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 pole; the plate body assembly is arranged on the outer side part of the pole in a sleeving manner; the plate body assembly comprises a riveting block; an identification part is formed on the outer surface of the riveting block; the riveting block is also provided with a variable-diameter hole corresponding to the pole, and the large-diameter end of the variable-diameter hole is close to the top end of the pole in the axial direction. When the riveting block and the pole are assembled, whether the riveting block is correctly assembled or not can be efficiently judged according to the position of the identification part, so that the large-diameter end of the variable-diameter hole of the riveting block is close to the top end of the pole in the axis direction, the pole is conveniently riveted, and the sealing performance and riveting strength of the joint of the pole and the riveting block can be ensured; therefore, the yield and the safety performance of the battery cell are improved.

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] The rivet block in the existing battery cover is set on the outer side of the pole through the diameter-changing hole. However, during the assembly process, the rivet block is often installed upside down (such as Figure 1 The error is not easy to identify, which will lead to insufficient sealing performance and stability of the cover (a large gap exists between the rivet block and the pole), affecting the yield rate and safety performance of the battery cell. 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 riveted blocks in the existing battery cover are easily installed upside down during the assembly process.

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

[0005] poles; and

[0006] A plate assembly is sleeved on the outer side of the pole; the plate assembly includes a rivet block; an identification portion is formed on the outer surface of the rivet block; the rivet block is also formed with a diameter-changing hole corresponding to the pole, and the large-diameter end of the diameter-changing hole is close to the top end of the pole axis direction.

[0007] Preferably, the diameter-reducing hole is formed as a through hole penetrating the top end and the bottom end of the riveting block.

[0008] Preferably, the large diameter end of the reducing hole passes through the top end of the riveting block, and the small diameter end of the reducing hole passes through the bottom end of the riveting block.

[0009] Preferably, the identification portion is located at an end surface of a top end of the riveting block; and the identification portion includes at least one groove.

[0010] Preferably, when there are multiple grooves, the multiple grooves are evenly distributed on the outer peripheral side of the variable diameter hole.

[0011] Preferably, the groove is formed as a columnar groove and / or a rectangular parallelepiped groove.

[0012] Preferably, the riveting block and the pole are riveted together, and after the pole is riveted, the pole is adapted to correspond to the diameter-changing hole.

[0013] Preferably, a sink groove for riveting is further formed at the top of the riveting block, and the variable diameter hole runs through the bottom of the sink groove; the inner diameter of the sink groove is larger than the inner diameter of the large diameter end of the variable diameter hole.

[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, an identification portion is formed on the outer surface of the rivet block. When it is assembled with the pole, the position of the identification portion can effectively determine whether the rivet block is assembled correctly, so that the large diameter end of the rivet block reducing hole is close to the top end in the axial direction of the pole, so as to facilitate the riveting of the pole, thereby ensuring the sealing and riveting strength of the connection between the pole and the rivet block, so as to improve the battery cell yield and battery cell safety performance.

[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 given 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 partial cross-sectional view of a battery cell cover in the prior art;

[0020] Figure 2 is a partial cross-sectional view of a cell cover according to an embodiment of the utility model;

[0021] Figure 3 It is a schematic diagram of a riveting block according to an embodiment of the utility model.

[0022] Icon: 1- rivet block; 10- reducing hole; 11- sink; 12- groove; 2- pole. 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 can 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 Figures 2 to 3 As shown, the cell cover plate in this embodiment includes a pole 2 and a plate assembly sleeved on the outer side of the pole 2, and an identification portion is formed on the outer surface of the riveted block 1. In addition, the riveted block 1 is also formed with a variable diameter hole 10 corresponding to the pole 2, so that the position of the identification portion can be used to efficiently determine whether the riveted block 1 is assembled correctly. 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 Figure 2As shown, the riveting block 1 is sleeved on the outer part of the pole 2 through the reducing hole 10, and the reducing hole 10 is formed as a through hole that penetrates the top and bottom of the riveting block 1, and when the riveting block 1 is connected to the pole 2, the large diameter end of the reducing hole 10 is close to the top of the pole 2 in the axial direction and penetrates the top of the riveting block 1, and correspondingly, the small diameter end of the reducing hole 10 penetrates the bottom of the riveting block 1; further, the inner diameter of the small diameter end of the reducing hole 10 is adapted to the outer diameter of the pole 2 (before riveting). In this way, the riveting of the pole 2 can be facilitated, and the sealing and riveting strength of the connection between the pole 2 and the riveting block 1 can be guaranteed, so as to improve the cell yield and cell safety performance.

[0034] In order to ensure that the riveting block 1 and the pole 2 can be assembled efficiently and accurately, the riveting block 1 in this embodiment is also provided with an identification portion. During assembly, the position of the identification portion can be used to quickly determine whether the riveting block 1 is correctly assembled. Specifically, in order to further improve the efficiency of assembly, the identification portion is provided on the end surface of the top of the riveting block 1 in this embodiment to facilitate identification by the staff, that is, when the staff sees the identification portion, it means that the assembly direction of the riveting block 1 is correct at this time.

[0035] More specifically, if Figure 3 As shown, the identification portion in this embodiment includes a groove 12, which is distributed at both ends of the above-mentioned diameter-reducing hole 10 along the length direction of the riveting block 1. The shape of the groove 12 is not specifically limited, for example, it can be formed as a columnar groove 12, or it can be formed as a rectangular parallelepiped groove 12. In addition, the number of the grooves 12 is not fixed. When there are multiple grooves 12, the multiple grooves 12 should be evenly distributed on the outer peripheral side of the diameter-reducing hole 10 to ensure the structural stability of the riveting block 1.

[0036] In addition, it should be noted that the riveting block 1 and the pole 2 in this embodiment are connected by riveting, that is, the riveting block 1 is first sleeved on the outer side of the pole 2 through the diameter-reducing hole 10, and then the pole 2 is riveted by the pressing device, and the riveted pole 2 can be adapted to the diameter-reducing hole 10 to ensure the riveting strength and sealing performance. The riveting of the pole 2 is a common technical means in the existing battery cover assembly, so the corresponding riveting equipment and riveting process are not described in detail.

[0037] like Figures 2 to 3 As shown, in this embodiment, a groove 11 is also formed at the top of the riveting block 1 to facilitate the riveting operation of the pressing equipment. The above-mentioned variable diameter hole 10 passes through the bottom of the groove 11, and the inner diameter of the groove 11 is larger than the inner diameter of the large diameter end of the variable diameter hole 10.

[0038] In addition, the cover plate assembly in this embodiment also includes a sealing ring, a plain aluminum plate, an upper insulating member, and a lower insulating member. The assembly of these components and the assembly between them and the pole 2 can adopt existing assembly processes.

[0039] According to the battery cell cover of the utility model, an identification portion is formed on the outer surface of the riveted block 1. When it is assembled with the pole 2, the position of the identification portion can effectively determine whether the riveted block 1 is assembled correctly, so that the large diameter end of the reducing hole 10 of the riveted block 1 is close to the top end in the axial direction of the pole 2, so as to facilitate the riveting of the pole 2, thereby ensuring the sealing and riveting strength of the connection between the pole 2 and the riveted block 1, so as to improve the battery cell yield and battery cell safety performance.

[0040] 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.

[0041] 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.

[0042] 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: poles; and A plate assembly is sleeved on the outer side of the pole; the plate assembly includes a rivet block; an identification portion is formed on the outer surface of the rivet block; the rivet block is also formed with a diameter-changing hole corresponding to the pole, and the large-diameter end of the diameter-changing hole is close to the top end of the pole axis direction.

2. The cell cover plate according to claim 1, characterized in that: The diameter-reducing hole is formed as a through hole penetrating the top end and the bottom end of the riveting block.

3. The cell cover plate according to claim 2, characterized in that: The large diameter end of the diameter-changing hole passes through the top end of the riveting block, and the small diameter end of the diameter-changing hole passes through the bottom end of the riveting block.

4. The cell cover plate according to claim 3, characterized in that: The identification portion is located at the end surface of the top end of the riveting block; the identification portion includes at least one groove.

5. The cell cover plate according to claim 4, characterized in that: When there are multiple grooves, the multiple grooves are evenly distributed on the outer peripheral side of the variable diameter hole.

6. The cell cover plate according to claim 5, characterized in that: The groove is formed as a columnar groove and / or a rectangular parallelepiped groove.

7. The cell cover plate according to claim 1, characterized in that: The riveting block is riveted to the pole, and after the pole is riveted, the pole is adapted to the reduced diameter hole.

8. The cell cover plate according to claim 7, characterized in that: A sink groove for riveting is also formed at the top of the riveting block, and the variable diameter hole runs through the bottom of the sink groove; the inner diameter of the sink groove is greater than the inner diameter of the large diameter end of the variable diameter hole.

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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