Liquid cooling assembly and battery pack

Abstract

The utility model provides a liquid cooling assembly and a battery pack, and belongs to the technical field of battery packs, the liquid cooling assembly comprises a liquid cooling plate, a first joint, a second joint and a spraying assembly, the liquid cooling plate is internally provided with a cooling channel, and the cooling channel is provided with a liquid inlet and a liquid outlet; the first joint is connected with the liquid inlet, and the second joint is connected with the liquid outlet; the spraying assembly is arranged on the first connector and / or the second connector, the spraying assembly comprises a fire-fighting detection part and a nozzle, the fire-fighting detection part is electrically connected with the nozzle, and the nozzle is connected with the first connector and / or the second connector. When the fire-fighting detection piece detects the thermal runaway high temperature in the box body or the smoke and other abnormalities in the box body, the spraying function is started, so that the cooling liquid is sprayed into the box body in a vaporific manner, the thermal runaway is inhibited, the cooling liquid in the liquid cooling plate is utilized, the structure is compact, and the safety is further improved.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, specifically to a liquid cooling component and a battery pack. Background Technology

[0002] As electric vehicle users demand increasingly higher driving range and energy from battery packs, the number of battery cells in the packs is increasing. At the same time, users are also demanding faster charging times, which leads to greater challenges in battery thermal management and thermal safety.

[0003] Currently, liquid cooling plates are usually installed inside the battery pack to cool the cells. However, there are still cases where battery abnormalities lead to overheating and thermal runaway. At present, fire suppression systems are generally installed on the outside of the battery pack, which misses the opportunity to control fires inside the battery pack in the early stages, resulting in poor safety. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology, which generally sets up a fire protection system on the outside of the battery pack, thus missing the early fire control inside the battery pack and resulting in poor safety, thereby providing a liquid cooling component and battery pack.

[0005] To solve the above-mentioned technical problems, this utility model provides a liquid cooling component, comprising:

[0006] A liquid-cooled plate having internal cooling channels, wherein the cooling channels have liquid inlets and liquid outlets;

[0007] A first connector and a second connector, wherein the first connector is connected to the liquid inlet and the second connector is connected to the liquid outlet;

[0008] A spray assembly is disposed on the first connector and / or the second connector. The spray assembly includes a fire detection element and a nozzle. The fire detection element is electrically connected to the nozzle, and the nozzle is connected to the first connector and / or the second connector.

[0009] Optionally, the spray assembly is disposed on the first connector, the first connector comprising:

[0010] The first body has a first liquid accumulation chamber, the nozzle is connected to the first liquid accumulation chamber, and the fire detection device is disposed on the first body;

[0011] Both the first connector and the liquid inlet are connected and disposed on the first body. The first connector is connected to the liquid inlet, and the liquid inlet is used to connect to an external liquid cooling system.

[0012] And / or, the second connector includes:

[0013] The second body has a second fluid accumulation chamber;

[0014] The second connector and the liquid outlet are both connected to the second body. The second connector is connected to the liquid outlet, and the liquid outlet is used to connect to an external liquid cooling system.

[0015] Optionally, the liquid cooling plate includes a first side plate, a second side plate, and a third side plate connected in sequence, wherein the first side plate, the second side plate, and the third side plate surround a receiving cavity for placing a battery pack;

[0016] The first side plate, the second side plate, and the third side plate each have at least one set of connecting cavities inside, and multiple sets of connecting cavities are connected in sequence to form the cooling channel.

[0017] Optionally, a set of communicating cavities is provided inside the first side plate, the second side plate and the third side plate, and the liquid inlet and the liquid outlet are respectively provided on the first side plate and the third side plate;

[0018] Alternatively, the first side plate, the second side plate, and the third side plate may each have two sets of communicating cavities inside, with the liquid inlet and the liquid outlet simultaneously located on either the first side plate or the third side plate.

[0019] Optionally, the cooling channel is provided with multiple fins.

[0020] Optionally, there are multiple liquid cooling plates, and the liquid inlets and outlets of the multiple liquid cooling plates are all located on the same side of the housing;

[0021] The liquid inlets of the plurality of liquid cooling plates are all connected to the first connector, and the liquid outlets of the plurality of liquid cooling plates are all connected to the second connector.

[0022] Optionally, the first connector and the liquid inlet, and the second connector and the liquid outlet are both connected by nylon tubing.

[0023] Optionally, it further includes: a flow detection element disposed on the first connector, wherein the detection end of the flow detection element is located inside the first connector.

[0024] And / or, the fire detection device is one or more of temperature detection devices and smoke detection devices.

[0025] This utility model also provides a battery pack, including a housing, a battery pack, and a liquid cooling component as described in any of the above. The battery pack is disposed in the housing; the liquid cooling component is disposed in the housing and cools the battery pack.

[0026] Optionally, the side wall of the housing is provided with a first through hole and a second through hole, the liquid inlet of the first connector is disposed in the first through hole, and the liquid outlet of the second through hole is disposed in the second through hole.

[0027] The technical solution of this utility model has the following advantages:

[0028] The liquid cooling assembly provided by this utility model includes a liquid cooling plate, a first connector, a second connector, and a spray assembly. The liquid cooling plate has a cooling channel inside. Coolant is fed into the liquid cooling plate through the first connector and the cooled liquid after heat exchange is sent out through the second connector. The spray assembly is disposed on the first connector and / or the second connector. The spray assembly includes a fire detection element and a nozzle. The fire detection element and the nozzle are electrically connected. The nozzle is connected to the first connector and / or the second connector.

[0029] By installing the spray assembly on the first and / or second connectors, if the fire detection device detects abnormalities such as high temperature during thermal runaway inside the enclosure or smoke inside the enclosure, the nozzles are opened to activate the spray function, allowing the coolant to be sprayed into the enclosure in a mist, thereby suppressing thermal runaway. By combining the spray assembly and the connectors, the coolant is used effectively to control early fire in the battery pack, improving safety. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of one embodiment of the liquid cooling assembly provided in Embodiment 1 of this utility model;

[0032] Figure 2 for Figure 1 Side view of the liquid cooling plate;

[0033] Figure 3 for Figure 1 Schematic diagram of the structure of the first joint;

[0034] Figure 4 for Figure 3 A schematic diagram of the cross-sectional structure;

[0035] Figure 5 for Figure 1 Schematic diagram of the structure of the second connector;

[0036] Figure 6This is a schematic diagram of another embodiment of the liquid cooling component in this utility model;

[0037] Figure 7 for Figure 6 Schematic diagram of the flow direction of coolant inside the liquid cooling component;

[0038] Figure 8 This is a schematic diagram of one embodiment of the battery pack provided in Embodiment 2 of this utility model;

[0039] Figure 9 for Figure 8 A schematic diagram of the explosion structure.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Liquid cooling plate; 2. Cooling channel; 3. Liquid inlet; 4. Liquid outlet; 5. First connector; 6. Second connector; 7. Spray assembly; 8. First body; 9. First liquid accumulation chamber; 10. First connector; 11. Liquid inlet head; 12. Second body; 13. Second through hole; 14. Second connector head; 15. Liquid outlet head; 16. First side plate; 17. Second side plate; 18. Third side plate; 19. Battery pack; 20. Receiving cavity; 21. Fin; 22. Nylon tube; 23. Flow detection element; 24. Housing; 25. First through hole. Detailed Implementation

[0042] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0043] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0046] Example 1

[0047] The liquid cooling component provided in this embodiment is used in the battery pack to cool the battery pack, and also integrates a fire alarm function to suppress thermal runaway in the event of thermal runaway.

[0048] like Figures 1 to 5 The diagram illustrates a specific embodiment of the liquid cooling assembly provided in this example. It includes a liquid cooling plate 1, a first connector 5, a second connector 6, and a spray assembly 7. The liquid cooling plate 1 has a cooling channel 2 inside, with an inlet 3 and an outlet 4. The first connector 5 is connected to the inlet 3, and the second connector 6 is connected to the outlet 4. The spray assembly 7 is disposed on the first connector 5 and / or the second connector 6. The spray assembly 7 includes a fire detection element and a nozzle. The fire detection element is electrically connected to the nozzle, and the nozzle is connected to the first connector 5 and / or the second connector 6.

[0049] By setting the spray assembly 7 on the first connector 5 and / or the second connector 6, if the fire detection device detects high temperature during thermal runaway inside the enclosure 24 or abnormalities such as smoke inside the enclosure, the signal detected by the fire detection device is transmitted to the nozzle. After receiving the signal, the nozzle opens and activates the spray function, so that the coolant is sprayed into the enclosure in a mist to suppress thermal runaway. By combining the spray assembly and the first connector, the coolant flowing into the liquid cooling plate 1 is utilized, and the structure is compact, further improving safety.

[0050] It should be noted that the signal transmission between the fire detection device and the spray unit can be accomplished through an externally installed controller. The fire detection device transmits the signal to the controller, and after receiving the signal, the controller transmits the start signal to the nozzle to start the nozzle; or the controller can be directly integrated into the nozzle to perform the signal transmission between the fire detection device and the nozzle.

[0051] Specifically, the spray assembly 7 can be disposed on the first connector 5, the second connector 6, or both the first connector 5 and the second connector 6. The specific placement depends on the location of the first connector 5 and the second connector 6 within the battery pack. Preferably, the spray assembly 7 is disposed only on the first connector 5, utilizing the coolant that has not yet undergone heat exchange, resulting in better control of thermal runaway. Furthermore, placing the spray assembly 7 on the first connector 5 connected to the inlet 3 facilitates the spraying of coolant.

[0052] Specifically, the nozzle is an electric nozzle, which is activated based on the detection signal from the fire detection device.

[0053] like Figure 3 and Figure 4 As shown, in this embodiment of the liquid cooling assembly, the spray assembly 7 is disposed on the first connector 5. The first connector 5 includes a first body 8, a first connector 10, and a liquid inlet head 11. The first body 8 has a first liquid accumulation chamber 9, and the nozzle communicates with the first liquid accumulation chamber 9. The fire detection component is disposed on the first body 8. The first connector 10 and the liquid inlet head 11 are both communicated and disposed on the first body 8. The first connector 10 communicates with the liquid inlet 3, and the liquid inlet head 11 is used to communicate with an external liquid cooling system. The first liquid accumulation chamber 9 allows the liquid inlet head 11 to be connected to multiple first connectors 10, meaning that multiple liquid cooling plates 1 can be supplied with liquid through one first connector 5.

[0054] Specifically, the first entity 8 includes, but is not limited to, being Figure 3 The rectangular structure can also be a columnar structure; the first connector 10 is a bamboo joint pipe joint, which is highly compatible with pipes and easy to install and disassemble.

[0055] Alternatively, as an alternative implementation, the first connector 10 can be omitted, and the first liquid accumulation chamber 9 can be directly connected to the inlet 3 via a pipe. Alternatively, a quick-connect plug can be used to connect the inlet 3 and the first liquid accumulation chamber 9.

[0056] like Figure 1 and Figure 5 As shown, in the liquid cooling assembly provided in this embodiment, the second connector 6 includes a second body 12, a second connector 14, and a liquid outlet 15. The second body 12 has a second liquid accumulation chamber. The second connector 14 and the liquid outlet 15 are both connected to the second body 12. The second connector 14 is connected to the liquid outlet 4, and the liquid outlet 15 is used to connect to an external liquid cooling system.

[0057] Specifically, the second body 12 includes, but is not limited to, being Figure 5The rectangular structure can also be a columnar structure; the second connector 14 is a bamboo joint pipe joint, which is highly compatible with pipes and easy to install and disassemble.

[0058] Alternatively, as an alternative implementation, the second connector 14 can be omitted, and the second liquid accumulation chamber can be directly connected to the liquid outlet 4 via a pipe.

[0059] like Figure 1 As shown, the liquid cooling assembly provided in this embodiment includes a liquid cooling plate 1 comprising a first side plate 16, a second side plate 17, and a third side plate 18 connected in sequence. The first side plate 16, the second side plate 17, and the third side plate 18 surround and form a receiving cavity 20 for placing a battery pack 19. Each of the first side plate 16, the second side plate 17, and the third side plate 18 has at least one set of communicating cavities inside, and multiple sets of communicating cavities are connected in sequence to form the cooling channel 2.

[0060] The first side plate 16, the second side plate 17 and the third side plate 18 are arranged to form a U-shaped structure. A liquid cooling plate 1 can cool the three sides of the battery pack 19. The coolant flows unidirectionally inside the liquid cooling plate 1, with low flow resistance and high cooling efficiency.

[0061] Alternatively, as an alternative implementation, the liquid cooling plate 1 is a single-plate structure, with separate liquid cooling plates 1 disposed on different surfaces of the battery pack 19.

[0062] like Figure 1 and Figure 2 As shown, in one specific embodiment of the liquid cooling plate 1, a set of communicating cavities are provided inside the first side plate 16, the second side plate 17 and the third side plate 18. The liquid inlet 3 and the liquid outlet 4 are respectively provided on the first side plate 16 and the third side plate 18. Specifically, the liquid inlet 3 is provided on the first side plate 16 and the liquid outlet 4 is provided on the third side plate 18. The coolant flows out from the liquid outlet 4 after passing through the first side plate 16, the second side plate 17 and the third side plate 18 in sequence.

[0063] like Figure 6 and Figure 7As shown, in another specific embodiment of the liquid cooling plate 1, the first side plate 16, the second side plate 17, and the third side plate 18 each have two sets of communicating cavities. The liquid inlet 3 and the liquid outlet 4 are simultaneously located on either the first side plate 16 or the third side plate 18. Specifically, the liquid inlet 3 and the liquid outlet 4 are simultaneously located on the first side plate 16, and the two sets of communicating cavities in each side plate are parallel to each other, arranged in upper and lower layers. The coolant sequentially passes through the upper communicating cavity of the first side plate 16, the upper communicating cavity of the second side plate 17, the upper communicating cavity of the third side plate 18, the lower communicating cavity of the third side plate 18, the lower communicating cavity of the second side plate 17, and the lower communicating cavity of the first side plate 16, and finally flows out from the liquid outlet 4. In this embodiment, the coolant transportation process involves cyclic flow.

[0064] Alternatively, as an alternative implementation, other numbers of connecting cavities can be configured to form a cooling channel 2 with more complex flow and more circulation. Multiple sets of connecting cavities can have the same cross-sectional size, or different sizes of connecting cavities can be set according to the different heat dissipation at different locations of the battery pack 19. The shape of the connecting cavities is not fixed, as long as they can form a complete cooling channel 2.

[0065] like Figure 2 As shown, in the liquid cooling assembly provided in this embodiment, the cooling channel 2 is provided with multiple fins 21. The fins 21 improve the heat exchange efficiency, further improving the cooling efficiency of the battery pack 19.

[0066] Specifically, the fins 21 can be in the form of partitions that divide the cooling channels 2 into a number of channels. Alternatively, as an alternative implementation, the fins 21 can also be protrusions provided on the inner wall of the cooling channels 2, which do not divide the cooling channels 2, but still serve to increase the heat exchange area.

[0067] In other embodiments, fins 21 may not be provided.

[0068] like Figure 1 As shown, the liquid cooling assembly provided in this embodiment has multiple liquid cooling plates 1, and the liquid inlets 3 and liquid outlets 4 of the multiple liquid cooling plates 1 are all located on the same side of the housing 24; the liquid inlets 3 of the multiple liquid cooling plates 1 are all connected to the first connector 5, and the liquid outlets 4 of the multiple liquid cooling plates 1 are all connected to the second connector 6.

[0069] The liquid inlet 3 and the liquid outlet 4 are located on the same side, that is, in the space inside the housing 24, which is compact and saves space. The first connector 5 and the second connector 6 are connected to multiple liquid cooling plates 1, which saves the number of connectors, occupies less space, facilitates installation and enclosure, and reduces costs. At the same time, multiple liquid cooling plates 1 are all connected to a first connector 5 and a second connector 6, and the inlet and outlet flow rates of the coolant are the same, which ensures the temperature difference balance between each battery pack 19.

[0070] In one specific embodiment, there are two U-shaped liquid cooling plates 1 arranged in parallel, with the first connector 5 and the second connector 6 both located in the middle between the two liquid cooling plates 1, saving piping and space. This embodiment is only an example; the specific configuration can be adjusted according to the number of battery packs within the battery pack.

[0071] Alternatively, as an alternative implementation, the inlet 3 and the outlet 4 are located on different sides, that is, the first connector 5 and the second connector 6 are located on different sides inside the housing 24.

[0072] like Figure 1 As shown, in the liquid cooling assembly provided in this embodiment, the first connector 5 and the liquid inlet 3, and the second connector 6 and the liquid outlet 4 are all connected by nylon tubes 22.

[0073] The nylon tube 22 exhibits excellent wear resistance and a long service life, and demonstrates superior performance at high temperatures. Alternatively, as an alternative embodiment, the nylon tube 22 can be replaced with a tube made of other materials.

[0074] like Figure 4 As shown, the liquid cooling assembly provided in this embodiment further includes a flow detection element 23, which is disposed on the first connector 5, and the detection end of the flow detection element 23 is located inside the first connector 5. The flow detection element 23 can be connected to a host computer via cable or wirelessly, facilitating timely viewing of the detection signal by personnel.

[0075] Specifically, the flow detection element 23 is a flow sensor, which is installed in the first liquid accumulation chamber 9 of the first connector 5. It can detect the flow rate and velocity of the coolant entering the liquid cooling plate 1 in real time. The flow detection element 23 can communicate with the external liquid cooling system. The external liquid cooling system adjusts the flow rate delivered to the liquid cooling plate 1 based on the detection status of the flow detection element 23, which facilitates the control of the overall temperature.

[0076] In the liquid cooling assembly provided in this embodiment, the fire detection component is one or more of a temperature detection component and a smoke detection component. Specifically, the temperature detection component is a temperature sensor, and the smoke detection component is a smoke sensor.

[0077] During the cooling process of the liquid cooling component for the battery pack 19, the fire detection component monitors the internal environment of the enclosure 24. In the event of thermal runaway, the nozzles are activated to spray the coolant into the enclosure 24 in a mist form to quickly suppress the runaway and prevent its spread.

[0078] Example 2

[0079] like Figure 8 and Figure 9 As shown, this is a specific implementation of the battery pack provided in this embodiment, including a housing 24, a battery pack 19, and a liquid cooling component as described in any one of Embodiment 1. The battery pack 19 is disposed inside the housing 24; the liquid cooling component is disposed inside the housing 24 and cools the battery pack 19.

[0080] The first installation method involves preparing the housing 24, then installing the liquid cooling assembly inside the housing 24. After installation, the battery pack 19 is installed in the housing cavity 20 of the liquid cooling assembly. The second installation method involves first installing the liquid cooling assembly on the battery pack 19. After installation, the entire assembly is placed inside the housing 24, and then the inlet 11 and outlet 15 are welded to the housing 24 to ensure the housing 24 is airtight.

[0081] like Figure 8 and Figure 9 As shown, in the battery pack provided in this embodiment, the side wall of the housing 24 is provided with a first through hole 25 and a second through hole 13, the liquid inlet head 11 of the first connector 5 is disposed in the first through hole 25, and the liquid outlet head 15 of the second through hole 13 is disposed in the second through hole 13.

[0082] Specifically, the first through hole 25 and the second through hole 13 are arranged along the height direction, so that the pipe arrangement between the battery pack and the external liquid cooling system is more compact and saves space.

[0083] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this utility model.

Claims

1. A liquid cooling assembly, characterized in that, include: A liquid cooling plate (1) has a cooling channel (2) inside, the cooling channel (2) has a liquid inlet (3) and a liquid outlet (4), and the liquid cooling plate (1) has multiple channels; The first connector (5) and the second connector (6) are connected to the first connector (5), and the liquid inlets (3) of the plurality of liquid cooling plates (1) are connected to the second connector (6). A spray assembly (7) is disposed on the first connector (5). The spray assembly (7) includes a fire detection component and a nozzle. The fire detection component is electrically connected to the nozzle. The first connector (5) includes a first body (8) having a first liquid accumulation chamber (9). The nozzle communicates with the first liquid accumulation chamber (9), and the fire detection component is disposed on the first body (8). The liquid cooling plate (1) includes a first side plate (16), a second side plate (17), and a third side plate (18) connected in sequence.

2. The liquid cooling assembly according to claim 1, characterized in that, The first connector (5) also includes: The first connector (10) and the liquid inlet (11) are both connected to the first body (8). The first connector (10) is connected to the liquid inlet (3), and the liquid inlet (11) is used to connect to the external liquid cooling system. And / or, the second connector (6) includes: The second body (12) has a second fluid accumulation chamber; The second connector (14) and the liquid outlet (15) are both connected to the second body (12). The second connector (14) is connected to the liquid outlet (4), and the liquid outlet (15) is used to connect to an external liquid cooling system.

3. The liquid cooling assembly according to claim 1, characterized in that, The first side plate (16), the second side plate (17) and the third side plate (18) surround and form a receiving cavity (20) for placing the battery pack (19); The first side plate (16), the second side plate (17) and the third side plate (18) are each provided with at least one set of connecting cavities, and multiple sets of connecting cavities are connected in sequence to form the cooling channel (2).

4. The liquid cooling assembly according to claim 3, characterized in that, The first side plate (16), the second side plate (17) and the third side plate (18) are each provided with a set of communicating cavities, and the liquid inlet (3) and the liquid outlet (4) are respectively provided on the first side plate (16) and the third side plate (18); Alternatively, the first side plate (16), the second side plate (17), and the third side plate (18) are each provided with two sets of the communicating cavities, and the liquid inlet (3) and the liquid outlet (4) are simultaneously provided on the first side plate (16) or the third side plate (18).

5. The liquid cooling assembly according to claim 1, characterized in that, The cooling channel (2) is provided with multiple fins (21).

6. The liquid cooling assembly according to claim 1, characterized in that, The liquid inlet (3) and liquid outlet (4) of the plurality of liquid cooling plates (1) are all located on the same side of the housing (24).

7. The liquid cooling assembly according to claim 1, characterized in that, The first connector (5) and the inlet (3) are connected by nylon tubes (22), and the second connector (6) and the outlet (4) are connected by nylon tubes (22).

8. The liquid cooling assembly according to claim 1, characterized in that, Also includes: A flow detection element (23) is disposed on the first connector (5), and the detection end of the flow detection element (23) is located inside the first connector (5); And / or, the fire detection device is one or more of temperature detection devices and smoke detection devices.

9. A battery pack, characterized in that, The device includes a housing (24), a battery pack (19), and a liquid cooling assembly according to any one of claims 1-8, wherein the battery pack (19) is disposed within the housing (24); the liquid cooling assembly is disposed within the housing (24) and cools the battery pack (19).

10. The battery pack according to claim 9, characterized in that, The side wall of the housing (24) is provided with a first through hole (25) and a second through hole (13). The liquid inlet head (11) of the first connector (5) is provided in the first through hole (25), and the liquid outlet head (15) of the second through hole (13) is provided in the second through hole (13).

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