Battery cell cover plate, battery cell and battery cell module

Abstract

The utility model provides a battery cell cover plate, a battery cell and a battery cell module, and relates to the field of battery cell structures. The battery cell cover plate comprises a main body which is of a step-shaped structure; the matching part is arranged at the step of the main body in a surrounding manner and is used for being correspondingly assembled with a shell; arc-shaped structures are formed at the edges of the matching part, and a plurality of positioning bosses protruding in the direction away from the main body are further formed on the matching part. In this way, rubbing between the cover plate and the shell in the assembling process can be effectively avoided; besides, a plurality of positioning bosses protruding in the direction away from the main body are formed on the matching part, and compared with an existing zero-clearance surface matching structure, the battery cell cover plate has the advantages that the positioning bosses are in linear contact fit with the inner wall of the shell, so that the assembly difficulty can be reduced while accurate positioning of the cover plate is realized.

Description

Technical Field

[0001] The present application relates to the field of battery cell structures, and in particular to a battery cell cover, a battery cell and a battery cell module. Background Art

[0002] At present, the matching method of the shell and cover in the battery cell is as follows Figure 1 As shown, in order to facilitate the assembly of the two, an assembly guide angle is designed around the cover plate, and each outer side of the cover plate and the corresponding inner side of the shell are matched with zero clearance. In this way, aluminum wires are easily scratched during the assembly of the cover plate, which poses a great safety hazard. In addition, this assembly structure has high requirements on the precision of the cover plate and the shell, and the assembly efficiency is low. Utility Model Content

[0003] In view of this, the purpose of the present application is to provide a battery cover, a battery cell and a battery cell module to solve the problem that the current assembly method of the battery cover and the shell is easy to scratch aluminum wires and is difficult to assemble.

[0004] According to the above purpose, the utility model provides a battery cover, wherein the battery cover comprises:

[0005] The main body is formed into a step-like structure;

[0006] The matching part is arranged around the step of the main body for corresponding assembly with the shell; the edges of the matching part are all formed into an arc structure, and the matching part is also formed with a plurality of positioning bosses protruding in a direction away from the main body.

[0007] Preferably, the main body is formed with a first plate body and a second plate body connected in sequence, the first plate body and the second plate body are both formed into a rectangular plate structure, and the length and width of the second plate body are respectively smaller than the length and width of the first plate body.

[0008] Preferably, the second plate body is located at the bottom center of the first plate body, so that the distance between each outer side wall of the second plate body and the corresponding outer side wall of the first plate body is equal.

[0009] Preferably, the matching portion surrounds the outer portion of the second plate body and fits with the bottom of the first plate body, so that the matching portion forms a rectangular parallelepiped frame structure.

[0010] Preferably, each side of the matching portion is respectively formed with at least one positioning boss.

[0011] Preferably, when a plurality of the positioning bosses are formed on any side of the matching portion, the plurality of the positioning bosses are evenly distributed at intervals.

[0012] Preferably, the positioning boss is formed as an arched structure protruding in a direction away from the second plate body.

[0013] Preferably, in the bottom end surface of the first plate body, a welding surface is formed between the outer contour of the matching portion and the outer contour of the first plate body, and the minimum width of the welding surface is equal to the wall thickness of the shell.

[0014] According to a second aspect of the utility model, a battery cell is provided, wherein the battery cell comprises the battery cell cover plate as described above.

[0015] According to a third aspect of the utility model, a battery cell module is provided, wherein the battery cell module is provided with the battery cell as described above.

[0016] According to the battery cover plate, battery cell and battery cell module of the utility model, the corresponding assembly of the cover plate and the shell is achieved by means of a matching portion surrounding the outer side of the cover plate main body, and the edges of the matching portion are formed into an arc-shaped structure, thereby effectively avoiding scratches between the cover plate and the shell during assembly; in addition, the matching portion is formed with a plurality of positioning bosses protruding in a direction away from the main body. Compared with the existing zero-gap surface matching structure, the battery cover plate of the present invention is formed into a line contact match between the positioning boss and the inner wall of the shell, thereby being able to achieve precise positioning of the cover plate while reducing the difficulty of assembly.

[0017] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the partial assembly of the cover plate and the housing in the prior art;

[0020] Figure 2 is a schematic diagram of a battery cell cover according to an embodiment of the utility model;

[0021] Figure 3 It is a top view of point A according to an embodiment of the present utility model.

[0022] Icon: 11-first plate; 110-welding surface; 12-second plate; 21-matching part; 22-positioning boss. DETAILED DESCRIPTION

[0023] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0024] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0025] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0026] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0027] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0028] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0029] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0030] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0031] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0032] According to the utility model, a battery cover is provided, such as Figure 2 As shown, the cell cover plate in this embodiment includes a main body and a matching portion arranged around the main body, through which the cover plate and the housing can be assembled correspondingly. In the following, the specific structure of the above-mentioned parts of the cell cover plate according to the utility model will be described in detail.

[0033] In this embodiment, if Figures 2 to 3As shown, the main body is formed into a stepped structure, which is formed with a first plate body 11 and a second plate body 12 connected in sequence, the first plate body 11 and the second plate body 12 are both formed into a rectangular plate structure, and the length and width of the second plate body 12 are respectively smaller than the length and width of the first plate body 11. Further, the second plate body 12 is located at the bottom center of the first plate body 11, so that the distance between each outer side wall of the second plate body 12 and the corresponding outer side wall of the first plate body 11 is equal, thereby increasing the stability and consistency of the overall structure of the main body. However, there is no specific restriction on the specific size of the first plate body 11 and the second plate body 12, which should be determined comprehensively according to actual conditions, such as battery cell specifications.

[0034] In this embodiment, if Figure 2 As shown, the matching portion 21 is arranged around the step of the main body for corresponding assembly with the housing. Specifically, the matching portion 21 surrounds the outer side of the second plate 12 and fits with the bottom of the first plate 11, so that the matching portion 21 forms a rectangular frame structure.

[0035] In addition, the mating portion 21 is also formed with a plurality of positioning bosses 22 protruding in a direction away from the main body, which are used for guiding and positioning during assembly of the cover plate, thereby improving the assembly efficiency and assembly quality of the cover plate. In order to better achieve the technical effect, each side of the mating portion 21 is respectively formed with at least one of the positioning bosses 22. When a plurality of positioning bosses 22 are formed on any side of the mating portion 21, the plurality of positioning bosses 22 are evenly spaced. It should be noted that there are no specific restrictions on the number, formation position and size of the positioning bosses 22, and they should be determined comprehensively according to actual conditions, such as the length of the corresponding side of the mating portion 21, as long as the above-mentioned technical effect can be achieved. In addition, in order to improve the smoothness of the assembly of the cover plate, the positioning boss 22 in the present embodiment is formed as an arched structure protruding in a direction away from the second plate body 12.

[0036] In addition, in this embodiment, in the bottom end surface of the first plate body 11, the outer contour of the matching portion 21 and the outer contour of the first plate body 11 form a welding surface 110, so that the cover plate and the shell can be fixed by welding after being assembled accordingly. Figure 3 As shown, in order to improve the welding effect between the plate cover and the shell, the minimum width (ie D) of the welding surface 110 should be equal to the wall thickness of the shell.

[0037] In addition, each edge of the mating portion 21 is formed into an arc-shaped structure, so as to further avoid scratches between the cover plate and the shell during assembly, and at the same time, it is easier to assemble the cover plate into the shell, that is, the assembly process of the cover plate is smoother.

[0038] According to the battery cell cover plate of the present invention, the corresponding assembly of the cover plate and the shell is achieved through the matching portion 21 surrounding the outer side of the cover plate main body, and the edges of the matching portion 21 are formed into an arc structure, which can effectively avoid the cover plate from being scratched with the shell during assembly; in addition, the matching portion 21 includes a plurality of positioning bosses 22 protruding in the direction away from the main body. Compared with the existing zero-gap surface matching structure, the battery cell cover plate is formed into a line contact match between the positioning boss 22 and the inner wall of the shell, which can reduce the difficulty of assembly while achieving precise positioning of the cover plate.

[0039] According to a second aspect of the utility model, a battery cell is provided, wherein the battery cell comprises the battery cell cover plate as described above.

[0040] According to a third aspect of the utility model, a battery cell module is provided, wherein the battery cell module is provided with the battery cell as described above.

[0041] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A battery cell cover, characterized in that: The battery cover plate comprises: The main body is formed into a step-like structure; The matching part is arranged around the step of the main body for corresponding assembly with the shell; the edges of the matching part are all formed into an arc structure, and the matching part is also formed with a plurality of positioning bosses protruding in a direction away from the main body.

2. The cell cover plate according to claim 1, characterized in that: The main body is formed with a first plate body and a second plate body connected in sequence, the first plate body and the second plate body are both formed into a rectangular plate structure, and the length and width of the second plate body are respectively smaller than the length and width of the first plate body.

3. The cell cover plate according to claim 2, characterized in that: The second plate body is located at the bottom center of the first plate body, so that the distance between each outer side wall of the second plate body and the corresponding outer side wall of the first plate body is equal.

4. The cell cover plate according to claim 3, characterized in that: The matching portion surrounds the outer portion of the second plate body and fits with the bottom of the first plate body, so that the matching portion forms a rectangular parallelepiped frame structure.

5. The cell cover plate according to claim 4, characterized in that: Each side portion of the matching portion is respectively formed with at least one positioning boss.

6. The cell cover plate according to claim 5, characterized in that: When a plurality of the positioning bosses are formed on any side of the matching portion, the plurality of the positioning bosses are evenly distributed at intervals.

7. The cell cover plate according to claim 5, characterized in that: The positioning boss is formed as an arched structure protruding in a direction away from the second plate body.

8. The cell cover plate according to claim 5, characterized in that: In the bottom end surface of the first plate body, a welding surface is formed between the outer contour of the matching portion and the outer contour of the first plate body, and the minimum width of the welding surface is equal to the wall thickness of the shell.

9. A battery cell, characterized in that: The battery cell comprises the battery cell cover plate according to any one of claims 1 to 8.

10. A battery cell module, characterized in that: The battery cell module is provided with the battery cell as claimed in claim 9.

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