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 connecting parts are arranged at the two ends of the lower plastic part in the length direction, and the through holes corresponding to the connecting parts are formed in the insulating film, so that the insulating film can be correspondingly clamped with the connecting parts through the through holes, and the connecting strength of the insulating film and the lower plastic part can be improved while the assembly process is simplified.

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 insulating film and the lower plastic part in the square battery are usually fixed and connected by hot melting. However, the hot melting process is complicated and the connection strength is low. In addition, the hot melting point is prone to tearing, which poses a great safety hazard. 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 process of connecting the insulating film and the lower plastic part by hot melting in the current battery cover is complicated and the connection strength is low.

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

[0005] A lower plastic part, wherein both ends of the lower plastic part in the length direction are provided with connecting parts;

[0006] The insulating film is formed with a through hole corresponding to the connecting portion, and the insulating film is correspondingly engaged with the connecting portion through the through hole.

[0007] Preferably, two end surfaces of the lower plastic part are respectively provided with a plurality of the connecting parts.

[0008] Preferably, at each end surface of the lower plastic part, a plurality of the connecting portions are arranged at intervals along the width direction of the lower plastic part.

[0009] Preferably, the connecting portion comprises a recessed portion formed on an end surface of the lower plastic part in the length direction, and the recessed portion passes through the top surface of the lower plastic part.

[0010] Preferably, the bottom surface of the recessed portion is formed as an inclined surface, and the depth of the recessed portion close to the top surface of the lower plastic part is greater than the depth of the recessed portion close to the bottom surface of the lower plastic part.

[0011] Preferably, the connecting portion further comprises a buckle arranged on an end surface of the lower plastic part in the length direction.

[0012] Preferably, the buckle is formed as a plate-like structure and the buckle protrudes from the end surface of the lower plastic part.

[0013] Preferably, along the height direction of the lower plastic part, the first part of the buckle extends to the opening of the recessed portion; and a vacant portion is formed on the inner side of the first part facing the recessed portion for engaging with the insulating film.

[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 cell cover plate, battery cell and battery cell module of the utility model, connecting parts are arranged at both ends of the lower plastic part in the length direction, and through holes corresponding to the connecting parts are arranged at the insulating film, so that the insulating film can be correspondingly engaged with the connecting parts through the through holes, thereby simplifying the assembly process while improving the connection strength between the insulating film and the lower plastic part.

[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 is a schematic diagram of a lower plastic part according to an embodiment of the utility model;

[0020] Figure 2 is an enlarged schematic diagram of point A according to an embodiment of the utility model;

[0021] Figure 3 It is a partial assembly cross-sectional view of the lower plastic part and the insulating film according to an embodiment of the utility model.

[0022] Icons: 1-lower plastic part; 10-connecting part; 100-recessed part; 101-buckle; 102-first part; 103-vacant part; 104-second part; 2-insulating film. 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 Figures 1 to 3 As shown, the cell cover plate in this embodiment includes a lower plastic part 1 and an insulating film 2. The lower plastic part 1 is provided with connecting parts 10 at both ends in the length direction, and the insulating film 2 is formed with through holes corresponding to the connecting parts 10. The insulating film 2 can be connected with the connecting parts 10 through the through holes, that is, the insulating film 2 and the lower plastic part 1 in this embodiment are connected by a buckle 101, which can simplify the assembly process while ensuring the connection strength between the two. 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 1 to Figure 2As shown, two end faces in the length direction of the lower plastic part 1 are respectively provided with two connecting parts 10, and at each end face of the lower plastic part 1, the two connecting parts 10 are spaced apart along the width direction of the lower plastic part 1 to improve the stability of the connection of the insulating film 2. However, there is no specific limitation on the number, location and spacing of the connecting parts 10, as long as they can facilitate the stable clamping of the insulating film 2.

[0034] Specifically, Figures 2 to 3 As shown, in order to facilitate the assembly of the insulating film 2, the connecting portion 10 includes a recessed portion 100 formed on the end surface of the lower plastic part 1 in the length direction, and the recessed portion 100 penetrates the top surface of the lower plastic part 1. Further, the bottom surface of the recessed portion 100 is formed as an inclined surface, and the depth of the recessed portion 100 near the top surface of the lower plastic part 1 is greater than the depth near the bottom surface of the lower plastic part 1, which can further improve the smoothness of the assembly of the insulating film 2. However, there is no specific limitation on the recessed depth, shape and size of the recessed portion 100, as long as the above technical effects can be achieved.

[0035] More specifically, the connecting portion 10 further includes a buckle 101 disposed on the end surface of the lower plastic part 1 in the length direction. Figure 2 As shown, the buckle 101 is formed into a plate-like structure and protrudes from the end surface of the lower plastic part 1. Along the height direction of the lower plastic part 1, the buckle 101 is formed with a first part 102 and a second part 104 connected in sequence, wherein the first part 102 extends to the opening of the recessed part 100, and a vacant part 103 is formed on the inner side of the first part 102 facing the recessed part 100 for corresponding engagement with the insulating film 2; and the second part 104 is in contact with the end surface of the lower plastic part 1.

[0036] It should be noted that the size of the vacant portion 103 is not specifically limited and should be determined based on actual conditions such as the thickness of the insulating film 2. The vacant portion 103 can fix the insulating film 2 between the buckle 101 and the end surface of the lower plastic part 1, and can effectively prevent the insulating film 2 from falling out.

[0037] Preferably, in order to ensure the assembly effect of the insulating film 2 , along the width direction of the lower plastic part 1 , the length of the recessed portion 100 is greater than the length of the first portion 102 of the buckle 101 .

[0038] According to the battery cell cover of the utility model, connecting parts 10 are provided at both ends of the lower plastic part 1 in the length direction, and through holes corresponding to the connecting parts 10 are provided at the insulating film 2, so that the insulating film 2 can be correspondingly engaged with the connecting parts 10 through the through holes, thereby simplifying the assembly process while improving the connection strength between the insulating film 2 and the lower plastic part 1.

[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: A lower plastic part, wherein both ends of the lower plastic part in the length direction are provided with connecting parts; The insulating film is formed with a through hole corresponding to the connecting portion, and the insulating film is correspondingly engaged with the connecting portion through the through hole.

2. The cell cover plate according to claim 1, characterized in that: The two end surfaces of the lower plastic part are respectively provided with a plurality of the connecting parts.

3. The cell cover plate according to claim 2, characterized in that: At each end surface of the lower plastic part, a plurality of the connecting parts are arranged at intervals along the width direction of the lower plastic part.

4. The cell cover plate according to claim 1, characterized in that: The connecting portion includes a recessed portion formed on an end surface of the lower plastic part in a length direction, and the recessed portion penetrates a top surface of the lower plastic part.

5. The cell cover plate according to claim 4, characterized in that: The bottom surface of the recessed portion is formed as an inclined surface, and the depth of the recessed portion near the top surface of the lower plastic part is greater than the depth of the recessed portion near the bottom surface of the lower plastic part.

6. The cell cover plate according to claim 4, characterized in that: The connecting portion further comprises a buckle arranged on an end surface of the lower plastic part in the length direction.

7. The cell cover plate according to claim 6, characterized in that: The buckle is formed into a plate-shaped structure and protrudes from the end surface of the lower plastic part.

8. The cell cover plate according to claim 7, characterized in that: Along the height direction of the lower plastic part, the first part of the buckle extends to the opening of the recessed portion; a vacant portion is formed on the inner side of the first part facing the recessed portion for clamping with the insulating film.

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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