Battery pack and electric device

Abstract

The utility model relates to the technical field of batteries, and discloses a battery pack and an electric device, the battery pack comprises a box body, a connecting group and a battery pack; the box body comprises a bottom plate and a frame, and a containing groove is defined by the frame and the bottom plate; the connecting group is arranged in the accommodating groove, the connecting group comprises a plurality of liquid cooling pieces which are arranged along a first direction, and each liquid cooling piece is provided with a supporting surface which is obliquely arranged relative to the first direction; the battery pack comprises a plurality of single batteries arranged along the first direction, and the bottom surfaces of the single batteries are attached to and connected with the supporting surface; according to the battery pack provided by the utility model, the supporting surface which is inclined relative to the first direction is arranged on the liquid cooling piece, so that the plurality of single batteries in the battery pack can be obliquely arranged along the first direction, and the oblique arrangement can disperse the superposition of expansion force of the plurality of single batteries in the battery pack and reduce the impact capacity borne by the single batteries; and the bending deformation degree of the single battery is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery pack and electric device. BACKGROUND

[0002] At present, the multiple single batteries in the battery pack in the market are mostly arranged in the positive horizontal positive row, positive vertical positive row, inverted horizontal positive row and inverted vertical positive row and other positive arrangement modes. The contact area of the adjacent two single batteries in the battery pack arranged in the positive arrangement mode is large, which causes the multiple single batteries in the battery pack to concentrate the superposition of the swelling force when the battery pack is subjected to extrusion and collision and other problems, thereby causing the single battery to bear more impact energy and improving the degree of bending deformation of the single battery. SUMMARY

[0003] The utility model aims at at least solving one of the technical problems existing in the prior art, and provides a battery pack and an electric device with the battery pack, wherein the battery pack can reduce the degree of bending deformation of the single battery.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a battery pack with intersecting first direction, second direction and third direction, the battery pack includes box body, connecting group and battery group, the box body includes mutually connected bottom plate and frame, the frame surrounds the bottom plate, and the frame and the bottom plate enclose a containing groove, the connecting group is arranged in the containing groove, the connecting group includes a plurality of liquid cooling pieces arranged along the first direction, the liquid cooling piece is connected to the bottom plate, the liquid cooling piece has a first heat conduction wall, the first heat conduction wall has a support surface which is arranged obliquely relative to the first direction, along the third direction, the connecting group is arranged between the bottom plate and the battery group, the battery group includes a plurality of single batteries arranged along the first direction, the single battery has a bottom surface, and the bottom surface is connected to the support surface in a matched mode.

[0005] In some embodiments, the support surface and the first direction intersect and form an included angle a, which satisfies: 0° < a ≤ 45°.

[0006] In some embodiments, the single battery has opposite first and second side surfaces in the first direction, the liquid cooling piece further includes a second heat conduction wall, a first side wall, a bottom wall and a second side wall, the first heat conduction wall, the second heat conduction wall, the first side wall, the bottom wall and the second side wall are connected in sequence and enclose a liquid cooling flow channel, the bottom wall is connected to the bottom plate, the second heat conduction wall has a positioning surface for abutting the second side surface, and the bottom wall is connected to the bottom plate.

[0007] In some embodiments, along the first direction, two adjacent liquid cooling components are a first liquid cooling component and a second liquid cooling component, and two adjacent single cells are a first single cell and a second single cell. The first single cell is connected to the first liquid cooling component, and the second single cell is connected to the second liquid cooling component. The second sidewall of the first liquid cooling component is attached to the first sidewall of the second liquid cooling component, and the second sidewall of the first single cell is attached to the first sidewall of the second single cell and the positioning surface of the second liquid cooling component.

[0008] In some embodiments, the battery pack further includes a current collector connected to one end of the connection group in the second direction, the current collector having a current collection channel that communicates with the liquid cooling channels of at least two of the liquid cooling components.

[0009] In some embodiments, the flow channel includes a plurality of flow chambers communicating along the first direction; the flow collector has an opening at one end in the second direction that communicates with the flow chamber, and the liquid cooling component is inserted into the flow chamber through the opening at one end in the second direction, thereby connecting the liquid cooling channel and the flow chamber.

[0010] In some embodiments, the flow collection cavity has a first inner wall surface and a second inner wall surface, the second inner wall surface being connected to one end of the first inner wall surface in the first direction, the first inner wall surface being attached to the first heat-conducting wall, and the second inner wall surface being attached to the second heat-conducting wall.

[0011] In some embodiments, the battery pack further includes a limiting component disposed within the receiving groove. The limiting component includes a first limiting member and a second limiting member. The first limiting member is connected to the base plate and located on one side of the battery pack in the first direction, and the second limiting member is connected to the base plate and located on the side of the battery pack opposite to the first limiting member in the first direction.

[0012] In some embodiments, along the first direction, the battery pack has opposing first end faces and second end faces; the first limiting member has a first limiting surface facing the first end face and abutting the first end face in the first direction; the second limiting member has a second limiting surface facing the second end face and abutting the second end face in the first direction.

[0013] The present invention also provides an electrical device, the electrical device comprising a battery pack according to any one of the preceding claims.

[0014] Compared with the prior art, the beneficial effects of this utility model embodiment of a battery pack are as follows: (1) By setting a support surface that is inclined relative to the first direction on the liquid cooling component and attaching the bottom surface of the individual battery to the support surface, the individual battery can be inclined relative to the first direction, so that multiple individual batteries in the battery pack can be arranged inclined along the first direction. The inclined arrangement can reduce the contact area between two adjacent individual batteries, so that when the battery pack is subjected to external pressure and collision, the superposition of the expansion force of multiple individual batteries in the battery pack can be dispersed, the impact capacity of the individual battery can be reduced, and the degree of bending deformation of the individual battery can be reduced.

[0015] (2) By placing the connecting group between the base plate and the battery pack, the impact force transmitted from the base plate to the battery pack can also be mitigated through the connecting group, thereby improving the bottom impact resistance of the battery pack.

[0016] (3) By attaching the support surface of the first heat-conducting wall to the bottom surface of the single cell, the coolant in the liquid cooling component can exchange heat with the single cell through the first heat-conducting wall, thereby controlling the temperature of the single cell within a suitable working range through the liquid cooling component, ensuring the normal operation of the single cell. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a battery pack provided in an embodiment of the present invention;

[0018] Figure 2 This is a front view of a battery pack provided in an embodiment of the present utility model;

[0019] Figure 3 This is a top view of a battery pack provided in an embodiment of the present utility model;

[0020] Figure 4 This is an exploded view of a battery pack provided in an embodiment of the present invention;

[0021] Figure 5 This is a front view of the liquid cooling component provided in this embodiment of the utility model;

[0022] Figure 6 This is a schematic diagram showing the intersection of the support surface and the first direction to form an included angle α, provided in an embodiment of this utility model.

[0023] Figure 7 This is a schematic diagram of the current collector provided in an embodiment of the present utility model;

[0024] Figure 8 This is a schematic diagram showing the connection group, battery pack, and current collector provided in an embodiment of this utility model;

[0025] Figure 9This is a schematic diagram showing the combination of two liquid cooling components and two individual batteries provided in this embodiment of the utility model.

[0026] In the diagram, 1 is the enclosure; 11 is the base plate; 12 is the frame; 13 is the receiving slot; 131 is the storage area; and 132 is the electrical area.

[0027] 2. Connecting assembly; 21. Liquid cooling component; 21A. First liquid cooling component; 21B. Second liquid cooling component; 211. Liquid cooling channel; 2111. First heat-conducting wall; 2112. Second heat-conducting wall; 2113. First side wall; 2114. Bottom wall; 2115. Second side wall; 21111. Support surface; 21121. Positioning surface;

[0028] 3. Battery pack; 31. Individual cell; 31A. First individual cell; 31B. Second individual cell; 301. First end face; 302. Second end face; 311. First side face; 312. Second side face; 313. Bottom face;

[0029] 4. Flow collector; 41. Flow collector channel; 411. Flow collector cavity; 4111. First inner wall surface; 4112. Second inner wall surface;

[0030] 5. Limiting component; 51. First limiting member; 52. Second limiting member; 511. First limiting surface; 512. Second limiting surface;

[0031] X, first direction; Y, second direction; Z, third direction. Detailed Implementation

[0032] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0033] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0034] 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between 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.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having" and any variations thereof in the description, claims and foregoing drawings of this application are intended to cover non-exclusive inclusion.

[0038] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0039] like Figures 1-9 As shown, a preferred embodiment of the present invention provides a battery pack having intersecting first direction X, second direction Y, and third direction Z. The battery pack includes a housing 1, a connecting group 2, and a battery pack 3.

[0040] The housing 1 includes a bottom plate 11 and a frame 12 connected to each other. The frame 12 surrounds the bottom plate 11, and the frame 12 and the bottom plate 11 form a receiving groove 13. The connecting group 2 is disposed in the receiving groove 13. The connecting group 2 includes a plurality of liquid cooling components 21 arranged along the first direction X. The liquid cooling components 21 are connected to the bottom plate 11. The liquid cooling components 21 have a first heat-conducting wall 2111. The first heat-conducting wall 2111 has a support surface 21111 that is inclined relative to the first direction X. Along the third direction Z, the connecting group 2 is disposed between the bottom plate 11 and the battery pack 3. The battery pack 3 includes a plurality of individual cells 31 arranged along the first direction X. The individual cells 31 have a bottom surface 313, and the bottom surface 313 is attached to the support surface 21111.

[0041] Based on this technical solution, by setting a support surface 21111 on the liquid cooling component 21 that is inclined relative to the first direction X, and attaching the bottom surface 313 of the individual battery 31 to the support surface 21111, the individual battery 31 can be inclined relative to the first direction X. This allows multiple individual batteries 31 in the battery pack 3 to be arranged inclined along the first direction X. The inclined arrangement can reduce the contact area between two adjacent individual batteries 31, thereby dispersing the superposition of expansion forces of multiple individual batteries 31 in the battery pack 3 when the battery pack is subjected to external pressure and collisions, reducing the impact capacity borne by the individual battery 31, and reducing the degree of bending deformation of the individual battery 31. At the same time, by setting the connecting group 2 between the base plate 11 and the battery pack 3, the impact force transmitted from the base plate 11 to the battery pack 3 can also be alleviated through the connecting group 2, improving the impact resistance of the bottom of the battery pack 3.

[0042] By attaching the support surface 21111 of the first heat-conducting wall 2111 to the bottom surface 313 of the single cell 31, the coolant in the liquid cooling component 21 can exchange heat with the single cell 31 through the first heat-conducting wall 2111, thereby controlling the temperature of the single cell 31 within a suitable operating range through the liquid cooling component 21, ensuring the normal operation of the single cell 31.

[0043] The individual battery 31 is tilted relative to the first direction X, which can increase the creepage distance of the battery and improve the electrical safety of the individual battery 31.

[0044] By arranging multiple individual cells 31 in the battery pack 3 at an angle along the first direction X, in the event of thermal runaway, the extra space between the upper parts of two adjacent individual cells 31 due to the angle of inclination can serve as an exhaust channel for heat diffusion, thus improving safety.

[0045] In this embodiment, the receiving slot 13 is provided with six battery packs 3 arranged along the second direction Y, and each battery pack 3 includes twelve individual batteries 31 arranged along the first direction X. In other embodiments, the number of battery packs 3 and the number of individual batteries 31 in each battery pack 3 can be flexibly increased or decreased, which will not be elaborated here.

[0046] In this embodiment, the connection group 2 includes twelve liquid cooling components 21 arranged along the first direction X, and each liquid cooling component 21 is connected to six individual batteries 31 arranged along the second direction Y (the six individual batteries 31 correspond to six battery packs 3 respectively); in other embodiments, the number of liquid cooling components 21 in each connection group 2 can be flexibly increased or decreased, and the number of individual batteries 31 in each liquid cooling component 21 can also be flexibly increased or decreased, which will not be elaborated here.

[0047] See Figures 1-4 The battery pack also includes a limiting component 5, which is disposed within the receiving groove 13. The limiting component 5 includes a first limiting member 51 and a second limiting member 52. The first limiting member 51 is connected to the base plate 11 and located on one side of the battery pack 3 in the first direction X. The second limiting member 52 is connected to the base plate 11 and located on the side of the battery pack 3 opposite to the first limiting member 51 in the first direction X. In this way, the battery pack 3 can be limited and fixed in the first direction X by the first limiting member 51 and the second limiting member 52, ensuring the stability of the battery pack 3.

[0048] A receiving area 131 is defined between the first limiting member 51, the frame 12, and the second limiting member 52, and the battery pack 3 is disposed within the receiving area 131; an electrical area 132 located on one side of the receiving area 131 is defined between the first limiting member 51 and the frame 12.

[0049] Along the first direction X, the battery pack 3 has a first end face 301 and a second end face 302 facing each other; the first limiting member 51 has a first limiting surface 511 facing the first end face 301 and fitting against the first end face 301 in the first direction X; the second limiting member 52 has a second limiting surface 512 facing the second end face 302 and fitting against the second end face 302 in the first direction X. In this way, the battery pack 3 can be better limited and fixed in the first direction X by the first limiting surface 511 and the second limiting surface 512, so that the multiple individual cells 31 in the battery pack 3 can be arranged more closely, thereby preventing any individual cell 31 in the battery pack 3 from shifting or shaking in the housing 1, thereby reducing the mutual collision and friction between two adjacent individual cells 31, thus protecting the individual cells 31 from damage and improving the safety and reliability of the battery pack.

[0050] Using a tooling fixture, multiple individual batteries 31 are arranged on the outside of the battery pack according to their internal distribution to form a battery pack 3. The battery pack 3 is then sucked into a box using the tooling fixture. Since the first limiting surface 511 and the second limiting surface 512 are respectively attached to the first end face 301 and the second end face 302 of the battery pack 3, the first limiting surface 511 and the second limiting surface 512 can help position the battery pack 3 during the process of sucking it into the box, making it easier to align and fix the battery pack 3 in the box, reducing the assembly difficulty of the battery pack and improving production efficiency.

[0051] See Figure 6 The supporting surface 21111 intersects with the first direction X, forming an angle α, satisfying: 0° < α ≤ 45°. This allows the tilt angle of the individual battery 31 to be controlled within a range greater than 0° and less than or equal to 45°. Thus, while the individual battery 31 remains tilted, the stability of the fixation between the individual battery 31 and the liquid cooling component 21 is ensured, preventing a decrease in the stability of the connection between the bottom surface 313 of the individual battery 31 and the supporting surface 21111 of the liquid cooling component 21 due to an excessively large tilt angle. It also reduces the space occupied inside the battery pack housing due to an excessively large tilt angle, helping to accommodate as many individual batteries 31 as possible within the receiving slot 13, thus ensuring the energy output of the entire battery pack.

[0052] See Figures 1-6 ,and Figures 8-9 The single cell 31 has a first side 311 and a second side 312 opposite each other in the first direction X.

[0053] The liquid cooling component 21 also includes a second heat-conducting wall 2112, a first side wall 2113, a bottom wall 2114, and a second side wall 2115; the first heat-conducting wall 2111, the second heat-conducting wall 2112, the first side wall 2113, the bottom wall 2114, and the second side wall 2115 are connected in sequence and form a liquid cooling channel 211 for the flow of coolant. The second heat-conducting wall 2112 has a positioning surface 21121 for fitting the second side wall 312, and the bottom wall 2114 is connected to the base plate 11. Because the supporting surface 21111 is in contact with the bottom surface 313 of the single cell 31, and the positioning surface 21121 is in contact with the second side surface 312 of the single cell 31, the coolant in the liquid cooling channel 211 can exchange heat with the single cell 31 through both the first heat-conducting wall 2111 and the second heat-conducting wall 2112. This increases the heat exchange area between the liquid cooling component 21 and the single cell 31, improving the liquid cooling effect of the single cell 31. Simultaneously, the second heat-conducting wall 2112 can also limit the position of the single cell 31, facilitating accurate positioning and quick and convenient installation of the single cell 31 on the liquid cooling component 21. Furthermore, by creating the liquid cooling channel 211 in the liquid cooling component 21, even if the impact force transmitted from the base plate 11 to the bottom of the liquid cooling component 21 is large, the coolant in the liquid cooling channel 211 can effectively disperse the bottom impact force, mitigating damage to the single cell 31.

[0054] See Figures 1-7 The battery pack also includes a current collector 4, which is connected to one end of the connecting group 2 in the second direction Y. The current collector 4 has a current collection channel 41, which is connected to the liquid cooling channels 211 of at least two liquid cooling components 21. The current collection channel 41 can evenly distribute the coolant to the liquid cooling channels 211 of multiple liquid cooling components 21, which helps to ensure that each liquid cooling channel 211 of the liquid cooling component 21 receives sufficient coolant flow and achieves effective thermal management.

[0055] The flow channel 41 includes a plurality of flow chambers 411 communicating along the first direction X; the flow collector 4 has an opening at one end in the second direction Y that communicates with the flow chamber 411, and the liquid cooling component 21 is inserted into the flow chamber 411 through the opening at one end in the second direction Y, thus connecting the liquid cooling channel 211 and the flow chamber 411. By providing an opening on the flow collector 4 for the insertion of the liquid cooling component 21, quick and convenient assembly between the flow collector 4 and the liquid cooling component 21 is facilitated.

[0056] The collecting cavity 411 has a first inner wall surface 4111 and a second inner wall surface 4112. The second inner wall surface 4112 is connected to one end of the first inner wall surface 4111 in the first direction X. The first inner wall surface 4111 is attached to the first heat-conducting wall 2111, and the second inner wall surface 4112 is attached to the second heat-conducting wall 2112. By setting a first inner wall surface 4111 that is in close contact with the first heat-conducting wall 2111 and a second inner wall surface 4112 that is in close contact with the second heat-conducting wall 2112, when the liquid cooling component 21 is inserted into the manifold 411 through the opening, the first inner wall surface 4111 and the second inner wall surface 4112 will not interfere with the insertion action of the liquid cooling component 21, which helps to further improve the speed and convenience of assembling the manifold 4 and the liquid cooling component 21; at the same time, since the first inner wall surface 4111 is in close contact with the first heat-conducting wall 2111 and the second inner wall surface 4112 is in close contact with the second heat-conducting wall 2112, the shape of the manifold 411 can be made closer to the shape of the liquid cooling channel 211, thus optimizing the flow of coolant in the manifold 411 and the liquid cooling channel 211.

[0057] See Figures 1-5 ,and Figures 8-9 Along the first direction X, two adjacent liquid cooling components 21 are designated as first liquid cooling component 21A and second liquid cooling component 21B, and two adjacent single cells 31 are designated as first single cell 31A and second single cell 31B. The first single cell 31A is connected to the first liquid cooling component 21A, and the second single cell 31B is connected to the second liquid cooling component 21B. The second sidewall 2115 of the first liquid cooling component 21A is attached to the first sidewall 2113 of the second liquid cooling component 21B, and the second sidewall 312 of the first single cell 31A is attached to the first sidewall 311 of the second single cell 31B and the positioning surface 21121 of the second liquid cooling component 21B. This improves the neatness of the inclined arrangement of the single cells 31 within the receiving slot 13, allowing multiple single cells 31 in the battery pack 3 to be arranged closely, increasing the capacity of the single cells 31 within the receiving slot 13, and thus helping to accommodate as many single cells 31 as possible within the receiving slot 13, ensuring the energy output of the entire battery pack.

[0058] It is understandable that naming two adjacent liquid cooling components 21 arranged along the first direction X as first liquid cooling component 21A and second liquid cooling component 21B is to facilitate the distinction between two adjacent liquid cooling components 21; naming two adjacent single cells 31 arranged along the first direction X as first single cell 31A and second single cell 31B is to facilitate the distinction between two adjacent single cells 31.

[0059] The first single cell 31A and the second single cell 31B can be single cells 31 of the same model or single cells 31 of different models.

[0060] The present invention also provides an electrical device, which includes a battery pack according to any of the above claims.

[0061] The electrical device includes the aforementioned battery pack. This electrical device may include, but is not limited to, electronic devices, energy storage devices, and electric vehicles. It is understood that the electrical device may possess all the technical features and corresponding beneficial effects of the aforementioned battery pack, which will not be elaborated upon here.

[0062] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A battery pack having a first direction (X), a second direction (Y), and a third direction (Z) intersecting, characterized by, The application relates to a battery pack, comprising: a box body (1) comprising a bottom plate (11) and a frame (12) connected to each other, the frame (12) surrounding the bottom plate (11), and the frame (12) and the bottom plate (11) forming a containing groove (13); a connecting group (2) arranged in the containing groove (13), the connecting group (2) comprising a plurality of liquid cooling components (21) arranged along a first direction (X), the liquid cooling components (21) being connected to the bottom plate (11), the liquid cooling components (21) having first heat-conducting walls (2111) with support surfaces (21111) arranged obliquely relative to the first direction (X); a battery group (3) arranged between the bottom plate (11) and the battery group (3) along a third direction (Z), the battery group (3) comprising a plurality of single batteries (31) arranged along the first direction (X), the single batteries (31) having bottom surfaces (313) connected to the support surfaces (21111).

2. The battery pack of claim 1, wherein, The support surfaces (21111) and the first direction (X) intersect and form an included angle a, and the following condition is met: 0° < a <= 45°.

3. The battery pack of claim 1, wherein, The single batteries (31) have opposite first side surfaces (311) and second side surfaces (312) in the first direction (X). The liquid cooling components (21) further comprise second heat-conducting walls (2112), first side walls (2113), bottom walls (2114) and second side walls (2115), the first heat-conducting walls (2111), the second heat-conducting walls (2112), the first side walls (2113), the bottom walls (2114) and the second side walls (2115) being sequentially connected and forming liquid cooling flow channels (211); the bottom walls (2114) are connected to the bottom plate (11), the second heat-conducting walls (2112) have positioning surfaces (21121) for abutting the second side surfaces (312), and the bottom walls (2114) are connected to the bottom plate (11).

4. The battery pack of claim 3, wherein, In the first direction (X), two adjacent liquid cooling components (21) are a first liquid cooling component (21A) and a second liquid cooling component (21B), and two adjacent single batteries (31) are a first single battery (31A) and a second single battery (31B), the first single battery (31A) being connected to the first liquid cooling component (21A), and the second single battery (31B) being connected to the second liquid cooling component (21B). The second side wall (2115) of the first liquid cooling component (21A) abuts the first side wall (2113) of the second liquid cooling component (21B), the second side surface (312) of the first single battery (31A) abuts the first side surface (311) of the second single battery (31B) and the positioning surface (21121) of the second liquid cooling component (21B).

5. The battery pack of claim 3, wherein, Further comprising a current collecting piece (4) connected to one end of the connection group (2) in the second direction (Y), the current collecting piece (4) being provided with a current collecting flow channel (41) in communication with the liquid cooling flow channels (211) of the at least two liquid cooling pieces (21).

6. The battery pack of claim 5, wherein, The current collecting flow channel (41) comprises a plurality of current collecting cavities (411) in communication along the first direction (X); The current collecting piece (4) has an opening (42) in communication with the current collecting cavities (411) at one end in the second direction (Y), and the liquid cooling piece (21) is inserted into the current collecting cavities (411) through the opening (42) at one end in the second direction (Y) and makes the liquid cooling flow channels (211) and the current collecting cavities (411) in communication.

7. The battery pack of claim 6, wherein, The current collecting cavities (411) have a first inner wall surface (4111) and a second inner wall surface (4112) connected to one end of the first inner wall surface (4111) in the first direction (X), the first inner wall surface (4111) being attached to the first heat-conducting wall (2111), and the second inner wall surface (4112) being attached to the second heat-conducting wall (2112).

8. The battery pack of any one of claims 1-7, wherein, Further comprising a limiting assembly (5) arranged in the accommodating groove (13), the limiting assembly (5) comprising a first limiting piece (51) and a second limiting piece (52), the first limiting piece (51) being connected to the bottom plate (11) and located on one side of the battery pack (3) in the first direction (X), and the second limiting piece (52) being connected to the bottom plate (11) and located on the side of the battery pack (3) in the first direction (X) away from the first limiting piece (51).

9. The battery pack of claim 8, wherein, In the first direction (X), the battery pack (3) has opposite first and second end faces (301) and (302); The first limiting piece (51) has a first limiting surface (511) in the first direction (X) facing the first end face (301) and attached thereto; The second limiting piece (52) has a second limiting surface (512) in the first direction (X) facing the second end face (302) and attached thereto.

10. An electrical device, characterized by The battery pack comprises the battery pack according to any one of claims 1-9.

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