CN219684416U

CN219684416U - Welding fixture for battery cell tab

Info

Publication number: CN219684416U
Application number: CN202320825261.1U
Authority: CN
Inventors: 余隆宇
Original assignee: Cornex New Energy Co ltd
Current assignee: Cornex New Energy Co ltd
Priority date: 2023-04-12
Filing date: 2023-04-12
Publication date: 2023-09-15
Anticipated expiration: 2033-04-12

Abstract

The utility model provides a welding fixture for a battery cell tab, which comprises: the first positioning component comprises a mounting plate, a first positioning piece and a lug pressing device, wherein the mounting plate is used for placing the core pack, the first positioning piece is used for positioning the core pack in the horizontal direction, and the lug pressing device is detachably arranged at one end of the mounting plate in the length direction and is used for pressing lugs at one end of the core pack; the second positioning component is positioned on one side of the width direction of the mounting plate and comprises a pushing device and a second positioning piece, the second positioning piece is used for enabling the lug on the core pack to be positioned at a first welding position, and the pushing device is used for enabling the lug on the core pack to be positioned at other welding positions. The tab welding fixture is simple to operate, and after one-time positioning, all welding marks of the tab at the same end on the core package in the same batch can be welded without adjusting, so that the welding efficiency is improved, and meanwhile, the consistency of the core package welding marks is improved.

Description

Welding fixture for battery cell tab

Technical Field

The utility model relates to the technical field of battery preparation, in particular to a welding fixture for battery cell lugs.

Background

In the manufacturing process of the battery cell, the laminated core package is usually required to be welded with the electrode lugs, namely, the electrode lugs on the plurality of pole pieces which are arranged in a laminated mode are subjected to ultrasonic pre-welding, so that the electrode lugs are connected together, and the subsequent welding with the battery connecting piece is facilitated.

Along with the higher and higher performance requirements of new energy automobile markets on power batteries, the current batteries have to be improved to meet the overcurrent requirements of the internal structures of the batteries, and the improvement of the overcurrent capacity is an important mode by increasing the welding area of ultrasonic welding of the electrode lugs. However, the welding area of the tab is increased to exceed the welding range of the existing welding head, and for the situation, only the number of welding marks can be increased, namely, the number of welding times is increased to meet the requirement.

However, in the process of manufacturing the battery core test, most of the used welding fixtures can only meet single-time welding, for example, patent publication No. CN218284242U discloses a welding fixture which is used for welding a plurality of welding marks, because of the limitation of a welding head station, the position of the fixture is required to be adjusted when the welding position is replaced, and in order to ensure the accurate welding position of the batch of core packages, only the first welding mark of the batch of core packages can be welded, and then the second welding mark is welded; thus, materials are accumulated, the subsequent working procedures can not be produced completely, and the production progress is seriously affected. If the clamp is adjusted midway, the problem of inconsistent welding and printing is caused, and the consistency of welding and printing is difficult to ensure because the error of manually adjusting the clamp is large.

Disclosure of Invention

In view of this, the utility model provides a welding fixture for electrode lugs of an electric core, which realizes the welding of a plurality of welding marks of a single core package on the premise of ensuring the consistency of the welding marks of batches.

The technical scheme of the utility model is realized as follows:

the utility model provides a welding fixture for a battery cell tab, which comprises:

a bottom plate;

the first positioning component comprises a mounting plate, a first positioning piece and a lug pressing device, wherein the first positioning piece and the lug pressing device are arranged on the mounting plate, the mounting plate is horizontally arranged on the bottom plate and used for placing the core package, the first positioning piece is provided with a plurality of first positioning pieces and used for positioning the core package in the horizontal direction, and the lug pressing device is detachably arranged at one end of the length direction of the mounting plate and used for pressing lugs at one end of the core package;

the second locating component is arranged on the bottom plate and is located on one side of the width direction of the mounting plate, the second locating component comprises a pushing device and a second locating piece, the second locating piece is used for limiting the first locating component to the position of the bottom plate along the width direction of the mounting plate so that the lug on the core pack is located at a first welding position, and the pushing device is used for driving the first locating component to translate along the width direction of the mounting plate and far away from the second locating piece so that the lug on the core pack is located at other welding positions.

On the basis of the technical scheme, preferably, the top surface of the mounting plate is provided with a first area for placing the core pack, the first positioning pieces are positioned on two sides of the width direction of the first area and one end of the length direction of the first area, which is far away from the pole lug pressing device, the top surface of the mounting plate is provided with a sliding groove for mounting the first positioning pieces, and the first positioning pieces can be adjusted in the position in the sliding groove.

On the basis of the technical scheme, preferably, one end of the mounting plate in the length direction is provided with a second area for placing the tab, the tab pressing device comprises a pressing plate and positioning plates positioned at two ends of the length direction of the pressing plate, the pressing plate is sunken downwards relative to the two positioning plates, positioning seats are respectively arranged on the top surfaces of the mounting plates at two sides of the length direction of the second area, the pressing plate is horizontally positioned between the two positioning seats and used for pressing and folding the tab in the second area, and the positioning plates are horizontally positioned on the top surfaces of the positioning seats.

Further, preferably, the first magnetic pieces are arranged on the surfaces, which are contacted with the positioning plate, of the positioning seat.

Further, preferably, a first welding through hole penetrating through the mounting plate is formed in the second area along the width direction of the mounting plate, a corresponding avoiding hole of the first welding through hole is formed in the bottom plate, and a second welding through hole corresponding to the first welding through hole is formed in the pressing plate.

On the basis of the technical scheme, preferably, the second positioning pieces are symmetrically arranged relative to the pushing device, the second positioning pieces comprise positioning rods and second magnetic pieces, the positioning rods are arranged on the bottom plate, the length directions of the positioning rods are perpendicular to the length directions of the mounting plates, the positions of the positioning rods on the bottom plate can be adjusted relative to the mounting plates, the second magnetic pieces are fixedly arranged at one ends of the positioning rods, facing the mounting plates, of the second magnetic pieces, and the second magnetic pieces are used for adsorbing side walls of the width directions of the mounting plates.

Further, preferably, the pushing device comprises a quick clamp and a fixing plate, the fixing end of the quick clamp is fixedly arranged on the fixing plate, the telescopic end of the quick clamp is fixedly connected with the mounting plate, the direction of the telescopic end of the quick clamp is perpendicular to the length direction of the mounting plate, the fixing plate is horizontally arranged on the bottom plate, and the fixing plate can adjust the position of the fixing plate on the bottom plate relative to the mounting plate.

On the basis of the technical scheme, the positioning device further comprises third positioning pieces fixedly arranged on the bottom plate, the two third positioning pieces are arranged and are respectively located at two ends of the length direction of the mounting plate, the length direction of the third positioning pieces is flush with the width direction of the mounting plate, positioning balls are arranged on one face, facing the mounting plate, of each third positioning piece, and a plurality of positioning pits used for being connected with the positioning balls are formed in the surface of the mounting plate along the interval of the width direction of each positioning piece.

Further, preferably, the second positioning member is horizontally disposed on the fixing plate, and the length direction of the second positioning member is perpendicular to the length direction of the fixing plate, and the position of the second positioning member on the fixing plate can be adjusted relative to the mounting plate.

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

(1) According to the battery core lug welding fixture disclosed by the utility model, the plurality of first positioning pieces are arranged on the mounting plate, the core package placed on the mounting plate can be horizontally positioned, the lug pressing device is arranged at one end of the length direction of the mounting plate, one end of the core package can be pressed, ultrasonic welding is convenient, the first positioning pieces are enabled to translate towards the second positioning pieces on the bottom plate by arranging the spacing between the second positioning pieces on the bottom plate and the mounting plate, when the position of the mounting plate is limited by the second positioning pieces, the lug on the core package can be positioned at the first strip welding position, after the first strip welding on the lug is finished, the first positioning pieces are driven to be away from the second positioning pieces by the pushing device, the lug on the core package can be positioned at the second strip welding position, the welding operation of the second strip welding on the lug is finished, the first positioning pieces are driven to translate by the pushing device continuously, the lug on the core package can be positioned at more welding positions, and therefore the sequential welding of a plurality of strips on the lug can be finished. The tab welding fixture is simple to operate, and after one-time positioning, all the welding marks of the tab at the same end on one core bag can be welded without adjustment, so that the production efficiency of the multi-welding battery is improved, and the research and development period of new products is greatly shortened; in addition, after the welding fixture is positioned for one time, all the core packages in batch can be subjected to tab welding, so that the consistency of core package welding and printing is improved, and the consistency of cell production is further enhanced;

(2) The first locating pieces are arranged at two sides of the width direction of the first area and one end of the length direction of the first area, far away from the pole lug pressing device, the top surface of the mounting plate is provided with the sliding groove, and the core bags with different sizes can be horizontally located by adjusting the positions of the first locating pieces in the sliding groove, so that the universality is stronger;

(3) The top surfaces of the mounting plates on the two sides of the length direction of the second area are respectively provided with a positioning seat, so that the pressing plate can be embedded between the two positioning seats, the pole lug pressing device is prevented from translating relative to the width direction of the mounting plate, the first magnetic pieces which are mutually adsorbed are arranged on the surfaces, which are contacted with the positioning plate, of the positioning seats, the positioning plate and the positioning seats can be adsorbed up and down through magnetic force, the pressing plate can press the pole lug in the second area, the pole lug pressing device can be prevented from translating relative to the length direction of the mounting plate, and the gathering and pressing effect of the pole lug pressing device on the pole lug is improved;

(4) The positioning rod can adjust the position of the positioning rod on the bottom plate relative to the mounting plate, so that the first welding positions on different core packages can be adjusted, and the adaptability is stronger;

(5) Through setting up the second magnetic part in locating lever length direction one end, when first locating component translates towards locating lever direction, make mounting panel and locating lever tip be close to, can adsorb the mounting panel through the second magnetic part, make first locating component carry out light position location on the bottom plate, guarantee that the tab on the core package is in first strip welding position;

(6) Through setting up a plurality of locating pits on mounting panel surface along its width direction interval, through making interval between the locating pit and the interval phase-match between the welding seal, can make things convenient for thrust unit when promoting first locating component, come with the locating pit cooperation through the locating ball on the third locating component to realize other welding seal position location except that first welding seal.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic structural view of a welding fixture in a first working state according to the present disclosure;

FIG. 2 is a schematic structural view of a welding fixture according to a second working state of the present disclosure;

FIG. 3 is an exploded view of a welding fixture of the present disclosure;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

reference numerals:

1. a bottom plate; 2. a first positioning assembly; 21. a mounting plate; 22. a first positioning member; s, core package; s1, a tab; 23. a pole lug pressing device; 3. a second positioning assembly; 31. a pushing device; 32. a second positioning member; 211. a first region; 212. a chute; 213. a second region; 231. a pressing plate; 232. a positioning plate; 214. a positioning seat; 2321. a first magnetic member; 215. a first welding through hole; 11. avoidance holes; 2311. a second welding through hole; 321. a positioning rod; 322. a second magnetic member; 311. a quick clamp; 312. a fixing plate; 4. a third positioning member; 41. positioning the ball; 216. positioning the pit; p1, first strip welding; and P2, second welding.

Detailed Description

The following description of the embodiments of the present utility model will clearly and fully describe the technical aspects of the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, are intended to fall within the scope of the present utility model.

As shown in fig. 1, in combination with fig. 2-4, the utility model discloses a welding fixture for a battery cell tab S1, which is used for realizing multi-welding of the tab S1 on a core pack S through the welding fixture in the process of manufacturing a battery cell test.

The welding fixture of the embodiment comprises a bottom plate 1, a first positioning component 2 and a second positioning component 3.

The bottom plate 1 is used as a mounting platform for mounting the first positioning assembly 2 and the second positioning assembly 3, and meanwhile, the whole welding fixture is mounted on the ultrasonic welding equipment through the bottom plate 1.

The first positioning component 2 is used for positioning the core pack S, and is also used for pressing the tab S1, so that the tab S1 is conveniently welded by the ultrasonic welding head. The first positioning assembly 2 of the present embodiment includes a mounting plate 21, a first positioning member 22 and a tab pressing device 23 disposed on the mounting plate 21, where the mounting plate 21 is horizontally disposed on the bottom plate 1 for placing the core pack S. In this embodiment, the core pack S is a laminated type, the core pack S is disposed on the top surface of the mounting plate 21 in a lying manner, and the first positioning members 22 are provided in plurality for positioning the core pack S in the horizontal direction.

The tab pressing device 23 is detachably disposed at one end of the mounting plate 21 in the length direction and is used for pressing the tab S1 at one end of the core pack S, specifically, after the core pack S is positioned on the mounting plate 21 by the plurality of first positioning members 22, the plurality of pole pieces on the core pack S are aligned with each other, and meanwhile, the tabs S1 at two ends of the core pack S are also aligned with each other, and the tabs S1 on the core pack S are respectively located at two ends of the mounting plate 21 in the length direction. Because the welding operation of the tab S1 of the core pack S is trial production, and the welding heads for welding the positive tab and the negative tab are at different stations or different welding devices, the welding fixture of the embodiment only performs a plurality of welding marks on the tab S1 at one end of the core pack S, and the tab S1 at the other end of the core pack S can be completed on other welding devices by the welding fixture of the embodiment. Therefore, after the core pack S is positioned, the tab pressing device 23 may be placed at one end of the mounting plate 21 in the length direction, so as to press the tab S1 to be welded.

In the case of welding the tab S1, generally, the welding is performed along the length direction of the tab S1, so that a bar-shaped weld mark is formed on the tab S1, and the size of the ultrasonic horn is fixed, so that the area formed by the plurality of weld marks cannot be covered, and therefore, the welding of the plurality of weld marks along the length direction of the tab S1 is required, and the tab S1 needs to be translated along the length direction thereof, so that the ultrasonic horn corresponds to each weld mark position, and the welding operation is performed.

In order to realize the welding of a plurality of welding marks on the tab S1, in this embodiment, the bottom plate 1 on one side of the width direction of the mounting plate 21 is provided with the second positioning component 3, the second positioning component 3 includes a pushing device 31 and a second positioning component 32, the second positioning component 32 is used for limiting the position of the first positioning component 2 on the bottom plate 1 along the width direction of the mounting plate 21 so that the tab S1 on the core pack S is located at the first welding mark P1, and the pushing device 31 is used for driving the first positioning component 2 to translate along the width direction of the mounting plate 21 and far away from the second positioning component 32 so that the tab S1 on the core pack S is located at other welding mark positions far away from the first welding mark P1.

In a specific operation, by setting the distance between the second positioning member 32 on the base plate 1 and the mounting plate 21, the first positioning member 2 is translated on the base plate 1 toward the second positioning member 32, and the second positioning member 32 is used for positioning the mounting plate 21, the tab S1 on the core pack S can be positioned at the first welding P1. It should be noted that, in the initial state, after the welding fixture of the present embodiment is fixed on the welding device, the first positioning component 2 is translated, so that the ultrasonic welding head is aligned to the position of the first strip welding mark P1 on the tab S1, then the second positioning component 32 is close to one side of the width direction of the mounting plate 21, which is far away from the first strip welding mark P1, and the second positioning component 32 is fixed on the bottom plate 1, at this time, the position of the first strip welding mark P1 of the tab S1 can be positioned on the whole fixture, so that the ultrasonic welding head is convenient for implementing welding.

After the welding of the first welding mark P1 on the tab S1 is completed, the pushing device 31 drives the first positioning component 2 to be far away from the second positioning component 32, so that the tab S1 on the core pack S can be located at the second welding mark P2, the welding operation of the second welding mark P2 on the tab S1 is completed, the pushing device 31 continues to drive the first positioning component 2 to translate, the tab S1 on the core pack S can be located at more welding mark positions, and the welding of a plurality of welding marks on the tab S1 can be sequentially completed. It is noted that the pitch of each pushing of the pushing device 31 may be adjusted to determine the position between the plurality of solder marks.

The tab S1 welding fixture is simple to operate, and after one-time positioning, all welding marks of the tab S1 at the same end on one core pack S can be welded without adjustment, so that the production efficiency of the multi-welding battery is improved, and the research and development period of new products is greatly shortened; in addition, after the welding fixture is positioned once, the electrode lugs S1 can be welded on all the core packages S in batches, so that the consistency of welding and printing of the core packages S is improved, and the consistency of production of the battery cells is further enhanced.

In order to realize that different core packages S share the welding fixture of the present embodiment, the top surface of the mounting plate 21 is provided with a first area 211 for placing the core package S, the first positioning members 22 are located at two sides of the width direction of the first area 211 and one end of the length direction of the first area 211, which is far away from the tab pressing device 23, the top surface of the mounting plate 21 is provided with a chute 212 for mounting the first positioning members 22, and the position of the first positioning members 22 in the chute 212 can be adjusted.

In this embodiment, the first positioning member 22 is a square positioning block, and the thickness of the square positioning block is greater than that of the core pack S, so that the side wall of the core pack S can be abutted by the square positioning block. The first positioning pieces 22 on two sides of the width direction of the first area 211 are used for positioning the width direction of the core pack S, the first positioning pieces 22 on one end, far away from the tab pressing device 23, of the length direction of the first area 211 are used for positioning one end of the core pack S in the length direction, and the purpose of achieving pressing of the tab S1 on the other end through the tab pressing device 23 is achieved through one end positioning.

As some embodiments, a plurality of bolt holes are arranged in the sliding groove 212 along the translation direction of the first positioning piece 22 at intervals, and a strip-shaped hole is formed in the first positioning piece 22, after the position of the first positioning piece 22 in the sliding groove 212 is adjusted, the first positioning piece 22 can pass through the strip-shaped hole through bolts and is connected with corresponding bolt holes, so that the position of the first positioning piece 22 on the mounting plate 21 is fixed, the position of the first positioning piece 22 in the sliding groove 212 is adjusted, the core package S with different sizes can be horizontally positioned, and the universality is stronger.

In order to facilitate the tab pressing device 23 to press the tab S1 to be welded on the core pack S, in this embodiment, a second area 213 for placing the tab S1 is provided at one end of the mounting plate 21 in the length direction, and the area of the second area is larger than that of the tab S1, so that the tab S1 of different core packs S can be welded.

The tab pressing device 23 comprises a pressing plate 231 and positioning plates 232 positioned at two ends of the pressing plate 231 in the length direction, the pressing plate 231 is sunken downwards relative to the two positioning plates 232, positioning seats 214 are respectively arranged on the top surfaces of the mounting plates 21 at two sides of the second area 213 in the length direction, the pressing plate 231 is horizontally positioned between the two positioning seats 214 and used for flattening and folding the tab S1 in the second area 213, and the positioning plates 232 are horizontally positioned on the top surfaces of the positioning seats 214. Therefore, after the tab S1 to be welded on the core pack S is placed in the second area 213, the pressing plate 231 is embedded between the two positioning seats 214, and the positioning plate 232 is located on the top surface of the positioning seats 214, so that the plurality of tabs S1 are pressed by the gravity of the pressing plate 231, and meanwhile, the pressing plate 231 is embedded between the two positioning seats 214, so that the tab pressing device 23 is prevented from translating relative to the width direction of the mounting plate 21.

In order to further improve the compressing effect of the tab S1, in this embodiment, the first magnetic members 2321 that are mutually adsorbed are disposed on the surface of the positioning seat 214 that contacts with the positioning plate 232, so that the positioning plate 232 and the positioning seat 214 can be attracted up and down by magnetic force, thereby compressing the tab S1 in the second area 213 by the pressing plate 231, avoiding the translation of the tab compressing device 23 relative to the length direction of the mounting plate 21, and improving the folding compressing effect of the tab compressing device 23 on the tab S1.

In order to realize that the ultrasonic welding head can weld the two sides of the tab S1 up and down, in this embodiment, a first welding through hole 215 penetrating through the mounting plate 21 is provided on the second area 213 along the width direction of the mounting plate 21, a second welding through hole 2311 corresponding to the first welding through hole 215 is provided on the pressing plate 231, and a relief hole 11 corresponding to the first welding through hole 215 is provided on the bottom plate 1. Therefore, the ultrasonic welding head right above the welding fixture can pass through the second welding through hole 2311 from top to bottom to weld the front surface of the tab S1, and the ultrasonic welding head right below the welding fixture can pass through the avoiding hole 11 and the first welding through hole 215 from bottom to weld the back surface of the tab S1.

In this embodiment, in order to implement the second positioning element 32 to position-limit the first positioning assembly 2, in this embodiment, two second positioning elements 32 are disposed along the length direction of the mounting plate 21, the two second positioning elements 32 are symmetrically disposed relative to the pushing device 31, the second positioning element 32 includes a positioning rod 321 and a second magnetic element 322, the positioning rod 321 is disposed on the bottom plate 1, and the length direction of the positioning rod 321 is perpendicular to the length direction of the mounting plate 21, the positioning rod 321 can adjust the position of the positioning rod 321 on the bottom plate 1 relative to the mounting plate 21, the second magnetic element 322 is fixedly disposed at one end of the positioning rod 321 facing the mounting plate 21, and the second magnetic element 322 is used for adsorbing the side wall of the width direction of the mounting plate 21.

By adopting the technical scheme, the position of the positioning rod 321 on the bottom plate 1 can be adjusted relative to the mounting plate 21, so that the first welding positions on different core bags S can be adjusted, and the suitability is stronger. Through setting up second magnetic part 322 at locating lever 321 length direction one end, when first locating component 2 translates towards locating lever 321 direction, make mounting panel 21 and locating lever 321 tip be close to, adsorb mounting panel 21 through second magnetic part 322, make first locating component 2 carry out light position location on bottom plate 1, guarantee that tab S1 on the core package S is in first welding seal P1 position.

Because the welding fixture of this embodiment belongs to the use in the manufacturing process of the battery cell test, in order to avoid the increase of the cost and not to involve the automation operation, this embodiment shows a preferred implementation of the pushing device 31, including the quick clamp 311 and the fixed plate 312, the fixed end of the quick clamp 311 is fixedly arranged on the fixed plate 312, the telescopic end of the quick clamp 311 is fixedly connected with the mounting plate 21, and the direction of the telescopic end of the quick clamp 311 is vertical to the length direction of the mounting plate 21, the fixed plate 312 is horizontally arranged on the bottom plate 1, and the fixed plate 312 can adjust the position of the fixed plate 312 on the bottom plate 1 relative to the mounting plate 21.

By adopting the technical scheme, through respectively connecting the quick clamp 311 with the mounting plate 21 and the fixed plate 312, after the fixed plate 312 is fixed with the bottom plate 1, the quick clamp 311 is push-pull, and the handle of the quick clamp 311 is pushed to drive the telescopic rod, so that the mounting plate 21 is pushed to translate on the bottom plate 1. In order to enable the quick clamp 311 to meet the requirement of multiple displacements of the mounting plate 21 during pushing, the mounting plate 21 is translated on the bottom plate 1, so that the tab S1 on the core pack S is located at other welding positions away from the first welding position P1. As shown in fig. 1, in this embodiment, the distance between the fixing plate 312 and the mounting plate 21 may be adjusted to be smaller by adjusting the distance between the fixing plate 312 and the mounting plate 21 in the initial state, and then the fixing plate 312 is fixed on the base plate 1, so that when the mounting plate 21 is pushed to translate by the quick clamp 311, a larger distance separation is formed between the mounting plate 21 and the fixing plate 312, and in the translation process of the mounting plate 21, a plurality of welding positions except the first welding P1 position on the tab S1 may correspond to the ultrasonic welding heads, thereby satisfying sequential welding of a plurality of welding marks.

Since the quick clamp 311 is not fully pressed in place in one step during the translation process of pushing the mounting plate 21, there is a pressing allowance for avoiding the spring back of the mounting plate 21, and the welding position of the tab S1 on the core pack S is dislocated.

The third locating piece 4 has still been set up on bottom plate 1 to this embodiment, and third locating piece 4 is provided with two, is located mounting panel 21 length direction both ends respectively, and the length direction of third locating piece 4 flushes with mounting panel 21 width direction, sets up from this, and mounting panel 21 can be guided through two parallel third locating pieces 4 when the translation, guarantees that mounting panel 21 is in sharp translation.

In addition, in the present embodiment, the positioning balls 41 are provided on the surface of the third positioning member 4 facing the mounting plate 21, and a plurality of positioning recesses 216 connected to the positioning balls 41 are provided on the surface of the mounting plate 21 at intervals in the width direction thereof. By matching the spacing between the positioning pits 216 with the spacing between the solder marks, the quick clamp 311 can be conveniently matched with the positioning pits 216 through the positioning balls 41 on the third positioning piece 4 when pushing the first positioning piece 2, so that the positioning of the solder mark positions except the first solder mark P1 is realized.

In some embodiments, the second positioning member 32 is horizontally disposed on the fixing plate 312, and the length direction of the second positioning member 32 is perpendicular to the length direction of the fixing plate 312, and the position of the second positioning member 32 on the fixing plate 312 can be adjusted relative to the mounting plate 21. In this way, in the initial state, the first positioning component 2 is translated, so that the ultrasonic welding head is aligned to the position where the first welding mark P1 on the tab S1 is located, the distance between the fixing plate 312 and the mounting plate 21 is reduced, then the fixing plate 312 is fixed on the bottom plate 1, at this time, the position of the second positioning piece 32 on the fixing plate 312 is adjusted, and the side surface of the mounting plate 21 in the width direction is ensured to be contacted with the second positioning piece 32. In this way, the position adjustment of the quick clamp 311 and the second positioning member 32 on the bottom plate 1 can be completed, and the two are mutually matched for adjustment, so that the position positioning of the second positioning assembly 3 on the bottom plate 1 can be quickly realized.

The working principle of the utility model is as follows:

after the core pack S is positioned on the mounting plate 21 by the plurality of first positioning pieces 22, the tab S1 to be welded at one end of the core pack S is pressed by the tab pressing device 23. In the initial state, the first positioning component 2 is translated, the ultrasonic welding head is aligned to the position where the first strip welding mark P1 on the tab S1 is located, the distance between the fixed plate 312 and the mounting plate 21 is reduced, then the fixed plate 312 is fixed on the bottom plate 1, at this time, the position of the second positioning component 32 on the fixed plate 312 is regulated, the lateral surface of the mounting plate 21 in the width direction is guaranteed to be contacted with the second positioning component 32, the positioning of the quick clamp 311 and the second positioning component 32 on the bottom plate 1 is completed, after the first strip welding mark P1 on the tab S1 is welded, the quick clamp 311 drives the first positioning component 2 to be far away from the second positioning component 32, so that the tab S1 on the core package S is located at the position of the second strip welding mark P2, the welding operation of the second strip welding mark P2 on the tab S1 is completed, the first positioning component 2 is driven to translate continuously through the pushing device 31, the tab S1 on the core package S1 can be located at more welding marks, and the sequential welding marks on the tab S1 can be completed. After the electrode lugs S1 on the core package S are welded by a plurality of welding marks, the electrode lug pressing device 23 is taken down from the mounting plate 21, the core package S is taken down, and the next core package S is replaced, and as the welding fixture is positioned, the electrode lugs S1 can be welded on all the core packages S in batches, and the consistency of the welding marks of the core packages S is improved.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. The utility model provides an electricity core utmost point ear welding jig which characterized in that includes:

a bottom plate (1);

the first positioning component (2) comprises a mounting plate (21), a first positioning piece (22) and a lug pressing device (23), wherein the first positioning piece (22) and the lug pressing device (23) are arranged on the mounting plate (21), the mounting plate (21) is horizontally arranged on the bottom plate (1) and used for placing the core bags (S), the first positioning piece (22) is provided with a plurality of first positioning pieces and used for positioning the core bags (S) in the horizontal direction, and the lug pressing device (23) is detachably arranged at one end of the mounting plate (21) in the length direction and used for pressing lugs at one end of the core bags (S);

the second locating component (3) is arranged on the bottom plate (1) and is located on one side of the width direction of the mounting plate (21), the second locating component (3) comprises a pushing device (31) and a second locating piece (32), the second locating piece (32) is used for limiting the position of the first locating component (2) on the bottom plate (1) along the width direction of the mounting plate (21) so that the tab on the core pack (S) is located at the position of the first welding mark (P1), and the pushing device (31) is used for driving the first locating component (2) to translate along the width direction of the mounting plate (21) and far away from the second locating piece (32) so that the tab on the core pack (S) is located at other welding mark positions.

2. The battery cell tab welding fixture of claim 1, wherein: the utility model discloses a pole lug compression device, including mounting panel (21), first setting element (22), second setting element, lug compression device (23) and mounting panel (21), mounting panel (21) top surface has first region (211) of placing core package (S), first setting element (22) are located first region (211) width direction both sides and first region (211) length direction keep away from one end of pole lug compression device (23), mounting panel (21) top surface is provided with spout (212) that are used for installing first setting element (22), the position in spout (212) is adjustable to first setting element (22).

3. The battery cell tab welding fixture of claim 2, wherein: the utility model discloses a pole lug pressing device, including mounting panel (21) length direction one end has second region (213) of placing the pole lug, pole lug closing device (23) are including clamp plate (231) and locating plate (232) that are located clamp plate (231) length direction both ends, clamp plate (231) are relative to two locating plate (232) undercut, mounting panel (21) top surface in second region (213) length direction both sides is provided with positioning seat (214) respectively, clamp plate (231) level is located between two positioning seat (214) for draw in the pole lug on second region (213) and flatten, locating plate (232) level is located positioning seat (214) top surface.

4. The battery cell tab welding fixture of claim 3, wherein: the first magnetic pieces (2321) which are mutually adsorbed are arranged on the surfaces, which are contacted with the positioning plate (232), of the positioning seat (214).

5. The battery cell tab welding fixture of claim 3, wherein: the second area (213) is provided with a first welding through hole (215) penetrating through the mounting plate (21) along the width direction of the mounting plate (21), the bottom plate (1) is provided with a corresponding avoidance hole (11) of the first welding through hole (215), and the pressing plate (231) is provided with a second welding through hole (2311) corresponding to the first welding through hole (215).

6. The battery cell tab welding fixture of claim 1, wherein: second setting element (32) are provided with two for thrust unit (31) symmetry, and second setting element (32) are including locating lever (321) and second magnetic part (322), locating lever (321) set up on bottom plate (1), just locating lever (321) length direction is perpendicular with the length direction of mounting panel (21), locating lever (321) can adjust its position on bottom plate (1) for mounting panel (21), and second magnetic part (322) are fixed to be set up in locating lever (321) towards the one end of mounting panel (21), second magnetic part (322) are used for adsorbing mounting panel (21) width direction lateral wall.

7. The battery cell tab welding fixture of claim 1, wherein: the pushing device (31) comprises a quick clamp (311) and a fixing plate (312), the fixing end of the quick clamp (311) is fixedly arranged on the fixing plate (312), the telescopic end of the quick clamp (311) is fixedly connected with the mounting plate (21), the direction of the telescopic end of the quick clamp (311) is perpendicular to the length direction of the mounting plate (21), the fixing plate (312) is horizontally arranged on the bottom plate (1), and the fixing plate (312) can be used for adjusting the position of the fixing plate (312) on the bottom plate (1) relative to the mounting plate (21).

8. The battery cell tab welding fixture of claim 7, wherein: still including fixed setting third setting spare (4) on bottom plate (1), third setting spare (4) are provided with two, are located mounting panel (21) length direction both ends respectively, and the length direction of third setting spare (4) flushes with mounting panel (21) width direction, one side of third setting spare (4) towards mounting panel (21) is provided with location ball (41), mounting panel (21) surface is provided with a plurality of location pit (216) that are used for being connected with location ball (41) along its width direction interval, interval between location pit (216) and the interval assorted between the welding seal.

9. The battery cell tab welding fixture of claim 7, wherein: the second positioning piece (32) is horizontally arranged on the fixed plate (312), the length direction of the second positioning piece (32) is perpendicular to the length direction of the fixed plate (312), and the position of the second positioning piece (32) on the fixed plate (312) can be adjusted relative to the mounting plate (21).