A thermal management system for battery swapping stations

Abstract

A thermal management system for a battery swapping station includes a refrigerant circuit, a battery circuit, and a charger circuit. The refrigerant circuit includes a first heat exchanger, through which the battery circuit and the refrigerant circuit can exchange heat. The battery circuit is used to exchange heat with the battery assembly. The charger circuit is connected to the battery circuit and is used to exchange heat with the charger assembly. The refrigerant circuit, the battery circuit, and the charger circuit cooperate to enable the thermal management system to have at least one operating mode. The operating modes include a battery cooling mode, a battery heating mode, a charger heat dissipation mode, a battery and charger cooling mode, and a defrosting mode. When there are two or more operating modes, the operating modes can be switched, which helps to improve the efficiency of thermal management and reduce energy loss.

Description

Technical Field

[0001] This invention relates to the field of battery swapping station technology, and in particular to a thermal management system for battery swapping stations. Background Technology

[0002] Battery swapping stations can replace the batteries of new energy vehicles within minutes, providing rapid energy replenishment. However, due to the large number of batteries stored within these stations and their frequent use, the heat generated during charging is substantial. Excessive heat can affect battery lifespan and, in severe cases, cause serious safety issues. Conversely, excessively low temperatures reduce charging efficiency and compromise swapping quality. Therefore, thermal management of the batteries within the swapping stations is crucial. Existing battery swapping stations suffer from inefficient thermal management. When ambient temperatures are low, heating the batteries requires significant time and energy, resulting in high thermal management costs. Summary of the Invention

[0003] In view of this, the purpose of this invention is to provide a thermal management system for a battery swapping station, which reduces the energy consumption of thermal management, improves thermal management efficiency, and is conducive to improving the integration and efficiency of thermal management.

[0004] This invention provides a thermal management system for a battery swapping station, comprising:

[0005] The refrigerant circuit, including the first heat exchanger,

[0006] The battery circuit and the refrigerant circuit can exchange heat through the first heat exchanger. The battery circuit is used to exchange heat with the battery assembly.

[0007] And a charger circuit, which is connected to the battery circuit, and the charger circuit is used to exchange heat with the charger assembly.

[0008] The refrigerant circuit, the battery circuit, and the charger circuit work together to enable the thermal management system to have at least one operating mode. The operating modes include battery cooling mode, battery heating mode, charger heat dissipation mode, battery and charger cooling mode, and defrosting mode. When there are two or more operating modes, the operating modes can be switched.

[0009] In one embodiment, the battery circuit includes the battery assembly, a first pump body, and a heating element connected by a second pipeline. Coolant flows through the second pipeline. The outlet side of the battery assembly is connected to the inlet side of the first pump body through the second pipeline. The heating element is connected to the outlet side of the first pump body and the inlet side of the battery assembly through the second pipeline.

[0010] In one embodiment, the battery assembly includes a battery pack and a battery valve, the battery valve being disposed between the outlet side of the battery pack and the heating element.

[0011] In one embodiment, the charger circuit includes a charger assembly, a second pump body, a third heat exchanger, a fourth valve, and a fifth valve connected by a third pipeline. Coolant flows through the third pipeline. The outlet side of the charger assembly is connected to the inlet side of the second pump body through the third pipeline. The third heat exchanger is connected to both the outlet side of the second pump body and the inlet side of the charger assembly. One end of the fourth valve is connected to the outlet side of the second pump body, and the other end is connected to the outlet side of the first pump body. One end of the fifth valve is connected to the inlet side of the charger assembly, and the other end is connected to the inlet side of the first pump body.

[0012] In one embodiment, the refrigerant circuit further includes a charger heat exchanger, through which the refrigerant circuit and the charger circuit exchange heat.

[0013] In one embodiment, the battery assembly includes at least one battery pack connected in parallel, the outlet side of the battery pack being connected to the charger circuit via a sixth valve, the charger assembly includes at least one charger unit connected in parallel, the charger circuit including a second pump body and a third heat exchanger connected by a third pipeline, the inlet side of the charger unit being connected to the outlet side of the second pump body via a seventh valve, and the outlet side of the charger unit being connected to the third heat exchanger via the sixth valve.

[0014] In one embodiment, in the battery heating mode, when the coolant temperature T at the battery assembly is less than the set value T03, the refrigerant circuit, the battery circuit, and the charger circuit are all in use. The first pump and the heating element are working. The coolant in the battery circuit absorbs heat from the refrigerant circuit through the first heat exchanger. The fourth valve and the fifth valve are open, the battery circuit and the charger circuit are connected, the second pump is working, and the third heat exchanger is not in use.

[0015] In one embodiment, when the set value T04 ≤ the coolant temperature T at the battery assembly < the set value T05, the heating element is not used; when the coolant temperature T at the battery assembly ≥ the set value T05, the refrigerant circuit is not used, the battery circuit and the charger circuit are connected, and the heating element is not used.

[0016] In one embodiment, in defrost mode, when the coolant temperature T at the battery assembly is less than the set value T10, the refrigerant circuit, the battery circuit, and the charger circuit are all put into use, the first pump and the heating element are put into use, the battery circuit and the charger circuit are connected, and the refrigerant in the refrigerant circuit absorbs heat from the battery circuit through the first heat exchange element.

[0017] In one embodiment, when the coolant temperature T at the battery assembly is greater than or equal to a set value T11, the heating element is not used, the refrigerant in the refrigerant circuit absorbs heat from the battery circuit through the first heat exchange element, and the charger circuit is connected to the battery circuit or the charger circuit operates independently.

[0018] The beneficial effects of this invention are as follows:

[0019] By coordinating the refrigerant circuit with the battery circuit, heat exchange between the refrigerant and coolant can be achieved, thereby enabling thermal management of the battery assembly. Similarly, by coordinating the charger circuit with the battery circuit, thermal management of both the battery assembly and the charger assembly can be achieved. The coordination between the refrigerant circuit, at least one battery circuit, and at least one charger circuit can meet the thermal management requirements of the battery assembly under different operating modes, offering high flexibility. Furthermore, integrating the charger circuit into the thermal management system enables heat recovery at the charger assembly and allows for temperature control of the charger assembly through the refrigerant circuit and battery circuit. This improves the integration and efficiency of thermal management, enhances the overall safety of the station, and reduces the energy consumption of thermal management. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram illustrating the overall principle of an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram illustrating the principle of a battery cooling mode according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram illustrating the principle of a battery heating mode according to an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram illustrating the principle of a charger heat dissipation mode according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram illustrating the principle of a battery and charger cooling mode according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram illustrating the principle of a defrosting mode according to an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram illustrating the overall principle of another embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram illustrating the principle of a battery heating mode according to another embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram illustrating the overall principle of another embodiment of the present invention.

[0030] In the picture:

[0031] 100-Refrigerant circuit; 101-Compressor; 102-First heat exchanger; 103-Second heat exchanger; 104-Condenser fan; 105-First valve; 106-Second valve; 107-Cabinet heat exchanger;

[0032] 200-Battery circuit; 200a-First battery pack; 200b-Second battery pack; 201-First pump body; 202-Heating element; 203-Battery pack; 204-Battery valve; 205-Third valve;

[0033] 300 - Charger circuit; 301 - Charger assembly; 301a - First charger unit; 301b - Second charger unit; 302 - Second pump body; 303 - Third heat exchanger; 304 - Fourth valve; 305 - Fifth valve; 306 - Cooling fan; 307 - Sixth valve; 308 - Seventh valve; 309 - Coolant tank. Detailed Implementation

[0034] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. Based on the description of the present invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention.

[0035] Unless otherwise explicitly specified and limited, the terms "setup," "installation," and "connection" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of these terms based on the specific circumstances.

[0036] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0037] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0038] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0039] As attached Figure 1 As shown, the battery swapping station thermal management system proposed in this invention includes:

[0040] Refrigerant circuit 100 includes a first heat exchanger 102.

[0041] The battery circuit 200 and the refrigerant circuit 100 can exchange heat through the first heat exchanger 102. The battery circuit 200 is used to exchange heat with the battery pack in the battery swapping station for thermal management of the battery pack.

[0042] The charger circuit 300 is connected to the battery circuit 200. The charger circuit 300 is used to exchange heat with the charger assembly 301 in the battery swapping station for thermal management of the charger assembly 301.

[0043] The refrigerant circuit 100, battery circuit 200 and charger circuit 300 cooperate to enable the thermal management system to have at least one working mode. The working mode includes at least one or any combination of battery cooling mode, battery heating mode, charger heat dissipation mode, battery and charger cooling mode and defrosting mode. When there are two or more working modes, the working modes can be switched.

[0044] It is understandable that the coordination between the refrigerant circuit 100, at least one battery circuit 200 and at least one charger circuit 300 includes: whether the components in each circuit are in operation, whether each circuit is switched on or off (whether it is in use) and whether each circuit is connected.

[0045] For ease of understanding, see attached. Figure 1As shown in the accompanying drawings of this invention, the lines used to connect the various components represent pipelines. (Refer to the attached drawings.) Figure 2 To facilitate understanding of the coordination relationship between circuits under different operating modes, bold lines are used to indicate that the circuit is in use.

[0046] By cooperating with the refrigerant circuit 100 and the battery circuit 200, heat exchange between the refrigerant and coolant can be achieved, thereby realizing thermal management of the battery assembly. By cooperating with the charger circuit 300 and the battery circuit 200, thermal management of the battery assembly and the charger assembly 301 can be achieved. The cooperation between the refrigerant circuit 100, at least one battery circuit 200 and at least one charger circuit 300 can meet the thermal management requirements of the battery assembly under different operating modes, which is highly flexible. Integrating the charger circuit 300 into the thermal management system can realize heat recovery at the charger assembly 301, and the temperature of the charger assembly 301 can be controlled by the refrigerant circuit 100 and the battery circuit 200, which is conducive to improving the integration and efficiency of thermal management, improving the safety of the entire station, and reducing the energy consumption of thermal management.

[0047] In one example, as shown in the attached document Figure 1 As shown, the refrigerant circuit 100 includes a compressor 101, a first heat exchanger 102, and a second heat exchanger 103 connected by a first pipeline. Refrigerant flows through the first pipeline. The compressor 101 is connected to the first heat exchanger 102 and the second heat exchanger 103 via a first valve 105. The first heat exchanger 102 and the second heat exchanger 103 are connected via a second valve 106. The first valve 105 is used to adjust the operating state of the compressor 101, thereby adjusting the refrigerant circuit 100 to be in heating mode or cooling mode. The first heat exchanger 102 is used to realize heat exchange between the refrigerant circuit 100 and the battery circuit 200. The second heat exchanger 103 is used to realize heat exchange between the refrigerant circuit 100 and the external environment.

[0048] For example, the first valve 105 is a four-way reversing valve. When the first valve 105 is energized, the refrigerant circuit 100 is in heating mode, and when the first valve 105 is not energized, the refrigerant circuit 100 is in cooling mode.

[0049] For example, the second valve 106 is an expansion valve whose opening degree is controlled by the refrigerant temperature at the outlet of the first heat exchanger 102.

[0050] For example, a condenser fan 104 is also provided at the second heat exchanger 103. The condenser fan 104 cooperates with the second heat exchanger 103 to improve the heat exchange efficiency.

[0051] When the refrigerant circuit 100 is in heating or defrosting mode, the speed of the condenser fan 104 is controlled according to the condensing pressure value of the second heat exchanger 103. The higher the condensing pressure value, the higher the speed of the condenser fan 104. If the condensing pressure value is large, the condenser fan 104 is turned on; if the condensing pressure value is small, the condenser fan 104 is turned off.

[0052] When the refrigerant circuit 100 is in cooling mode, the speed of the condenser fan 104 is controlled according to the evaporation pressure value of the second heat exchanger 103. The lower the evaporation pressure value, the higher the speed of the condenser fan 104. If the evaporation pressure value is small, the condenser fan 104 is turned on; if the evaporation pressure value is large, the condenser fan 104 is turned off.

[0053] In one example, as shown in the attached document Figure 1 As shown, the battery circuit 200 includes a battery assembly, a first pump body 201, and a heating element 202 connected by a second pipeline. Coolant flows through the second pipeline. The outlet side of the battery assembly is connected to the inlet side of the first pump body 201 through the second pipeline. The outlet side of the first pump body 201 cooperates with the first heat exchange element 102 to achieve heat exchange. The outlet side of the heating element 202 and the inlet side of the first pump body 201 are connected to the inlet side of the battery assembly through the second pipeline.

[0054] For example, the heating element 202 is a PTC heater (Positive Temperature Coefficient).

[0055] For example, as shown in the appendix Figure 1 As shown, the battery assembly includes a battery pack 203 and a battery valve 204. The outlet side of the battery pack 203 is connected to the heating element 202 via the battery valve 204. The number of battery packs 203 and battery valves 204 are correspondingly arranged to achieve independent control of each battery pack 203. The on / off state of the battery valve 204 can be controlled according to the needs of different battery packs 203, thereby meeting different thermal management requirements. In an optional embodiment, the battery valve 204 is a solenoid valve.

[0056] For example, the connection between the battery assembly and the second pipeline can be achieved through a heat exchanger to exchange heat between the battery pack 203 and the coolant flowing in the second pipeline.

[0057] For example, the battery circuit 200 further includes a third valve 205, which cooperates with the first pump body 201 to control the rotational speed of the first pump body 201, thereby regulating the pressure and flow rate of the coolant in the second pipeline to stabilize the flow of the coolant. In an optional embodiment, the third valve 205 is a bypass valve.

[0058] For example, the battery circuit 200 also includes a coolant tank to supply coolant to the second pipeline, and the coolant inlet and outlet can also be externally located in the second pipeline, which can be configured according to actual needs by those skilled in the art.

[0059] In one example, as shown in the attached document Figure 1 As shown, the charger circuit 300 includes a charger assembly 301, a second pump body 302, a third heat exchanger 303, a fourth valve 304, and a fifth valve 305 connected by a third pipeline. Coolant flows through the third pipeline. The outlet side of the charger assembly 301 is connected to the inlet side of the second pump body 302 through the third pipeline. The third heat exchanger 303 is connected to the outlet side of the second pump body 302 and the inlet side of the charger assembly 301 to form a closed loop. One end of the fourth valve 304 is connected to the outlet side of the second pump body 302, and the other end is connected to the outlet side of the first pump body 201. One end of the fifth valve 305 is connected to the inlet side of the charger assembly 301, and the other end is connected to the inlet side of the first pump body 201.

[0060] The third heat exchanger 303 is used to exchange heat between the coolant in the third pipeline and the external environment to regulate the temperature of the coolant in the third pipeline. The fourth valve 304 and the fifth valve 305 work together to control the on / off state of the battery circuit 200 and the charger circuit 300. Understandably, the fourth valve 304 and the fifth valve 305 open and close simultaneously.

[0061] For example, the fourth valve 304 is an inlet solenoid valve, and the fifth valve 305 is a return solenoid valve.

[0062] For example, the third heat exchanger 303 employs a dry cooler, as shown in the attached diagram. Figure 1 As shown, the charger circuit 300 also includes a cooling fan 306, which works in conjunction with the third heat exchanger 303 to improve the heat exchange efficiency of the third heat exchanger 303.

[0063] For example, the coolant in the battery circuit 200 and the charger circuit 300 is an aqueous solution of ethylene glycol.

[0064] Example 1

[0065] Mode 1: Battery Cooling Mode

[0066] In this mode, the battery assembly requires cooling, the charger assembly 301 does not require cooling, and the charger circuit 300 is not in use.

[0067] As attached Figure 2As shown, when the coolant temperature T at the battery assembly is greater than the set value T01, both the refrigerant circuit 100 and the battery circuit 200 are put into use. The refrigerant circuit 100 and the battery circuit 200 exchange heat through the first heat exchanger 102. In the battery circuit 200, the first pump 201 is working and the heating element 202 is not in use. The coolant temperature in the second pipeline is reduced through the refrigerant circuit 100 to cool the battery assembly.

[0068] When the coolant temperature T at the battery assembly is less than the set value T02, the cooling requirement of the battery assembly is met. The refrigerant circuit 100 is not used, only the battery circuit 200 is used, the first pump 201 works, and the battery assembly is cooled down through the battery circuit 200.

[0069] For example, the coolant temperature T at the battery assembly can be the coolant temperature at the battery assembly inlet side or the coolant temperature at the battery assembly outlet side. Temperature detection devices can be arranged according to actual needs to collect the coolant temperature at the corresponding location.

[0070] Mode 2: Battery Heating Mode

[0071] In this mode, the battery assembly requires heating, and the charger assembly 301 requires cooling.

[0072] As attached Figure 3 As shown, when the coolant temperature T at the battery assembly is less than the set value T03, the refrigerant circuit 100, battery circuit 200, and charger circuit 300 are all in operation. The refrigerant circuit 100 and battery circuit 200 exchange heat through the first heat exchanger 102. The coolant in the battery circuit 200 absorbs heat from the refrigerant circuit 100 through the first heat exchanger 102, and the coolant temperature in the second pipeline rises. In the battery circuit, the first pump 201 and the heating element 202 are in operation to heat the coolant in the second pipeline. In the charger circuit 300, the fourth valve 304 and the fifth valve 305 are both open, and the charger circuit 300 is connected to the battery circuit 200. The second pump 302 is working, and the third heat exchanger 303 is not in operation. The second pump 302 provides power to the coolant. The coolant in the third pipeline can absorb heat from the charger assembly, allowing the coolant in the third pipeline to enter the second pipeline.

[0073] The charger circuit 300 can preheat the coolant in the battery circuit 200. In conjunction with the heating element 202 and the first heat exchange element 102, the heating efficiency of the coolant in the battery circuit 200 can be improved, thereby improving the heating efficiency of the battery.

[0074] When the set value T04 ≤ the coolant temperature T at the battery assembly < the set value T05, the heating element 202 in the battery circuit 200 is not used. The coolant temperature in the battery circuit 200 can meet the heating requirements of the battery assembly under the combined action of the refrigerant circuit 100 and the charger circuit 300.

[0075] When the coolant temperature T at the battery assembly is greater than or equal to the set value T05, the refrigerant circuit 100 is not used, the heating element 202 is not used, and the charger circuit 300 continues to be used. The battery circuit 200 and the charger circuit 300 work together to meet the heating requirements of the battery assembly.

[0076] When the coolant temperature T at the battery assembly is greater than the set value T06, the coolant temperature in the battery circuit 200 is higher than the system's safe operating temperature. The first pump 201 is shut off, and the battery circuit 200 stops operating to avoid affecting the safety of the battery assembly due to excessively high coolant temperature in the battery circuit 200. The fourth valve 304 and the fifth valve 305 are closed, and the charger circuit 300 is not connected to the battery circuit 200.

[0077] The charger circuit 300 can operate independently or stop operating according to control requirements. When the charger circuit 300 operates independently, the second pump 302 is activated. When the charger circuit 300 stops operating, the second pump 302 is deactivated.

[0078] Mode 3: Charger heat dissipation mode

[0079] In this mode, the battery pack has no thermal management requirements, the charger assembly 301 has cooling requirements, and the charger circuit 300 is put into use.

[0080] As attached Figure 4 As shown, the fourth valve 304 and the fifth valve 305 are closed, the second pump body 302 is working, and the charger circuit 300 is put into use.

[0081] When the coolant temperature T1 at the charger assembly 301 is greater than the set value T07, the temperature of the charger assembly 301 will not be too high. Only the second pump body 302 works, the coolant in the third pipe circulates, and heat is exchanged with the external environment through the pipe wall of the third pipe to reduce the coolant temperature in the third pipe. The coolant in the third pipe exchanges heat with the charger assembly 301, and the charger assembly 301 cools down by natural heat dissipation.

[0082] When the coolant temperature T1 at the charger assembly 301 is greater than or equal to the set value T08, the temperature of the charger assembly 301 is high. The coolant in the third pipeline cannot meet the cooling requirements of the charger assembly 301 by natural heat dissipation alone. Therefore, the third heat exchanger 303 and the cooling fan 306 are put into use. The third heat exchanger 303 realizes forced heat dissipation between the coolant in the third pipeline and the external environment, so as to efficiently and quickly reduce the coolant temperature in the third pipeline to meet the cooling requirements of the charger assembly 301.

[0083] Mode 4: Battery and Charger Cooling Mode

[0084] In this mode, the battery assembly has a cooling requirement, the charger assembly 301 has a cooling requirement, the charger circuit 300 operates independently, the battery circuit 200 operates, and the refrigerant circuit 100 operates selectively.

[0085] As attached Figure 5 As shown, the fourth valve 304 and the fifth valve 305 are closed, the second pump 302 is activated, and the charger circuit 300 is put into use. When the coolant temperature T1 at the charger assembly 301 is greater than the set value T07, only the second pump 302 is activated, and the charger assembly 301 is cooled by natural heat dissipation; when the coolant temperature T1 at the charger assembly 301 is greater than or equal to the set value T08, the third heat exchanger 303 and the cooling fan 306 are activated, and the charger assembly 301 is cooled by forced heat dissipation.

[0086] When the coolant temperature T at the battery assembly is greater than the set value T01, both the refrigerant circuit 100 and the battery circuit 200 are put into use. In the battery circuit 200, the first pump 201 works, which lowers the coolant temperature in the second pipeline through the refrigerant circuit 100 to cool the battery assembly. When the coolant temperature T at the battery assembly is less than the set value T02, the refrigerant circuit 100 is not put into use, only the battery circuit 200 is put into use, the first pump 201 works, and the battery assembly is cooled through the battery circuit 200.

[0087] Mode 5: Defrosting Mode

[0088] In this mode, the battery assembly requires heating, the charger assembly 301 requires cooling, and the refrigerant circuit 100, battery circuit 200, and charger circuit 300 are all put into use.

[0089] As attached Figure 6As shown, when the coolant temperature T at the battery assembly is less than the set value T09, the fourth valve 304 and the fifth valve 305 open, connecting the battery circuit 200 to the charger circuit 300. In the battery circuit 200, the first pump 201 and the heating element 202 are both operational. The charger circuit 300 preheats the coolant in the second pipeline, and in conjunction with the heating element 202, achieves efficient temperature rise. The coolant exchanges heat with the refrigerant circuit 100 in the battery circuit 200 through the first heat exchange element 102. The refrigerant in the first pipeline... The first heat exchanger 102 absorbs heat from the coolant in the second pipe to achieve defrosting and cooling down the charger assembly 301. When the coolant temperature T at the battery assembly is greater than or equal to the set value T10, the coolant temperature in the battery circuit 200 can meet the defrosting requirements. The heating element 202 is not used. The refrigerant in the first pipe still absorbs heat from the coolant in the second pipe through the first heat exchanger 102 to achieve defrosting. At this time, the charger circuit 300 is connected to the battery circuit 200, or the charger circuit 300 operates independently.

[0090] When the coolant temperature T at the battery assembly is greater than or equal to the set value T11, the coolant temperature in the battery circuit 200 is too high. Both the refrigerant circuit 100 and the battery circuit 200 stop operating to avoid affecting the safety of the battery assembly due to the excessively high coolant temperature in the battery circuit 200. The fourth valve 304 and the fifth valve 305 are closed, and the charger circuit 300 is not connected to the battery circuit 200. At this time, the charger circuit 300 operates independently or stops operating.

[0091] Example 2

[0092] As attached Figure 7 As shown, the refrigerant circuit 100 includes a compressor 101, a first heat exchanger 102, and a second heat exchanger 103 connected by a first pipeline. Refrigerant flows through the first pipeline. The first heat exchanger 102 and the second heat exchanger 103 are connected by a second valve 106. The first heat exchanger 102 is used to realize heat exchange between the refrigerant circuit 100 and the battery circuit 200, and the second heat exchanger 103 is used to realize heat exchange between the refrigerant circuit 100 and the external environment.

[0093] Compared to the refrigerant circuit 100 in Embodiment 1, in this embodiment, the refrigerant circuit 100 cannot adjust the working state of the compressor 101 through the first valve 105 so that the refrigerant circuit 100 can switch between heating mode and cooling mode. The refrigerant circuit 100 can only realize the cooling function.

[0094] As attached Figure 8As shown, when the thermal management system is in battery heating mode, the battery circuit 200 and charger circuit 300 are in use. In the battery circuit, the first pump 201 and the heating element 202 are in use to heat the coolant in the second pipeline. In the charger circuit 300, the fourth valve 304 and the fifth valve 305 are both open, and the charger circuit 300 is connected to the battery circuit 200. The second pump 302 is working, and the third heat exchange element 303 is not in use. The second pump 302 provides power to the coolant. The coolant in the third pipeline can absorb the heat from the charger assembly, allowing the coolant in the third pipeline to enter the second pipeline. The charger circuit 300 and the heating element 202 work together to heat the battery assembly and recover the heat from the charger assembly 301, which helps to improve the heating efficiency of the battery assembly and reduce overall energy consumption.

[0095] Example 3

[0096] In conjunction with Embodiment 1, in this embodiment, as shown in the appendix Figure 9 As shown, the refrigerant circuit 100 also includes a charger heat exchange component 107. The refrigerant circuit 100 and the charger circuit 300 exchange heat through the charger heat exchange component 107 to cool down the charger assembly 301.

[0097] As attached Figure 9 As shown, the battery assembly includes at least one battery pack, which is connected in parallel. The inlet side of the battery pack is connected to the heating element 202, and the outlet side of the battery pack is connected to the charger circuit 300 via a sixth valve 307. The charger assembly 301 includes at least one charger unit, which is connected in parallel. The outlet side of the charger unit is connected to the outlet side of the battery pack via a sixth valve 307. In the charger circuit 300, the inlet side of the charger unit is connected to the outlet side of the second pump body 302 via a seventh valve 308, and the outlet side of the charger unit is connected to the third heat exchange element 303 via a sixth valve 307. The sixth valve 307 enables the switching of the battery circuit 200 and the charger circuit 300. One charger unit is used to charge one battery pack.

[0098] For example, the outlet side of the battery pack is connected to the coolant tank 309, the outlet side of the battery pack is connected to the sixth valve 307 through the coolant tank 309, and a seventh valve 308 is provided between the coolant tank 309 and the inlet side of the second pump body 302.

[0099] For example, the sixth valve 307 is a three-way valve.

[0100] As attached Figure 9As shown, taking a battery assembly including two battery packs and a charger assembly 301 including two chargers as an example, the battery assembly includes a first battery pack 200a and a second battery pack 200b, and the charger assembly 301 includes a first charger assembly 301a and a second charger assembly 301b. The first charger assembly 301a is used to charge the first battery pack 200a, and the second charger assembly 301b is used to charge the second battery pack 200b.

[0101] For example, each battery pack includes a battery pack 203 and a battery valve 204. The connection of the battery pack to the battery circuit 200 can be controlled by opening and closing the battery valve 204. When different battery packs require the same operating mode, they can be directly connected to the battery circuit 200. When different battery packs require different operating modes, for example, the first battery pack 200a requests a heating mode and the second battery pack 200b requests a cooling mode, the entire thermal management system executes the cooling mode.

[0102] In battery heating mode, when the first charger 301a is charging and the first battery pack 200a or the second battery pack 200b requires heating, the seventh valve 308 on the inlet side of the first charger 301a opens, and the sixth valve 307 connects the outlet side of the first charger 301a to the coolant tank 309. The second pump 302 operates to recover the heat from the first charger 301a into the coolant tank 309, and then enters the battery circuit 200 through the coolant tank 309 to heat the first battery pack 200a or the second battery pack 200b.

[0103] In charger cooling mode, or in battery and charger cooling mode, when the coolant temperature T1 at the charger assembly 301 is greater than or equal to the set value T12, the temperature of the charger assembly 301 is too high, affecting the safe operation of the system. When the forced cooling through the third heat exchanger 303 and the cooling fan 306 cannot meet the cooling requirements of the charger assembly 301, the refrigerant circuit 100 and the charger circuit 300 are put into use, and heat exchange is achieved through the charger heat exchanger 107. The refrigerant in the first pipeline absorbs the heat of the coolant in the third pipeline, thereby achieving cooling of the charger assembly 301 to prevent overheating and damage to the charger assembly 301, or to reduce power operation due to long-term operation in high-temperature environments, thus reducing energy loss.

[0104] In defrost mode, the battery circuit 200 and the charger circuit 300 may or may not be connected. When the battery circuit 200 and the charger circuit 300 are connected, the basic principle is the same as in Embodiment 1. Only the first heat exchange component 102 in the refrigerant circuit 100 is put into use, and the charger heat exchange component 107 is not put into use.

[0105] When the battery circuit 200 and the charger circuit 300 are not connected, both the first heat exchanger 102 and the charger heat exchanger 107 are in use. The refrigerant circuit 100 exchanges heat with the battery circuit 200 through the first heat exchanger 102. The refrigerant in the first pipeline absorbs heat from the coolant in the second pipeline. The refrigerant circuit 100 exchanges heat with the charger circuit 300 through the charger heat exchanger 107. The refrigerant in the first pipeline absorbs heat from the coolant in the third pipeline.

[0106] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A thermal management system for a battery swapping station, characterized in that, include: The refrigerant circuit (100) includes a first heat exchanger (102) and a charger heat exchanger (107). A battery circuit (200) is provided, which exchanges heat with the refrigerant circuit (100) via the first heat exchanger (102). The battery circuit (200) is used to exchange heat with the battery assembly, which includes at least one battery pack connected in parallel. The system includes a charger circuit (300), which exchanges heat with the refrigerant circuit (100) via a charger heat exchanger (107). The charger circuit (300) is also connected to the battery circuit (200). The charger circuit (300) is used to exchange heat with the charger assembly (301). The charger assembly (301) includes at least one charger unit, and at least one charger unit is connected in parallel. The outlet side of the battery pack is connected to the charger circuit (300) via a sixth valve (307). The charger circuit (300) includes a second pump body (302) and a third heat exchanger (303) connected by a third pipeline. The inlet side of the charger is connected to the outlet side of the second pump body (302) via a seventh valve (308), and the outlet side of the charger is connected to the third heat exchanger (303) via the sixth valve (307). The refrigerant circuit (100), the battery circuit (200), and the charger circuit (300) cooperate to enable the thermal management system to have at least one working mode. The working modes include battery cooling mode, battery heating mode, charger heat dissipation mode, battery and charger cooling mode, and defrosting mode. When there are two or more working modes, the working modes can be switched.

2. The battery swapping station thermal management system according to claim 1, characterized in that, The battery circuit (200) includes the battery assembly, the first pump body (201), and the heating element (202) connected by a second pipeline. Coolant flows through the second pipeline. The outlet side of the battery assembly is connected to the inlet side of the first pump body (201) through the second pipeline. The heating element (202) is connected to the outlet side of the first pump body (201) and the inlet side of the battery assembly through the second pipeline.

3. The battery swapping station thermal management system according to claim 2, characterized in that, The battery assembly includes a battery pack (203) and a battery valve (204), wherein the battery valve (204) is located between the outlet side of the battery pack (203) and the heating element (202).

4. The battery swapping station thermal management system according to claim 2, characterized in that, The charger circuit (300) includes a charger assembly (301), a second pump body (302), a third heat exchanger (303), a fourth valve (304), and a fifth valve (305) connected by a third pipeline. Coolant flows through the third pipeline. The outlet side of the charger assembly (301) is connected to the inlet side of the second pump body (302) through the third pipeline. The third heat exchanger (303) is connected to the outlet side of the second pump body (302) and the inlet side of the charger assembly (301). One end of the fourth valve (304) is connected to the outlet side of the second pump body (302), and the other end is connected to the outlet side of the first pump body (201). One end of the fifth valve (305) is connected to the inlet side of the charger assembly (301), and the other end is connected to the inlet side of the first pump body (201).

5. The battery swapping station thermal management system according to claim 4, characterized in that, In the battery heating mode, when the coolant temperature T at the battery assembly is less than the set value T03, the refrigerant circuit (100), the battery circuit (200), and the charger circuit (300) are all put into use. The first pump (201) and the heating element (202) are working. The coolant in the battery circuit (200) absorbs heat from the refrigerant circuit (100) through the first heat exchanger (102). The fourth valve (304) and the fifth valve (305) are opened. The battery circuit (200) and the charger circuit (300) are connected. The second pump (302) is working. The third heat exchanger (303) is not in use.

6. The battery swapping station thermal management system according to claim 5, characterized in that, When the set value T04 ≤ the coolant temperature T at the battery assembly < the set value T05, the heating element (202) is not used. When the coolant temperature T at the battery assembly ≥ the set value T05, the refrigerant circuit (100) is not used. The battery circuit (200) and the charger circuit (300) are connected, and the heating element (202) is not used.

7. The battery swapping station thermal management system according to claim 4, characterized in that, In defrost mode, when the coolant temperature T at the battery assembly is less than the set value T09, the refrigerant circuit (100), the battery circuit (200), and the charger circuit (300) are all put into use. The first pump body (201) and the heating element (202) are put into use. The battery circuit (200) and the charger circuit (300) are connected. The refrigerant in the refrigerant circuit (100) absorbs heat from the battery circuit (200) through the first heat exchange element (102).

8. The battery swapping station thermal management system according to claim 7, characterized in that, When the coolant temperature T at the battery assembly is greater than or equal to the set value T10, the heating element (202) is not used, the refrigerant in the refrigerant circuit (100) absorbs heat from the battery circuit (200) through the first heat exchange element (102), the charger circuit (300) is connected to the battery circuit (200), or the charger circuit (300) operates independently.

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