Battery pack and electric equipment

Abstract

The utility model relates to the technical field of power supply, in particular to a battery pack and electric equipment. The battery pack comprises a shell, a battery cell module, a first cover body, a second cover body and a first fastener, the shell comprises a first space and an opening communicated with the first space, the shell comprises two first side walls which are oppositely arranged in the second direction, and each first side wall is provided with a first concave part; the battery cell module is arranged in the first space; the first cover body and the battery cell module are fixed, the battery cell module and the first cover body are arranged in the first direction, the first cover body is provided with a first convex part, and at least part of the first convex part is placed in the first concave part; the second cover body is arranged on one side, far away from the battery cell module, of the first cover body; the second cover body covers the opening; through the mode, alignment between the first cover body and the shell can be assisted, the installation difficulty of the first cover body is reduced, the alignment efficiency is improved, and the problem that the battery pack is damaged when the first cover body is installed is solved.

Description

Technical Field

[0001] The present application relates to the field of power supply technology, and in particular to a battery pack and electrical equipment. Background Art

[0002] A conventional battery casing comprises a shell with an opening at one end and a cover. A cavity is provided in the shell to accommodate a battery cell or a battery cell module. The cover seals the opening of the shell so that the battery casing is entirely disposed outside the battery cell module.

[0003] When installing the cover on the housing, the cover and the housing need to be aligned to ensure that the cover can seal the opening of the housing and support the battery cells in the housing. However, the alignment requirements between the cover and the housing are high, and the cover is usually heavy, making the alignment process difficult, which will reduce the installation efficiency of the cover. If the alignment is not accurate, the cover, the housing and the battery cells will be damaged when the cover is fixed to the housing. Utility Model Content

[0004] The embodiments of the present application aim to provide a battery pack and an electrical device, so as to at least improve the problem of difficulty in installing the first cover.

[0005] In order to solve the above technical problems, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a battery pack, the battery pack comprising a shell, a battery cell module, a first cover body, a second cover body and a first fastener; the shell comprises a first space and an opening connected to the first space, the shell comprises two first side walls arranged opposite to each other along a second direction, the first side wall is provided with a first recess; the battery cell module is arranged in the first space; the first cover body and the battery cell module are fixed, the battery cell module and the first cover body are arranged along the first direction, the first cover body is provided with a first convex portion, and the first convex portion is at least partially placed in the first recess; the second cover body is arranged on a side of the first cover body away from the battery cell module, and the second cover body covers the opening; the first fastener fixes the first side wall, the first cover body and the second cover body; wherein the second direction is perpendicular to the first direction.

[0007] In one or more / any one of the above optional embodiments, the first side wall is provided with a first hole, one end of the first hole is connected to the first recessed portion; the first convex portion is provided with a second hole, the second cover body is provided with a third hole, and the first fastener is provided in the first hole, the second hole and the third hole.

[0008] In one or more / any one of the above optional embodiments, a second recess is provided on one side of the first protrusion facing the first direction, and one end of the second hole is connected to the second recess.

[0009] In one or more / any one of the above optional embodiments, along the first direction, the first cover body does not extend beyond the first side wall.

[0010] In one or more / any one of the above optional embodiments, the shell is provided with a fourth hole, and the second cover is provided with a fifth hole; the battery pack includes a second fastener, and the second fastener is provided at the fourth hole and the fifth hole.

[0011] In one or more / any one of the above optional embodiments, the shell includes two second side walls, and along the third direction, the two second side walls are arranged on opposite sides of the battery cell module, and the two second side walls and the two first side walls together enclose a first space; wherein the third direction is perpendicular to the first direction and the second direction.

[0012] In one or more / any one of the above optional embodiments, the battery pack includes a fixing member, the battery cell module includes a plurality of battery cells arranged along a first direction, and along the first direction, the fixing member is arranged around the battery cell module and the outside of the first cover.

[0013] In one or more / any one of the above optional embodiments, the first side wall includes a second protrusion, the first cover body includes a third recess, and the second protrusion is arranged in the third recess; along the third direction, the second protrusion and the first fastener are arranged in sequence; wherein the third direction is perpendicular to the first direction and the second direction.

[0014] In one or more / any one of the above optional embodiments, the first cover body includes two first protrusions and a connecting portion connecting the two first protrusions, the connecting portion is arranged in the first recessed portion, and the two first protrusions are arranged in the first recessed portion.

[0015] In a second aspect, an embodiment of the present application provides an electrical device, the electrical device comprising a load and a battery pack as described in any one of the above items, wherein the battery pack is configured to supply power to the load.

[0016] In the battery pack of the present application, the shell is provided with a first recess, and the first cover is provided with a first convex portion, and the first convex portion is at least partially placed in the first recess. When installing the first cover, by placing the first convex portion into the first recess, the alignment between the first cover and the shell can be assisted, which is beneficial to reduce the difficulty of installing the first cover, improve the alignment efficiency, and improve the problem of damage to the battery pack when installing the first cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] One or more embodiments are exemplarily described by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and the figures in the drawings do not constitute proportional limitations unless otherwise stated.

[0018] Figure 1 is a partial structural schematic diagram of a battery pack according to an embodiment of the present application;

[0019] Figure 2is a partial structural schematic diagram of a battery pack according to an embodiment of the present application;

[0020] Figure 3 yes Figure 1 A schematic structural diagram of the first cover body;

[0021] Figure 4 yes Figure 1 A schematic structural diagram of the first side wall;

[0022] Figure 5 yes Figure 1 A partial enlarged view of

[0023] Figure 6 It is a structural schematic diagram of the battery pack of the present application;

[0024] Figure 7 yes Figure 6 A partial enlarged view of

[0025] Figure 8 yes Figure 6 A partial cross-sectional view of a battery pack;

[0026] Fig. 9 It is a schematic diagram of the structure of the electrical equipment of the embodiment of the present application.

[0027] The reference numerals in the specific implementation manner are as follows:

[0028] 100. Battery pack;

[0029] 1. housing; 11. first side wall; 111. slot; 112. first recess; 113. second protrusion; 114. first hole; 115. fourth hole; 12. second side wall; 13. third side wall; 14. first space; 15. opening;

[0030] 2. Battery cell module; 21. Battery cell; 22. Fixing parts;

[0031] 3. first cover; 31. limiting groove; 32. first convex portion; 321. second hole; 322. second concave portion; 33. third concave portion; 34. connecting portion;

[0032] 4. first fastener; 41. first portion; 42. second portion;

[0033] 5. second cover; 51. third hole; 52. fifth hole;

[0034] 6. Second fastener;

[0035] 1000, electrical equipment; 200, load;

[0036] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0037] In order to facilitate the understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein 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.

[0039] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0040] In the description of the embodiments of the present application, the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meanings and therefore cannot be understood as limiting the scope of protection of the present application. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0041] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art 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 term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0042] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0043] In a first aspect, an embodiment of the present application provides a battery pack 100, which is used to supply power. The battery pack 100 may be a primary battery or a secondary battery, for example, it may be one or more of a lithium-ion battery, a lithium-ion polymer battery, a lithium iron phosphate battery, a lead-acid battery, and a nickel-cadmium battery.

[0044] In some embodiments, Figure 1 and Figure 2 As shown, the battery pack 100 includes a shell 1, a battery module 2 and a first cover 3. The shell 1 has an opening 15 and a first space 14, the opening 15 is connected to the first space 14, the battery module 2 is arranged in the first space 14 through the opening 15, the first cover 3 and the battery module 2 are fixed, and the battery module 2 and the first cover 3 are arranged along the first direction X. The first cover 3 and the shell 1 define the relative position between the first cover 3 and the shell 1. In the above manner, the relative position between the battery module 2 and the shell 1 can be defined.

[0045] In some embodiments, Figure 1 As shown, the housing 1 is in a rectangular parallelepiped shape, and the opening 15 is located at one end of the housing 1. The housing 1 can also be in a cylindrical or prism shape.

[0046] In some embodiments, Figure 6 and Figure 7 As shown, the battery pack 100 includes a second cover 5, which covers the opening 15, so as to enclose the battery module 2 in the first space 14 to protect the battery module 2. It is understandable that the second cover 5 can also be in other shapes, such as a circular plate, an elliptical plate or a prism shape. Optionally, the second cover 5 is made of metal or plastic, preferably metal, such as aluminum alloy, which is conducive to strengthening the strength of the second cover 5.

[0047] It is understandable that the second cover 5 is adapted to the opening 15 , that is, the shape and size of the second cover 5 are substantially the same as those of the opening 15 , so that when the second cover 5 is covered on the opening 15 , the opening 15 can be sealed to isolate the first space 14 from the external environment.

[0048] In some embodiments, Figure 1 and Figure 2 As shown, the second cover 5 is arranged on the side of the first cover 3 away from the battery module 2. When the second cover 5 is fixedly connected to the shell 1, the expansion force generated by the expansion of the battery module 2 will be transmitted to the first cover 3, and the first cover 3 will then transmit the expansion force to the second cover 5 and the shell 1, thereby suppressing the expansion of the battery module 2.

[0049] In some embodiments, Figure 6As shown, the second cover body 5 is entirely located on the side of the first cover body 3 facing away from the housing 1 , and covers the first cover body 3 . The second cover body 5 can protect the first cover body 3 .

[0050] In some embodiments, the battery pack 100 includes a first fastener 4, which fixes the first side wall 11, the first cover 3 and the second cover 5 to fix the first cover 3 and the second cover 5 to the housing 1. When the battery module 2 expands, the expansion force can be transmitted to the housing 1 to suppress the expansion of the battery module 2.

[0051] In some embodiments, Figure 1 As shown, the housing 1 includes two second side walls 12, and along the third direction Z, the two second side walls 12 are arranged on opposite sides of the battery module 2. The first side wall 11 and the second side wall 12 surround the battery module 2, and the two second side walls 12 and the two first side walls 11 together enclose a first space 14 and an opening 15, and the opening 15 is located on the side of the housing 1 facing the first direction X or away from the first direction X. In the embodiment of the present application, the opening 15 is located on the side of the housing 1 facing the first direction X as an example for explanation. Among them, the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0052] In some embodiments, Figure 1 As shown, along the second direction Y, the two ends of the second side wall 12 are respectively connected to the two first side walls 11. Along the third direction Z, the two ends of the first side wall 11 are respectively connected to the two second side walls 12; and the first side wall 11 is perpendicular to the second side wall 12. It can be understood that the first side wall 11 and the second side wall 12 can also be indirectly connected, for example, the first side wall 11 and the second side wall 12 are connected by angle steel.

[0053] The first side wall 11 and the second side wall 12 can be detachably connected by screws or bolts, or can be connected by other means. Figure 4 As shown, the first side wall 11 is provided with a slot 111, the slot 111 extends along the first direction X, and one end of the second side wall 12 along the second direction Y is connected to the slot 111. When connecting the first side wall 11 with the second side wall 12, one end of the second side wall 12 is inserted into the slot 111 along the first direction X, so that the first side wall 11 and the second side wall 12 are easy to disassemble and assemble, and the use of screws or bolts is reduced.

[0054] In some embodiments, Figure 1As shown, the housing 1 includes a third side wall 13, which is disposed on a side of the battery module 2 in the opposite direction of the first direction X, and the third side wall 13 is connected to the first side wall 11 and the second side wall 12, thereby forming a housing 1 with an opening 15 at one end. Optionally, the third side wall 13 can be detachably connected to the first side wall 11 and the second side wall 12 by screws or bolts. It is understandable that the third side wall 13 has substantially the same shape and size as the first side wall 11.

[0055] In some embodiments, the first side wall 11, the second side wall 12 and the third side wall 13 are made of metal or plastic. The first side wall 11, the second side wall 12 and the third side wall 13 are preferably made of metal, such as aluminum alloy, which is conducive to strengthening the strength of the housing 1. The surfaces of the first side wall 11, the second side wall 12 and the third side wall 13 can be coated with insulating paint to enhance the insulation of the first side wall 11, the second side wall 12 and the third side wall 13.

[0056] In some other embodiments, the housing 1 is formed in one piece, which is beneficial to improving the strength and sealing of the housing 1.

[0057] For the above-mentioned battery cell module 2, if Figure 2 As shown, the battery module 2 includes a plurality of stacked battery cells 21 , and the plurality of battery cells 21 are arranged along a first direction X. The thickness direction of the battery cells 21 may be parallel to the first direction X, that is, the plurality of battery cells 21 are stacked along the thickness direction, which is beneficial to improving the stability of the stacking of the battery cells 21 .

[0058] For the above-mentioned battery cell 21, Figure 2 As shown, the battery cell 21 may be in the shape of a rectangular plate, and the stacked battery cells 21 may be in the shape of a cuboid to fit into the first space 14 , thereby reducing the gap between the battery cell 21 and the inner wall of the shell 1 and increasing the energy density of the battery pack 100 .

[0059] In some embodiments, Figure 2 As shown, the battery pack 100 includes a fixing member 22, which is disposed around the outer side of the battery module 2 and the first cover 3 along the first direction X to bundle the multiple battery cells 21 together. There can be multiple fixing members 22, and multiple fixing members 22 are spaced apart and sleeved on the battery module 2 to enhance the stability of bundling. The fixing member 22 can be a steel belt or a plastic belt, such as a PET belt.

[0060] By supporting the first cover 3 between the fixing member 22 and the battery cell 21, the problem of the fixing member 22 damaging the battery cell 21 is improved. The expansion force generated by the expansion of the battery cell module 2 can be transmitted to the first cover 3 and the housing 1 to suppress the expansion of the battery cell module 2.

[0061] It is understandable that a first cover 3 may be provided on each side of the plurality of stacked cells 21 along the stacking direction to further improve the problem of the fixing member 22 damaging the cell 21. The size of the first cover 3 away from the opening 15 may be smaller than the size of the first cover 3 provided at the opening 15 to ensure that the cell module can be placed in the first space 14. For example, along the second direction Y, the length of the first cover 3 away from the opening 15 is smaller than the length of the first cover 3 provided at the opening 15.

[0062] In some embodiments, Figure 3 As shown, a limiting groove 31 is provided on the side of the first cover body 3 facing away from the battery cell 21, and the limiting groove 31 corresponds to the position of the fixing member 22. When the fixing member 22 bundles the first cover body 3 and the battery cell 21, the fixing member 22 can be at least partially placed in the limiting groove 31, thereby limiting the relative position between the fixing member 22 and the first cover body 3, and improving the movement of the fixing member 22 relative to the first cover body 3.

[0063] In some embodiments, Figure 2 As shown, along the third direction Z, the width of the battery cell 21 is smaller than the width of the first cover 3. Then, along the third direction Z, there is a gap between the fixing member 22 and the battery cell 21, and the fixing member 22 is not easy to contact the battery cell 21, further improving the problem of the fixing member 22 damaging the battery cell 21.

[0064] For the first cover 3, Figures 1 to 3 As shown, the first cover 3 is roughly in the shape of a rectangular plate. It is understandable that the first cover 3 can also be in other shapes, such as a circular plate, an elliptical plate or a prism. Optionally, the first cover 3 is made of metal or plastic, and the first cover 3 is preferably made of plastic, which is conducive to enhancing the insulation performance of the first cover 3.

[0065] In some embodiments, Figure 1 , Figures 3 to 5 As shown, the housing 1 includes two first side walls 11 arranged opposite to each other along the second direction Y. Along the second direction Y, the two first side walls 11 are arranged on opposite sides of the battery module 2. The second direction Y is perpendicular to the first direction X. The first side wall 11 is provided with a first recess 112, which is connected to the opening 15; the first cover 3 is provided with a first protrusion 32, which is at least partially placed in the first recess 112.

[0066] In some embodiments, the number of the first recessed portions 112 is two, and along the second direction Y, the two first recessed portions 112 are respectively located on opposite sides of the first space 14; the number of the first convex portions 32 is two, and the two first convex portions 32 are respectively at least partially placed in the two first recessed portions 112. The first convex portion 32 is adapted to the first recessed portion 112, and the shape and size of at least part of the first convex portion 32 are the same as the shape and size of the first recessed portion 112, and this part of the first convex portion 32 is an adapted portion, so that when the adapted portion of the first convex portion 32 is placed in the first recessed portion 112, along the third direction Z, the two ends of the first cover body 3 along the second direction Y are aligned with the first space 14. Alternatively, along the third direction Z, the width of the first convex portion 32 is equal to the width of the first recessed portion 112, and the two ends of the first cover body 3 along the second direction Y can also be aligned with the first space 14.

[0067] In some other embodiments, the number of the first recess 112 and the first convex portion 32 may be one, the first recess 112 may be provided on the first side wall 11 or the second side wall 12, and the first convex portion 32 is correspondingly provided on one side of the first cover 3 along a direction parallel to the second direction Y or along a side parallel to the third direction Z. For example, the first recess 112 is provided on one side of the opening 15 along the second direction Y, and the first convex portion 32 is provided on one side of the first cover 3 along the second direction Y. When the first convex portion 32 is partially placed in the first recess 112, along the third direction Z, one end of the first cover 3 along the second direction Y is aligned with the first space 14, so as to assist the alignment between one end of the first cover 3 along the second direction Y and the housing 1, which is conducive to reducing the difficulty of installing the first cover 3 and improving the alignment efficiency.

[0068] In some embodiments, Figure 3 and Figure 4 As shown, the first cover 3 includes a third recess 33, and the first side wall 11 includes a second protrusion 113. Figure 5 , the second convex portion 113 is disposed in the third concave portion 33 .

[0069] In some embodiments, the third recess 33 is located on one side of the first cover 3 along the third direction Z. When the second protrusion 113 is placed on the third recess 33, along the second direction Y, both ends of the first cover 3 along the second direction Y are aligned with the first space 14 to assist in the alignment between the first cover 3 and the housing 1. The first recess 112 and the second protrusion 113 position the first cover 3 along two mutually perpendicular directions, respectively, so that the first cover 3 is aligned with the first space 14 along the second direction Y and the third direction Z, which can enhance the alignment effect between the first cover 3 and the housing 1 and further improve the alignment efficiency.

[0070] In some embodiments, the first cover 3 is provided with third recesses 33 on both opposite sides along the third direction Z, and / or the first cover 3 is provided with third recesses 33 at both ends along the second direction Y, so as to enhance the alignment effect between the first cover 3 and the housing 1, and further improve the alignment efficiency. In an optional embodiment, the first cover 3 is provided with four third recesses 33, and the four third recesses 33 are respectively adjacent to the four corners of the third cover 3.

[0071] In some embodiments, Figure 4 and Figure 5 As shown, along the third direction Z, the second protrusion 113 and the first fastener 4 are arranged in sequence, which is beneficial to the fixation of the first cover body 3 and the first side wall 11 .

[0072] In some embodiments, Figure 3 As shown, the first cover body 3 includes a connecting portion 34, which is connected to the first convex portion 32 to enhance the connection strength between the first convex portion 32 and the main body of the first cover body 3, and improve the problem of fracture between the first convex portion 32 and the main body of the first cover body 3. The main body of the first cover body 3 is the part of the first cover body 3 other than the first convex portion 32 and the connecting portion 34.

[0073] like Figure 3 As shown, the first cover 3 includes two first protrusions 32, a connecting portion 34 connects the two first protrusions 32, and the connecting portion 34 and the two first protrusions 32 are both arranged in the first recess 112. When the first protrusion 32 is placed in the first recess 112, the connecting portion 34 can be supported between the two first protrusions 32, thereby improving the problem of the distance between the two first protrusions 32 being shortened under external force.

[0074] In some embodiments, Figure 1 As shown, along the first direction X, the first cover body 3 does not extend beyond the first side wall 11. When the second cover body 5 is covered on the opening 15, the second cover body 5 can fit with the side of the first side wall 11 facing the first direction to enhance the sealing effect between the second cover body 5 and the first side wall 11, and enhance the sealing effect on the first space 14. When the first cover body 3 is recessed in the first side wall 11 along the first direction X, the second cover body 5 can also be partially embedded in the first space 14, enhance the stability of the connection between the second cover body 5 and the housing 1, and enhance the sealing effect of the second cover body 5 on the first space 14.

[0075] In some embodiments, Figures 3 to 5As shown, the first side wall 11 is provided with a first hole 114, and one end of the first hole 114 is connected to the first recess 112. The first convex portion 32 is provided with a second hole 321, the second cover body 5 is provided with a third hole 51, and the first fastener 4 is provided at the first hole 114, the second hole 321 and the third hole 51. The first cover body 3 and the second cover body 5 are fixed to the housing 1. The first fastener 4 can be a screw or a bolt, so as to detachably connect the first cover body 3 and the second cover body 5 to the housing 1. It can be understood that, optionally, the first hole 114 is a threaded hole, and the first fastener 4 is a screw. Optionally, the first hole 114 and the second hole 321 are both circular.

[0076] Please continue reading Figure 8 The first fastener 4 includes a first part 41 and a second part 42. The first part 41 is arranged in the first hole 114 and the second hole 321 to connect the first cover body 3 with the shell 1; the second part 42 is arranged in the third hole 51, and the second part 42 is connected to the first part 41 to connect the second cover body 5 with the shell 1, so that the first cover body 3 and the second cover body 5 are connected to the shell 1 at the same time, which is beneficial to reduce the number of openings on the battery pack 100, reduce the number of fasteners in the battery pack 100, reduce the volume of the battery pack 100, and reduce the weight of the battery pack 100.

[0077] The number of the first hole 114 and the second hole 321 can be multiple, each second hole 321 corresponds to a first hole 114, and each first fastener 4 is arranged at the corresponding first hole 114 and second hole 321 to enhance the connection strength between the first cover 3 and the shell 1. Along the third direction Z, the two second holes 321 are respectively arranged adjacent to the opposite sides of the first cover 3, and the shell 1 is correspondingly provided with two first holes 114 to increase the distance between the two first fasteners 4, enhance the connection strength between the first cover 3 and the shell 1, and the number of the first holes 114 and the second holes 321 is also small, which is conducive to reducing production costs.

[0078] In some embodiments, Figure 3 and Figure 5 As shown, a second recess 322 is provided on one side of the first protrusion 32 facing the first direction X, and one end of the second hole 321 is connected to the second recess 322. When the first fastener 4 connects the second hole 321 with the first hole 114, the head of the first fastener 4 can be at least partially received in the second recess 322, thereby reducing the length of the first fastener 4 protruding from the first cover 3 along the first direction X, and reducing the overall length of the battery pack 100 along the first direction X. Optionally, as Figure 3 As shown, the second recess 322 penetrates the first cover body 3 in a direction away from the first cover body 3 .

[0079] In some embodiments, Figure 6 and Figure 7As shown, the battery pack 100 includes a second fastener 6, which fixes the first side wall 11 and the second cover 5 to fix the second cover 5 to the housing 1. When the battery module 2 expands, the expansion force can be transmitted to the housing 1 through the second cover 5 to suppress the expansion of the battery module 2.

[0080] In some embodiments, Figure 5 , Figure 6 and Figure 7 As shown, the housing 1 is provided with a fourth hole 115, the second cover 5 is provided with a fifth hole 52, and the second fastener 6 is provided at the fourth hole 115 and the fifth hole 52 to fix the second cover 5 to the housing 1. The second fastener 6 can be a screw or a bolt, so as to detachably connect the second cover 5 to the housing 1. Optionally, the fourth hole 115 can be provided on the first side wall 11. Optionally, the fourth hole 115 is a threaded hole, and the second fastener 6 is a screw. Optionally, the fourth hole 115 and the fifth hole 52 are both circular.

[0081] The number of the fourth hole 115 and the fifth hole 52 can be multiple, each fifth hole 52 corresponds to a fourth hole 115, and each second fastener 6 is arranged at the corresponding fourth hole 115 and fifth hole 52 to enhance the connection strength between the second cover 5 and the shell 1. Optionally, four fifth holes 52 are respectively arranged adjacent to the four corners of the second cover 5, and the shell 1 is correspondingly provided with four fourth holes 115 to increase the distance between the four second fasteners 6, enhance the connection strength between the second cover 5 and the shell 1, and the number of the fourth holes 115 and the fifth holes 52 is also small, which is conducive to reducing production costs.

[0082] Second, as Fig. 9 As shown, an embodiment of the present application provides an electric device 1000. The electric device 1000 is not particularly limited, and it can be any electronic device known in the prior art. For example, the electric device 1000 includes but is not limited to Bluetooth headsets, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecrafts, etc.

[0083] like Fig. 9 As shown, the electric device 1000 includes a load 200 and a battery pack 100, and the battery pack 100 is configured to supply power to the load 200. The load 200 may be a display, a speaker, a processor, a light emitting device, a motor, etc. It is understood that the type of the load 200 is not limited thereto.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Under the concept of the present application, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other changes in different aspects of the present application as described above, which are not provided in detail for the sake of simplicity. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack, characterized in that: include: A shell, comprising a first space and an opening communicating with the first space, the shell comprising two first side walls arranged opposite to each other along a second direction, the first side walls being provided with a first recess; A battery cell module is arranged in the first space; A first cover body is fixed to the battery cell module, the battery cell module and the first cover body are arranged along a first direction, the first cover body is provided with a first convex portion, and the first convex portion is at least partially placed in the first concave portion; A second cover body is disposed on a side of the first cover body away from the battery module, and the second cover body covers the opening; a first fastener, fixing the first side wall, the first cover body and the second cover body; The second direction is perpendicular to the first direction.

2. The battery pack according to claim 1, characterized in that: The first side wall is provided with a first hole, and one end of the first hole is connected to the first recess; The first protrusion is provided with a second hole, the second cover is provided with a third hole, and the first fastener is provided at the first hole, the second hole and the third hole.

3. The battery pack according to claim 2, characterized in that: A second recess is provided on one side of the first protrusion facing the first direction, and one end of the second hole is connected to the second recess.

4. The battery pack according to any one of claims 1 to 3, characterized in that: Along the first direction, the first cover does not exceed the first side wall.

5. The battery pack according to claim 4, characterized in that: The shell body is provided with a fourth hole, and the second cover body is provided with a fifth hole; The battery pack includes a second fastener disposed at the fourth hole and the fifth hole.

6. The battery pack according to claim 4, characterized in that: The housing includes two second side walls, and along the third direction, the two second side walls are arranged on opposite sides of the battery cell module, and the two second side walls and the two first side walls together enclose the first space; Wherein, the third direction is perpendicular to the first direction and the second direction.

7. The battery pack according to claim 4, characterized in that: The battery pack includes a fixing member, the battery cell module includes a plurality of battery cells arranged along the first direction, and the fixing member is arranged around the battery cell module and the outer side of the first cover body along the first direction.

8. The battery pack according to claim 4, characterized in that: The first side wall includes a second convex portion, the first cover body includes a third concave portion, and the second convex portion is disposed in the third concave portion; Along the third direction, the second protrusion and the first fastener are arranged in sequence; Wherein, the third direction is perpendicular to the first direction and the second direction.

9. The battery pack according to claim 4, characterized in that: The first cover body includes two first protrusions and a connecting portion connecting the two first protrusions, the connecting portion is arranged in the first recessed portion, and the two first protrusions are arranged in the first recessed portion.

10. An electrical device, characterized in that: include: load; The battery pack according to any one of claims 1 to 9, wherein the battery pack is configured to supply power to the load.

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