CN220585342U

CN220585342U - Secondary battery brazing structure, top cover assembly and secondary battery

Info

Publication number: CN220585342U
Application number: CN202322026198.8U
Authority: CN
Inventors: 王雷; 方仁杰; 宋义根; 邓平华; 王世杰
Original assignee: Jiangxi Baisili New Energy Technology Co ltd
Current assignee: Jiangxi Baisili New Energy Technology Co ltd
Priority date: 2023-07-31
Filing date: 2023-07-31
Publication date: 2024-03-12
Anticipated expiration: 2033-07-31

Abstract

The utility model discloses a secondary battery brazing structure, a top cover assembly and a secondary battery, wherein the secondary battery brazing structure comprises a substrate; the novel welding device comprises a base plate, and is characterized by further comprising a buckle cover, wherein at least one mounting hole is formed in the base plate, a welding groove is formed in the base plate in a surrounding mode, brazing materials are filled in the welding groove, and the buckle cover is connected with the welding groove through brazing. The buckling cover and the base plate are connected through brazing, so that the combination interface of the buckling cover and the base plate can bear great tensile force, laser welding is avoided, and the problem that an upper cover structure is difficult to realize in an integrated structure can be solved by using a split structure.

Description

Secondary battery brazing structure, top cover assembly and secondary battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a secondary battery brazing structure, a top cover assembly and a secondary battery.

Background

In modern society, more and more electric tools and new energy vehicles are driven by power sources, and batteries are widely used in the electric tools and the new energy vehicles due to their excellent characteristics such as high capacity and high safety. These batteries should have good safety in addition to high capacity to meet the standards of use and to meet the needs of people.

In order to provide a mounting space for the electrode post, the aluminum ring of the top cover or the independent electrode post of the conventional secondary battery needs to be additionally provided with a fastener (buckle cover), but the structure is difficult to realize in the top cover or the independent electrode post of the integrated structure.

Disclosure of Invention

The utility model aims to solve the problems that: the utility model provides a secondary cell brazing structure, top cap subassembly and secondary cell, buckle closure and base plate are connected through brazing for the joint interface of buckle closure and base plate can bear very big pulling force, accomplishes and exempts from laser welding, can realize solving the difficult problem of realizing in integral type structure of upper cover structure with split type structure.

The technical scheme provided by the utility model for solving the problems is as follows: a secondary battery brazing structure includes a substrate; the novel welding device comprises a base plate, and is characterized by further comprising a buckle cover, wherein at least one mounting hole is formed in the base plate, a welding groove is formed in the base plate in a surrounding mode, brazing materials are filled in the welding groove, and the buckle cover is connected with the welding groove through brazing.

Preferably, the buckle cover comprises a buckle ring and an annular convex edge arranged at the upper end of the buckle ring, and the buckle ring is matched with the welding groove in shape.

Preferably, the retaining ring is in clearance fit with the welding groove.

Preferably, the welding groove is rectangular or circular.

Preferably, a reinforcing structure for increasing the contact area is arranged in the welding groove.

Preferably, the reinforcing structure is small pits, and the small pits are wavy or zigzag.

Preferably, the brazing material is in a paste form or a solid sheet form, and is directly filled in the welding groove.

Preferably, the substrate is a light aluminum sheet or an aluminum ring.

The utility model also discloses a top cover assembly, which comprises the secondary battery brazing structure.

The utility model also discloses a secondary battery comprising the top cover assembly.

Compared with the prior art, the utility model has the advantages that: the buckling cover and the base plate are connected through brazing, so that the combination interface of the buckling cover and the base plate can bear great tensile force, laser welding is avoided, and the problem that an upper cover structure is difficult to realize in an integrated structure can be solved by using a split structure.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model.

Fig. 1 is a schematic perspective view of embodiment 1 of the present utility model;

FIG. 2 is a schematic diagram of an explosive structure according to embodiment 1 of the present utility model;

FIG. 3 is a top view of embodiment 1 of the present utility model;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

fig. 5 is a schematic perspective view of embodiment 2 of the present utility model;

FIG. 6 is a top view of embodiment 2 of the present utility model;

fig. 7 is a B-B sectional view in fig. 6.

The drawings are marked: 1. the welding device comprises an annular convex edge, 2, a retaining ring, 3, a substrate, 4, brazing materials, 5, a welding groove, 6 and a mounting hole.

Detailed Description

The following detailed description of embodiments of the present utility model will be given with reference to the accompanying drawings and examples, by which the implementation process of how the present utility model can be applied to solve the technical problems and achieve the technical effects can be fully understood and implemented.

In the description of the present utility model, it should be noted that, for the azimuth words such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present utility model and simplifying the description, and it is not to be construed as limiting the specific scope of protection of the present utility model that the device or element referred to must have a specific azimuth configuration and operation.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first", "a second" or "a second" feature may explicitly or implicitly include one or more such feature, and in the description of the utility model, the meaning of "a number" is two or more, unless otherwise specifically defined.

In the present utility model, unless explicitly stated and limited otherwise, the terms "assembled," "connected," and "connected" are to be construed broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; can be directly connected or connected through an intermediate medium, and can be communicated with the inside of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the embodiments of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of embodiments of the utility model. As used in the specification of the embodiments of the utility model and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

Example 1

As shown in fig. 1 to 4, a secondary battery brazing structure includes a substrate 3, wherein the substrate is an aluminum ring (which is required to be used in an independent pole); still include the buckle closure, be provided with a mounting hole 6 on the base plate 3, encircle on the base plate 3 mounting hole 6 is provided with the welding groove 5, the intussuseption of welding groove 5 is filled with brazing material 4, the buckle closure passes through the braze joint with welding groove 5.

In the scheme, the buckle cover is connected with the base plate through brazing, so that the combination interface of the buckle cover and the base plate can bear great tensile force, laser welding is avoided, and the problem that an upper cover structure is difficult to realize in an integrated structure can be solved by using a split structure.

The buckle cover comprises a buckle ring 2 and an annular convex edge 1 arranged at the upper end of the buckle ring 2, and the buckle ring and the annular convex edge are processed in an integrated processing mode, so that the shape of the buckle ring 2 is matched with that of the welding groove 5.

Wherein the snap ring 2 and the weld groove 5 are designed as a clearance fit in order that the snap cap can also be placed into the weld groove after the weld groove has been filled with brazing material.

Wherein, specifically, the welding groove 5 is rectangular or circular.

In this embodiment, in order to improve the stability of the connection between the welded fastening cover and the welding groove, a reinforcing structure for increasing the contact area is disposed in the welding groove 5. Further, the reinforcing structure is small pits, and the small pits are wavy or zigzag.

Wherein the brazing material 4 is in the form of paste or solid sheet and is directly filled in the welding groove 5.

Wherein, the process of brazing the buckle closure and the base is specifically as follows:

s1, coating a brazing material in a welding groove of a light aluminum sheet or an aluminum ring;

s2, adding soldering flux;

s3, after the buckle cover structure is inserted, integrally baking and shaping (welding) at a high temperature, wherein the temperature range is 250-600 ℃;

s4, cooling after shaping, and directly using the product on a cover plate of the secondary battery.

Example 2

As shown in fig. 5 to 7, a secondary battery brazing structure includes a base plate 3, wherein the base plate is a photo aluminum sheet (top cover sheet); still include the buckle closure, be provided with 2 mounting holes 6 on the base plate 3, encircle on the base plate 3 mounting hole 6 is provided with the welding groove 5, the intussuseption of welding groove 5 is filled with brazing material 4, the buckle closure passes through the braze welding with welding groove 5 and is connected.

Wherein, specifically, the welding groove 5 is rectangular or circular.

Example 3

The present embodiment discloses a top cap assembly comprising a brazed post with locating ribs as described in any one of embodiments 1-2.

In this embodiment, it should be noted that the rest of the structural components of the top cover assembly belong to the prior art, and those skilled in the art can design the top cover assembly according to needs, and in this embodiment, the description is omitted.

Example 4

This embodiment discloses a secondary battery including a top cap assembly as described in embodiment 3.

In this embodiment, it should be noted that, the remaining structural components of the secondary battery in this embodiment belong to the prior art, and those skilled in the art can design the secondary battery according to needs, which will not be described in detail in this embodiment.

The foregoing is illustrative of the preferred embodiments of the present utility model and is not to be construed as limiting the claims. The present utility model is not limited to the above embodiments, and the specific structure thereof is allowed to vary. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. A secondary battery brazing structure includes a substrate (3); the method is characterized in that: still include the buckle closure, be provided with at least one mounting hole (6) on base plate (3), encircle on base plate (3) mounting hole (6) are provided with welding groove (5), welding groove (5) intussuseption is filled with brazing material (4), the buckle closure is connected through brazing with welding groove (5).

2. The secondary battery brazing structure according to claim 1, wherein: the buckle cover comprises a buckle ring (2) and an annular convex edge (1) arranged at the upper end of the buckle ring (2), and the shape of the buckle ring (2) is matched with that of the welding groove (5).

3. The secondary battery brazing structure according to claim 2, wherein: the retaining ring (2) is in clearance fit with the welding groove (5).

4. The secondary battery brazing structure according to claim 1, wherein: the welding groove (5) is rectangular or circular.

5. The secondary battery brazing structure according to claim 1, wherein: a reinforcing structure for increasing the contact area is arranged in the welding groove (5).

6. The secondary battery brazing structure according to claim 5, wherein: the reinforcing structure is small pits, and the small pits are wavy or zigzag.

7. The secondary battery brazing structure according to claim 1, wherein: the brazing material (4) is pasty or solid sheet-shaped and is directly filled in the welding groove (5).

8. The secondary battery brazing structure according to claim 1, wherein: the substrate (3) is a light aluminum sheet or an aluminum ring.

9. A top cap subassembly, characterized in that: a secondary battery brazing structure comprising the secondary battery according to any one of claims 1 to 8.

10. A secondary battery characterized in that: comprising a cap assembly according to claim 9.