Thermal management system of battery swap station

Abstract

A battery swap station thermal management system comprises a refrigerant loop, a battery loop and a charger loop, the refrigerant loop comprises a first heat exchange part, heat exchange can be conducted between the battery loop and the refrigerant loop through the first heat exchange part, and the battery loop is used for achieving heat exchange with a battery assembly. The refrigerant loop can be communicated with the battery loop, the charger loop can be communicated with the battery loop, the charger loop is used for realizing heat exchange with a charger assembly, and the refrigerant loop, the battery loop and the charger loop are matched, so that the thermal management system has at least one working mode. The working modes comprise a battery cooling mode, a battery heating mode, a charger heat dissipation mode, a battery and charger cooling mode and a defrosting mode, when the number of the working modes is two or more than two, the working modes can be switched, the heat management efficiency can be improved, and the energy loss is reduced.

Description

Technical Field

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

[0002] Battery swap stations can complete battery replacement for new energy vehicles within a few minutes and provide rapid energy replenishment. Since a large number of batteries are stored in battery swap stations and the batteries are used frequently, the heat dissipated during the charging process is huge. Excessive temperature will affect the service life of the battery, and in severe cases, it will cause serious safety problems. Excessive low temperature will reduce the charging efficiency on the battery side and affect the quality of battery swapping. Therefore, it is necessary to perform thermal management on the batteries in the battery swap station. The thermal management efficiency of existing battery swap stations is low. When the ambient temperature is low, it takes a long time to heat the battery, and the heating power consumption is large, resulting in high thermal management costs. Summary of the invention

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

[0004] The present invention provides a thermal management system for a battery swap station, comprising:

[0005] A refrigerant circuit includes a first heat exchange element,

[0006] A battery circuit, wherein the battery circuit and the refrigerant circuit can exchange heat via the first heat exchange element, and the battery circuit is used to exchange heat with the battery assembly.

[0007] and a charger circuit, the charger circuit being communicable with the battery circuit, the charger circuit being used to achieve heat exchange with the charger assembly,

[0008] The refrigerant circuit, the battery circuit and the charger circuit cooperate so that the thermal management system has at least one operating mode, and 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 defrost 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, the first pump body and the heating element connected by a second pipeline, the second pipeline flows with coolant, the outlet side of the battery assembly is connected to the inlet side of the first pump body through the second pipeline, and 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 component, and the battery valve component is disposed between the outlet side of the battery pack and the heating component.

[0011] In one embodiment, the charger circuit includes a charger assembly, a second pump body, a third heat exchange component, a fourth valve component and a fifth valve component connected by a third pipeline, coolant flows in 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 exchange component is connected to the outlet side of the second pump body and the inlet side of the charger assembly, one end of the fourth valve component 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 component 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 exchange component, and heat is exchanged between the refrigerant circuit and the charger circuit via the charger heat exchange component.

[0013] In one embodiment, the battery assembly includes at least one battery pack, at least one of the battery packs is connected in parallel, the outlet side of the battery pack is connected to the charger circuit through a sixth valve component, the charger assembly includes at least one charger unit, at least one of the charger units is connected in parallel, the charger circuit includes a second pump body and a third heat exchange element connected by a third pipeline, the inlet side of the charger unit is connected to the outlet side of the second pump body through a seventh valve component, and the outlet side of the charger unit is connected to the third heat exchange element through the sixth valve component.

[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 put into use, the first pump body and the heating element work, the coolant in the battery circuit absorbs heat from the refrigerant circuit through the first heat exchange element, the fourth valve element and the fifth valve element are opened, the battery circuit and the charger circuit are connected, the second pump body works, and the third heat exchange element is not put into 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 put into use; when the coolant temperature T at the battery assembly≥the set value T05, the refrigerant circuit is not put into use, the battery circuit and the charger circuit are connected, and the heating element is not put into use.

[0016] In one embodiment, in the 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 body 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 ≥ the 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, the charger circuit is connected to the battery circuit, or the charger circuit operates independently.

[0018] The beneficial effects of the present invention are:

[0019] Through the cooperation of the refrigerant circuit and the battery circuit, heat exchange between the refrigerant and the coolant can be achieved, thereby realizing thermal management of the battery assembly; through the cooperation of the charger circuit and the battery circuit, thermal management of the battery assembly and the charger assembly can be realized; the cooperation 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 working modes, with strong flexibility, and by incorporating the charger circuit into the thermal management system, heat recovery at the charger assembly can be realized, and the temperature of the charger assembly can be controlled through the refrigerant circuit and the battery circuit, 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

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

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

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

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

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

[0026] Figure 6 It is a schematic diagram of the principle of the defrosting mode of an embodiment of the present invention;

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

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

[0029] Fig. 9 The figure is a schematic diagram of the overall principle of another embodiment of the present invention.

[0030] In the figure:

[0031] 100-refrigerant circuit; 101-compressor; 102-first heat exchange element; 103-second heat exchange element; 104-condensing fan; 105-first valve element; 106-second valve element; 107-charger heat exchange element;

[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 element; 205-third valve element;

[0033] 300-charger circuit; 301-charger assembly; 301a-first charging unit; 301b-second charging unit; 302-second pump body; 303-third heat exchange component; 304-fourth valve component; 305-fifth valve component; 306-cooling fan; 307-sixth valve component; 308-seventh valve component; 309-coolant tank. DETAILED DESCRIPTION

[0034] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the description of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Unless otherwise clearly specified and limited, the terms "disposed", "installed", "connected" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] The directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front”, “back”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0037] The terms "first", "second", "third" and the like are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0038] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0039] As attached Figure 1 As shown, the thermal management system of the battery swap station proposed by the present invention includes:

[0040] The refrigerant circuit 100 includes a first heat exchange element 102,

[0041] The battery circuit 200 can exchange heat with the refrigerant circuit 100 through the first heat exchange element 102. The battery circuit 200 is used to exchange heat with the battery assembly in the battery swap station to perform thermal management on the battery assembly.

[0042] and a charger circuit 300, which can be connected to the battery circuit 200, and is used to exchange heat with a charger assembly 301 in the battery swap station to perform thermal management on the charger assembly 301.

[0043] 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, and the working mode includes at least one of a battery cooling mode, a battery heating mode, a charger heat dissipation mode, a battery and charger cooling mode and a defrosting mode or any combination thereof. When there are two or more working modes, the working modes can be switched.

[0044] It can be understood that the coordination between the above-mentioned refrigerant circuit 100, at least one battery circuit 200 and at least one charger circuit 300 includes: whether the components in each circuit are put into operation, the on and off of each circuit (whether it is put into use) and the connectivity of each circuit.

[0045] For ease of understanding, please see the attached Figure 1As shown, the lines used to connect the components in the drawings of the present invention represent pipelines, and the Figure 2 In order to facilitate understanding of the coordination relationship between various circuits in different working modes, bold lines are used to indicate that the circuit is put into use.

[0046] Through the cooperation between the refrigerant circuit 100 and the battery circuit 200, heat exchange between the refrigerant and the coolant can be achieved, thereby realizing thermal management of the battery assembly; through the cooperation between the charger circuit 300 and the battery circuit 200, thermal management of the battery assembly and the charger assembly 301 can be realized; 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 working modes, with strong flexibility, and the charger circuit 300 is incorporated into the thermal management system to realize heat recovery at the charger assembly 301, and the temperature of the charger assembly 301 can be controlled through 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 Figure 1 As shown, the refrigerant circuit 100 includes a compressor 101, a first heat exchange element 102 and a second heat exchange element 103 connected by a first pipeline, and refrigerant flows in the first pipeline. The compressor 101 is connected to the first heat exchange element 102 and the second heat exchange element 103 through a first valve element 105, and the first heat exchange element 102 and the second heat exchange element 103 are connected through a second valve element 106. The first valve element 105 is used to adjust the working state of the compressor 101, thereby adjusting the refrigerant circuit 100 to be in a heating mode or a cooling mode. The first heat exchange element 102 is used to realize heat exchange between the refrigerant circuit 100 and the battery circuit 200, and the second heat exchange element 103 is used to realize heat exchange between the refrigerant circuit 100 and the external environment.

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

[0049] Exemplarily, the second valve element 106 is an expansion valve, and the opening degree of the expansion valve is controlled by the refrigerant temperature at the outlet of the first heat exchange element 102 .

[0050] Exemplarily, a condensing fan 104 is further provided at the second heat exchange element 103 , and the condensing fan 104 cooperates with the second heat exchange element 103 to improve the heat exchange efficiency.

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

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

[0053] In one example, as shown in the attached 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, a coolant flows in 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 realize heat exchange, and the outlet side of the first pump body 201 of the heating element 202 and the inlet side of the battery assembly are connected through the second pipeline.

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

[0055] For example, as shown in the attached 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 through the battery valve 204. The number of battery packs 203 and battery valve 204 is set correspondingly to achieve independent control of each group of battery packs 203. The on and off 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 solution, the battery valve 204 adopts a solenoid valve.

[0056] Exemplarily, the connection between the battery assembly and the second pipeline can be achieved through a heat exchanger, so that the battery pack 203 can be heat exchanged through the coolant flowing in the second pipeline.

[0057] Exemplarily, the battery circuit 200 further includes a third valve member 205, which cooperates with the first pump body 201 to control the rotation speed of the first pump body 201, so as to adjust the pressure and flow rate of the coolant in the second pipeline to stabilize the circulation of the coolant. In an optional solution, the third valve member 205 is a bypass valve.

[0058] Exemplarily, the battery circuit 200 further includes a coolant tank to provide coolant to the second pipeline, and an external coolant inlet and outlet may also be provided in the second pipeline, which can be configured by those skilled in the art according to actual needs.

[0059] In one example, as shown in the attached Figure 1 As shown, the charger circuit 300 includes a charger assembly 301, a second pump body 302, a third heat exchange component 303, a fourth valve component 304 and a fifth valve component 305 connected by a third pipeline. Coolant flows in 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 exchange component 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 component 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 component 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 exchange component 303 is used to realize heat exchange between the coolant in the third pipeline and the external environment to adjust the temperature of the coolant in the third pipeline. The fourth valve component 304 and the fifth valve component 305 cooperate to realize the on-off control of the battery circuit 200 and the charger circuit 300. It can be understood that the fourth valve component 304 and the fifth valve component 305 are opened and closed at the same time.

[0061] Exemplarily, the fourth valve component 304 is a water inlet solenoid valve, and the fifth valve component 305 is a water return solenoid valve.

[0062] Exemplarily, the third heat exchange element 303 is a dry cooler, such as the attached Figure 1 As shown, the charger circuit 300 further includes a heat dissipation fan 306 , and the heat dissipation fan 306 is used to cooperate with the third heat exchange element 303 to improve the heat exchange efficiency of the third heat exchange element 303 .

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

[0064] Embodiment 1

[0065] Mode 1: Battery cooling mode

[0066] In this mode, the battery assembly has a cooling requirement, the charger assembly 301 has no cooling requirement, and the charger circuit 300 is not put into use.

[0067] As attached Figure 2As shown, when the coolant temperature T at the battery assembly is greater than the set value T01, the refrigerant circuit 100 and the battery circuit 200 are both put into use, and heat exchange is achieved between the refrigerant circuit 100 and the battery circuit 200 through the first heat exchange element 102. In the battery circuit 200, the first pump body 201 is working, and the heating element 202 is not put into 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 demand of the battery assembly is met, the refrigerant circuit 100 is not put into use, only the battery circuit 200 is put into use, the first pump body 201 works, and the battery assembly is cooled down through the battery circuit 200.

[0069] Exemplarily, the coolant temperature T at the battery assembly can be the coolant temperature at the inlet side of the battery assembly, or the coolant temperature at the outlet side of the battery assembly. Temperature detection components can be arranged according to actual needs to collect the coolant temperature at the corresponding position.

[0070] Mode 2: Battery heating mode

[0071] In this mode, the battery assembly needs to be heated and the charger assembly 301 needs to be cooled.

[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, the battery circuit 200 and the charger circuit 300 are all put into use, and heat exchange is achieved between the refrigerant circuit 100 and the battery circuit 200 through the first heat exchange element 102. The coolant in the battery circuit 200 absorbs heat from the refrigerant circuit 100 through the first heat exchange element 102, and the temperature of the coolant in the second pipeline increases. In the battery circuit, the first pump body 201 and the heating element 202 are put into use to heat the coolant in the second pipeline. In the charger circuit 300, the fourth valve element 304 and the fifth valve element 305 are both opened, the charger circuit 300 is connected with the battery circuit 200, the second pump body 302 works, the third heat exchange element 303 is not put into use, the second pump body 302 provides coolant power, and the coolant in the third pipeline can absorb the heat at the charger assembly, so that the coolant in the third pipeline enters the second pipeline.

[0073] The charger circuit 300 can preheat the coolant in the battery circuit 200 , and in combination 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 setting value T04 ≤ the coolant temperature T at the battery assembly < the setting value T05, at this time, the heating element 202 in the battery circuit 200 is not used, and the coolant temperature in the battery circuit 200 can meet the heating demand of the battery assembly under the cooperation 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 cooperate to meet the heating demand 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 temperature for safe operation of the system, the first pump body 201 is closed, and the battery circuit 200 stops running to avoid affecting the safety of the battery assembly due to the excessively high coolant temperature in the battery circuit 200, the fourth valve member 304 and the fifth valve member 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 body 302 works. When the charger circuit 300 stops operating, the second pump body 302 is turned off.

[0078] Mode 3: Charger cooling mode

[0079] In this mode, the battery assembly 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 member 304 and the fifth valve member 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 is not too high, and only the second pump body 302 works. The coolant in the third pipeline circulates and exchanges heat with the external environment through the wall of the third pipeline to reduce the coolant temperature in the third pipeline. The coolant in the third pipeline exchanges heat with the charger assembly 301, and the charger assembly 301 is cooled by natural heat dissipation.

[0082] When the coolant temperature T1 at the charger assembly 301 is ≥ the set value T08, the temperature of the charger assembly 301 is relatively high, and the coolant in the third pipeline cannot meet the cooling demand of the charger assembly 301 by natural heat dissipation alone. Therefore, the third heat exchange component 303 and the cooling fan 306 are put into use. The third heat exchange component 303 is used to realize 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 demand of the charger assembly 301.

[0083] Mode 4: Battery and charger cooling mode

[0084] In this mode, the battery assembly has a cooling demand, the charger assembly 301 has a cooling demand, 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 member 304 and the fifth valve member 305 are closed, the second pump body 302 is working, 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 body 302 is working, 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 put into use, 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 body 201 works to reduce 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, and only the battery circuit 200 is put into use. The first pump body 201 works to cool the battery assembly through the battery circuit 200.

[0087] Mode 5: Defrost mode

[0088] In this mode, the battery assembly has a heating requirement, the charger assembly 301 has a cooling requirement, and the refrigerant circuit 100, the battery circuit 200 and the 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 member 304 and the fifth valve member 305 are opened, the battery circuit 200 is connected to the charger circuit 300, and the first pump body 201 and the heating element 202 are both put into use in the battery circuit 200. The coolant in the second pipeline can be preheated by the charger circuit 300, and the heating element 202 is used to achieve efficient temperature increase. The coolant in the battery circuit 200 exchanges heat with the refrigerant circuit 100 through the first heat exchange element 102, and the refrigerant in the first pipeline is connected to the charger circuit 300. The first heat exchange element 102 absorbs the heat of the coolant in the second pipeline, thereby achieving defrosting and cooling the charger assembly 301; when the coolant temperature T at the battery assembly is ≥ the set value T10, the coolant temperature in the battery circuit 200 can meet the defrosting requirement, the heating element 202 is not put into use, and the refrigerant in the first pipeline still absorbs the heat of the coolant in the second pipeline through the first heat exchange element 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 ≥ the set value T11, the coolant temperature in the battery circuit 200 is too high, and the refrigerant circuit 100 and the battery circuit 200 both stop running to avoid affecting the safety of the battery assembly due to the excessively high coolant temperature in the battery circuit 200. The fourth valve component 304 and the fifth valve component 305 are closed, and the charger circuit 300 is not connected to the battery circuit 200. At this time, the charger circuit 300 runs independently, or the charger circuit 300 stops running.

[0091] Embodiment 2

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

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

[0094] As attached Figure 8As shown, when the thermal management system is in the battery heating mode, the battery circuit 200 and the charger circuit 300 are put into use. In the battery circuit, the first pump body 201 and the heating element 202 are put into use to heat the coolant in the second pipeline. In the charger circuit 300, the fourth valve member 304 and the fifth valve member 305 are both opened, the charger circuit 300 is connected with the battery circuit 200, the second pump body 302 is working, the third heat exchange element 303 is not put into use, the second pump body 302 provides coolant power, the coolant in the third pipeline can absorb the heat at the charger assembly, so that the coolant in the third pipeline enters the second pipeline, the charger circuit 300 cooperates with the heating element 202 to achieve heating of the battery assembly, and can play a role in recovering the heat at the charger assembly 301, which is beneficial to improving the heating efficiency of the battery assembly and reducing the overall energy consumption.

[0095] Embodiment 3

[0096] In combination with the first embodiment, in this embodiment, as shown in the attached Fig. 9 As shown, the refrigerant circuit 100 further includes a charger heat exchanger 107 , and heat exchange is achieved between the refrigerant circuit 100 and the charger circuit 300 via the charger heat exchanger 107 to cool the charger assembly 301 .

[0097] As attached Fig. 9 As shown, the battery assembly includes at least one battery pack, at least one battery pack 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 through the sixth valve component 307. The charger assembly 301 includes at least one charging unit, at least one charging unit is connected in parallel, and the outlet side of the charging unit is connected to the outlet side of the battery pack through the sixth valve component 307. In the charger circuit 300, the inlet side of the charging unit is connected to the outlet side of the second pump body 302 through the seventh valve component 308, and the outlet side of the charging unit is connected to the third heat exchange element 303 through the sixth valve component 307. The sixth valve component 307 can realize the connection and disconnection of the battery circuit 200 and the charger circuit 300, and one charging unit is used to charge one battery pack.

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

[0099] Exemplarily, the sixth valve component 307 is a three-way valve.

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

[0101] Exemplarily, each battery pack includes a battery pack 203 and a battery valve component 204. The connection of the battery pack to the battery circuit 200 can be controlled by turning the battery valve component 204 on and off. When the required operating modes of different battery packs are the same, the battery packs can be directly connected to the battery circuit 200. When the required operating modes of different battery packs are different, for example, the first battery pack 200a requests a heating mode and the second battery pack 200b requests a cooling mode, then the entire thermal management system executes a cooling mode.

[0102] In the battery heating mode, when the first charging unit 301a is charging and the first battery pack 200a or the second battery pack 200b needs to be heated, the seventh valve component 308 on the inlet side of the first charging unit 301a is opened, and the sixth valve component 307 connects the outlet side of the first charging unit 301a with the coolant tank 309, and the second pump body 302 works to recover the heat of the first charging unit 301a to 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 the charger heat dissipation mode, or in the battery and charger cooling mode, when the coolant temperature T1 at the charger assembly 301 is ≥ the set value T12, the temperature of the charger assembly 301 is too high, affecting the safe operation of the system, and the forced heat dissipation by the third heat exchange element 303 and the cooling fan 306 cannot meet the cooling demand 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 exchange element 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 the charger assembly 301 from overheating and damage, or working in a high temperature environment for a long time and resulting in reduced power operation, thereby reducing energy loss.

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

[0105] When the battery circuit 200 is not connected to the charger circuit 300, the first heat exchange element 102 and the charger heat exchange element 107 are both put into use, the refrigerant circuit 100 exchanges heat with the battery circuit 200 through the first heat exchange element 102, and 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 exchange element 107, and the refrigerant in the first pipeline absorbs heat from the coolant in the third pipeline.

[0106] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A thermal management system for a battery swap station, characterized in that: include: The refrigerant circuit (100) comprises a first heat exchange element (102), A battery circuit (200), wherein heat exchange can be performed between the battery circuit (200) and the refrigerant circuit (100) via the first heat exchange element (102), and the battery circuit (200) is used to perform heat exchange with the battery assembly. and a charger circuit (300), wherein the charger circuit (300) is communicable with the battery circuit (200), and the charger circuit (300) is used to achieve heat exchange with the charger assembly (301), 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, and the working 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 working modes, the working modes can be switched.

2. The thermal management system for a battery swap station according to claim 1, characterized in that: The battery circuit (200) comprises the battery assembly, the first pump body (201) and the heating element (202) connected by a second pipeline, a cooling liquid flows in 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, and 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 thermal management system of a battery swap station according to claim 2, characterized in that: The battery assembly comprises a battery pack (203) and a battery valve component (204), wherein the battery valve component (204) is arranged between the outlet side of the battery pack (203) and the heating component (202).

4. The thermal management system for a battery swap station according to claim 2, characterized in that: The charger circuit (300) includes a charger assembly (301), a second pump body (302), a third heat exchange component (303), a fourth valve component (304) and a fifth valve component (305) connected by a third pipeline. Coolant flows in 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 exchange component (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 component (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 component (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 thermal management system for a battery swap station according to claim 1, characterized in that: The refrigerant circuit (100) further includes a charger heat exchange element (107), and heat is exchanged between the refrigerant circuit (100) and the charger circuit (300) via the charger heat exchange element (107).

6. The thermal management system for a battery swap station according to claim 5, characterized in that: The battery assembly includes at least one battery pack, at least one of the battery packs is connected in parallel, the outlet side of the battery pack is connected to the charger circuit (300) via a sixth valve component (307), the charger assembly (301) includes at least one charger, at least one of the chargers is connected in parallel, the charger circuit (300) includes a second pump body (302) and a third heat exchange component (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 component (308), and the outlet side of the charger is connected to the third heat exchange component (303) via the sixth valve component (307).

7. The thermal management system for a battery swap station 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 body (201) and the heating element (202) are in operation, the coolant in the battery circuit (200) absorbs heat from the refrigerant circuit (100) through the first heat exchange element (102), the fourth valve element (304) and the fifth valve element (305) are opened, the battery circuit (200) and the charger circuit (300) are connected, the second pump body (302) is in operation, and the third heat exchange element (303) is not put into use.

8. The thermal management system for a battery swap station according to claim 7, characterized in that: When the setting value T04≤the coolant temperature T at the battery assembly<the setting value T05, the heating element (202) is not put into use; when the coolant temperature T at the battery assembly≥the setting value T05, the refrigerant circuit (100) is not put into use, the battery circuit (200) and the charger circuit (300) are connected, and the heating element (202) is not put into use.

9. The thermal management system for a battery swap station according to claim 4, characterized in that: In the 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, and the refrigerant in the refrigerant circuit (100) absorbs heat from the battery circuit (200) through the first heat exchange element (102).

10. The thermal management system for a battery swap station according to claim 9, characterized in that: When the coolant temperature T at the battery assembly is ≥ 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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