Battery shell, battery and electric equipment

Abstract

The utility model relates to a battery shell, a battery and electric equipment. The battery shell comprises a shell body and a shell cover, a cavity for accommodating a battery cell is formed in the shell body, and one side of the shell body is provided with an opening communicated with the cavity; the shell cover covers the opening of the shell, the edge of the shell cover is matched with the edge of the opening through a clamping structure, and the clamping structure is used for stabilizing the relative position between the shell cover and the shell. According to the scheme provided by the invention, the shell cover and the shell support each other through the clamping structure, so that the deformation of the shell can be effectively limited, and the assembly precision between the shell cover and the shell can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy, in particular to a battery shell, a battery and an electric device. BACKGROUND

[0002] A steel shell battery is a battery with a shell made of steel material. The steel shell can provide certain protection for the chemicals and structures inside the battery, making it more durable and resistant to physical impact and environmental factors. Steel shell batteries are commonly used in various electronic devices, power tools and other fields.

[0003] In related technologies, the steel shell shell of the steel shell battery is generally made by stamping forming. After stamping and drawing, the shell opening of the shell is prone to deformation. This deformation leads to poor assembly precision between the steel shell shell and the shell cover. UTILITY MODEL CONTENT

[0004] To solve or partially solve the problems in the related art, the present application provides a battery shell, a battery and an electric device. The shell cover and the shell of the battery shell are supported by the clamping structure, which can effectively limit the deformation of the shell and improve the assembly precision between the shell cover and the shell.

[0005] The first aspect of the present application provides a battery shell, comprising:

[0006] a shell, the shell forms a cavity for accommodating a battery cell inside, one side of the shell has an opening communicating with the cavity;

[0007] a shell cover covering the opening of the shell, the edge of the shell cover is matched with the edge of the opening through a clamping structure, and the clamping structure is used to stabilize the relative position between the shell cover and the shell.

[0008] In an implementation manner, the clamping structure comprises a flange provided on the edge of the shell cover and a groove provided at the corresponding position of the shell and the flange, and the flange and the groove are matched in concave-convex.

[0009] In an implementation manner, the shell cover comprises a main body, the flange protrudes from the main body in a direction away from the main body, the main body of the shell cover is accommodated in the shell, and the edge of the main body is connected with the inner wall of the shell;

[0010] the flange extends into the groove, the bottom wall of the groove is used to support the flange, and the side wall of the groove is connected with the flange.

[0011] In an implementation manner, the longitudinal depth of the groove is greater than or equal to the thickness of the shell cover; or,

[0012] The flange has a protruding distance from the main body that is less than or equal to the thickness of the shell side wall.

[0013] In an implementation, a fitting gap between the flange and the groove wall is ≤0.02mm.

[0014] In an implementation, the shell cover has a first width W1 at the flange, the opposite outer side wall of the shell has a second width W2, and W2-W1≤0.05mm; and / or,

[0015] The shell cover has a third width W3 at a region outside the flange, the opposite inner side wall of the shell has a fourth width W4, and W4-W3≤0.05mm.

[0016] In an implementation, the shell cover and the shell are provided with a welding portion at a position where the shell cover and the shell longitudinally and / or laterally meet, and the shell cover and the shell are fixedly connected by welding at the welding portion.

[0017] In an implementation, the shell is square, and the number of the engaging structures is multiple, and the multiple engaging structures are distributed at four side edges of the shell.

[0018] The second aspect of the present application provides a battery, comprising:

[0019] a battery cell; and

[0020] The battery shell as described in the first aspect above, wherein the battery cell is accommodated in the battery shell.

[0021] The third aspect of the present application provides a power consumption device, comprising the battery as described in the second aspect above.

[0022] The technical solution provided by the present application can have the following beneficial effects:

[0023] In the solution provided by the present application, the edge of the shell cover is matched with the edge of the opening through the engaging structure, the engaging structure can stabilize the relative position between the shell cover and the shell, and the mutual support of the shell cover and the shell through the engaging structure can effectively limit the deformation of the shell, thereby improving the assembly precision between the shell and the shell cover.

[0024] Further, in the solution provided by the present application, the longitudinal welding portion and the lateral welding portion are respectively used to fix the shell cover and the shell in the longitudinal direction and the lateral direction by welding. Since the shell cover and the shell are assembled through the engaging structure, the assembly position is more accurate, and the welding precision is also higher. In the application scenario of large-size battery cells, the deformation of the shell can be limited through the matching of the shell cover and the shell, thereby improving the manufacturability of large-size steel shell batteries.

[0025] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application, as claimed. BRIEF DESCRIPTION OF DRAWINGS

[0026] The above and other objects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings in which like reference characters refer to like parts throughout and in which:

[0027] Figure 1 is a structural schematic diagram of a shell shown in an embodiment of the present application;

[0028] Figure 2 is a structural schematic diagram of a shell cover shown in an embodiment of the present application;

[0029] Figure 3 is an assembly schematic diagram of a shell and a shell cover shown in an embodiment of the present application;

[0030] Figure 4 is Figure 3 a cross-sectional schematic diagram along A-A in an embodiment;

[0031] Figure 5 is Figure 3 a cross-sectional schematic diagram along B-B in an embodiment;

[0032] Figure 6 is Figure 3 a welding schematic diagram along A-A in an embodiment;

[0033] Figure 7 is Figure 3 a welding schematic diagram along B-B in an embodiment.

[0034] Reference numerals: 100, shell; 110, bottom wall; 120, side wall; 121, groove; 200, shell cover; 210, main body; 211, flange; 212, main body edge; 310, transverse welding portion; 320, longitudinal welding portion. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present application will be described herein below with reference to the accompanying drawings. While the preferred embodiments of the present application are shown in the drawings, it is understood that the present application can be embodied in many forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art.

[0036] The terminology used in this application, for the purpose of describing particular embodiments, is not intended to be limiting. As used in this application, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "and / or," as used herein, refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0037] It should be understood that, although the terms "first", "second", "third" and the like can be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another type of information. For example, without departing from the scope of the present application, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0038] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0039] Unless otherwise expressly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, they can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In the related art, the steel shell body of the steel shell battery is generally made by stamping forming. After stamping and drawing, the shell opening of the shell body is prone to deformation, which leads to poor assembly or welding precision between the steel shell body and the shell cover. To solve the above problems, the present application provides a battery shell, a battery and an electrical equipment. The shell cover and the shell of the battery shell are supported by the clamping structure, which can effectively limit the deformation of the shell, and improve the assembly precision between the shell cover and the shell.

[0041] The technical solutions of the embodiments of the present application are described in detail below with reference to the drawings.

[0042] Figure 1 is a structural schematic diagram of a shell shown in the embodiments of the present application; Figure 2 is a structural schematic diagram of a shell cover shown in the embodiments of the present application; Figure 3 is an assembly schematic diagram of the shell and the shell cover shown in the embodiments of the present application.

[0043] Referring to Figures 1-3 The present application provides a battery shell 100, which comprises a shell 100 and a shell cover 200. The shell 100 has a cavity for accommodating an electric core formed therein. One side of the shell 100 has an opening communicating with the cavity. The shell cover 200 is combined with the opening of the shell 100. The edge 212 of the shell cover 200 is matched with the edge of the opening through a clamping structure. The clamping structure is used to stabilize the relative position between the shell cover 200 and the shell 100.

[0044] The battery shell 100 of the present application is made of steel. The shell 100 has a bottom wall 110 and a side wall 120 connected with the bottom wall 110. The top of the shell 100 is provided with an opening. The opening is an open opening. The shape of the shell cover 200 is matched with the shape of the opening. The shell cover 200 can close the opening, so as to form a sealed space for accommodating the electric core in the shell 100.

[0045] In the present application, the shell cover 200 is a plate structure. The edge 212 of the shell cover 200 is matched with the edge of the opening through the clamping structure. The clamping structure can stabilize the relative position between the shell cover 200 and the shell 100. The shell cover 200 and the shell 100 are supported by the clamping structure, which can effectively limit the deformation of the shell 100 and improve the assembly precision between the steel shell 100 and the shell cover 200.

[0046] In some embodiments, the supporting structure comprises a flange 211 arranged at the edge 212 of the shell cover 200 and a groove 121 arranged at the shell wall corresponding to the flange 211. The flange 211 and the groove 121 are matched with each other.

[0047] The shell cover 200 comprises a main body 210. The flange 211 is arranged at the edge of the main body 210. The shell cover 200 and the shell 100 are matched with each other, which can realize more accurate assembly and positioning between the shell cover 200 and the shell 100. That is, the groove 121 and the flange 211 are matched with each other, so that the shell cover 200 can be accurately positioned at the predetermined position of the shell 100. The positional deviation in the assembly process is effectively avoided, and the assembly precision between the shell 100 and the shell cover 200 is improved.

[0048] Referring to Figure 1 and Figure 2The shell cover 200 is in a plate structure, the groove 121 is recessed in the direction of the bottom of the shell 100 or the height direction, the flange 211 is formed by the partial extension of the main body 210 in the plane direction of the main body 210 by a preset distance, and the plane direction of the main body 210 includes the width and length directions of the shell cover 200.

[0049] Referring to Figure 3 The shell cover 200 is in a plate structure, the shell 100 is in a box structure, the shell 100 includes a bottom wall 110 and a side wall 120 surrounding the bottom wall 110 and connected with the bottom wall 110, the shell 100 forms an opening at the top opposite to the bottom wall 110, and the main body 210 of the shell cover 200 is assembled into the shell 100 from top to bottom through the opening and is at least partially accommodated in the shell 100.

[0050] The shell has preset length, width and height dimensions, the width direction is the X-axis direction of the coordinate system, the length direction is the Y-axis direction of the coordinate system, and the height direction is the Z-axis direction of the coordinate system. In this embodiment, the area of the main body 210 of the shell cover 200 is smaller than the area of the opening of the shell 100, so that the main body 210 of the shell cover can be accommodated in the opening.

[0051] In this embodiment, in the state of being accommodated in the shell 100, the edge 212 of the main body 210 of the shell cover 200 is connected with the side wall 120 of the shell 100 at the opening, the flange 211 extends into the groove 121 in the extension direction of the plane of the shell cover 200, that is, extends into the groove 121 in the direction perpendicular to the side wall 120 of the shell, at the same time, the bottom wall of the groove supports the flange in the height direction, thereby limiting the shell 100 and the shell cover 200 in the height direction, the side wall of the groove contacts the length direction of the flange shell, thereby limiting the shell 100 and the shell cover 200 in the length direction, the edge 212 of the main body 210 of the shell is connected with the side wall 120 of the shell at the corresponding position in the width and length directions, thereby limiting the shell cover and the shell in the length, width and height directions, limiting the deformation of the side wall 120 of the shell in the length and width directions, so that the assembly precision between the shell cover 200 and the shell 100 is higher, and the combination is more stable.

[0052] In this embodiment, the recess depth of the groove 121 is greater than or equal to the thickness of the shell cover 200, in the height direction of the shell 100, the shell cover 200 can be completely embedded in the shell 100, and does not protrude from the top of the shell 100, that is, the shell cover 200 does not exceed the top surface of the shell 100, and the contact area between the shell cover 200 and the shell 100 is larger, further improving the assembly stability of the shell cover 200 in the shell 100, so that the overall structure composed of the shell 100 and the shell cover 200 is not easy to deform.

[0053] In some embodiments, the length of the flange 211 along the direction in which the shell cover 200 extends in the plane is less than or equal to the thickness of the shell wall, so that the flange 211 is completely accommodated in the groove 121 and does not protrude from the side of the shell 100, i.e., the flange 211 does not protrude beyond the side surface of the shell 100, thereby ensuring the flatness of the outer surface of the shell 100.

[0054] In some embodiments, the groove 121 can be a rectangular groove, a circular groove, a polygonal groove or a groove with a special shape, and the flange 211 is shaped to match the shape of the groove 121, so that the outer side wall 120 of the flange 211 can be in close contact with the inner wall of the groove 121. The gap between the flange 211 and the groove wall of the groove 121 is less than or equal to 0.02 mm, so that the flange 211 and the groove 121 are more tightly engaged and have higher stability.

[0055] In some embodiments, the matching structure, i.e., the engagement structure, of the flange 211 and the groove 121 can be provided in multiple numbers between the shell cover 200 and the shell 100, for example, multiple engagement structures are distributed around the shell 100 and the shell cover 200, thereby improving the assembly accuracy around the shell. Specifically, when the shell 100 is square, the engagement structure is provided at the connection between the shell 100 and the shell cover 200 on each side, and is arranged close to the middle of each side connection; or, two or more than two engagement structures are provided at each side in a spaced distribution. It should be noted that the shape of the shell is not limited in the present application, and the number of engagement structures provided on the shell is also not limited.

[0056] Figure 4 is Figure 3 A cross-sectional view along A-A in the embodiment; Figure 5 is Figure 3 A cross-sectional view along B-B in the embodiment.

[0057] Referring to Figure 3 , Figure 4 and Figure 5In some embodiments, the two opposite sides of the shell cover 200 are provided with flanges 211, the shell cover 200 has a first width W1 at the flanges 211, the opposite outer side walls 120 of the shell body 100 have a second width W2, W2-W1≤0.05mm; the shell cover 200 has a third width W3 outside the flanges 211, the opposite inner side walls 120 of the shell body 100 have a fourth width W4, W4-W3≤0.05mm, so that the flanges 211 of the shell cover 200 do not exceed the side walls 120 of the shell body 100 in the transverse direction, the edge 212 area of the shell body 100 outside the flanges 211 is smaller than the internal size of the steel shell, the edge 212 area of the shell body 100 outside the flanges 211 is in contact with the inner side walls 120 of the shell body 100, supporting each other in the transverse direction, not only improving the appearance flatness of the shell body 100, but also making the position of the shell cover 200 in the shell body 100 more stable, avoiding relative displacement between the shell cover 200 and the shell body 100, and further improving the assembly precision.

[0058] In related technologies, the shell cover is generally protruding from the top of the shell body and is arranged with the shell body, and the shell cover and the end face of the shell body side wall are connected in a vertical welding manner. This connection manner has high precision requirements for the deformation amount of the end face of the shell body side wall. After the steel shell is punched and drawn, the deformation amount of the steel shell with a length or width size greater than 50mm makes it difficult to accurately align the shell cover and the shell body, which does not meet the welding requirements of the steel shell. If the size of the shell body is larger, the deformation amount is also larger, which makes it difficult to be applied to the scene of large-size battery cells.

[0059] Figure 6 is Figure 3 the welding schematic view along A-A in the embodiment; Figure 7 is Figure 3 the welding schematic view along B-B in the embodiment.

[0060] Referring to Figure 6 and Figure 7 , the scheme of the present application is that the part where the shell cover 200 and the shell body 100 meet in the longitudinal and / or transverse direction is provided with a welding part, and the shell cover 200 and the shell body 100 are fixedly connected through welding at the welding part. Specifically, the process of laser welding can be used for connection.

[0061] The welding part includes a longitudinal welding part 320 where the shell cover 200 and the shell body 100 are in contact in the longitudinal direction, and a transverse welding part 310 where the shell cover 200 and the shell body 100 are in contact in the transverse direction. The longitudinal welding part 320 is the part where the flange 211 and the bottom wall 110 of the groove 121 are in contact, and the transverse welding part 310 is the part where the side of the shell cover 200 outside the flange 211 and the inner side wall 120 of the shell body 100 are in contact. In this way, the shell cover 200 and the shell body 100 can be fixed by welding in the longitudinal and transverse directions through the longitudinal welding part 320 and the transverse welding part 310, respectively. Since the assembly precision between the shell cover 200 and the shell body 100 is higher, the welding precision is also higher. In the application scenario of large-size battery cells, the deformation of the shell body 100 can be limited by the cooperation of the shell cover 200 and the shell body 100, thereby improving the manufacturability of large-size steel shell batteries.

[0062] The application provides a battery, which includes a battery cell and a battery shell 100 according to any one of the above embodiments. The battery of the application has higher position precision between the shell cover 200 and the shell body 100, which can improve the assembly precision and welding effect between the shell cover 200 and the shell body 100, and can realize a larger battery size, for example, the length or width size of the battery shell 100 of the application is greater than 50 mm, and the precise assembly of the shell cover 200 and the shell body 100 can be ensured.

[0063] The application also provides an electric device, which includes the battery described above. The battery provides electric energy for the electric device, and the electric device includes a body, and the body is provided with the battery according to the above embodiments. The electric device can be a mobile communication device, a sound equipment, a game machine, a smart door lock, etc., but is not limited thereto. The above has described the embodiments of the application, and the above description is exemplary, is not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of the terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements to the technology in the market, or to enable other ordinary skilled persons in the art to understand the embodiments disclosed herein.

Claims

1. A battery case characterized by comprising: The battery shell comprises: a shell body, in which a cavity is formed for accommodating an electric core, one side of the shell body having an opening communicating with the cavity; a shell cover covering the opening of the shell body, the edge of the shell cover being matched with the edge of the opening through a snap structure, the snap structure being used for stabilizing the relative position between the shell cover and the shell body.

2. The battery shell according to claim 1, wherein: the snap structure comprises a flange provided on the edge of the shell cover and a groove provided on the shell body corresponding to the flange, the flange and the groove being matched in a concave-convex manner.

3. The battery shell according to claim 2, wherein: the shell cover comprises a main body, the flange protruding from the main body in a direction away from the main body, the main body of the shell cover being accommodated in the shell body, the edge of the main body being in contact with the inner wall of the shell body; the flange extends into the groove, the bottom wall of the groove being used for supporting the flange, the side wall of the groove being in contact with the flange.

4. The battery shell according to claim 3, wherein: the longitudinal depth of the groove is greater than or equal to the thickness of the shell cover; or the protruding distance of the flange from the main body is less than or equal to the thickness of the side wall of the shell body.

5. The battery shell according to claim 3, wherein: the matching gap between the flange and the groove wall is ≤0.02mm.

6. The battery shell according to claim 3, wherein: the shell cover has a first width W1 at the flange, the opposite outer side wall of the shell body has a second width W2, W2-W1≤0.05mm; and / or the shell cover has a third width W3 in the area outside the flange, the opposite inner side wall of the shell body has a fourth width W4, W4-W3≤0.05mm.

7. The battery shell according to claim 1, wherein: the part where the shell cover and the shell body are in contact in the longitudinal and / or transverse direction is provided with a welding part, the shell cover and the shell body are fixedly connected through welding at the welding part.

8. The battery shell according to any one of claims 1-7, wherein: the shell body is square, the number of the snap structures is multiple, and the multiple snap structures are distributed at the four side edges of the shell body.

9. A battery, characterized by The battery comprises: an electric core; and the battery shell according to any one of claims 1-8, the electric core being accommodated in the battery shell.

10. An electric device, characterized by The battery comprises the battery according to claim 9.

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