CN219457932U

CN219457932U - Explosion-proof valve structure and secondary cell top cap subassembly

Info

Publication number: CN219457932U
Application number: CN202320118562.0U
Authority: CN
Inventors: 王雷; 徐月红; 邓平华
Original assignee: Jiangxi Baisili New Energy Technology Co ltd
Current assignee: Jiangxi Baisili New Energy Technology Co ltd
Priority date: 2023-01-31
Filing date: 2023-01-31
Publication date: 2023-08-01
Anticipated expiration: 2033-01-31

Abstract

The utility model discloses an explosion-proof valve structure and a top cover assembly of a secondary battery, wherein the explosion-proof valve structure comprises a protection sheet and an explosion-proof valve, the protection sheet and the explosion-proof valve are both arranged on the top cover assembly of the secondary battery, and the protection sheet is provided with a vent hole; and a blocking structure for blocking electrolyte from entering the explosion-proof valve from the vent hole is arranged on the protection sheet around the vent hole. According to the utility model, the blocking structure is arranged on the protection sheet, so that electrolyte can be effectively prevented from flowing into the explosion-proof valve.

Description

Explosion-proof valve structure and secondary cell top cap subassembly

Technical Field

The utility model relates to the technical field of batteries, in particular to an explosion-proof valve structure and a secondary battery top cover assembly.

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.

The lithium battery is usually provided with a liquid injection hole and an explosion-proof valve, wherein the liquid injection hole is used for injecting electrolyte into the battery in the battery production process, and the explosion-proof valve is used for preventing the battery from explosion.

In the production process of the lithium battery, when electrolyte is injected into the battery, the electrolyte overflows, so that the electrolyte is easy to flow into the explosion-proof valve, the lithium battery is not easy to clean, and the residual electrolyte is easy to cause the failure of the explosion-proof valve.

Disclosure of Invention

The utility model aims to solve the problems that: the utility model provides an explosion-proof valve structure and secondary cell top cap subassembly through set up the structure that blocks on the protection piece, can effectually prevent that electrolyte from flowing into in the explosion-proof valve.

The technical scheme provided by the utility model for solving the problems is as follows: the explosion-proof valve structure comprises a protection sheet and an explosion-proof valve, wherein the protection sheet and the explosion-proof valve are both arranged on a top cover assembly of a secondary battery, and the protection sheet is provided with a vent hole; and a blocking structure for blocking electrolyte from entering the explosion-proof valve from the vent hole is arranged on the protection sheet around the vent hole.

Preferably, the blocking structure is an annular retainer ring.

Preferably, the blocking structure is an annular groove.

Preferably, the explosion-proof valve is provided with a first groove section and a second groove section, the two groove sections are symmetrically distributed on two sides of the explosion-proof valve, the second groove section comprises a linear groove section and arc groove sections respectively arranged on two sides of the linear groove section, two ends of the first groove section are respectively connected with the linear groove sections of the two groove sections, and two ends of the two groove sections are connected through bending sections.

Preferably, the explosion-proof valve is provided with two U-shaped reinforcing ribs.

Preferably, the two U-shaped reinforcing ribs are symmetrically distributed on the explosion-proof valve, and the opening directions of the two U-shaped reinforcing ribs are both directed to the first groove section.

Preferably, the depth of the second groove section is smaller than the depth of the first groove section.

The utility model also discloses a secondary battery top cover assembly, which comprises the explosion-proof valve structure.

Compared with the prior art, the utility model has the advantages that: according to the utility model, the blocking structure is arranged on the protection sheet, so that electrolyte can be effectively prevented from flowing into the explosion-proof valve.

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 view of the structure of a protective sheet of embodiment 1 of the present utility model;

fig. 2 is a schematic view of the structure of a protective sheet of embodiment 2 of the present utility model;

FIG. 3 is a schematic structural view of the explosion-proof valve of the present utility model;

FIG. 4 is a cross-sectional view of the explosion valve of the present utility model;

FIG. 5 is a schematic view showing the structure of embodiment 3 of the present utility model;

fig. 6 is a schematic structural view of embodiment 4 of the present utility model.

The drawings are marked: 1. the protective cover comprises a top cover piece, 2, a protective piece, 3, an annular groove, 4, a vent hole, 5, a negative pole column component, 6, a positive pole column component, 7, an annular check ring, 8, an explosion-proof valve, 9, a straight line groove section, 10, an arc groove section, 11, a bending section, 12, a U-shaped reinforcing rib, 13 and a groove section I.

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, the explosion-proof valve structure comprises a protection sheet 2 and an explosion-proof valve 8, wherein the protection sheet 2 and the explosion-proof valve 8 are both arranged on a top cover assembly of a secondary battery, and a vent 4 is arranged on the protection sheet 2; the protection sheet 2 is provided with a blocking structure surrounding the vent hole 4 for blocking electrolyte from entering the explosion-proof valve 8 from the vent hole 4, wherein the blocking structure is an annular groove 3, and the annular groove is easier to process and manufacture relative to the annular check ring.

In this embodiment, specifically, the explosion-proof valve 8 is provided with a first groove section 13 and two second groove sections, the two second groove sections are symmetrically distributed on two sides of the explosion-proof valve 8, the two second groove sections include a linear groove section 9 and arc groove sections respectively arranged on two sides of the linear groove section 9, two ends of the first groove section 13 are respectively connected with the linear groove sections 9 of the two second groove sections, and two ends of the two second groove sections are connected through bending sections 11. When the explosion-proof valve bursts, the explosion-proof valve bursts along the first groove section and the second groove section, after burst, the explosion-proof valve is divided into two halves to be bent along the bending section, and the explosion-proof valve cover is prevented from being completely flushed away from the top cover sheet through the bending section, so that damage to other parts is avoided.

Wherein, the explosion-proof valve 8 is provided with two U-shaped reinforcing ribs 12. The explosion-proof valve can be prevented from deforming and cracking in the transportation process by the aid of the two U-shaped reinforcing ribs, the plane stress distribution of the explosion-proof valve is changed by the aid of the U-shaped reinforcing ribs, the explosion-proof valve plates are gradually burst along the notch, a plurality of splashing fragments separated from the top cover plate can be prevented from being formed when the explosion-proof valve plates burst, other equipment on the periphery of the power battery is protected from being damaged due to impact of the splashing fragments, and safety of the power battery is improved.

It should be noted that the two U-shaped reinforcing ribs 12 are symmetrically distributed on the explosion-proof valve 8, and the opening directions of the two U-shaped reinforcing ribs 12 are both directed to the groove section one 13.

More specifically, the depth of the second groove section is smaller than the depth of the first groove section 13.

Example 2

The difference between this embodiment and embodiment 1 is that the blocking structure in this embodiment is an annular retainer ring, and through which electrolyte can be effectively prevented from entering the explosion-proof valve through the vent hole.

Example 3

The embodiment discloses a secondary battery top cap subassembly, and it has included top cap piece, anodal post subassembly, negative pole post subassembly and the explosion-proof valve structure in the embodiment 1, and other structures belong to prior art, just will not be described here in detail.

Example 4

The embodiment discloses a secondary battery top cap subassembly, and it has included top cap piece, anodal post subassembly, negative pole post subassembly and the explosion-proof valve structure in the implementation 2, and other structures belong to prior art, just will not be described in detail here.

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. The explosion-proof valve structure comprises a protection sheet (2) and an explosion-proof valve (8), wherein the protection sheet (2) and the explosion-proof valve (8) are arranged on a top cover assembly of a secondary battery, and an air vent (4) is arranged on the protection sheet (2); the method is characterized in that: a blocking structure for blocking electrolyte from the vent hole (4) to the inside of the explosion-proof valve (8) is arranged on the protection sheet (2) around the vent hole (4); the blocking structure is an annular groove (3).

2. An explosion-proof valve structure according to claim 1, wherein: the anti-explosion valve is characterized in that a first groove section (13) and a second groove section (8) are arranged on the anti-explosion valve, the two groove sections are symmetrically distributed on two sides of the anti-explosion valve (8), the second groove section comprises a linear groove section (9) and arc groove sections which are respectively arranged on two sides of the linear groove section (9), two ends of the first groove section (13) are respectively connected with the linear groove sections (9) of the second groove section, and two ends of the second groove section are connected through bending sections (11).

3. An explosion-proof valve structure according to claim 2, wherein: two U-shaped reinforcing ribs (12) are arranged on the explosion-proof valve (8).

4. An explosion-proof valve structure according to claim 3, wherein: the two U-shaped reinforcing ribs (12) are symmetrically distributed on the explosion-proof valve (8), and the opening directions of the two U-shaped reinforcing ribs (12) are both directed to the first groove section (13).

5. An explosion-proof valve structure according to claim 2, wherein: the depth of the groove section II is smaller than that of the groove section I (13).

6. A secondary battery top cap assembly, characterized in that: an explosion proof valve arrangement comprising the valve of any one of claims 1-5.