Battery direct liquid double cold plate structure and direct liquid double cold thermal management system thereof

Abstract

The present application relates to the technical field of battery management, and particularly relates to a battery direct-liquid double-cooling plate structure and a direct-liquid double-cooling thermal management system thereof. The battery direct-liquid double-cooling plate structure comprises a passenger cabin air conditioning circuit, a battery liquid cooling circuit and a motor circuit. The passenger cabin air conditioning circuit is located at one end of the battery liquid cooling circuit, and the motor circuit is located at the top of the battery liquid cooling circuit. The passenger cabin air conditioning circuit comprises a compressor, a liquid storage tank, a first expansion valve, an evaporator, a second expansion valve and a battery direct-liquid double-cooling plate. The bottom of the compressor is connected with the liquid storage tank. The battery direct-liquid double-cooling plate structure and the direct-liquid double-cooling thermal management system thereof can simultaneously use refrigerant and cooling liquid to cool the battery at high temperature and heat the battery at low temperature through effective arrangement of irregular cooling pipelines, and can solve the use of the direct-cooling thermal management system under normal temperature environment and low load working condition, the use of the liquid-cooling thermal management system under high temperature environment and high load working condition, and economy.

Description

Technical Field

[0001] This invention relates to the field of battery management technology, and in particular to a battery direct liquid dual cooling plate structure and its direct liquid dual cooling thermal management system. Background Technology

[0002] Existing direct-cooling thermal management systems exhibit good temperature control capabilities under complex temperature environments and high-load battery conditions. However, their operation consumes energy to maintain a suitable operating temperature. While direct cooling systems ensure battery thermal safety under high-temperature and high-load conditions, their continued use becomes less economical for power batteries under normal temperature and low-load conditions due to the characteristics of the coolant. Furthermore, direct-cooling thermal management systems suffer from flow instability leading to backflow, uneven flow distribution, and consequently, dry-burning issues.

[0003] Existing liquid-cooled thermal management systems exhibit good temperature control characteristics in normal temperature environments and low-load conditions due to the properties of their coolant. However, their cooling performance is greatly reduced in high-temperature environments and high-load conditions. In addition, the system needs to consume a lot of energy to maintain a suitable coolant temperature in high-temperature environments and high-load conditions.

[0004] Regardless of whether it is a direct cooling system or a liquid cooling system, the battery temperature gradually rises with the flow of coolant or coolant, and the battery temperature is greatly affected by the arrangement of cooling pipes.

[0005] To address this issue, we designed a battery direct liquid dual cooling plate structure and its direct liquid dual cooling thermal management system to provide an alternative technical solution. Summary of the Invention

[0006] Therefore, it is necessary to provide a battery direct liquid dual cooling plate structure and its direct liquid dual cooling thermal management system to address the technical problems mentioned in the background.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A direct liquid dual-cooling thermal management system includes a passenger compartment air conditioning circuit, a battery liquid cooling circuit, and a motor circuit. The passenger compartment air conditioning circuit is located at one end of the battery liquid cooling circuit, and the motor circuit is located at the top of the battery liquid cooling circuit.

[0009] The passenger compartment air conditioning circuit includes a compressor, a liquid receiver, a first expansion valve, an evaporator, a second expansion valve, and a battery direct-liquid dual-cooling plate. The bottom of the compressor is connected to the liquid receiver, the bottom of the liquid receiver is connected to the evaporator and the battery direct-liquid dual-cooling plate, and the battery direct-liquid dual-cooling plate is located at one end of the evaporator. The top of the evaporator is connected to the first expansion valve, the top of the first expansion valve is connected to the third four-way valve, the top of the battery direct-liquid dual-cooling plate is connected to the second expansion valve, and the second expansion valve is connected to the third four-way valve.

[0010] In a preferred embodiment of the direct-liquid dual-cooling and heating management system provided by the present invention, the passenger compartment air conditioning circuit includes a first four-way valve, a second four-way valve, a condenser, a heat exchanger, and a third four-way valve. The top of the compressor is connected to the second four-way valve, and the bottom of the second four-way valve is connected to the first four-way valve. The top of one end of the first four-way valve is connected to the compressor, the bottom of one end of the first four-way valve is connected to the liquid storage tank, and the bottom of the other end of the first four-way valve is connected to the battery direct-liquid dual-cooling plate. The top of the second four-way valve is connected to the heat exchanger, and the heat exchanger is connected to the third four-way valve. One end of the second four-way valve is connected to the condenser, and the condenser is connected to the third four-way valve.

[0011] In a preferred embodiment of the direct liquid dual cooling and thermal management system provided by the present invention, the battery liquid cooling circuit includes a battery water pump, a first three-way valve, a first radiator, a PTC heater, and a fourth four-way valve. The top of one end of the battery direct liquid dual cooling plate is connected to the battery water pump, the top of the battery water pump is connected to the fourth four-way valve, the bottom of one end of the battery direct liquid dual cooling plate is connected to the first three-way valve, the bottom of the first three-way valve is connected to the first radiator, and the first radiator is connected to the fourth four-way valve. One end of the first three-way valve is connected to the PTC heater, and the PTC heater is connected to the first radiator.

[0012] In a preferred embodiment of the direct-liquid dual-cooling and heating management system provided by the present invention, the motor circuit includes a second three-way valve, a motor water pump, a DC-DC heat exchanger, an MCU heat exchanger, a drive motor heat exchanger, and a second radiator. The top of the second radiator is connected to the second three-way valve, and the bottom of the second radiator is connected to a heat exchanger. The top of one end of the heat exchanger is connected to a fourth four-way valve, and one end of the fourth four-way valve is connected to the second three-way valve. A drive motor heat exchanger is connected between the second radiator and the heat exchanger. The bottom of the second three-way valve is connected to the motor water pump, the bottom of the motor water pump is connected to the DC-DC heat exchanger, the bottom of the DC-DC heat exchanger is connected to the MCU heat exchanger, and the bottom of the MCU heat exchanger is connected to the drive motor heat exchanger.

[0013] In a preferred embodiment of the direct liquid dual cooling and heating management system provided by the present invention, a compensation water tank is connected between the fourth four-way valve and the second three-way valve.

[0014] A battery direct-liquid dual-cooling plate structure is provided for any of the above. The battery direct-liquid dual-cooling plate includes a cooling plate body. A direct cooling outlet and a liquid cooling outlet are provided inside one end of the cooling plate body, and the direct cooling outlet is located at the top of the liquid cooling outlet. A direct cooling inlet and a liquid cooling inlet are provided inside the other end of the cooling plate body, and the liquid cooling inlet is located at the bottom of the direct cooling inlet.

[0015] In a preferred embodiment of the battery direct liquid dual cooling plate structure provided by the present invention, the direct cooling outlet and the direct cooling inlet form a direct cooling flow channel, and the liquid cooling outlet and the liquid cooling inlet form a liquid cooling flow channel.

[0016] In a preferred embodiment of the battery direct liquid dual cooling plate structure provided by the present invention, the width of the direct cooling outlet is greater than the width of the direct cooling inlet, and the width of the direct cooling channel gradually decreases from the direct cooling outlet to the direct cooling inlet.

[0017] The width of the liquid cooling outlet is smaller than the width of the liquid cooling inlet, and the width of the liquid cooling channel gradually increases from the liquid cooling outlet to the liquid cooling inlet.

[0018] As a preferred embodiment of the battery direct liquid dual cooling plate structure provided by the present invention, the liquid cooling channel includes an end plate, a thermal pad, an upper end plate and a battery. Both ends of the bottom of the upper end plate are fixed with end plates, the bottom of the two end plates are fixed with thermal pads, and the bottom of the thermal pads is fixed with the battery.

[0019] It is clear without a doubt that the technical solution described above in this application can solve the technical problem that this application aims to address.

[0020] Meanwhile, through the above technical solutions, the present invention has at least the following beneficial effects:

[0021] This invention provides a battery direct-liquid dual-cooling plate structure and its direct-liquid dual-cooling thermal management system. Through the effective arrangement of irregular cooling pipes in the battery direct-liquid dual-cooling plate structure, both refrigerant and coolant can be used simultaneously to cool the battery at high temperatures and heat it at low temperatures. This solves the problems of using the direct-cooling thermal management system in normal temperature environments and low-load conditions, and using the liquid-cooling thermal management system in high-temperature environments and high-load conditions, as well as its economic efficiency.

[0022] By utilizing the direct-liquid dual-cooling thermal management system under the battery direct-liquid dual-cooling plate structure, the waste heat of the motor, PTC auxiliary heating, and multi-way valves are considered to simplify the vehicle thermal management system, ensure the vehicle's economy, and reduce the vehicle's energy consumption by utilizing the battery direct-liquid dual-cooling plate structure and combining it with PTC auxiliary heating.

[0023] The battery's direct-cooling dual-cooling plate structure and operating principle are simple. The direct-cooling thermal management system and the liquid-cooling thermal management system work together to solve the problems of the direct-cooling thermal management system's use in normal temperature environments and low-load conditions, and the liquid-cooling thermal management system's use in high-temperature environments and high-load conditions, while also ensuring economic efficiency. Furthermore, by designing the direct-cooling flow channel as an irregular flow channel, the problems of backflow and dry burning caused by unstable flow in the direct-cooling system are solved; as well as the problem of coolant temperature variations in the liquid-cooling system, the maximum battery temperature is reduced, ensuring battery temperature uniformity. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a top view of the battery direct liquid dual cooling plate structure of the present invention;

[0026] Figure 2 This is a left sectional view of the battery direct liquid dual cooling plate structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the installation of the battery direct liquid dual cooling plate structure of the present invention;

[0028] Figure 4 This is a schematic diagram of the direct liquid dual cooling and heating management system of the present invention.

[0029] In the diagram: 1. Compressor; 2. Liquid receiver; 3. First four-way valve; 4. Second four-way valve; 5. Condenser; 6. Heat exchanger; 7. Third four-way valve; 8. First expansion valve; 9. Evaporator; 10. Second expansion valve; 11. Battery direct-liquid double cooling plate; 12. Battery water pump; 13. First three-way valve; 14. First radiator; 15. PTC heater; 16. Fourth four-way valve; 17. Compensation tank; 18. Second three-way valve; 19. Motor water pump; 20. DC-DC heat exchanger Components; 21. MCU heat exchanger; 22. Drive motor heat exchanger; 23. Second heat sink; 200. Passenger compartment air conditioning circuit; 300. Battery liquid cooling circuit; 400. Motor circuit; 101. Direct cooling outlet; 102. Direct cooling inlet; 103. Liquid cooling outlet; 104. Liquid cooling inlet; 105. Cold plate body; 1001. Direct cooling channel; 1002. Liquid cooling channel; 1003. End plate; 1004. Thermal pad; 1005. Upper end plate; 1006. Battery. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0031] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0032] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] Example 1

[0035] Reference Figure 4 A direct liquid dual cooling thermal management system is disclosed, including a passenger compartment air conditioning circuit 200, a battery liquid cooling circuit 300 and a motor circuit 400. The passenger compartment air conditioning circuit 200 is located at one end of the battery liquid cooling circuit 300, and the motor circuit 400 is located at the top of the battery liquid cooling circuit 300.

[0036] The passenger compartment air conditioning circuit 200 includes a compressor 1, a liquid receiver 2, a first four-way valve 3, a second four-way valve 4, a condenser 5, a heat exchanger 6, a third four-way valve 7, a first expansion valve 8, an evaporator 9, a second expansion valve 10, and a battery direct liquid dual cooling plate 11. The bottom of the compressor 1 is connected to the liquid receiver 2, the bottom of the liquid receiver 2 is connected to the evaporator 9 and the battery direct liquid dual cooling plate 11, and the battery direct liquid dual cooling plate 11 is located at one end of the evaporator 9. The top of the evaporator 9 is connected to the first expansion valve 8, the top of the first expansion valve 8 is connected to the third four-way valve 7, the third four-way valve 7 has four interfaces: 1, 2, 3, and 4, and the first expansion valve 8 is connected to interface 2 on the third four-way valve 7.

[0037] The top of the battery direct liquid double cooling plate 11 is connected to a second expansion valve 10, which is connected to a third four-way valve 7, so that the second expansion valve 10 is connected to the 3 port on the third four-way valve 7. The top of the compressor 1 is connected to a second four-way valve 4, which has four ports: 1, 2, 3, and 4. The compressor 1 is connected to port 1 on the second four-way valve 4.

[0038] The bottom of the second four-way valve 4 is connected to the first four-way valve 3. The first four-way valve 3 has four ports: 1, 2, 3, and 4. Port 2 on the second four-way valve 4 is connected to port 2 on the first four-way valve 3. The top of one end of the first four-way valve 3 is connected to the compressor 1, the bottom of one end of the first four-way valve 3 is connected to the liquid storage tank 2, and the bottom of the other end of the first four-way valve 3 is connected to the battery direct liquid double cooling plate 11. This makes the compressor 1 connected to port 1 on the first four-way valve 3, the liquid storage tank 2 connected to port 3 on the first four-way valve 3, and the battery direct liquid double cooling plate 11 connected to port 4 on the first four-way valve 3.

[0039] The top of the second four-way valve 4 is connected to a heat exchanger 6, and the heat exchanger 6 is connected to the third four-way valve 7, so that the heat exchanger 6 is connected to the 4 port on the second four-way valve 4, and the heat exchanger 6 is connected to the 4 port on the third four-way valve 7. One end of the second four-way valve 4 is connected to a condenser 5, and the condenser 5 is connected to the third four-way valve 7, so that the condenser 5 is connected to the 3 port on the second four-way valve 4, and the condenser 5 is connected to the 1 port on the third four-way valve 7.

[0040] The battery liquid cooling circuit 300 includes a battery water pump 12, a first three-way valve 13, a first radiator 14, a PTC heater 15, and a fourth four-way valve 16. The top of one end of the battery direct liquid cooling plate 11 is connected to the battery water pump 12, and the top of the battery water pump 12 is connected to the fourth four-way valve 16. The fourth four-way valve 16 has four interfaces: 1, 2, 3, and 4. The battery water pump 12 is connected to interface 1 of the fourth four-way valve 16. The bottom of one end of the battery direct liquid cooling plate 11 is connected to the first three-way valve 13, and the first three-way valve 13 has three interfaces: 1, 2, and 3. The battery direct liquid cooling plate 11 is connected to interface 1 of the first three-way valve 13.

[0041] The bottom of the first three-way valve 13 is connected to the first radiator 14, and the first radiator 14 is connected to the fourth four-way valve 16, so that the first radiator 14 is connected to the 2 port of the first three-way valve 13 and the 2 port of the fourth four-way valve 16. One end of the first three-way valve 13 is connected to the PTC heater 15, and the PTC heater 15 is connected to the first radiator 14 to form a parallel connection, so that the PTC heater 15 is connected to the 3 port of the first three-way valve 13.

[0042] The motor circuit 400 includes a compensation water tank 17, a second three-way valve 18, a motor water pump 19, a DC-DC heat exchanger 20, an MCU heat exchanger 21, a drive motor heat exchanger 22, and a second radiator 23. The top of the second radiator 23 is connected to the second three-way valve 18, which has three interfaces: 1, 2, and 3. The second radiator 23 is connected to interface 1 of the second three-way valve 18, and the bottom of the second radiator 23 is connected to the heat exchanger 6, thereby exchanging heat through the heat exchanger 6.

[0043] The top of one end of the heat exchanger 6 is connected to the fourth four-way valve 16, so that the heat exchanger 6 is connected to the 3 port of the fourth four-way valve 16. One end of the fourth four-way valve 16 is connected to the second three-way valve 18, so that the 4 port of the fourth four-way valve 16 is connected to the 2 port of the second three-way valve 18. A compensation water tank 17 is connected between the fourth four-way valve 16 and the second three-way valve 18.

[0044] A drive motor heat exchange component 22 is connected between the second radiator 23 and the heat exchanger 6. A motor water pump 19 is connected to the bottom of the second three-way valve 18, so that the motor water pump 19 is connected to the 3 interface of the second three-way valve 18. A DC-DC heat exchange component 20 is connected to the bottom of the motor water pump 19. An MCU heat exchange component 21 is connected to the bottom of the DC-DC heat exchange component 20. The bottom of the MCU heat exchange component 21 is connected to the drive motor heat exchange component 22.

[0045] The direct-cooling and liquid-cooling dual-cooling thermal management system provided in this embodiment controls the passenger compartment air conditioning circuit 200 through the first four-way valve 3, realizing the heating and cooling of the passenger compartment air conditioning circuit 200; the passenger compartment air conditioning circuit 200 and the motor circuit 400 can be coupled through the second four-way valve 4 and the third four-way valve 7 to realize the utilization of the motor's waste heat; the battery liquid cooling circuit 300 and the motor circuit 400 can be connected through the fourth four-way valve 16 to realize the utilization of the motor's waste heat, and the PTC heater 15 is used for auxiliary heating of the battery liquid cooling circuit 300; thus, it fully considers the advantages and disadvantages of the direct cooling system and the liquid cooling system of the pure electric vehicle battery under extreme ambient temperatures, as well as the temperature uniformity problem when the power battery is cooling and heating. By effectively arranging irregular cooling pipes, it can simultaneously use refrigerant and coolant to cool the battery at high temperatures and heat it at low temperatures, solving the problem of the use of the direct cooling thermal management system in normal temperature environment and low load conditions, and the use of the liquid cooling thermal management system in high temperature environment and high load conditions.

[0046] Example 2

[0047] Reference Figures 1-3 A battery direct-cooling dual-cooling plate structure is disclosed. The battery direct-cooling dual-cooling plate 11 includes a cooling plate body 105. A direct cooling outlet 101 and a liquid cooling outlet 103 are formed inside one end of the cooling plate body 105, with the direct cooling outlet 101 located at the top of the liquid cooling outlet 103. A direct cooling inlet 102 and a liquid cooling inlet 104 are formed inside the other end of the cooling plate body 105, with the liquid cooling inlet 104 located at the bottom of the direct cooling inlet 102. The direct cooling outlet 101 and the direct cooling inlet 102... 2. A direct cooling channel 1001 is formed, allowing high-temperature compressed gaseous refrigerant to flow inside the direct cooling outlet 101 and the direct cooling inlet 102. The liquid cooling outlet 103 and the liquid cooling inlet 104 form a liquid cooling channel 1002. Thus, a first switching valve connecting the direct cooling outlet 101 and the direct cooling inlet 102 of the direct cooling channel 1001 and a second switching valve connecting the liquid cooling outlet 103 and the liquid cooling inlet 104 of the liquid cooling channel 1002 are connected to the outside of the cold plate body 105.

[0048] The width of the direct cooling outlet 101 of the flow channel is greater than the width of the direct cooling inlet 102 of the flow channel, and the width of the direct cooling flow channel 1001 gradually decreases from the direct cooling outlet 101 to the direct cooling inlet 102. The width of the liquid cooling outlet 103 of the flow channel is less than the width of the liquid cooling inlet 104 of the flow channel, and the width of the liquid cooling flow channel 1002 gradually increases from the liquid cooling outlet 103 to the liquid cooling inlet 104. The two flow channels of the direct cooling flow channel 1001, the direct cooling outlet 101 and the direct cooling inlet 102, are connected to the first switching valve outside the cold plate body 105, and the two flow channels of the liquid cooling flow channel 1002, the liquid cooling outlet 103 and the liquid cooling inlet 104, are connected to the second switching valve outside the cold plate body 105, realizing the switching of the flow channel inlet and outlet for cooling and heating modes.

[0049] The liquid cooling channel 1002 includes an end plate 1003, a thermal pad 1004, an upper end plate 1005, and a battery 1006. The two ends of the bottom of the upper end plate 1005 are fixed with end plates 1003. The bottom of the two end plates 1003 is fixed with a thermal pad 1004. The bottom of the thermal pad 1004 is fixed with a battery 1006, so that power is provided by the battery 1006. The top of the thermal pad 1004 and located between the two end plates 1003 is fixed with a battery direct liquid dual cooling plate 11, through which the cooling liquid and gas flow is carried out.

[0050] The battery direct-cooling dual-cooling plate structure provided in this embodiment can simultaneously use refrigerant and coolant to cool the battery at high temperatures and heat it at low temperatures by effectively arranging irregular cooling pipes. This solves the problems of using the direct-cooling thermal management system in normal temperature environments and low-load conditions, and using the liquid-cooling thermal management system in high-temperature environments and high-load conditions, while also being economical.

[0051] The battery direct-liquid dual-cooling plate structure and its direct-liquid dual-cooling thermal management system provided by this invention are used as follows:

[0052] (1) In low-temperature environments, batteries have a heating requirement;

[0053] For the battery direct liquid dual cooling plate 11, at this time, adjust the first conversion valve on the outside of the battery direct liquid dual cooling plate 11, the direct cooling inlet 102 becomes the direct cooling inlet, and the direct cooling outlet 101 becomes the direct cooling outlet; the high-temperature compressed gaseous refrigerant will become liquid as the temperature decreases, control the inlet of the direct cooling flow channel 1001 to be small and the outlet to be large, under the same pipeline pressure, the inlet flow rate is greater than the outlet flow rate, ensuring the direct cooling heat exchange process;

[0054] Adjust the external second switching valve of the battery direct liquid dual cooling plate 11, the liquid cooling inlet 104 is the liquid cooling inlet, and the liquid cooling outlet 103 is the liquid cooling outlet; the temperature of the high temperature coolant will decrease as heat exchange occurs, control the liquid cooling flow channel 1002 to have a large inlet and a small outlet, and under the same pipeline pressure, the inlet flow rate is less than the outlet flow rate to ensure the liquid cooling heat exchange process.

[0055] For the direct liquid dual cooling and heating management system, if the temperature of the motor circuit 400 is not high, the first port and the fourth port of the first four-way valve 3 of the passenger cabin air conditioning circuit 200 are connected, the second port and the third port are connected, the second port and the third port of the second four-way valve 4 are connected, and the first port and the third port of the third four-way valve 7 are connected.

[0056] The refrigerant is compressed into a high-temperature, high-pressure gas from the storage tank 2 by the compressor 1. It then flows directly to the battery direct-liquid dual-cooling plate 11 through the first four-way valve 3 to heat the battery. After heat exchange, it passes through the second expansion valve 10, the third four-way valve 7, the condenser 5, the second four-way valve 4, and the first four-way valve 3, finally returning to the storage tank 2. At this time, the first and second ports of the fourth four-way valve 16 and the first and third ports of the first three-way valve 13 in the battery liquid cooling circuit 300 are connected. The coolant flows directly from the water pump 12, passes through the fourth four-way valve 16, flows to the PTC heater 15 to heat the coolant, flows through the first three-way valve 13, and finally flows to the battery direct-liquid dual-cooling plate 11 to heat the battery.

[0057] If the motor circuit 400 has a certain temperature, the first port and fourth port of the first four-way valve 3 in the passenger compartment air conditioning circuit 200 are connected, the second port and third port are connected, the second port and fourth port of the second four-way valve 4 are connected, and the third port and fourth port of the third four-way valve 7 are connected. The refrigerant is compressed from the liquid storage tank 2 into a high-temperature, high-pressure gas by the compressor 1, passes through the first four-way valve 3, and flows directly to the battery direct-liquid dual-cooling plate 11 to heat the battery. After heat exchange, it passes through the second expansion valve 10 and the third four-way valve 7. The low-temperature liquid refrigerant flows through the heat exchanger 6 to absorb the high-temperature cooling water on the motor side, and then passes through the second four-way valve 4 and the first four-way valve 3. Finally, returning to the storage tank 2; in the battery liquid cooling circuit 300, the first port and the third port of the fourth four-way valve 16 are connected, the second port and the fourth port are connected, and the first port and the third port of the first three-way valve 13 are connected. At the same time, if the coolant temperature can meet the battery heating requirements, the PTC heater is not started; if the coolant temperature cannot meet the battery heating requirements, the PTC heater is started. The coolant flows directly from the water pump 12, through the fourth four-way valve 16, through the entire motor circuit 400, to the battery liquid cooling circuit 300, through the PTC heater 15, the first three-way valve 13, and finally to the battery direct liquid dual cooling plate 11 to heat the battery.

[0058] The direct cooling system and liquid cooling system work together to heat the battery, while making reasonable use of the waste heat of the motor circuit and PTC auxiliary heating, solving the economic efficiency of the direct cooling thermal management system when used in normal temperature environment and low load conditions, and ensuring battery temperature uniformity.

[0059] (2) In high-temperature environments, batteries require cooling.

[0060] For the battery direct liquid dual cooling plate 11, at this time, adjust the first conversion valve on the outside of the battery direct liquid dual cooling plate 11, the direct cooling outlet 101 becomes the direct cooling inlet, and the direct cooling inlet 102 becomes the direct cooling outlet; the low temperature and low pressure refrigerant will absorb the heat of the battery and the temperature will rise and turn into gaseous state. Control the inlet of the direct cooling flow channel 1001 to be large and the outlet to be small. Under the same pipeline pressure, the inlet flow rate is less than the outlet flow rate to ensure the direct cooling heat exchange process.

[0061] Adjust the external second switching valve of the battery direct liquid dual cooling plate 11, the liquid cooling outlet 103 is the liquid cooling inlet, and the liquid cooling inlet 104 is the liquid cooling outlet; the temperature of the low temperature coolant will rise as heat exchange occurs, control the liquid cooling flow channel 1002 to have a small inlet and a large outlet, and under the same pipeline pressure, the inlet flow rate is greater than the outlet flow rate to ensure the liquid cooling heat exchange process.

[0062] For the direct-liquid dual-cooling thermal management system, in the crew cabin air conditioning circuit 200, the first and third ports of the second four-way valve 4 are connected, and the first and third ports of the third four-way valve 7 are connected. The refrigerant is compressed from the liquid storage tank 2 by the compressor 1, passes through the second four-way valve 4, exchanges heat with the condenser, and then flows through the third four-way valve 7 and the second expansion valve 10 to the battery direct-liquid dual-cooling plate 11 to cool the battery. In the battery liquid cooling circuit 300, the first and second ports of the fourth four-way valve 16 are connected, and the first and second ports of the first three-way valve 13 are connected. The coolant flows directly from the water pump 12, passes through the fourth four-way valve 16, flows to the first radiator 14 to dissipate heat from the coolant, flows through the first three-way valve 13, and finally flows to the battery direct-liquid dual-cooling plate 11 to cool the battery.

[0063] The direct cooling system and the liquid cooling system work together to cool the battery, solving the economic problem of using a single battery liquid cooling system in high-temperature environments and high-load conditions; reducing the maximum battery temperature and ensuring battery temperature uniformity.

[0064] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A battery direct-liquid dual-cooling-plate structure, characterized in that, The battery direct-liquid dual cooling plate (11) includes a cooling plate body (105). A direct cooling outlet (101) and a liquid cooling outlet (103) are provided inside one end of the cooling plate body (105), and the direct cooling outlet (101) is located at the top of the liquid cooling outlet (103). A direct cooling inlet (102) and a liquid cooling inlet (104) are provided inside the other end of the cooling plate body (105), and the liquid cooling inlet (104) is located at the bottom of the direct cooling inlet (102). The direct cooling outlet (101) and the direct cooling inlet (102) form a direct cooling channel (1001), and the liquid cooling outlet (103) and the liquid cooling inlet (104) form a liquid cooling channel (1002). The width of the direct cooling outlet (101) is greater than the width of the direct cooling inlet (102), and the width of the direct cooling channel (1001) gradually decreases from the direct cooling outlet (101) to the direct cooling inlet (102); The width of the liquid cooling outlet (103) is smaller than the width of the liquid cooling inlet (104), and the width of the liquid cooling channel (1002) gradually increases from the liquid cooling outlet (103) to the liquid cooling inlet (104); In cooling mode: The direct cooling outlet (101) is the direct cooling inlet, and the direct cooling inlet (102) is the direct cooling outlet; The liquid cooling outlet (103) is the liquid cooling inlet, and the liquid cooling inlet (104) is the liquid cooling outlet; In heating mode: The direct cooling inlet (102) is the direct cooling inlet, and the direct cooling outlet (101) is the direct cooling outlet; The liquid cooling inlet (104) is the liquid cooling inlet, and the liquid cooling outlet (103) is the liquid cooling outlet.

2. The battery direct-liquid dual-cooling plate structure according to claim 1, characterized in that, The liquid cooling channel (1002) includes an end plate (1003), a thermal pad (1004), an upper end plate (1005), and a battery (1006). The upper end plate (1005) has end plates (1003) fixed at both ends of its bottom. The thermal pad (1004) is fixed at the bottom of the two end plates (1003). The battery (1006) is fixed at the bottom of the thermal pad (1004).

3. A direct-liquid dual-cooling thermal management system, used to implement the battery direct-liquid dual-cooling plate structure as described in any one of claims 1-2, characterized in that, It includes a passenger compartment air conditioning circuit (200), a battery liquid cooling circuit (300) and a motor circuit (400), wherein the passenger compartment air conditioning circuit (200) is located at one end of the battery liquid cooling circuit (300) and the motor circuit (400) is located at the top of the battery liquid cooling circuit (300); The passenger cabin air conditioning circuit (200) includes a compressor (1), a liquid storage tank (2), a first expansion valve (8), an evaporator (9), a second expansion valve (10), and a battery direct liquid dual cooling plate (11). The bottom of the compressor (1) is connected to the liquid storage tank (2). The bottom of the liquid storage tank (2) is connected to the evaporator (9) and the battery direct liquid dual cooling plate (11). The battery direct liquid dual cooling plate (11) is located at one end of the evaporator (9). The top of the evaporator (9) is connected to the first expansion valve (8). The top of the first expansion valve (8) is connected to the third four-way valve (7). The top of the battery direct liquid dual cooling plate (11) is connected to the second expansion valve (10). The second expansion valve (10) is connected to the third four-way valve (7).

4. The direct-liquid dual-cooling and heating management system according to claim 3, characterized in that, The passenger cabin air conditioning circuit (200) includes a first four-way valve (3), a second four-way valve (4), a condenser (5), a heat exchanger (6), and a third four-way valve (7). The top of the compressor (1) is connected to the second four-way valve (4), and the bottom of the second four-way valve (4) is connected to the first four-way valve (3). The top of one end of the first four-way valve (3) is connected to the compressor (1), the bottom of one end of the first four-way valve (3) is connected to the liquid storage tank (2), and the bottom of the other end of the first four-way valve (3) is connected to the battery direct liquid double cooling plate (11). The top of the second four-way valve (4) is connected to the heat exchanger (6), and the heat exchanger (6) is connected to the third four-way valve (7). One end of the second four-way valve (4) is connected to the condenser (5), and the condenser (5) is connected to the third four-way valve (7).

5. A direct-liquid dual-cooling and heating management system according to claim 4, characterized in that, The battery liquid cooling circuit (300) includes a battery water pump (12), a first three-way valve (13), a first radiator (14), a PTC heater (15), and a fourth four-way valve (16). The top of one end of the battery direct liquid double cooling plate (11) is connected to the battery water pump (12), the top of the battery water pump (12) is connected to the fourth four-way valve (16), the bottom of one end of the battery direct liquid double cooling plate (11) is connected to the first three-way valve (13), the bottom of the first three-way valve (13) is connected to the first radiator (14), and the first radiator (14) is connected to the fourth four-way valve (16). One end of the first three-way valve (13) is connected to the PTC heater (15), and the PTC heater (15) is connected to the first radiator (14).

6. A direct-liquid dual-cooling and heating management system according to claim 5, characterized in that, The motor circuit (400) includes a second three-way valve (18), a motor water pump (19), a DC-DC heat exchanger (20), an MCU heat exchanger (21), a drive motor heat exchanger (22), and a second radiator (23). The top of the second radiator (23) is connected to the second three-way valve (18), and the bottom of the second radiator (23) is connected to a heat exchanger (6). The top of one end of the heat exchanger (6) is connected to a fourth four-way valve (16). One end is connected to the second three-way valve (18), and a drive motor heat exchanger (22) is connected between the second radiator (23) and the heat exchanger (6). A motor water pump (19) is connected to the bottom of the second three-way valve (18), and a DC-DC heat exchanger (20) is connected to the bottom of the motor water pump (19). An MCU heat exchanger (21) is connected to the bottom of the DC-DC heat exchanger (20), and the bottom of the MCU heat exchanger (21) is connected to the drive motor heat exchanger (22).

7. A direct-liquid dual-cooling and heating management system according to claim 6, characterized in that, A compensating water tank (17) is connected between the fourth four-way valve (16) and the second three-way valve (18).

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