CN216758717U

CN216758717U - Lithium battery welding clamp

Info

Publication number: CN216758717U
Application number: CN202122638185.7U
Authority: CN
Inventors: 杨东平; 殷湛; 陈志勇
Original assignee: Guangdong Mic Power New Energy Co Ltd
Current assignee: Guangdong Mic Power New Energy Co Ltd
Priority date: 2021-11-01
Filing date: 2021-11-01
Publication date: 2022-06-17
Anticipated expiration: 2031-11-01

Abstract

The utility model relates to the technical field of lithium battery welding, and discloses a lithium battery welding fixture which comprises a base, a battery cell limiting assembly and a positioning cover plate, wherein the battery cell limiting assembly is embedded in the base and used for placing a battery cell and a nickel sheet, the end part of the nickel sheet is lapped on the top of the battery cell, the positioning cover plate is placed on the battery cell limiting assembly, a welding through hole which is aligned with the top surface of the battery cell is formed in the positioning cover plate, and a welding needle is used for welding the top surface of the battery cell through the welding through hole, so that the battery cell and the nickel sheet are welded and fixed.

Description

Lithium battery welding clamp

Technical Field

The utility model relates to the technical field of lithium battery welding, in particular to a lithium battery welding clamp.

Background

In the existing welding procedure of the battery core and the nickel plate of the lithium battery, pure hands are mostly adopted for welding, an operator needs to hold the battery core by hands to fix the battery core, then the nickel plate is taken to carry out single-point position welding, the middle processing efficiency is low, the welding precision is not high, the welding spot appearance and the position of each battery core are more or less deviated, and the batch standardized production requirements are difficult to meet.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems in the prior art, and provides a lithium battery welding fixture which is used for positioning a battery core and a nickel sheet to be processed and accurately guiding a welding point so as to improve the accuracy of welding operation.

The technical effect to be achieved by the utility model is realized by the following technical scheme:

the utility model provides a lithium battery welding jig, includes base, the spacing subassembly of electric core and locating cover plate, the spacing subassembly of electric core scarf joint is in among the base, the spacing subassembly of electric core is used for placing electric core and nickel piece, and the tip of nickel piece is taken and is put at the top of electric core, place on the spacing subassembly of electric core locating cover plate, be equipped with the welding through-hole of aiming at electric core top surface on the locating cover plate, through passing through with the welding needle the welding through-hole comes to implement the welding to electric core top surface to with electric core and nickel piece welded fastening.

Preferably, the welding through hole is smaller than the area of the top surface of the battery cell.

Preferably, the battery cell limiting assembly is provided with a plurality of battery cell placing grooves side by side, each battery cell placing groove is used for placing one battery cell, each nickel sheet placing groove is formed in one side of each battery cell placing groove, one end of each nickel sheet is arranged in each nickel sheet placing groove, and the other end of each nickel sheet extends outwards and is arranged on the top surface of each battery cell.

Preferably, the positioning cover plate is provided with pressing claws protruding outwards, the shape and the size of each pressing claw are matched with those of the nickel sheet, and when the positioning cover plate covers the nickel sheet, the pressing claws are abutted against the top surface and the side surfaces of the nickel sheet, so that the nickel sheet is positioned.

Preferably, the top surface of base is equipped with the spacing post more than two, the location apron is equipped with spacing hole on corresponding the position, the location apron passes through spacing hole and spacing post match and realize the location.

Preferably, the nickel sheets are fixed in a row form, two adjacent nickel sheets are connected by using ribs, and the positions of the row nickel sheets correspond to the positions of the nickel sheet placing grooves one by one.

Preferably, a placing frame groove is formed in the battery cell limiting assembly, the shape and size of the placing frame groove correspond to the outer size of the gang nickel sheet, and the placing frame groove is used for limiting the gang nickel sheet.

Preferably, the top surface of the rib is provided with more than two positioning pins, the positioning cover plate is provided with positioning holes in a penetrating manner at corresponding positions, and when the positioning cover plate is placed on the nickel sheet and the rib, the positioning holes are sleeved with the positioning pins.

Preferably, the top surface of the battery cell limiting assembly is equal to the top surface of the base in height.

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

the utility model provides a positioning fixture for laser welding of lithium battery cores, which ensures that the positions of welding points are uniform by fixedly arranging welding through holes on the top surface of each battery core, and positions nickel sheets to be welded by arranging pressing claws on the edges of the welding through holes, thereby enhancing the accuracy of welding positions and promoting the consistency of welding effects.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a base in the present embodiment;

fig. 2 is a schematic structural diagram of the cell limiting assembly in this embodiment;

fig. 3 is an assembly schematic diagram of the base and the cell limiting assembly in this embodiment;

FIG. 4 is a schematic structural diagram of a cover plate according to the present embodiment;

fig. 5 is an assembly diagram of the base, the cell limiting assembly, and the cover plate according to the embodiment;

fig. 6 is a schematic diagram illustrating welding between a battery cell and a nickel plate in this embodiment;

in the figure, 1-base; 2-a cell limiting assembly; 21-cell placing grooves; 22-nickel sheet placing groove; 23-placing a frame groove; 3, positioning a cover plate; 4-electric core; 5-nickel sheet; 6-welding through holes; 7-a limit column; 8-a limiting hole; 9-ribs; 10-a positioning pin; 11-a positioning hole; 12-pressing the claw.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 1 to 4, the embodiment provides a lithium battery welding fixture, which includes a base 1, a battery cell limiting assembly 2, and a positioning cover plate 3, where the battery cell limiting assembly 2 is embedded in the base 1, the battery cell limiting assembly 2 is used to place a battery cell 4 and a nickel plate 5, one end of the nickel plate 5 needs to be placed on the top of the battery cell 4, the positioning cover plate 3 is placed on the battery cell limiting assembly 2, a welding through hole 6 aligned with the top surface of the battery cell 4 is formed in the positioning cover plate 3, and a welding pin is used to weld the top surface of the battery cell 4 through the welding through hole 6, so that the battery cell 4 and the nickel plate 5 are welded together.

Referring to fig. 2, specifically, the cell limiting assembly 2 is provided with a plurality of vertical cell placing grooves 21, the cell placing grooves 21 are distributed side by side, each cell placing groove 21 is used for placing one cell 4, one side of each cell placing groove 21 is provided with a nickel sheet placing groove 22, one end of a nickel sheet 5 is placed in the nickel sheet placing groove 22, and the other end extends outwards and is placed on the top surface of the cell 4. In the middle, the depth of the cell placing groove 21 is close to the total length of the cell 4 to place the cell 4 in shaking, the depth of the nickel sheet placing groove 22 is close to the thickness of the nickel sheet 5, and the depth of the nickel sheet placing groove 22 should be set such that, when one end of the nickel sheet 5 is placed therein, the other end of the nickel sheet 5 can extend to the top surface of the cell 4 without being blocked by the groove edge.

In certain embodiments, the nickel sheet placing groove 22 and the cell placing groove 21 partially intersect, that is, communication is realized between two groove bodies, and the nickel sheet 5 extends to the top surface of the cell 4 along the extension area.

Referring to fig. 5, when the positioning cover plate 3 is mounted above the cell positioning assembly 2, the welding through hole 6 should be aligned with the top surface of the cell 4, a welding needle is aligned with a welding position through the welding through hole 6, so as to ensure the accuracy of a welding point, and the welding through hole 6 should be smaller than the area of the top surface of the cell 4, so as to prevent poor appearance caused by spreading of a welding liquid.

In order to ensure the position accuracy of the positioning cover plate 3, the welding through hole 6 is aligned to the top surface of the battery cell 4, four limiting columns 7 are uniformly arranged on the top surface of the base 1 along the central line, limiting holes 8 are formed in corresponding positions of the positioning cover plate 3, and when the positioning cover plate 3 is installed, the limiting columns 7 are matched with the limiting holes 8, so that the positions of the positioning cover plate 3 and the welding through hole 6 are limited.

Referring to fig. 3, further, the top surface of the electrical core limiting component 2 is as high as the top surface of the base 1, so as to reduce the emptying of the positioning cover plate 3 and improve the positioning accuracy.

It should be added that most of the lithium battery welding adopts laser welding or resistance welding, and in order to ensure the stability of the clamp structure and prevent the clamp structure from deforming or conducting electricity, the base 1 should be made of an insulating material.

Referring to fig. 6, in an actual processing situation, in order to meet the requirement of mass production and improve the productivity, the nickel sheets 5 are usually arranged in a row, and two adjacent nickel sheets 5 are connected by using the ribs 9, for this reason, the nickel sheet placing grooves 22 are also arranged in a row, the positions of the nickel sheet placing grooves 22 correspond to the positions of the nickel sheets in the row one by one, so far, the electric cores 4 to be welded and the nickel sheets 5 are both arrayed along the same direction, preferably, equidistantly, and the welding through holes 6 are correspondingly arranged in an array.

Aiming at the arrangement of the gang nickel sheet, a placing frame groove 23 is arranged on the electric core limiting component 2, the shape and the size of the placing frame groove 23 correspond to the outer size of the gang nickel sheet, and the placing frame groove 23 is used for limiting the gang nickel sheet.

In addition, the top surface of the rib 9 is provided with more than two positioning pins 10, the positioning cover plate 3 is provided with positioning holes 11 at corresponding positions in a penetrating manner, and when the positioning cover plate 3 is placed on the nickel sheet 5 and the rib 9, the positioning holes 11 are sleeved with the positioning pins 10. With the structure, the positioning pin 10, the positioning hole 11 and the placing frame groove 23 can completely position the nickel sheets in the row, so that the nickel sheets in the row are prevented from being integrally displaced in the machining process.

Referring to fig. 4, further, a plurality of pressing claws 12 protruding outward are disposed on the positioning cover plate 3, the positions of the pressing claws 12 correspond to the positions of the nickel sheets 5, and the shapes and the sizes of the pressing claws 12 are similar and the number of the pressing claws is equal. When the positioning cover plate 3 covers the nickel sheet 5, each pressing claw 12 abuts against the top surface and the side surface of the nickel sheet 5, so that the nickel sheets 5 are positioned one by one, and the displacement of the single nickel sheet 5 is prevented.

The following operation of the present embodiment is briefly described with reference to the above structure:

to wait to weld electric core 4 and put into electric core standing groove 21, will the spacing subassembly 2 of electric core is embedded in base 1, will wait to weld nickel piece 5 and put into nickel piece standing groove 22 and ensure that another tip of nickel piece 5 is located the top surface of electric core 4, equipment locating cover plate 3, utilize locating cover plate 3 to compress tightly electric core 4 and nickel piece 5, the last clamping jaw 12 butt nickel piece 5 of locating cover plate 3 this moment, welding through-hole 6 on locating cover plate 3 aims at electric core 4 top surface, operating personnel will weld the needle and implement the welding through-hole 6.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the utility model, and these embodiments are still within the scope of the utility model.

Claims

1. The utility model provides a lithium battery welding jig, its characterized in that, includes base, the spacing subassembly of electric core and locating cover plate, the spacing subassembly of electric core scarf joint is in among the base, the spacing subassembly of electric core is used for placing electric core and nickel piece, and the tip of nickel piece is taken and is put at the top of electric core, placed on the spacing subassembly of electric core locating cover plate, be equipped with the welding through-hole of aiming at electric core top surface on the locating cover plate, through passing through the welding needle the welding is implemented to electric core top surface to with electric core and nickel piece welded fastening.

2. The lithium battery welding fixture of claim 1, wherein the welding through hole is smaller than the area of the top surface of the cell.

3. The lithium battery welding fixture of claim 1, wherein the cell limiting assembly is provided with a plurality of side-by-side cell placing grooves, each cell placing groove is used for placing one cell, one side of each cell placing groove is provided with a nickel sheet placing groove, one end of a nickel sheet is placed in the nickel sheet placing groove, and the other end of the nickel sheet extends outwards and is overlapped on the top surface of the cell.

4. The lithium battery welding fixture as claimed in claim 1, wherein the positioning cover plate is provided with pressing claws protruding outwards, the shape and size of the pressing claws are adapted to the shape and size of the nickel sheet, and when the positioning cover plate covers the nickel sheet, the pressing claws are abutted to the top surface and the side surfaces of the nickel sheet, so as to position the nickel sheet.

5. The lithium battery welding fixture as claimed in claim 1, wherein the top surface of the base is provided with two or more limiting posts, the positioning cover plate is provided with limiting holes at corresponding positions, and the positioning cover plate is positioned by matching the limiting holes with the limiting posts.

6. The lithium battery welding fixture as recited in claim 3, wherein the nickel sheets are fixed in a row, two adjacent nickel sheets are connected by ribs, and the positions of the row of nickel sheets are in one-to-one correspondence with the positions of the nickel sheet placement grooves.

7. The lithium battery welding fixture of claim 6, wherein the cell spacing assembly is provided with a placement frame groove, the shape and size of the placement frame groove correspond to the outer size of the gang nickel plate, and the placement frame groove is used for spacing the gang nickel plate.

8. The lithium battery welding fixture as claimed in claim 6, wherein the top surface of the rib is provided with two or more positioning pins, the positioning cover plate is provided with positioning holes at corresponding positions, and when the positioning cover plate is placed on the nickel plate and the rib, the positioning holes are sleeved with the positioning pins.

9. The lithium battery welding fixture of claim 1, wherein a top surface of the cell limiting assembly is flush with a top surface of the base.