CN213318542U

CN213318542U - Roll up core and apron subassembly welding jig

Info

Publication number: CN213318542U
Application number: CN202021191285.9U
Authority: CN
Inventors: 刘子文; 曾冬冬; 王�锋; 何巍
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2021-06-01
Anticipated expiration: 2030-06-23

Abstract

The utility model discloses a welding fixture for a roll core and a cover plate component, which comprises a first clamping block, a second clamping block, a first pressing piece and a second pressing piece, wherein the first pressing piece is arranged on the first clamping block, the second pressing piece is arranged on the second clamping block, the roll core comprises a roll core body, a plurality of positive lugs and a plurality of negative lugs, the positive lugs and the negative lugs are convexly arranged on the surface of the roll core body, after the first clamping block and the second clamping block are connected, the roll core and the cover plate component can be fixed between the first clamping block and the second clamping block, and a plurality of anodal ears and a plurality of negative pole ear can be pressed tightly the piece by first and the second and last the pressfitting, make a plurality of anodal ears and a plurality of negative pole ear overlap by the department that compresses tightly, avoided carrying out the prewelding work to a plurality of anodal ears and a plurality of negative pole ear, the apron subassembly can directly weld with a plurality of anodal ears and a plurality of negative pole ear in the department that overlaps, has improved the production efficiency of battery.

Description

Roll up core and apron subassembly welding jig

Technical Field

The utility model relates to a battery technology field especially relates to a roll up core and apron subassembly welding jig.

Background

The core components of the lithium battery are a shell, a top cover assembly, a roll core, electrolyte, an inner protection film, a support and the like, for the lithium battery applied to a high-rate scene, the connection mode method among the components inside the battery becomes very important, most of the components inside the lithium battery are connected in a welding mode, and the welding effect directly influences the ohmic impedance of the battery, so that the rate performance of the battery is influenced, and the actual application effect of the battery is finally influenced. The most important welding in the battery is ultrasonic welding of the winding core and the cover plate, and the power output of the battery is directly influenced. Traditional roll up core and apron ultrasonic bonding adopts prewelding earlier for homopolar utmost point ear can link together earlier, adopts formal welding to roll up core and apron again, makes the connecting piece of apron and utmost point ear welded connection together, and production efficiency is lower.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a roll up core and apron subassembly welding jig, when will be in the same place homopolar utmost point ear pressfitting, fix a position roll core and apron simultaneously, avoid traditional ultrasonic welding to need carry out solitary prewelding to homopolar utmost point ear earlier, roll up the welded step of core and apron again, show the production efficiency who improves the battery.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a roll core and apron subassembly welding jig, the roll core includes roll core body, a plurality of positive ear and a plurality of negative pole ear, positive ear and the protruding establishment of negative pole ear is in roll core body surface, roll core and apron subassembly welding jig includes first clamp splice, second clamp splice, first clamp splice and second clamp splice, first clamp splice sets up on the first clamp splice, the second clamp splice sets up on the second clamp splice, first clamp splice with the second clamp splice can set up relatively, form between first clamp splice and the second clamp splice and hold the chamber, roll core and apron subassembly can be fixed in hold the intracavity, and a plurality of positive ear and a plurality of negative pole ear can be pressed by first clamp splice with the second clamp splice, make a plurality of positive ear and a plurality of negative pole ear overlap in the department that is compressed tightly, the cover plate assembly is welded with the plurality of positive lugs and the plurality of negative lugs at the compressed positions.

As an optimized scheme of the utility model, first compressing tightly the piece and being in fixed position on the first clamp splice is adjustable, the second compresses tightly the piece and is in fixed position on the second clamp splice is adjustable, makes first compressing tightly with interval between the second compresses tightly is adjustable.

As a preferred scheme of the utility model, first clamping piece with the quantity that the second compressed tightly the piece is two, anodal ear with the negative pole ear sets up respectively roll up the both ends of core body.

As a preferred scheme of the utility model, first compress tightly the piece with the second compresses tightly the piece and all is the slice, first compress tightly the piece with the second compresses tightly the thickness of piece and is less than positive ear reaches negative pole ear protrusion in roll up the height on core body surface.

As a preferred scheme of the present invention, the first clamping block and the second clamping block are respectively provided with a positioning column and a positioning hole, and when the first clamping block is connected with the second clamping block, the positioning column is inserted into the positioning hole;

or, the first clamping block and the second clamping block are both provided with positioning columns and positioning holes, when the first clamping block is connected with the second clamping block, the positioning columns on the first clamping block are inserted into the positioning holes on the second clamping block, and the positioning columns on the second clamping block are inserted into the positioning holes on the first clamping block.

As a preferred scheme of the utility model, the apron subassembly includes top cap, two utmost point posts and two connecting pieces, utmost point post sets up on the top cap, the one end of connecting piece with utmost point post is connected, the other end and a plurality of connecting piece anodal ear or a plurality of the negative pole ear is connected, it has at least one opening to hold the chamber, connecting piece, a plurality of anodal ear and a plurality of the negative pole ear part at least extends to outside the opening.

As a preferred scheme of the utility model, it rolls up the core to roll up the core for full utmost point ear, first clamp splice with the second clamp splice all is the U type, it has two openings of relative setting, a plurality of to hold the chamber anodal ear is located one side opening, and is a plurality of the negative pole ear is located another side opening.

As an optimized scheme of the utility model, be provided with first stair structure on the first clamp splice, be provided with second stair structure on the second clamp splice, work as first clamp splice with the back is connected to the second clamp splice, one side edge of top cap erects on the first stair structure, the opposite side edge that the top cap is relative erects on the second stair structure.

As a preferred embodiment of the present invention, the positive electrode tab and the negative electrode tab overlap at the middle portion thereof.

As an optimized scheme of the utility model, first clamp splice with the connection can be dismantled to the second clamp splice.

The utility model has the advantages that:

the utility model discloses a roll up core and apron subassembly welding jig fixes roll core and apron subassembly through first clamp splice and second clamp splice, first compress tightly piece and second compress tightly the piece then can be simultaneously with a plurality of anodal ears and a plurality of negative pole ear pressfitting, make a plurality of anodal ears overlap together by compressing tightly, a plurality of negative pole ears also overlap together by compressing tightly, consequently, avoided earlier carrying out solitary pre-weld work to a plurality of anodal ears and a plurality of negative pole ear, the apron subassembly can directly weld in overlapping with a plurality of anodal ears and a plurality of negative pole ear, the production efficiency of battery has been improved.

Drawings

Fig. 1 is a schematic perspective view of a welding jig for a roll core and a cover plate assembly according to an embodiment of the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a front view of FIG. 1;

FIG. 4 is an enlarged view taken at A in FIG. 3;

fig. 5 is a side view of fig. 1.

In the figure:

1. a first clamping block; 2. a second clamp block; 3. a first pressing member; 4. a second pressing member; 100. a winding core; 110. a roll core body; 120. a positive tab; 130. a negative tab; 200. a cover plate assembly; 210. a top cover; 220. a pole column; 230. a connecting member; 300. a threaded hole; 400. a long round hole; 500. a positioning column; 600. and (7) positioning the holes.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the word "over" a first feature or feature in a second feature may include the word "over" or "over" the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under" a second feature may include a first feature that is directly under and obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

As shown in fig. 1, 2 and 5, the welding jig for a winding core and a cover plate assembly of the present embodiment includes a first clamping block 1, a second clamping block 2, a first pressing member 3 and a second pressing member 4, the first pressing member 3 is disposed on the first clamping block 1, the second pressing member 4 is disposed on the second clamping block 2, the first pressing member 3 and the second pressing member 4 are disposed opposite to each other, preferably, the first clamping block 1 and the second clamping block 2 are detachably connected to facilitate the winding core 100 and the cover plate assembly 200 to be placed in, the winding core 100 includes a winding core body 110, a plurality of positive tabs 120 and a plurality of negative tabs 130, the positive tabs 120 and the negative tabs 130 are protruded on the surface of the winding core body 110, after the first clamping block 1 and the second clamping block 2 are connected, the winding core 100 and the cover plate assembly 200 can be fixed in a containing cavity formed between the first clamping block 1 and the second clamping block 2, and the plurality of positive tabs 120 and the negative tabs 130 can be continuously pressed by the first pressing member 3 and the second pressing member 4, the positive tabs 120 and the negative tabs 130 are overlapped at the compressed positions, and the cover plate assembly 200 is welded to the positive tabs 120 and the negative tabs 130 at the compressed positions.

The book core of this embodiment is fixed 100 and apron subassembly 200 with apron subassembly welding jig through first clamp splice 1 and second clamp splice 2 to rolling up core, first 3 and the second of pressing tightly compresses tightly and then can compress tightly a plurality of anodal ears 120 and a plurality of negative pole ear 130 pressfitting simultaneously, make a plurality of anodal ears 120 overlap together in the department that is compressed tightly, a plurality of negative pole ears 130 also overlap together in the department that is compressed tightly, consequently, avoided earlier carrying out solitary pre-welding work to a plurality of anodal ears 120 and a plurality of negative pole ear 130, apron subassembly 200 can directly weld in the department that overlaps with a plurality of anodal ears 120 and a plurality of negative pole ear 130, the production efficiency of battery has been improved.

Preferably, the fixed position of the first pressing piece 3 on the first clamping block 1 is adjustable, the fixed position of the second pressing piece 4 on the second clamping block 2 is adjustable, and the distance between the first pressing piece 3 and the second pressing piece 4 is adjustable, so that the distance between the first pressing piece 3 and the second pressing piece 4 can be adjusted according to the actual specification of the winding core 100, a plurality of positive lugs 120 and a plurality of negative lugs 130 at the pressing part can be made to have proper thickness, the situation that the connection between the lugs is poor or the pressure between the lugs is overlarge is avoided, and the connection quality of the cover plate assembly 200 and the winding core 100 is improved. The positive tab 120 and the negative tab 130 of the winding core 100 of the present embodiment are respectively disposed at two ends of the winding core body 110, and therefore, the number of the first pressing members 3 and the number of the second pressing members 4 are both two.

As shown in fig. 2 and 3, specifically, threaded holes 300 are respectively formed in the first clamping block 1 and the second clamping block 2, at least one oblong hole 400 is respectively formed in the first pressing member 3 and the second pressing member 4, and the first pressing member 3 and the second pressing member 4 are fixed by fasteners (not shown in the drawings) which pass through the oblong holes 400 and are screwed into the threaded holes 300. The first pressing piece 3 and the second pressing piece 4 can move to a certain degree along the direction in which the oblong hole 400 is formed, so that the distance between the first pressing piece 3 and the second pressing piece 4 is adjusted. In this embodiment, two oblong holes 400 are formed in the first pressing member 3 and the second pressing member 4, and the two oblong holes 400 are parallel to each other, which is beneficial to improving the stability of the first pressing member 3 and the second pressing member 4 during movement, and ensures that the end surfaces of the first pressing member 3 and the second pressing member 4 are in good contact with the positive tab 120 and the negative tab 130.

Further, the first pressing piece 3 and the second pressing piece 4 are both in a sheet shape, and the thickness of the first pressing piece 3 and the second pressing piece 4 is smaller than the height of the positive tab 120 and the negative tab 130 protruding out of the surface of the winding core body 110. Since both the positive tab 120 and the negative tab 130 need to be welded to the cover plate assembly 200, when the first pressing member 3 and the second pressing member 4 contact the positive tab 120 and the negative tab 130, a sufficient area needs to be left at the pressed positions of the positive tab 120 and the negative tab 130 for welding the cover plate assembly 200, so that the thicknesses of the first pressing member 3 and the second pressing member 4 need to be properly controlled. Of course, the first pressing member 3 and the second pressing member 4 cannot be so thin as to be easily deformed, so that sufficient pressure cannot be provided to tightly attach the positive electrode tabs 120 and the negative electrode tabs 130 to each other at the pressed positions.

Preferably, the first clamping block 1 and the second clamping block 2 are respectively provided with a positioning column 500 and a positioning hole 600, and when the first clamping block 1 is connected with the second clamping block 2, the positioning column 500 is inserted into the positioning hole 600;

or, as shown in fig. 2, the first clamping block 1 and the second clamping block 2 are both provided with a positioning column 500 and a positioning hole 600, when the first clamping block 1 is connected with the second clamping block 2, the positioning column 500 on the first clamping block 1 is inserted into the positioning hole 600 on the second clamping block 2, and the positioning column 500 on the second clamping block 2 is inserted into the positioning hole 600 on the first clamping block 1. Thereby facilitating the connection of the first clamping block 1 and the second clamping block 2 and having good fixing effect on the winding core 100 and the cover plate assembly 200.

As shown in fig. 2, preferably, the cover plate assembly 200 includes a top cover 210, two terminal posts 220 and two connecting members 230, the terminal posts 220 are disposed on the top cover 210, one end of the connecting member 230 is connected to the terminal posts 220, the other end of the connecting member 230 is connected to the plurality of positive electrode tabs 120 or the plurality of negative electrode tabs 130, after the first clamping block 1 is connected to the second clamping block 2, an accommodating cavity with an opening is formed between the first clamping block 1 and the second clamping block 2, the accommodating cavity is used for accommodating the winding core 100 and the cover plate assembly 200, and the connecting member 230, the plurality of positive electrode tabs 120 and the plurality of negative electrode tabs 130 at least partially extend out of the opening, so as to provide more operating space for welding the connecting member 230 to the plurality of positive electrode tabs 120 and welding the connecting member 230 to the plurality of negative electrode tabs 130.

In one specific embodiment, the winding core 100 is a full tab winding core, and the receiving cavity has two oppositely disposed openings, with the positive tabs 120 on one side and the negative tabs 130 on the other side. Correspondingly, the first clamping block 1 of the embodiment is provided with two first pressing pieces 3 which are respectively positioned at two side openings, and the second clamping block 2 is provided with two second pressing pieces 4 which are respectively positioned at two side openings.

In other embodiments, the winding core 100 is not a full-tab winding core, but a conventional multi-tab winding core, the plurality of positive tabs 120 and the plurality of negative tabs 130 of the winding core 100 are both located on the same side of the winding core body 110, and accordingly, all of the first pressing members 3 and the second pressing members 4 are disposed on the same side, and accordingly, the accommodating cavity has only one opening.

As shown in fig. 3 and 4, further, a first step structure is disposed on the first clamping block 1, and a second step structure is disposed on the second clamping block 2, when the first clamping block 1 and the second clamping block 2 are connected, one side edge of the top cover 210 is erected on the first step structure, and the other side edge of the top cover 210 opposite to the top cover is erected on the second step structure, so as to fix the cover plate assembly 200 well.

Preferably, the positive electrode tabs 120 and the negative electrode tabs 130 are overlapped at the middle part, such an arrangement causes the battery to have a small internal resistance and a strong overcurrent capability, and if the connecting member 230 is connected to the end part of the positive electrode tab 120 or the negative electrode tab 130, the internal resistance is large, and heat generated inside the battery is large.

In addition, the positive electrode tabs 120 and the negative electrode tabs 130 are overlapped in the middle of the positive electrode tabs 120 and the negative electrode tabs 130, the two ends of the positive electrode tabs 120 and the two ends of the negative electrode tabs 130 are not overlapped together, a large gap is formed, after electrolyte is injected, the electrolyte can have enough channels to enter the winding core 100, the high-temperature standing time after the electrolyte is injected can be shortened, and the production efficiency is improved.

Preferably, the first clamping block 1, the second clamping block 2, the first pressing member 3 and the second pressing member 4 are all made of insulating materials, so that short circuit is prevented in the welding process of the winding core 100 and the cover plate assembly 200.

As a preferred embodiment of the present invention, in the description of the present specification, reference to the description of the terms "preferred", "further" or the like means that a particular feature, structure, material, or characteristic described in connection with the example or illustration is included in at least one example or illustration of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above embodiments are only used to illustrate the detailed embodiments of the present invention, and the present invention is not limited to the above detailed embodiments, i.e. the present invention must not be implemented depending on the detailed embodiments. It should be clear to those skilled in the art that any improvement of the present invention, to the equivalent replacement of each raw material of the present invention, the addition of auxiliary components, the selection of specific modes, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. A welding fixture for a roll core and an cover plate assembly is disclosed, the roll core comprises a roll core body, a plurality of positive lugs and a plurality of negative lugs, the positive lugs and the negative lugs are convexly arranged on the surface of the roll core body, and the welding fixture for the roll core and the cover plate assembly is characterized in that the welding fixture for the roll core and the cover plate assembly comprises a first clamping block, a second clamping block, a first pressing piece and a second pressing piece, the first pressing piece is arranged on the first clamping block, the second pressing piece is arranged on the second clamping block, the first pressing piece and the second pressing piece can be oppositely arranged, an accommodating cavity is formed between the first clamping block and the second clamping block, the roll core and the cover plate assembly can be fixed in the accommodating cavity, and the positive lugs and the negative lugs can be pressed by the first pressing piece and the second pressing piece, so that the positive lugs and the negative lugs are overlapped at the pressed positions, the cover plate assembly is welded with the plurality of positive lugs and the plurality of negative lugs at the compressed positions.

2. The core and cover plate assembly welding fixture of claim 1, wherein the first pressing member has an adjustable securing position on the first clamping block and the second pressing member has an adjustable securing position on the second clamping block, such that the distance between the first pressing member and the second pressing member is adjustable.

3. The welding fixture for the winding core and the cover plate assembly according to claim 1, wherein the number of the first pressing pieces and the number of the second pressing pieces are two, and the positive tab and the negative tab are respectively arranged at two ends of the winding core body.

4. The welding fixture for the winding core and the cover plate assembly according to claim 1, wherein the first pressing piece and the second pressing piece are both in a sheet shape, and the thickness of the first pressing piece and the thickness of the second pressing piece are smaller than the height of the positive tab and the negative tab protruding out of the surface of the winding core body.

5. The welding fixture for the roll core and the cover plate assembly as claimed in claim 1, wherein the first clamping block and the second clamping block are respectively provided with a positioning column and a positioning hole, and when the first clamping block is connected with the second clamping block, the positioning column is inserted into the positioning hole;

6. The welding fixture for the winding core and the cover plate assembly according to claim 1, wherein the cover plate assembly comprises a top cover, two poles and two connecting pieces, the poles are arranged on the top cover, one end of each connecting piece is connected with the poles, the other end of each connecting piece is connected with a plurality of positive lugs or a plurality of negative lugs, the accommodating cavity is provided with at least one opening, and the connecting pieces, the positive lugs and the negative lugs at least partially extend out of the openings.

7. The welding fixture for the roll core and the cover plate assembly as claimed in claim 6, wherein the roll core is a full-tab roll core, the first clamping block and the second clamping block are both U-shaped, the accommodating cavity has two oppositely arranged openings, a plurality of the positive tabs are located at one side of the accommodating cavity, and a plurality of the negative tabs are located at the other side of the accommodating cavity.

8. The welding fixture for the roll core and the cover plate assembly as claimed in claim 6, wherein the first clamping block is provided with a first step structure, the second clamping block is provided with a second step structure, when the first clamping block and the second clamping block are connected, one side edge of the top cover is erected on the first step structure, and the other opposite side edge of the top cover is erected on the second step structure.

9. The welding fixture for the winding core and the cover plate assembly as claimed in claim 1, wherein a plurality of the positive electrode tabs and a plurality of the negative electrode tabs are overlapped together at the middle portions thereof.

10. The core and cover plate assembly weld fixture of claim 1, wherein the first clamp block is removably coupled to the second clamp block.