CN218769802U

CN218769802U - Battery steel cap and lithium battery

Info

Publication number: CN218769802U
Application number: CN202222992685.5U
Authority: CN
Inventors: 魏文艳; 徐晓勇; 郝世洪
Original assignee: Changzhou Wujin Zhongrui Electronic Technology Co ltd
Current assignee: Changzhou Wujin Zhongrui Electronic Technology Co ltd
Priority date: 2022-11-10
Filing date: 2022-11-10
Publication date: 2023-03-28
Anticipated expiration: 2032-11-10

Abstract

The utility model relates to a battery field specifically relates to a battery steel cap and lithium cell, battery steel cap for the lithium cell, including sealing washer, explosion-proof aluminum sheet and contact piece, the sealing washer configuration is at the tip of lithium cell, and explosion-proof aluminum sheet configuration just keeps away from the main part of lithium cell in the sealing washer, and the middle part of explosion-proof aluminum sheet is formed with the concave ring that deforms, has seted up the fracture groove in the concave ring, and the contact piece includes parallel arrangement's foundation ring and contact circle, foundation ring and explosion-proof aluminum sheet's outer lane fixed connection, and the contact circle passes through the inner ring fixed connection of support column and foundation ring, has seted up the deformation groove on the support column, and simultaneously, the junction of foundation ring and contact circle is formed with disappointing hole. The technical problems that in the prior art, the air leakage effect of a lithium battery is poor and the capacity of the battery cannot be improved are solved.

Description

Battery steel cap and lithium battery

Technical Field

The utility model relates to a battery field specifically relates to a battery steel cap and lithium cell.

Background

Lithium batteries are a type of battery using a nonaqueous electrolyte solution with lithium metal or a lithium alloy as a negative electrode material. The earliest lithium batteries came from the great inventor edison, using the following reaction: li + MnO2= LiMnO2 the reaction is a redox reaction, discharging. Because the chemical characteristics of lithium metal are very active, the requirements on the environment for processing, storing and using the lithium metal are very high. Need leave sufficient space between explosion-proof aluminum sheet and contact piece during the design of lithium cell, so that explosion-proof aluminum sheet has sufficient deformation space to carry out the pressure release, the in-process contact piece of pressure release is motionless, this kind of mode explosion-proof aluminum sheet is opened the back to the battery to the upset of contact piece department, easily block up the hole of losing heart on the contact piece, unable quick pressure release, on the other hand has still prescribed a limit to the required space that occupies of lithium cell cap body part, because the lithium cell external dimension of same model is a definite value, the unable shrink in lithium cell cap body part space, also make the scheme of wanting to promote battery capacity through increase lithium cell main part become unable the realization.

Disclosure of Invention

In order to solve the technical problem that the lithium battery is poor in air leakage effect and the battery capacity cannot be improved due to the fact that the design problem of the battery steel cap in the prior art, the application provides the battery steel cap, and the technical problem is solved.

The utility model provides a technical scheme that its technical problem adopted is:

the utility model provides a battery steel cap for the lithium cell, include: a seal ring disposed at an end of the lithium battery; the anti-explosion aluminum sheet is arranged in the sealing ring and is far away from the main body of the lithium battery, a deformation concave ring is formed in the middle of the anti-explosion aluminum sheet, and a fracture scribing line is arranged in the concave ring; the contact piece, the contact piece includes parallel arrangement's foundation ring and contact ring, the foundation ring with explosion-proof aluminum sheet's outer lane fixed connection, the contact ring pass through the support column with the inner ring fixed connection of foundation ring, the deformation groove has been seted up on the support column, simultaneously, the junction of foundation ring and contact ring is formed with the hole of losing heart.

The utility model provides a battery steel cap, the middle part of explosion-proof aluminum sheet is formed with the deformation notch ring, the fracture groove has been seted up in the notch ring, and seted up the deformation groove on the support column of contact piece, can push away the contact piece together when explosion-proof aluminum sheet opens, thereby the exhaust area has been increased, reach the purpose of quick pressure release, the security of battery has been increased, and simultaneously, because explosion-proof aluminum sheet can push away the contact piece together when opening, just can reduce the distance between the contact ring of explosion-proof aluminum sheet and contact piece, increase battery capacity, increase exhaust area, shorten exhaust time, the technical problem that the effect of losing heart of lithium cell is not good and battery capacity can't promote among the prior art has been solved.

Furthermore, the projection of the deformation scribed line on the explosion-proof aluminum sheet is in the coverage range of the air leakage hole.

Furthermore, the deformation score lines are distributed on the contact sheet in an annular shape, and the support part of the support column is not full of the deformation score lines on at least one support column.

Furthermore, the two ends of the supporting part of the supporting column, which are not engraved with the deformation scribed lines, form an included angle alpha with the connecting line of the circle centers of the contact pieces.

Further, the included angle α is 20 degrees.

Further, the residual thickness of the deformation scribed line on the support column is 0.1-0.3 mm.

Furthermore, the air release holes are distributed on the contact sheet in an annular shape.

Further, the number of the air leakage holes is three.

Another aspect of the present application also provides a lithium battery, including the above battery steel cap.

Based on the technical scheme, the utility model discloses the technological effect that can realize does:

the utility model provides a battery steel cap, the middle part of explosion-proof aluminum sheet is formed with the deformation concave ring, the fracture groove has been seted up in the concave ring, and the deformation groove has been seted up on the support column of contact piece, can back open the contact piece together when explosion-proof aluminum sheet opens, thereby the exhaust area has been increased, reach the purpose of quick pressure release, the security of battery has been increased, and simultaneously, because explosion-proof aluminum sheet can back open the contact piece together when opening, just can reduce the distance between the contact ring of explosion-proof aluminum sheet and contact piece, increase battery capacity, increase exhaust area, shorten exhaust time, the technical problem that the effect is lost heart not good and battery capacity can't promote among the prior art to the lithium cell has been solved.

The utility model provides a battery steel cap, the projection is in the coverage in disappointing hole on explosion-proof aluminum sheet to deformation groove to make explosion-proof aluminum sheet can drive better and push away the contact piece.

The utility model provides a battery steel cap, deformation groove are the cyclic annular and distribute on the contact chip, and the support part of support column is not carved with to the deformation groove on at least one support column. Thus, the contact ring on the upper part of the contact piece can be prevented from being completely ejected, which causes a safety problem.

Drawings

FIG. 1 is a cross-sectional view of a steel battery cap of the present application before deformation;

FIG. 2 is a cross-sectional view of a deformed battery steel cap of the present application;

fig. 3 is a schematic view of a battery steel cap of the present application.

Wherein: 1-a sealing ring; 2-explosion-proof aluminum sheet, 21-deformation concave ring, and 22-fracture scribing; 3-contact piece, 31-bottom ring, 32-contact ring, 33-support column and 331-deformation reticle; 34-air relief holes.

Description of the preferred embodiment

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

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 application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of parts and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; 'above" may include both orientations "at 8230; \8230;' above 8230; 'at 8230;' below 8230;" above ". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

As shown in fig. 1-3, the application provides a battery steel cap, be used for the lithium cell, including the sealing washer, explosion-proof aluminum sheet and contact piece, the sealing washer configuration is at the tip of lithium cell, explosion-proof aluminum sheet configuration just keeps away from the main part of lithium cell in the sealing washer, the middle part of explosion-proof aluminum sheet is formed with the deformation scrobicular ring, the groove of splitting has been seted up in the scrobicular ring, the contact piece includes parallel arrangement's end collar and contact ring, the end collar is with the outer lane fixed connection of explosion-proof aluminum sheet, the contact ring passes through the inner ring fixed connection of support column and end collar, the deformation groove has been seted up on the support column, simultaneously, the junction of end collar and contact ring is formed with the hole of losing heart.

In a preferred embodiment of the present application, the projection of the deformed reticle on the explosion-proof aluminum sheet is within the coverage of the air leakage hole, so that the explosion-proof aluminum sheet can better drive and jack open the contact sheet.

In a preferred embodiment of the present application, the deformation scribes are distributed on the contact sheet in a ring shape, and the deformation scribes on at least one of the support columns are not completely scribed on the support portion of the support column. Thus, the contact ring at the upper part of the contact piece can be prevented from being completely ejected, which causes a safety problem.

Furthermore, the two ends of the supporting part of the supporting column which is not provided with the deformation scribed line form an included angle alpha with the connecting line of the circle centers of the contact pieces.

Further, the included angle α is 20 degrees.

In a preferred embodiment of the present application, the residual thickness of the deformed score line on the support post is 0.1-0.3 mm.

In a preferred embodiment of the present application, the plurality of air release holes are uniformly distributed on the contact piece in a ring shape.

Further, the number of the air leakage holes is three.

It should be understood that the above description of the specific embodiments is only for the purpose of explanation and not for the purpose of limitation. Obvious changes or variations caused by the spirit of the present invention are within the scope of the present invention.

Claims

1. A battery steel cap for a lithium battery, comprising:

a sealing ring disposed at an end of the lithium battery;

the anti-explosion aluminum sheet is arranged in the sealing ring and is far away from the main body of the lithium battery, a deformation concave ring is formed in the middle of the anti-explosion aluminum sheet, and a fracture scribing line is arranged in the concave ring;

the contact piece, the contact piece includes parallel arrangement's foundation ring and contact ring, the foundation ring with the outer lane fixed connection of explosion-proof aluminum sheet, the contact ring pass through the support column with the inner ring fixed connection of foundation ring, the deformation groove has been seted up on the support column, simultaneously, the junction of foundation ring and contact ring is formed with disappointing hole.

2. The battery steel cap of claim 1, wherein the deformation score line projects on the explosion-proof aluminum sheet within the coverage of the air leakage hole.

3. The battery steel cap of claim 1, wherein the deformation score lines are distributed on the contact pieces in an annular shape, and the support portions of the support posts are not full of the deformation score lines on at least one of the support posts.

4. The battery steel cap of claim 3, wherein the two ends of the supporting part of the supporting column, on which the deformation score lines are not engraved, form an included angle α with a connecting line of the centers of the circles of the contact pieces.

5. The battery steel cap of claim 4, wherein the included angle α is 20 degrees.

6. The battery steel cap of claim 1, wherein the residual thickness of the deformed score line on the support post is 0.1-0.3 mm.

7. The steel cap for battery according to claim 1, wherein the air release holes are a plurality of air release holes and are uniformly distributed on the contact sheet in a ring shape.

8. The battery steel cap of claim 7, wherein the number of the air leakage holes is three.

9. A lithium battery comprising a battery steel cap according to any one of claims 1 to 8.