Battery pack and electric device

Abstract

The application provides a battery pack and an electric device, and relates to the technical field of batteries. The battery pack comprises a tray assembly, a cover body and a battery cell. The tray assembly is provided with an open cavity, and the battery cell is located in the open cavity. The cover body is arranged on the tray assembly to close the open cavity. The battery cell is provided with at least one first connecting part, and at least one second connecting part is arranged on at least one of the tray assembly and the cover body. The second connecting part is detachably connected with the first connecting part to limit the movement of the battery cell relative to the tray assembly or the cover body. According to the battery pack provided in the application, the tray assembly or the cover body can be connected and fixed with the battery cell through the second connecting part and the first connecting part. When disassembly is needed, the connection between the second connecting part and the first connecting part is released, and the battery cell can be separated from the tray assembly or the cover body, so that the battery pack is easy to disassemble and assemble, and is beneficial to maintenance and subsequent stage utilization.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a battery pack and electrical device. Background Technology

[0002] Battery packs, as a power source, are widely used in new energy vehicles or other electrical equipment.

[0003] A battery pack is typically made up of multiple cells connected in series and parallel and then sealed with a tray and a cover. In related technologies, the cells are bonded to the cover or tray to achieve fixation or heat conduction.

[0004] However, the above-mentioned adhesive method is difficult to disassemble, which is not conducive to maintenance and subsequent reuse. Summary of the Invention

[0005] Based on this, this application provides a battery pack and electrical equipment to solve the problem that the bonding method used in the packaging of existing battery packs is difficult to disassemble, which is not conducive to maintenance and subsequent cascade utilization.

[0006] In a first aspect, this application provides a battery pack, including: a tray assembly, a cover, and battery cells;

[0007] The tray assembly has an opening, and the battery cell is located inside the opening;

[0008] The lid is placed on the tray assembly to close the opening;

[0009] The battery cell has at least one first connection portion, and at least one of the tray assembly and the cover has at least one second connection portion. The second connection portion is detachably connected to the first connection portion to restrict the movement of the battery cell relative to the tray assembly or the cover.

[0010] In one possible implementation, the first connecting part is a first plug-in part, and the second connecting part is a second plug-in part that matches the first plug-in part, with the second plug-in part correspondingly plugged into the first plug-in part.

[0011] In one possible implementation, one of the first and second plug-in portions is a plug post, and the other is a plug hole that matches the plug post, with the plug post and plug hole being plugged in accordingly.

[0012] In one possible implementation, the first plug portion is inclined relative to the outer wall of the battery cell to form a first angle with the outer wall of the battery cell.

[0013] In one possible implementation, the first included angle is an acute angle.

[0014] In one possible implementation, the first plug portion is located on the outer wall of the battery cell, and multiple first plug portions are spaced apart on the outer wall of the battery cell, with each first plug portion on the same outer wall having the same tilt direction.

[0015] In one possible implementation, the tilt directions of the opposing first connectors on the battery cell are opposite.

[0016] In one possible implementation, the second connector is located on the battery cell, and the two ends of the first connector are connected to opposite sides of the tray assembly.

[0017] In one possible implementation, the battery cell is rectangular, and the second connector is located on the battery cell near the included angle between two adjacent sides.

[0018] In one possible implementation, at least one of the heat-conducting element, tray assembly, and cover body is in contact with the battery cell via the heat-conducting element.

[0019] In one possible implementation, the heat-conducting component is a thermally conductive silicone sheet with a preset compression deformation.

[0020] In one possible implementation, an insulation element is also included, with an insulation element disposed between the outer wall of at least one cell and the inner wall of the tray assembly.

[0021] In one possible implementation, the pallet assembly includes a base plate and multiple side plates connected in sequence and respectively connected to the same side of the base plate to form an opening, and a cover is connected to the side of each side plate opposite to the base plate.

[0022] In one possible implementation, the base plate is a cold plate.

[0023] Secondly, this application also provides an electrical device, including a device body, the device body being provided with any of the battery packs provided in the first aspect.

[0024] This application provides a battery pack and an electrical device. The battery pack includes a tray assembly, a cover, and battery cells. An opening is provided on the tray assembly, and the battery cells are installed within the opening. The cover is then placed on the tray assembly to close the opening and protect the battery cells. At least one first connecting portion is provided on the battery cell, and at least one second connecting portion is provided on at least one of the tray assembly and the cover. The second connecting portion is detachably connected to the first connecting portion to restrict movement of the battery cells relative to the tray assembly or the cover. Therefore, in the battery pack provided by this application, the tray assembly or cover and the battery cells are connected and fixed through the second connecting portion and the first connecting portion. When disassembly is required, the connection between the second connecting portion and the first connecting portion can be released to separate the battery cells from the tray assembly or the cover, facilitating disassembly and assembly, maintenance, and subsequent reuse. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 An exploded view of the battery pack provided in an embodiment of this application;

[0027] Figure 2 for Figure 1 A schematic diagram showing the installation relationship between the battery cell, the cover, and the tray assembly;

[0028] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0029] Figure 4 for Figure 2 A magnified view of a section at point B in the middle;

[0030] Figure 5 A partially exploded view of another embodiment of the battery pack provided in this application;

[0031] Figure 6 for Figure 5 A partial exploded view of the battery cell.

[0032] Figure label:

[0033] 100: Pallet assembly;

[0034] 101: Base plate;

[0035] 102: Side panel;

[0036] 110: Open the oral cavity;

[0037] 120: Second connecting part;

[0038] 200: Cover;

[0039] 300: Battery cell;

[0040] 310: First connecting part;

[0041] 400: Thermal conductive component;

[0042] 500: Insulation component. Detailed Implementation

[0043] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of methods and apparatus consistent with some aspects of this application as detailed in the appended claims.

[0044] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0045] Currently, battery packs are encapsulated using trays and sealing caps. Cells are grouped and placed in the cavity between the tray and the sealing cap. The sealing cap is bolted to the tray, and the contact surfaces between the cells and the sealing cap or tray are bonded and fixed with structural adhesive or thermally conductive adhesive. Its main disadvantages are: 1. Difficult to disassemble, hindering maintenance and subsequent reuse (reuse, also known as cascaded battery, refers to the downgraded use of batteries; new batteries degrade after a certain period of use and are insufficient to meet the needs of current equipment, but the batteries themselves are not damaged. After some repair and adjustment, they can be used in equipment with lower power requirements, such as energy storage power stations and communication base stations, reducing costs); 2. Bonding quality is related to the flatness of the cell module, tray, and sealing cap. Poor flatness of components leads to poor bonding quality; therefore, high dimensional tolerances are required for components; 3. Excessive adhesive increases the weight of the battery pack, hindering weight reduction; 4. Some adhesives are environmentally unfriendly, potentially becoming a reason for restrictions in certain regions.

[0046] To address the aforementioned problems in the prior art, this application provides a battery pack and an electrical device. The battery pack provided by this application includes a tray assembly, a cover, and battery cells. An opening is provided on the tray assembly, and the battery cells are installed within the opening. The cover is then placed on the tray assembly to close the opening and protect the battery cells. At least one first connecting portion is provided on the battery cell, and at least one second connecting portion is provided on at least one of the tray assembly and the cover. The second connecting portion is detachably connected to the first connecting portion to restrict movement of the battery cells relative to the tray assembly or the cover. That is, the tray assembly or cover and the battery cells are connected and fixed through the second connecting portion and the first connecting portion. When disassembly is required, the connection between the second connecting portion and the first connecting portion can be released, allowing the battery cells to be separated from the tray assembly or the cover. This facilitates easy assembly and disassembly, and is beneficial for maintenance and subsequent reuse.

[0047] The technical solutions of this application will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0048] Firstly, referring to Figures 1-6 As shown in the figure, this application provides a battery pack, including: a tray assembly 100, a cover 200, and a battery cell 300.

[0049] The tray assembly 100 has an opening 110, and the battery cell 300 is located inside the opening 110.

[0050] The cover 200 is placed on the tray assembly 100 to close the opening 110.

[0051] The battery cell 300 is provided with at least one first connection portion 310, and at least one of the tray assembly 100 and the cover 200 is provided with at least one second connection portion 120. The second connection portion 120 is detachably connected to the first connection portion 310 to restrict the movement of the battery cell 300 relative to the tray assembly 100 or the cover 200.

[0052] In this embodiment, the tray assembly 100 is used to support the battery cell 300 and other components. It can be a shell-shaped, frame-shaped or other structure. The tray assembly 100 has an opening 110 inside, which is roughly rectangular. Therefore, multiple battery cells 300 can be placed side by side in the opening 110.

[0053] In this embodiment, the cover 200 is used to close the opening 110. It can be a plate-like structure. The cover 200 can cover the entire opening of the opening 110. The periphery of the cover 200 and the periphery of the tray assembly 100 can be connected by screws, snaps, plugs, etc., to meet the requirement of detachable connection.

[0054] In this embodiment, the battery cell 300 can be a rectangular sheet, plate, or block structure. The battery cell 300 can be placed upright on the tray assembly 100. A first connecting part 310 is provided on the outer side wall of the battery cell 300 facing the tray assembly 100 or the cover 200. Correspondingly, a second connecting part 120 is provided on the inner side wall of the tray assembly 100 or the cover 200 facing the battery cell 300. The second connecting part 120 and the first connecting part 310 are detachably connected to restrict the movement of the battery cell 300 relative to the tray assembly 100 or the cover 200. The second connecting part 120 and the first connecting part 310 can be connected by plug-in connection, snap-fit ​​connection, bolt connection, etc., as long as the detachable connection is met.

[0055] Specifically, such as Figure 1 As shown, one or more battery cells 300 are installed side by side in the opening 110 of the tray assembly 100. The tray assembly 100 and the battery cells 300 can be fixed by corresponding connection between the second connecting part 120 and the first connecting part 310. Then, other necessary parts, such as connecting pieces, insulation pads, brackets, wiring, etc., are installed. Finally, the cover 200 is placed on the tray assembly 100, and after sealing the opening 110, the periphery of the cover 200 is fixed to the periphery of the tray assembly 100.

[0056] It is understandable that, compared to the method of bonding between the tray or sealing cover and the battery cell 300, in the application of the battery pack in this embodiment, the tray assembly 100 or cover 200 and the battery cell 300 can be connected and fixed through the second connecting part 120 and the first connecting part 310 to ensure the normal use of the battery cell 300. When disassembly is required, the connection between the second connecting part 120 and the first connecting part 310 can be released to separate the battery cell 300 from the tray assembly 100 or cover 200. This makes disassembly and assembly easy and is beneficial for maintenance and subsequent cascade utilization.

[0057] Therefore, the battery pack provided in this embodiment includes a tray assembly 100, a cover 200, and a battery cell 300. By providing an opening 110 on the tray assembly 100, the battery cell 300 is installed within the opening 110, and the cover 200 is placed on the tray assembly 100 to close the opening 110 and protect the battery cell. Specifically, by providing at least one first connecting portion 310 on the battery cell 300, and at least one second connecting portion 120 on at least one of the tray assembly 100 and the cover 200, the second connecting portion 120 is detachably connected to the first connecting portion 310 to restrict movement of the battery cell 300 relative to the tray assembly 100 or the cover 200. That is, the tray assembly 100 or cover 200 can be connected and fixed to the battery cell 300 through the second connecting part 120 and the first connecting part 310. When disassembly is required, the connection between the second connecting part 120 and the first connecting part 310 can be released to separate the battery cell 300 from the tray assembly 100 or cover 200. This makes disassembly and assembly easy and is beneficial for maintenance and subsequent reuse.

[0058] In one possible design, the first connecting part 310 is a first plug-in part, and the second connecting part 120 is a second plug-in part that matches the first plug-in part, and the second plug-in part is plugged into the first plug-in part accordingly.

[0059] This design, compared to screw connections, allows for quick assembly and disassembly, facilitating disassembly and maintenance.

[0060] For example, in this embodiment, one of the first plug-in portion and the second plug-in portion is a plug-in post, and the other is a plug-in hole that matches the plug-in post. The plug-in post and the plug-in hole are plugged in accordingly.

[0061] In one example, such as Figures 2-4 As shown, the first plug part is a plug post, and correspondingly, the second plug part has a plug hole that matches the plug post, so as to realize the plug post and the plug hole are plugged in accordingly.

[0062] In another example (not shown in the figure), the first insertion part can also be a insertion hole. Correspondingly, the second insertion part has a matching insertion post, thereby enabling the insertion post to be inserted into the corresponding insertion hole. The insertion type, size, and position of the first and second insertion parts can be determined according to actual needs, as long as they can be fixed and easily disassembled. No specific limitations are made in this embodiment.

[0063] In some embodiments, the first plug portion is inclined relative to the outer side wall of the battery cell 300 to form a first included angle θ with the outer side wall of the battery cell 300, wherein the first included angle θ is an acute angle.

[0064] That is, such as Figures 2-4As shown, the first plug-in part can be a plug-in post, and the plug-in post is not perpendicular to the outer wall of the battery cell 300, but is inclined relative to the outer wall of the battery cell 300 and is barbed. When the plug-in post is located on the outer wall of the battery cell 300, the length of the plug-in post can be 2mm to 4mm. The plug-in post and the outer wall of the battery cell 300 form a first angle θ, and the range of the first angle θ can be 15° to 25°.

[0065] In this way, such as Figures 2-4 As shown, after the plug-in post is plugged into the plug-in hole, the battery cell 300 can be tightened to the tray assembly 100 or the cover 200 by the cooperation of the inclined plug-in post and the plug-in hole. As long as it is ensured that it does not move along the extension direction of the plug-in post, it is not easy to separate the battery cell 300 from the tray assembly 100 or the cover 200, thus ensuring its firmness.

[0066] It should be noted that during installation or removal, the plug can be inserted into or pulled out of the socket simply by moving it along the extension direction of the plug. The installation and removal are simple and convenient.

[0067] The specific first included angle θ and length of the first plug-in part can be determined according to actual needs, and are not specifically limited in this embodiment.

[0068] Furthermore, in this embodiment, the first plug-in portion is located on the outer side wall of the battery cell 300, and a plurality of first plug-in portions are spaced apart on the outer side wall of the battery cell 300, with each first plug-in portion on the same outer side wall having the same inclination direction.

[0069] Specifically, such as Figures 2-4 As shown, the first insertion part is a insertion post, which can be set on the surface of the battery cell 300 consisting of its length and thickness, and multiple posts can be spaced apart along the length of the battery cell 300. In this way, the battery cell 300 is tightened with the tray assembly 100 or the cover 200 at various points, resulting in a more balanced force distribution.

[0070] The plug-in posts can be connected to the battery cell 300 by means of integral molding or welding. The specific number, length, spacing, etc. can be determined according to actual needs, and no specific limitation is made in this embodiment.

[0071] Furthermore, in this embodiment, the tilting directions of the opposite first plug portions on the battery cell 300 are opposite.

[0072] That is, the inclination directions of the plugs on the two outer side walls of the battery cell 300 are opposite. In this way, the direction in which the battery cell 300 moves out of the tray assembly 100 is opposite to the direction in which the battery cell 300 moves out of the cover 200, which plays a mutual restraining role, ensuring that the battery cell 300 will not separate from the tray assembly 100 and the cover 200, and the fastening is better.

[0073] In other embodiments, the second connector is located on the cell 300, and the two ends of the first connector are connected to opposite sides of the tray assembly 100.

[0074] Specifically, such as Figure 5 As shown, the second plug-in part can be a plug-in hole, which is located on the battery cell 300. The first plug-in part is a plug-in post, which can be inserted into the plug-in holes on each battery cell 300 in sequence, such as along the thickness direction of the battery cell 300. The two ends of the plug-in post can be fixedly connected to the opposite sides of the tray assembly 100 by plugging, screwing or other means.

[0075] In this way, one or more battery cells 300 can be fixedly connected to the tray assembly 100 via the plug-in post. The specific position and size of the second plug-in part on the battery cell 300 can be determined according to actual needs, and no specific limitation is made in this embodiment.

[0076] For example, in this embodiment, the battery cell 300 is cuboid in shape, and the second plug-in portion is disposed on the battery cell 300 near the included angle of the two adjacent sides.

[0077] Specifically, the battery cell 300 is rectangular, like a blade battery. The second connector is a connector hole, located near the four corners of the battery cell 300. This minimizes its impact on the internal structure of the battery cell 300 and provides better and more stable fastening. For example, as... Figure 6 As shown, notches are left at the four corners of the battery cell 300, and the insertion holes can be opened on the connecting block. The connecting block is installed at the notch and can be connected to the battery cell 300 by welding, snap-fitting, or other methods, which facilitates processing.

[0078] In some embodiments, a heat-conducting element 400 is also included, and at least one of the tray assembly 100 and the cover 200 abuts against the battery cell 300 via the heat-conducting element 400.

[0079] This design, using thermally conductive component 400 instead of traditional thermal adhesive, not only provides heat conduction but also facilitates subsequent non-destructive disassembly. Figure 1 As shown, both the tray assembly 100 and the cover 200 abut against the battery cell 300 via the heat-conducting component 400.

[0080] For example, the heat-conducting component 400 is a heat-conducting silicone sheet with a preset compression deformation amount.

[0081] Among them, the thermally conductive silicone pad has the characteristics of compressibility, high thermal conductivity and environmental friendliness. When the thermally conductive silicone pad is installed between the battery cell 300 and the tray assembly 100 or the cover 200, a through hole can be opened corresponding to the position of the plug post.

[0082] Moreover, the thermally conductive silicone pad has a preset compression deformation amount, that is, when it is installed between the battery cell 300 and the tray assembly 100 or the cover 200, the battery cell 300 and the tray assembly 100 compress the thermally conductive silicone pad, or the battery cell 300 and the cover 200 compress the thermally conductive silicone pad, making the contact tighter and the thermal conductivity better.

[0083] The thermally conductive silicone sheet can be made of a single piece or spliced ​​from multiple pieces. Its specific thickness and preset compression deformation can be determined according to actual needs, and no specific limitations are made in this embodiment.

[0084] Furthermore, in this embodiment, a heat insulation element 500 is also included, and a heat insulation element 500 is disposed between the outer wall of at least one battery cell 300 and the inner wall of the tray assembly 100.

[0085] Specifically, such as Figure 1 As shown, the insulation component 500 serves to insulate heat. It can be an insulation board with the same area as the side area of ​​the battery cell 300. At least the outermost battery cell 300 is filled with the inner wall of the tray assembly 100 by the insulation component 500. While providing heat insulation, it can also absorb the assembly tolerance of the battery cell 300.

[0086] It should be noted that insulation components 500 are usually not installed on one or both ends of the battery cell 300 with the pole, so as not to affect the layout of wiring and other components.

[0087] Optionally, in this embodiment, the tray assembly 100 includes a base plate 101 and a plurality of side plates 102, each side plate 102 being connected in sequence and respectively connected to the same side of the base plate 101 to form an opening 110, and a cover 200 being connected to the side of each side plate 102 facing away from the base plate 101.

[0088] Specifically, such as Figure 1 As shown, a rectangular frame structure is formed by four side plates 102 connected in sequence, and each side plate 102 can be connected to the same side of the base plate 101 by means of screwing, snap-fitting, or plugging, thereby forming an opening 110 for the installation of the battery cell 300. In addition, the cover 200 can also be connected to the side of each side plate 102 away from the base plate 101 by means of screwing, snap-fitting, or plugging, thereby closing the opening of the opening 110.

[0089] It can also be formed by a greater number of side plates 102, and the side plates 102 can be hollow structures with reinforcing ribs inside, which can be determined according to actual needs. In this embodiment, no specific limitation is made.

[0090] In some embodiments, the base plate 101 is a cold plate.

[0091] In this way, such as Figure 2As shown, the cold plate can cool or heat the battery cell 300 to ensure that it works within a relatively ideal temperature range. The cold plate has flow channels with a flowable fluid medium inside, through which heat is transferred.

[0092] Of course, the base plate 101 can also be replaced by other types of cooling components, depending on actual needs. This embodiment does not impose specific limitations.

[0093] Secondly, embodiments of this application also provide an electrical device, including a device body, on which a battery pack provided in any of the above embodiments is disposed.

[0094] The structure of the battery pack has been described in detail in the above embodiments, and will not be repeated here.

[0095] The electrical equipment mentioned here can be vehicles, communication base stations, energy storage power stations, etc. The equipment body of these electrical equipment can be connected to the battery pack by means of screws, snaps, etc., and the equipment body is also electrically connected to the battery pack so that the electrical equipment can use power when necessary.

[0096] The electrical device provided in this application embodiment includes a battery pack comprising a tray assembly 100, a cover 200, and battery cells 300. An opening 110 is provided on the tray assembly 100, the battery cells 300 are installed within the opening 110, and the cover 200 is placed on the tray assembly 100 to close the opening 110 and protect the battery cells. At least one first connecting portion 310 is provided on the battery cells 300, and at least one second connecting portion 120 is provided on at least one of the tray assembly 100 and the cover 200. The second connecting portion 120 is detachably connected to the first connecting portion 310 to restrict movement of the battery cells 300 relative to the tray assembly 100 or the cover 200. That is, the tray assembly 100 or cover 200 can be connected and fixed to the battery cell 300 through the second connecting part 120 and the first connecting part 310. When disassembly is required, the connection between the second connecting part 120 and the first connecting part 310 can be released to separate the battery cell 300 from the tray assembly 100 or cover 200. This makes disassembly and assembly easy and is beneficial for maintenance and subsequent reuse.

[0097] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims.

[0098] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A battery pack, characterized in that, include: Tray assembly (100), cover (200), and battery cell (300); The tray assembly (100) is provided with an opening (110), and the battery cell (300) is located inside the opening (110); The cover (200) is placed over the tray assembly (100) to close the opening (110). The battery cell (300) is provided with at least one first connecting portion (310), and at least one of the tray assembly (100) and the cover (200) is provided with at least one second connecting portion (120). The second connecting portion (120) is detachably connected to the first connecting portion (310) to restrict the movement of the battery cell (300) relative to the tray assembly (100) or the cover (200). The first connecting part (310) is a first plug-in part, which is inclined relative to the outer side wall of the battery cell (300) to form a first included angle with the outer side wall of the battery cell (300); The first plug-in portion is located on the outer side wall of the battery cell (300). A plurality of first plug-in portions are spaced apart on the outer side wall of the battery cell (300), and the inclination direction of each first plug-in portion on the same outer side wall is the same. The tilting directions of the opposite first plug portion on the battery cell (300) are opposite.

2. The battery pack according to claim 1, characterized in that, The second connecting part (120) is a second plug-in part that matches the first plug-in part, and the second plug-in part is plugged into the first plug-in part.

3. The battery pack according to claim 2, characterized in that, One of the first plug-in portion and the second plug-in portion is a plug-in post, and the other is a plug-in hole that matches the plug-in post. The plug-in post and the plug-in hole are plugged in accordingly.

4. The battery pack according to claim 1, characterized in that, The first included angle is an acute angle.

5. The battery pack according to claim 2, characterized in that, The second plug portion is located on the battery cell (300), and the two ends of the first plug portion are connected to opposite sides on the tray assembly (100).

6. The battery pack according to claim 5, characterized in that, The battery cell (300) is rectangular, and the second plug-in portion is located on the battery cell (300) near the included angle of the two adjacent sides.

7. The battery pack according to any one of claims 1 to 6, characterized in that, It also includes a heat-conducting element (400), through which at least one of the tray assembly (100) and the cover (200) abuts against the battery cell (300).

8. The battery pack according to claim 7, characterized in that, The heat-conducting component (400) is a heat-conducting silicone sheet, which has a preset compression deformation amount.

9. The battery pack according to any one of claims 1 to 6, characterized in that, It also includes an insulation element (500), which is disposed between the outer wall of at least one of the battery cells (300) and the inner wall of the tray assembly (100).

10. The battery pack according to any one of claims 1 to 6, characterized in that, The tray assembly (100) includes a base plate (101) and a plurality of side plates (102), each of the side plates (102) being connected in sequence and respectively connected to the same side of the base plate (101) to form the opening (110), and the cover (200) being connected to the side of each of the side plates (102) facing away from the base plate (101).

11. The battery pack according to claim 10, characterized in that, The base plate (101) is a cold plate.

12. An electrical appliance, characterized in that, It includes a device body, on which a battery pack as described in any one of claims 1 to 11 is disposed.

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