CN221313032U

CN221313032U - Welding fixture

Info

Publication number: CN221313032U
Application number: CN202322837810.XU
Authority: CN
Inventors: 刘明明
Original assignee: Eve Energy Co Ltd
Current assignee: Eve Energy Co Ltd
Priority date: 2023-10-20
Filing date: 2023-10-20
Publication date: 2024-07-12
Anticipated expiration: 2033-10-20

Abstract

The utility model relates to the technical field of battery production, and discloses a welding fixture. The welding fixture comprises a bracket, a pressing piece and two pressing blocks, wherein the two pressing blocks are oppositely arranged and are used for placing a battery cell, and each pressing block is provided with a welding hole opposite to the connecting sheet; an accommodating space is formed in the bracket, two pressing blocks and the battery cell are positioned in the accommodating space, two ends of the bracket along the length direction of the bracket are provided with avoidance holes opposite to the welding holes, and the end of the bracket along the length direction of the bracket is also provided with a threaded hole; the end of the pressing piece can be abutted against the pressing blocks so that the two pressing blocks clamp the battery cell. The welding fixture is simple in structure, low in manufacturing cost, convenient to operate in use, short in manufacturing period, simple to debug and high in efficiency when welding equipment is replaced.

Description

Welding fixture

Technical Field

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

Background

In the manufacturing process of the battery cell, welding the connecting piece on the top cover and the tabs extending from two sides of the core pack is one of the essential and very important procedures. During welding, a welding fixture is generally used for positioning the battery cell, the welding fixture can be placed on matched welding equipment, and then the welding equipment is used for welding the connecting sheet and the tab. The existing welding fixture is complex in structure, high in manufacturing cost, long in manufacturing period, complex in debugging and low in efficiency when welding equipment is replaced.

Accordingly, there is a need to provide a welding fixture that solves the above-mentioned problems.

Disclosure of utility model

The utility model aims to provide a welding fixture which is simple in structure, short in manufacturing period, low in cost and convenient to operate.

In order to achieve the purpose, the utility model is realized by the following technical scheme:

A welding fixture, comprising:

The two pressing blocks are oppositely arranged and used for placing the battery cell, and each pressing block is provided with a welding hole opposite to the connecting sheet;

The support is internally provided with an accommodating space, the two pressing blocks and the battery cell are positioned in the accommodating space, both ends of the support along the length direction of the support are provided with avoidance holes opposite to the welding holes, and the end part of the support along the length direction of the support is also provided with a threaded hole;

and the end part of the pressing piece can be abutted against the pressing blocks so that the two pressing blocks clamp the battery cell.

As an alternative, each press block is provided with two welding holes, and the two welding holes are arranged at intervals along the width direction of the electric core.

As an alternative scheme, the support includes connecting plate and two end plates, two the end plates set up relatively, the connecting plate connect two between the end plates, connecting plate and two the end plates enclose jointly and establish formation accommodation space, dodge the hole with the screw hole all set up in on the end plate.

As an alternative scheme, the threaded holes are formed in the two end plates, each threaded hole is connected with the pressing piece, and each pressing piece can be abutted against the corresponding pressing block on one side so that the two pressing blocks clamp the battery cell; or alternatively

One of the two end plates is provided with a threaded hole, the threaded hole is connected with a pressing piece, and when the pressing piece is abutted against one of the pressing pieces, the other pressing piece is abutted against the end plate on the corresponding side, so that the two pressing pieces clamp the battery cell.

As an alternative scheme, be provided with a plurality of on the end plate the screw hole, a plurality of the screw hole interval sets up, every screw hole is all worn to establish one compress tightly the piece.

As an alternative, at least one connection plate is connected to both sides of the end plate along the width direction of the bracket, so that the bracket is constructed in a ring-shaped frame structure.

As an alternative, the connection plate is detachably connected to the end plate.

As an alternative scheme, every all be equipped with first mounting hole on the end plate, the connecting plate is equipped with the second mounting hole respectively along its length direction's both ends, and the fastener wears to establish in proper order first mounting hole with the second mounting hole, so that will the end plate with the connecting plate is connected.

As an alternative, each end plate is provided with a first groove, and each pressing block can be accommodated in the corresponding first groove.

As an alternative scheme, every briquetting is last all to be equipped with the second recess, the both ends of electric core along its length direction can hold respectively in corresponding in the second recess.

The beneficial effects of the utility model are as follows:

When the welding fixture provided by the utility model is used, the two pressing blocks are respectively placed at the two ends of the battery core along the length direction of the battery core, then the structure formed by splicing the two pressing blocks and the battery core is placed in the accommodating space of the bracket, so that the bracket is in a state of holding the pressing blocks and the battery core, finally the pressing piece is penetrated into the threaded hole at the end part of the bracket, and is abutted against the surface of the pressing blocks by screwing the pressing piece, so that the two pressing blocks clamp the battery core, and the pressing blocks compress and attach the connecting pieces and the lugs at the side surfaces of the battery core, and the splicing of the fixture is completed at the moment. When welding, the welding fixture is vertically placed into the welding equipment, the connecting sheet and the lug at one end are welded through the welding hole, and after one end is welded, the welding fixture is turned over to weld the other end. The welding fixture has the advantages of simple structure, short manufacturing period, lower cost, convenient operation during use and strong compatibility.

Drawings

For a more obvious and understandable description of embodiments of the utility model or solutions according to the prior art, reference will be made to the accompanying drawings, which are used in the description of the embodiments or the prior art and which are examples of the utility model, and from which other drawings can be obtained without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a welding fixture according to an embodiment of the present utility model;

FIG. 2 is a schematic structural view of a briquette according to an embodiment of the present utility model;

FIG. 3 is a schematic view of an end plate according to an embodiment of the present utility model;

Fig. 4 is a schematic structural diagram of a connection board according to an embodiment of the present utility model.

In the figure:

10. A bracket; 11. an end plate; 111. avoidance holes; 112. a threaded hole; 113. a first mounting hole; 114. a first groove; 12. a connecting plate; 121. a second mounting hole; 13. an accommodation space;

20. briquetting; 21. welding holes; 22. a second groove;

30. a battery cell; 31. a top cover; 32. and (5) core packaging.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

As shown in fig. 1, the present embodiment provides a welding fixture for clamping and positioning the battery cell 30. The battery cell 30 is square, the battery cell 30 comprises a top cover 31 and a core package 32, connecting pieces are arranged on two sides of the top cover 31 along the length direction, lugs are arranged on two sides of the core package 32 along the length direction, and after the battery cell 30 is clamped by a welding fixture, the connecting pieces and the lugs are welded by a welding device in a laser mode.

Specifically, as shown in fig. 1, the welding fixture includes a bracket 10, a pressing member (not shown) and two pressing blocks 20, the two pressing blocks 20 are oppositely arranged and are used for placing a battery cell 30 therebetween, the pressing blocks 20 are in contact with two sides of the battery cell 30 along the length direction, each pressing block 20 is provided with a welding hole 21 opposite to the connecting sheet, and the welding holes 21 are used for passing through a laser light path so as to realize laser welding between the connecting sheet and the tab. An accommodating space 13 is formed in the bracket 10, two pressing blocks 20 and the battery cell 30 are both positioned in the accommodating space 13, two ends of the bracket 10 along the length direction of the bracket are provided with avoiding holes 111 opposite to the welding holes 21, the avoiding holes 111 are used for avoiding the positions of the welding holes 21 so as to facilitate welding, and the end part of the bracket 10 along the length direction of the bracket is also provided with threaded holes 112; the pressing piece is in threaded connection with the threaded hole 112, and the end portion of the pressing piece can be abutted against the pressing blocks 20, so that the two pressing blocks 20 clamp the battery cells 30. The pressing member may be a jackscrew, a bolt or other cylinder structure with external threads, which is not particularly limited herein. For convenience of explanation, in fig. 1, the longitudinal direction of the battery cell 30 and the holder 10 is defined as the X direction, and the width direction of the battery cell 30 and the holder 10 is defined as the Y direction.

When the fixture is used, the two pressing blocks 20 are respectively pressed at two ends of the battery cell 30 along the X direction, then the whole structure formed by assembling the two pressing blocks 20 and the battery cell 30 is placed into the accommodating space 13 of the bracket 10, the bracket 10 is in a state of holding the pressing blocks 20 and the battery cell 30, finally the pressing pieces are arranged in the threaded holes 112 at the end parts of the bracket 10 in a penetrating mode, the pressing pieces are abutted against the surfaces of the pressing blocks 20 by screwing, the two pressing blocks 20 clamp the battery cell 30 (the core package 32) together, and the pressing blocks 20 press and attach the connecting pieces and the lugs at the side surfaces of the core package 32, so that the fixture is spliced. During welding, the welding fixture is vertically placed into the welding equipment, the connecting sheet and the lug at one end are welded through the welding hole 21, and after one end is welded, the welding fixture is turned over to weld the other end. The welding fixture is simple in structure, low in manufacturing cost, convenient to operate in use, short in manufacturing period, simple to debug and high in efficiency when welding equipment is replaced.

Preferably, as shown in fig. 1 and 2, two welding holes 21 are provided on each of the pressing blocks 20, and the two welding holes 21 are spaced apart in the width direction of the battery cell 30. It will be appreciated that when welding the connection piece and the tab, it is necessary to weld two sides of the connection piece and the tab in the Y direction, i.e., two welding marks, respectively. Through setting up two welding holes 21, two welding holes 21 can correspond the position of two welding marks respectively to in the welding, and during the welding, partial briquetting 20 between two welding holes 21 can compress tightly connection piece and utmost point ear, make connection piece and utmost point ear's laminating degree good, in order to guarantee welding quality, promote the qualification rate of product.

Referring to fig. 1 and 2, each pressing block 20 is provided with a second groove 22, and two ends of the battery cell 30 along the length direction thereof can be respectively accommodated in the corresponding second grooves 22. By providing the second groove 22, first, when the pressing block 20 and the battery cell 30 are assembled, the second groove 22 can position the placement position of the battery cell 30 so as to quickly assemble the pressing block 20 and the battery cell 30; secondly, after the two pressing blocks 20 clamp the battery cell 30 through the pressing piece, the second groove 22 can limit the movement of the battery cell 30 along the Y direction, so that the limiting effect is achieved, and the stability of clamping the battery cell 30 is ensured.

As shown in fig. 1 and 3, the bracket 10 specifically includes a connecting plate 12 and two end plates 11, the end plates 11 are square plate structures, the connecting plate 12 is a longer square plate structure, the two end plates 11 are oppositely arranged along the X direction, two pressing blocks 20 and a battery cell 30 are placed between the two end plates 11, the connecting plate 12 extends along the X direction and is connected between the two end plates 11, the connecting plate 12 and the two end plates 11 enclose together to form an accommodating space 13, and the avoiding holes 111 and the threaded holes 112 are all arranged on the end plates 11. The bracket 10 has simple overall structure, convenient manufacture and lower manufacturing cost.

Specifically, referring to fig. 1, two connection plates 12 are connected to both sides of the end plate 11 in the width direction (Y direction) of the bracket 10, respectively, so that the bracket 10 is constructed in a ring-shaped frame structure. This arrangement makes the structure of the bracket 10 more stable, simple in structure and low in manufacturing cost. In other embodiments, one, three or more connecting plates 12 may be connected to each side of the end plate 11 along the Y direction, which is flexibly set according to the requirement, and is not limited herein.

Preferably, as shown in fig. 3, each end plate 11 is provided with a first groove 114, and each pressing block 20 can be accommodated in the corresponding first groove 114. By providing the first groove 114, first, when the structure composed of the pressing block 20 and the battery cell 30 is put into the accommodating space 13, the first groove 114 can position the placement position of the pressing block 20; secondly, after the two pressing blocks 20 clamp the battery cell 30 through the pressing piece, the first groove 114 can limit the movement of the pressing blocks 20 along the Y direction, so that the limiting effect is achieved, and the clamping stability is ensured.

In one embodiment, threaded holes 112 are formed in both end plates 11, and each threaded hole 112 is internally connected with a pressing member, and each pressing member can be abutted against the pressing block 20 on the corresponding side, so that the two pressing blocks 20 clamp the battery cell 30. In another embodiment, a threaded hole 112 is formed in one of the two end plates 11, a pressing member is connected to the threaded hole 112, and when the pressing member abuts against one of the pressing blocks 20, the other pressing block 20 abuts against the end plate 11 on the corresponding side, so that the two pressing blocks 20 can clamp the battery cell 30.

Whether all set up screw hole 112 on two end plates 11, still set up screw hole 112 on one of them end plate 11, screw hole 112 quantity on the end plate 11 is provided with a plurality ofly, and a plurality of screw holes 112 interval sets up, and a clamp is worn to establish in every screw hole 112, and a plurality of clamps can support simultaneously to tightly in briquetting 20 on the surface to guarantee that two briquettes 20 can press from both sides tight electric core 30 steadily, whole frock structure is more firm stable.

As shown in fig. 3, the number of the threaded holes 112 on the end plate 11 is four, the four threaded holes 112 are respectively arranged on four sides of the avoidance hole 111, each threaded hole 112 is internally provided with a pressing piece in a penetrating manner, and the four pressing pieces can be simultaneously abutted against the surface of the pressing block 20, so that the pressing block 20 is uniformly stressed and can stably clamp the battery cells 30. In other embodiments, the number of the threaded holes 112 on the end plate 11 may be two, three or more, which is flexibly set according to actual needs, and is not specifically limited herein.

Preferably, the connection plate 12 is detachably connected to the end plate 11. In use, two end plates 11 are first assembled with four connecting plates 12 to form a frame-like support 10. It will be appreciated that the length and width of the battery cells 30 will be different for different models, and in order to adapt the welding fixture to the battery cells 30 of different models, the press block 20 and the connecting plate 12 need only be replaced adaptively according to the length and width of the battery cells 30. Thus, by providing the connection plate 12 and the end plate 11 in a detachable form, replacement of the connection plate 12 can be facilitated to match different types of the battery cells 30.

Specifically, as shown in fig. 1, 3 and 4, in order to realize detachable connection between the connection plate 12 and the end plates 11, each end plate 11 is provided with a first mounting hole 113, two ends of the connection plate 12 along the length direction thereof are respectively provided with a second mounting hole 121, and the fasteners sequentially penetrate through the first mounting holes 113 and the second mounting holes 121 so as to connect the end plates 11 with the connection plate 12, so that the connection is stable and the disassembly and the assembly are convenient. Wherein the fastener may be a bolt or a screw, the first and second mounting holes 113 and 121 are each provided with an internal thread.

As shown in fig. 1, 3 and 4, two second mounting holes 121 are respectively provided at two ends of each connecting plate 12 along the length direction thereof, the first mounting holes 113 and the second mounting holes 121 are provided in one-to-one correspondence, and since four connecting plates 12 are provided between two end plates 11, each end plate 11 is provided with eight first mounting holes 113, and fasteners are respectively inserted into each first mounting hole 113 and the corresponding second mounting hole 121, thereby realizing stable connection between the end plate 11 and the connecting plate 12, and being convenient to assemble and disassemble. In other embodiments, the number of the second mounting holes 121 on each end of the connection plate 12 may be one, three or more, and the first mounting holes 113 may be disposed in one-to-one correspondence with the second mounting holes 121, which is not particularly limited herein.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. A welding fixture, comprising:

The two pressing blocks (20) are oppositely arranged, a battery cell (30) is placed between the two pressing blocks (20), and a welding hole (21) opposite to the connecting sheet is formed in each pressing block (20);

The support (10) is internally provided with an accommodating space (13), two pressing blocks (20) and the battery cells (30) are positioned in the accommodating space (13), two ends of the support (10) along the length direction of the support are respectively provided with an avoidance hole (111) opposite to the welding holes (21), and the end part of the support (10) along the length direction of the support is also provided with a threaded hole (112);

And the end parts of the pressing pieces can be abutted against the pressing blocks (20) so that the two pressing blocks (20) clamp the battery cells (30).

2. Welding fixture according to claim 1, characterized in that two welding holes (21) are provided on each press block (20), the two welding holes (21) being arranged at intervals in the width direction of the battery cell (30).

3. Welding fixture according to claim 1, characterized in that the bracket (10) comprises a connecting plate (12) and two end plates (11), the two end plates (11) are oppositely arranged, the connecting plate (12) is connected between the two end plates (11), the connecting plate (12) and the two end plates (11) jointly enclose to form the accommodating space (13), and the avoidance holes (111) and the threaded holes (112) are both arranged on the end plates (11).

4. A welding fixture according to claim 3, wherein the threaded holes (112) are formed in both end plates (11), the pressing members are connected in each threaded hole (112), and each pressing member can be abutted against the corresponding pressing block (20) on one side so that the two pressing blocks (20) clamp the battery cells (30); or alternatively

One of the two end plates (11) is provided with a threaded hole (112), the threaded hole (112) is connected with the pressing piece, and when the pressing piece is abutted against one of the pressing pieces (20), the other pressing piece (20) is abutted against the end plate (11) on the corresponding side, so that the two pressing pieces (20) clamp the battery cell (30).

5. Welding fixture according to claim 4, characterized in that the end plate (11) is provided with a plurality of threaded holes (112), a plurality of threaded holes (112) are arranged at intervals, and each threaded hole (112) is internally provided with one pressing piece.

6. A welding jig according to claim 3, wherein at least one of the connection plates (12) is connected to both sides of the end plate (11) in the width direction of the bracket (10), respectively, so that the bracket (10) is constructed in a ring-shaped frame structure.

7. Welding fixture according to claim 6, characterized in that the connection plate (12) is detachably connected with the end plate (11).

8. Welding fixture according to claim 7, characterized in that each end plate (11) is provided with a first mounting hole (113), the two ends of the connecting plate (12) along the length direction thereof are respectively provided with a second mounting hole (121), and fasteners sequentially penetrate through the first mounting holes (113) and the second mounting holes (121) to connect the end plates (11) with the connecting plate (12).

9. Welding fixture according to any one of claims 3-8, characterized in that each end plate (11) is provided with a first recess (114), each press block (20) being receivable in a corresponding first recess (114).

10. Welding fixture according to any one of claims 1-8, wherein each press block (20) is provided with a second groove (22), and both ends of the battery cell (30) along the length direction thereof can be respectively accommodated in the corresponding second grooves (22).