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. A plurality of protruding hot melting columns are arranged at the two ends of the lower plastic part in the length direction, through holes corresponding to the hot melting columns are formed in the insulating film, the insulating film can be arranged on the outer side portions of the hot melting columns in a sleeving mode through the through holes, and then the hot melting columns are heated so that the hot melting columns can be melted and deformed to fix the insulating film. Compared with a hot melting mode of heating the insulating film in the prior art, the hot melting column can be firstly heated based on the arrangement of the hot melting column, so that the conditions of tearing of the insulating film and the like can be avoided, and potential safety hazards are eliminated.

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 of square batteries are mostly fixed and connected by traditional hot-melt method. The principle of hot-melt is to melt the insulating film first, and then transfer the heat to the lower plastic part through the insulating film, so that the insulating film and the lower plastic part are melted and combined together. However, the hot-melt process is very prone to tearing at the hot-melt part of the insulating film, 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 hot-melt method of first melting the insulating film in the current battery cover is prone to tearing of the insulating film.

[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 respectively provided with protruding hot melt columns;

[0006] The insulating film is formed with a through hole corresponding to the hot melt column, and the insulating film is sleeved on the outer side of the hot melt column through the through hole; the hot melt column can be deformed by hot melting to fix the insulating film.

[0007] Preferably, at least two of the hot melt columns are respectively disposed on two end surfaces of the lower plastic part in the length direction.

[0008] Preferably, at one end surface of the lower plastic part in the length direction, a plurality of the hot melt columns are arranged at intervals along the width direction of the lower plastic part.

[0009] Preferably, along the axis direction of the hot melt column, the outer diameter of the first end of the hot melt column away from the lower plastic part is smaller than the outer diameter of the second end of the hot melt column close to the lower plastic part, so that the hot melt column is formed into a truncated cone-like structure.

[0010] Preferably, the thickness of the insulating film is T, and when the hot melt column is in an un-hot melt state, the height of the hot melt column in the axial direction is 4T-5T.

[0011] Preferably, after the hot melt column is hot-melted, the first end of the hot melt column extends in a direction away from the axis of the hot melt column, so that the first end of the hot melt column forms a limiting portion.

[0012] Preferably, a gap is formed between the limiting portion and the end surface of the lower plastic part, and the gap is adapted to correspond to the insulating film.

[0013] Preferably, after the hot melt column is hot-melted, the height of the hot melt column in the axial direction is 2T to 3T; along the radial direction of the hot melt column, the extension distance of the limit portion is 6T to 8T.

[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, battery and battery module of the utility model, multiple protruding hot melt columns are arranged at both ends of the length direction of the lower plastic part, and through holes corresponding to the hot melt columns are arranged at the insulating film, and the insulating film can be sleeved on the outer side of the hot melt column through the through hole, and then the hot melt column is heated to make the hot melt column melt and deform to fix the insulating film. Compared with the hot melt method of heating the insulating film in the prior art, the utility model can heat the hot melt column first based on the setting of the hot melt column, thereby avoiding the situation of tearing of the insulating film and eliminating safety hazards.

[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 It is a schematic diagram of the assembly of the lower plastic part and the insulating film before being hot-melted according to an embodiment of the utility model;

[0021] Figure 3 It is a schematic diagram of the assembly of the lower plastic part and the insulating film after hot melting according to an embodiment of the utility model.

[0022] Icon: 1-lower plastic part; 10-hot melt column; 11-limiting 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 a plurality of protruding hot melt columns 10 at both ends in the length direction, and the insulating film 2 is formed with through holes corresponding to the hot melt columns 10. The insulating film 2 can be sleeved on the outer side of the hot melt columns 10 through the through holes, and then the hot melt columns 10 are heated to melt and deform the hot melt columns 10 to fix the insulating film 2. In this embodiment, the hot melt method of first heating the hot melt column 10 can avoid the insulating film 2 from tearing, etc., eliminating safety hazards. 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 1As shown, two end surfaces of the lower plastic part 1 in the length direction are respectively provided with two hot melt columns 10, and the two hot melt columns 10 are spaced apart along the width direction of the lower plastic part 1. However, the number, spacing and setting positions of the hot melt columns 10 are not specifically limited, as long as they can facilitate the sleeve installation of the insulating film 2 and can stably connect the insulating film 2.

[0034] Specifically, Figure 2 As shown, when the hot melt column 10 is not hot-melted, it forms a quasi-truncated cone-shaped structure, that is, along the axial direction of the hot melt column 10, the outer diameter of the first end of the hot melt column 10 away from the lower plastic part 1 is smaller than the outer diameter of the second end close to the lower plastic part 1, so that the outer side thereof forms an inclined surface, which is convenient for the sleeve of the insulating film 2. Further, the thickness of the insulating film 2 is set to T, and the height of the hot melt column 10 in the axial direction is 4T to 5T, so that the hot melting effect of the hot melt column 10 can be guaranteed, so as to improve the stability of the connection between the insulating film 2 and the hot melt column 10.

[0035] Furthermore, when the insulating film 2 is sleeved on the outer side of the hot melt column 10 through the through hole, the hot melt column 10 is subjected to hot melting treatment. Figure 3 As shown, the first end of the hot melt column 10 in the axial direction extends toward the direction of its axis, so that the first end of the hot melt column 10 forms a limiting portion 11. A gap is formed between the limiting portion 11 and the end surface of the lower plastic part 1, and the gap is adapted to the insulating film 2, that is, the limiting portion 11 fixes the insulating film 2 between the hot melt column 10 and the lower plastic part 1. In order to improve the connection strength of the insulating film 2, after the hot melt column 10 is hot-melted, the height of the hot melt column 10 in the axial direction is 2T to 3T; along the radial direction of the hot melt column 10, the extension distance of the limiting portion 11 is 6T to 8T.

[0036] According to the battery cover of the utility model, a plurality of protruding hot melt columns 10 are arranged at both ends of the length direction of the lower plastic part 1, and through holes corresponding to the hot melt columns 10 are arranged at the insulating film 2, and the insulating film 2 can be sleeved on the outer side of the hot melt columns 10 through the through holes, and then the hot melt columns 10 are heated to melt and deform the hot melt columns 10 to fix the insulating film 2. Compared with the hot melt method of heating the insulating film 2 in the prior art, the utility model can heat the hot melt columns 10 first based on the arrangement of the hot melt columns 10, thereby avoiding the situation of tearing of the insulating film 2 and eliminating safety hazards.

[0037] 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.

[0038] 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.

[0039] 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 respectively provided with protruding hot melt columns; The insulating film is formed with a through hole corresponding to the hot melt column, and the insulating film is sleeved on the outer side of the hot melt column through the through hole; the hot melt column can be deformed by hot melting to fix the insulating film.

2. The cell cover plate according to claim 1, characterized in that: At least two of the hot melt columns are respectively arranged on the two end surfaces in the length direction of the lower plastic part.

3. The cell cover plate according to claim 2, characterized in that: At an end surface of the lower plastic part in the length direction, a plurality of the hot melt columns 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: Along the axis direction of the hot melt column, the outer diameter of the first end of the hot melt column away from the lower plastic part is smaller than the outer diameter of the second end of the hot melt column close to the lower plastic part, so that the hot melt column is formed into a truncated cone-like structure.

5. The cell cover plate according to claim 4, characterized in that: The thickness of the insulating film is T. When the hot melt column is in an un-hot melt state, the height of the hot melt column in the axial direction is 4T to 5T.

6. The cell cover plate according to claim 4, characterized in that: After the hot melt column is hot-melted, the first end of the hot melt column extends in a direction away from the axis of the hot melt column, so that the first end of the hot melt column forms a limiting portion.

7. The cell cover plate according to claim 6, characterized in that: A gap is formed between the limiting portion and the end surface of the lower plastic part, and the gap is correspondingly matched with the insulating film.

8. The cell cover plate according to claim 6, characterized in that: After the hot melt column is hot-melted, the height of the hot melt column in the axial direction is 2T to 3T; along the radial direction of the hot melt column, the extension distance of the limit portion is 6T to 8T.

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.

Images