Battery assembly and electronic equipment

Abstract

The invention belongs to the technical field of electronic equipment, and particularly relates to a battery assembly and electronic equipment. The battery assembly comprises a battery cell, a side sealing edge and first adhesive tape, wherein the battery cell comprises a first surface, a second surface and a first side surface; the side sealing edge is arranged on the first side surface and is bent towards the second surface; the first gummed paper comprises a first fitting part and a second fitting part; one end of the first attaching part is attached to the outer surface of the side sealing edge, and the other end of the first attaching part extends along the thickness direction of the battery cell and is bent to the second surface so as to seal the side sealing edge; one end of the second attaching part is connected to one side, far away from the second surface, of the first attaching part and is attached to the outer surface of the side sealing edge, and the other end of the second attaching part extends in the thickness direction of the battery cell and is bent to the first surface; wherein in the first direction, the length of the second attaching part is smaller than that of the first attaching part. According to the battery assembly and the electronic equipment provided by the invention, the miniaturization and light and thin design of the electronic equipment can be conveniently realized.

Description

Technical Field

[0001] The present application belongs to the technical field of electronic equipment, and in particular, relates to a battery assembly and electronic equipment. Background Art

[0002] As an energy device for electronic devices such as mobile phones and tablets, batteries are an indispensable part of electronic devices. With the increasing demand for miniaturization and thinner design of electronic devices, the space available for batteries in electronic devices is gradually getting smaller. This requires that batteries can be made smaller and thinner while still meeting the power requirements of electronic devices.

[0003] In order to prevent the battery from being damaged by impact when the electronic device collides or falls, it is usually necessary to set adhesive tape around the battery cell to absorb the impact force from the outside. Since the adhesive tape itself has a certain thickness, using adhesive tape to wrap the battery cell will cause the overall volume of the battery to increase, especially the size in the thickness direction, which will limit the development of electronic devices to be thinner and lighter. Therefore, how to reduce the impact of adhesive tape on the size of batteries and electronic devices is an urgent problem to be solved. Summary of the invention

[0004] The present application provides a battery assembly and an electronic device, wherein the battery assembly can achieve a lightweight design, can reduce the impact on the size of the electronic device, and facilitates the miniaturization and lightweight design of the electronic device.

[0005] In order to achieve the above objectives, in a first aspect, the present application provides a battery assembly, comprising:

[0006] The battery cell comprises: a first surface and a second surface opposite to each other in a thickness direction, and a first side surface connected between the first surface and the second surface and extending in a first direction, wherein the first direction is a direction from the head of the battery cell to the tail of the battery cell;

[0007] Side sealing edge; the side sealing edge is arranged on the first side surface and is bent toward the second surface;

[0008] A first adhesive tape, the first adhesive tape comprising a first laminating portion and a second laminating portion;

[0009] One end of the first bonding portion is bonded to the outer surface of the side sealing edge, and the other end of the first bonding portion extends along the thickness direction of the battery cell and is bent to the second surface and bonded to the second surface to close the side sealing edge;

[0010] One end of the second bonding portion is connected to a side of the first bonding portion away from the second surface and is bonded to the outer surface of the side sealing edge, and the other end of the second bonding portion extends along the thickness direction of the battery core and is bent to the first surface and is bonded to the first surface;

[0011] Wherein, along the first direction, the length of the second fitting portion is smaller than the length of the first fitting portion.

[0012] The battery assembly provided by the present application realizes the protection of the battery cell and the side edge seal by setting the first adhesive tape, and the first bonding portion of the first adhesive tape is bonded to the side edge seal and the second surface, thereby sealing the side edge seal to prevent the side edge seal from rubbing against the battery compartment when the battery assembly receives an impact force from the outside of the electronic device, resulting in the side edge seal from loosening. At the same time, by setting the second bonding portion, it is possible to prevent the first bonding portion from warping or even loosening when the first bonding portion rubs against the battery compartment. The present application utilizes the first bonding portion and the second bonding portion to realize the protection of the battery cell and the side edge seal. Since the length of the second bonding portion is less than the first bonding portion, the volume of the second bonding portion can be reduced while realizing the protection of the battery cell and the side edge seal, thereby helping to reduce the overall volume of the battery assembly. At the same time, reducing the size of the second bonding portion can also provide more space for the battery assembly and other components in the electronic device, thereby facilitating the realization of a lightweight design of the electronic device.

[0013] In an optional embodiment, the first surface is used to face the bottom surface of the battery compartment;

[0014] The bottom surface of the battery compartment is provided with a first recessed portion corresponding to the second fitting portion, and the first recessed portion is used to accommodate the second fitting portion, so that the first surface fits the bottom surface of the battery compartment. In this way, the gap between the first surface and the bottom surface of the battery compartment can be eliminated, thereby eliminating the influence of the second fitting portion on the thickness of the electronic device, thereby facilitating the realization of a lightweight and thin design of the electronic device.

[0015] In an optional embodiment, one end of the second fitting portion fitted to the first surface extends a first distance along the second direction;

[0016] The second direction is a direction perpendicular to the first direction in the first surface. In this way, the area of ​​the second bonding portion bonded to the first surface is as small as possible while ensuring bonding strength, thereby reducing its impact on the overall volume of the battery assembly.

[0017] In an optional embodiment, there are multiple second bonding parts, and the multiple second bonding parts are arranged at intervals along the first direction. In this way, the multiple second bonding parts can be respectively located at the positions where the first bonding part is prone to warping, curling or even loosening, so as to achieve targeted arrangement of the second bonding parts, improve the bonding protection of the second bonding parts to the first bonding parts, and reduce the total area of ​​the second bonding parts as much as possible, thereby reducing the overall volume of the battery assembly to provide more space for the arrangement of other structures.

[0018] In an optional embodiment, along the first direction, the length of the first fitting portion is less than the length of the first side surface, an end of the first fitting portion close to the head portion is spaced from an end of the first side surface close to the head portion, and an end of the first fitting portion close to the tail portion is spaced from an end of the first side surface close to the tail portion;

[0019] There are two second bonding parts, and the two second bonding parts are respectively located at the two ends of the first bonding part along the first direction. In this way, along the first direction, the two ends of the first adhesive tape are "U"-shaped structures, and the middle position is "L"-shaped structure, so that more space can be reserved in the middle for arranging other structures, so as to realize the light, thin and miniaturized design of the electronic device.

[0020] In an optional embodiment, the second fitting portion has a width along the second direction;

[0021] The width of the second bonding portion near the head is greater than the width of the second bonding portion near the tail. That is, the first distance of the second bonding portion near the head is greater than the first distance of the second bonding portion near the tail, so that the bonding area of ​​the second bonding portion near the head to the first surface can be larger, and its ability to resist high temperature can be enhanced to reduce the possibility of it loosening at high temperature, thereby realizing overheat protection of the first adhesive tape.

[0022] In an optional embodiment, the thickness of the second bonding portion near the head is greater than the thickness of the second bonding portion near the tail. This can enhance the ability of the second bonding portion near the head of the battery cell to resist high temperatures, thereby reducing the possibility of it loosening at high temperatures, thereby achieving overheat protection for the first adhesive tape.

[0023] In an optional embodiment, the second fitting portion has a width along the second direction;

[0024] When the number of the second fitting parts is greater than two, the width of the second fitting part near the head of any two adjacent second fitting parts is greater than the width of the second fitting part near the tail. That is, the first distance of the second fitting part near the head of any two adjacent second fitting parts is greater than the first distance of the second fitting part near the tail, so that the first distances of the second fitting parts can be gradually reduced from the head to the tail of the battery cell, so that the second fitting part near the head can be attached to the first surface with a larger attachment area, enhance its ability to resist high temperature, reduce the possibility of its loosening at high temperature, and thus achieve overheat protection for the first adhesive tape.

[0025] In an optional embodiment, when the number of the second bonding parts is greater than two, the thickness of the second bonding part near the head of any two adjacent second bonding parts is greater than the thickness of the second bonding part near the tail. In this way, the thickness of the multiple second bonding parts can be gradually reduced from the head of the battery cell to the tail, so as to enhance the ability of the second bonding part near the head of the battery cell to resist high temperature, reduce the possibility of it loosening at high temperature, and thus achieve overheat protection for the first adhesive tape.

[0026] In an optional embodiment, the battery cell assembly further includes a second adhesive tape;

[0027] The second adhesive tape includes a third laminating portion and a fourth laminating portion;

[0028] One end of the third bonding portion is bonded to the bottom surface of the tail portion, and the other end of the third bonding portion extends along the thickness direction of the battery core and is bent to the second surface and bonded to the second surface;

[0029] One end of the fourth bonding portion is connected to the side of the second bonding portion away from the second surface and is bonded to the bottom surface, and the other end of the fourth bonding portion extends along the thickness direction of the battery cell and is bent to the first surface and is bonded to the first surface. The battery assembly is protected by the third bonding portion and the fourth bonding portion of the second adhesive tape to prevent the battery assembly from being deformed or damaged by the impact force on the battery cell tail when the electronic device collides or falls.

[0030] In an optional embodiment, when the first surface is used to face the bottom surface of the battery compartment, the bottom surface of the battery compartment is provided with a second recessed portion corresponding to the fourth fitting portion, and the second recessed portion is used to accommodate the fourth fitting portion, so that the first surface fits the bottom surface of the battery compartment. In this way, the gap between the first surface and the bottom surface of the battery compartment can be eliminated, thereby eliminating the influence of the fourth fitting portion on the thickness of the electronic device, thereby facilitating the realization of a lightweight and thin design of the electronic device.

[0031] In an optional embodiment, along the second direction, the length of the fourth fitting portion is less than the length of the third fitting portion. This can avoid setting too many fourth fitting portions on the edge of the first surface close to the bottom surface, thereby reducing the overall volume of the battery assembly and the space occupied by the battery assembly in the electronic device, thereby providing space for the battery assembly or other structures of the electronic device.

[0032] In an optional embodiment, one end of the fourth bonding portion bonded to the first surface extends along the first direction for a second distance, so that the area of ​​the fourth bonding portion bonded to the first surface is as small as possible while ensuring bonding strength, thereby reducing its impact on the overall volume of the battery assembly.

[0033] In an optional embodiment, there are multiple fourth laminating parts, and the multiple fourth laminating parts are arranged at intervals along the second direction. In this way, the multiple fourth laminating parts can be respectively located at the positions where the third laminating part is prone to warping, curling or even loosening, thereby realizing the targeted arrangement of the fourth laminating parts, improving the laminating protection of the third laminating part by the fourth laminating parts, and reducing the total area of ​​the fourth laminating parts as much as possible, thereby reducing the overall volume of the battery assembly, and providing more space for the arrangement of other structures.

[0034] In an optional embodiment, along the second direction, the length of the third fitting portion is equal to the length of the bottom surface;

[0035] There are two fourth bonding parts, and each of the fourth bonding parts is spaced apart from both ends of the third bonding part along the second direction. In this way, the adhesion of the key area of ​​the third bonding part can be enhanced while reducing the area of ​​the fourth bonding part, so that more space can be reserved for arranging other structures, so as to realize the lightness, thinness and miniaturization design of the electronic device.

[0036] In order to achieve the above-mentioned purpose, in a second aspect, the present application provides an electronic device, comprising the battery assembly as described in the above-mentioned first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0038] Figure 1 It is a schematic diagram of the three-dimensional structure of a mobile phone;

[0039] Figure 2 It is a schematic diagram of the exploded structure of a mobile phone;

[0040] Figure 3 It is a schematic diagram of a three-dimensional structure of a battery assembly provided in an embodiment of the present application at one angle;

[0041] Figure 4 is a schematic diagram of a three-dimensional structure of a battery assembly provided in an embodiment of the present application from another angle;

[0042] Figure 5 is a schematic diagram of the exploded structure of a battery assembly provided in an embodiment of the present application;

[0043] Figure 6 The embodiment of the present application provides Figure 4 The partial cross-sectional view in the AA direction;

[0044] Figure 7The embodiment of the present application provides Figure 4 The partial cross-sectional view along the BB direction;

[0045] Figure 8 is a schematic diagram of the three-dimensional structure of another battery assembly provided in an embodiment of the present application;

[0046] Fig. 9 is a schematic diagram of the structure of the battery compartment provided in this embodiment;

[0047] Fig.10 is a schematic structural diagram of a cross section of a battery assembly and a battery compartment provided in this embodiment in an assembled state;

[0048] Fig.11 is a schematic structural diagram of a cross section of a battery assembly and a battery compartment provided in this embodiment in an exploded state;

[0049] Fig.12 It is a schematic diagram of the structure of the electronic device provided in this embodiment.

[0050] Graphic marking:

[0051] 01-mobile phone; 02-display component; 03-middle frame; 031-installation slot; 04-battery; 05-cover; 1-battery cell; 11-first surface; 12-second surface; 13-first side; 14-bottom; 2-side sealing; 3-first adhesive tape; 31-first bonding part; 32-second bonding part; 4-second adhesive tape; 41-third bonding part; 42-fourth bonding part; 100-battery assembly; 200-electronic device; 201-battery compartment; 202-first recessed part; 203-second recessed part; 204-shell structure; 2041-metal middle plate; 2042-frame; 205-back cover; 206-display screen. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be described clearly below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments of the present application, other embodiments obtained by ordinary technicians in this field without making creative work all belong to the protection scope of the present application.

[0053] In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0054] Figure 1It is a schematic diagram of the three-dimensional structure of a current mobile phone 01; Figure 2 This is the exploded view of the mobile phone 01.

[0055] Combination Figure 1 and Figure 2 As shown, the mobile phone 01 generally includes a display unit 02, a middle frame 03, a battery 04 and a cover plate 05. The battery 04 is arranged in a mounting slot 031 of the middle frame 03, and the display unit 02 and the cover plate 05 are arranged on both sides of the middle frame 03. In addition, other structures are generally required to be arranged in the mobile phone 01, such as a circuit board, a camera module, and a speaker module. Figure 2 As shown, in order to provide a longer battery life for the mobile phone 01, the battery 04 in the mobile phone 01 usually needs to occupy a larger space in the mobile phone 01, so the thickness of the battery 04 usually has a greater impact on the thickness of the mobile phone 01. Figure 2 The Z-direction dimension of the mobile phone 01 is Figure 2 The size in the Z direction has a greater impact.

[0056] During the assembly process of the mobile phone 01, the battery 04 needs to be placed in the installation slot 031 of the middle frame 03. In order to reduce the impact of the collision between the mobile phone 01 and the external environment on the battery 04, it is usually necessary to set protective tape on the periphery of the battery 04, so that the protective tape can be used to absorb the collision and friction between the battery 04 and the installation slot 031, so as to avoid deformation and damage of the battery 04 due to excessive impact force.

[0057] However, in the process of designing the mobile phone 01 to be thinner and smaller, the protective tape will cause the battery 04 to Figure 2 The size in the Z direction, that is, the thickness of the battery 04, will increase. The increase in the thickness of the battery 04 requires a larger space in the Z direction for the mounting slot 031, which will cause the size of the mobile phone 01 in the Z direction, that is, the thickness, to become larger. At this time, the setting of the protective tape conflicts with the thinning and miniaturization design of the mobile phone 01. Therefore, the problem that needs to be solved urgently is how to protect the battery 04 while facilitating the thinning and miniaturization of the mobile phone 01 without affecting the battery life of the mobile phone 01.

[0058] To solve the above problems, see Figures 3 to 5 In a first aspect, the present embodiment provides a battery assembly 100, which includes a battery cell 1, a side sealing edge 2 and a first adhesive tape 3, wherein the battery cell 1 includes a side sealing edge 2 along its own thickness direction (such as Figure 3 The invention also includes a first surface 11 and a second surface 12 which are opposite to each other and which are connected between the first surface 11 and the second surface 12 and which are along the first direction (such as Figure 3The first side surface 13 extends from the first side surface 13 to the second side surface 12, and the first direction is from the head of the battery cell 1 to the tail of the battery cell 1; the side seal 2 is arranged on the first side surface 13 and is bent toward the second surface 12. The first adhesive tape 3 includes a first bonding portion 31, one end of the first bonding portion 31 is bonded to the outer surface of the side seal 2, and the other end of the first bonding portion 31 extends along the thickness direction of the battery cell 1 and is bent to the second surface 12, and is bonded to the second surface 12 to close the side seal 2, thereby protecting the side seal 2, so as to prevent the side seal 2 from being deformed and separated from the first side surface 13 due to friction with the battery compartment when the side seal 2 is vibrated by the impact force from the outside of the electronic device. At the same time, the first bonding portion 31 can also absorb a part of the impact force from the outside to protect the battery cell 1. However, since one end of the first bonding portion 31 is bonded to the outer surface of the side edge seal 2, and the side edge seal 2 is located on the first side surface 13 of the battery cell 1, the first bonding portion 31 bonded at this position is prone to warping, curling, or even loosening due to relative friction with the battery compartment. Therefore, in order to avoid the above problems, the first adhesive tape 3 also includes a second bonding portion 32, one end of the second bonding portion 32 is connected to the side of the first bonding portion 31 away from the second surface 12, and is bonded to the outer surface of the side edge seal 2, and the other end of the second bonding portion 32 extends along the thickness direction of the battery cell 1 and is bent to the first surface 11, and is bonded to the first surface 11. At this time, the second bonding portion 32 is connected to the first bonding portion 31 at one end of the side edge seal 2, thereby preventing the first bonding portion 31 from warping, curling, or even loosening at this position. In order to reduce the influence of the first adhesive tape 3 on the overall size of the battery assembly 100, by making the length of the second bonding portion 32 along the first direction smaller than the length of the first bonding portion 31 along the first direction, it is possible to avoid setting too many second bonding portions 32 at the edge of the first surface 11 close to the first side surface 13, thereby reducing the overall volume of the battery assembly 100 and reducing the space occupied by the battery assembly 100 in the electronic device, thereby providing a setting space for other structures of the battery assembly 100 or the electronic device. For example, a flexible printed circuit (FPC), a conductive member or a support member for supporting the battery assembly 100, and a glue for fixing the battery assembly 100 can be arranged at a position on the first surface 11 where the second bonding portion 32 is not arranged. By using the gap reserved by the second bonding portion 32 to set other structures, a reasonable layout of the structure in the battery compartment and the electronic device can be achieved, which is convenient for realizing a lightweight and miniaturized design of the electronic device.

[0059] It is worth noting that the head of the above-mentioned battery cell 1 refers to the end of the battery cell 1 provided with a pole ear, and the tail of the battery cell 1 is the end opposite to the head. At the same time, the above-mentioned first side surface 13 is located on the first surface 11 and the second surface 12 and the side located between the head and the tail. The first side surface 13 is two, and the above-mentioned first adhesive tape 3 can be set on one first side surface 13 or on both first side surfaces 13. It can be adjusted according to the setting form of the side sealing edge 2, which is not limited in the present embodiment.

[0060] In some embodiments, the ratio of the length of the second fitting portion 32 along the first direction to the length of the first surface 11 along the first direction is less than or equal to 0.5, specifically, it can be 0.4, 0.3, 0.25, 0.2, 0.1, 0.05, etc. Through the above-mentioned size limitation, the second fitting portion 32 can achieve enhanced fit with the first fitting portion 31 while minimizing the size of the second fitting portion 32, thereby providing more space for the design of other structures.

[0061] Please combine Figure 6 and Figure 7 Since the battery cell 1 is mostly a hexahedral structure, the first bonding portion 31 bonded to the first side surface 13 and the second surface 12 forms an "L"-shaped structure, so that the overall thickness of the battery assembly 100 can be regarded as the sum of the thickness of the battery cell 1 and the thickness of the first bonding portion 31 bonded to the second surface 12, which helps to achieve a thinning design for the thickness of the battery assembly 100. At the same time, the second bonding portion 32 bonded to the first surface 11, since the length of the second bonding portion 32 is less than the length of the first bonding portion 31, in the cross section of the battery assembly 100 formed by the surface parallel to the bottom surface 14 of the tail of the battery cell 1, at the position where the first bonding portion 31 and the second bonding portion 32 are both present, such as Figure 6 As shown, a structure similar to a "U" shape is formed; and at a position where only the first bonding portion 31 is present, such as Figure 7 As shown, a structure similar to an “L” shape is formed. At this time, the thickness of the battery assembly 100 may be different at different positions, and its overall volume is greatly affected by the size of the second fitting portion 32 .

[0062] In order to further reduce the influence of the second bonding portion 32 on the overall volume of the battery assembly 100, the end of the second bonding portion 32 bonded to the first surface 11 can be made to extend in the second direction (eg Figure 6 The second bonding portion 32 is formed by the first bonding portion 32 and the second bonding portion 32 is formed by the first bonding portion 32 and the second bonding portion 32 is formed by the second bonding portion 32 and the second bonding portion 32 is formed by the second bonding portion 32 and the second bonding portion 32 is formed by the second bonding portion 32 and the second bonding portion 32. The second bonding portion 32 is formed by the second bonding portion 32 and the ...

[0063] In one example, the first distance may be the same as the thickness of the battery cell 1, or may be smaller than the thickness of the battery cell 1; or the first distance may be the same as the extension width of the first fitting portion 31 fitted on the second surface 12. That is, the first distance may be adjusted according to actual needs and is not limited in this embodiment.

[0064] In another example, the ratio of the above-mentioned first distance to the width of the first surface 11 along the second direction is less than or equal to 0.5, specifically, it can be 0.4, 0.3, 0.25, 0.2, 0.1, 0.05, etc. Through the above-mentioned size limitation, the second fitting portion 32 can achieve enhanced fit with the first fitting portion 31 while minimizing the size of the second fitting portion 32, thereby providing more space for the design of other structures.

[0065] Please refer again Figure 3 In some embodiments, since the possibility of warping, curling or even loosening of the end of the first fitting portion 31 close to the first surface 11 is different at different positions, the possibility of the above problem occurring at the position where there is more friction with the battery compartment is greater. Therefore, there can be multiple second fitting portions 32, and the multiple second fitting portions 32 are arranged at intervals so that the multiple second fitting portions 32 are respectively located at the positions where the first fitting portion 31 is prone to warping, curling or even loosening, thereby achieving targeted arrangement of the second fitting portions 32, improving the second fitting portion 32 to achieve the fitting protection of the first fitting portion 31, while minimizing the total area of ​​the second fitting portion 32 as much as possible, thereby reducing the overall volume of the battery assembly 100 to provide more space for the arrangement of other structures.

[0066] Specifically, the above-mentioned multiple second fitting parts 32 can be two, three, five or even more, and the spacing between each second fitting part 32 can be equal or unequal. The setting position of each second fitting part 32 can be based on the position where the fitting of the first fitting part 31 is poor. The position can be obtained through empirical design or data simulation. In this embodiment, there is no limitation on the specific setting of the multiple second fitting parts 32.

[0067] Further, the length of the first fitting portion 31 along the first direction is less than the length of the first side surface 13, and there is a spacing between the end of the first fitting portion 31 near the head and the end of the first side surface 13 near the head, and there is a spacing between the end of the first fitting portion 31 near the tail and the end of the first side surface 13 near the tail. That is, in order to avoid the first fitting portion 31 from interfering with the structures that need to be set at the head position and the tail position of the battery cell 1, the two ends of the first fitting portion 31 along the first direction can be spaced from the head and the tail of the battery cell 1 respectively, so as to reserve space for the setting of other structures. Since the number of the second fitting portions 32 is smaller, the impact on the overall volume of the battery assembly 100 is smaller. At the same time, since the position where the first fitting portion 31 has poor fit is mainly at the end position. Therefore, there can be two second fitting portions 32, and the two second fitting portions 32 are respectively located at the two ends of the first fitting portion 31 along the first direction. That is, along the first direction, the two ends of the first adhesive tape 3 are "U"-shaped structures, and the middle position is "L"-shaped structure, so that more space can be reserved in the middle for arranging other structures, so as to realize the lightweight and miniaturized design of the electronic device.

[0068] Since the battery cell 1 generates a large amount of heat during operation, especially at the head of the battery cell 1, the heat accumulation is more obvious, resulting in a higher heat at the head of the battery cell 1, and the high temperature will affect the viscosity of the first adhesive tape 3, causing the first adhesive tape 3 to be easily loosened. In order to avoid the above situation, in one example, when there are two second bonding parts 32, the second bonding parts 32 have a width along the second direction, so that the width of the second bonding part 32 near the head is greater than the width of the second bonding part 32 near the tail. That is, the first distance of the second bonding part 32 near the head is greater than the first distance of the second bonding part 32 near the tail, so that the bonding area of ​​the second bonding part 32 near the head to the first surface 11 can be larger, and its ability to resist high temperature can be enhanced to reduce the possibility of its loosening at high temperature, thereby realizing overheating protection of the first adhesive tape 3.

[0069] In another example, when there are multiple second fitting parts 32, the second fitting parts 32 have a width along the second direction, and the width of the second fitting part 32 near the head of any two adjacent second fitting parts 32 is greater than the width of the second fitting part 32 near the tail. That is, the first distance of the second fitting part 32 near the head of any two adjacent second fitting parts 32 is greater than the first distance of the second fitting part 32 near the tail, so that the first distance of the multiple second fitting parts 32 can be gradually reduced from the direction pointing from the head to the tail of the battery cell 1, so that the second fitting part 32 near the head can be attached to the first surface 11 with a larger attachment area, enhance its ability to resist high temperature, reduce the possibility of its loosening at high temperature, and then achieve overheating protection for the first adhesive tape 3.

[0070] In another example, when there are two second bonding parts 32, in addition to increasing the bonding area of ​​the second bonding part 32, the thickness of the second bonding part 32 near the head of the battery cell 1 can also be made greater than the thickness of the second bonding part 32 near the tail of the battery cell 1, so as to enhance the ability of the second bonding part 32 near the head of the battery cell 1 to resist high temperature, thereby reducing the possibility of it loosening at high temperature, thereby realizing overheat protection of the first adhesive tape 3.

[0071] In another example, when there are multiple second fitting portions 32, the thickness of the second fitting portion 32 near the head of any two adjacent second fitting portions 32 can be greater than the thickness of the second fitting portion 32 near the tail, so that the thickness of the multiple second fitting portions 32 can gradually decrease in the direction from the head of the battery cell 1 to the tail, so as to enhance the ability of the second fitting portion 32 near the head of the battery cell 1 to resist high temperature, so as to reduce the possibility of it loosening at high temperature, thereby realizing overheat protection of the first adhesive tape 3.

[0072] It is understandable that in addition to the above-mentioned adjustment of the size of the second bonding part 32 to adapt to the high temperature environment, it can also be achieved by adjusting the material of the second bonding part 32, the colloid material of the second bonding part 32, improving the heat dissipation of the battery cell 1, etc., which is not limited in this embodiment.

[0073] See also Figure 8 In some embodiments, since the first adhesive tape 3 may rub against the battery compartment, in order to extend the service life of the first adhesive tape 3, the thickness of the first bonding portion 31 and the second bonding portion 32 at the portion where the friction is more serious may be increased. For example, the thickness may be increased at the portion where the first bonding portion 31 and the second bonding portion 32 are bent to enhance the anti-friction ability of the first adhesive tape 3 at the corners, thereby extending the life of the first adhesive tape 3 and further extending the life of the battery assembly 100.

[0074] In some embodiments, in addition to providing the first adhesive tape 3 on the first side surface 13 to protect its structure, the battery assembly 100 also includes a second adhesive tape 4, which includes a third bonding portion 41 and a fourth bonding portion 42. One end of the third bonding portion 41 is bonded to the bottom surface 14 of the tail portion, and the other end of the third bonding portion 41 extends along the thickness direction of the battery cell 1 and is bent to the second surface 12 and is bonded to the second surface 12; one end of the fourth bonding portion 42 is connected to the side of the second bonding portion 32 away from the second surface 12 and is bonded to the bottom surface 14, and the other end of the fourth bonding portion 42 extends along the thickness direction of the battery cell 1 and is bent to the first surface 11 and is bonded to the first surface 11. The battery assembly 100 protects the tail portion of the battery cell 1 through the third bonding portion 41 and the fourth bonding portion 42 of the second adhesive tape 4, so as to prevent the tail portion of the battery cell 1 from being deformed or damaged by the impact force when the battery assembly 100 collides or falls with the electronic device.

[0075] In order to reduce the influence of the second adhesive tape 4 on the overall size of the battery assembly 100, by making the length of the fourth bonding portion 42 along the second direction smaller than the length of the third bonding portion 41 along the second direction, it is possible to avoid setting too many fourth bonding portions 42 at the edge of the first surface 11 close to the bottom surface 14, thereby reducing the overall volume of the battery assembly 100 and reducing the space occupied by the battery assembly 100 in the electronic device, thereby providing space for setting other structures of the battery assembly 100 or the electronic device. For example, a FPC (Flexible Printed Circuit), a conductive member or a support member for supporting the battery assembly 100, and a glue for fixing the battery assembly 100 can be arranged at a position where the fourth bonding portion 42 is not arranged on the first surface 11. By using the gap reserved by the fourth bonding portion 42 to set other structures, a reasonable layout of the structure in the battery compartment and the electronic device can be achieved, which is convenient for realizing a lightweight and miniaturized design of the electronic device.

[0076] Exemplarily, the ratio of the length of the fourth fitting portion 42 along the second direction to the width of the first surface 11 along the second direction is less than or equal to 0.5, specifically, it can be 0.4, 0.3, 0.25, 0.2, 0.1, 0.05, etc. Through the above-mentioned size limitation, the fourth fitting portion 42 can achieve enhanced fit with the third fitting portion 41 while minimizing the size of the fourth fitting portion 42, thereby providing more space for the design of other structures.

[0077] At this time, the third bonding part 41 bonded to the bottom surface 14 and the second surface 12 forms a structure similar to an "L" shape, so that the overall thickness of the battery assembly 100 can be regarded as the sum of the thickness of the battery cell 1 and the thickness of the third bonding part 41 bonded to the second surface 12, which helps to achieve a thinning design for the thickness of the battery assembly 100. At the same time, the fourth bonding part 42 bonded to the first surface 11, because the length of the fourth bonding part 42 is less than the length of the third bonding part 41, in the cross section formed by the battery assembly 100 using the surface parallel to the first side surface 13, a structure similar to a "U" shape is formed at the position where the third bonding part 41 and the fourth bonding part 42 are present at the same time, and a structure similar to an "L" shape is formed at the position where only the third bonding part 41 is present. At this time, the thickness of the battery assembly 100 may be different at different positions, and its overall volume is greatly affected by the size of the fourth bonding part 42.

[0078] In order to further reduce the effect of the fourth bonding portion 42 on the overall volume of the battery assembly 100, the end of the fourth bonding portion 42 that is bonded to the first surface 11 can be extended a second distance along the first direction. In this way, the area of ​​the fourth bonding portion 42 that is bonded to the first surface 11 is as small as possible while ensuring the bonding strength, thereby reducing its effect on the overall volume of the battery assembly 100.

[0079] In one example, the second distance may be the same as the thickness of the battery cell 1, or may be smaller than the thickness of the battery cell 1; or the second distance may be the same as the extension width of the third fitting portion 41 fitted on the second surface 12. That is, the second distance may be adjusted according to actual needs and is not limited in this embodiment.

[0080] In another example, the ratio of the second distance to the length of the first surface 11 along the first direction is less than or equal to 0.5, specifically, it can be 0.4, 0.3, 0.25, 0.2, 0.1, 0.05, etc. Through the above-mentioned size limitation, the fourth fitting portion 42 can achieve enhanced fit with the fourth fitting portion 41 while minimizing the size of the fourth fitting portion 42, thereby providing more space for the design of other structures.

[0081] In some embodiments, since the possibility of warping, curling or even loosening of the end of the third fitting portion 41 close to the first surface 11 is different at different positions, the possibility of the above problem occurring at the position where there is more friction with the battery compartment is greater. Therefore, the fourth fitting portion 42 can be multiple, and the multiple fourth fitting portions 42 are arranged at intervals so that the multiple fourth fitting portions 42 are respectively located at the positions where the third fitting portion 41 is prone to warping, curling or even loosening, thereby achieving targeted arrangement of the fourth fitting portion 42, improving the fourth fitting portion 42 to achieve the fitting protection of the third fitting portion 41, while minimizing the total area of ​​the fourth fitting portion 42 as much as possible, thereby reducing the overall volume of the battery assembly 100 to provide more space for the arrangement of other structures.

[0082] Specifically, the above-mentioned multiple fourth fitting parts 42 can be two, three, five or even more, and the spacing between each fourth fitting part 42 can be equal or unequal. The setting position of each fourth fitting part 42 can be based on the position where the third fitting part 41 has poor fitting properties. The position can be obtained through empirical design or through data simulation. In this embodiment, there is no limitation on the specific setting of the multiple fourth fitting parts 42.

[0083] Furthermore, the length of the third fitting portion 41 along the second direction is equal to the length of the bottom surface 14. Since the number of the fourth fitting portions 42 is smaller, the impact on the overall volume of the battery assembly 100 is smaller. In one example, the position where the third fitting portion 41 has poor fit is mainly in the middle. Therefore, there can be two fourth fitting portions 42, and the two fourth fitting portions 42 are respectively located in the middle of the third fitting portion 41 along the second direction. That is, along the second direction, the two fourth fitting portions 42 are spaced apart from the two ends of the third fitting portion 41, so that more space can be reserved for arranging other structures, so as to realize the lightweight and miniaturized design of the electronic device.

[0084] In another example, since the poor adhesion of the third bonding portion 41 is mainly at the end, there can be two fourth bonding portions 42, and the two fourth bonding portions 42 are respectively located at the two ends of the third bonding portion 41 along the second direction. That is, along the second direction, the two ends of the second adhesive tape 4 are "U"-shaped structures, and the middle position is "L"-shaped structure, so that more space can be reserved in the middle for arranging other structures, so as to realize the lightweight and miniaturized design of the electronic device.

[0085] In some embodiments, since the second adhesive tape 4 may rub against the battery compartment, in order to extend the service life of the second adhesive tape 4, the thickness of the third bonding portion 41 and the fourth bonding portion 42 in the portion where the friction is more severe may be increased. For example, the thickness may be increased in the portion where the third bonding portion 41 and the fourth bonding portion 42 are bent to enhance the anti-friction ability of the second adhesive tape 4 at the corners, thereby extending the life of the second adhesive tape 4 and further extending the life of the battery assembly 100.

[0086] Please combine Figures 9 to 11 ,in Fig. 9 It can be a housing structure or a middle frame structure of an electronic device, on which a battery compartment 201 is arranged. Fig.10 and Fig.11 The schematic diagrams are cross-sectional structural diagrams of the battery assembly 100 and the battery compartment 201 when assembled and disassembled.

[0087] When the battery assembly 100 is assembled inside the electronic device, in order to achieve the limiting effect on the battery assembly 100, the battery assembly 100 is often placed in the battery compartment 201 inside the electronic device, and the volume of the battery compartment 201 is usually the same as the volume of the battery assembly 100. Therefore, when the volume of the battery assembly 100 is smaller, the volume of the battery compartment 201 is smaller, which can provide more space for the arrangement of other structures in the electronic device, and can also facilitate the miniaturization design of the electronic device.

[0088] Since the second bonding portion 32 of the first adhesive tape 3 of the battery assembly 100 will inevitably affect the overall thickness of the battery assembly 100, that is, the thickness is greater at the position where the second bonding portion 32 is provided, and the bottom surface of the battery compartment 201 is usually a plane, when the battery assembly 100 is installed in the battery compartment 201, the first contact with the bottom surface of the battery compartment 201 is the second bonding portion 32 provided on the first surface 11. Then, at the position where the second bonding portion 32 is not provided, a gap will be generated between the bottom surface of the battery compartment 201 and the first surface 11. If no other structure is required to be provided in this gap, the gap will be useless space, which will affect the thin and light design of the electronic device.

[0089] In order to solve the above problem, when the first surface 11 is used to face the bottom surface of the battery compartment 201, the first recessed portion 202 can be set at the position of the bottom surface of the battery compartment 201 corresponding to the second fitting portion 32. The first recessed portion 202 is used to accommodate the second fitting portion 32 so that the first surface 11 can be fitted to the bottom surface of the battery compartment 201, thereby eliminating the gap between the first surface 11 and the bottom surface of the battery compartment 201, thereby eliminating the influence of the second fitting portion 32 on the thickness of the electronic device, thereby facilitating the realization of a lightweight design of the electronic device.

[0090] Further, the first recessed portion 202 may be a groove or a through hole slightly larger than the second fitting portion 32, and the first recessed portion 202 may be correspondingly arranged according to the arrangement form of the second fitting portion 32. For example, when the second fitting portion 32 is multiple and arranged at intervals, the first recessed portion 202 may also be multiple and arranged at intervals, so that the interval positions of the multiple first recessed portions 202 can be used to reduce the influence on the structural strength of the bottom of the battery compartment 201; or when the second fitting portion 32 is multiple and arranged at intervals, the first recessed portion 202 may also be one, which can cover the positions of the multiple second fitting portions 32, but in this case, the arrangement area of ​​the first recessed portion 202 will be relatively large, resulting in a greater influence on the structural strength of the bottom of the battery compartment 201, but in this case, since there is no interval structure in the first recessed portion 202, the first recessed portion 202 can adapt to various arrangements of the second fitting portion 32, so that the battery compartment 201 has a strong applicability.

[0091] In addition, since the fourth bonding portion 42 of the second adhesive tape 4 of the battery assembly 100 will inevitably affect the overall thickness of the battery assembly 100, that is, the thickness is greater at the location where the fourth bonding portion 42 is provided, and the bottom surface of the battery compartment 201 is usually a plane, when the battery assembly 100 is installed in the battery compartment 201, the first thing that contacts the bottom surface of the battery compartment 201 is the fourth bonding portion 42 provided on the first surface 11. Then, at the location where the fourth bonding portion 42 is not provided, a gap will be generated between the bottom surface of the battery compartment 201 and the first surface 11. If no other structure is required to be provided in this gap, the gap will be a useless space, which will affect the thin and light design of the electronic device.

[0092] In order to solve the above problem, when the first surface 11 is used to face the bottom surface of the battery compartment 201, a second recessed portion 203 can be set at the position of the bottom surface of the battery compartment 201 corresponding to the fourth fitting portion 42. The second recessed portion 203 is used to accommodate the fourth fitting portion 42 so that the first surface 11 can be fitted to the bottom surface of the battery compartment 201, thereby eliminating the gap between the first surface 11 and the bottom surface of the battery compartment 201, thereby eliminating the influence of the fourth fitting portion 42 on the thickness of the electronic device, thereby facilitating the realization of a lightweight design of the electronic device.

[0093] Further, the second recessed portion 203 may be a groove or a through hole slightly larger than the fourth fitting portion 42, and the second recessed portion 203 may be correspondingly arranged according to the arrangement form of the fourth fitting portion 42. For example, when the fourth fitting portion 42 is multiple and arranged at intervals, the second recessed portion 203 may also be multiple and arranged at intervals, so that the interval positions of the multiple second recessed portions 203 can be used to reduce the influence on the structural strength of the bottom of the battery compartment 201; or when the fourth fitting portion 42 is multiple and arranged at intervals, the second recessed portion 203 may also be one, which can cover the positions of multiple fourth fitting portions 42, but in this case, the arrangement area of ​​the second recessed portion 203 will be relatively large, resulting in a greater influence on the structural strength of the bottom of the battery compartment 201, but in this case, since there is no interval structure in the second recessed portion 203, the second recessed portion 203 can adapt to various arrangements of the fourth fitting portion 42, so that the battery compartment 201 has a strong applicability.

[0094] It is worth noting that if Fig. 9 As shown, when the first recessed portion 202 and the second recessed portion 203 are provided on the bottom surface of the battery compartment 201 at the same time, the first recessed portion 202 near the tail can be connected to the second recessed portion 203; or in other embodiments, they may not be connected, which is not limited in this embodiment.

[0095] Please combine Figure 8 , Fig. 9 and Fig.12 The second aspect of this embodiment discloses an electronic device 200, which includes the battery assembly 100 as described in the first aspect. The electronic device 200 having the battery assembly 100 is easier to achieve a lightweight and miniaturized design while ensuring battery life.

[0096] The above-mentioned electronic device 200 may include but is not limited to a mobile phone, a tablet computer, a laptop computer, an ultra-mobile personal computer (UMPC), a handheld computer, a walkie-talkie, a netbook, a point of sales (POS) machine, a personal digital assistant (PDA), a wearable device, a virtual reality device, a wireless USB flash drive, a Bluetooth speaker / headphone, or a mobile or fixed terminal with a battery such as a vehicle-mounted front-end device, a driving recorder, a security device, etc.

[0097] The electronic device 200 provided in the embodiment of the present application may include a display screen, a back cover, and structures such as a battery assembly 100 and a circuit board located between the display screen and the back cover, and the battery interface of the battery assembly 100 is connected to the circuit board.

[0098] In some examples, the electronic device 200 further includes a housing structure, and the circuit board can be disposed on the housing structure, for example, the circuit board can be disposed on a side of the housing structure facing the back cover, or the circuit board can be disposed on a side of the housing structure facing the display screen, and the display screen and the back cover are respectively located on both sides of the housing structure. The battery assembly 100 can be disposed on a side of the housing structure facing the back cover, or the battery assembly 100 can be disposed on a side of the housing structure facing the display screen, for example, a side of the housing structure facing the back cover can have a battery compartment 201, and the battery assembly 100 is installed in the battery compartment 201.

[0099] When the battery assembly 100 is installed in the battery compartment 201, the first adhesive tape 3 and the second adhesive tape 4 of the battery assembly 100 are closely attached to the side and bottom surface 14 of the battery compartment 201 to absorb the friction from the battery compartment 201 and protect the battery cell 1. At the same time, in order to reduce the impact of the first adhesive tape 3 and the second adhesive tape 4 in the battery assembly 100 on the overall thickness of the electronic device 200, the bottom surface of the battery compartment 201 is provided with a first recessed portion 202 and a second recessed portion 203 corresponding to the second fitting portion 32 of the first adhesive tape 3 and the fourth fitting portion 42 of the second adhesive tape 4, respectively, so that the first recessed portion 202 and the second recessed portion 203 can be used to accommodate the second fitting portion 32 and the fourth fitting portion 42, so as to avoid the thickness of the second fitting portion 32 and the fourth fitting portion 42 affecting the overall thickness of the electronic device 200, thereby facilitating the realization of a lightweight and miniaturized design of the electronic device 200. It can be understood that the arrangement of the first recessed portion 202 and the second recessed portion 203 of the battery compartment 201 can refer to the arrangement method described in the first aspect, and will not be repeated here.

[0100] In some embodiments, the shell structure 204 may include a metal middle plate 2041 and a frame 2042, and the frame 2042 is arranged around the outer periphery of the metal middle plate 2041. Generally, the frame 2042 may include a top frame, a bottom frame, a left frame and a right frame, and the top frame, the bottom frame, the left frame and the right frame form a frame 2042 of a square ring structure. Among them, the material of the metal middle plate 2041 may include but is not limited to aluminum plate, aluminum alloy, stainless steel, steel-aluminum composite die-casting plate, titanium alloy or magnesium alloy. The frame 2042 may be a metal frame, a ceramic frame, or a glass frame. When the frame 2042 is a metal frame, the material of the metal frame may include but is not limited to aluminum alloy, stainless steel, steel-aluminum composite die-casting plate or titanium alloy. Among them, the metal middle plate 2041 and the frame 2042 may be clamped, welded, bonded or integrally formed, or the metal middle plate 2041 and the frame 2042 may be fixedly connected by injection molding. At the same time, the battery compartment 201 can be integrally formed on the metal middle plate 2041 , or can be clipped, welded or bonded to the metal middle plate 2041 .

[0101] The back cover 205 may be a metal back cover 205, a glass back cover 205, a plastic back cover 205, or a ceramic back cover 205. In the embodiment of the present application, the material of the back cover 205 is not limited and is not limited to the above examples.

[0102] It should be noted that, in some examples, the back cover 205 of the electronic device 200 can be connected to the frame to form an integrally formed (unibody) back cover 205. For example, the electronic device 200 may include: a display screen 206, a metal middle plate 2041 and a battery cover. The battery cover can be a back cover 205 formed by the frame and the back cover 205 being integrally formed (unibody), so that the circuit board and the battery assembly 100 are located in the space enclosed by the metal middle plate 2041 and the battery cover.

[0103] The above are only some embodiments and implementation methods of the present application, and the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by any person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A battery assembly, characterized in that: include: Battery cell (1); The battery cell (1) comprises: a first surface (11) and a second surface (12) opposite to each other in a thickness direction, and a first side surface (13) connected between the first surface (11) and the second surface (12) and extending in a first direction, wherein the first direction is a direction from the head of the battery cell (1) to the tail of the battery cell (1); A side seal (2); the side seal (2) is arranged on the first side surface (13) and is bent toward the second surface (12); A first adhesive tape (3), the first adhesive tape (3) comprising a first laminating portion (31) and a second laminating portion (32); One end of the first bonding portion (31) is bonded to the outer surface of the side sealing edge (2), and the other end of the first bonding portion (31) extends along the thickness direction of the battery cell (1) and is bent to the second surface (12), and is bonded to the second surface (12) to close the side sealing edge (2); One end of the second bonding portion (32) is connected to a side of the first bonding portion (31) away from the second surface (12), and is bonded to the outer surface of the side sealing edge (2); the other end of the second bonding portion (32) extends along the thickness direction of the battery cell (1) and is bent to the first surface (11), and is bonded to the first surface (11); Wherein, along the first direction, the length of the second fitting portion (32) is smaller than the length of the first fitting portion (31).

2. The battery assembly according to claim 1, characterized in that: The first surface (11) is used to face the bottom surface of the battery compartment (201); The bottom surface of the battery compartment (201) is provided with a first recessed portion (202) corresponding to the second fitting portion (32), and the first recessed portion (202) is used to accommodate the second fitting portion (32) so that the first surface (11) fits the bottom surface of the battery compartment (201).

3. The battery assembly according to claim 2, characterized in that One end of the second bonding portion (32) bonded to the first surface (11) extends a first distance along a second direction; The second direction is a direction perpendicular to the first direction within the first surface (11).

4. The battery assembly according to claim 3, characterized in that: There are a plurality of the second bonding portions (32), and the plurality of the second bonding portions (32) are arranged at intervals along the first direction.

5. The battery assembly according to claim 4, characterized in that: Along the first direction, the length of the first fitting portion (31) is smaller than the length of the first side surface (13), an end of the first fitting portion (31) close to the head portion and an end of the first side surface (13) close to the head portion are spaced apart, and an end of the first fitting portion (31) close to the tail portion and an end of the first side surface (13) close to the tail portion are spaced apart; There are two second fitting portions (32), and the two second fitting portions (32) are respectively located at two ends of the first fitting portion (31) along the first direction.

6. The battery assembly according to claim 5, characterized in that: The second fitting portion (32) has a width along the second direction; The width of the second fitting portion (32) close to the head portion is greater than the width of the second fitting portion (32) close to the tail portion.

7. The battery assembly according to claim 5, characterized in that: The thickness of the second fitting portion (32) close to the head portion is greater than the thickness of the second fitting portion (32) close to the tail portion.

8. The battery assembly according to claim 4, characterized in that: The second fitting portion (32) has a width along the second direction; When the number of the second fitting portions (32) is greater than two, in any two adjacent second fitting portions (32), the width of the second fitting portion (32) close to the head portion is greater than the width of the second fitting portion (32) close to the tail portion.

9. The battery assembly according to claim 4, characterized in that: When the number of the second fitting parts (32) is greater than two, in any two adjacent second fitting parts (32), the thickness of the second fitting part (32) close to the head is greater than the thickness of the second fitting part (32) close to the tail.

10. The battery assembly according to any one of claims 3 to 9, characterized in that: The battery assembly also includes a second adhesive tape (4); The second adhesive tape (4) comprises a third laminating portion (41) and a fourth laminating portion (42); One end of the third bonding portion (41) is bonded to the bottom surface (14) of the tail portion, and the other end of the third bonding portion (41) extends along the thickness direction of the battery cell (1) and is bent to the second surface (12), and is bonded to the second surface (12); One end of the fourth bonding portion (42) is connected to a side of the second bonding portion (32) away from the second surface (12), and is bonded to the bottom surface (14); the other end of the fourth bonding portion (42) extends along the thickness direction of the battery cell (1) and is bent to the first surface (11), and is bonded to the first surface (11).

11. The battery assembly according to claim 10, characterized in that: When the first surface (11) is used to face the bottom surface of the battery compartment (201), the bottom surface of the battery compartment (201) is provided with a second recessed portion (203) corresponding to the fourth fitting portion (42), and the second recessed portion (203) is used to accommodate the fourth fitting portion (42), so that the first surface (11) is fitted to the bottom surface of the battery compartment (201).

12. The battery assembly according to claim 11, characterized in that: Along the second direction, the length of the fourth fitting portion (42) is smaller than the length of the third fitting portion (41).

13. The battery assembly according to claim 12, characterized in that: One end of the fourth bonding portion (42) bonded to the first surface (11) extends a second distance along the first direction.

14. The battery assembly according to claim 13, characterized in that: There are a plurality of the fourth fitting parts (42), and the plurality of the fourth fitting parts (42) are arranged at intervals along the second direction.

15. The battery assembly according to claim 14, characterized in that: Along the second direction, the length of the third fitting portion (41) is equal to the length of the bottom surface; There are two fourth fitting portions (42), and along the second direction, each of the fourth fitting portions (42) is spaced apart from two ends of the third fitting portion (41).

16. An electronic device, characterized in that: Comprising a battery assembly as described in any one of claims 1-15.

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