Thermal management system for battery pack and energy storage system

Abstract

The utility model relates to the technical field of energy storage, and specifically provides a heat management system for battery pack and energy storage system, aims at solving the problem of the higher energy consumption of the existing heat management system and leading to the poor heat management effect. The heat management system of the application comprises a phase change heat pipe assembly, a liquid cooling heat dissipation assembly and an air cooling heat dissipation assembly, the phase change heat pipe assembly is encapsulated with phase change working medium, the first heat exchange end of the phase change heat pipe assembly is arranged adjacent to the battery pack and is used for heat exchange with the battery pack; the liquid cooling heat dissipation assembly is arranged to be capable of cooling the second heat exchange end through coolant, and the air cooling heat dissipation assembly is arranged to be capable of cooling the second heat exchange end through the heat dissipation structure. The application can cool the battery pack through the phase change heat pipe assembly, avoid using the liquid cooling system to directly cool the battery pack, cool the second heat exchange end through the liquid cooling heat dissipation assembly and the air cooling heat dissipation assembly, improve the working temperature range of the heat management system, improve the energy efficiency ratio, and reduce the heat management energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, specifically providing a thermal management system and energy storage system for a battery pack. Background Technology

[0002] In existing technologies, liquid cooling units are typically used for thermal management of battery packs. Specifically, a liquid cooling plate is placed at the bottom of the battery cell, and a coolant flow channel is set inside the liquid cooling plate. The liquid cooling plate is connected to the liquid cooling host through liquid cooling pipes to form a liquid cooling circuit. The coolant circulates in the liquid cooling circuit under the drive of the compressor. By controlling the temperature or flow rate of the coolant, heat exchange between the coolant and the battery cell is achieved, thereby indirectly controlling the temperature of the battery cell itself.

[0003] However, since the liquid cooling unit uses the liquid cooling host as the power source for the thermal management system to perform thermal management of the battery pack, the energy consumption is high. Furthermore, during the process of thermal management of the battery pack, condensation is prone to occur at the part of the liquid cooling plate that contacts the battery pack, which affects the safety of the battery pack and results in poor thermal management effect. Utility Model Content

[0004] The present invention aims to solve the above-mentioned technical problems to at least a certain extent, that is, to solve the problem that the existing thermal management system has poor thermal management effect due to high energy consumption and low safety.

[0005] In a first aspect, the present invention provides a thermal management system for a battery pack, the thermal management system comprising a phase change heat pipe assembly, a liquid cooling heat dissipation assembly, and an air cooling heat dissipation assembly. The phase change heat pipe assembly contains a phase change working fluid and has a first heat exchange end and a second heat exchange end. The first heat exchange end is disposed adjacent to the battery pack and is used for heat exchange with the battery pack. The liquid cooling heat dissipation assembly contains a coolant and is configured to cool the second heat exchange end by exchanging heat with the second heat exchange end through the coolant. The air cooling heat dissipation assembly has a heat dissipation structure and is configured to cool the second heat exchange end through the heat dissipation structure.

[0006] In the preferred technical solution of the above-mentioned thermal management system for battery pack, the liquid cooling heat dissipation component includes a liquid cooling plate, liquid cooling pipes, and a liquid cooling host. The liquid cooling plate is provided with a coolant channel. The liquid cooling host is connected to the coolant channel through the liquid cooling pipes to form a circulation loop for coolant flow. The liquid cooling host is configured to drive the coolant to flow in the circulation loop. The liquid cooling plate is arranged adjacent to the second heat exchange end and is capable of cooling the second heat exchange end.

[0007] In the preferred technical solution of the above-mentioned thermal management system for battery pack, the liquid cooling plate is fixedly connected to or integrally formed with the second heat exchange end; or, a thermally conductive adhesive is provided between the liquid cooling plate and the second heat exchange end, and the liquid cooling plate and the second heat exchange end are connected through the thermally conductive adhesive.

[0008] In the preferred technical solution of the above-mentioned thermal management system for battery pack, the air-cooled heat dissipation component includes a heat sink and a heat dissipation fan. The heat sink is provided with a heat dissipation structure. The heat sink is arranged adjacent to the second heat exchange end and can dissipate heat from the second heat exchange end. The heat dissipation fan is used to accelerate the airflow rate at the second heat exchange end.

[0009] In the preferred embodiment of the above-mentioned thermal management system for battery pack, the radiator is fixedly connected to or integrally formed with the second heat exchange end; or, a thermally conductive adhesive is provided between the radiator and the second heat exchange end, and the radiator and the second heat exchange end are connected through the thermally conductive adhesive.

[0010] In the preferred embodiment of the thermal management system for the battery pack described above, the liquid cooling heat dissipation component and the air cooling heat dissipation component are respectively disposed on both sides of the second heat exchange end.

[0011] In the preferred technical solution of the above-mentioned thermal management system for battery pack, the phase change heat pipe assembly can only cool the battery pack. The phase change heat pipe assembly includes a heat pipe and a phase change working fluid encapsulated in the heat pipe. The two ends of the heat pipe respectively form a first heat exchange end and a second heat exchange end. The phase change heat pipe assembly is configured to allow the liquid phase change working fluid in the second heat exchange end to flow to the first heat exchange end. The liquid cooling heat dissipation assembly and / or the air cooling heat dissipation assembly are used to cool the second heat exchange end.

[0012] In the preferred embodiment of the above-mentioned thermal management system for a battery pack, the vertical projection of the second heat exchange end is higher than the vertical projection of the first heat exchange end, so that the liquid phase change working fluid in the second heat exchange end flows to the first heat exchange end; and / or, a liquid wick is provided in the heat pipe, the liquid wick being used to drive the liquid phase change working fluid in the second heat exchange end to flow to the first heat exchange end.

[0013] In the preferred embodiment of the thermal management system for the battery pack described above, the phase change heat pipe assembly is configured to cool the battery pack when it is in a first working state and to heat the battery pack when it is in a second working state. The liquid cooling heat dissipation assembly is configured to cool the second heat exchange end when the phase change heat pipe assembly is in the first working state and to heat the second heat exchange end when the phase change heat pipe assembly is in the second working state.

[0014] In the preferred embodiment of the thermal management system for the battery pack described above, the phase change heat pipe assembly includes an evaporator, a circulation pipeline, and a phase change working fluid. Both ends of the circulation pipeline are connected to both ends of the evaporator to form a circulation loop. The phase change working fluid is encapsulated within the circulation loop. A portion of the circulation pipeline forms the first heat exchange end, and another portion forms the second heat exchange end. The evaporator is used to vaporize the phase change working fluid to drive its circulation within the circulation loop. Alternatively, the phase change heat pipe assembly includes a circulation pipeline, a wick, and a phase change working fluid encapsulated within the circulation pipeline. The beginning and end of the circulation pipeline are connected sequentially to form a circulation loop. The wick is disposed within the circulation pipeline and is used to drive the phase change working fluid to circulate within the circulation loop. A portion of the circulation pipeline forms the first heat exchange end, and another portion forms the second heat exchange end.

[0015] In the preferred embodiment of the thermal management system for the battery pack described above, the phase change heat pipe assembly further includes a first heat exchange plate and a second heat exchange plate. The first heat exchange plate is disposed adjacent to the battery pack, and the second heat exchange plate is located between the liquid cooling heat dissipation assembly and the air cooling heat dissipation assembly. The circulation pipeline includes multiple first pipe segments and multiple second pipe segments, wherein the first pipe segments and the second pipe segments are sequentially connected end-to-end. The multiple first pipe segments are disposed within the first heat exchange plate and form the first heat exchange end, and the multiple second pipe segments are disposed within the second heat exchange plate and form the second heat exchange end. Alternatively, the circulation pipeline includes connected first pipe segments and second pipe segments, wherein the first pipe segment is bent within the first heat exchange plate and forms the first heat exchange end, and the second pipe segment is bent within the second heat exchange plate and forms the second heat exchange end.

[0016] In a second aspect, the present invention also provides an energy storage system, the energy storage system comprising a battery pack and a thermal management system for the battery pack as described in any of the preceding claims.

[0017] When the above-mentioned preferred technical solution is adopted, by setting both the liquid cooling heat dissipation component and the air cooling heat dissipation component to be able to cool the second heat exchange end, when the ambient temperature is low, the second heat exchange end can be cooled only by the air cooling heat dissipation component, thereby utilizing the ambient air as a natural cold source and reducing the energy consumption of the thermal management system. When the ambient temperature is high, the second heat exchange end can also be cooled by the liquid cooling heat dissipation component, thereby increasing the operating temperature range of the thermal management system. This allows the thermal management system to achieve the best energy efficiency ratio within the ambient temperature range of -20℃ to 55℃, reducing the energy consumption of the system's thermal management.

[0018] Furthermore, by including a liquid cooling heat dissipation component, a liquid cooling pipe, and a liquid cooling host, and driving the coolant to circulate in the circulation loop, the coolant can flow through the coolant channel in the liquid cooling plate, thereby enabling the liquid cooling plate to exchange heat with the second heat exchange end, improving the cooling capacity and cooling efficiency of the liquid cooling heat dissipation component. In addition, it also facilitates the liquid cooling heat dissipation component to heat the second heat exchange end.

[0019] Furthermore, by including a heat sink and a cooling fan in the air-cooled heat dissipation component, heat can be exchanged between the heat sink and the second heat exchange end. At the same time, the cooling fan accelerates the airflow at the second heat exchange end, thereby improving the heat dissipation efficiency of the air-cooled heat dissipation component.

[0020] Furthermore, by placing the liquid cooling heat dissipation component and the air cooling heat dissipation component on both sides of the second heat exchange end, the contact area between the liquid cooling plate and the heat sink and the second heat exchange end can be larger, thereby improving the heat dissipation efficiency of the liquid cooling heat dissipation component and the air cooling heat dissipation component on the second heat exchange end, and thus improving the cooling efficiency of the battery pack.

[0021] Furthermore, the energy storage system provided by this invention, based on the aforementioned thermal management system for battery packs, possesses the beneficial effects of the aforementioned thermal management system for battery packs because it includes the aforementioned thermal management system for battery packs. The energy storage system of this invention has a wider operating temperature range, better energy efficiency ratio, and lower thermal management energy consumption. Attached Figure Description

[0022] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0023] Figure 1 This is a three-dimensional structural diagram of the battery pack and the thermal management system for the battery pack according to this utility model. Figure 1 ;

[0024] Figure 2 This is a three-dimensional structural diagram of the battery pack and the thermal management system for the battery pack according to this utility model. Figure 2 The diagram shown is a structural schematic with the cooling fan concealed.

[0025] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle;

[0026] Figure 4 This is a connection diagram of the liquid cooling heat dissipation component of this utility model;

[0027] Figure 5 This is a schematic diagram of one embodiment of the phase change heat pipe assembly of this utility model;

[0028] Figure 6 This is a schematic diagram of another embodiment of the phase change heat pipe assembly of this utility model;

[0029] Figure 7 This is a schematic diagram of another possible embodiment of the phase change heat pipe assembly of this utility model;

[0030] Figure 8 This is a schematic diagram of another embodiment of the phase change heat pipe assembly of this utility model;

[0031] Figure 9 yes Figure 8 A magnified view of a portion of point B in the middle;

[0032] Figure 10 yes Figure 8 A magnified view of a portion of point C.

[0033] List of reference numerals in the attached diagram:

[0034] 1. Battery pack; 2. Phase change heat pipe assembly; 21. First heat exchange end; 22. Second heat exchange end; 23. Heat pipe pipeline; 24. Evaporator; 251. First pipe section; 252. Second pipe section; 261. First heat spreader; 262. Second heat spreader; 27. Liquid wick; 3. Liquid cooling heat dissipation assembly; 31. Liquid cooling plate; 311. Coolant channel; 32. Liquid cooling pipeline; 33. Liquid cooling main unit; 4. Air cooling heat dissipation assembly; 41. Radiator; 411. Heat dissipation structure; 42. Cooling fan. Detailed Implementation

[0035] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0036] It should be noted that in the description of this utility model, terms such as "upper," "lower," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] In view of the problems mentioned in the background art, such as high energy consumption and low safety of existing thermal management systems, resulting in poor thermal management performance, this utility model provides a thermal management system for battery packs in the first aspect.

[0039] Specifically, such as Figures 1 to 4 As shown, the thermal management system for battery pack 1 of this utility model includes a phase change heat pipe assembly 2, a liquid cooling heat dissipation assembly 3, and an air cooling heat dissipation assembly 4. The phase change heat management assembly is encapsulated with a phase change working fluid. The phase change heat pipe assembly 2 has a first heat exchange end 21 and a second heat exchange end 22. The first heat exchange end 21 is arranged adjacent to the battery pack 1 and is used to exchange heat with the battery pack 1.

[0040] The liquid cooling heat dissipation component 3 contains a coolant and is configured to exchange heat with the second heat exchange end 22 through the coolant, thereby cooling the second heat exchange end 22. The air cooling heat dissipation component 4 has a heat dissipation structure 411 and is configured to cool the second heat exchange end 22 through the heat dissipation structure 411.

[0041] With this setup, the battery pack 1 can be thermally managed through the phase change heat pipe assembly 2, avoiding the need for a liquid cooling system to directly manage the battery pack 1, thus reducing energy consumption. At the same time, it can also prevent condensation from forming on the liquid cooling plate 31 during the battery thermal management process, which would affect the safety of the battery pack 1.

[0042] When cooling of battery pack 1 is required, the phase change working fluid in phase change heat pipe assembly 2 absorbs heat and evaporates at the first heat exchange end 21. The evaporated phase change working fluid flows to the second heat exchange end 22. Both liquid cooling heat dissipation assembly 3 and air cooling heat dissipation assembly 4 can cool the second heat exchange end 22, which helps the phase change working fluid in the second heat exchange end 22 to condense. When the ambient temperature is low, the second heat exchange end 22 can be cooled by air cooling heat dissipation assembly 4 alone, thus utilizing ambient air as a natural cold source and reducing the energy consumption of the thermal management system. When the ambient temperature is high, the second heat exchange end 22 can also be cooled by liquid cooling heat dissipation assembly 3, increasing the operating temperature range of the thermal management system. This allows the thermal management system to achieve the best energy efficiency ratio within the ambient temperature range of -20℃ to 55℃, reducing the energy consumption of the system's thermal management.

[0043] It should be noted that, in practical applications, those skilled in the art do not impose any limitations on the specific configuration type of the liquid cooling heat dissipation component 3, as long as it can dissipate heat to the second heat exchange end 22 through the coolant. For example, the liquid cooling heat dissipation component 3 can include a liquid cooling plate 31, a liquid cooling pipe 32, and a liquid cooling host 33. The liquid cooling host 33 drives the coolant to circulate within the liquid cooling plate 31 to cool the second heat exchange end 22. Alternatively, the liquid cooling heat dissipation component 3 can be configured to include a housing and a coolant disposed within the housing, so that the second heat exchange end 22 is cooled through the coolant. Such adjustments and changes to the specific configuration type of the liquid cooling heat dissipation component 3 do not deviate from the principle and scope of this utility model and should all be included within the protection scope of this utility model.

[0044] Preferably, such as Figure 1 and Figure 4 As shown, the liquid cooling heat dissipation assembly 3 includes a liquid cooling plate 31, a liquid cooling pipe 32, and a liquid cooling host 33. The liquid cooling plate 31 is provided with a coolant channel 311. The liquid cooling host 33 is connected to the liquid cooling pipe 32 in sequence to form a coolant circuit for coolant flow. The liquid cooling host 33 is configured to drive the coolant to circulate in the coolant circuit. The liquid cooling plate 31 is arranged adjacent to the second heat exchange end 22 and can cool the second heat exchange end 22.

[0045] With this configuration, the liquid cooling host 33 drives the coolant to circulate in the coolant circuit, enabling the coolant to flow through the coolant channel 311 in the liquid cooling plate 31, thereby allowing the liquid cooling plate 31 to exchange heat with the second heat exchange end 22, improving the cooling capacity and efficiency of the liquid cooling heat dissipation component 3. In addition, when it is necessary to heat the battery pack, it is also convenient for the liquid cooling heat dissipation component 3 to heat the second heat exchange end 22.

[0046] It should be noted that the liquid cooling heat dissipation component 3 is not limited to including a liquid cooling plate 31, liquid cooling pipes 32, and a liquid cooling unit 33. For example, the liquid cooling heat dissipation component 3 can also be configured to include a liquid cooling plate 31, liquid cooling pipes 32, and a circulation pump, with the circulation pump driving the coolant to circulate in the circulation loop, etc. Such adjustments and changes to the specific configuration of the liquid cooling heat dissipation component 3 do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model. Of course, preferably, the liquid cooling heat dissipation component 3 is configured to include a liquid cooling plate 31, liquid cooling pipes 32, and a liquid cooling unit 33.

[0047] It should be noted that, in practical applications, this utility model does not impose any restrictions on the specific connection method between the liquid cooling plate 31 and the second heat exchange end 22, as long as the liquid cooling plate 31 and the second heat exchange end 22 can be arranged adjacent to each other.

[0048] In one specific embodiment, the liquid cooling plate 31 and the second heat exchange end 22 are integrally formed.

[0049] In another specific embodiment, the liquid cooling plate 31 is snap-fitted to the second heat exchange end 22 or fixedly connected by fasteners.

[0050] In another possible embodiment, thermally conductive adhesive is provided between the liquid cooling plate 31 and the second heat exchange end 22, and the liquid cooling plate 31 and the second heat exchange end 22 are connected by the thermally conductive adhesive.

[0051] It should be noted that, in practical applications, those skilled in the art can configure the air-cooled heat dissipation component 4 as a heat sink 41 and a cooling fan 42, or they can configure the air-cooled heat dissipation component 4 as only a cooling fan 42, etc. Such adjustments and changes to the specific configuration type of the air-cooled heat dissipation component 4 do not deviate from the principle and scope of this utility model, and should all be included within the protection scope of this utility model.

[0052] Preferably, such as Figures 1 to 3 As shown, the air-cooled heat dissipation assembly 4 includes a heat sink 41 and a heat dissipation fan 42. The heat sink 41 is provided with a heat dissipation structure 411. The heat sink 41 is arranged adjacent to the second heat exchange end 22 and can dissipate heat from the second heat exchange end 22. The heat dissipation fan 42 is used to accelerate the air flow rate of the second heat exchange end 22.

[0053] With this setup, heat can be exchanged between the radiator 41 and the second heat exchange end 22. At the same time, the airflow speed of the second heat exchange end 22 is increased by the cooling fan 42, thereby improving the heat dissipation efficiency of the air-cooled heat dissipation component 4.

[0054] It should be noted that in practical applications, this utility model does not limit the specific number of cooling fans 42. For example, the number of cooling fans 42 can be set to only one, or the number of cooling fans 42 can be set to two, or the number of cooling fans 42 can be set to multiple, etc. Such adjustments and changes to the specific number of cooling fans 42 do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0055] Preferably, the number of cooling fans 42 is set to multiple.

[0056] With this setup, different locations of the second heat exchange end 22 can effectively exchange heat with the surrounding environment, thereby improving heat exchange uniformity and further enhancing the thermal management effect of the battery pack 1.

[0057] For example, such as Figure 1 As shown, there are four cooling fans 42.

[0058] It should be noted that, in practical applications, this utility model does not impose any limitations on the specific structural type of the heat dissipation structure 411 on the radiator 41. For example, the heat dissipation structure 411 can be set as a flat fin, or it can be set as a wavy fin, or it can be set as any other possible structural type, as long as it can dissipate heat to the second heat exchange end 22, etc. Such flexible adjustments and changes do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0059] Preferably, such as Figure 3 As shown, the heat dissipation structure 411 has flat fins.

[0060] It should be noted that, in practical applications, this utility model does not impose any restrictions on the specific connection method between the radiator 41 and the second heat exchange end 22, as long as the radiator 41 and the second heat exchange end 22 are arranged adjacent to each other and can dissipate heat from the second heat exchange end 22.

[0061] In one specific embodiment, the radiator 41 and the second heat exchange end 22 are integrally formed.

[0062] In another specific embodiment, the radiator 41 is snap-fitted to the second heat exchange end 22 or fixedly connected by fasteners.

[0063] In another possible embodiment, thermally conductive adhesive is provided between the radiator 41 and the second heat exchange end 22, and the radiator 41 and the second heat exchange end 22 are connected by the thermally conductive adhesive.

[0064] It should be noted that, in practical applications, those skilled in the art can arrange both the liquid-cooled heat dissipation component 3 and the air-cooled heat dissipation component 4 on one side of the second heat exchange end 22, or they can arrange the liquid-cooled heat dissipation component 3 and the air-cooled heat dissipation component 4 on both sides of the second heat exchange end 22, etc. Such adjustments and changes to the specific arrangement positions of the liquid-cooled heat dissipation component 3, the air-cooled heat dissipation component 4 and the second heat exchange end 22 do not deviate from the principle and scope of this utility model, and should all be included within the protection scope of this utility model.

[0065] Preferably, such as Figure 1 As shown, the liquid-cooled heat dissipation component 3 and the air-cooled heat dissipation component 4 are respectively disposed on both sides of the second heat exchange end 22.

[0066] More preferably, such as Figure 1 and Figure 2 As shown, the liquid cooling plate 31 and the radiator 41 are respectively disposed on both sides of the second heat exchange end 22.

[0067] With this configuration, the contact area between the liquid cooling plate 31 and the heat sink 41 and the second heat exchange end 22 can be larger, thereby improving the heat dissipation efficiency of the liquid cooling heat dissipation component 3 and the air cooling heat dissipation component 4 on the second heat exchange end 22, and thus improving the cooling efficiency of the battery pack 1.

[0068] Preferably, the thermal management system of this utility model further includes a temperature detection component, which is used to detect the ambient temperature of the environment where the battery pack 1 is located. The liquid cooling heat dissipation component 3 and the air cooling heat dissipation component 4 are both connected to the temperature detection component in order to selectively adjust the opening and closing of the liquid cooling heat dissipation component 3 and the air cooling heat dissipation component 4 according to the detection data of the temperature detection component.

[0069] With this setup, the liquid cooling component 3 or the air cooling component 4 can be selected to cool the second heat exchange end 22 based on the ambient temperature of the battery pack 1. On the one hand, when the ambient temperature is too high, the air cooling component 4 cannot effectively dissipate the heat from the second heat exchange end 22 to the surrounding environment. In this case, activating the liquid cooling component 3 can more effectively cool the second heat exchange end 22, thereby enabling the phase change heat pipe component 2 to cool the battery pack 1 more effectively. On the other hand, when the ambient temperature is too low, the air cooling component 4 can dissipate the heat from the second heat exchange end 22 to the surrounding environment without activating the liquid cooling component 3, thus reducing energy consumption.

[0070] Specifically, the thermal management system also includes a controller, and both the liquid cooling heat dissipation component 3 and the cold air heat dissipation component 4 are connected to the temperature detection component through the controller.

[0071] It should be noted that, in practical applications, those skilled in the art can place the liquid cooling heat dissipation component 3 on the side of the second heat exchange end 22 closer to the battery pack 1 and place the air cooling heat dissipation component 4 on the side of the second heat exchange end 22 away from the battery pack 1, or they can place the liquid cooling heat dissipation component 3 on the side of the second heat exchange end 22 away from the battery pack 1 and place the air cooling heat dissipation component 4 on the side of the second heat exchange end 22 closer to the battery pack 1, and so on. Such adjustments and changes to the relative positions of the liquid cooling heat dissipation component 3 and the air cooling heat dissipation component 4 do not deviate from the principle and scope of this utility model and should all be included within the protection scope of this utility model.

[0072] For example, such as Figure 1 As shown, the liquid cooling heat dissipation component 3 is set on the side of the second heat exchange end 22 away from the battery pack 1, and the air cooling heat dissipation component 4 is set on the side of the second heat exchange end 22 close to the battery pack 1.

[0073] It should be noted that, in practical applications, those skilled in the art can configure the air-cooled heat dissipation component 4 and the liquid-cooled heat dissipation component 3 to cool the second heat exchange end 22 simultaneously, or they can configure the air-cooled heat dissipation component 4 and the liquid-cooled heat dissipation component 3 to cool the second heat exchange end 22 separately, etc. Such flexible adjustments and changes do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0074] In one embodiment, the air-cooled heat dissipation component 4 and the liquid-cooled heat dissipation component 3 are configured to simultaneously cool the second heat exchange end 22.

[0075] In another specific embodiment, the air-cooled heat dissipation component 4 or the liquid-cooled heat dissipation component 3 is used to cool the second heat exchange end 22.

[0076] It should be noted that, in practical applications, those skilled in the art can configure the phase change heat pipe assembly 2 to only cool the battery pack 1, and correspondingly, configure the liquid cooling heat dissipation assembly 3 to dissipate heat to the second heat exchange end 22. Alternatively, the phase change heat pipe assembly 2 can be configured to only heat the battery pack 1. Or, the phase change heat pipe assembly 2 can be configured to cool the battery pack 1 when it is in the first working state and to heat the battery pack 1 when it is in the second working state, and correspondingly, configure the liquid cooling heat dissipation assembly 3 to dissipate heat to the second heat exchange end 22 when the phase change heat pipe assembly 2 is in the first working state and to heat the second heat exchange end 22 when the phase change heat pipe assembly 2 is in the second working state, and so on. Such adjustments and changes to the specific configuration of the phase change heat pipe assembly 2 do not deviate from the principle and scope of this utility model and should all be included within the protection scope of this utility model.

[0077] The phase change heat pipe assembly 2 of this utility model will be described below in conjunction with the following two scenarios.

[0078] Scenario 1:

[0079] like Figure 5 As shown, the phase change heat pipe assembly 2 can only cool the battery pack 1. The phase change heat pipe assembly 2 includes a heat pipe 23 and a phase change working fluid encapsulated in the heat pipe 23. The two ends of the heat pipe 23 form a first heat exchange end 21 and a second heat exchange end 22, respectively. The phase change heat pipe assembly 2 is configured to allow the liquid phase change working fluid in the second heat exchange end 22 to flow to the first heat exchange end 21. The phase change heat pipe assembly 2 is used to cool the second heat exchange end 22.

[0080] It should be noted that this utility model does not limit the specific arrangement of the heat pipe 23. For example, the heat pipe 23 can be set as a heat exchange pipe, or it can be set as including a shell and multiple cavities formed in the shell for the flow of phase change working fluid, etc. Such adjustments and changes to the specific arrangement of the heat pipe 23 do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0081] It should also be noted that this utility model does not limit the specific implementation of the liquid phase change working medium in the second heat exchange end 22 to the first heat exchange end 21 in the phase change heat pipe assembly 2, as long as the liquid phase change working medium in the second heat exchange end 22 can flow to the first heat exchange end 21.

[0082] In one specific embodiment, such as Figure 5 As shown, the projection of the second heat exchange end 22 in the vertical direction is higher than the projection of the first heat exchange end 21 in the vertical direction, so that the liquid phase change working fluid in the second heat exchange end 22 flows to the first heat exchange end 21.

[0083] Specifically, the phase change working fluid in the first heat exchange end 21 absorbs heat from the battery pack 1 and vaporizes. The gaseous phase change working fluid flows to the second heat exchange end 22. Since the second heat exchange end 22 is adjacent to the liquid cooling heat dissipation component 3 and the air cooling heat dissipation component 4, the liquid cooling heat dissipation component 3 and / or the air cooling heat dissipation component 4 can absorb heat from the second heat exchange end 22, causing the gaseous phase change working fluid in the second heat exchange end 22 to liquefy. Since the height of the second heat exchange end 22 is higher than that of the first heat exchange end 21, the liquefied phase change working fluid can flow back to the first heat exchange end 21, thereby continuously cooling the battery pack 1.

[0084] It should be noted that, in practical applications, those skilled in the art do not impose any limitations on the specific arrangement of the first heat exchange end 21 and the second heat exchange end 22, as long as the height of the second heat exchange end 22 is higher than that of the first heat exchange end 21 and the liquid phase change working fluid of the second heat exchange end 22 can flow to the first heat exchange end 21. For example, the heat pipe 23 can be set in an L-shape, or the number of second heat exchange ends 22 can be set to two, with both second heat exchange ends 22 being higher than the first heat exchange end 21, i.e., the heat pipe 23 is in a "U" shape, etc. Such adjustments and changes to the specific arrangement of the first heat exchange end 21 and the second heat exchange end 22 do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0085] Preferably, such as Figure 5 As shown, the heat pipe is L-shaped.

[0086] In another specific embodiment, a liquid wick 27 is provided inside the heat pipe 23. The liquid wick 27 is used to drive the liquid phase change working fluid of the second heat exchange end 22 to flow to the first heat exchange end 21.

[0087] In another possible embodiment, the vertical projection of the second heat exchange end 22 is higher than the vertical projection of the first heat exchange end 21, so that the liquid phase change working fluid in the second heat exchange end 22 flows to the first heat exchange end 21, and a liquid suction core is provided in the heat pipe 23, which is used to drive the liquid phase change working fluid in the second heat exchange end 22 to flow to the first heat exchange end 21.

[0088] Scenario 2:

[0089] Preferably, such as Figures 6 to 8 As shown, the phase change heat pipe assembly 2 is configured to cool the battery pack 1 when it is in the first working state and to heat the battery pack 1 when it is in the second working state. The liquid cooling heat dissipation assembly 3 is configured to dissipate heat from the second heat exchange end 22 when the phase change heat pipe assembly 2 is in the first working state and to heat the second heat exchange end 22 when the phase change heat pipe assembly 2 is in the second working state.

[0090] With this configuration, on the one hand, the phase change heat pipe assembly 2 can cool the battery pack 1, reducing the risk of thermal runaway due to excessive temperature of the battery pack 1; on the other hand, it can also heat the battery pack 1, preventing the battery from operating normally due to excessively low temperature of the battery pack 1. In addition, when the phase change heat pipe assembly 2 cools the battery pack 1, the liquid cooling heat dissipation assembly 3 and / or the air cooling heat dissipation assembly 4 can dissipate heat from the second heat exchange end 22, thereby improving the cooling efficiency of the phase change heat pipe assembly 2 on the battery pack 1. When the phase change heat pipe assembly 2 heats the battery pack 1, the liquid cooling heat dissipation assembly 3 and / or the air cooling heat dissipation assembly 4 can also heat the second heat exchange end 22, thereby accelerating the heating efficiency of the phase change heat pipe assembly 2 on the battery pack 1.

[0091] Specifically, when it is necessary to cool down the battery pack 1, the liquid phase change working fluid in the first heat exchange end 21 absorbs the heat generated by the battery pack 1 and vaporizes. The gaseous phase change working fluid flows to the second heat exchange end 22. The liquid cooling heat dissipation component 3 and / or the air cooling heat dissipation component 4 can dissipate heat from the second heat exchange end 22, thereby accelerating the condensation of the gaseous phase change working fluid in the second heat exchange end 22. This further accelerates the flow of the condensed liquid working fluid to the battery pack 1 and cools down the battery pack 1, thus improving the cooling efficiency of the battery pack 1.

[0092] When the battery pack 1 needs to be heated, the liquid cooling heat dissipation component 3 / or the air cooling heat dissipation component 4 can heat the liquid working medium in the second heat exchange end 22 and cause the liquid working medium to vaporize. The vaporized liquid working medium flows to the first heat exchange end 21 and condenses in the first heat exchange end 21, releasing a large amount of heat to heat the battery pack 1. Therefore, the heat exchange between the liquid cooling heat dissipation component 3 / or the air cooling heat dissipation component 4 and the second heat exchange end 22 can improve the heating efficiency of the battery pack 1.

[0093] It should be noted that, in practical applications, this utility model does not impose any restrictions on the specific configuration type of the phase change heat pipe assembly 2, as long as it can cool the battery pack 1 when it is in the first working state and heat the battery pack 1 when it is in the second working state.

[0094] The phase change heat pipe assembly in scenario 2 is described below with reference to the following two embodiments.

[0095] Example 1:

[0096] Preferably, such as Figure 6 and Figure 7 As shown, the phase change heat pipe assembly 2 of this utility model includes an evaporator 24, a circulation pipeline, and a phase change working fluid. The two ends of the circulation pipeline are respectively connected to the two ends of the evaporator 24 to form a circulation loop. The phase change working fluid is encapsulated in the circulation loop. A part of the circulation pipeline forms a first heat exchange end 21, and the other part of the circulation pipeline forms a second heat exchange end 22. The evaporator 24 is used to vaporize the phase change working fluid to drive the phase change working fluid to circulate in the circulation loop.

[0097] It should be noted that, in practical applications, those skilled in the art do not impose any limitations on the specific height of the first heat exchange end 21 and the second heat exchange end 22. For example, the vertical projection of the first heat exchange end 21 can be set higher than the vertical projection of the second heat exchange end 22, or the vertical projection of the first heat exchange end 21 can be set lower than the vertical projection of the second heat exchange end 22, or the first heat exchange end 21 and the second heat exchange end 22 can be set at the same height, etc. Such adjustments and changes to the specific height of the first heat exchange end 21 and the second heat exchange end 22 do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0098] Preferably, such as Figure 6 and Figure 7 As shown, the projection of the first heat exchange end 21 in the vertical direction is set to be lower than the projection of the second heat exchange end 22 in the vertical direction.

[0099] It should also be noted that, in practical applications, this utility model does not impose any restrictions on the specific laying method of the circulation pipeline.

[0100] In one specific embodiment, such as Figure 6 As shown, the phase change heat pipe assembly 2 also includes a first heat exchange plate 261 and a second heat exchange plate 262. The first heat exchange plate 261 is arranged adjacent to the battery pack 1, and the second heat exchange plate 262 is arranged with the liquid cooling heat dissipation assembly 3 and the air cooling heat dissipation assembly 4. The circulation pipeline includes multiple first pipe segments 251 and multiple second pipe segments 252, wherein the first pipe segments 251 and the second pipe segments 252 are connected end to end in sequence. The multiple first pipe segments 251 are arranged in the first heat exchange plate 261 and form a first heat exchange end 21, and the multiple second pipe segments 252 are arranged in the second heat exchange plate 262 and form a second heat exchange end 22.

[0101] In another specific embodiment, such as Figure 7 As shown, the phase change heat pipe assembly 2 also includes a first heat exchange plate 261 and a second heat exchange plate 262. The first heat exchange plate 261 is disposed adjacent to the battery pack 1, and the second heat exchange plate 262 is disposed adjacent to the liquid cooling heat dissipation assembly 3 and the air cooling heat dissipation assembly 4. The circulation pipeline includes a first pipe section 251 and a second pipe section 252 connected to each other. The first pipe section 251 is bent inside the first heat exchange plate 261 and forms a first heat exchange end 21. The second pipe section 252 is bent inside the second heat exchange plate 262 and forms a second heat exchange end 22.

[0102] By setting the first pipe segment 251 inside the first heat exchange plate 261, the heat exchange area between the first pipe segment 251 and the battery pack 1 can be increased, thereby improving the heat exchange efficiency between the first heat exchange end 21 and the battery pack 1. At the same time, by setting the second pipe segment 252 inside the second heat exchange plate 262, the heat exchange area between the second pipe segment 252 and the liquid cooling heat dissipation component 3 can also be increased, thereby improving the heat exchange efficiency between the second heat exchange end 22 and the liquid cooling heat dissipation component 3. Furthermore, the arrangement of the first heat exchange plate 261 and the second heat exchange plate 262 can also improve the temperature uniformity of the first heat exchange end 21 and the second heat exchange end 22, further improving the thermal management effect of the thermal management system.

[0103] It should be noted that, in practical applications, those skilled in the art do not impose any limitations on the bending configuration of the first pipe segment 251 and / or the second pipe segment 252. For example, both the first pipe segment 251 and / or the second pipe segment 252 can be configured as a loop bend, or they can be configured as a U-shaped bend, or they can be configured as a reciprocating bend, etc. Such flexible adjustments and changes do not deviate from the principles and scope of this utility model and should be included within the protection scope of this utility model.

[0104] Preferably, both the first pipe segment 251 and the second pipe segment 252 are configured to be reciprocated and bent so that the first pipe segment 251 and the second pipe segment 252 form a serpentine pipe structure.

[0105] It should be noted that although this embodiment describes the specific setting of the circulation pipeline in the above two situations, it is not restrictive. The circulation pipeline can also be set up in any other possible laying method, etc. Such flexible adjustments and changes do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0106] Example 2:

[0107] like Figures 8 to 10 As shown, the phase change heat pipe assembly 2 includes a circulation pipe, a liquid wick 27 disposed in the circulation pipe, and a phase change working fluid encapsulated in the circulation pipe. The beginning and end of the circulation pipe are connected in sequence to form a circulation loop. The liquid wick 27 is configured to drive the phase change working fluid to circulate in the circulation loop. At least a part of the circulation pipe forms a first heat exchange end 21, and another part of the circulation pipe forms a second heat exchange end 22.

[0108] With this setup, the phase change working fluid can be driven to circulate in the circulation loop by the liquid wick 27 in the circulation pipeline, eliminating the need for an evaporator 24. This simplifies the structure of the phase change heat pipe assembly 2 and saves installation space.

[0109] It should be noted that, in practical applications, this utility model does not impose any restrictions on the specific laying method of the circulation pipeline.

[0110] In one specific embodiment, such as Figure 8 As shown, the phase change heat pipe assembly 2 also includes a first heat exchange plate 261 and a second heat exchange plate 262. The first heat exchange plate 261 is arranged adjacent to the battery pack 1, and the second heat exchange plate 262 is arranged adjacent to the liquid cooling heat dissipation assembly 3 and the air cooling heat dissipation assembly 4. The circulation pipeline includes multiple first pipe segments 251 and multiple second pipe segments 252, wherein the first pipe segments 251 and the second pipe segments 252 are connected end to end in sequence. The multiple first pipe segments 251 are arranged in the first heat exchange plate 261 and form a first heat exchange end 21, and the multiple second pipe segments 252 are arranged in the second heat exchange plate 262 and form a second heat exchange end 22.

[0111] In another specific embodiment, the phase change heat pipe assembly 2 further includes a first heat spreader 261 and a second heat spreader 262. The first heat spreader 261 is disposed adjacent to the battery pack 1, and the second heat spreader 262 is disposed adjacent to the liquid cooling heat dissipation assembly 3 and the air cooling heat dissipation assembly 4. The circulation pipeline includes a first pipe segment 251 and a second pipe segment 252 (not shown in the figure) connected together. The first pipe segment 251 is bent inside the first heat spreader 261 and forms a first heat exchange end 21. The second pipe segment 252 is bent inside the second heat spreader 262 and forms a second heat exchange end 22. The second pipe segment 252 is bent below the battery pack 1 and forms the first heat exchange end 21. The second pipe segment 252 is bent on the heat exchange surface of the liquid cooling heat dissipation assembly 3 and forms the second heat exchange end 22.

[0112] It should be noted that in practical applications, this utility model does not limit the specific location of the suction core 27. For example, the suction core 27 can be set in the entire circulation pipeline, or the suction core 27 can be set only at the end of the first pipe section 251 and the second pipe section 252, etc. Such adjustments and changes to the specific location of the suction core 27 do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0113] Preferably, such as Figures 8 to 10 As shown, the suction core 27 is located at the end of the first tube section 251 and the second tube section 252.

[0114] Specifically, the suction core 27 is located at one end of the first tube section 251 and the second tube section 252 that are far apart from each other.

[0115] It should be noted that this utility model does not impose any limitations on the specific structure of the liquid wick 27. For example, the liquid wick 27 can be configured as a porous structure formed by sintering metal powder (such as copper, aluminum, nickel) or ceramic powder (such as alumina) through a sintering process (pressurizing at high temperature to fuse powder particles). Alternatively, the liquid wick 27 can be configured as a structure of "mesh holes + sintered pores" formed by stacking and sintering multiple layers of metal mesh (such as copper mesh). Alternatively, the liquid wick 27 can be configured as a nanostructure, for example, by forming a nanoscale porous structure (such as nanopore array, nanogroove) on the inner wall of the metal through processes such as anodizing and chemical etching. In this way, no limitations are imposed on the specific structure of the liquid wick 27, as long as it can transport the liquid phase change working fluid at the condensation end to the evaporation end.

[0116] It should also be noted that although the present invention describes the phase change heat pipe assembly 2 in scenario 2 of the present invention using the above two embodiments, this is not limiting. For example, the phase change heat pipe assembly 2 can also include a heat pipe 23, a liquid absorber disposed in the heat pipe 23, and a phase change working fluid encapsulated in the heat pipe 23. The two ends of the heat pipe 23 respectively form a first heat exchange end 21 and a second heat exchange end 22. One of the first heat exchange end 21 and the second heat exchange end 22 is a condensation end, and the other of the first heat exchange end 21 and the second heat exchange end 22 is an evaporation end. The liquid absorber 27 is configured to allow the gaseous phase change working fluid at the evaporation end to flow to the condensation end and the liquid phase change working fluid at the condensation end to flow to the evaporation end, etc. Such flexible adjustments and changes do not deviate from the principle and scope of the present invention and should all be included within the protection scope of the present invention.

[0117] It should also be noted that this utility model does not limit the specific type of phase change working fluid filled in the phase change heat pipe. For example, the phase change working fluid can be water, methanol, ethanol, liquid ammonia, acetone, fluorinated hydrocarbons, alkanes, or a mixture of any two of the above, etc. Such adjustments and changes to the specific type of phase change working fluid do not deviate from the principle and scope of this utility model and should be included within the protection scope of this utility model.

[0118] For example, the phase change working fluid is water.

[0119] In a second aspect, the present invention also provides an energy storage system, which includes a battery pack 1 and a thermal management system for the battery pack 1 as described in any of the above claims.

[0120] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A thermal management system for a battery pack (1), characterized in that, The thermal management system includes a phase change heat pipe assembly (2), a liquid cooling heat dissipation assembly (3), and an air cooling heat dissipation assembly (4). The phase change heat pipe assembly (2) contains a phase change working fluid. The phase change heat pipe assembly (2) has a first heat exchange end (21) and a second heat exchange end (22). The first heat exchange end (21) is arranged adjacent to the battery pack (1) and is used to exchange heat with the battery pack (1). The liquid cooling heat dissipation component (3) is provided with coolant and is configured to exchange heat with the second heat exchange end (22) through the coolant, thereby cooling the second heat exchange end (22). The air cooling heat dissipation component (4) has a heat dissipation structure (411) and is configured to cool the second heat exchange end (22) through the heat dissipation structure (411).

2. The thermal management system for a battery pack (1) according to claim 1, characterized in that, The liquid cooling heat dissipation assembly (3) includes a liquid cooling plate (31), liquid cooling pipes (32), and a liquid cooling unit (33). The liquid cooling plate (31) has a coolant channel (311). The liquid cooling unit (33) is connected to the coolant channel (311) through the liquid cooling pipes (32) to form a coolant circuit for coolant flow. The liquid cooling unit (33) is configured to drive the coolant to flow in the coolant circuit. The liquid cooling plate (31) is arranged adjacent to the second heat exchange end (22) and can cool the second heat exchange end (22).

3. The thermal management system for the battery pack (1) according to claim 2, characterized in that, The liquid cooling plate (31) is fixedly connected to the second heat exchange end (22) or integrally formed; Alternatively, a thermally conductive adhesive is provided between the liquid cooling plate (31) and the second heat exchange end (22), and the liquid cooling plate (31) and the second heat exchange end (22) are connected by the thermally conductive adhesive.

4. The thermal management system for a battery pack (1) according to claim 1, characterized in that, The air-cooled heat dissipation component (4) includes a heat sink (41) and a heat dissipation fan (42). The heat sink (41) is provided with a heat dissipation structure (411). The heat sink (41) is arranged adjacent to the second heat exchange end (22) and can dissipate heat from the second heat exchange end (22). The heat dissipation fan (42) is used to accelerate the air flow rate of the second heat exchange end (22).

5. The thermal management system for a battery pack (1) according to claim 4, characterized in that, The radiator (41) is fixedly connected to the second heat exchange end (22) or integrally formed; Alternatively, a thermally conductive adhesive may be provided between the radiator (41) and the second heat exchange end (22), and the radiator (41) and the second heat exchange end (22) may be connected by the thermally conductive adhesive.

6. The thermal management system for a battery pack (1) according to any one of claims 1 to 5, characterized in that, The liquid cooling heat dissipation component (3) and the air cooling heat dissipation component (4) are respectively disposed on both sides of the second heat exchange end (22).

7. The thermal management system for a battery pack (1) according to claim 1, characterized in that, The phase change heat pipe assembly (2) can only cool the battery pack (1). The phase change heat pipe assembly (2) includes a heat pipe (23) and a phase change working fluid encapsulated in the heat pipe (23). The two ends of the heat pipe (23) form the first heat exchange end (21) and the second heat exchange end (22), respectively. The phase change heat pipe assembly (2) is configured to allow the liquid phase change working fluid in the second heat exchange end (22) to flow to the first heat exchange end (21). The liquid cooling heat dissipation assembly (3) and / or the air cooling heat dissipation assembly (4) are used to cool the second heat exchange end (22).

8. The thermal management system for a battery pack (1) according to claim 7, characterized in that, The projection of the second heat exchange end (22) in the vertical direction is higher than the projection of the first heat exchange end (21) in the vertical direction, so that the liquid phase change working fluid in the second heat exchange end (22) flows to the first heat exchange end (21); And / or, a liquid wick (27) is provided in the heat pipe (23), and the liquid wick (27) is used to drive the liquid phase change working fluid in the second heat exchange end (22) to flow to the first heat exchange end (21).

9. The thermal management system for a battery pack (1) according to claim 1, characterized in that, The phase change heat pipe assembly (2) is configured to cool the battery pack (1) when it is in a first working state and to heat the battery pack (1) when it is in a second working state. The liquid cooling heat dissipation assembly (3) is configured to cool the second heat exchange end (22) when the phase change heat pipe assembly (2) is in the first working state and to heat the second heat exchange end (22) when the phase change heat pipe assembly (2) is in the second working state.

10. The thermal management system for a battery pack (1) according to claim 9, characterized in that, The phase change heat pipe assembly (2) includes an evaporator (24), a circulation pipeline, and a phase change working fluid. The two ends of the circulation pipeline are respectively connected to the two ends of the evaporator (24) to form a circulation loop. The phase change working fluid is encapsulated in the circulation loop. A part of the circulation pipeline forms the first heat exchange end (21), and the other part of the circulation pipeline forms the second heat exchange end (22). The evaporator (24) is used to vaporize the phase change working fluid to drive the phase change working fluid to circulate in the circulation loop. Alternatively, the phase change heat pipe assembly (2) includes a circulation pipe, a wick (27), and a phase change working fluid encapsulated in the circulation pipe. The beginning and end of the circulation pipe are connected in sequence to form a circulation loop. The wick (27) is disposed in the circulation pipe and is used to drive the phase change working fluid to circulate in the circulation loop. A portion of the circulation pipe forms the first heat exchange end (21), and another portion of the circulation pipe forms the second heat exchange end (22).

11. The thermal management system for a battery pack (1) according to claim 10, characterized in that, The phase change heat pipe assembly (2) further includes a first heat spreader (261) and a second heat spreader (262). The first heat spreader (261) is disposed adjacent to the battery pack (1), and the second heat spreader (262) is located between the liquid cooling heat dissipation assembly (3) and the air cooling heat dissipation assembly (4). The circulation pipeline includes multiple first pipe sections (251) and multiple second pipe sections (252), wherein the first pipe sections (251) and the second pipe sections (252) are connected end to end in sequence, the multiple first pipe sections (251) are arranged in the first heat exchange plate (261) and form the first heat exchange end (21), and the multiple second pipe sections (252) are arranged in the second heat exchange plate (262) and form the second heat exchange end (22); Alternatively, the circulation pipeline includes a first pipe section (251) and a second pipe section (252) connected to each other, wherein the first pipe section (251) is bent within the first heat exchange plate (261) and forms the first heat exchange end (21), and the second pipe section (252) is bent within the second heat exchange plate (262) and forms the second heat exchange end (22).

12. An energy storage system, characterized in that, The energy storage system includes a battery pack (1) and a thermal management system for the battery pack (1) according to any one of claims 1 to 11.

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