CN216264291U

CN216264291U - Welding set based on fixed laminate polymer battery utmost point ear

Info

Publication number: CN216264291U
Application number: CN202122650813.3U
Authority: CN
Inventors: 臧春阳
Original assignee: Hefei Guoxuan High Tech Power Energy Co Ltd
Current assignee: Hefei Gotion High Tech Power Energy Co Ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-04-12
Anticipated expiration: 2031-10-29

Abstract

The utility model discloses a welding device based on fixed soft package battery tab, which comprises a steel plate die for fixing a battery core and an outer tab, wherein the outer tab is provided with insulating glue, the steel plate die is provided with a hole, one end of the battery core tab and one end of the outer tab are laminated and arranged at the hole, two sides of the hole are respectively provided with a welding head and a bottom film, and the welding head presses the battery core tab and the outer tab on the bottom film to form a weld core; the welding device enables the insulating glue on the outer electrode lug of the positive electrode and the outer electrode lug of the negative electrode to be flush and regular in the welding process and always be on the same horizontal line, reduces the short circuit rate after packaging of the aluminum plastic film, and increases the success rate of the soft package battery.

Description

Welding set based on fixed laminate polymer battery utmost point ear

Technical Field

The utility model relates to the technical field of lithium battery preparation, in particular to a welding device based on a fixed soft package battery tab.

Background

In the preparation process of the soft package battery, each process is very important for the performance of a finished battery, for example, when an outer tab is welded and an aluminum plastic film is packaged, the positive insulating glue and the negative insulating glue of the outer tab are not even or on the same horizontal line due to artificial errors when the outer tab is welded, and the packaged loose battery is prone to leakage or short circuit when the aluminum plastic film is sealed in a top mode. Poor packaging can reduce the specific capacity of the polymer lithium battery, cause the battery to bulge, lead to the reduction of the cycle life and the electrochemical performance, seriously can cause the battery to lose efficacy, and short circuit can directly cause the battery to be scrapped.

SUMMERY OF THE UTILITY MODEL

Based on the technical problems in the prior art, the utility model provides a welding device based on fixing a soft package battery tab, which reduces the short circuit rate after packaging of an aluminum plastic film and increases the success rate of the soft package battery.

The utility model provides a welding device based on fixed soft package battery tab, which comprises a steel plate die for fixing a battery core and an outer tab, wherein an insulating glue is arranged on the outer tab, a hole is formed in the steel plate die, one end of the battery core tab and one end of the outer tab are laminated and arranged at the hole, a welding head and a bottom film are respectively arranged on two sides of the hole, and the welding head presses the battery core tab and the outer tab down on the bottom film to form a weld core.

Further, be provided with the protruding post of first protruding post, the second that is used for fixed outer utmost point ear that are used for fixing electric core on the steel sheet mould, a plurality of first protruding posts with respectively electric core periphery joint, a plurality of protruding posts of second respectively with outer utmost point ear joint.

Furthermore, a third protruding column used for limiting the position of the insulating glue is arranged on the steel plate die.

Further, outer utmost point ear includes anodal outer utmost point ear and the outer utmost point ear of negative pole, and outer utmost point ear and the outer utmost point ear of negative pole are fixed through the protruding post of second respectively, set up the insulating cement on anodal outer utmost point ear and the outer utmost point ear of negative pole respectively, and the third protruding post of insulating cement on the outer utmost point ear of spacing anodal and the third protruding post of insulating cement on the outer utmost point ear of spacing negative pole are parallel in proper order with high setting.

Furthermore, the two holes are symmetrically arranged, the positive electrode outer tab and the battery cell positive electrode tab are laminated and arranged at one hole, and the negative electrode outer tab and the battery cell negative electrode tab are laminated and arranged at the other hole.

The welding device based on the fixed soft package battery tab has the advantages that: according to the welding device based on the fixed soft package battery tab, which is provided by the structure, the battery core and the outer tab are fixed through the first protruding column and the second protruding column, so that the battery core and the outer tab cannot move in position in the welding process; spacing insulating cement is come to protruding post of third that sets up through the steel sheet mould for insulating cement on anodal outer utmost point ear and the outer utmost point ear of negative pole is regular and be in same water flat line all the time at welding process in parallel and level, has reduced the short circuit rate behind the plastic-aluminum membrane encapsulation, has increased laminate polymer battery's success rate.

Drawings

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

FIG. 2 is a schematic structural view of a steel plate mold;

fig. 3 is a schematic structural diagram of a steel plate die for fixing a battery cell and an external tab;

the battery comprises a battery core 1, an outer tab 2, a steel plate mold 3, a welding head 4, a base film 5, an insulating glue 6, a welding core 7, a positive electrode outer tab 21, a negative electrode outer tab 22, a hole 31, a first protruding column 32, a second protruding column 33 and a third protruding column 34.

Detailed Description

The present invention is described in detail below with reference to specific embodiments, and in the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.

As shown in fig. 1 to 3, the welding device based on the fixed soft package battery tab provided by the utility model comprises a steel plate mold 3 for fixing a battery core 1 and an outer tab 2, wherein a hole 31 is formed in the steel plate mold 3, one end of the battery core tab and one end of the outer tab 2 are laminated at the hole 31, a welding head 4 and a bottom film 5 are respectively arranged on two sides of the hole 31, and the welding head 4 presses the battery core tab and the outer tab 2 down on the bottom film 5 to form a welding core 7.

The steel plate die 3 with the protruding columns and the holes 31 is used, the protruding columns play a role in fixing the battery cell 1 and the outer tab 2, the battery cell 1 and the outer tab 2 are respectively fixed on the steel plate die 3, the hole 31 is drilled at the position, in which the outer tab 2 and the battery cell tab are mutually contacted, on the steel plate die 3, the hole 31 is formed in order to enable a welding head 4 of a welding machine to be in contact with a bottom film 5, a welding core 7 is formed by pressing the contact position of the outer tab 2 and the battery cell tab, so that the insulation glue of the anode and the cathode of the outer tab 2 is leveled on the same horizontal line, the short circuit rate after the aluminum plastic film is packaged is reduced, and the success rate of the soft package battery is increased.

In this embodiment, be provided with the first protruding post 32 that is used for fixed electric core 1 on the steel sheet mould 3, be used for fixed outer utmost point ear 2's the protruding post 33 of second, a plurality of first protruding posts 32 with respectively electric core 1 periphery joint, a plurality of second protruding posts 33 respectively with outer utmost point ear 2 joint.

To outer utmost point ear 2, outer utmost point ear 2 includes anodal outer utmost point ear 21 and the outer utmost point ear 22 of negative pole, outer utmost point ear 2 and the outer utmost point ear 22 of negative pole are fixed through the protruding post 33 of second respectively, set up insulating cement 6 on anodal outer utmost point ear 21 and the outer utmost point ear 22 of negative pole respectively, a third protruding post 34 that is used for insulating cement 6 on the outer utmost point ear 21 of spacing anodal and a third protruding post 34 that is used for insulating cement 6 on the outer utmost point ear 22 of spacing negative pole are parallel in proper order with the high setting, it is spacing with the butt of third protruding post 34, it is on the same water flat line that the insulating cement 6 on anodal outer utmost point ear 21 and the outer utmost point ear 22 of negative pole belongs to all the time.

It should be noted that, in order to be suitable for the positive outer tab 21 and the negative outer tab 22, two holes 31 are provided, the two holes 31 are symmetrically provided, the positive outer tab 21 and the positive tab lamination of the cell 1 are provided at one of the holes 31, and the negative outer tab 22 and the negative tab lamination of the cell 1 are provided at the other hole 31.

In this embodiment, the battery cell 1 and the outer tab 2 are fixed by the first protruding column 32 and the second protruding column 33 which are arranged on the steel plate mold 3, so that in the welding process, the battery cell 1 and the outer tab 2 cannot move in position, and meanwhile, the third protruding column 34 which is arranged on the steel plate mold 3 limits the insulating glue 6, so that the insulating glue 6 on the positive outer tab 21 and the negative outer tab 22 is always on the same horizontal line in the welding process.

The working process is as follows: fix electric core 1 through first protruding post 32 joint, it is fixed through the protruding post 33 joint of second with outer utmost point ear 2, it is spacing that insulating glue 6 passes through third protruding post 34 simultaneously, and electric core utmost point ear and the one end lamination setting of outer utmost point ear 2 are in hole 31 department this moment, through pushing down bonding tool 4, will press electric core utmost point ear and outer utmost point ear 2 to form on basement membrane 5 and weld nuclear 7, accomplish the welding of battery utmost point ear.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. The utility model provides a welding set based on fixed laminate polymer battery utmost point ear, a serial communication port, including steel sheet mould (3) that are used for fixed electric core (1) and outer utmost point ear (2), set up insulating cement (6) on outer utmost point ear (2), set up hole (31) on steel sheet mould (3), the one end lamination setting of electric core utmost point ear and outer utmost point ear (2) is in hole (31) department, the both sides of hole (31) are provided with bonding tool (4) and basement membrane (5) respectively, bonding tool (4) are pushed down and are pressed electric core utmost point ear and outer utmost point ear (2) and form the nuclear welding on basement membrane (5).

2. The welding device based on the fixed soft package battery tab according to claim 1, wherein a plurality of first protruding columns (32) for fixing the battery cell (1) and a plurality of second protruding columns (33) for fixing the outer tab (2) are arranged on the steel plate mold (3), the first protruding columns (32) are clamped with the peripheries of the battery cells (1) respectively, and the second protruding columns (33) are clamped with the outer tab (2) respectively.

3. The welding device based on the fixed soft package battery tab according to the claim 1 is characterized in that a third protruding column (34) used for limiting the position of the insulating glue (6) is arranged on the steel plate die (3).

4. The welding set based on fixed laminate polymer battery utmost point ear of claim 3, characterized in that, outer utmost point ear (2) are including anodal outer utmost point ear (21) and negative pole outer utmost point ear (22), and outer utmost point ear (2) and negative pole outer utmost point ear (22) are fixed through second protruding post (33) respectively, set up insulating cement (6) on anodal outer utmost point ear (21) and the negative pole outer utmost point ear (22) respectively for third protruding post (34) of insulating cement (6) and third protruding post (34) that are used for insulating cement (6) on the spacing anodal outer utmost point ear (21) are parallel in proper order with the high setting.

5. The welding device based on the fixed soft package battery tab according to claim 4, wherein the two holes (31) are symmetrically arranged, the positive electrode outer tab (21) and the positive electrode tab lamination of the battery cell (1) are arranged at one hole (31), and the negative electrode outer tab (22) and the negative electrode tab lamination of the battery cell (1) are arranged at the other hole (31).