An on-board battery pack charging temperature management system

Abstract

This invention discloses an on-board battery pack charging temperature management system, comprising: an on-board temperature control device and a charging device; the charging device includes a charging station temperature control module; the on-board temperature control device includes an expansion tank, a battery pack heat exchanger, and a first cooling pipe, with the inlet and outlet of the expansion tank connected to the two ends of the first cooling pipe respectively; the battery pack heat exchanger is disposed in the first cooling pipe; the on-board battery pack is disposed in the first cooling pipe between the battery pack heat exchanger and the inlet of the expansion tank; the charging station temperature control module includes a storage tank, a first evaporator, a first compressor, a second heat exchanger, a second cooling pipe, at least one third cooling pipe, at least one fourth cooling pipe, at least one first outlet, and at least one first inlet. This system ensures that the battery pack temperature is within a suitable temperature range during vehicle charging, which is beneficial for improving charging efficiency, battery safety performance, and lifespan.

Description

Technical Field

[0001] This invention relates to the field of vehicle control technology, and in particular to an on-board battery pack charging temperature management system. Background Technology

[0002] If the battery pack in a new energy electric vehicle is hot, it will generate a lot of heat during charging, potentially causing the vehicle to spontaneously combust. Conversely, if the battery pack is cold, it may not fully charge or may take a long time to charge.

[0003] In existing technologies, it is difficult to manage the temperature of the battery when charging electric vehicles, which can easily lead to energy consumption of the vehicle itself, reduce charging efficiency, and result in a longer charging time. Summary of the Invention

[0004] This invention provides an on-board battery pack charging temperature management system, which manages the battery temperature of electric vehicles during charging, thereby improving the temperature exchange efficiency, charging efficiency, and service life of the battery pack.

[0005] This invention provides an on-board battery pack charging temperature management system, comprising: an on-board temperature control device and a charging device; the charging device includes a charging station temperature control module;

[0006] The vehicle-mounted temperature control device includes an expansion tank, a battery heat exchanger, and a first cooling pipe. The inlet and outlet of the expansion tank are respectively connected to the two ends of the first cooling pipe. The battery heat exchanger is disposed in the first cooling pipe. The vehicle-mounted battery pack is disposed in the first cooling pipe between the battery heat exchanger and the inlet of the expansion tank.

[0007] The charging station temperature control module includes a liquid storage tank, a first evaporator, a first compressor, a second heat exchanger, a second cooling pipe, at least one third cooling pipe, at least one fourth cooling pipe, at least one first liquid outlet, and at least one first liquid inlet. The liquid outlet of the liquid storage tank is connected to the liquid inlet of the first evaporator through the second cooling pipe. The liquid outlet of the first evaporator is connected to the liquid inlet of the first compressor through the second cooling pipe. The liquid outlet of the first compressor is connected to the liquid inlet of the second heat exchanger through the second cooling pipe. The liquid outlet of the second heat exchanger is connected to the liquid inlet of the liquid storage tank through the second cooling pipe. The first liquid outlet is connected to the second cooling pipe between the liquid outlet of the liquid storage tank and the liquid inlet of the first evaporator through the third cooling pipe. The first liquid inlet is connected to the second cooling pipe between the liquid outlet of the first evaporator and the liquid inlet of the first compressor through the fourth cooling pipe.

[0008] The battery heat exchanger includes a second liquid inlet and a second liquid outlet; when the vehicle battery pack is charged using the charging device, the first liquid outlet is connected to the second liquid inlet, and the first liquid inlet is connected to the second liquid outlet.

[0009] Optionally, the vehicle temperature control device further includes a first electronic expansion valve;

[0010] The first electronic expansion valve is located at the second liquid inlet, or the first electronic expansion valve is located at the second liquid outlet.

[0011] Optionally, the vehicle-mounted temperature control device further includes an outdoor heat exchanger, an indoor heat exchanger, a second compressor, and a fifth cooling pipeline;

[0012] The outlet of the second compressor is connected to the inlet of the outdoor heat exchanger through the fifth cooling pipe; the outlet of the outdoor heat exchanger is connected to the inlet of the indoor heat exchanger through the fifth cooling pipe; and the outlet of the indoor heat exchanger is connected to the inlet of the second compressor through the fifth cooling pipe.

[0013] The battery heat exchanger also includes a third liquid inlet and a third liquid outlet; the fifth cooling pipe between the liquid outlet of the outdoor heat exchanger and the liquid inlet of the indoor heat exchanger is connected to the third liquid inlet, and the fifth cooling pipe between the liquid outlet of the indoor heat exchanger and the liquid inlet of the second compressor is connected to the third liquid outlet.

[0014] Optionally, the on-board temperature control device further includes a second electronic expansion valve;

[0015] The second electronic expansion valve is located at the third liquid inlet.

[0016] Optionally, the vehicle temperature control device further includes a heating module;

[0017] The heating module is disposed in the first cooling pipe; the heating module is used to heat the coolant in the first cooling pipe.

[0018] Optionally, the on-board temperature control device further includes a liquid pump;

[0019] The liquid pump is installed in the first cooling pipe; the liquid pump is used to increase the flow rate of the coolant in the first cooling pipe during operation.

[0020] Optionally, the charging station cooling device further includes a recycling machine and a first solenoid valve;

[0021] The liquid inlet pipe of the recovery machine is connected to each of the third cooling pipes or each of the fourth cooling pipes, and the first solenoid valve is installed in the liquid inlet pipe of the recovery machine.

[0022] Optionally, the charging station cooling device further includes a vacuum pump and a second solenoid valve;

[0023] The inlet pipe of the vacuum pump is connected to each of the third or fourth cooling pipes, and the second solenoid valve is installed in the inlet pipe of the vacuum pump.

[0024] Optionally, the charging device further includes: a charging station signal detection module;

[0025] The charging station signal detection module is used to receive the charging signal and the temperature signal of the vehicle battery pack, and control the working state of the charging station temperature control module according to the charging signal and the temperature signal.

[0026] Optionally, the charging station temperature control module further includes a third solenoid valve and a fourth solenoid valve;

[0027] The third solenoid valve is disposed in the third cooling pipe; the fourth solenoid valve is disposed in the fourth cooling pipe;

[0028] The charging station signal detection module is also used to control the opening or closing of the third solenoid valve and the fourth solenoid valve based on the temperature signal of the vehicle battery pack.

[0029] The technical solution provided by this invention, by setting a charging station temperature control module in the charging device, allows the refrigerant in the charging station temperature control module to self-circulate in the second cooling pipe when the vehicle battery pack is not being charged by the charging device. When the vehicle battery pack is being charged by the charging device, the first liquid outlet is connected to the second liquid inlet, and the first liquid inlet is connected to the second liquid outlet. This allows the refrigerant in the second cooling pipe to directly exchange heat and control the temperature of the coolant in the first cooling pipe in the battery combination heat exchanger, improving the temperature exchange efficiency of the vehicle battery pack. This enables the vehicle battery pack to be cooled or heated while charging, ensuring that the battery pack temperature is within a suitable range during charging, which is beneficial for improving charging efficiency, battery safety performance, and service life.

[0030] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of an on-board battery pack charging temperature management system provided in an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the structure of a charging station temperature control module provided in an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of another vehicle battery pack charging temperature management system provided in an embodiment of the present invention.

[0035] The reference numerals in the attached figures are explained as follows:

[0036] 1. Indoor heat exchanger; 2. Second compressor; 3. Outdoor heat exchanger; 4. Fan; 5. Third electronic expansion valve; 6. Second electronic expansion valve; 7. Battery combination heat exchanger; 7(1) First lamination section; 7(2) Second lamination section; 8. Liquid pump; 9. Heating module; 10. Expansion tank; 11. Vehicle battery pack; 12. Vehicle charging interface; 13. Charging station charging interface; 14. Charging station signal detection module; 15. Charging device; 16. First electronic expansion valve; 17(1) Second liquid outlet; 17(2) Second liquid inlet; 18(1) First liquid inlet; 18(2) First liquid outlet; 19. Charging station temperature control module; 20. Thirteenth solenoid valve; 2 1. Twelfth solenoid valve; 22. Eleventh solenoid valve; 23. Second solenoid valve; 24. Vacuum pump; 25. First solenoid valve; 26. Recovery machine; 27. Fifth solenoid valve; 28. Eighth solenoid valve; 29. ​​Sixth solenoid valve; 30. Ninth solenoid valve; 31. Seventh solenoid valve; 32. Tenth solenoid valve; 33. Fourth solenoid valve; 34. Third solenoid valve; 35. First evaporator; 36. Fourth electronic expansion valve; 37. First compressor; 38. Oil separator; 39. Check valve; 40. Second heat exchanger; 41. Liquid receiver; L1. First cooling line; L2. Second cooling line; L3. Third cooling line; L4. Fourth cooling line; L5. Fifth cooling line. Detailed Implementation

[0037] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0038] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0039] This invention provides an on-board battery pack charging temperature management system. Figure 1 This is a schematic diagram of the structure of an on-board battery pack charging temperature management system provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the vehicle battery pack charging temperature management system includes: a vehicle temperature control device 100 and a charging device 15; the charging device 15 includes a charging station temperature control module 19. The vehicle temperature control device 100 is used to control the temperature of the vehicle battery pack 11, the charging device 15 is used to charge electrical equipment, and the charging station temperature control module 19 is used to control the temperature of devices connected to the module.

[0040] Continue to refer to Figure 1 The vehicle-mounted temperature control device 100 includes an expansion tank 10, a battery heat exchanger 7, and a first cooling pipe L1. The inlet and outlet of the expansion tank 10 are connected to the two ends of the first cooling pipe L1, respectively. The battery heat exchanger 7 is disposed in the first cooling pipe L1. The vehicle-mounted battery pack 11 is disposed in the first cooling pipe L1 between the battery heat exchanger 7 and the inlet of the expansion tank 10. The battery heat exchanger 7 includes a second inlet 17 (2) and a second outlet 17 (1). When the vehicle-mounted battery pack 11 is charged by the charging device 15, the first outlet 18 (2) is connected to the second inlet 17 (2), and the first inlet 18 (1) is connected to the second outlet 17 (1).

[0041] The expansion tank 10 is used to store and provide excess coolant required by the vehicle temperature control device 100, and can add and compensate coolant to the first cooling pipe L1. The internal structure of the battery heat exchanger 7 can be a stacked type. For example, the battery heat exchanger 7 includes at least a first stacked section 7(1), which includes multiple layers of stacked plates arranged in layers, and may also include a second stacked section 7(2), which also includes multiple layers of stacked plates arranged in layers. The vehicle battery pack 11 includes a vehicle charging interface 12, which is used to charge the vehicle battery pack 11 when connected to an external charging device.

[0042] Specifically, the coolant in the expansion tank 10 flows into the battery pack heat exchanger 7 through the outlet of the expansion tank 10. After temperature exchange in the battery pack heat exchanger 7, it flows along the first cooling pipe L1 through the vehicle battery pack 11 to perform heat exchange and temperature control on the vehicle battery pack 11.

[0043] Figure 2 This is a structural schematic diagram of a charging station temperature control module provided in an embodiment of the present invention, as shown below. Figure 2As shown, the charging station temperature control module 19 includes a liquid storage tank 41, a first evaporator 35, a first compressor 37, a second heat exchanger 40, a second cooling pipe L2, at least one third cooling pipe L3, at least one fourth cooling pipe L4, at least one first liquid outlet 18(2), and at least one first liquid inlet 18(1). The liquid outlet of the liquid storage tank 41 is connected to the liquid inlet of the first evaporator 35 through the second cooling pipe L2, and the liquid outlet of the first evaporator 35 is connected to the liquid inlet of the first compressor 37 through the second cooling pipe L2. The outlet of compressor 37 is connected to the inlet of second heat exchanger 40 through second cooling pipe L2, and the outlet of second heat exchanger 40 is connected to the inlet of liquid storage tank 41 through second cooling pipe L2; the first outlet 18(2) is connected to the second cooling pipe L2 between the outlet of liquid storage tank 41 and the inlet of first evaporator 35 through third cooling pipe L3; the first inlet 18(1) is connected to the second cooling pipe L2 between the outlet of first evaporator 35 and the inlet of first compressor 37 through fourth cooling pipe L4.

[0044] The liquid storage tank 41 stores and supplies the refrigerant required by the charging station temperature control module 19, and can add and replenish refrigerant to the second cooling pipe L2 or the third cooling pipe L3. The first evaporator 35 can exchange heat between the low-temperature refrigerant and the outside air, vaporizing and absorbing heat to achieve a cooling effect. The first compressor 37 can convert the low-temperature, low-pressure gas into high-temperature, high-pressure refrigerant gas, providing power for the refrigerant circulation in the second cooling pipe L2. The second heat exchanger 40 can absorb the heat of the incoming gas, thereby converting the gas into a liquid.

[0045] It is understandable that the number of the third cooling pipe L3, the fourth cooling pipe L4, the first liquid outlet 18(2) and the first liquid inlet 18(1) can all be one or multiple. When there are multiple, the number of the third cooling pipe L3, the fourth cooling pipe L4, the first liquid outlet 18(2) and the first liquid inlet 18(1) can be equal.

[0046] Specifically, when the vehicle battery pack 11 is not charged by the charging device 15, the first evaporator 35 converts the low-temperature refrigerant into a low-temperature, low-pressure refrigerant gas. The low-temperature, low-pressure refrigerant gas then enters the first compressor 37. The first compressor 37 compresses the low-temperature, low-pressure refrigerant gas and converts it into a high-temperature, high-pressure refrigerant gas. The high-temperature, high-pressure refrigerant gas enters the second heat exchanger 40 to dissipate heat and condense into liquid refrigerant. The liquid refrigerant continues to flow along the second cooling pipe L2 into the liquid storage tank 41. The refrigerant in the liquid storage tank 41 continues to flow along the second cooling pipe L2 into the first evaporator 35, continuing the above process to achieve self-circulation of the refrigerant in the second cooling pipe L2.

[0047] When the vehicle battery pack 11 is charged by the charging device 15, the first liquid outlet 18(2) is connected to the second liquid inlet 17(2), and the first liquid inlet 18(1) is connected to the second liquid outlet 17(1). At this time, the refrigerant in the storage tank 41 of the second cooling pipe L2 enters the second liquid inlet 17(2) through the third cooling pipe L3 and the first liquid outlet 18(2), flows through the battery combination heat exchanger 7, and then flows through the second liquid outlet 17(1), the first liquid inlet 18(1), and the fourth cooling pipe L4 into the first compressor 37 in the second cooling pipe L2. Then, it forms a refrigerant circulation pipeline through the second heat exchanger 40 and the storage tank 41. Since the coolant flowing through the vehicle battery pack 11 in the vehicle temperature control device 100 circulates in the first cooling pipe L1, the refrigerant is connected to the second liquid outlet 18(2). The refrigerant in the second cooling pipe L2 flows through each layer of the first stacked section 7 (1) in the battery heat exchanger 7 and exchanges heat with the coolant from the vehicle battery pack 11. This achieves heat exchange and temperature control of the coolant flowing through the battery heat exchanger 7 in the first cooling pipe L1. When the temperature of the vehicle battery pack 11 is high and needs to be cooled, the refrigerant flowing through the battery heat exchanger 7 in the second cooling pipe L2 is at a low temperature. This can cool the coolant flowing through the battery heat exchanger 7 in the first cooling pipe L1. The cooled coolant then flows through the vehicle battery pack 11 along the first cooling pipe L1, thereby reducing the temperature of the vehicle battery pack 11. Conversely, when the temperature of the vehicle battery pack 11 is low and needs to be raised, the refrigerant flowing through the battery combination heat exchanger 7 in the second cooling pipe L2 is at a high temperature. The working principle of raising the temperature of the vehicle battery pack 11 can be referred to the above description, and will not be repeated here.

[0048] The technical solution provided by this invention, by setting a charging station temperature control module in the charging device, allows the refrigerant in the charging station temperature control module to self-circulate in the second cooling pipe when the vehicle battery pack is not being charged by the charging device. When the vehicle battery pack is being charged by the charging device, the first liquid outlet is connected to the second liquid inlet, and the first liquid inlet is connected to the second liquid outlet. This allows the refrigerant in the second cooling pipe to directly exchange heat and control the temperature of the coolant in the first cooling pipe in the battery combination heat exchanger, improving the temperature exchange efficiency of the vehicle battery pack. This allows the vehicle battery pack to be cooled or heated while charging, ensuring that the battery pack temperature is within a suitable range during charging, which is beneficial for improving charging efficiency, battery safety performance, and service life.

[0049] Optional, see reference Figure 1The vehicle temperature control device 100 also includes a first electronic expansion valve 16; the first electronic expansion valve 16 is located at the second liquid inlet 17(2). Thus, when the vehicle battery pack 11 is charged by the charging device 15 and the charging station temperature control module 19 is required to adjust the temperature of the vehicle battery pack 11, the first electronic expansion valve 16 can control the flow rate of refrigerant flowing into the battery combination heat exchanger 7 from the second cooling pipe L2, thereby improving the heat exchange efficiency of the coolant in the first cooling pipe L1 of the battery combination heat exchanger 7.

[0050] It is understood that the above description is only exemplified by the first electronic expansion valve 16 being set at the second liquid inlet 17(2). The first electronic expansion valve 16 can also be set at the second liquid outlet 17(1), and its working principle is similar to that described above. Please refer to the above description, and it will not be repeated here.

[0051] In an alternative embodiment, Figure 3 This is a schematic diagram of another vehicle-mounted battery pack charging temperature management system provided in an embodiment of the present invention, as shown below. Figure 3 As shown, the vehicle-mounted temperature control device 100 also includes an outdoor heat exchanger 3, an indoor heat exchanger 1, a second compressor 2, and a fifth cooling pipe L5. The outlet of the second compressor 2 is connected to the inlet of the outdoor heat exchanger 3 through the fifth cooling pipe L5, the outlet of the outdoor heat exchanger 3 is connected to the inlet of the indoor heat exchanger 1 through the fifth cooling pipe L5, and the outlet of the indoor heat exchanger 1 is connected to the inlet of the second compressor 2 through the fifth cooling pipe L5. The battery combination heat exchanger 7 also includes a third inlet in3 and a third outlet out3. The fifth cooling pipe L5 between the outlet of the outdoor heat exchanger 3 and the inlet of the indoor heat exchanger 1 is connected to the third inlet in3, and the fifth cooling pipe L5 between the outlet of the indoor heat exchanger 1 and the inlet of the second compressor 2 is connected to the third outlet out3.

[0052] Specifically, during summer driving, the vehicle battery pack 11 is cooled by the vehicle temperature control device 100. At this time, the second compressor 2 compresses the refrigerant flowing into the indoor heat exchanger 1 and the battery combination heat exchanger 7, and outputs high-temperature and high-pressure refrigerant gas to the outdoor heat exchanger 3. The high-temperature and high-pressure gas dissipates heat and condenses into liquid refrigerant in the outdoor heat exchanger 3. A portion of the liquid refrigerant flows along the fifth cooling pipe L5 through the third electronic expansion valve 5 and cools the interior space of the vehicle in the indoor heat exchanger 1. Another portion of the liquid refrigerant flows through the second electronic expansion valve 6 and enters the second finned section 7(2) in the battery combination heat exchanger 7 to cool the coolant flowing through the first cooling pipe L1. Then the refrigerant in the indoor heat exchanger 1 and the battery combination heat exchanger 7 merges again into the second compressor 2. The coolant in the first cooling pipe L1 absorbs heat from the vehicle battery pack 11 and its temperature rises. It then enters the battery heat exchanger 7 through the expansion tank 10 and exchanges heat with the liquid refrigerant in the battery heat exchanger 7. After the temperature of the coolant in the first cooling pipe L1 of the battery heat exchanger 7 decreases, it passes through the vehicle battery pack 11 again and absorbs heat from the vehicle battery pack 11 to cool the vehicle battery pack 11.

[0053] Optionally, the vehicle temperature control device 100 may also include a fan 4 and a third electronic expansion valve 5. The fan 4 can be installed inside or outside the outdoor heat exchanger 3 to introduce fresh air into the outdoor heat exchanger 3, facilitating heat exchange between the outdoor heat exchanger 3 and the outside environment. The third electronic expansion valve 5 is installed at the liquid inlet of the indoor heat exchanger 1. When the vehicle temperature control device 100 adjusts the interior temperature, the third electronic expansion valve 5 can control the refrigerant flow rate from the fifth cooling pipe L5 into the indoor heat exchanger 1, improving the efficiency of indoor temperature regulation.

[0054] Optional, see reference Figure 3 The vehicle temperature control device 100 also includes a second electronic expansion valve 6, which is located at the third liquid inlet in3. Thus, when the vehicle battery pack 11 requires the vehicle temperature control device 100 to regulate its temperature, the second electronic expansion valve 6 can control the refrigerant flow rate from the fifth cooling pipe L5 into the battery pack heat exchanger 7, thereby improving the heat exchange efficiency of the coolant in the first cooling pipe L1 of the battery pack heat exchanger 7.

[0055] Optional, continue to refer to Figure 1 The vehicle temperature control device 100 also includes a heating module 101; the heating module 101 is disposed in the first cooling pipe L1; the heating module 101 is used to heat the coolant in the first cooling pipe L1.

[0056] The heating module 101 includes a heater 9, which heats the coolant when the coolant in the first cooling pipe L1 flows into the heater 9.

[0057] Specifically, when the temperature of the vehicle battery pack 11 is low and heating is required during winter driving, the heater 9 is activated. The coolant flowing through the vehicle battery pack 11 is heated in the heater 9 after passing through the expansion tank 10, and then flows through the battery pack heat exchanger 7 again to heat the vehicle battery pack 11.

[0058] Optional, continue to refer to Figure 1 The vehicle temperature control device 100 also includes a liquid pump 8; the liquid pump 8 is disposed in the first cooling pipe L1; the liquid pump 8 is used to increase the flow rate of the coolant in the first cooling pipe L1 during operation. Thus, when regulating the temperature of the vehicle battery pack 11, by increasing the flow rate of the coolant in the first cooling pipe L1, the flow rate of the coolant flowing through the vehicle battery pack 11 is increased, thereby improving the heat exchange efficiency of the vehicle battery pack 11.

[0059] Optional, continue to refer to Figure 2 The charging station temperature control module 19 may also include an oil separator 38, a check valve 39, and a fourth electronic expansion valve 36. The oil separator 38, located between the first compressor 37 and the second heat exchanger 40, separates the lubricating oil from the high-pressure vapor discharged from the first compressor 37 under gravity, based on the principle of reducing airflow velocity and changing airflow direction, ensuring the safe and efficient operation of the charging station temperature control module 19. The check valve 39, located in the second cooling pipe L2 between the oil separator 38 and the second heat exchanger 40, prevents the high-temperature, high-pressure refrigerant entering the second heat exchanger 40 from returning to the first compressor 37, improving cooling efficiency. The fourth electronic expansion valve 36, located in the second cooling pipe L2 between the liquid receiver 41 and the first evaporator 35, controls the refrigerant flow from the liquid receiver 41 into the first evaporator 35, further improving cooling efficiency.

[0060] Optional, see reference Figure 2 The charging station cooling device 19 also includes a recycling machine 26 and a first solenoid valve 25; the liquid inlet pipe of the recycling machine 26 is connected to each of the third cooling pipes L3 or each of the fourth cooling pipes L4, and the first solenoid valve 25 is installed in the liquid inlet pipe of the recycling machine 26.

[0061] The recycling unit 26 is used to recycle the refrigerant in the third cooling pipe L3 and the fourth cooling pipe L4, so as to prevent the refrigerant remaining in the third cooling pipe L3 and the fourth cooling pipe L4 from affecting the temperature of the refrigerant flowing into the battery combination heat exchanger 7 when the charging station cooling device 19 inputs the refrigerant in the second cooling pipe L2 into the battery combination heat exchanger 7 next time, thereby reducing the heat exchange efficiency.

[0062] Specifically, when the vehicle battery pack 11 stops charging, but the first liquid outlet 18(2) is connected to the second liquid inlet 17(2), and the first liquid inlet 18(1) is still connected to the second liquid outlet 17(1), the passage between the third cooling pipe L3 and the second cooling pipe L2, and the passage between the fourth cooling pipe L4 and the second cooling pipe L2 are disconnected. The first solenoid valve 25 is opened, and the recycling machine 26 works to recover the refrigerant in the third cooling pipe L3 and the fourth cooling pipe L4 into the recycling machine 26 so that the refrigerant in the recycling machine 26 can be reused in the future to improve resource utilization.

[0063] It is understood that the above description only illustrates the connection between the liquid inlet pipe of the recovery machine 26 and each of the fourth cooling pipes L4. The liquid inlet pipe of the recovery machine 26 can also be connected to each of the third cooling pipes L3. Its working principle is similar to that described above, and will not be repeated here.

[0064] Optional, see reference Figure 2 The charging station cooling device 19 also includes a vacuum pump 24 and a second solenoid valve 23; the liquid inlet pipe of the vacuum pump 24 is connected to each of the fourth cooling pipes L4, and the second solenoid valve 23 is installed in the liquid inlet pipe of the vacuum pump 24.

[0065] The vacuum pump 24 is used to perform a vacuuming operation on the third cooling pipe L3 and the fourth cooling pipe L4, so as to increase the flow rate of the refrigerant in the third cooling pipe L3, the battery combination heat exchanger 7 and the fourth cooling pipe L4 when the subsequent charging station cooling device 19 inputs the refrigerant in the second cooling pipe L2 into the battery combination heat exchanger 7, thereby improving the heat exchange efficiency.

[0066] Specifically, when the vehicle battery pack 11 is charged by the charging device 15, the first liquid outlet 18(2) is connected to the second liquid inlet 17(2), and the first liquid inlet 18(1) is connected to the second liquid outlet 17(1). When the refrigerant in the second cooling pipe L2 does not enter the battery heat exchanger 7, the second solenoid valve 23 is opened, the vacuum pump 24 is operated, and the pipeline formed by the third cooling pipe L3, the battery heat exchanger 7 and the fourth cooling pipe L4 is evacuated to improve the heat exchange efficiency when the vehicle charging pack 11 is subsequently regulated.

[0067] It is understood that the above description only illustrates the connection between the liquid inlet pipe of the vacuum pump 24 and each of the fourth cooling pipes L4. The liquid inlet pipe of the vacuum pump 24 can also be connected to each of the third cooling pipes L3. Its working principle is similar to that described above, and will not be repeated here.

[0068] It is understandable that, in order to achieve branch control of the refrigerant, the charging station temperature control module 19 is equipped with a number of solenoid valves. For example, an eleventh solenoid valve 22 is provided between the first liquid inlet 18 (11) and the first solenoid valve 25 or the second solenoid valve 23, a twelfth solenoid valve 21 is provided between the first liquid inlet 18 (21) and the first solenoid valve 25 or the second solenoid valve 23, and a thirteenth solenoid valve 20 is provided between the first liquid inlet 18 (n1) and the first solenoid valve 25 or the second solenoid valve 23.

[0069] In an alternative embodiment, reference continues. Figure 3 The charging device 15 also includes a charging station signal detection module 14; the charging station signal detection module 14 is used to receive the charging signal and the temperature signal of the vehicle battery pack 11, and control the working state of the charging station temperature control module 19 according to the charging signal and the temperature signal.

[0070] The charging signal may include the charging amount of the vehicle battery pack 11 and the first liquid inlet number and the first liquid outlet number of the vehicle temperature control device 100 connected to the charging station temperature control module 19.

[0071] Specifically, the charging station signal detection module 14 may include sensors and other devices to sense the first inlet and first outlet numbers of the vehicle connected to the charging station temperature control module 19. When the vehicle charging interface 12 of the vehicle battery pack 11 is electrically connected to the charging station charging interface 13 of the charging device 15, the charging amount and temperature signals of the vehicle battery pack 11 can be acquired through the charging interface 13 and transmitted to the charging station signal detection module 14. This allows the charging station signal detection module 14 to control the refrigerant temperature in the second cooling pipe L2 of the charging station temperature control module 19 based on the charging and temperature signals, thereby heating or cooling the vehicle battery pack 11.

[0072] Optional, continue to refer to Figure 2 The charging station temperature control module 19 also includes a third solenoid valve 34 and a fourth solenoid valve 33; the third solenoid valve 34 is disposed in the third cooling pipe L3; the fourth solenoid valve 33 is disposed in the fourth cooling pipe L4; the charging station signal detection module 14 is also used to control the opening or closing of the third solenoid valve 34 and the fourth solenoid valve 33 according to the temperature signal of the vehicle battery pack 11.

[0073] Specifically, when no vehicle is using the charging device 15 for charging, the charging station signal detection module 14 does not detect the temperature signal of the vehicle battery pack 11. At this time, it controls the third solenoid valve 34 and the fourth solenoid valve 33 to close, and the refrigerant in the charging station temperature control module 19 circulates in the second cooling pipe L2.

[0074] When the vehicle is charged using the charging device 15 in summer, the temperature of the on-board battery pack 11 is high when it is first parked due to the high summer temperature, and the temperature of the battery pack will also rise during the charging process. Therefore, after the first liquid outlet 18(2) is connected to the second liquid inlet 17(2) and the first liquid inlet 18(1) is connected to the second liquid outlet 17(1), the charging station signal detection module 14 controls the third solenoid valve 34 and the fourth solenoid valve 33 to be turned on according to the temperature signal of the on-board battery pack 11 received, so that the refrigerant in the second cooling pipe L2 can enter the battery combination heat exchanger 7 to exchange heat with the coolant in the first cooling pipe L1, so as to cool down the on-board battery pack 11.

[0075] Before a vehicle is parked for an extended period of time in winter, and the temperature of the on-board battery pack 11 is low and needs to be preheated, the first liquid outlet 18(2) of the on-board temperature control device 100 can be connected to the second liquid inlet 17(2), and the first liquid inlet 18(1) can be connected to the second liquid outlet 17(1). The charging station signal detection module 14 controls the third solenoid valve 34 and the fourth solenoid valve 33 to be turned on according to the temperature signal of the on-board battery pack 11 received, so that the high-temperature refrigerant in the second cooling pipe L2 can enter the battery combination heat exchanger 7 to exchange heat with the coolant in the first cooling pipe L1, thereby raising the temperature of the on-board battery pack 11.

[0076] Understandably, in order to achieve refrigerant branch control, the charging station temperature control module 19 is equipped with a number of solenoid valves. For example, a fifth solenoid valve 27 is provided between the first liquid inlet 18 (11) and the fourth solenoid valve 33, a sixth solenoid valve 29 is provided between the first liquid inlet 18 (21) and the fourth solenoid valve 33, a seventh solenoid valve 31 is provided between the first liquid inlet 18 (n1) and the fourth solenoid valve 33, and correspondingly, an eighth solenoid valve 28 is provided between the first liquid outlet 18 (12) and the third solenoid valve 34, a ninth solenoid valve 30 is provided between the first liquid outlet 18 (22) and the third solenoid valve 34, and a tenth solenoid valve 32 is provided between the first liquid outlet 18 (n2) and the third solenoid valve 34.

[0077] When no vehicle is charging using the charging device 15, the first solenoid valve 25, the second solenoid valve 23, the third solenoid valve 34, the fourth solenoid valve 33, the fifth solenoid valve 27, the sixth solenoid valve 29, the seventh solenoid valve 31, the eighth solenoid valve 28, the ninth solenoid valve 30, the tenth solenoid valve 32, the eleventh solenoid valve 22, the twelfth solenoid valve 21, and the thirteenth solenoid valve 20 are all in the closed state, and the refrigerant in the charging station temperature control module 19 circulates in the second cooling pipe L2.

[0078] When only one vehicle is being charged using the charging device 15, the charging station signal detection module 14 can detect the numbers of the first inlet 18(n1) and the first outlet 18(n2) connected to the second inlet 17(2) and the second outlet 17(1) of the vehicle. For example, the second inlet 17(2) of the vehicle is connected to the first outlet 18(22), and the second outlet 17(1) is connected to the first inlet 18(21). If the charging station signal detection module 14 determines that the temperature of the vehicle battery pack 11 needs to be adjusted by the charging station temperature control module 19 based on the temperature signal of the vehicle battery pack 11, it first controls the twelfth solenoid valve 21 and the second solenoid valve 23 to be turned on, and the vacuum pump 24 works to turn on the third cooling pipe L3 where the ninth solenoid valve 30 is located. The fourth cooling pipe L4, where the sixth solenoid valve 29 is located, and the cooling pipes in the battery heat exchanger 7 that are connected to the third cooling pipe L3 and the fourth cooling pipe L4 are evacuated. After the evacuation is completed, the vacuum pump 24 stops working, the twelfth solenoid valve 21 and the second solenoid valve 23 are closed, and the third solenoid valve 34, the fourth solenoid valve 33, the sixth solenoid valve 29 and the ninth solenoid valve 30 are turned on. The refrigerant in the second cooling pipe L2 in the charging station temperature control module 19 enters the battery heat exchanger 7 through the third cooling pipe L3 where the third solenoid valve 34 and the ninth solenoid valve 30 are located for heat exchange. The refrigerant entering the battery heat exchanger 7 then enters the second cooling pipe L2 through the fourth cooling pipe L4 where the sixth solenoid valve 29 is located and the fourth solenoid valve 33, thus completing one heat exchange process.

[0079] Furthermore, if the charging station signal detection module 14 detects that the vehicle battery pack 11 is fully charged or has completed charging, it controls the third solenoid valve 34, the fourth solenoid valve 33, the sixth solenoid valve 29 and the ninth solenoid valve 30 to close, and the twelfth solenoid valve 21 and the first solenoid valve 25 to open. The recycling machine 26 works to recover the refrigerant in the third cooling pipe L3 where the ninth solenoid valve 30 is located, the fourth cooling pipe L4 where the sixth solenoid valve 29 is located, and the cooling pipe in the battery combination heat exchanger 7 that is connected to the third cooling pipe L3 and the fourth cooling pipe L4. After the recovery is completed, the twelfth solenoid valve 21 and the first solenoid valve 25 close, the recycling machine 26 stops working, the second liquid inlet 17 (2) of the vehicle temperature control device 100 is disconnected from the first liquid outlet 18 (22), the second liquid outlet 17 (1) is disconnected from the first liquid inlet 18 (21), and the vehicle charging interface 12 is disconnected from the charging station charging interface 13, thus completing the entire charging process.

[0080] When multiple vehicles are charged simultaneously using the charging device 15, the charging station signal detection module 14 can detect the numbers of the first liquid inlet and the first liquid outlet connected to the multiple vehicles respectively, and then synchronously control the solenoid valves in the third cooling pipe L3 and the fourth cooling pipe L4 connected to the multiple vehicles to close or open. The working principle is similar to that of the case where only one vehicle is charged using the charging device 15, and can be referred to the above description, which will not be repeated here.

[0081] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0082] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A vehicle-mounted battery pack charging temperature management system, characterized in that, include: On-board temperature control device and charging device; the charging device includes a charging station temperature control module. The vehicle-mounted temperature control device includes an expansion tank, a battery heat exchanger, and a first cooling pipe. The inlet and outlet of the expansion tank are respectively connected to the two ends of the first cooling pipe. The battery heat exchanger is disposed in the first cooling pipe. The vehicle-mounted battery pack is disposed in the first cooling pipe between the battery heat exchanger and the inlet of the expansion tank. The charging station temperature control module includes a liquid storage tank, a first evaporator, a first compressor, a second heat exchanger, a second cooling pipe, at least one third cooling pipe, at least one fourth cooling pipe, at least one first liquid outlet, and at least one first liquid inlet. The liquid outlet of the liquid storage tank is connected to the liquid inlet of the first evaporator through the second cooling pipe. The liquid outlet of the first evaporator is connected to the liquid inlet of the first compressor through the second cooling pipe. The liquid outlet of the first compressor is connected to the liquid inlet of the second heat exchanger through the second cooling pipe. The liquid outlet of the second heat exchanger is connected to the liquid inlet of the liquid storage tank through the second cooling pipe. The first liquid outlet is connected to the second cooling pipe between the liquid outlet of the liquid storage tank and the liquid inlet of the first evaporator through the third cooling pipe. The first liquid inlet is connected to the second cooling pipe between the liquid outlet of the first evaporator and the liquid inlet of the first compressor through the fourth cooling pipe. The battery combination heat exchanger includes a second liquid inlet and a second liquid outlet; when the vehicle battery pack is charged using the charging device, the first liquid outlet is connected to the second liquid inlet and the first liquid inlet is connected to the second liquid outlet. The liquid storage tank is used to store and supply the refrigerant required by the charging station temperature control module.

2. The vehicle-mounted battery pack charging temperature management system according to claim 1, characterized in that, The vehicle-mounted temperature control device also includes a first electronic expansion valve; The first electronic expansion valve is located at the second liquid inlet, or the first electronic expansion valve is located at the second liquid outlet.

3. The vehicle-mounted battery pack charging temperature management system according to claim 1, characterized in that, The vehicle-mounted temperature control device also includes an outdoor heat exchanger, an indoor heat exchanger, a second compressor, and a fifth cooling pipeline; The outlet of the second compressor is connected to the inlet of the outdoor heat exchanger through the fifth cooling pipe; the outlet of the outdoor heat exchanger is connected to the inlet of the indoor heat exchanger through the fifth cooling pipe; and the outlet of the indoor heat exchanger is connected to the inlet of the second compressor through the fifth cooling pipe. The battery heat exchanger also includes a third liquid inlet and a third liquid outlet; the fifth cooling pipe between the liquid outlet of the outdoor heat exchanger and the liquid inlet of the indoor heat exchanger is connected to the third liquid inlet, and the fifth cooling pipe between the liquid outlet of the indoor heat exchanger and the liquid inlet of the second compressor is connected to the third liquid outlet.

4. The vehicle-mounted battery pack charging temperature management system according to claim 3, characterized in that, The vehicle-mounted temperature control device also includes a second electronic expansion valve; The second electronic expansion valve is located at the third liquid inlet.

5. The vehicle-mounted battery pack charging temperature management system according to claim 1, characterized in that, The vehicle-mounted temperature control device also includes a heating module; The heating module is disposed in the first cooling pipe; the heating module is used to heat the coolant in the first cooling pipe.

6. The vehicle-mounted battery pack charging temperature management system according to claim 1, characterized in that, The on-board temperature control device also includes a liquid pump; The liquid pump is installed in the first cooling pipe; the liquid pump is used to increase the flow rate of the coolant in the first cooling pipe during operation.

7. The vehicle-mounted battery pack charging temperature management system according to claim 1, characterized in that, The charging station cooling device also includes a recycling machine and a first solenoid valve; The liquid inlet pipe of the recovery machine is connected to each of the third cooling pipes or each of the fourth cooling pipes, and the first solenoid valve is installed in the liquid inlet pipe of the recovery machine.

8. The vehicle-mounted battery pack charging temperature management system according to claim 1, characterized in that, The charging station cooling device also includes a vacuum pump and a second solenoid valve. The inlet pipe of the vacuum pump is connected to each of the third or fourth cooling pipes, and the second solenoid valve is installed in the inlet pipe of the vacuum pump.

9. The vehicle-mounted battery pack charging temperature management system according to claim 1, characterized in that, The charging device also includes: a charging station signal detection module; The charging station signal detection module is used to receive the charging signal and the temperature signal of the vehicle battery pack, and control the working state of the charging station temperature control module according to the charging signal and the temperature signal.

10. The vehicle-mounted battery pack charging temperature management system according to claim 9, characterized in that, The charging station temperature control module also includes a third solenoid valve and a fourth solenoid valve. The third solenoid valve is disposed in the third cooling pipe; the fourth solenoid valve is disposed in the fourth cooling pipe; The charging station signal detection module is also used to control the opening or closing of the third solenoid valve and the fourth solenoid valve based on the temperature signal of the vehicle battery pack.

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