Battery pack and electric equipment

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack and electric equipment, and the battery pack comprises a box body, a battery pack and a protection structure, the battery pack is arranged in the box body; the liquid cooling structure is arranged in the box body and is connected with the battery pack; the protection structure is arranged in the box body, the protection structure comprises an energy absorption piece and a reinforcing piece, the energy absorption piece comprises a main body part, a first mounting cavity is formed in the main body part, the first mounting cavity is located between the liquid cooling structure and the inner wall of the box body, and the reinforcing piece is arranged in the first mounting cavity; according to the battery pack provided by the utility model, the liquid cooling structure can be protected through the energy absorption piece and the reinforcing piece, so that the liquid cooling structure is prevented from being damaged, and the safety performance of the battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack and electrical equipment. Background Art

[0002] In the design of power battery packs, multiple batteries need to be combined to form a battery pack to meet the required voltage and discharge current specifications; the power battery has a large discharge current, which causes the battery itself to heat up very high. If the temperature exceeds a certain range, it will cause great damage to the battery life and safety. Therefore, it is necessary to set a liquid cooling structure in the battery pack box to dissipate heat for the battery pack so that the battery pack can operate in a safe temperature environment. When the battery pack of the prior art is subjected to external squeezing and collision, the liquid cooling structure is easily damaged due to squeezing or collision with the inner wall of the box, resulting in leakage problems, which reduces the safety performance of the battery pack. Utility Model Content

[0003] Aiming to solve at least one of the technical problems existing in the prior art, the utility model provides a battery pack and an electrical device having the battery pack, wherein the battery pack can avoid damage to the liquid cooling structure and improve safety performance.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a battery pack having a first direction, wherein the battery pack includes a case, a battery pack and a protective structure; the battery pack is arranged in the case; the liquid cooling structure is arranged in the case and connected to the battery pack; the protective structure is arranged in the case, the protective structure includes an energy absorbing member and a reinforcement member, the energy absorbing member includes a main body, a first installation cavity is opened inside the main body, along the first direction, the first installation cavity is located between the liquid cooling structure and the inner wall of the case, and the reinforcement member is arranged in the first installation cavity.

[0005] In some embodiments, the battery pack includes a battery cell; the liquid cooling structure includes a current collector and a liquid cooling plate, along the first direction, the current collector is located between the battery cell and the inner wall of the box body, and the liquid cooling plate is connected to the current collector and to the side of the battery cell.

[0006] In some embodiments, the battery pack further has a second direction intersecting with the first direction, the thickness direction of the liquid cooling plate is perpendicular to the thickness direction of the box body, and the energy absorbing member extends along the second direction.

[0007] In some embodiments, a second installation cavity for accommodating the current collecting component is opened inside the main body, and a connecting port connected to the second installation cavity is opened in the main body, and the liquid cooling plate is connected to the current collecting component through the connecting port; along the first direction, the second installation cavity is located between the battery pack and the first installation cavity.

[0008] In some embodiments, the reinforcement extends along the second direction, and the reinforcement is provided with a through hole penetrating along the first direction.

[0009] In some embodiments, the energy absorbing member further includes a connecting portion disposed in the first mounting cavity, at least one end of the connecting portion is connected to an inner wall of the first mounting cavity along the first direction, and at least a portion of the connecting portion is disposed in the through hole.

[0010] In some embodiments, there are multiple through holes, and the multiple through holes are distributed along the second direction.

[0011] In some embodiments, along the first direction, the main body is provided with a groove which is recessed toward one end of the battery pack and away from the battery pack, and at least a portion of the battery pack is disposed in the groove.

[0012] In some embodiments, there are multiple liquid cooling plates, and an accommodation space for accommodating the battery pack is formed between two adjacent liquid cooling plates.

[0013] The utility model also provides an electrical device, wherein the electrical device comprises the battery pack described in any one of the above items.

[0014] Compared with the prior art, the battery pack provided by the embodiment of the utility model has the following beneficial effects:

[0015] (1) The battery pack includes a protective structure, which includes an energy-absorbing member and a reinforcing member, and the energy-absorbing member includes a main body. A first installation cavity is provided inside the main body, and along a first direction, the first installation cavity is located between the liquid cooling structure and the inner wall of the box body, so that the side wall of the first installation cavity can be located between the liquid cooling structure and the inner wall of the box body, so that when the box body is subjected to external impact or pressure along the first direction, the external impact force is first transmitted to the energy-absorbing member and then transmitted to the liquid cooling structure through the energy-absorbing member. In this process, the energy-absorbing member can play an energy-absorbing and buffering role on the impact force to reduce the impact force transmitted from the inner wall of the box body to the liquid cooling structure, thereby enabling the energy-absorbing member to protect the liquid cooling structure to avoid damage to the liquid cooling structure, thereby improving the safety performance of the battery pack.

[0016] (2) By installing a reinforcement member in the first installation cavity of the energy absorbing member, the reinforcement member can disperse the impact force and prolong the impact time of the energy absorbing member, so that the reinforcement member can further enhance the buffering energy absorption performance of the energy absorbing member, and then the energy absorbing member can further reduce the impact force transmitted from the inner wall of the box to the liquid cooling structure, so that the energy absorbing member can better protect the liquid cooling structure, and further improve the safety performance of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a battery pack provided by an embodiment of the utility model;

[0018] Figure 2 It is a partial exploded view of a battery pack provided by an embodiment of the utility model;

[0019] Figure 3 is a cross-sectional view of a battery pack provided by an embodiment of the utility model;

[0020] Figure 4 It is a schematic diagram of the structure of the energy absorbing member provided in the embodiment of the utility model;

[0021] Figure 5 is a first cross-sectional view of the energy absorbing member provided in an embodiment of the utility model;

[0022] Figure 6 yes Figure 5 A magnified schematic diagram of point A;

[0023] Figure 7 is a second cross-sectional view of the energy absorbing member provided in the embodiment of the utility model;

[0024] Figure 8 yes Figure 7 An enlarged schematic diagram of point B;

[0025] Fig. 9 is a third cross-sectional view of the energy absorbing member provided in the embodiment of the utility model;

[0026] Fig.10 is a fourth cross-sectional view of the energy absorbing member provided in an embodiment of the utility model;

[0027] Fig.11 It is a structural diagram of a reinforcement member provided in an embodiment of the utility model;

[0028] Fig.12 It is a schematic diagram of a liquid cooling structure provided by an embodiment of the utility model;

[0029] Fig.13 yes Fig.12 Enlarged schematic diagram of point C.

[0030] In the figure, 1, box body; 11, frame body; 12, bottom plate; 111, first end plate; 112, first side plate; 113, second end plate; 114, second side plate;

[0031] 2. Battery pack; 21. Battery cell;

[0032] 3. Protective structure; 31. Energy absorbing member; 32. Reinforcement member; 311. Main body; 312. Connecting portion; 321. Through hole; 3111. First mounting cavity; 3112. Second mounting cavity; 3113. Communication port; 3114. Groove; 3115. Opening; 3116. Connecting hole;

[0033] 4. Liquid cooling structure; 41. Current collecting member; 42. Liquid cooling plate; 43. Connecting pipe; 421. Accommodating space;

[0034] Y, first direction; X, second direction; Z, third direction. DETAILED DESCRIPTION

[0035] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0041] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0042] In the description of the embodiments of the present utility model, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0043] like Figure 1-5 As shown, a preferred battery pack of the embodiment of the utility model has a first direction Y, the battery pack includes a box body 1, a battery pack 2 and a protective structure 3; the battery pack 2 is arranged in the box body 1; the liquid cooling structure 4 is arranged in the box body 1 and connected to the battery pack 2; the protective structure 3 is arranged in the box body 1. The protective structure 3 includes an energy absorbing member 31 and a reinforcing member 32, the energy absorbing member 31 includes a main body 311, and a first installation cavity 3111 is opened inside the main body 311. Along the first direction Y, the first installation cavity 3111 is located between the liquid cooling structure 4 and the inner wall of the box body 1, and the reinforcing member 32 is arranged in the first installation cavity 3111.

[0044] Based on this technical solution, a first installation cavity 3111 located between the liquid cooling structure 4 and the inner wall of the box body 1 is opened inside the main body 311, and along the first direction Y, the side wall of the first installation cavity 3111 can be located between the liquid cooling structure 4 and the inner wall of the box body 1, so that when the box body 1 is subjected to external impact or pressure along the first direction, the external impact force is first transmitted to the energy absorbing member 31 and then transmitted to the liquid cooling structure 4 through the energy absorbing member 31. In this process, the energy absorbing member 31 can absorb and buffer the impact force to reduce the impact force transmitted from the inner wall of the box body 1 to the liquid cooling structure 4, so that the energy absorbing member 31 can protect the liquid cooling structure 4 to avoid damage to the liquid cooling structure 4, thereby improving the safety performance of the battery pack.

[0045] By installing the reinforcement member 32 in the first installation cavity 3111 of the energy absorbing member 31, when the energy absorbing member 31 is subjected to external impact or pressure, the energy absorbing member 31 will first contact the reinforcement member 32, so that the reinforcement member 32 can guide the distribution of force, so that the impact force will not be concentrated on one point of the energy absorbing member 31, but will be dispersed to a larger area around the reinforcement member 32, thereby reducing the destructive effect of the impact force on the overall structure of the energy absorbing member 31; at the same time, when the energy absorbing member 31 is impacted and elastically deformed, the first installation cavity 3111 in the energy absorbing member 31 will also absorb energy through compression and deformation, so that the energy absorbing member 31 can better play a buffering and energy absorbing role; at the same time, when the impact force acts on the reinforcement member 32, the reinforcement member 32 will also gradually deform, and the deformation process of the reinforcement member 32 requires a certain amount of time, so that the reinforcement member 32 can prolong the action time of the impact force in the energy absorbing member 31, thereby reducing the instantaneous damage of the impact force to the energy absorbing member 31, so that the energy absorbing member 31 has more time to adapt to and resist the impact force. Therefore, the utility model sets a first installation cavity 3111 in the energy absorbing member 31 and installs the reinforcement member 32 in the first installation cavity 3111, so that the reinforcement member 32 can disperse the impact force and prolong the impact time of the energy absorbing member 31, so that the reinforcement member 32 can further enhance the buffering energy absorption performance of the energy absorbing member 31, and then the energy absorbing member 31 can further reduce the impact force transmitted from the inner wall of the box body 1 to the liquid cooling structure 4, which helps the energy absorbing member 31 to better protect the liquid cooling structure 4 and further improve the safety performance of the battery pack.

[0046] Optionally, the energy absorbing member 31 may be made of any material that can absorb and buffer energy, such as foam, sponge, rubber, silicone, thermoplastic plastic, etc., and is not limited here.

[0047] Preferably, the energy absorbing member 31 is made of foam rubber.

[0048] Optionally, the reinforcing member 32 may be made of any material such as foam, silicone, rubber, foam plastic, etc. that can enhance the buffering and energy absorption performance of the energy absorbing member 31 , and is not limited here.

[0049] Preferably, the reinforcement member 32 is made of foam material.

[0050] See also Figure 1-Figure 3 The box body 1 provided in the embodiment of the utility model includes a frame body 11 and a bottom plate 12, the frame body 11 and the bottom plate 12 are connected and enclosed to form a receiving space, and the battery pack 2, the liquid cooling structure 4 and the protective structure 3 are all arranged in the receiving space.

[0051] Specifically, in this embodiment, the frame body 11 includes a first end plate 111 , a first side plate 112 , a second end plate 113 , and a second side plate 114 which are sequentially connected end to end.

[0052] Optionally, the battery pack 2 includes one battery cell 21 or a plurality of battery cells 21 .

[0053] In this embodiment, the battery pack 2 includes a plurality of battery cells 21 .

[0054] See also Figure 1 , Figure 2 , Fig.12 and Fig.13 The liquid cooling structure 4 provided in the embodiment of the utility model includes a current collector 41 and a liquid cooling plate 42. Along the first direction Y, the current collector 41 is located between the battery cell 21 and the inner wall of the box body 1; the liquid cooling plate 42 is connected to the current collector 41 and to the side of the battery cell 21. The heat dissipation treatment of the battery cell 21 by the liquid cooling plate 42 can enable the battery pack 2 to operate in a safe temperature environment; the current collector 41 can distribute the cooling liquid to the liquid cooling plate 42 and collect the cooling liquid from the liquid cooling plate 42, so that the cooling liquid flow path can be planned to ensure the heat dissipation of the battery cell 21 by the liquid cooling plate 42. Along the first direction Y, the current collector 41 is arranged between the battery cell 21 and the inner wall of the box body 1, and the protective structure 3 can protect the current collector 41, so that when the box body 1 is impacted by the outside along the first direction Y, the impact force transmitted from the inner wall of the box body 1 to the current collector 41 can be reduced, thereby avoiding damage to the current collector 41.

[0055] There are multiple liquid cooling plates 42, and an accommodation space 421 for accommodating the battery pack 2 is formed between two adjacent liquid cooling plates 42. The battery pack 2 is accommodated in the accommodation space 421, so that the two liquid cooling plates 42 forming the accommodation space 421 can respectively contact the two sides of the battery cell 21 of the battery pack 2, thereby increasing the contact area between the battery cell 21 and the liquid cooling structure 4, which helps to further improve the cooling effect of the liquid cooling structure 4 on the battery cell 21.

[0056] The battery pack also has a second direction X intersecting with the first direction Y, the thickness direction of the liquid cooling plate 42 is perpendicular to the thickness direction of the box body 1, and the energy absorbing member 31 extends along the second direction X. By making the thickness direction of the liquid cooling plate 42 perpendicular to the thickness direction of the box body 1, the liquid cooling plate 42 can be installed in the box body 1 in a side manner, so that the liquid cooling plate 42 can contact the side surface of the battery cell 21 with a larger area, thereby increasing the contact area between the liquid cooling plate 42 and the battery cell 21, and improving the cooling efficiency of the liquid cooling structure 4 for the battery cell 21.

[0057] The battery pack also has a third direction Z, and the first direction Y, the second direction X and the third direction Z intersect each other.

[0058] In this embodiment, the first direction Y, the second direction X and the third direction Z are perpendicular to each other, the first direction Y is parallel to the width direction of the box body 1, the second direction X is parallel to the length direction of the box body 1, and the third direction Z is parallel to the thickness direction of the box body 1.

[0059] In this embodiment, the first installation cavity 3111 is located between the inner wall of the frame 11 and the liquid cooling structure 4, and the protective structure 3 is used to provide side protection for the liquid cooling structure 4, that is, side protection along the first direction Y.

[0060] In some other embodiments, the first installation cavity 3111 may also be located between the inner wall of the base plate 12 and the liquid cooling structure 4, and the protective structure 3 is used to provide bottom protection for the liquid cooling structure 4; or the first installation cavity 3111 is located between the inner wall of the frame 11 and the liquid cooling structure 4 and between the inner wall of the base plate 12 and the liquid cooling structure 4, and the protective structure 3 is used to provide side protection and bottom protection for the liquid cooling structure 4.

[0061] Specifically, in this embodiment, the number of the protective structures 3 is two, and the two protective structures 3 are respectively disposed between the first side plate 112 and the battery pack 2 and between the second side plate 114 and the battery pack 2 .

[0062] In some other embodiments, the protection structure 3 may also be disposed between the first end plate 111 and the battery pack 2 and / or between the second end plate 113 and the battery pack 2 .

[0063] See also Figure 4-Figure 11The main body 311 has a second installation cavity 3112 for accommodating the current collector 41, and the main body 311 has a connecting port 3113 connected to the second installation cavity 3112. The liquid cooling plate 42 is connected to the current collector 41 through the connecting port 3113. Along the first direction Y, the second installation cavity 3112 is located between the battery pack 2 and the first installation cavity 3111. Placing the current collector 41 in the second installation cavity 3112 enables the main body 311 to wrap the current collector 41, so that the energy absorbing member 31 can provide a more comprehensive shockproof buffer and protection for the current collector 41 when the box body 1 is subjected to external impact, which helps to further avoid damage to the current collector 41. At the same time, by arranging the current collector 41 in the energy absorbing member 31, it can also help to reduce the space occupied by the current collector 41 and the energy absorbing member 31 in the box body 1, and effectively utilize the limited space in the box body 1.

[0064] In this embodiment, openings 3115 communicating with the second installation cavity 3112 are formed at two ends of the energy absorbing member 31 in the second direction X, and the current collecting member 41 is communicated with the coolant delivery mechanism through the openings 3115 .

[0065] In some other embodiments, the energy absorbing member 31 may be provided with an opening 3115 at any end in the length direction so that the current collecting member 41 can be connected to the coolant delivery mechanism through the opening 3115, or the energy absorbing member 31 may be provided with an opening 3115 in any direction so that the current collecting member 41 can be connected to the coolant delivery mechanism through the opening 3115, which is not limited here.

[0066] In this embodiment, there are multiple current collecting parts 41, and the liquid cooling structure 4 also includes a connecting pipe 43. In the second direction X, two adjacent current collecting parts 41 are connected through the connecting pipe 43; the two ends of the liquid cooling plate 42 in the first direction Y are respectively connected to the two current collecting parts 41.

[0067] In some other embodiments, one current collecting component 41 may be used to connect multiple liquid cooling plates 42, or two current collecting components 41 may be used to connect multiple liquid cooling plates 42, or three current collecting components 41 may be used to connect multiple liquid cooling plates 42, and any other configuration that can connect the current collecting component 41 and multiple liquid cooling plates 42 is not limited here.

[0068] In this embodiment, the main body 311 is provided with a plurality of second installation cavities 3112 distributed along the second direction X, and each second installation cavity 3112 is provided with a current collecting member 41; the main body 311 is also provided with a connecting hole 3116 for the connecting pipe 43 to pass through, and two adjacent second installation cavities 3112 are connected through the connecting hole 3116.

[0069] In this embodiment, there are multiple communication ports 3113 , which are sequentially arranged on the main body 311 along the second direction X, and the multiple liquid cooling plates 42 correspond to the multiple communication ports 3113 .

[0070] The reinforcement member extends along the second direction X, and the reinforcement member 32 is provided with a through hole 321 penetrating along the first direction Y. When the box body 1 is subjected to external impact or pressure, the energy absorbing member 31 will produce elastic deformation and generate material flow to play a buffering and energy absorbing role. By providing the through hole 321 in the reinforcement member 32, a flow space can be provided for the material flow of the energy absorbing member 31 through the through hole 321, thereby helping to enhance the buffering and energy absorbing performance of the energy absorbing member 31.

[0071] In this embodiment, there are multiple through holes 321, and the multiple through holes 321 are distributed along the second direction X. The multiple through holes 321 can not only provide more flow space for the material flow of the energy absorbing member 31, which helps to further enhance the buffering and energy absorbing performance of the energy absorbing member 31, but also can better guide the distribution of force in the energy absorbing member 31 and disperse the impact force of the reinforcement member 32 to a larger area, which helps to further enhance the buffering and energy absorbing performance of the energy absorbing member 31.

[0072] The energy absorbing member 31 further includes a connecting portion 312 disposed in the first installation cavity 3111. At least one end of the connecting portion 312 is connected to the inner wall of the first installation cavity 3111 along the first direction Y, and at least a portion of the connecting portion 312 is disposed in the through hole 321. By disposing the connecting portion 312 in the first installation cavity 3111, the connecting portion 312 can more effectively disperse the impact force when the energy absorbing member 31 is impacted by the outside world, which helps to improve the overall buffering and energy absorption performance of the energy absorbing member 31.

[0073] Preferably, the shape of the connecting portion 312 matches the shape of the through hole 321 .

[0074] In this embodiment, along the first direction Y, two ends of the connecting portion 312 are respectively connected to two inner walls of the first installation cavity 3111 .

[0075] Along the first direction Y, the main body 311 is recessed toward one end of the battery pack 2 and away from the battery pack 2 to form a groove 3114, and at least a portion of the battery pack 2 is disposed in the groove 3114. The groove 3114 can be used to insert the end of the battery pack 2 into the groove 3114 so that the groove 3114 can limit the battery pack 2, thereby facilitating the arrangement and positioning of the battery cells 21 in the accommodating space 421, and the groove 3114 can also be used to partially wrap the battery cells 21 located at the end of the battery pack 2 so that the energy absorbing member 31 can protect the battery cells 21, thereby further improving the safety performance of the battery pack.

[0076] In this embodiment, two opposite ends of the groove 3114 in the third direction Z are open.

[0077] In some other embodiments, the groove 3114 may be open at any end in the third direction Z or have side walls at both ends in the third direction Z, which is not limited here.

[0078] The utility model also provides an electrical device, which comprises any one of the above-mentioned battery packs.

[0079] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A battery pack, characterized in that: Having a first direction (Y), comprising: Box body (1); A battery pack (2) is arranged in the box (1); A liquid cooling structure (4) is disposed in the box (1) and connected to the battery pack (2); A protective structure (3) is arranged in the box body (1), and the protective structure (3) includes an energy absorbing member (31) and a reinforcing member (32). The energy absorbing member (31) includes a main body (311), and a first installation cavity (3111) is provided inside the main body (311). Along the first direction (Y), the first installation cavity (3111) is located between the liquid cooling structure (4) and the inner wall of the box body (1), and the reinforcing member (32) is arranged in the first installation cavity (3111).

2. The battery pack according to claim 1, characterized in that: The battery pack (2) comprises a battery cell (21); The liquid cooling structure (4) comprises a current collecting member (41) and a liquid cooling plate (42); along the first direction (Y), the current collecting member (41) is located between the battery cell (21) and the inner wall of the box body (1); the liquid cooling plate (42) is connected to the current collecting member (41) and to the side surface of the battery cell (21).

3. The battery pack according to claim 2, characterized in that: The battery pack also has a second direction (X) intersecting with the first direction (Y), the thickness direction of the liquid cooling plate (42) is perpendicular to the thickness direction of the box body (1), and the energy absorbing member (31) extends along the second direction (X).

4. The battery pack according to claim 2, characterized in that: A second installation cavity (3112) for accommodating the current collecting member (41) is provided inside the main body (311), and a connecting port (3113) communicating with the second installation cavity (3112) is provided in the main body (311), and the liquid cooling plate (42) is connected to the current collecting member (41) via the connecting port (3113); along the first direction (Y), the second installation cavity (3112) is located between the battery pack (2) and the first installation cavity (3111).

5. The battery pack according to claim 3, characterized in that: The reinforcement member (32) extends along the second direction (X), and the reinforcement member (32) is provided with a through hole (321) penetrating along the first direction (Y).

6. The battery pack according to claim 5, characterized in that: The energy absorbing member (31) further comprises a connecting portion (312) disposed in the first installation cavity (3111); along the first direction (Y), at least one end of the connecting portion (312) is connected to an inner wall of the first installation cavity (3111), and at least a portion of the connecting portion (312) is disposed in the through hole (321).

7. The battery pack according to claim 5, characterized in that: There are a plurality of through holes (321), and the plurality of through holes (321) are distributed along the second direction (X).

8. The battery pack according to any one of claims 1 to 7, characterized in that: Along the first direction (Y), the main body (311) is provided with a groove (3114) which is recessed toward one end of the battery pack (2) and away from the battery pack (2), and at least a portion of the battery pack (2) is disposed in the groove (3114).

9. The battery pack according to any one of claims 2 to 7, characterized in that: There are a plurality of liquid cooling plates (42), and an accommodation space (421) for accommodating the battery pack (2) is formed between two adjacent liquid cooling plates (42).

10. An electrical device, characterized in that: Comprising a battery pack according to any one of claims 1-9.

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