CN216563435U

CN216563435U - Soft package lithium ion battery tab

Info

Publication number: CN216563435U
Application number: CN202123109814.3U
Authority: CN
Inventors: 张志华
Original assignee: Shenzhen Xizhuo Electronics Co ltd
Current assignee: Shenzhen Xizhuo Electronics Co ltd
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-05-17
Anticipated expiration: 2031-12-06

Abstract

The utility model belongs to the technical field of battery tabs and discloses a soft package lithium ion battery tab which comprises a film component and a metal belt, the metal belt is fixed inside the film component, the two sides of the film component are both fixed with elastic edge sealing sheets, the outer wall of the elastic edge sealing sheet is fixedly provided with a first flexible seal and a third flexible seal, and the outer wall of the elastic edge sealing sheet is provided with a gap between the first flexible seal and the third flexible seal, after the battery tab penetrates through the aluminum plastic film of the soft package lithium ion battery, the edge of the penetrating opening of the aluminum plastic film is positioned in the notch formed on the elastic edge sealing sheet, then adhering the first flexible seal, the second flexible seal and the third flexible seal to the aluminum plastic film, so as to plug the connection position between the battery tab and the aluminum plastic film, thereby effectively increasing the sealing property and avoiding the leakage at the penetrated position.

Description

Soft package lithium ion battery tab

Technical Field

The utility model belongs to the technical field of battery tabs, and particularly relates to a soft package lithium ion battery tab.

Background

The soft package lithium battery is only provided with a layer of polymer shell on the liquid lithium ion battery, and is structurally packaged by an aluminum plastic film, the soft package lithium battery can blow and crack at most under the condition of potential safety hazard, and can not explode like a steel shell aluminum shell battery cell, wherein a tab is a raw material of a lithium ion polymer battery product, the tab is a metal conductor which is led out from the battery cell and used for leading positive and negative electrodes, ears of the battery, which are popularly called as the contact points when the battery is charged and discharged, and the battery tab is formed by compounding a film and a metal strip.

The leakproofness that the position department that present battery utmost point ear wore out from soft packet of lithium ion battery is relatively poor, after soft packet of lithium ion battery pressurized, takes place the weeping easily, and in addition, the stability of bonding between two films of traditional battery utmost point ear is relatively poor, takes place the separation easily.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a soft package lithium ion battery tab, which aims to solve the problems that the traditional battery tab in the background art has poor sealing performance and is easy to leak liquid at the position where the traditional battery tab penetrates out of a soft package lithium ion battery, and in addition, the traditional battery tab has poor bonding stability between two films and is easy to separate.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a soft packet of lithium ion battery utmost point ear, includes film subassembly and strap, the strap is fixed in the inside of film subassembly, the both sides of film subassembly all are fixed with the elasticity banding piece, the outward appearance wall of elasticity banding piece is fixed with first flexible strip of paper used for sealing and the flexible strip of paper used for sealing of third, elasticity banding piece outer wall just is located and has seted up the opening between first flexible strip of paper used for sealing and the flexible strip of paper used for sealing of third, the upper and lower wall of film subassembly all is fixed with the flexible strip of paper used for sealing of second.

Preferably, the film assembly comprises a first film and a second film, the two ends of the first film facing one side of the second film are integrally formed with embedded blocks, and the two ends of the second film facing one side of the first film are provided with embedded grooves matched with the embedded blocks.

Preferably, the opposite sides of the first film and the second film are provided with clamping grooves.

Preferably, the third flexible seal is collinear with the two second flexible seals.

Preferably, micropores are uniformly formed in the upper surface wall of the second rubber sheet, and the micropores are of a circular structure.

Preferably, the depth of the gap is no more than half the thickness of the elastic edge sealing sheet.

Compared with the prior art, the utility model has the beneficial effects that:

(1) when the battery tab is installed, after the battery tab penetrates through the aluminum plastic film of the soft package lithium ion battery, the edge of the penetrating opening of the aluminum plastic film is positioned in the opening formed on the elastic edge sealing sheet, and then glue solution can be coated on the outer walls of the first flexible sealing strip, the second flexible sealing strip and the third flexible sealing strip, so that the first flexible sealing strip, the second flexible sealing strip and the third flexible sealing strip are adhered on the aluminum plastic film to block the connecting part between the battery tab and the aluminum plastic film, thereby effectively increasing the sealing property and avoiding liquid leakage at the penetrating part.

(2) According to the utility model, by additionally arranging the embedded block and the embedded groove, when the first film and the second film are bonded, the glue solution can be coated on the outer wall of the embedded block and the embedded groove, and then the embedded block is embedded into the embedded groove, so that on one hand, the contact area between the first film and the second film can be increased, the bonding stability is further improved, on the other hand, the butt joint precision of the first film and the second film can be increased, and the occurrence of skew is reduced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of the present invention;

FIG. 3 is an enlarged view of portion A of FIG. 1;

in the figure: 1. a first film; 2. a second film; 3. a clamping groove; 4. a metal strip; 5. an elastic edge sealing sheet; 6. an insert block; 7. a first flexible seal; 8. a second flexible seal; 9. a third flexible seal; 10. micropores; 11. caulking grooves; 12. and (6) opening.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides the following technical solutions: a soft package lithium ion battery tab comprises a film component and a metal band 4, wherein the metal band 4 is fixed inside the film component, two sides of the film component are both fixed with an elastic edge sealing sheet 5, the outer surface wall of the elastic edge sealing sheet 5 is fixed with a first flexible seal 7 and a third flexible seal 9, the outer wall of the elastic edge sealing sheet 5 is positioned between the first flexible seal 7 and the third flexible seal 9 and is provided with a notch 12, the upper wall and the lower wall of the film component are both fixed with a second flexible seal 8, the third flexible seal 9 and the two second flexible seals 8 are positioned on the same straight line, concretely, when the battery tab is installed, after the battery tab passes through an aluminum plastic film of the soft package lithium ion battery, the edge of the through opening of the aluminum plastic film is positioned in the notch 12 arranged on the elastic edge sealing sheet 5, then the outer walls of the first flexible seal 7, the second flexible seal 8 and the third flexible seal 9 can be coated with glue solution, make first flexible strip of paper used for sealing 7, second flexible strip of paper used for sealing 8 and the adhesion of third flexible strip of paper used for sealing 9 on the plastic-aluminum membrane to plug up the position of being connected between this battery utmost point ear and plastic-aluminum membrane, thereby can effectively increase the leakproofness, avoid the position department of wearing out to take place the weeping.

Further, the film assembly comprises a first film 1 and a second film 2, the films are the insulating parts on the tabs, and are used for preventing short circuit between the metal belt 4 and the aluminum plastic film when the battery is packaged, the two ends of the first film 1 facing one side of the second film 2 are integrally formed with the embedded blocks 6, the two ends of the second film 2 facing one side of the first film 1 are provided with the embedded grooves 11 matched with the embedded blocks 6, specifically, when the first film 1 and the second film 2 are bonded, glue can be coated on the outer wall of the embedded blocks 6 and the embedded grooves 11, then the embedded blocks 6 are embedded into the embedded grooves 11, on one hand, the contact area between the first film 1 and the second film 2 can be increased, and further the bonding stability is improved, on the other hand, the butt joint precision of the first film 1 and the second film 2 can be increased, and the skew occurrence is reduced.

Further, a clamping groove 3 is formed in one side, opposite to the first rubber sheet 1 and the second rubber sheet 2, and the two clamping grooves 3 are combined to form a space for placing a metal belt 4.

Furthermore, micropores 10 are uniformly formed in the upper surface wall of the second rubber sheet 2, the micropores 10 are of a circular structure, and the heat dissipation of the metal belt 4 can be accelerated by the formed micropores 10.

Furthermore, the depth of the notch 12 is not more than one half of the thickness of the elastic edge sealing sheet 5, and the arrangement of the depth of the notch 12 can avoid the elastic edge sealing sheet 5 from being broken at the notch 12 to generate cracks, thereby ensuring the sealing effect.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a soft packet of lithium ion battery utmost point ear which characterized in that: including film subassembly and strap (4), strap (4) are fixed in the inside of film subassembly, the both sides of film subassembly all are fixed with elasticity banding piece (5), the outward appearance wall of elasticity banding piece (5) is fixed with first flexible seal (7) and third flexible seal (9), elasticity banding piece (5) outer wall just is located and has seted up opening (12) between first flexible seal (7) and the third flexible seal (9), the wall all is fixed with second flexible seal (8) about the film subassembly.

2. The soft package lithium ion battery tab of claim 1, characterized in that: the film assembly comprises a first film (1) and a second film (2), wherein the first film (1) is provided with an embedded block (6) towards the two ends of one side of the second film (2) in an integrated manner, and the second film (2) is provided with an embedded groove (11) matched with the embedded block (6) towards the two ends of one side of the first film (1).

3. The soft package lithium ion battery tab of claim 2, characterized in that: the clamping groove (3) is formed in one side, opposite to the first film (1) and the second film (2), of the film.

4. The soft package lithium ion battery tab of claim 3, characterized in that: the third flexible seal (9) and the two second flexible seals (8) are in the same straight line.

5. The soft package lithium ion battery tab of claim 4, characterized in that: micropores (10) are uniformly formed in the upper surface wall of the second rubber sheet (2), and the micropores (10) are of a circular structure.

6. The soft package lithium ion battery tab of claim 5, characterized in that: the depth of the gap (12) is not more than half of the thickness of the elastic edge sealing sheet (5).