CN219917475U

CN219917475U - Explosion-proof piece line-marking structure and battery cap body

Info

Publication number: CN219917475U
Application number: CN202321260014.8U
Authority: CN
Inventors: 郝世洪; 顾涛; 张舒玲
Original assignee: Changzhou Wujin Zhongrui Electronic Technology Co ltd
Current assignee: Changzhou Wujin Zhongrui Electronic Technology Co ltd
Priority date: 2023-05-23
Filing date: 2023-05-23
Publication date: 2023-10-27
Anticipated expiration: 2033-05-23

Abstract

The utility model relates to the field of batteries, in particular to a rupture disc scribing structure and a battery cap body. The technical problem that explosion-proof piece scribing in the prior art is easy to damage during module welding is solved.

Description

Explosion-proof piece line-marking structure and battery cap body

Technical Field

The utility model relates to the field of batteries, in particular to an explosion-proof sheet scribing structure and a battery cap body.

Background

The positive terminal of the lithium battery needs to be provided with a safety component, the safety component comprises a bursting disc, and the bursting disc needs to be welded with a module component 3 (shown as a mark in fig. 1) to form a closed circuit (simply called module welding).

When welding, the explosion-proof piece can lead to the product deformation because of the welding atress, and the clearance is done greatly between explosion-proof piece and the module 3 (as marked in fig. 1), leads to welding not to go up or circumstances such as poor welding appear, simultaneously, and the welding atress can make the score line damage even fracture, causes the battery to have the potential safety hazard, can lead to unable normal circular telegram because of the score line fracture even, causes whole battery to scrap.

Disclosure of Invention

In order to solve the technical problem that explosion-proof sheet scribing lines in the prior art are easy to damage during module welding, the utility model provides an explosion-proof sheet scribing structure and a battery cap body, and solves the technical problem.

The technical scheme adopted for solving the technical problems is as follows:

an aspect of the present utility model provides a rupture disc scribing structure configured on a rupture disc of a battery, including at least two sections of scribing arcs having a ring shape and being distributed at intervals, so as to form a supporting portion at intervals of the scribing arcs.

According to the anti-explosion sheet scribing structure, the strength of the supporting parts formed at the intervals of the scribing arcs is larger than that of the scribing arcs, more force can be born than the scribing arcs when welding stress is applied, and damage to the scribing arcs is reduced, so that the technical problem that anti-explosion sheet scribing in the prior art is easy to damage when a module is welded is solved.

Further, the score arc is two segments. The two-section type scribing arc at intervals is provided with the supporting part with larger strength and no scribing arc area between the scribing arcs, so that the damage of module welding to the scribing arcs can be reduced. When the client module is welded, the strength of the supporting part of the non-scribing area is high, the deformation of the explosion-proof piece can be reduced, the gap between the die piece and the explosion-proof piece can be reduced, the risks of welding failure and poor welding can be reduced, and the yield after welding can be increased.

Further, the depth of the scribing arc in the explosion proof sheet gradually increases from the two ends to the middle of the scribing arc. The gradual change of the welding line arc is to gradually change the welding line allowance and the welding line depth from the central position of the welding line arc to the two end positions so as to strengthen the structural strength, reduce the damage of the welding force of the module to the welding line arc and ensure the welding gap. The greater the depth of the score line arc, the smaller the margin of the explosion-proof sheet material at the score line arc, the easier the deformation is caused when the stress is applied, and the larger the welding interval of the modules is. According to the utility model, when the pressure relief is ensured to be opened, the gradual change scribing method is adopted, the structural strength is increased, the depth of the part of the middle part of the scribing arc, which is etched into the rupture disc, is maximum, namely the allowance of the part of the rupture disc, which is not etched into the rupture disc is minimum, and the depth of the scribing arc, which is etched into the rupture disc, is gradually reduced along with the extension of the middle part of the scribing arc to the positions of the first end and the last end of the scribing arc, and the depth of the scribing arc, which is etched into the rupture disc, is minimum, namely the allowance of the part of the rupture disc, which is not etched into the rupture disc is maximum, the strength of the rupture disc at the scribing arc is maximum, and the probability of damaging the scribing arc during module welding is further reduced.

Further, the margin of the non-carved part of the explosion-proof sheet at the two ends of the carved wire arc is 0.1-0.3mm.

Further, the non-etched part of the rupture disc is 0.7-1mm in the middle of the score line arc.

The utility model further provides a battery cap body, which comprises the explosion-proof piece and a sealing ring, wherein the explosion-proof piece is provided with the explosion-proof piece scribing structure, and the sealing ring is enveloped on the outer ring of the explosion-proof piece.

Based on the technical scheme, the utility model has the following technical effects:

In the preferred scheme of the explosion-proof sheet scribing structure provided by the utility model, the scribing arc is divided into two sections. The two-section type scribing arc at intervals is provided with the supporting part with larger strength and no scribing arc area between the scribing arcs, so that the damage of module welding to the scribing arcs can be reduced. When the client module is welded, the strength of the supporting part of the non-scribing area is high, the deformation of the explosion-proof piece can be reduced, the gap between the die piece and the explosion-proof piece can be reduced, the risks of welding failure and poor welding can be reduced, and the yield after welding can be increased.

In the preferred scheme of the explosion-proof sheet scribing structure provided by the utility model, the depth of the scribing arc scribing into the explosion-proof sheet gradually increases from the two ends to the middle of the scribing arc. The gradual change of the welding line arc is to gradually change the welding line allowance and the welding line depth from the central position of the welding line arc to the two end positions so as to strengthen the structural strength, reduce the damage of the welding force of the module to the welding line arc and ensure the welding gap. The greater the depth of the score line arc, the smaller the margin of the explosion-proof sheet material at the score line arc, the easier the deformation is caused when the stress is applied, and the larger the welding interval of the modules is. According to the utility model, when the pressure relief is ensured to be opened, the gradual change scribing method is adopted, the structural strength is increased, the depth of the part of the middle part of the scribing arc, which is etched into the rupture disc, is maximum, namely the allowance of the part of the rupture disc, which is not etched into the rupture disc is minimum, and the depth of the scribing arc, which is etched into the rupture disc, is gradually reduced along with the extension of the middle part of the scribing arc to the positions of the first end and the last end of the scribing arc, and the depth of the scribing arc, which is etched into the rupture disc, is minimum, namely the allowance of the part of the rupture disc, which is not etched into the rupture disc is maximum, the strength of the rupture disc at the scribing arc is maximum, and the probability of damaging the scribing arc during module welding is further reduced.

Drawings

FIG. 1 is a schematic diagram of a battery cap of the present utility model for die set welding;

fig. 2 is a schematic view of a burst disk score line structure of the present utility model.

Wherein: 1-an explosion-proof piece, 11-a wire-cutting arc and 12-a supporting part; 2-a sealing ring; 3-die assembly.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

As shown in fig. 1-2, the present utility model provides a rupture disc scribing structure, which is configured on a rupture disc 1 of a battery, and comprises at least two sections of scribing arcs 11 which are annular and distributed at intervals, so as to form supporting parts 12 at intervals of the scribing arcs 11.

According to the explosion-proof sheet scribing structure provided by the utility model, the strength of the supporting parts 12 formed at the intervals of the scribing arcs 11 is larger than that of the scribing portions, and the supporting parts can bear more force than the scribing arcs 11 when being welded with the die assembly 3, so that the damage to the scribing arcs 11 is reduced, and the technical problem that the scribing of the explosion-proof sheet 1 in the prior art is easy to damage when the die assembly is welded is solved.

In a preferred embodiment of the utility model, the score line arc 11 is two-segment. The two-section type scribing arc 11 at intervals, the supporting part 12 with larger strength and without the scribing arc 11 area exists between the scribing arcs 11, so that the damage of module welding to the scribing arc 11 can be reduced. When the client module is welded, the strength of the supporting part 12 in the non-scribing area is high, the deformation of the explosion-proof piece 1 can be reduced, the gap between the die piece and the explosion-proof piece 1 is reduced, the risks of welding failure and poor welding are reduced, and the yield after welding is increased.

In a preferred embodiment of the present utility model, the depth of the score arc 11 into the rupture disc 1 increases gradually from the ends to the middle of the score arc 11. The gradual change of the line arc 11 is to gradually change the line allowance and the line depth from the center position of the line arc 11 to the two end positions, so as to strengthen the structural strength, reduce the damage of the welding force of the die set to the line arc 11 and ensure the welding gap. The greater the depth of the score line arc 11, the smaller the material allowance of the explosion protection sheet 1 at the score line arc 11, the easier the deformation is caused when the stress is applied, and the larger the welding interval of the modules is. According to the utility model, when the pressure relief is ensured to be opened, the gradual change scribing method is adopted, the structural strength is increased, the depth of the part of the middle part of the wire arc 11, which is etched into the anti-explosion sheet 1, is maximum, that is, the allowance of the part of the anti-explosion sheet 1, which is not etched into the anti-explosion sheet 1, is minimum, the depth of the wire arc 11, which is etched into the anti-explosion sheet 1, is gradually reduced along with the extension of the middle part of the wire arc 11 to the positions of the first end and the second end of the wire arc 11, and the depth of the wire arc 11, which is etched into the anti-explosion sheet 1, is minimum, that is, the allowance of the part of the anti-explosion sheet 1, which is not etched into the wire arc 11, is maximum, and the strength of the anti-explosion sheet 1 at the wire arc 11 is enhanced, so that the probability of damaging the wire arc 11 during module welding is further reduced.

In a preferred embodiment of the utility model, the non-scored portion of the rupture disc 1 is left at the ends of the score arc 11 at 0.1-0.3mm.

In a preferred embodiment of the utility model, the non-scored portion of the rupture disc 1 is 0.7-1mm in the middle of the score arc 11.

The utility model further provides a battery cap body, which comprises the explosion-proof piece 1 and the sealing ring 2, wherein the explosion-proof piece scribing structure is arranged on the explosion-proof piece 1, and the sealing ring 2 is enveloped on the outer ring of the explosion-proof piece 1.

It should be understood that the above-described specific embodiments are only for explaining the present utility model and are not intended to limit the present utility model. Obvious variations or modifications which extend from the spirit of the present utility model are within the scope of the present utility model.

Claims

1. The utility model provides a rupture disk scribing structure, disposes on rupture disk (1) of battery, its characterized in that includes at least two sections and takes the form of annular and interval distribution's scribing arc (11) to form supporting part (12) in the interval department of scribing arc (11).

2. The rupture disc score line structure of claim 1, wherein the score arc (11) is two-segment.

3. The rupture disc score line structure according to claim 1 or 2, characterized in that the depth of the score line arc (11) into the rupture disc (1) increases gradually from both ends to the middle of the score line arc (11).

4. A rupture disc score line structure according to claim 3, characterized in that the part of the rupture disc (1) not scored is 0.1-0.3mm in the margin of the two ends of the score line arc (11).

5. A rupture disc score line structure according to claim 3, characterized in that the part of the rupture disc (1) not scored is 0.7-1mm in the middle of the score line arc (11).

6. A battery cap, comprising:

a rupture disc (1), the rupture disc (1) being provided with a rupture disc score line structure according to any one of claims 1-5;

the sealing ring (2), sealing ring (2) envelops the outer lane of explosion-proof piece (1).