CN220591968U - Welding device for electrode lug and pin of battery cell - Google Patents

Abstract

The utility model provides a welding device for a battery cell tab and a pin, and belongs to the technical field of new energy battery processing equipment. The welding device comprises a bottom plate, a first positioning assembly and a second positioning assembly. Two positioning bosses are arranged on the bottom plate along the first direction at intervals, a welding plane is arranged at the top of each positioning boss, and a welding seat hole communicated with the bottom of the bottom plate is arranged on each welding plane. The first locating component is arranged on the bottom plate and used for limiting and fixing the battery cell cover plate and the winding core in a second direction, and the second direction is perpendicular to the first direction. The second positioning assembly comprises two positioning press covers, the two positioning press covers are installed on the two positioning bosses in a one-to-one correspondence mode, the bottoms of the positioning press covers are arranged at intervals with the welding plane, and welding lug limiting grooves are formed in the positioning press covers. The welding device can solve the technical problem that the alignment of the lug, the pin and the protective soldering lug is inaccurate in the welding process, is convenient to operate and adjust, can effectively position and compress parts to be welded, and improves the welding precision and quality.

Description

Welding device for electrode lug and pin of battery cell

Technical Field

The utility model relates to the technical field of new energy battery processing equipment, in particular to a welding device for a battery lug and a pin.

Background

At present, the electric automobile has entered into rapid development, but the charging time and the endurance mileage are still pain points for preventing the development of the electric automobile. The lithium ion power battery has become the first choice power source of new energy automobiles due to the characteristics of high energy density, long cycle life, environmental friendliness and the like. Among them, the square battery of aluminum shell is a common packaging form of lithium ion power battery.

In the related art, a case of a battery cell in a prismatic battery generally includes a lower case and a cap plate, and a terminal is disposed on the cap plate, with an upper portion of the lower case being opened. When square battery core is prepared, after one end of the current collector pin is welded with the pole on the cover plate, the other end of the current collector pin is welded with the pole lug extending out of the winding core by ultrasonic, and finally the cover plate and the lower shell are covered. And for the electrode lug with thicker size, the welding head pressure is larger in the process of welding with the pin, the pin pressure is easy to weld directly, and a protective welding lug is required to be arranged on one side of the pin to share the stress.

In the related art, in the process of overlapping and ultrasonic welding of the electrode lug, the pin and the protective soldering lug, the position of the protective soldering lug is inaccurate, deviation occurs between the protective soldering lug and the pin welding position, the pin is still broken in the welding process of pressing down the welding head, and the welding precision and the welding quality of the battery cell of the product are affected.

Disclosure of Invention

The embodiment of the utility model provides a welding device for a battery cell tab and a pin, which can solve the technical problem of inaccurate alignment of the tab, the pin and a protective soldering lug in the welding process, is convenient to operate and adjust, can effectively position and compress parts to be welded, and improves the welding precision and quality. The technical scheme is as follows:

the embodiment of the utility model provides a welding device for battery cell tabs and pins, which comprises a bottom plate, wherein two positioning bosses are arranged on the bottom plate at intervals along a first direction, a welding plane is arranged at the top of each positioning boss, and a welding seat hole communicated with the bottom of the bottom plate is arranged on the welding plane;

the first positioning assembly is arranged on the bottom plate and used for limiting and fixing the battery cell cover plate and the winding core in a second direction, and the second direction is perpendicular to the first direction;

the second positioning assembly comprises two positioning press covers, the two positioning press covers are installed on the two positioning bosses in a one-to-one correspondence mode, the bottoms of the positioning press covers are arranged at intervals with the welding plane, and welding lug limiting grooves are formed in the positioning press covers.

Optionally, the soldering lug limiting groove is formed in the side part of the positioning gland and is communicated with the top and the bottom of the positioning gland, and the openings of the two soldering lug limiting grooves on the positioning gland are oppositely arranged.

Optionally, the positioning gland is detachably connected with the positioning boss.

Optionally, the first positioning component includes a core block and a cover plate limiting block, the core block and the cover plate limiting block are respectively arranged at two ends of the bottom plate along the second direction, and the position of the core block on the bottom plate is adjustable along the second direction.

Optionally, two cover plate limiting blocks are provided, a pole positioning groove is formed in one side, close to the winding core stop block, of each cover plate limiting block, and an opening communicated with the pole positioning groove is formed in one side face, opposite to the cover plate limiting blocks, of each cover plate limiting block.

Optionally, be provided with the bar recess on the bottom plate, the bar recess is followed the first direction is arranged and a side wall with the apron stopper is close to a side parallel and level of core dog.

Optionally, electric core utmost point ear and pin welding set still include the regulation support, the regulation support includes backing plate and two stopper, the backing plate middle part is provided with the seat of welding and stretches out the groove, two stopper edges first direction interval arrange in on the backing plate, and for the seat of welding stretches out groove symmetrical arrangement, the bottom plate set up in on the backing plate and slidable install in between two stopper, the interval of two stoppers is greater than the bottom plate is in width in the first direction, be provided with on the backing plate be used for with ultrasonic welding equipment base connection's bolted connection hole.

Optionally, the stopper is the strip and follows the second direction is arranged, the length of stopper is greater than the bottom plate is in the ascending width of second direction, the both ends of stopper are provided with spacing fender reason, spacing fender reason orientation the bottom plate protrusion is arranged, weld the seat hole with the location boss orientation the one side terminal surface intercommunication of apron stopper.

Optionally, the stopper is magnetic material structure, be provided with on the bottom plate with spacing fender edge assorted magnetism is inhaled the portion.

Optionally, the distance between the two limiting blocks is adjustable.

The technical scheme provided by the embodiment of the utility model has the beneficial effects that at least:

by adopting the welding device for the battery cell electrode lugs and the pins, provided by the embodiment of the utility model, the bottom plate is used for butt joint with the base of the ultrasonic welding equipment, and the battery cell cover plate and the coil to be welded are supported and installed. The two positioning bosses can position the winding core in the first direction, support the lugs and pins which are arranged in a stacked mode through the welding plane, and the welding seat on the base of the ultrasonic welding equipment stretches into the bottom of the welding seat hole and contacts with the lugs. The first positioning component is matched with the two positioning bosses to perform pre-positioning on the battery cell cover plate and the winding core before welding by four sides. Finally, the lug and the pin are pressed by the positioning gland correspondingly arranged on the positioning boss, the welding protection sheet is arranged in the welding sheet limiting groove formed in the positioning gland and is downwards arranged in the welding head to realize ultrasonic pressure welding of the laminated structure, the protection welding sheet is always positioned at a correct welding position under the limit of the welding sheet limiting groove, the technical problem that the lug, the pin and the protection welding sheet are inaccurate in alignment in the welding process can be solved, the operation and the adjustment are convenient, the parts to be welded can be effectively positioned and pressed, and the welding precision and quality are improved.

Drawings

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

Fig. 1 is a schematic perspective view of a welding device for a battery lug and a pin according to an embodiment of the present utility model;

fig. 2 is a schematic diagram of a partial structure of a welding device for a battery lug and a pin according to an embodiment of the present utility model;

FIG. 3 is a schematic top view of FIG. 2;

fig. 4 is a schematic structural diagram of a battery cell cover plate and a winding core according to an embodiment of the present utility model;

FIG. 5 is a schematic perspective view of a base plate according to an embodiment of the present utility model;

FIG. 6 is a schematic perspective view of an adjusting support according to an embodiment of the present utility model;

fig. 7 is a schematic perspective view of a pad according to an embodiment of the present utility model.

In the figure:

1-a bottom plate; 1 a-a first bolt hole; 2-a first positioning assembly; 3-a second positioning assembly; 4-adjusting the support; 11-positioning bosses; 11 a-contact surface; 12-a strip-shaped groove; 13-a magnetic attraction part; 21-a winding core stop block; 22-cover plate limiting blocks; 31-positioning a gland; 41-backing plate; 41 a-a second bolt hole; 42-limiting blocks; 111-a welding plane; 112-welding seat holes; 211-a first kidney-shaped counterbore; 221-pole positioning grooves; 311-soldering lug limit grooves; 312-connecting blocks; 313-locating pins; 411-weld base extension slot; 412-a bolt connection hole; 413-square sink; 421-limiting stop edge; 422-a second kidney-shaped counterbore; m-cell cover plate; m 1-pole; m 2-pins; n-winding cores; n 1-tab; o-shield tab.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the embodiments of the present utility model will be described in further detail with reference to the accompanying drawings.

In the related art, a case of a battery cell in a prismatic battery generally includes a lower case and a cap plate, and a terminal is disposed on the cap plate, with an upper portion of the lower case being opened. When square battery core is prepared, after one end of the current collector pin is welded with the pole on the cover plate, the other end of the current collector pin is welded with the pole lug extending out of the winding core by ultrasonic, and finally the cover plate and the lower shell are covered. And for the electrode lug with thicker size, the welding head pressure is larger in the process of welding with the pin, the pin pressure is easy to weld directly, and a protective welding lug is required to be arranged on one side of the pin to share the stress.

In the related art, in the process of overlapping and ultrasonic welding of the electrode lug, the pin and the protective soldering lug, the position of the protective soldering lug is inaccurate, deviation occurs between the protective soldering lug and the pin welding position, the pin is still broken in the welding process of pressing down the welding head, and the welding precision and the welding quality of the battery cell of the product are affected.

Fig. 1 is a schematic perspective view of a welding device for a battery lug and a pin according to an embodiment of the present utility model. Fig. 2 is a schematic diagram of a partial structure of a welding device for a battery lug and a pin according to an embodiment of the present utility model. Fig. 3 is a schematic top view of fig. 2. Fig. 4 is a schematic structural diagram of a battery cell cover plate and a winding core according to an embodiment of the present utility model. Fig. 5 is a schematic perspective view of a base plate according to an embodiment of the present utility model. Fig. 6 is a schematic perspective view of an adjusting support according to an embodiment of the present utility model. Fig. 7 is a schematic perspective view of a pad according to an embodiment of the present utility model. As shown in fig. 1 to 7, through practice, the present utility model provides a welding device for a battery tab and a pin, which comprises a base plate 1, a first positioning assembly 2 and a second positioning assembly 3.

Wherein, be provided with two location bosss 11 along first direction interval on the bottom plate 1, location boss 11 top is provided with welding plane 111, is provided with the welding seat hole 112 of intercommunication bottom plate 1 bottom on the welding plane 111.

The first positioning component 2 is arranged on the bottom plate and used for limiting and fixing the battery cell cover plate m and the winding core n in a second direction, and the second direction is perpendicular to the first direction.

The second positioning assembly 3 comprises two positioning press covers 31, the two positioning press covers 31 are installed on the two positioning bosses 11 in a one-to-one correspondence manner, the bottoms of the positioning press covers 31 are arranged at intervals with the welding plane 111, and welding lug limiting grooves 311 are formed in the positioning press covers 31.

In the embodiment of the utility model, the bottom plate 1 of the welding device for the electrode lugs and the pins of the battery cell is arranged on the base of ultrasonic welding equipment to carry out processing work. When the current collector pin m2 connected with the pole column m1 on the battery core cover plate m and the pole lug n1 on the side of the winding core n are required to be stacked and welded, the winding core n is firstly horizontally arranged on the bottom plate 1 in a manner that the winding core n faces downwards in a large surface manner and is arranged between the two positioning bosses 11. In the first direction, tabs n1 extending from two sides of the winding core n and integrally pre-welded are respectively arranged on the two positioning bosses 11, and two side end faces of the winding core n in the first direction are abutted with the two positioning bosses 11 for positioning. And then the battery cell cover plate m is transversely arranged at the side of the winding core n, and the installation state of the battery cell cover plate m and the winding core n is kept when the battery cell cover plate m is covered on the battery cell shell. At this time, the pole column m1 on the battery core cover plate m is disposed back to the winding core n, and the connection pin m2 on the other side and the winding core n extends to the positioning boss 11 and is covered on one side of the pole ear n1 back to the positioning boss 11, so as to form a laminated structure of the pole ear n1 and the pin m 2. And then the first positioning component 2 is utilized to limit and fix the battery cell cover plate m and the winding core n along the second direction, four faces are used for carrying out the pre-positioning before welding the battery cell cover plate m and the winding core n, a welding seat on the lower ultrasonic welding equipment base extends into the welding seat hole 112 from the bottom of the bottom plate 1, and the welding end of the welding seat is flush with the welding plane 111 so as to support the welding area of the tab n1 on the side opposite to the pin m 2. After that, two positioning press covers 31 are installed on the two positioning bosses 11 in a one-to-one correspondence manner, after the positioning press covers 31 are installed in place, the electrode lugs n1 and the pins m2 which are stacked and arranged are just arranged in an assembly gap between the bottom of the positioning press covers 31 and the welding plane 111, and the bottom of the positioning press covers 31 limit and press one side surface of the pins m2, which faces away from the electrode lugs n 1. Before ultrasonic welding, the protection welding lug o can be installed in the welding lug limiting groove 311 to form a laminated structure of the tab n1, the pin m2 and the protection welding lug o, and the side wall of the welding lug limiting groove 311 can limit and guide the position of the protection welding lug o to ensure that the protection welding lug o is just positioned at the position to be welded. Finally, the welding head of the welding equipment stretches into and presses the protective welding lug o from the opening of the welding lug limiting groove 311, and the protective welding lug o, the pin m2 and the protective welding lug o are subjected to ultrasonic welding together with the welding seat positioned at the other side, so that the protective welding lug o can be always positioned at a correct welding position under the limit of the welding lug limiting groove 311 of the positioning gland 31 in the corresponding placing and welding process.

By adopting the welding device for the battery cell electrode lugs and the pins, provided by the embodiment of the utility model, the bottom plate 1 is used for butt joint with the base of the ultrasonic welding equipment, and the battery cell cover plate m and the winding core n to be welded are supported and installed. The two positioning bosses 11 can position the winding core n in the first direction and support the electrode lugs n1 and the pins m2 which are arranged in a stacked mode through the welding plane 111, and a welding seat on the base of the ultrasonic welding equipment stretches into the bottom of the welding seat hole 112 and contacts with the electrode lugs n 1. The first positioning assembly 2 is matched with two positioning bosses 11 to pre-position the battery cell cover plate m and the winding core n before welding by four sides. Finally, the positioning press cover 31 correspondingly arranged on the positioning boss 11 is utilized to press the lug n1 and the pin m2, the welding protection sheet is filled into the welding sheet limiting groove 311 formed in the positioning press cover 31 and the welding head is put down to realize ultrasonic pressure welding of the laminated structure, the protection welding sheet o is always positioned at a correct welding position under the limit of the welding sheet limiting groove 311, the technical problem that the lug, the pin and the protection welding sheet o are inaccurate in alignment in the welding process can be solved, the operation and the adjustment are convenient, the effective positioning and the compression can be carried out on parts to be welded, and the welding precision and the welding quality are improved.

Illustratively, in one possible implementation of the embodiment of the present utility model, the contact surface 11a of the positioning boss 11 for abutting against the side end surface of the winding core n extending out of the tab n1 may be an inclined surface disposed at an acute angle to the top end surface of the base plate 1. Under the condition that the battery core with a thicker thickness dimension forms a side-out tab, the tab sections of the multi-layer pole piece, which extend out, are combined and pre-welded to form an integrated tab n1, and the side end face of the winding core n correspondingly forms an end face structure which is inclined from two ends to the middle. And the damage caused by stress to the inclined side end surface of the winding core n in the abutting positioning process is prevented.

Alternatively, the soldering lug limiting grooves 311 are formed on the side parts of the positioning press covers 31 and are communicated with the top and the bottom of the positioning press covers 31, and the openings of the soldering lug limiting grooves 311 on the two positioning press covers 31 are oppositely arranged. Illustratively, in the embodiment of the present utility model, the lug limiting groove 311 of the positioning gland 31 is a side opening structure, and the positioning gland 31 is integrally formed in a "C" type structure. The positioning gland 31 limits and fixes the protection welding lug o through three side walls of the welding lug limiting groove 311 with an opening structure, and the opening end of the positioning gland directly corresponds to one side end face of the electrode tab of the electrode coil core n, and the last side face of the protection welding lug o can be positioned by utilizing the end face. The positioning gland with the C-shaped structure can avoid forming the soldering lug limiting groove 311 by digging holes in the middle, has simple processing technology, is convenient for corresponding assembly of the protection soldering lug o, and reduces the material cost.

Optionally, the positioning gland 31 is detachably connected to the positioning boss 11. Illustratively, in the embodiment of the present utility model, a connection block 312 is disposed on the other side of the positioning gland 31 opposite to the soldering lug limiting groove 311, and is detachably connected to a mounting plane of the positioning boss 11, which is higher than the welding plane 111, for example, the positioning gland 31 is a magnetic structural member, and a magnet matched with the positioning gland is disposed on the mounting plane of the positioning boss 11, and the positioning gland 31 and the positioning boss are fixed by magnetic attraction and limited and fixed by a positioning pin 313 during mounting. Simple structure, easy dismounting is convenient for accomodate and maintain the change when not using.

Optionally, the first positioning component 2 includes a core stop block 21 and a cover plate stop block 22, where the core stop block 21 and the cover plate stop block 22 are respectively disposed at two ends of the bottom plate 1 along the second direction, and the position of the core stop block 21 on the bottom plate 1 is adjustable along the second direction. For example, in the embodiment of the present utility model, the cover limiting block 22 located at one side is used for abutting against a side surface of the battery cell cover plate m, on which the pole post m1 is disposed, while at the other side in the second direction, the winding core n is abutted and positioned by the winding core stop block 21, and the longitudinal compression of the positioning gland 31 is matched to ensure that the stacked tabs n1 and pins m2 are stacked stably, so as to avoid the separation of the battery cell cover plate m and the winding core n in the second direction. And be provided with along the first waist shape counter bore 211 that the second direction was arranged on the core dog 21, be provided with on bottom plate 1 with first waist shape counter bore 211 assorted first bolt hole 1a, according to the width dimension of core n in the second direction, can follow the interval of second direction regulation between core dog 21 and the apron stopper 22 in order to install the adaptation to fix through the bolt that goes into at last, simple structure, it is convenient to adjust, effectively improves electric core tab and pin welding set's suitability.

Optionally, two cover plate limiting blocks 22 are provided, one side of each cover plate limiting block 22, which is close to the winding core stop block 21, is provided with a pole positioning groove 221, and one side surface, opposite to the two cover plate limiting blocks 22, is provided with an opening communicated with the pole positioning groove 221. In the embodiment of the utility model, when the cover plate limit block 22 is used to limit and fix the battery cell cover plate m, one side end surface of the two cover plate limit blocks 22, which is close to the winding core stop block 21, is attached to the plate surface of the battery cell cover plate m, and the pole positioning groove 221 is matched and clamped with two poles m1 protruding from the battery cell cover plate m, so that the battery cell cover plate m is further limited and fixed in the first direction, relative shaking in the first direction is avoided, and the positioning stability is further improved.

Optionally, a strip-shaped groove 12 is provided on the bottom plate 1, the strip-shaped groove 12 is arranged along the first direction, and a side wall of the strip-shaped groove is flush with a side surface of the cover plate limiting block 22, which is close to the winding core stop block 21. For example, in the embodiment of the present utility model, when the battery cell cover plate m is laterally placed beside the winding core n, a side plate surface of the battery cell cover plate m with the pole post m1 protruding is abutted against the cover plate limiting block 22, and meanwhile, a side part of the battery cell cover plate m is correspondingly inserted into the groove of the strip-shaped groove 12, so that toppling and shaking during the subsequent matching positioning and installation process are avoided, and positioning stability is further improved.

Optionally, the welding device for the battery cell tab and the pin further comprises an adjusting support 4, the adjusting support 4 comprises a base plate 41 and two limiting blocks 42, a welding seat extending slot 411 is formed in the middle of the base plate 41, the two limiting blocks 42 are arranged on the base plate 41 at intervals along the first direction and symmetrically arranged relative to the welding seat extending slot 411, the base plate 1 is arranged on the base plate 41 and slidably installed between the two limiting blocks 42, the distance between the two limiting blocks 42 is larger than the width of the base plate 1 in the first direction, and a bolt connecting hole 412 used for being connected with a base of the ultrasonic welding device is formed in the base plate 41. In an exemplary embodiment of the present utility model, only one anvil is typically provided on a conventional ultrasonic welding apparatus base, with the anvil and horn being fixed in position. Through setting up adjusting support 4, through adjusting the position of bottom plate 1 on backing plate 41 along the second direction at initial assembly time, make bottom plate 1 one end and one of them stopper 42 butt, the welding seat stretches into from the bottom through welding seat stretch out the groove 411 to in the welding seat hole 112 on bottom plate 1 that is located welding seat stretch out the groove 411 top gets into the location boss 11 that is close to another stopper 42 wherein, thereby carries out the welding of utmost point ear n1 and pin m2 of a roll core n side. When the welding of the tab n1 and the pin m2 at the other side is required, the welding seat is controlled to descend, so that the position of the bottom plate 1 on the backing plate 41 can be adjusted along the second direction, one end of the bottom plate 1 is abutted against one of the limiting blocks 42, and the welding seat hole 112 far away from the bottom of the positioning boss 11 of the other limiting block 42 is moved to the position above the welding seat extending slot 411, so that positioning is completed. The welding device has the advantages that the whole structure is simple, the adjustment is convenient, the welding positions of the lugs n1 and the pins m2 on the two sides of the winding core n are aligned with the welding equipment on the basis that the positions of the welding seat and the welding head are not adjusted, and the practicability of the welding device for the lugs and the pins of the battery cell is effectively improved.

Optionally, the limiting block 42 is strip-shaped and is arranged along the second direction, the length of the limiting block 42 is greater than the width of the bottom plate 1 in the second direction, limiting stop edges 421 are arranged at two ends of the limiting block 42, the limiting stop edges 421 are arranged towards the bottom plate 1 in a protruding mode, and the welding seat hole 112 is communicated with one side end face of the positioning boss 11 towards the cover plate limiting block 22. For example, due to the limited size of the positioning gland 31, when the length of the overlapped part to be soldered of the tab n1 and the pin m2 is long, the opening of the tab limit groove 311 may not cover all the positions to be soldered. Therefore, in the embodiment of the present utility model, the stopper 42 is configured as a long strip with a length longer than the width of the bottom plate 1, and the two ends thereof are protruded with the stopper edge 421 for performing the stroke limitation. The bottom plate 1 abutted against the stopper 42 can slide along the length direction of the stopper 42, that is, the second direction. When the bottom plate is abutted against the one-side limiting stop edge 421, the welding seat and the welding head can carry out ultrasonic welding on the part to be welded, where the electrode lug n1 and a part of the pin m2 are overlapped in the second direction. And then the bottom plate 1 can slide along the edge of the limiting block 42 until being abutted against the limiting block edge 421 at the other side, so that the tab n1 and the remaining part to be welded of the pin m2 in the second direction are welded. The integrated continuous welding device has the advantages that the integrated continuous welding device is simple in integral structure and convenient to adjust, long welding positions can be realized, and the practicability of the welding device for the battery cell electrode lugs and the pins is further improved.

Illustratively, in the above-mentioned scheme of the embodiment of the present utility model, by communicating the weld holder hole 112 with the end surface of the positioning boss 11 facing the cover plate stopper 22, it is convenient to leave a margin for the fixed weld holder extending into the weld holder hole 112 when moving along the length direction of the stopper 42, so as to avoid interference.

Optionally, the limiting block 42 is a magnetic structural member, and the bottom plate 1 is provided with a magnetic attraction portion 13 matched with the limiting blocking edge 421. Illustratively, in the embodiment of the present utility model, a magnetic attraction portion, such as a magnet, is embedded in an edge portion of the side edge of the base plate 1 for abutting against the limit stop edge 421 to achieve limit. The base plate 1 can be moved in place and is in butt joint with the limiting stop edge 421, the base plate and the limiting stop edge are guaranteed to be magnetically attracted and fixed, loosening and shaking in the welding process are avoided, and welding stability is effectively improved.

For example, the magnetic attraction portion 13 may be provided on a side wall of the base plate 1 for abutting against the stopper 42 to further improve the overall magnetic attraction stability.

Optionally, the spacing between the two stop blocks 42 is adjustable. In the embodiment of the present utility model, the limiting blocks 42 are provided with the second kidney-shaped counter bores 422 arranged along the first direction, the backing plate 41 is provided with the second bolt holes 41a matched with the second kidney-shaped counter bores 422, the distance between the two limiting blocks 42 can be adjusted along the first direction according to the width dimension of the winding core n in the first direction so as to adjust the length of the movable path of the bottom plate 1 in the first direction, and finally the positioning boss 11 where the to-be-welded is located is fixed through the lower bolts, so that the positioning boss 11 can exactly correspond to the welding seat in the welding seat extending slot 411.

Illustratively, in the embodiment of the present utility model, a square sinking groove 413 is disposed on one side surface of the backing plate 41, and the welding seat extending groove 411, the two limiting blocks 42 and the bottom plate 1 are all disposed in the square sinking groove, so that the longitudinal dimension of the welding device is effectively reduced. Meanwhile, the two limiting blocks 42 are respectively abutted against two opposite side walls of the square sinking groove in the first direction in the initial state, so that positioning and installation are facilitated.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, is intended to mean that elements or items that are present in front of "comprising" or "comprising" are included in the word "comprising" or "comprising", and equivalents thereof, without excluding other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to denote relative positional relationships, which may also change accordingly when the absolute position of the object to be described changes.

The foregoing description of the preferred embodiments of the present utility model is not intended to limit the utility model, but rather, the utility model is to be construed as limited to the appended claims.

Claims (10)

1. Welding device for battery cell tab and pin, which is characterized by comprising:

the welding device comprises a bottom plate (1), wherein two positioning bosses (11) are arranged on the bottom plate (1) at intervals along a first direction, a welding plane (111) is arranged at the top of each positioning boss (11), and a welding seat hole (112) communicated with the bottom of the bottom plate (1) is formed in each welding plane (111);

the first positioning component (2) is arranged on the bottom plate (1) and used for limiting and fixing the battery cell cover plate (m) and the winding core (n) in a second direction, and the second direction is perpendicular to the first direction;

the second positioning assembly (3) comprises two positioning press covers (31), the two positioning press covers (31) are installed on the two positioning bosses (11) in a one-to-one correspondence mode, the bottoms of the positioning press covers (31) are arranged at intervals with the welding planes (111), and welding lug limiting grooves (311) are formed in the positioning press covers (31).

2. The welding device for the battery cell tab and the pin according to claim 1, wherein the soldering lug limiting grooves (311) are formed in the side portions of the positioning press covers (31) and are communicated with the top and the bottom of the positioning press covers (31), and openings of the soldering lug limiting grooves (311) on the two positioning press covers (31) are oppositely arranged.

3. The welding device for the battery cell tab and the pin according to claim 2, wherein the positioning gland (31) is detachably connected with the positioning boss (11).

4. The welding device for the battery cell tab and the pin according to claim 1, wherein the first positioning assembly (2) comprises a winding core stop block (21) and a cover plate limiting block (22), the winding core stop block (21) and the cover plate limiting block (22) are respectively arranged at two ends of the bottom plate (1) along the second direction, and the position of the winding core stop block (21) on the bottom plate (1) is adjustable along the second direction.

5. The welding device for the battery cell tabs and the pins according to claim 4, wherein two cover plate limiting blocks (22) are arranged, a pole positioning groove (221) is formed in one side, close to the winding core stop block (21), of each cover plate limiting block (22), and an opening communicated with the pole positioning groove (221) is formed in one side face, opposite to the two cover plate limiting blocks (22).

6. The welding device for the battery cell tab and the pin according to claim 4, wherein a strip-shaped groove (12) is formed in the bottom plate (1), the strip-shaped groove (12) is arranged along the first direction, and a side wall of the strip-shaped groove is flush with a side surface of the cover plate limiting block (22) close to the winding core stop block (21).

7. The welding device for the battery cell tab and the pin according to claim 4, further comprising an adjusting support (4), wherein the adjusting support (4) comprises a base plate (41) and two limiting blocks (42), a welding seat extending groove (411) is formed in the middle of the base plate (41), the two limiting blocks (42) are arranged on the base plate (41) at intervals along the first direction and symmetrically arranged relative to the welding seat extending groove (411), the base plate (1) is arranged on the base plate (41) and slidably installed between the two limiting blocks (42), the distance between the two limiting blocks (42) is larger than the width of the base plate (1) in the first direction, and a bolt connecting hole (412) for being connected with a base of an ultrasonic welding device is formed in the base plate (41).

8. The welding device for the battery cell tab and the pin according to claim 7, wherein the limiting block (42) is strip-shaped and is arranged along the second direction, the length of the limiting block (42) is larger than the width of the bottom plate (1) in the second direction, limiting blocking edges (421) are arranged at two ends of the limiting block (42), the limiting blocking edges (421) are arranged towards the bottom plate (1) in a protruding mode, and the welding seat hole (112) is communicated with one side end face of the positioning boss (11) towards the cover plate limiting block (22).

9. The welding device for the battery cell tab and the pin according to claim 8, wherein the limiting block (42) is a magnetic structural member, and the bottom plate (1) is provided with a magnetic attraction part (13) matched with the limiting blocking edge (421).

10. The device for welding a tab and a pin of a battery cell according to claim 7, wherein a distance between the two stoppers (42) is adjustable.