Battery shell and battery

Abstract

The utility model discloses a battery case and a battery, and relates to the technical field of batteries. The battery shell comprises an arc-shaped shell body, a cover plate and an electrode assembly, the arc-shaped shell body is provided with an inner cavity with an opening in one end, the shell body comprises a bottom plate and an annular side wall connected with the outer edge of the bottom plate, and the bottom plate comprises a first plate body, a second plate body and a third plate body connected between the first plate body and the second plate body; the second plate body is closer to the opening end of the inner cavity relative to the first plate body; the cover plate is connected with the shell and seals the opening end; the electrode assembly is arranged on the second plate body or the third plate body. The first plate body, the second plate body and the third plate body form a step, the electrode assembly is arranged on the second plate body or the third plate body, namely on the surface of the step, and the shell reserves an accommodating space for subsequent installation, so that the distance between the battery shell and an external component can be smaller, the structure is more compact, and the battery shell is more compact in structure. Therefore, miniaturization of a product with the battery shell is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery shell and a battery. Background Art

[0002] With the development of science and technology, electronic devices are becoming more and more popular. Most electronic devices obtain energy through built-in batteries. In most cases, the battery is square in shape. However, in some electronic devices, due to the special shape of the electronic devices, in order to facilitate installation, the battery needs to be changed according to the shape of the electronic devices. For example, when the battery is applied to products such as smart rings or bracelets, the battery needs to be in a special shape such as an arc to adapt to the internal space shape of the product.

[0003] In the prior art, for example, in the contents disclosed in Chinese Patent No. CN115117521A and Chinese Patent No. CN218677356U, the arc-shaped battery shell is usually divided into two parts, which are connected by multiple shells. Each part needs to be produced separately, and during the assembly process, the shell needs to be connected and fixed multiple times, which affects the production efficiency.

[0004] In addition, the electrodes of curved batteries are usually located at their ends. When connecting, a certain amount of space needs to be left between them and other parts for wire welding and routing. This will occupy the already small space inside the product, making the overall structure less compact and not conducive to the miniaturization of the product.

[0005] Therefore, it is necessary to improve the prior art to overcome the above defects in the prior art. Utility Model Content

[0006] The utility model aims to provide a battery shell and a battery, wherein the battery shell can accommodate part of the wires, thereby facilitating the miniaturization of products using the battery shell.

[0007] In order to achieve the above-mentioned utility model object, the utility model proposes a battery shell, which includes:

[0008] An arc-shaped shell, the shell having an inner cavity with an opening at one end, the shell comprising a bottom plate and an annular side wall connected to the outer edge of the bottom plate, the bottom plate comprising a first plate body, a second plate body and a third plate body connected between the first plate body and the second plate body, the second plate body being closer to the opening end of the inner cavity than the first plate body;

[0009] a cover plate connected to the housing and sealing the open end; and

[0010] The electrode assembly is arranged on the second plate body or the third plate body.

[0011] Furthermore, the shell includes an annular flange connected to the outer end of the annular side wall, and the cover plate is in contact with the annular flange.

[0012] Furthermore, the first plate body and the second plate body are in the shape of flat plates and are arranged in parallel;

[0013] The third plate is in the shape of a flat plate, and is arranged perpendicular to or at an obtuse angle to the first plate and the second plate; or

[0014] The third plate body is in the shape of an arc-shaped plate.

[0015] Furthermore, the electrode assembly is disposed on the second plate body, and a distance between the first plate body and the second plate body is not less than 0.10 mm.

[0016] Further, the annular side wall includes a first plate portion, a second plate portion, a third plate portion and a fourth plate portion, the projections of the first plate portion and the second plate portion on the same plane along the thickness direction of the battery shell are arc-shaped, and the centers of curvature of the two are located on the same side of the shell, and the two ends of the first plate portion and the two ends of the second plate portion are connected respectively through the third plate portion and the fourth plate portion, the fourth plate portion is connected to the second plate body, and the third plate portion is connected to the first plate body;

[0017] The central angle between the first plate portion and the second plate portion is 5° to 270°;

[0018] The shell body further includes a liquid injection hole, and the battery shell further includes a hole cover for sealing the liquid injection hole, and the liquid injection hole is arranged on the third plate portion.

[0019] Furthermore, the electrode assembly includes a positive electrode assembly and a negative electrode sheet;

[0020] The positive electrode assembly comprises a positive electrode column, a conductive sheet arranged in the shell, an inner insulating member separating the conductive sheet from the shell, and an outer insulating member separating the positive electrode column from the shell, wherein the positive electrode column passes through the outer insulating member, the shell and the inner insulating member and is connected to the conductive sheet;

[0021] The negative electrode sheet is attached to the outer surface of the shell.

[0022] Furthermore, the inner insulating member includes a convex portion and a limiting portion protruding toward the cover plate;

[0023] The convex portion has a thickness greater than that of the conductive sheet and is disposed corresponding to a side edge of the conductive sheet;

[0024] The conductive sheet comprises a limiting groove, and the limiting portion is arranged in the limiting groove;

[0025] The outer edge of the conductive sheet does not exceed the outer edge of the inner insulating member.

[0026] Furthermore, the limiting portion is U-shaped, and the limiting groove is adapted to the outer contour of the limiting portion.

[0027] Furthermore, a rounded corner is provided between the second plate body and the third plate body, and the inner insulating member is provided with a curved surface that fits the rounded corner.

[0028] Furthermore, the shell is made of alloy material and is integrally formed.

[0029] Furthermore, the shell is made of stainless steel 316L, and the cover plate is made of the same material as the shell.

[0030] On the other hand, the utility model further provides a battery, which comprises a battery core and the battery shell as described above, wherein the battery core is arranged in the battery shell.

[0031] Compared with the prior art, the utility model has the following beneficial effects: the battery shell includes an arc-shaped shell, a cover plate and an electrode assembly, the shell includes a bottom plate and an annular side wall connected to the outer edge of the bottom plate, the bottom plate includes a first plate body, a second plate body and a third plate body connected between the first plate body and the second plate body, and the second plate body is closer to the opening end of the inner cavity than the first plate body. The first plate body, the second plate body and the third plate body form a step, and the electrode assembly is arranged on the second plate body or the third plate body, that is, on the surface of the step, which reserves space for the subsequent arrangement of the wire, so that the spacing between the battery shell and the external components can be made smaller, and the structure is more compact, which is conducive to the miniaturization of products using the battery shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of a battery shell according to an embodiment of the present utility model.

[0033] Figure 2 yes Figure 1 An exploded view of the battery case is shown.

[0034] Figure 3 yes Figure 1 The battery case shown is a three-dimensional view with the cover removed.

[0035] Figure 4 yes Figure 3 A partial enlarged view of point Ⅰ in the middle. Figure 5 yes Figure 1 A top view of the battery case is shown.

[0036] Figure 6 yes Figure 5 The cross-sectional view is taken along the section line DD.

[0037] Figure 7 It is a cross-sectional view of a battery shell of an embodiment of the utility model. Figure 6 and Figure 7 The connection angles of the third plate body with the first plate body and the second plate body are different.

[0038] Figure 8 It is a cross-sectional view of a battery shell of an embodiment of the utility model. Figure 8 and Figure 6 and Figure 7 The shape of the third plate is different.

[0039] Fig. 9 yes Figure 1 A cross-sectional view of the positive electrode assembly of the battery case shown.

[0040] Fig.10 yes Figure 6 A partial enlarged view of point II in the middle.

[0041] Fig.11 yes Figure 1 Schematic diagram of the inner insulating member of the positive electrode assembly of the battery case shown.

[0042] Fig.12 It is an exploded view of a battery in one embodiment of the utility model.

[0043] Fig.13 This is an exploded view of a battery in one embodiment of the utility model. Fig.12 and Fig.13 The battery cells shown have the same shape. DETAILED DESCRIPTION

[0044] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It is to be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some structures related to the present application are shown in the accompanying drawings, rather than all structures. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0045] The terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0046] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0047] like Figures 1 to 5 As shown, a battery shell corresponding to a preferred embodiment of the utility model includes an arc-shaped shell 1, a cover plate 2 and an electrode assembly 3.

[0048] The arc-shaped shell 1 has an inner cavity 13 with an opening at one end. The shell 1 includes a bottom plate 10 and an annular side wall 11 connected to the outer edge of the bottom plate 10. The bottom plate 10 includes a first plate body 100, a second plate body 101 and a third plate body 102 connected between the first plate body 100 and the second plate body 101. The second plate body 101 is closer to the opening end 110 of the inner cavity 13 than the first plate body 100; the first plate body 100, the second plate body 101 and the third plate body 102 form a step.

[0049] The cover plate 2 is connected to the housing 1 and seals the open end 110 , and can be fixedly connected by welding or gluing, for example.

[0050] The electrode assembly 3 is disposed on the second plate 101 or the third plate 102, that is, disposed on the step surface, and the electrode assembly 3 includes a positive electrode assembly 30 and a negative electrode sheet 31. In some embodiments, Figures 1 to 5 As shown, the electrode assembly 3 is disposed on the second plate 101; in other embodiments, the electrode assembly 3 is disposed on the third plate 102; in still other embodiments, one of the positive electrode assembly 30 and the negative electrode sheet 31 of the electrode assembly 3 is disposed on the second plate 101, and the other is disposed on the third plate 102.

[0051] The first plate 100, the second plate 101 and the third plate 102 are connected in sequence to form a step, and the electrode assembly 3 is arranged on the second plate 101 or the third plate 102, that is, the electrode assembly 3 is arranged on the step surface, and a receiving space 15 can be reserved. In this way, the wire connected to the electrode assembly 3 can be partially located in the receiving space 15, which is convenient for welding and allows the two ends of the battery shell to fit closer to the external components, making the arrangement of the external components more compact, which is conducive to the miniaturization of products using the battery shell (such as smart rings).

[0052] In some embodiments, the housing 1 is made of an alloy material and is integrally formed, thereby improving production efficiency. Optionally, the housing 1 is made of stainless steel material, which has good corrosion resistance and ductility. Further optionally, the material of the housing 1 is stainless steel 316L, and the cover plate 2 is made of the same material as the housing 1. By using an alloy material to make the housing 1, the wall thickness of the housing 1 can be made very thin, so that the housing 1 is lighter and the internal space is larger.

[0053] In some embodiments, the housing 1 is formed by stamping. By using a punch that is adapted to the shape of the housing 1 to stamp a sheet of alloy material, the housing 1 can be formed in one step. Figures 1 to 4 As shown, the housing 1 includes an annular flange 12 connected to the outer end of the annular side wall 11 (i.e., the end where the open end 110 is located), and the cover plate 2 fits the annular flange 12, and the two are connected by, for example, laser welding. The presence of the annular flange 12 is conducive to improving the dimensional accuracy and molding quality of the stamped housing 1, and is not prone to cracking problems, and makes the overall structural strength of the housing 1 higher. In addition, the annular flange 12 protrudes from the annular side wall 11, which facilitates the connection between the cover plate 2 and the housing 1, and is conducive to ensuring the reliability and sealing of the connection.

[0054] In some embodiments, Figure 6 As shown, the first plate 100 and the second plate 101 are arranged in parallel, both of which are flat plates, and the third plate 102 can be flat or arc-shaped. As a feasible implementation method, Figure 6 As shown, the third plate 102 is in the shape of a flat plate and is perpendicular to the first plate 100 and the second plate 101. As another feasible implementation, Figure 7 As shown, the third plate 102 is in the shape of a flat plate, and the third plate 102 is arranged at an obtuse angle with the first plate 100 and the second plate 101. As another feasible implementation, Figure 8 As shown, the third plate body 102 is in an arc-shaped plate shape.

[0055] like Figure 8 As shown, the electrode assembly 3 is arranged on the second plate body 101 , and the spacing C between the first plate body 100 and the second plate body 101 is not less than 0.10 mm, which is conducive to better accommodating the wire connected to the electrode assembly 3 .

[0056] like Figure 1 , Figure 2 , Figure 5 and Figure 6As shown, the annular side wall 11 includes a first plate portion 111, a second plate portion 112, a third plate portion 113 and a fourth plate portion 114. The projection of the first plate portion 111 and the second plate portion 112 on the same plane (such as the plane where the cover plate 2 or the first plate body 100 is located) along the thickness direction A of the battery shell is arc-shaped. It can be understood that the projection plane is perpendicular to the thickness direction A of the battery shell. The center of curvature of the first plate portion 111 and the second plate portion 112 is located on the same side of the shell 1. The two ends of the first plate portion 111 and the two ends of the second plate portion 112 are connected respectively through the third plate portion 113 and the fourth plate portion 114. The fourth plate portion 114 is connected to the second plate body 101, and the third plate portion 113 is connected to the first plate body 100. The four plate portions form a closed ring.

[0057] Figure 1 and Figure 5 In the illustrated embodiment, the projections of the first plate portion 111 and the second plate portion 112 on the same plane along the thickness direction A of the battery shell are concentric arcs, and the center angles B are the same; for example, when a battery including such a battery shell is disposed in a circular ring device such as a ring, the contour of the battery shell is adapted to the device, and the space can be reasonably utilized, making the structure of the device more compact, thereby facilitating the miniaturization of the device. It is understandable that, in some embodiments, the centers of the arc surfaces projected on the same plane by the first plate portion 111 and the second plate portion 112 may be at the same position or at different positions, and similarly, the center angles may be the same or different.

[0058] refer to Figure 3 The shell 1 has a central angle B. Optionally, the central angle B is 5° to 270°.

[0059] The housing 1 further includes a liquid injection hole 14, and the battery housing further includes a hole cover 4 for sealing the liquid injection hole 14, and the liquid injection hole 14 is arranged on the third plate portion 113; Figure 2 As shown, the fourth plate portion 114 is connected to the second plate body 101, and the third plate portion 113 is connected to the first plate body 100. The area of ​​the third plate portion 113 is larger than that of the second plate body 101. Therefore, it is more convenient to open a hole on the third plate portion 113. For example, a hole can be opened by laser cutting, drilling, or punching to form an injection hole 14. In addition, the injection hole 14 is away from the electrode assembly 3, thereby reducing the impact of electrolyte leakage on the electrode assembly 3.

[0060] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Fig. 9As shown, the positive electrode assembly 30 includes a positive electrode column 300, a conductive sheet 301 disposed in the housing 1, an inner insulating member 302 separating the conductive sheet 301 and the housing 1, and an outer insulating member 303 separating the positive electrode column 300 and the housing 1, and the positive electrode column 300 passes through the outer insulating member 303, the housing 1 and the inner insulating member 302 to connect with the conductive sheet 301. The inner insulating member 302 and the outer insulating member 303 are made of insulating materials, and optionally, are made of polymer materials, such as PFA (fluoroplastic) or PP (polypropylene).

[0061] like Fig. 9 As shown, the positive electrode column 300 includes a first fixing portion 3000, a second fixing portion 3001, and a column portion 3002 connected between the first fixing portion 3000 and the second fixing portion 3001. Through holes are provided at corresponding positions of the outer insulating member 303, the second plate body 101, the inner insulating member 302, and the conductive sheet 301; the positive electrode column 300 is penetrated through the through hole, and the first fixing portion 3000 and the second fixing portion 3001 are respectively abutted against the outer insulating member 303 and the conductive sheet 301, and the first fixing portion 3000 and the second fixing portion 3001 are formed by roughening the columnar component, so that the positive electrode column 300 connects the positive electrode assembly 30 to the shell 1 by riveting.

[0062] In some embodiments, at least the positive electrode assembly 30 is disposed on the second plate body 101 . Since the thickness direction of the second plate body 101 is not blocked by other parts of the shell 1 , a hole can be easily opened on the second plate body 101 . Figure 6 In the embodiment, the thickness direction of the second plate body 101 is consistent with the thickness direction A of the battery shell.

[0063] The negative electrode sheet 31 is attached to the outer surface of the housing 1. Figure 1 and Figure 2 In the illustrated embodiment, the negative electrode sheet 31 is attached to the second plate 101 ; the positive electrode assembly 30 and the negative electrode sheet 31 are simultaneously disposed on the second plate 101 , which facilitates wiring and thus improves assembly efficiency.

[0064] The conductive sheet 301 , the positive electrode column 300 and the negative electrode sheet 31 are all made of metal materials. Optionally, the conductive sheet 301 and the positive electrode column 300 are made of aluminum, and the negative electrode sheet 31 is made of nickel.

[0065] like Figure 4 , Figure 6 , Fig.10 and Fig.11 As shown, the inner insulating member 302 includes a protrusion 3020 protruding toward the cover plate 2 and a limiting portion 3021; ​​the thickness of the protrusion 3020 is greater than the thickness of the conductive sheet 301, thereby preventing the conductive sheet 301 from contacting the cover plate 2, thereby protecting the safety of the battery.

[0066] Furthermore, the convex portion 3020 is disposed corresponding to the side of the conductive sheet 301, and can limit one side of the conductive sheet 301, and can prevent the conductive sheet 301 from swinging relative to the inner insulating member 302 to contact the housing 1 and cause a short circuit. Fig.10 and Fig.11 As shown, a convex portion 3020 is provided on one side of the conductive sheet 301. Fig.10 and Fig.11 In the illustrated embodiment, the electrode assembly 3 is disposed on the second plate 101, and the protrusion 3020 is located between the fourth plate 114 and the conductive sheet 301. Even if the conductive sheet 301 swings relative to the inner insulating member 302, it will be blocked by the protrusion 3020, thereby avoiding the risk of short circuit caused by contact between the conductive sheet 301 and the fourth plate 114. It is understandable that when the electrode assembly 3 is disposed on the third plate 102, the protrusion 3020 is located between the first plate 100 and the conductive sheet 301.

[0067] In another embodiment, protrusions 3020 are symmetrically disposed on both sides of the conductive sheet 301 .

[0068] Optionally, the protrusion 3020 is preferably in the shape of an elongated strip and is disposed corresponding to the long side of the conductive sheet 301 .

[0069] The conductive sheet 301 is provided with a through hole, and the positive electrode column 300 is passed through the conductive sheet 301 and is limited by the first fixing part 3000 and the second fixing part 3001 at both ends; when the positive electrode column 300 is loose, the conductive sheet 301 will rotate around the positive electrode column 300. During the rotation process, the conductive sheet 301 will contact the shell 1 and cause a short circuit, thereby affecting the safety of the battery. Figure 2 , Figure 4 and Fig.11 As shown, the conductive sheet 301 includes a limiting groove 3010, and the limiting portion 3021 is disposed in the limiting groove 3010, so that the conductive sheet 301 and the inner insulating member 302 are relatively fixed. Since the outer edge of the conductive sheet 301 does not exceed the outer edge of the inner insulating member 302, even if the inner insulating member 302 rotates due to looseness, the conductive sheet 301 will not contact the housing 1.

[0070] Further, such as Figure 2 , Figure 4 and Fig. 9 As shown, the limiting portion 3021 is U-shaped for easy processing. It is understandable that the shape of the limiting portion 3021 can be selected according to actual conditions. The limiting groove 3010 is adapted to the outer contour of the limiting portion 3021, thereby improving the stability of the position of the conductive sheet 301.

[0071] like Figure 6 and Fig.10As shown, a fillet 1010 is provided between the second plate body 101 and the third plate body 102 , and the inner insulator 302 is provided with an arc surface 3022 that fits the fillet 1010 , which can improve the position stability of the inner insulator 302 and prevent it from rotating toward the fourth plate portion 114 .

[0072] The utility model also proposes a battery, such as Figure 3 , Figure 7 and Fig.12 As shown, the battery includes a battery cell 5 and a battery shell as described above, and the battery cell 5 is arranged in the battery shell.

[0073] Fig.12 In the illustrated embodiment, the electrode assembly 3 is arranged on the second plate body 101, the third plate body 102 is plate-shaped, the third plate body 102 is arranged perpendicular to the first plate body 100 and the second plate body 101, the inner cavity 13 includes a first cavity 130 and a second cavity 131 arranged on both sides of the third plate body 102, and the shape of the battery cell 5 is adapted to the first cavity 130 and is arranged in the first cavity 130.

[0074] It is understandable that the shape of the battery cell 5 can be adapted to the inner cavity 13, such as Figure 3 , Figure 7 and Fig.13 As shown, at this time, the battery cell 5 partially extends into the second cavity 131, thereby increasing the battery storage capacity.

[0075] The above are only specific implementations of the present invention, and any improvements made based on the concept of the present invention are considered to be within the protection scope of the present invention.

Claims

1. A battery shell, characterized in that: include: An arc-shaped shell (1), the shell (1) having an inner cavity (13) with an opening at one end, the shell (1) comprising a bottom plate (10) and an annular side wall (11) connected to the outer edge of the bottom plate (10), the bottom plate (10) comprising a first plate body (100), a second plate body (101) and a third plate body (102) connected between the first plate body (100) and the second plate body (101), the second plate body (101) being closer to the opening end (110) of the inner cavity (13) than the first plate body (100); a cover plate (2), connected to the housing (1) and sealing the open end (110); and The electrode assembly (3) is arranged on the second plate body (101) or the third plate body (102).

2. The battery case according to claim 1, wherein: The housing (1) comprises an annular flange (12) connected to the outer end of the annular side wall (11), and the cover plate (2) is in contact with the annular flange (12).

3. The battery case according to claim 1, wherein: The first plate body (100) and the second plate body (101) are in the shape of flat plates and are arranged in parallel; The third plate (102) is in the shape of a flat plate, and the third plate (102) is perpendicular to or at an obtuse angle to the first plate (100) and the second plate (101); or, The third plate body (102) is in the shape of an arc-shaped plate.

4. The battery case according to claim 1, characterized in that The electrode assembly (3) is arranged on the second plate body (101), and the distance between the first plate body (100) and the second plate body (101) is not less than 0.10 mm.

5. The battery case according to claim 1, wherein: The annular side wall (11) comprises a first plate portion (111), a second plate portion (112), a third plate portion (113) and a fourth plate portion (114); the projections of the first plate portion (111) and the second plate portion (112) on the same plane along the thickness direction of the battery shell are arc-shaped, and the centers of curvature of the two are located on the same side of the shell (1); the two ends of the first plate portion (111) and the two ends of the second plate portion (112) are connected respectively through the third plate portion (113) and the fourth plate portion (114); the fourth plate portion (114) is connected to the second plate body (101), and the third plate portion (113) is connected to the first plate body (100); The central angle between the first plate portion (111) and the second plate portion (112) is 5° to 270°; The housing (1) further comprises a liquid injection hole (14), and the battery shell further comprises a hole cover (4) for sealing the liquid injection hole (14); the liquid injection hole (14) is arranged on the third plate portion (113).

6. The battery case according to claim 1, wherein: The electrode assembly (3) comprises a positive electrode assembly (30) and a negative electrode sheet (31); The positive electrode assembly (30) comprises a positive electrode column (300), a conductive sheet (301) arranged in the shell (1), an inner insulating member (302) separating the conductive sheet (301) and the shell (1), and an outer insulating member (303) separating the positive electrode column (300) and the shell (1), wherein the positive electrode column (300) passes through the outer insulating member (303), the shell (1) and the inner insulating member (302) to be connected to the conductive sheet (301); The negative electrode sheet (31) is attached to the outer surface of the shell (1).

7. The battery case according to claim 6, characterized in that: The inner insulating member (302) comprises a convex portion (3020) protruding toward the cover plate (2) and a limiting portion (3021); The thickness of the convex portion (3020) is greater than the thickness of the conductive sheet (301), and is arranged corresponding to the side edge of the conductive sheet (301); The conductive sheet (301) comprises a limiting groove (3010), and the limiting portion (3021) is arranged in the limiting groove (3010); The outer edge of the conductive sheet (301) does not exceed the outer edge of the inner insulating member (302).

8. The battery case according to claim 7, wherein: The limiting portion (3021) is U-shaped, and the limiting groove (3010) is adapted to the outer contour of the limiting portion (3021).

9. The battery case according to claim 7, characterized in that: A rounded corner (1010) is provided between the second plate body (101) and the third plate body (102), and the inner insulating member (302) is provided with a curved surface (3022) that fits the rounded corner (1010).

10. The battery case according to any one of claims 1 to 9, characterized in that: The shell (1) is made of alloy material and is integrally formed.

11. The battery case according to claim 10, characterized in that: The shell (1) is made of stainless steel 316L, and the cover plate (2) is made of the same material as the shell (1).

12. A battery, characterized in that: It comprises a battery cell (5) and a battery shell according to any one of claims 1 to 11, wherein the battery cell (5) is arranged in the battery shell.

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