve 40 having a first valve port 41, a second valve port 42, and a third valve port 43. The first valve port 41 is used to communicate with the power battery 200, the second valve port 42 is communicated with the inlet 111 of the first heat exchange flow path, and the third valve port 43 is communicated with the inlet 121 of the second heat exchange flow path; and / or

[0054] The air-conditioning circulation flow path 30 may have a cooler 31. The cooler 31 and the second heat exchange flow path 12 are assembled in cooperation, and the refrigerant medium in the cooler 31 exchanges heat with the second heat exchange flow path 12.

[0055] Among them, the first valve port 41 is used to communicate with the power battery 200, the second valve port 42 is communicated with the first heat exchange flow path inlet 111, and the third valve port 43 is communicated with the second heat exchange flow path inlet 121. By controlling the opening and closing of the first valve port 41, the second valve port 42, and the third valve port 43 of the first three-way valve 40, the power battery 200 can be selectively communicated with both the first heat exchange flow path inlet 111 and the second heat exchange flow path inlet 121, and the connection between the power battery 200 and the first heat exchange flow path 11 and the second heat exchange flow path 12 can be flexibly controlled according to the heat amount of the power battery 200. Thus, through the heat exchange cooperation between the first heat exchange flow path 11, the second heat exchange flow path 12 and the power battery 200, the precise control of the temperature of the power battery 200 can be realized, which can not only improve the efficiency of the battery thermal management system 100, but also enhance the adaptability and reliability of the battery thermal management system 100.

[0056] Alternatively, a refrigerant medium flows in the cooler 31, and the cooler 31 and the second heat exchange flow path 12 are assembled in cooperation so that the refrigerant medium in the cooler 31 exchanges heat with the second heat exchange flow path 12, enabling the refrigerant medium to absorb the heat of the heat exchange medium in the second heat exchange flow path 12. The cooled heat exchange medium in the second heat exchange flow path 12 flows through the power battery 200 again through the second heat exchange flow path 12, which can further cool the power battery 200 to ensure that the power battery 200 is at an appropriate working temperature, not only improving the thermal management efficiency of the power battery 200, but also helping to extend the service life and performance stability of the power battery 200.

[0057] Alternatively, the battery thermal management system 100 includes: a first three-way valve 40, the first three-way valve 40 has a first valve port 41, a second valve port 42, and a third valve port 43. The first valve port 41 is used to communicate with the power battery 200, the second valve port 42 is communicated with the first heat exchange flow path inlet 111, and the third valve port 43 is communicated with the second heat exchange flow path inlet 121. And the air-conditioning circulation flow path 30 can have a cooler 31, the cooler 31 and the second heat exchange flow path 12 are assembled in cooperation, and the refrigerant medium in the cooler 31 exchanges heat with the second heat exchange flow path 12. Not only can the precise control of the temperature of the power battery 200 be realized through the heat exchange cooperation between the first heat exchange flow path 11, the second heat exchange flow path 12 and the power battery 200, which can not only improve the efficiency of the battery thermal management system 100, but also enhance the adaptability and reliability of the battery thermal management system 100, but also improve the thermal management efficiency of the power battery 200, and also helps to extend the service life and performance stability of the power battery 200.

[0058] In some embodiments of the present invention, such as Figure 1As shown, the first heat exchange flow path 11 has a first radiator 113 and a first pump 114 connected in series. Along the flow direction of the heat exchange medium in the first heat exchange flow path 11, the first pump 114 is located on the downstream side of the first radiator 113.

[0059] Among them, the first radiator 113 is a key component in the first heat exchange flow path 11, which is used to dissipate the heat absorbed by the heat exchange medium in the first heat exchange flow path 11 from the power battery 200 to the external environment (or can also be used for other components in the vehicle that require heat). The first heat exchange flow path 11 also has a first fan 62. The first fan 62 cooperates with the first radiator 113. The first fan 62 can drive the air to flow, form forced convection, accelerate the heat dissipation speed of the first radiator 113, and then can quickly reduce the temperature of the heat exchange medium in the first heat exchange flow path 11. Along the flow direction of the heat exchange medium in the first heat exchange flow path 11, the first pump 114 is located on the downstream side of the first radiator 113. The first pump 114 is responsible for pumping the cooled heat exchange medium back to the power battery 200 again, so that the cooled heat exchange medium flows through the power battery 200 again for heat exchange, which can effectively control the flow direction and temperature of the heat exchange medium in the first heat exchange flow path 11, help improve the heat exchange efficiency of the battery thermal management system 100, and ensure the stable operation of the battery thermal management system 100.

[0060] In some embodiments of the present invention, as Figure 1 shown, the second heat exchange flow path outlet 122 can be connected to the first heat exchange flow path 11. Along the flow direction of the heat exchange medium in the first heat exchange flow path 11, the connection point of the second heat exchange flow path 122 and the first heat exchange flow path 11 is located on the upstream side of the first pump 114, so that the heat exchange medium in the second heat exchange flow path 12 converges with the heat exchange medium in the first heat exchange flow path 11 before entering the first pump 114, which can make the temperature of the converged heat exchange medium more uniform. The converged heat exchange medium flows into the first pump 114 from the first heat exchange flow path 11, and then is pumped by the first pump 114 to the power battery 200 for heat exchange with the power battery 200, which is beneficial to more efficient heat transfer between the heat exchange medium and the power battery 200, and can also avoid uneven heat exchange of the power battery 200, helping to improve the service life of the power battery 200. And because the heat exchange medium has undergone preliminary heat exchange when converging, its temperature and pressure are more suitable for the working conditions of the first pump 114, which helps to reduce the energy consumption and wear of the first pump 114, and improve its working efficiency and life.

[0061] In some embodiments of the present invention, as Figure 1As shown, the fuel cell heat exchange flow path 20 may include: a third heat exchange flow path 21 and a fourth heat exchange flow path 22. The third heat exchange flow path inlet 211 of the third heat exchange flow path 21 is selectively connected to the fuel cell 300, and the third heat exchange flow path outlet 212 of the third heat exchange flow path 21 is connected to the fuel cell 300. The fourth heat exchange flow path inlet 221 of the fourth heat exchange flow path 22 is selectively connected to the fuel cell 300, and the fourth heat exchange flow path outlet 222 of the fourth heat exchange flow path 22 is connected to the fuel cell 300. The fourth heat exchange flow path 22 is used for heat exchange with the air-conditioning circulation flow path 30.

[0062] Among them, the third heat exchange flow path inlet 211 of the third heat exchange flow path 21 and the fuel cell 300 can be connected through a valve (such as a solenoid valve, a three-way valve, etc.) so that the third heat exchange flow path inlet 211 of the third heat exchange flow path 21 is selectively connected to the fuel cell 300. Specifically, when the third heat exchange flow path inlet 211 of the third heat exchange flow path 21 is connected to the fuel cell 300 and the third heat exchange flow path outlet 212 of the third heat exchange flow path 21 is connected to the fuel cell 300, a complete heat exchange loop is formed in the third heat exchange flow path 21, and then the third heat exchange flow path 21 is connected to the fuel cell 300 for heat exchange with the fuel cell 300. By precisely controlling whether the third heat exchange flow path 21 is connected to the fuel cell 300, precise management of the temperature of the fuel cell 300 can be achieved, ensuring that the fuel cell 300 is at an appropriate operating temperature, and thus improving the operating performance and safety of the fuel cell 300.

[0063] The fourth heat exchange flow path inlet 221 of the fourth heat exchange flow path 22 and the fuel cell 300 can be connected through a valve (such as a solenoid valve, a three-way valve, etc.) so that the fourth heat exchange flow path inlet 221 of the fourth heat exchange flow path 22 is selectively connected to the fuel cell 300. Specifically, when the heat of the fuel cell 300 is too large and the heat exchange between the fuel cell 300 and the fuel cell 300 through only the third heat exchange flow path 21 cannot meet the heat exchange requirements of the fuel cell 300, the fourth heat exchange flow path inlet 221 of the fourth heat exchange flow path 22 can be connected to the fuel cell 300. Then, part of the heat exchange medium flowing through the fuel cell 300 flows into the fourth heat exchange flow path 22 from the fourth heat exchange flow path inlet 221. When the fourth heat exchange flow path outlet 222 of the fourth heat exchange flow path 22 is connected to the fuel cell 300, a complete heat exchange loop is formed in the fourth heat exchange flow path 22. The fourth heat exchange flow path 22 is used for heat exchange with the air-conditioning circulation flow path 30, enabling the refrigerant medium in the air-conditioning circulation flow path 30 to absorb the heat of the heat exchange medium in the fourth heat exchange flow path 22. The cooled heat exchange medium in the fourth heat exchange flow path 22 flows through the fuel cell 300 again to further cool the fuel cell 300 to ensure that the operating temperature of the fuel cell 300 is appropriate.

[0064] With such a setting, the fourth heat exchange flow path 22 serves as an auxiliary heat exchange flow path of the fuel cell 300. According to the actual heat condition of the fuel cell 300, the fourth heat exchange flow path 22 can be selectively connected or closed, which not only improves the heat dissipation efficiency of the fuel cell 300, but also makes full use of the resources of the vehicle interior air conditioning system. According to the actual temperature requirement of the fuel cell 300, the configuration of the heat exchange flow path can be flexibly adjusted, so as to ensure that the fuel cell 300 always operates within a suitable temperature range, and further improve the stability and safety of the battery thermal management system 100.

[0065] In some embodiments of the present invention, as Figure 1 shown, the battery thermal management system 100 may further include: a second three-way valve 50, the second three-way valve 50 having a fourth valve port 51, a fifth valve port 52 and a sixth valve port 53, the fourth valve port 51 being used for communicating with the fuel cell 300, the fifth valve port 52 being communicated with the third heat exchange flow path inlet 211, and the sixth valve port 53 being communicated with the fourth heat exchange flow path inlet 221; and / or

[0066] The air conditioning circulation flow path 30 may have a heat exchanger 32, the heat exchanger 32 and the fourth heat exchange flow path 22 are assembled in cooperation, and the refrigerant medium in the heat exchanger 32 exchanges heat with the fourth heat exchange flow path 22.

[0067] Wherein, the fourth valve port 51 is used for communicating with the fuel cell 300, the fifth valve port 52 is communicated with the third heat exchange flow path inlet 211, and the sixth valve port 53 is communicated with the fourth heat exchange flow path inlet 221. By controlling the opening and closing of the fourth valve port 51, the fifth valve port 52 and the sixth valve port 53, the fuel cell 300 can be selectively communicated with both the third heat exchange flow path inlet 211 and the fourth heat exchange flow path inlet 221, and the connection between the fuel cell 300 and the third heat exchange flow path 21 and the fourth heat exchange flow path 22 can be flexibly controlled according to the heat amount of the fuel cell 300. Thus, through the heat exchange cooperation between the third heat exchange flow path 21, the fourth heat exchange flow path 22 and the fuel cell 300, the temperature of the fuel cell 300 can be accurately controlled, which not only improves the efficiency of the battery thermal management system 100, but also enhances the adaptability and reliability of the battery thermal management system 100.

[0068] Or, a refrigerant medium flows in the heat exchanger 32, the heat exchanger 32 and the fourth heat exchange flow path 22 are assembled in cooperation, and the refrigerant medium in the heat exchanger 32 exchanges heat with the fourth heat exchange flow path 22, which can enable the refrigerant medium to absorb the heat of the heat exchange medium in the fourth heat exchange flow path 22. The cooled heat exchange medium in the fourth heat exchange flow path 22 flows through the fuel cell 300 again through the fourth heat exchange flow path 22, which can further cool the fuel cell 300 to ensure that the fuel cell 300 is at a suitable operating temperature, not only improving the thermal management efficiency of the fuel cell 300, but also helping to extend the service life and performance stability of the fuel cell 300.

[0069] Alternatively, the battery thermal management system 100 includes a second three-way valve 50 having a fourth valve port 51, a fifth valve port 52, and a sixth valve port 53. The fourth valve port 51 is used to communicate with the fuel cell 300. The fifth valve port 52 communicates with the inlet 211 of the third heat exchange flow path. The sixth valve port 53 communicates with the inlet 221 of the fourth heat exchange flow path. And the air-conditioning circulation flow path 30 may have a heat exchanger 32. The heat exchanger 32 and the fourth heat exchange flow path 22 are assembled in cooperation. The refrigerant medium in the heat exchanger 32 exchanges heat with the fourth heat exchange flow path 22. It can not only precisely control the temperature of the fuel cell 300 through the heat exchange cooperation between the third heat exchange flow path 21 and the fourth heat exchange flow path 22 with the fuel cell 300, but also improve the efficiency of the battery thermal management system 100, enhance the adaptability and reliability of the battery thermal management system 100, improve the thermal management efficiency of the fuel cell 300, and help extend the service life and performance stability of the fuel cell 300.

[0070] In some embodiments of the present invention, as Figure 1 shown, the third heat exchange flow path 21 may have a second radiator 213 and a second pump 214 connected in series. Along the flow direction of the heat exchange medium in the third heat exchange flow path 21, the second pump 214 is located on the downstream side of the second radiator 213. The outlet 222 of the fourth heat exchange flow path may communicate with the third heat exchange flow path 21. Along the flow direction of the heat exchange medium in the third heat exchange flow path 21, the connection point of the outlet 222 of the fourth heat exchange flow path and the third heat exchange flow path 21 is located on the upstream side of the second pump 214.

[0071] Among them, the second radiator 213 is a key component in the third heat exchange flow path 21, which is used to dissipate the heat absorbed by the heat exchange medium in the third heat exchange flow path 21 from the fuel cell 300 to the external environment (or it can also be used for other components in the vehicle that need heat). The third heat exchange flow path 21 also has a second fan 63. The second fan 63 cooperates with the second radiator 213. The second fan 63 can drive the air to flow, form forced convection, and accelerate the heat dissipation speed of the second radiator 213, thereby being able to quickly reduce the temperature of the heat exchange medium in the third heat exchange flow path 21. Along the flow direction of the heat exchange medium in the third heat exchange flow path 21, the second pump 214 is located on the downstream side of the second radiator 213. The second pump 214 is responsible for pumping the cooled heat exchange medium back to the fuel cell 300 again, so that the cooled heat exchange medium flows through the fuel cell 300 again for heat exchange, which can effectively control the flow direction and temperature of the heat exchange medium in the third heat exchange flow path 21, help improve the heat exchange efficiency of the battery thermal management system 100, and ensure the stable operation of the battery thermal management system 100.

[0072] The outlet 222 of the fourth heat exchange flow path can be connected to the third heat exchange flow path 21. Along the flow direction of the heat exchange medium in the third heat exchange flow path 21, the connection point of the outlet 222 of the fourth heat exchange flow path and the third heat exchange flow path 21 is located upstream of the second pump body 214, so that the heat exchange medium in the fourth heat exchange flow path 22 converges with the heat exchange medium in the third heat exchange flow path 21 before entering the second pump body 214, which can make the temperature of the converged heat exchange medium more uniform. The converged heat exchange medium flows into the second pump body 214 from the third heat exchange flow path 21, and then is pumped by the second pump body 214 to the fuel cell 300 for heat exchange with the fuel cell 300, which is beneficial to more efficient heat transfer between the heat exchange medium and the fuel cell 300, and can also avoid uneven heat exchange of the fuel cell 300, helping to extend the service life of the fuel cell 300. And because the heat exchange medium has undergone preliminary heat exchange when converging, its temperature and pressure are more suitable for the working conditions of the second pump body 214, which helps to reduce the energy consumption and wear of the second pump body 214 and improve its working efficiency and service life.

[0073] In some embodiments of the present invention, as Figure 1 shown, the battery thermal management system 100 may further include: a first expansion water tank 60 and a second expansion water tank 61. The power battery heat exchange flow path 10 is connected to the first expansion water tank 60, and the fuel cell heat exchange flow path 20 is connected to the second expansion water tank 61.

[0074] Among them, the power battery heat exchange flow path 10 is connected to the first expansion water tank 60. The first expansion water tank 60 can prevent the heat exchange medium in the power battery heat exchange flow path 10 from boiling at high temperatures. When the temperature of the heat exchange medium reaches the boiling point, the heat exchange medium expands and flows into the first expansion water tank 60 without generating bubbles or splashing, protecting the power battery 200 from damage. It can also separate water and steam in the battery thermal management system 100, maintain the pressure stability in the battery thermal management system 100, and can also improve the working efficiency of the first pump body 114.

[0075] The fuel cell heat exchange flow path 20 is connected to the second expansion water tank 61. The second expansion water tank 61 can prevent the heat exchange medium in the fuel cell heat exchange flow path 20 from boiling at high temperatures. When the temperature of the heat exchange medium reaches the boiling point, the heat exchange medium expands and flows into the second expansion water tank 61 without generating bubbles or splashing, protecting the fuel cell 300 from damage. It can also separate water and steam in the battery thermal management system 100, maintain the pressure stability in the battery thermal management system 100, and can also improve the working efficiency of the second pump body 214.

[0076] In some embodiments of the present invention, as Figure 1As shown, the air-conditioning circulation flow path 30 may further include a compressor 33, a condenser 34, and an expansion valve 35. Along the flow direction of the refrigerant medium in the air-conditioning circulation flow path 30, the cooler 31 is located upstream of the heat exchanger 32, and the compressor 33, the condenser 34, and the expansion valve 35 are arranged in sequence downstream of the heat exchanger 32. When the second heat exchange flow path 12 is used to exchange heat with the air-conditioning circulation flow path 30 and the fourth heat exchange flow path 22 is used to exchange heat with the air-conditioning circulation flow path 30, along the flow direction of the refrigerant medium, the refrigerant medium in the air-conditioning circulation flow path 30 first exchanges heat with the heat exchange medium in the second heat exchange flow path 12, and then flows into the heat exchanger 32 to exchange heat with the heat exchange medium in the fourth heat exchange flow path 22, so that the refrigerant medium with a higher temperature and pressure enters the compressor 33, which can reduce the working load of the compressor 33. The refrigerant medium becomes a high-temperature and high-pressure gas after passing through the compressor 33. The high-temperature and high-pressure gas releases heat through cooling in the condenser 34 to the environment, or the heat can also be used for other components of the vehicle. At the same time, the high-temperature and high-pressure gas becomes a high-pressure liquid. The high-pressure liquid passes through the expansion valve 35 to throttle and depressurize and then becomes a low-temperature and low-pressure refrigerant medium again to enter the cooler 31 and the heat exchanger 32 to start a new heat exchange cycle.

[0077] The air-conditioning circulation flow path 30 may further include a third fan 64. The third fan 64 is used in cooperation with the condenser 34. The third fan 64 can drive the air to flow, form forced convection, and accelerate the cooling of the refrigerant medium.

[0078] Thus, by the refrigerant medium in the air-conditioning circulation flow path 30 absorbing the heat of the heat exchange medium in the power battery heat exchange flow path 10 and the fuel cell heat exchange flow path 20, the temperature and pressure of the refrigerant medium can be increased before the refrigerant medium enters the compressor 33, and then the waste heat of the power battery 200 and the fuel cell 300 can be effectively utilized to reduce the working load of the compressor 33, so as to reduce the power of the compressor 33. And because the air-conditioning circulation flow path 30 assists in dissipating heat from the power battery 200 and the fuel cell 300, it is beneficial to reduce the working duration and power of the first radiator 113, the first fan 62, the second radiator 213, and the second fan 63 (the first radiator 113, the first fan 62, the second radiator 213, and the second fan 63 are all powered by the power battery 200 and the fuel cell 300). Furthermore, the energy consumption of the power battery 200 and the fuel cell 300 can be reduced, and the power battery 200 and the fuel cell 300 are also prevented from working in the high-heat and low-efficiency range, which is beneficial to improving the thermal efficiency of the battery thermal management system 100.

[0079] Moreover, the battery thermal management system 100 of the present application has a simple composition and high integration, reducing the complexity of the battery thermal management system 100.

[0080] A vehicle according to an embodiment of the present invention includes the battery thermal management system 100 for a vehicle in the above embodiment, which can enable the power battery 200 and the fuel cell 300 to be in an environment with a suitable temperature, thereby improving the safety of the vehicle. The heat of the power battery 200 and the fuel cell 300 can also be used for other components of the vehicle, thereby reducing the energy consumption of the vehicle and improving the utilization rate of the overall vehicle energy.

[0081] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0082] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery thermal management system for a vehicle, characterized in that: The vehicle includes a power battery and a fuel cell, and the battery thermal management system includes: A power battery heat exchange flow path, the power battery heat exchange flow path is used to communicate with the power battery to exchange heat with the power battery; A fuel cell heat exchange flow path, the fuel cell heat exchange flow path is used to communicate with the fuel cell to exchange heat with the fuel cell; The air conditioning circulation flow path, the heat exchange medium in the power battery heat exchange flow path selectively exchanges heat with the air conditioning circulation flow path to adjust the temperature of the heat exchange medium in the power battery heat exchange flow path, and the heat exchange medium in the fuel cell heat exchange flow path selectively exchanges heat with the air conditioning circulation flow path to adjust the temperature of the heat exchange medium in the fuel cell heat exchange flow path.

2. The battery thermal management system for a vehicle according to claim 1, characterized in that: The power battery heat exchange flow path includes: a first heat exchange flow path and a second heat exchange flow path, wherein a first heat exchange flow path inlet of the first heat exchange flow path is selectively connected to the power battery, and a first heat exchange flow path outlet of the first heat exchange flow path is connected to the power battery; A second heat exchange flow path inlet of the second heat exchange flow path is selectively connected to the power battery, a second heat exchange flow path outlet of the second heat exchange flow path is connected to the power battery, and the second heat exchange flow path is used for exchanging heat with the air conditioning circulation flow path.

3. The battery thermal management system for a vehicle according to claim 2, characterized in that: Also includes: A first three-way valve, wherein the first three-way valve has a first valve port, a second valve port and a third valve port, wherein the first valve port is used to communicate with the power battery, the second valve port is communicated with the first heat exchange flow path inlet, and the third valve port is communicated with the second heat exchange flow path inlet; and / or The air conditioning circulation flow path has a cooler, and the cooler and the second heat exchange flow path are assembled in cooperation, and the refrigerant in the cooler cooperates with the second heat exchange flow path in heat exchange.

4. The battery thermal management system for a vehicle according to claim 2, characterized in that: The first heat exchange flow path has a first radiator and a first pump body connected in series. Along the flow direction of the heat exchange medium in the first heat exchange flow path, the first pump body is located at the downstream side of the first radiator.

5. The battery thermal management system for a vehicle according to claim 4, characterized in that: The second heat exchange flow path outlet is connected to the first heat exchange flow path, and along the flow direction of the heat exchange medium in the first heat exchange flow path, the connection point between the second heat exchange flow path outlet and the first heat exchange flow path is located on the upstream side of the first pump body.

6. The battery thermal management system for a vehicle according to any one of claims 1 to 5, characterized in that: The fuel cell heat exchange flow path includes: a third heat exchange flow path and a fourth heat exchange flow path, a third heat exchange flow path inlet of the third heat exchange flow path is selectively connected to the fuel cell, and a third heat exchange flow path outlet of the third heat exchange flow path is connected to the fuel cell; A fourth heat exchange flow path inlet of the fourth heat exchange flow path is selectively connected to the fuel cell, a fourth heat exchange flow path outlet of the fourth heat exchange flow path is connected to the fuel cell, and the fourth heat exchange flow path is used for heat exchange with the air conditioning circulation flow path.

7. The battery thermal management system for a vehicle according to claim 6, characterized in that: Also includes: a second three-way valve, the second three-way valve having a fourth valve port, a fifth valve port and a sixth valve port, the fourth valve port being used to communicate with the fuel cell, the fifth valve port being communicated with the third heat exchange flow path inlet, and the sixth valve port being communicated with the fourth heat exchange flow path inlet; and / or The air conditioning circulation flow path has a heat exchanger, and the heat exchanger and the fourth heat exchange flow path are assembled in coordination, and the refrigerant in the heat exchanger cooperates with the fourth heat exchange flow path in heat exchange.

8. The battery thermal management system for a vehicle according to claim 6, characterized in that: The third heat exchange flow path has a second radiator and a second pump body connected in series, and along the flow direction of the heat exchange medium in the third heat exchange flow path, the second pump body is located at the downstream side of the second radiator; The fourth heat exchange flow path outlet is connected to the third heat exchange flow path, and along the flow direction of the heat exchange medium in the third heat exchange flow path, the connection point between the fourth heat exchange flow path outlet and the third heat exchange flow path is located on the upstream side of the second pump body.

9. The battery thermal management system for a vehicle according to claim 1, characterized in that: Also includes: A first expansion kettle and a second expansion kettle, the power battery heat exchange flow path is connected to the first expansion kettle, and the fuel cell heat exchange flow path is connected to the second expansion kettle.

10. A vehicle, comprising the battery thermal management system for the vehicle according to any one of claims 1 to 9.

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