Battery pack and electric equipment

Abstract

The utility model discloses a battery pack and electric equipment, and belongs to the technical field of batteries, and the battery pack comprises a box body with a containing cavity; the multiple battery packs are arranged in the containing cavity and comprise the first battery pack and the second battery pack, and the first battery pack and the second battery pack are arranged in a stacked mode in the first direction; the first liquid cooling part is arranged in the containing cavity and arranged between the first battery pack and the second battery pack at intervals, and the first battery pack and the second battery pack are connected with the first liquid cooling part; the multiple bearing pieces are arranged in the containing cavity, the bearing pieces are arranged on the two opposite side walls of the box body in the second direction respectively, the bearing pieces bear the first liquid cooling piece in the first direction, one of the bearing pieces and the first liquid cooling piece is provided with a limiting part, and the other one of the bearing pieces and the first liquid cooling piece is provided with a limiting groove allowing the limiting part to be embedded. The battery pack is beneficial for assisting in bearing the first liquid cooling part and limiting the first liquid cooling part through cooperation of the limiting part and the limiting groove, and the structural stability of the battery pack and the first liquid cooling part which are integrally stacked is improved.

Description

Technical Field

[0001] This application belongs to the field of battery technology, specifically relating to a battery pack and electrical equipment. Background Technology

[0002] Currently, to improve the overall energy storage performance of battery packs, some battery packs incorporate multiple battery modules arranged in a stacked configuration, with cooling systems typically stacked between adjacent modules. However, as the number of batteries and other structural components in each layer increases, the overall weight of the battery pack increases, requiring the cooling system to withstand the greater weight of the upper battery modules. This poses a greater challenge to the structural stability of both the cooling system and the upper battery modules. Utility Model Content

[0003] The purpose of this utility model is to provide a battery pack to solve the above-mentioned technical problems; another purpose of this application is to provide an electrical device that uses the above-mentioned battery pack.

[0004] Technical solution: A battery pack according to an embodiment of this application, the battery pack having intersecting first and second directions, the battery pack comprising:

[0005] The box-shaped enclosure has a receiving cavity;

[0006] Multiple battery packs are disposed in the receiving cavity, and the multiple battery packs include a first battery pack and a second battery pack, which are stacked along the first direction.

[0007] A first liquid cooling component is disposed in the receiving cavity. The first liquid cooling component is disposed between the first battery pack and the second battery pack, and the first battery pack and the second battery pack are respectively connected to the first liquid cooling component.

[0008] Multiple support members are provided in the receiving cavity. The box body is provided with the support members on two opposite side walls in the second direction. The support members support the first liquid cooling component in the first direction. One of the support members and the first liquid cooling component is provided with a limiting part, and the other is provided with a limiting groove for the limiting part to be embedded.

[0009] In some embodiments, the battery pack further has a third direction that intersects each of the first direction and the second direction;

[0010] The carrier extends along the third direction, and multiple limiting grooves and multiple limiting portions are provided. The multiple limiting grooves and multiple limiting portions are spaced apart along the third direction, and each limiting groove corresponds to at least one limiting portion.

[0011] In some embodiments, the housing includes a base plate and a frame, the base plate and the frame forming the receiving cavity, the support member being disposed on the frame, and the frame being connected to the first liquid cooling member in the second direction.

[0012] In some embodiments, the limiting groove is disposed on the carrier, the housing has an opening communicating with the receiving cavity in the first direction, the limiting groove has a slot for the limiting part to be inserted, and the slot faces the opening in the first direction.

[0013] In some embodiments, the first battery pack includes a first end plate, a plurality of first batteries, and a second end plate arranged along a third direction, wherein the first end plate and the second end plate are respectively connected to one of the first batteries;

[0014] The second battery pack includes a third end plate, a plurality of second batteries, and a fourth end plate arranged along the third direction, wherein the third end plate and the fourth end plate are respectively connected to one of the second batteries;

[0015] The battery pack also includes multiple support components;

[0016] The first end plate and the third end plate are spaced apart in the first direction, and the support member is supported between the first end plate and the third end plate;

[0017] And / or, the second end plate and the fourth end plate are spaced apart in the first direction, and the support member is supported between the second end plate and the fourth end plate.

[0018] In some embodiments, the battery pack further includes a thermally conductive buffer disposed between the first liquid cooler and the second battery pack, and the thermally conductive buffer is connected to the first liquid cooler and the second battery pack respectively.

[0019] In some embodiments, the second battery pack further includes a plurality of busbars disposed on the side of the second battery facing the first liquid cooler, the busbars being electrically connected to adjacent second batteries, and at least a portion of the busbars being thermally connected to the thermally conductive buffer.

[0020] In some embodiments, a plurality of thermally conductive buffers are provided, the thermally conductive buffers extend along the first direction, and the plurality of thermally conductive buffers are spaced apart along the second direction. In the second direction, an exhaust channel is formed between adjacent thermally conductive buffers, the second battery, and the first liquid cooling component. The exhaust channel is configured to allow the second battery to release pressure and exhaust gas when the pressure in the second battery exceeds a threshold.

[0021] In some embodiments, the battery pack further includes a second liquid cooling component disposed in the receiving cavity and on the side of the second battery pack opposite to the first battery pack. The second liquid cooling component is connected to the second battery pack and the housing respectively.

[0022] Accordingly, the electrical device described in this application includes the aforementioned battery pack.

[0023] Beneficial Effects: A battery pack according to an embodiment of this application includes a housing, multiple battery packs, a first liquid cooling component, and multiple support components. The housing has a receiving cavity, in which the multiple battery packs, the first liquid cooling component, and the multiple support components are respectively disposed. The multiple battery packs include a first battery pack and a second battery pack, which are stacked along a first direction. The first liquid cooling component is disposed between the first battery pack and the second battery pack, and the first battery pack and the second battery pack are respectively connected to the first liquid cooling component. Support components are respectively provided on two opposite side walls of the housing in a second direction. The support components support the first liquid cooling component in the first direction. One of the support components and the first liquid cooling component is provided with a limiting part, and the other is provided with a limiting groove for the limiting part to be embedded. The first liquid cooling component carries the first battery pack in the first direction. The first liquid cooling component is supported by a support component set on the housing, thereby transferring part of the load on the first liquid cooling component to the support component and the housing. At the same time, the first liquid cooling component and the support component are limited by the cooperation of the limiting part and the limiting groove, which further improves the assembly stability of the first liquid cooling component, thereby improving the structural stability of the stacked battery pack and the first liquid cooling component in the housing cavity. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is an exploded structural diagram of the battery pack according to an embodiment of this application;

[0026] Figure 2 This is a schematic diagram of the battery pack structure according to an embodiment of this application;

[0027] Figure 3 This is a schematic cross-sectional view of the battery pack in an embodiment of this application along a direction perpendicular to a third party.

[0028] Figure 4 This is a schematic diagram of the structure of the box in an embodiment of this application;

[0029] Figure 5This is a schematic cross-sectional view of the battery pack in an embodiment of this application, perpendicular to the second direction.

[0030] Figure 6 This is a schematic diagram of the structure of the battery pack, the first liquid cooler, and the second liquid cooler according to an embodiment of this application;

[0031] Figure 7 yes Figure 6 Enlarged view of section A;

[0032] Reference numerals: 1. Housing; 10. Receiving cavity; 11. Opening; 12. Bottom plate; 13. Frame; 130. First part; 131. Second part; 132. Third part; 133. Fourth part; 14. Cover; 2. Battery pack; 20. First battery pack; 200. First end plate; 201. First battery; 2010. First terminal post; 202. Second end plate; 203. First side plate; 21. Second battery pack; 210. Third end plate; 211. Second... Battery; 2110, Second terminal post; 212, Fourth end plate; 213, Second side plate; 3, First liquid cooling component; 30, Limiting part; 31, First liquid inlet; 32, First liquid outlet; 4, Support component; 40, Limiting groove; 400, Groove opening; 5, Support component; 6, Thermally conductive buffer component; 60, Exhaust channel; 7, Manifold; 8, Second liquid cooling component; 80, Second liquid inlet; 81, Second liquid outlet; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0034] In the description of this application, it should be understood that the terms "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application 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 on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, and "at least one" can mean one, two, or more, unless otherwise explicitly specified.

[0035] Currently, in multi-layered battery packs, cooling systems are typically stacked between adjacent battery packs. These cooling systems are mostly fixedly connected to the battery pack housing by directly connecting to the adjacent battery packs. However, as the number of batteries and other structural components in each layer of the battery pack increases, the overall weight of the battery pack increases. The cooling system needs to withstand the greater weight of the upper battery packs, posing a greater challenge to the structural stability of both the cooling system and the upper battery packs.

[0036] In view of this, refer to Figures 1 to 7 This application provides a battery pack designed to overcome at least one of the aforementioned technical problems.

[0037] It should be noted that the following embodiments of this application introduce a first direction X, a second direction Y, and a third direction Z that intersect each other. Specifically, the first direction X is approximately parallel to the overall height direction of the battery pack, the second direction Y is approximately parallel to the overall width direction of the battery pack, and the third direction Z is approximately parallel to the overall length direction of the battery pack.

[0038] Reference Figures 1 to 7 A battery pack includes a housing 1, multiple battery packs 2, a first liquid cooling component 3, and multiple support components 4.

[0039] The housing 1 has a receiving cavity 10, in which multiple battery packs 2, a first liquid cooling component 3, and multiple support components 4 are respectively disposed. The multiple battery packs 2 include a first battery pack 20 and a second battery pack 21, which are stacked along a first direction X. The first liquid cooling component 3 is disposed between the first battery pack 20 and the second battery pack 21, and the first battery pack 20 and the second battery pack 21 are respectively connected to the first liquid cooling component 3. Support components 4 are respectively provided on two opposite side walls of the housing 1 in the second direction Y. The support components 4 support the first liquid cooling component 3 in the first direction X. One of the support components 4 and the first liquid cooling component 3 has a limiting part 30, and the other has a limiting groove 40 for the limiting part 30 to be embedded.

[0040] It is understandable that the first liquid cooling component 3 supports the first battery pack 20 in the first direction X. By providing support components 4 on opposite sides of the housing 1, the first liquid cooling component 3 can be further supported, thereby transferring part of the load on the first liquid cooling component 3 to the support components 4 and the housing 1. At the same time, the first liquid cooling component 3 and the support components 4 are limited by the cooperation of the limiting part 30 and the limiting groove 40, which further improves the assembly stability of the first liquid cooling component 3, thereby improving the structural stability of the stacked battery pack 2 and the first liquid cooling component 3 located in the receiving cavity 10.

[0041] In addition, in other embodiments, in order to further improve the stability of the first liquid cooling component 3 and the first battery pack 20 it carries, the side wall of the housing 1 in the third direction Z can also be provided with a support component 4 to further distribute the load of the first liquid cooling component 3, which will not be described in detail here.

[0042] In some embodiments, refer to Figures 1 to 4 The support member 4 extends along the third direction Z. Multiple limiting grooves 40 and multiple limiting parts 30 are provided respectively. The multiple limiting grooves 40 and multiple limiting parts 30 are arranged at intervals along the third direction Z, and each limiting groove 40 is corresponding to at least one limiting part 30.

[0043] For example, refer to Figure 2 and Figure 5 The limiting groove 40 and the limiting part 30 are set in a one-to-one correspondence. In other embodiments, by adjusting the size of the limiting groove 40 and the limiting part 30, multiple limiting parts 30 can also be set to be embedded in a single limiting groove 40 at the same time, so as to satisfy the requirement of limiting the first liquid cooling component 3.

[0044] It is understood that, in some embodiments, reference is made to... Figure 4The support member 4 can be integrally formed with the housing 1. In other embodiments, the support member 4 can also be assembled with the housing 1 separately, such as by screwing the support member 4 to the housing 1. In addition, in some embodiments, multiple support members 4 can be respectively provided on the opposite side walls of the housing 1 in the second direction Y in the receiving cavity 10. That is, multiple support members 4 on each side can be arranged at intervals along the third direction Z and jointly support the first liquid cooling component 3. This will not be elaborated further here.

[0045] In some embodiments, refer to Figure 3 and Figure 4 The limiting groove 40 is provided on the bearing member 4. The box body 1 has an opening 11 in the first direction X that communicates with the receiving cavity 10. The limiting groove 40 has a slot 400 for the limiting part 30 to be inserted, and the slot 400 faces the opening 11 in the first direction X.

[0046] When assembling the first liquid cooling component 3, after the first liquid cooling component 3 is introduced into the receiving cavity 10 through the opening 11, the limiting part 30 can be directly aligned with the corresponding limiting groove 40, and the limiting part 30 can be quickly embedded into the corresponding limiting groove 40 along the first direction X, which facilitates the rapid positioning of the first liquid cooling component 3. In addition, in other embodiments, in order to further improve the structural stability of the first liquid cooling component 3 and the battery pack 2, threaded holes can be provided on the groove walls of the limiting part 30 and the limiting groove 40 respectively. By adding screws to lock the limiting part 30 and the housing 1, the stability of the first liquid cooling component 3 can be further enhanced.

[0047] Furthermore, it should be noted that in other embodiments, the limiting groove 40 can also be provided on the first liquid cooling component 3. In this case, it can be understood that by providing a limiting part 30 protruding on the side of the bearing component 4 facing the first liquid cooling component 3, the limiting part 30 can be embedded in the limiting groove 40 on the first liquid cooling component 3 when the first liquid cooling component 3 is installed, thereby achieving the limiting and fixing effect.

[0048] In some embodiments, refer to Figures 1 to 5 The housing 1 includes a base plate 12 and a frame 13. The frame 13 is disposed on and connected to the base plate 12 to form a receiving cavity 10. The support member 4 is disposed on the frame 13, and the frame 13 is connected to the first liquid cooling member 3 in the second direction Y.

[0049] Specifically, refer to Figures 1 to 5The frame 13 includes a first part 130, a second part 131, a third part 132, and a fourth part 133 connected together. The first part 130 and the third part 132 are arranged in the second direction Y, and the second part 131 and the fourth part 133 are arranged in the third direction Z. The first part 130 and the third part 132 are respectively provided with a support member 4. The first part 130, the second part 131, the third part 132, the fourth part 133 and the support member 4 can be integrally formed. In this embodiment, the support member 4 connects the second part 131 and the fourth part 133 in the third direction Z, which can also improve the strength of the overall frame 13 structure.

[0050] In some embodiments, refer to Figure 1 , Figure 2 and Figure 5 The first battery pack 20 includes a first end plate 200, a plurality of first batteries 201, and a second end plate 202 arranged along the third direction Z. The first end plate 200 and the second end plate 202 are respectively connected to one first battery 201. The second battery pack 21 includes a third end plate 210, a plurality of second batteries 211, and a fourth end plate 212 arranged along the third direction Z. The third end plate 210 and the fourth end plate 212 are respectively connected to one second battery 211.

[0051] It should be noted that in this embodiment, the first battery pack 20 is provided in two groups and spaced apart along the third direction Z, and the second battery pack 21 is also provided in two groups and spaced apart along the third direction Z. Each group of the first battery pack 20 and each group of the second battery pack 21 are opposite each other in the first direction X. In other embodiments, the number of the first battery pack 20 and the second battery pack 21 can be flexibly increased or decreased as needed.

[0052] In some embodiments, refer to Figure 1 , Figure 2 and Figure 5 The battery pack also includes multiple support members 5. A first end plate 200 and a third end plate 210 are spaced apart in the first direction X, and support members 5 are positioned between the first end plate 200 and the third end plate 210. In this embodiment, two support members 5 are positioned between each first end plate 200 and its corresponding third end plate 210, and the two support members 5 are spaced apart along the second direction Y. In other embodiments, more support members 5 can be flexibly added as needed to strengthen the structure.

[0053] In this embodiment, the first liquid cooling component 3 is simultaneously spaced between the first end plate 200 and the third end plate 210. Therefore, after the first end plate 200 and the first liquid cooling component 3 are mechanically fixed, the end of the support component 5 facing the first end plate 200 is connected to the first liquid cooling component 3, and the end of the support component 5 facing the third end plate 210 is connected to the third end plate 210, thereby enabling the support component 5 to support the first end plate 200 and the third end plate 210. Specifically, matching screw holes can be provided at the corresponding ends of the first liquid cooling component 3, the third end plate 210, and the support component 5, and the support component 5 and the first liquid cooling component 3, and the support component 5 and the third end plate 210 can be locked together by bolts.

[0054] In some embodiments, refer to Figure 1 , Figure 2 and Figure 5 The second end plate 202 and the fourth end plate 212 are spaced apart in the first direction X, and a support member 5 is provided between the second end plate 202 and the fourth end plate 212. In this embodiment, two support members 5 are provided between each second end plate 202 and the corresponding fourth end plate 212, and the two support members 5 are spaced apart along the second direction Y. In other embodiments, more support members 5 can be flexibly added as needed to strengthen the structural strength.

[0055] In this embodiment, the first liquid cooling component 3 is also spaced between the second end plate 202 and the fourth end plate 212. Therefore, after the second end plate 202 is mechanically fixed to the first liquid cooling component 3, the end of the support component 5 facing the second end plate 202 is connected to the first liquid cooling component 3, and the end of the support component 5 facing the fourth end plate 212 is connected to the fourth end plate 212, thereby enabling the support component 5 to support the second end plate 202 and the fourth end plate 212. Specifically, matching screw holes can be provided at the corresponding ends of the first liquid cooling component 3, the fourth end plate 212, and the support component 5, and the support component 5 and the first liquid cooling component 3, and the support component 5 and the fourth end plate 212 can be locked together by bolts.

[0056] The support member 5 can assist in fixing the first battery pack 20, the first liquid cooler 3, and the second battery pack 21. At the same time, the support member 5 can distribute the load of the first liquid cooler 3 to the second end plate 202 and the fourth end plate 212 of each second battery pack 21, thereby reducing the load of the first battery pack 20 on the second battery 211 and improving the protection of the second battery 211.

[0057] In addition, refer to Figure 1 The first battery pack 20 also includes a first side plate 203. By setting the first side plate 203 on both sides of the first battery 201 in the second direction Y, the first side plate 203, together with the first end plate 200 and the second end plate 202, forms an enclosing structure around the first battery 201, thereby improving the overall structural stability of the first battery 201.

[0058] In addition, refer to Figure 1The second battery pack 21 also includes a second side plate 213. By setting the second side plate 213 on both sides of the second battery 211 in the second direction Y, the second side plate 213, together with the third end plate 210 and the fourth end plate 212, forms an enclosing structure around the second battery 211, thereby improving the overall structural stability of the first battery 201.

[0059] In some embodiments, refer to Figure 1 , Figure 6 and Figure 7 The battery pack also includes a thermally conductive buffer 6, which is disposed between the first liquid cooler 3 and the second battery pack 21, and is connected to both the first liquid cooler 3 and the second battery pack 21. The thermally conductive buffer 6 can be made of flexible thermally conductive materials, phase change materials, etc., and its thermal conductivity and buffering structure principle is existing technology and will not be elaborated here. The thermally conductive buffer 6 increases the contact area between the second battery 211 and the first liquid cooler 3, thereby improving the heat exchange effect between them. Simultaneously, the buffering effect of the thermally conductive buffer 6 further enhances the protection of both the second battery 211 and the first liquid cooler 3.

[0060] In some embodiments, refer to Figure 1 , Figure 6 and Figure 7 The second battery pack 21 also includes multiple busbars 7, which are located on the side of the second battery 211 facing the first liquid cooler 3. The busbars 7 are electrically connected to adjacent second batteries 211, and at least some of the busbars 7 are thermally connected to the thermally conductive buffers 6. It is understood that the busbars 7 are actually connected to the terminals of the second batteries 211. The heat generated at the battery terminals is relatively large compared to other locations. By directly attaching the thermally conductive buffers 6 to the busbars 7, the heat dissipation effect at the terminals and busbars 7 is further improved.

[0061] In some embodiments, refer to Figure 1 , Figure 6 and Figure 7 Multiple thermally conductive buffers 6 are provided. The thermally conductive buffers 6 extend along the first direction X. Multiple thermally conductive buffers 6 are spaced apart along the second direction Y. In the second direction Y, an exhaust channel 60 is formed between adjacent thermally conductive buffers 6, the second battery 211 and the first liquid cooling component 3. The exhaust channel 60 is configured to allow the second battery 211 to release pressure and exhaust gas when the pressure in the second battery 211 exceeds a threshold.

[0062] It is understood that the thermally conductive buffer 6 corresponds to the busbar 7 between adjacent terminals of each group of second batteries 211 in the third direction Z, and each thermally conductive buffer 6 is simultaneously attached to multiple busbars 7 in the third direction Z. In this embodiment, the pressure relief valve of the corresponding second battery 211 can be located between two terminals to facilitate direct exhaust towards the exhaust channel 60, thereby improving the pressure relief and exhaust effect, and enabling the exhaust gas to exchange heat with the first liquid cooling component 3 for cooling.

[0063] In some embodiments, refer to Figure 1 and Figure 3 The battery pack also includes a second liquid cooling component 8, which is disposed in the receiving cavity 10. The second liquid cooling component 8 is located on the side of the second battery pack 21 opposite to the first battery pack 20, and is connected to both the second battery pack 21 and the housing 1. Specifically, the second liquid cooling component 8 can be directly attached to the base plate 12 and mechanically fixed to the upper second battery pack 21. Heat exchange is achieved through the contact between the second liquid cooling component 8 and the second battery 211, thus improving the protection of the second battery 211.

[0064] Accordingly, this application provides an electrical device that includes the aforementioned battery pack. This electrical device can be an electronic device, a storage device, or a vehicle, etc. It is understood that this electrical device can possess all the technical features and corresponding beneficial effects of the aforementioned battery pack, which will not be elaborated further here.

[0065] The battery pack and electrical device provided in the embodiments of this application have been described in detail above, and specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery pack, characterized in that, The battery pack has intersecting first and second directions, and the battery pack includes: The box-shaped enclosure has a receiving cavity; Multiple battery packs are disposed in the receiving cavity, and the multiple battery packs include a first battery pack and a second battery pack, which are stacked along the first direction. A first liquid cooling component is disposed in the receiving cavity. The first liquid cooling component is disposed between the first battery pack and the second battery pack, and the first battery pack and the second battery pack are respectively connected to the first liquid cooling component. Multiple support members are provided in the receiving cavity. The box body is provided with the support members on two opposite side walls in the second direction. The support members support the first liquid cooling component in the first direction. One of the support members and the first liquid cooling component is provided with a limiting part, and the other is provided with a limiting groove for the limiting part to be embedded.

2. The battery pack according to claim 1, characterized in that, The battery pack also has a third direction that intersects the first direction and the second direction in pairs; The carrier extends along the third direction, and multiple limiting grooves and multiple limiting portions are provided. The multiple limiting grooves and multiple limiting portions are spaced apart along the third direction, and each limiting groove corresponds to at least one limiting portion.

3. The battery pack according to claim 2, characterized in that, The housing includes a base plate and a frame, the base plate and the frame forming the receiving cavity, the support member is disposed on the frame, and the frame is connected to the first liquid cooling member in the second direction.

4. The battery pack according to claim 2, characterized in that, The limiting groove is provided on the bearing member, the box body has an opening communicating with the receiving cavity in the first direction, the limiting groove has a slot for the limiting part to be inserted, and the slot faces the opening in the first direction.

5. The battery pack according to any one of claims 1 to 4, characterized in that, The first battery pack includes a first end plate, a plurality of first batteries, and a second end plate arranged along a third direction, wherein the first end plate and the second end plate are respectively connected to one of the first batteries; The second battery pack includes a third end plate, a plurality of second batteries, and a fourth end plate arranged along the third direction, wherein the third end plate and the fourth end plate are respectively connected to one of the second batteries; The battery pack also includes multiple support components; The first end plate and the third end plate are spaced apart in the first direction, and the support member is supported between the first end plate and the third end plate; And / or, the second end plate and the fourth end plate are spaced apart in the first direction, and the support member is supported between the second end plate and the fourth end plate.

6. The battery pack according to claim 5, characterized in that, The battery pack also includes a thermally conductive buffer, which is disposed between the first liquid cooler and the second battery pack, and is connected to the first liquid cooler and the second battery pack respectively.

7. The battery pack according to claim 6, characterized in that, The second battery pack also includes a plurality of busbars, which are disposed on the side of the second battery facing the first liquid cooler. The busbars are electrically connected to adjacent second batteries, and at least a portion of the busbars are thermally connected to the thermally conductive buffer.

8. The battery pack according to claim 6, characterized in that, The thermally conductive buffer is provided in multiple ways. The thermally conductive buffer extends along the first direction, and the multiple thermally conductive buffers are spaced apart along the second direction. In the second direction, an exhaust channel is formed between adjacent thermally conductive buffers, the second battery, and the first liquid cooling component. The exhaust channel is configured to allow the second battery to release pressure and exhaust gas when the pressure in the second battery exceeds a threshold.

9. The battery pack according to claim 1, characterized in that, The battery pack also includes a second liquid cooling component, which is disposed in the receiving cavity and on the side of the second battery pack away from the first battery pack. The second liquid cooling component is connected to the second battery pack and the housing respectively.

10. An electrical appliance, characterized in that, Includes the battery pack as described in any one of claims 1 to 9.

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