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 riveting block which is fixedly connected with the plate body assembly, and an assembly hole is formed in the riveting block; and the pole column is provided with a column body part and a plate body part, the column body part is correspondingly positioned in the assembly hole and is welded with the riveting block, and the plate body part is used for being connected with a pole group. When the battery cover plate is assembled with the battery, the tabs of the pole group can be directly welded with the plate body part. Namely, the pole in the battery cover plate can simultaneously realize the functions of a'pole 'and a'connecting piece' in the prior art, so that the number of parts and welding procedures are effectively reduced, the production efficiency is improved, and the cost is saved; besides, the internal space of the battery can be saved by the battery cover plate, and the battery assembled with the battery cover plate can provide greater energy for the battery with the same volume, so that the competitiveness of the product is effectively improved.

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 square lithium batteries, the poles at the cover plate and the pole ears at the pole group are usually electrically connected through connecting sheets, which increases the welding process in the battery assembly process, that is, increases the difficulty of the battery production and assembly process. 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 poles and tabs in the existing batteries are connected by connecting sheets, resulting in more welding steps during the battery assembly process.

[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;

[0006] A riveting block, fixedly connected to the plate assembly, the riveting block being formed with an assembly hole; and

[0007] The pole is formed with a column part and a plate part, wherein the column part is correspondingly located in the assembly hole and welded to the riveting block, and the plate part is used to be connected to the pole group.

[0008] Preferably, along the axial direction of the pole, the pole is sequentially formed with the column portion and the plate portion; when the column portion is correspondingly connected to the assembly hole, the plate portion abuts against the bottom of the riveting block.

[0009] Preferably, the column portion is formed into a cylindrical structure, and the plate portion is formed into a disc-like structure; the diameter of the column portion is smaller than the diameter of the plate portion.

[0010] Preferably, a guide portion is formed at the bottom end of the assembly hole in the axial direction, and a transition portion corresponding to the guide portion is formed at the top end of the column portion away from the plate portion;

[0011] The guide portion is formed into an arc-shaped structure arched toward the axis of the assembly hole; and the transition portion is formed into an arc-shaped structure arched toward the axis away from the column portion.

[0012] Preferably, the riveting block is formed as a columnar structure, and along the axial direction of the riveting block, the riveting block is sequentially formed with a first limiting portion, a main body and a second limiting portion; the assembly hole passes through the first limiting portion and the second limiting portion.

[0013] Preferably, the diameters of the first limiting portion and the second limiting portion are both larger than the diameter of the main body, and the plate assembly is located between the first limiting portion and the second limiting portion.

[0014] Preferably, when the column portion is correspondingly connected to the assembly hole, the plate portion abuts against a bottom portion of the second limiting portion away from the first limiting portion.

[0015] Preferably, the outer side wall of the top end of the column portion away from the plate portion is correspondingly welded to the inner wall of the assembly hole.

[0016] According to a second aspect of the utility model, a battery is provided, wherein the battery comprises the battery cover plate as described above.

[0017] 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.

[0018] According to the battery cover, battery and battery pack of the utility model, the battery cover is provided with a plate assembly and a rivet block, and the rivet block is formed with an assembly hole, so that the column part of the pole can be assembled and welded corresponding to the assembly hole to achieve a stable connection between the pole and the plate assembly; further, the pole is also formed with a plate part, and when the battery cover is assembled with the battery, the pole ear of the pole group can be directly welded to the plate part. That is, the pole in the battery cover itself can simultaneously realize the functions of the "pole" and "connecting plate" in the prior art, thereby effectively reducing the number of parts and welding procedures, improving production efficiency, and saving costs; in addition, the battery cover can also save the internal space of the battery. For batteries of equal volume, the battery equipped with the battery cover can provide greater energy, effectively improving the competitiveness of the product.

[0019] 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

[0020] 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.

[0021] Figure 1 is a partial cross-sectional view of a battery cover according to an embodiment of the utility model;

[0022] Figure 2 It is a cross-sectional view of a pole according to an embodiment of the utility model.

[0023] Icon: 1-plate assembly; 2-riveting block; 20-main body; 21-first limiting portion; 22-second limiting portion; 23-assembly hole; 24-guide portion; 3-pole; 30-column portion; 31-plate portion. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] 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.

[0027] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] According to a first aspect of the utility model, a battery cover is provided, such as Figure 1 to Figure 2As shown, the battery cover in this embodiment includes a plate assembly 1, a riveting block 2 and a pole 3, wherein the riveting block 2 is fixedly connected to the plate assembly 1 and is formed with an assembly hole 23, and the pole 3 is correspondingly connected to the riveting block 2 (i.e., the plate assembly 1) through the assembly hole 23. 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.

[0034] It should be noted that the plate assembly 1 in this embodiment includes components such as a cover plate, an upper plastic and a sealing ring, and the rivet block 2 is assembled and fixed correspondingly to the plate assembly 1. Each component in the plate assembly 1 is a conventional component provided in the existing battery cover plate; in addition, the connection method between the rivet block 2 and the plate assembly 1 also belongs to the existing technology, so it will not be repeated.

[0035] like Figure 1 As shown, the riveting block 2 in this embodiment is formed into a columnar structure, and along the axial direction of the riveting block 2, it is sequentially formed with a first limiting portion 21, a main body 20 and a second limiting portion 22; the riveting block 2 is also formed with an assembly hole 23 for connecting the pole 3, and the assembly hole 23 passes through the first limiting portion 21 and the second limiting portion 22 along the axial direction of the riveting block 2. Specifically, the diameters of the first limiting portion 21 and the second limiting portion 22 are both larger than the diameters of the main body 20, so that when the riveting block 2 is assembled with the plate assembly 1, the plate assembly 1 is located between the first limiting portion 21 and the second limiting portion 22, and the plate assembly 1 and the riveting block 2 are stably connected. It should be noted that there is no specific restriction on the size of the first limiting portion 21, the main body 20 and the second limiting portion 22, and it should be determined comprehensively according to the actual situation, such as the size of the plate assembly 1.

[0036] Furthermore, if Figure 1 As shown, a guide portion 24 is formed at the bottom end of the assembly hole 23 in the axial direction (in a battery provided with the present battery cover, the bottom end of the assembly hole 23 in the axial direction is the end thereof close to the pole group), and the guide portion 24 is formed as an arc-shaped structure arched toward the axis of the assembly hole 23 to facilitate the introduction of the pole 3 during assembly. There is no limitation on the specific shape of the guide portion 24, such as its curvature, as long as it is convenient to achieve the technical effect.

[0037] In this embodiment, if Figure 2As shown, along the axial direction of the pole 3, the pole 3 is sequentially formed with a column portion 30 and a plate portion 31, the column portion 30 is used to be assembled corresponding to the above-mentioned assembly hole 23, and the plate portion 31 is used to be connected to the pole lug at the pole group (that is, the pole lug is directly welded to the plate portion 31). Specifically, the column portion 30 is formed into a cylindrical structure, the plate portion 31 is formed into a disc-like structure, and the diameter of the column portion 30 is smaller than the diameter of the plate portion 31, that is, when the column portion 30 is connected correspondingly to the assembly hole 23, the plate portion 31 can abut against the bottom of the second limiting portion 22 away from the first limiting portion 21, so as to improve the accuracy of the assembly of the pole 3 and the riveting block 2, and at the same time, it can also facilitate the connection between the pole 3 and the pole lug.

[0038] More specifically, a transition portion corresponding to the guide portion 24 is formed at the top of the column portion 30 of the pole 3 away from the plate portion 31, and the transition portion is formed as an arc-shaped structure arched toward the axis away from the column portion 30, that is, in this embodiment, a chamfer is formed at the top edge of the column portion 30, thereby further increasing the convenience of assembling the pole 3.

[0039] In this embodiment, after the column portion 30 of the pole 3 is assembled in the assembly hole 23 of the riveting block 2, the outer wall at the top of the column portion 30 is welded to the inner wall of the assembly hole 23 to achieve technical effects such as electrical connection and sealing of the battery cover.

[0040] According to the battery cover of the utility model, the battery cover is provided with a plate assembly 1 and a riveting block 2, and the riveting block 2 is formed with an assembly hole 23, so that the column part 30 of the pole 3 can be assembled and welded corresponding to the assembly hole 23 to achieve a stable connection between the pole 3 and the plate assembly 1; further, the pole 3 is also formed with a plate part 31, and when the battery cover is assembled with the battery, the pole ear of the pole group can be directly welded with the plate part 31. That is, the pole 3 in the battery cover itself can simultaneously realize the functions of the "pole 3" and "connecting piece" in the prior art, thereby effectively reducing the number of parts and welding procedures, improving production efficiency, and saving costs; in addition, the battery cover can also save the internal space of the battery. For batteries of equal volume, the battery equipped with the battery cover can provide greater energy, effectively improving the competitiveness of the product.

[0041] According to a second aspect of the utility model, a battery is provided. The battery comprises the battery cover plate as described above, and the pole lugs at the battery pole group are directly welded to the plate body 31 of the pole 3 .

[0042] 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.

[0043] 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; A riveting block, fixedly connected to the plate assembly, the riveting block being formed with an assembly hole; and The pole is formed with a column part and a plate part, wherein the column part is correspondingly located in the assembly hole and welded to the riveting block, and the plate part is used to be connected to the pole group.

2. The battery cover according to claim 1, characterized in that: Along the axial direction of the pole, the pole is sequentially formed with the column part and the plate part; when the column part is correspondingly connected with the assembly hole, the plate part abuts against the bottom of the riveting block.

3. The battery cover according to claim 1, characterized in that: The column part is formed into a cylindrical structure, and the plate part is formed into a disc-like structure; the diameter of the column part is smaller than the diameter of the plate part.

4. The battery cover according to claim 1, characterized in that: A guide portion is formed at the bottom end of the assembly hole in the axial direction, and a transition portion corresponding to the guide portion is formed at the top end of the column portion away from the plate portion; The guide portion is formed into an arc-shaped structure arched toward the axis of the assembly hole; and the transition portion is formed into an arc-shaped structure arched toward the axis away from the column portion.

5. The battery cover according to claim 1, characterized in that: The riveting block is formed into a columnar structure. Along the axial direction of the riveting block, the riveting block is sequentially formed with a first limiting portion, a main body and a second limiting portion; the assembly hole passes through the first limiting portion and the second limiting portion.

6. The battery cover according to claim 5, characterized in that: The diameters of the first limiting portion and the second limiting portion are both larger than the diameter of the main body, and the plate assembly is located between the first limiting portion and the second limiting portion.

7. The battery cover according to claim 6, characterized in that: When the column portion is connected to the assembly hole correspondingly, the plate portion abuts against the bottom of the second limiting portion away from the first limiting portion.

8. The battery cover according to claim 1, characterized in that: The outer side wall of the top end of the column part away from the plate part is correspondingly welded to the inner wall of the assembly hole.

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

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

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