Battery assembly and electronic equipment

Abstract

The utility model relates to a battery assembly and electronic equipment, the battery assembly comprises at least two battery cells arranged side by side, each battery cell comprises a shell, the shell comprises a cover plate and a shell body with one side open, the cover plate covers the open side of the shell body, and a flange edge part is formed on the periphery of the open part of the shell body; the cover plates of two adjacent battery cells are positioned on different sides of the battery cells along the thickness direction of the battery cells; an avoiding structure is arranged in an area, corresponding to the flange edge part of the adjacent battery cell, on the shell of each battery cell; and an avoiding space formed by the avoiding structure is used for inserting the flange edge part of the adjacent battery cell. According to the design, the space loss caused by the flange edge parts of the adjacent battery cells can be absorbed, so that the miniaturization design of electronic equipment is facilitated, the improvement of the overall capacity of the battery is also facilitated, and the use experience of a user is further improved.

Description

Technical Field

[0001] The present disclosure relates to the field of electronic devices, and in particular to a battery assembly and electronic devices. Background Art

[0002] With the continuous advancement of technology, more and more electronic devices use steel case batteries. Steel case batteries will cause a certain amount of space loss when setting up dual-cell batteries, which is not conducive to the miniaturization design of electronic devices. Utility Model Content

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a battery assembly and an electronic device.

[0004] According to a first aspect of the present disclosure, a battery assembly is provided, the battery assembly comprising at least two battery cells arranged side by side, each of the battery cells comprising an outer shell, the outer shell comprising a cover plate and a shell having an open side, the cover plate being arranged on the open side of the shell and forming a flange edge portion on the periphery of the open portion of the shell; along the thickness direction of the battery cells, the cover plates of two adjacent battery cells are located on different sides of the battery cells; the areas on the shells of each of the battery cells corresponding to the flange edges of adjacent battery cells are provided with avoidance structures, and the avoidance space formed by the avoidance structure is used to insert the flange edges of adjacent battery cells.

[0005] In some embodiments of the present disclosure, the shell of each of the battery cells includes a first surface, a first step surface, a second step surface, and a second surface connected in sequence, the first surface and the second step surface both face the shell of the adjacent battery cell, the first step surface and the second surface both face away from the cover plate, and along the arrangement direction of the at least two battery cells, the first surface protrudes away from the second surface; wherein the first step surface and the second step surface constitute the avoidance structure, and the flange edge of each of the battery cells close to the adjacent battery cell is opposite to the first step surface of the adjacent battery cell.

[0006] In some embodiments of the present disclosure, a preset gap is provided between the flange edge of each battery cell and the second step surface of an adjacent battery cell.

[0007] In some embodiments of the present disclosure, the first surfaces of the shells of two adjacent battery cells are in contact with each other.

[0008] In some embodiments of the present disclosure, the housing is a steel structure.

[0009] In some embodiments of the present disclosure, the battery assembly includes: a protection circuit board, which is arranged on the same side of each of the battery cells, and the protection circuit board is electrically connected to each of the battery cells.

[0010] In some embodiments of the present disclosure, each of the battery cells is provided with a positive electrode connection portion and a negative electrode connection portion, the negative electrode connection portion is electrically connected to the outer shell of the battery cell where the negative electrode connection portion is located, and the shells of adjacent battery cells are conductively connected; wherein the positive electrode connection portion on each of the battery cells is electrically connected to the protection circuit board, and the negative electrode connection portion on any one of the at least two battery cells is connected to the protection circuit board.

[0011] In some embodiments of the present disclosure, a positive electrode pad corresponding to the positive electrode connection part of each of the battery cells is provided on the protection circuit board, and the positive electrode connection part of the battery cell is welded to the corresponding positive electrode pad; a negative electrode pad is provided on the protection circuit board, and the negative electrode connection part on any one of the at least two battery cells is welded to the negative electrode pad.

[0012] In some embodiments of the present disclosure, the battery assembly further includes a protection device, and the positive electrode connection portion is connected to the protection circuit board through the protection device.

[0013] According to a second aspect of the present disclosure, an electronic device is provided, comprising the battery assembly as described in the first aspect.

[0014] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0015] In the battery assembly provided by the present disclosure, along the thickness direction of the battery cell, the cover plates of two adjacent battery cells are located on different sides of the battery cell, and an avoidance structure is provided in the area corresponding to the flange edge of the adjacent battery cell on the shell of each battery cell, and the flange edge of each battery cell close to the adjacent battery cell extends into the avoidance space formed by the avoidance structure of the adjacent battery cell, thereby reducing the distance between the two adjacent battery cells. Such a design can absorb the space loss caused by the flange edge of the adjacent battery cell, which is not only conducive to the miniaturization design of the electronic device, but also helps to increase the overall capacity of the battery, thereby improving the user experience.

[0016] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0018] Figure 1 It is a structural schematic diagram of a battery cell in the related art;

[0019] Figure 2 It is a main view of a battery cell in the related art;

[0020] Figure 3 It is a bottom view of a battery cell in the related art;

[0021] Figure 4 It is a left view of a battery cell in the related art;

[0022] Figure 5 is a schematic structural diagram of a battery cell according to an exemplary embodiment;

[0023] Figure 6 yes Figure 5 A front view of the battery cell shown;

[0024] Figure 7 yes Figure 5 a bottom view of the battery cell shown;

[0025] Figure 8 yes Figure 5 A left side view of the battery cell shown;

[0026] Fig. 9 is a schematic structural diagram of a battery assembly according to an exemplary embodiment;

[0027] Fig.10 yes Fig. 9 a front view of the battery assembly shown;

[0028] Fig.11 yes Fig. 9 a bottom view of the battery assembly shown;

[0029] Fig.12 yes Fig. 9 a left side view of the battery assembly shown;

[0030] Fig.13 is an exploded schematic diagram of a battery assembly according to an exemplary embodiment.

[0031] In the figure:

[0032] 1-battery assembly; 11-battery cell; 111-positive electrode connection part; 112-negative electrode connection part; 12-outer shell; 121-shell; 1211-first surface; 1212-second surface; 122-cover plate; 123-flange edge; 13-avoidance structure; 131-first step surface; 132-second step surface; 14-protective circuit board; 141-positive electrode pad; 142-negative electrode pad. DETAILED DESCRIPTION

[0033] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0034] With the continuous advancement of technology, more and more electronic devices are using steel-shell batteries. It is understandable that steel-shell batteries are batteries whose outer shell is made of steel. Compared with traditional aluminum-shell batteries, steel-shell batteries have more advantages in safety, temperature resistance and life. At the same time, because the steel shell has the characteristics of corrosion resistance, strong pressure resistance and good sealing, it can also effectively prevent problems such as electrolyte leakage and gas leakage.

[0035] The steel shell battery in the prior art has flange edges on the four sides, for example, Figures 1 to 4 As shown, the battery includes a cell 11 with a shell 12, the shell 12 includes a cover plate 122 and a shell 121 with one side open, the cover plate 122 is covered on the open side of the shell 121, in order to facilitate welding while avoiding damage to the cell 11, the area of ​​the cover plate 122 needs to be larger than the cross-sectional area of ​​the shell 121, therefore, when the cover plate 122 is connected to the shell 121, the cover plate 122 will form a flange edge 123 on the four sides of the shell 121.

[0036] With the development of 5G technology, the functions and usage scenarios of electronic devices such as mobile phones and tablets are becoming more and more abundant, and the battery capacity of electronic devices is also increasing. Therefore, in the related art, the overall capacity of the battery is expanded by setting a dual-cell battery. Exemplarily, two steel shell batteries are spliced ​​to form a dual-cell battery. The presence of the flange edge 123 on the outer shell 12 of the battery cell 11 will cause a certain amount of space loss. For example, the flange edge 123 on the shell 121 abuts against the flange edge 123 of another adjacent battery cell 11, resulting in a large spacing between the two battery cells 11, thereby causing a certain amount of space loss, which is not conducive to the miniaturization design of electronic equipment.

[0037] In order to solve the above technical problems, the present disclosure provides a battery assembly in which the cover plates of two adjacent cells are located on different sides of the cell along the thickness direction of the cell, and an avoidance structure is provided on the shell of each cell in the area corresponding to the flange edge of the adjacent cell, and the flange edge of each cell close to the adjacent cell extends into the avoidance space formed by the avoidance structure of the adjacent cell, thereby reducing the distance between the two adjacent cells. Such a design can absorb the space loss caused by the flange edge of the adjacent cell, which is not only conducive to the miniaturization design of the electronic device, but also helps to improve the overall capacity of the battery, thereby improving the user experience.

[0038] An exemplary embodiment of the present disclosure provides a battery assembly, such as Fig. 9 As shown, the battery assembly 1 includes at least two battery cells 11 arranged side by side. For example, the battery assembly 1 may be provided with two battery cells 11 side by side, or three or more battery cells 11 may be provided side by side. Figures 5 to 8 As shown, each battery cell 11 includes a housing 12, and the housing 12 includes a cover plate 122 and a housing 121 with one side open, and the cover plate 122 is covered on the open side of the housing 121 and forms a flange edge 123 on the outer periphery of the open portion of the housing 121. Exemplarily, the orthographic projection of the housing 121 on the cover plate 122 is located inside the cover plate 122, for example, the housing 121 is a rectangular structure, and the cover plate 122 is also a rectangular structure, and each edge of the cover plate 122 forms a flange edge 123 on the edge of the housing 121 corresponding thereto.

[0039] like Figures 9 to 12 As shown, along the thickness direction of the battery cell 11, the cover plates 122 of two adjacent battery cells 11 are located on different sides of the battery cell 11. For example, when the battery assembly 1 includes two battery cells 11 arranged side by side, namely the first battery cell and the second battery cell, the plane where the cover plate 122 of the first battery cell is located is opposite to but not coincident with the plane where the cover plate 122 of the second battery cell is located. When the battery assembly 1 includes three battery cells 11 arranged side by side, namely the first battery cell, the second battery cell and the third battery cell, the plane where the cover plate 122 of the first battery cell is located is the same plane or parallel to the plane where the cover plate 122 of the third battery cell is located, and the plane where the cover plate 122 of the first battery cell is located is opposite to the plane where the cover plate 122 of the second battery cell is located. By analogy, when a plurality of battery cells 11 are arranged side by side in the battery assembly 1, the planes where the cover plates 122 of each two adjacent battery cells 11 are located are opposite.

[0040] The area on the shell 121 of each battery cell 11 corresponding to the flange edge 123 of the adjacent battery cell 11 is provided with an avoidance structure 13, and the avoidance space formed by the avoidance structure 13 is used to insert the flange edge 123 of the adjacent battery cell 11. Exemplarily, the avoidance structure 13 can be, for example, an inclined surface or a step structure, as long as the flange edge 123 of each battery cell 11 close to the adjacent battery cell 11 can be inserted into the avoidance space formed by the avoidance structure 13 of the adjacent battery cell 11, and the specific setting form of the avoidance structure 13 is not specifically limited.

[0041] Take the battery assembly 1 including two cells 11 arranged side by side as an example for explanation, the two cells 11 include a first cell and a second cell, the area on the shell 121 of the first cell corresponding to the flange edge 123 of the second cell is provided with a avoidance structure 13, and the area on the shell 121 of the second cell corresponding to the flange edge 123 of the first cell is also provided with a avoidance structure 13, when the first cell and the second cell are spliced, the flange edge 123 on the first cell facing the second cell is inserted into the avoidance space formed by the avoidance structure 13 on the second cell, and the flange edge 123 on the second cell on the other side facing the first cell is inserted into the avoidance space formed by the avoidance structure 13 on the first cell. In this way, the distance between the first cell and the second cell is shortened, that is, the surface of one side of the first cell facing the second cell is close to or in contact with the surface of one side of the second cell facing the first cell.

[0042] Such a configuration can absorb the space loss caused by the flange edges 123 of adjacent battery cells 11, which is not only beneficial to the miniaturization design of electronic equipment, but also helps to increase the overall capacity of the battery, thereby improving the user experience.

[0043] like Figure 5 and Fig.11 As shown, in one embodiment, the shell 121 of each battery cell 11 includes a first surface 1211, a first step surface 131, a second step surface 132 and a second surface 1212 which are connected in sequence, the first surface 1211 and the second step surface 132 are both facing the shell 121 of the adjacent battery cell 11, the first step surface 131 and the second surface 1212 are both away from the second surface 1212 of the cover plate 122, and along the arrangement direction of at least two battery cells 11, the first surface 1211 protrudes in the direction away from the second surface 1212.

[0044] The connected first step surface 131 and the second step surface 132 constitute the avoidance structure 13. Such a design makes the avoidance structure 13 simple to set up, easy to process, and easy to control the size, so as to achieve effective avoidance of the flange edge 123. The avoidance structure 13 composed of the first step surface 131 and the second step surface 132 forms an avoidance space. After the flange edge 123 of each battery cell 11 close to the adjacent battery cell 11 extends into the avoidance space on the adjacent battery cell 11, the flange edge 123 is opposite to the first step surface 131 of the adjacent battery cell 11. With such a setting form, the first step surface 131 compensates for the width of the flange edge 123 of the adjacent battery cell 11, so as to achieve the effect of absorbing the space loss caused by the flange edge 123, which is not only conducive to the miniaturization design of electronic equipment, but also helps to improve the overall capacity of the battery, thereby improving the user experience.

[0045] Continue to refer Figure 5 and Fig.11 In one embodiment, after the flange edge 123 of each battery cell 11 close to the adjacent battery cell 11 extends into the avoidance space formed by the avoidance structure 13 on the adjacent battery cell 11, the flange edge 123 abuts against the second step surface 132 of the adjacent battery cell 11. Such a design, on the one hand, makes the structure of the battery assembly 1 more compact, and further reduces the space loss caused by the flange edge 123. On the other hand, it can also prevent the gap between the flange edge 123 and the second step surface 132 of the adjacent battery cell 11 from causing impurities to enter the avoidance space.

[0046] In another embodiment, in one embodiment, after the flange edge 123 of each battery cell 11 close to the adjacent battery cell 11 extends into the avoidance space formed by the avoidance structure 13 on another adjacent battery cell 11, the flange edge 123 and the second step surface 132 of the adjacent battery cell 11 have a preset gap. The preset gap can be, for example, 1mm to 3mm. Such a design provides a safe distance for the assembly between two adjacent battery cells 11. On the one hand, it can effectively prevent the battery cell 11 from being stabbed or damaged by the flange edge 123 on the adjacent battery cell 11, thereby improving the reliability of the battery assembly 1. On the other hand, it can also effectively avoid the situation where the first surfaces 1211 of the shells 121 of the two adjacent battery cells 11 cannot be abutted due to the excessive width of the flange edge 123 on the adjacent battery cell 11, thereby further reducing the distance between the two battery cells 11, making the structure of the battery assembly 1 more compact, thereby reducing the occupation of the internal space of the electronic device.

[0047] Continue to refer Figure 5 and Fig.11In one embodiment, the first surfaces 1211 of the shells 121 of two adjacent battery cells 11 are in contact with each other. This arrangement further reduces the distance between the shells 121 of the two battery cells 11. On the one hand, the structure of the battery assembly 1 is more compact, which reduces the internal space occupied by the battery assembly 1 in the electronic device, thereby facilitating the miniaturization design of the electronic device. On the other hand, the internal volume of the shell 12 of each battery cell 11 can be further expanded, which is beneficial to the improvement of the overall capacity of the battery and enhances the user experience.

[0048] In one embodiment, the housing 12 is a steel structural member. Thus, on the one hand, compared with aluminum materials, steel structural members have more advantages in terms of safety, temperature resistance and life, thereby effectively improving the reliability of the battery assembly 1. On the other hand, since the steel shell has the characteristics of corrosion resistance, strong pressure resistance and good sealing, it can also effectively prevent problems such as electrolyte leakage and gas leakage, further improving the reliability of the battery assembly 1.

[0049] like Fig.13 As shown, in one embodiment, the battery assembly 1 includes a protection circuit board 14, which is arranged on the same side of each battery cell 11, and the protection circuit board 14 is electrically connected to each battery cell 11. Exemplarily, the battery assembly 1 uses an integrated protection circuit board 14 to protect each battery cell 11. For example, the battery assembly 1 includes two battery cells 11 arranged side by side, and the two battery cells 11 constitute a battery cell group. The protection circuit board 14 is arranged on the top of the battery cell group, and the two ends of the protection circuit board 14 extend to the two battery cells 11 respectively, so that the protection circuit board 14 can be electrically connected to the two battery cells 11. Compared with the method of separately arranging the protection circuit board 14 on each battery cell 11, the use of the integrated protection circuit board 14 to protect each battery cell 11 saves the use of the protection circuit board 14, which not only makes the structure of the battery assembly 1 simple, but also can reduce the weight of the battery assembly 1, thereby facilitating the lightweight design of the electronic device, and at the same time, it can also effectively improve the assembly efficiency of the battery assembly 1, thereby improving the production efficiency of the electronic device.

[0050] Continue to refer Fig.13In one embodiment, each battery cell 11 is provided with a positive electrode connection portion 111 and a negative electrode connection portion 112. Exemplarily, the battery cell 11 also includes a positive electrode sheet, a separator and a negative electrode sheet arranged in the housing 12, and an electrolyte filled in the housing 12. The positive electrode connection portion 111 is connected to the positive electrode sheet, and the positive electrode sheet includes a positive electrode collector and a positive electrode material layer. The positive electrode material layer is arranged on the surface of the positive electrode collector. The function of the positive electrode collector is to provide a conductive channel for electrons, so that the positive electrode material layer can be connected to the positive electrode connection portion 111 of the battery cell 11, thereby realizing the flow of electrons. The negative electrode connection portion 112 is connected to the negative electrode sheet, and the negative electrode sheet includes a negative electrode collector and a negative electrode material layer. The negative electrode material layer is arranged on the surface of the negative electrode collector. The function of the negative electrode collector is also to provide a conductive channel for electrons, so that the negative electrode material layer can be connected to the negative electrode connection portion 112 of the battery cell 11, thereby realizing the flow of electrons.

[0051] In this embodiment, the positive electrode connection part 111 on each battery cell 11 passes through the shell 12 of the battery cell 11 to be electrically connected to the protection circuit board 14. The negative electrode connection part 112 is electrically connected to the shell 12 of the battery cell 11 where the negative electrode connection part 112 is located. For example, since the shell 12 of the battery cell 11 is a steel structure, the negative electrode connection part 112 is welded to the shell 12 of the battery cell 11 where it is located, so as to achieve conductive connection between the negative electrode connection part 112 and the shell 12 of the battery cell 11 where it is located.

[0052] At the same time, the first surfaces 1211 of the shells 121 of the two adjacent battery cells 11 are abutted. For example, the shells 12 of each battery cell 11 are steel structural parts. The first surfaces 1211 of the shells 121 of the two adjacent battery cells 11 are welded to achieve the conductive connection between the shells 12 of the two adjacent battery cells 11, so that the shells 12 of each battery cell 11 can be negatively charged at the same time. The voltage of the negative charge carried on the shell 12 is low and will not cause danger to the human body or other structural parts. On this basis, when electrically connected to the protection circuit board 14, only the negative electrode connection part 112 on any one of the at least two battery cells 11 can be connected to the protection circuit board 14. With such a setting form, the use of the pad for the negative electrode connection part 112 on the protection circuit board 14 is reduced, thereby saving the use space of the protection circuit board 14, while facilitating the arrangement of each electrical component, it can also effectively reduce the overall weight of the battery assembly 1, thereby facilitating the lightweight design of the electronic device.

[0053] In addition, in the present embodiment, by electrically connecting the negative electrode connection portion 112 to the outer shell 12 of the battery cell 11 in which it is located, and then connecting the negative electrode connection portion 112 on any one of the at least two battery cells 11 to the protection circuit board 14, it is achieved that the outer shell 12 of each battery cell 11 carries a negative charge at the same time, so as to save the use of the welding pad, and the outer shell 12 of each battery cell 11 will not have corrosion problems, thereby effectively further improving the reliability of the battery assembly 1 and extending the service life of the battery assembly 1, improving the reliability of the electronic device, and further being able to improve the service life of the user.

[0054] Continue to refer Fig.13 In one embodiment, the protection circuit board 14 is provided with positive electrode pads 141 corresponding to the positive electrode connection parts 111 of each battery cell 11, and the positive electrode connection parts 111 of the battery cells 11 are welded to the corresponding positive electrode pads 141. In this way, the electrical connection between each positive electrode connection part 111 and the protection circuit board 14 is achieved. A negative electrode pad 142 is provided on the protection circuit board 14, and the negative electrode connection part 112 on any one of the at least two battery cells 11 is welded to the negative electrode pad 142, so that the shell 12 of each battery cell 11 can be negatively charged at the same time, that is, the electrical connection between the negative electrode connection part 112 of each battery cell 11 and the protection circuit board 14 is achieved. When such a setting form is adopted, the use of pads is saved, thereby saving the use space of the protection circuit board 14, while facilitating the arrangement of each electrical component, it can also effectively reduce the overall weight of the battery assembly 1, thereby facilitating the lightweight design of the electronic device.

[0055] In order to prevent the negative charge on the shell 121 from affecting the performance of the battery assembly 1, in one embodiment, the battery assembly 1 also includes a protection device, and the positive electrode connection part 111 is connected to the protection circuit board 14 through the protection device, so that the positive charge flows through the positive electrode connection part 111, the protection device and the protection circuit board 14, and the negative electrode connection part 112 is directly connected to the protection circuit board 14, and the negative charge does not flow through the protection device, thereby effectively preventing the negative charge from damaging the protection device, thereby effectively ensuring the performance of the battery assembly 1 and improving the reliability of the battery assembly 1.

[0056] An exemplary embodiment of the present disclosure provides an electronic device. By way of example, the electronic device may be a mobile device such as a mobile phone, a tablet computer, a laptop computer, a PDA, a vehicle-mounted electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital assistant (PDA). It may also be a non-mobile device such as a personal computer (PC), a television (TV), a teller machine, or a self-service machine.

[0057] The electronic device comprises the battery assembly 1 as described above, such as Figures 9 to 12 As shown, the battery assembly 1 includes at least two battery cells 11 arranged side by side. Figures 5 to 8 As shown, each battery cell 11 includes a housing 12 , which includes a cover plate 122 and a shell 121 with one side open. The cover plate 122 covers the open side of the shell 121 and forms a flange edge 123 on the outer periphery of the open portion of the shell 121 .

[0058] like Figures 9 to 12 As shown, along the thickness direction of the battery cell 11, the cover plates 122 of two adjacent battery cells 11 are located on different sides of the battery cell 11, and the area corresponding to the flange edge 123 of the adjacent battery cell 11 on the shell 121 of each battery cell 11 is provided with an avoidance structure 13, and the avoidance space formed by the avoidance structure 13 is used to insert the flange edge 123 of the adjacent battery cell 11. With such a setting form, the space loss caused by the flange edge 123 of the adjacent battery cell 11 can be absorbed, which is not only conducive to the miniaturization design of the electronic device, but also helps to increase the overall capacity of the battery, thereby improving the user experience.

[0059] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0060] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A battery assembly, characterized in that: The battery assembly includes at least two cells arranged side by side, each of the cells includes a shell, the shell includes a cover plate and a shell having an open side, the cover plate is arranged on the open side of the shell and forms a flange edge portion on the outer periphery of the open portion of the shell; Along the thickness direction of the battery cell, the cover plates of two adjacent battery cells are located on different sides of the battery cell; An avoidance structure is provided in an area on the shell of each battery cell corresponding to the flange edge of the adjacent battery cell, and the avoidance space formed by the avoidance structure is used for inserting the flange edge of the adjacent battery cell.

2. The battery assembly according to claim 1, characterized in that: The shell of each battery cell comprises a first surface, a first step surface, a second step surface and a second surface which are connected in sequence, the first surface and the second step surface both face the shell of the adjacent battery cell, the first step surface and the second surface both face away from the cover plate, and along the arrangement direction of the at least two battery cells, the first surface protrudes in a direction away from the second surface; The first step surface and the second step surface constitute the avoidance structure, and the flange edge of each battery cell close to the adjacent battery cell is opposite to the first step surface of the adjacent battery cell.

3. The battery assembly according to claim 2, characterized in that: There is a preset gap between the flange edge of each battery cell and the second step surface of the adjacent battery cell.

4. The battery assembly according to claim 2, characterized in that: The first surfaces of the shells of two adjacent battery cells are in contact with each other.

5. The battery assembly according to any one of claims 1 to 4, characterized in that: The shell is a steel structure.

6. The battery assembly according to any one of claims 1 to 4, characterized in that: The battery assembly comprises: A protection circuit board is arranged on the same side of each of the battery cells, and the protection circuit board is electrically connected to each of the battery cells.

7. The battery assembly according to claim 6, characterized in that: Each of the battery cells is provided with a positive electrode connection portion and a negative electrode connection portion, the negative electrode connection portion is electrically connected to the outer shell of the battery cell where the negative electrode connection portion is located, and the shells of adjacent battery cells are electrically connected; Wherein, the positive electrode connection part on each of the battery cells is electrically connected to the protection circuit board, and the negative electrode connection part on any one of the at least two battery cells is connected to the protection circuit board.

8. The battery assembly according to claim 7, characterized in that: The protection circuit board is provided with a positive electrode pad corresponding to the positive electrode connection portion of each of the battery cells, and the positive electrode connection portion of the battery cell is welded to the corresponding positive electrode pad; A negative electrode pad is arranged on the protection circuit board, and a negative electrode connection portion on any one of the at least two battery cells is welded to the negative electrode pad.

9. The battery assembly according to claim 7, characterized in that: The battery assembly further includes a protection device, and the positive electrode connection portion is connected to the protection circuit board through the protection device.

10. An electronic device, characterized in that: The electronic device comprises the battery assembly according to any one of claims 1 to 9.

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