Battery cover plate, battery and battery pack

Abstract

The utility model provides a battery cover plate, a battery and a battery pack, and relates to the field of battery structures. The battery cover plate comprises a plate body assembly and a pole which is correspondingly connected with the plate body assembly, and a plurality of grooves are formed in the side wall of the pole to form a heat dissipation part. A plurality of grooves are formed in the side wall of the pole to form a heat dissipation part; therefore, the contact area between the pole and the plate body assembly (the lower plastic and the sealing element in the plate body assembly) can be reduced through the heat dissipation part, and meanwhile, the heat dissipation area can be increased. Thus, in the welding process of the pole and the plate body assembly, protective gas can be blown to the corresponding positions of the pole and the plate body assembly, under the combined action of the protective gas and the groove of the heat dissipation part, lower plastic and a sealing piece can be effectively prevented from being melted, and the structural strength and the overflowing capacity of the pole can be guaranteed through structural limitation of the groove; therefore, the use performance and the safety performance of the battery are ensured.

Description

Technical Field

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

[0002] In existing lithium batteries, the battery cover is the core component to ensure the safety and sealing of lithium batteries, and its performance stability is crucial to lithium batteries. In existing battery covers, the poles are usually connected to the plate assembly by welding, but the lower plastic and the sealing ring in the plate assembly are generally made of plastic, which has poor heat resistance. Therefore, the lower plastic and / or the sealing part often melt during the welding process of the pole, which affects the production quality and efficiency, and also increases the overall production cost. Utility Model Content

[0003] In view of this, the purpose of the present application is to provide a battery cover, a battery and a battery pack to solve the problem that the lower plastic and / or the seal in the existing battery is very easy to melt during the welding process of the pole.

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

[0005] Plate assembly, and

[0006] The pole is connected to the plate assembly correspondingly, and a plurality of grooves are arranged on the side wall of the pole to form a heat dissipation portion.

[0007] Preferably, the pole is formed with an assembly portion and a limiting portion connected in sequence, the assembly portion is formed into a columnar structure; along a direction perpendicular to the connection direction of the assembly portion and the limiting portion, the length of the limiting portion is greater than the outer diameter of the assembly portion.

[0008] Preferably, the plate assembly is formed with an assembly hole corresponding to the assembly portion; when the pole is correspondingly connected to the plate assembly, the assembly portion is inserted into the assembly hole, and the limiting portion abuts against the bottom of the plate assembly.

[0009] Preferably, the heat dissipation portion is formed on an outer side wall of the mounting portion.

[0010] Preferably, the depth of the groove is L, 0.1 mm<L<1 mm.

[0011] Preferably, the outer diameter of the assembly portion is D, and L / D>0.033.

[0012] Preferably, the plurality of grooves are arranged obliquely and staggered so that the heat dissipation portion is formed into a knurled structure.

[0013] Preferably, among the plurality of grooves extending in the same direction, the distance between any two adjacent grooves is greater than 0.5 mm.

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

[0015] According to a third aspect of the present invention, a battery pack is provided, wherein the battery pack is provided with the battery as described above.

[0016] According to the battery cover, battery and battery pack of the utility model, a plurality of grooves are provided on the side wall of the pole to form a heat dissipation portion; thus, the contact area between the pole and the plate assembly (the lower plastic and the seal therein) can be reduced through the heat dissipation portion, and the heat dissipation area can be increased. In this way, during the welding process of the pole and the plate assembly, a protective gas will be blown to the corresponding positions of the pole and the plate assembly, and under the combined effect of the protective gas and the heat dissipation portion, the melting of the lower plastic and the seal can be effectively avoided.

[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 an exploded view of a battery cover according to an embodiment of the utility model;

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

[0021] Figure 3 It is a cross-sectional view of a pole according to an embodiment of the utility model.

[0022] Icons: 10- rivet block; 11- upper plastic; 12- plain aluminum plate; 13- sealing ring; 14- lower plastic; 15- sub-assembly hole; 2- pole; 20- assembly part; 21- heat dissipation part; 22- limit part. 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 a first aspect of the utility model, a battery cover is provided, such as Figures 1 to 3 As shown, the battery cover in this embodiment includes a plate assembly and a pole 2 connected to the plate assembly, and a heat dissipation portion 21 is formed at the side wall of the pole 2, and the heat dissipation portion 21 is specifically formed as a plurality of grooves. The heat dissipation portion 21 can effectively increase the heat dissipation area, and at the same time can also reduce the contact area between the pole 2 and the plate assembly, thereby effectively realizing the heat dissipation during the welding process of the pole 2, so as to avoid the melting of the lower plastic 14 and the seal with poor heat resistance in the plate assembly. In the following, the specific structure of the above-mentioned parts of the battery cover according to the utility model will be described in detail.

[0033] In this embodiment, if Figure 2As shown, the pole 2 is formed with an assembly portion 20 and a limiting portion 22 connected in sequence, and the assembly portion 20 is formed into a columnar structure, and its axis is formed as the axis of the pole 2. Further, the limiting portion 22 is formed into a rectangular plate-like structure, and along the direction perpendicular to the connection direction of the assembly portion 20 and the limiting portion 22, the length of the limiting portion 22 is greater than the outer diameter of the assembly portion 20, so as to achieve the limiting effect of the limiting portion 22, thereby improving the accuracy of the assembly of the pole 2. Furthermore, the assembly portion 20 in this embodiment is located at the top center of the limiting portion 22, that is, the width of the limiting portion 22 is greater than the diameter of the assembly portion 20, and the height of the limiting portion 22 in the axial direction is less than the height of the limiting portion 22 in the axial direction. It should be noted that there is no specific restriction on the specific size of the pole 2, and it should be determined comprehensively according to actual conditions, such as the specifications of the battery.

[0034] In addition, if Figure 1 As shown, the plate assembly is formed with an assembly hole corresponding to the assembly portion 20 of the pole 2, so that when the pole 2 is connected to the plate assembly, the assembly portion 20 can be inserted into the assembly hole, and the stop portion 22 abuts against the bottom of the plate assembly. Specifically, the plate assembly in this embodiment includes a riveting block 10, an upper plastic 11, a plain aluminum plate 12, a sealing ring 13 and a lower plastic 14, and the above components are respectively formed with a sub-assembly hole 15 corresponding to the assembly portion 20 of the pole 2, that is, when the pole 2 is connected to the plate assembly, the stop portion 22 actually abuts against the bottom of the lower plastic 14.

[0035] Based on the above structure, the heat dissipation portion 21 in this embodiment is substantially formed on the outer wall of the assembly portion 20 (eg Figures 2 to 3 As shown, further, the plurality of grooves in this embodiment are arranged obliquely and staggered, so that the heat dissipation portion 21 is formed into a knurled structure, which can be mass-processed by CNC machine tools and other equipment, and the processing technology is relatively simple. However, the specific structure of the heat dissipation portion 21 is not limited thereto, for example, the heat dissipation portion 21 can also be formed into a grid-like or twill-like structure, as long as it can facilitate the technical effect of heat dissipation.

[0036] Furthermore, the depth of each groove in the heat dissipation portion 21 is set to L, and the outer diameter of the assembly portion 20 is set to D. In order not to affect the structural strength and current carrying capacity of the pole 2, preferably, 0.1mm<L<1mm and L / D>0.033. In addition, among the plurality of grooves extending in the same direction (i.e., the plurality of grooves parallel to each other), the spacing between any two adjacent grooves is greater than 0.5mm, where the spacing refers to the distance between the adjacent sides of the two adjacent grooves, so as to avoid the side wall of the pole 2 from producing burrs and other defects that affect the performance of the pole 2.

[0037] According to the battery cover of the utility model, a plurality of grooves are provided on the side wall of the pole 2 to form a heat dissipation portion 21; thus, the contact area between the pole 2 and the plate assembly (the lower plastic 14 and the seal therein) can be reduced through the heat dissipation portion 21, and the heat dissipation area can be increased. In this way, during the welding process of the pole 2 and the plate assembly, a protective gas will be blown to the corresponding positions of the pole 2 and the plate assembly, and under the combined effect of the protective gas and the grooves of the heat dissipation portion 21, the melting of the lower plastic 14 and the seal can be effectively avoided, and the structural limitation of the grooves can ensure the structural strength and flow capacity of the pole 2, thereby ensuring the use performance and safety performance of the battery.

[0038] According to a second aspect of the utility model, a battery is provided, the battery comprising the battery cover as described above.

[0039] According to a third aspect of the present invention, a battery pack is provided, wherein the battery pack is provided with the battery as described above.

[0040] 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 cover, characterized in that: The battery cover comprises: Plate assembly, and The pole is connected to the plate assembly correspondingly, and a plurality of grooves are arranged on the side wall of the pole to form a heat dissipation portion; the pole is formed with an assembly portion and a limiting portion connected in sequence, the assembly portion is formed as a columnar structure, and the heat dissipation portion is formed on the outer side wall of the assembly portion, and the plurality of grooves are arranged obliquely and staggered so that the heat dissipation portion forms a knurled structure.

2. The battery cover according to claim 1, characterized in that: Along a direction perpendicular to a connection direction between the assembly portion and the limiting portion, a length of the limiting portion is greater than an outer diameter of the assembly portion.

3. The battery cover according to claim 2, characterized in that: The plate assembly is formed with an assembly hole corresponding to the assembly portion; when the pole is correspondingly connected to the plate assembly, the assembly portion is inserted into the assembly hole, and the limiting portion abuts against the bottom of the plate assembly.

4. The battery cover according to claim 2, characterized in that: The depth of the groove is L, 0.1 mm<L<1 mm.

5. The battery cover according to claim 4, characterized in that: The outer diameter of the assembly portion is D, L / D>0.

033.

6. The battery cover according to claim 1, characterized in that: Among the plurality of grooves extending in the same direction, the distance between any two adjacent grooves is greater than 0.5 mm.

7. A battery, characterized in that: The battery comprises the battery cover according to any one of claims 1 to 6.

8. A battery pack, characterized in that: The battery pack is provided with the battery as claimed in claim 7.

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