Positioning mechanism for laser welding of connecting piece

Abstract

The utility model relates to the technical field of batteries, in particular to a positioning mechanism for laser welding of a connecting piece, which comprises a positioning part, and the positioning part comprises a top cover positioning part for positioning a top cover and two core bag positioning parts which are arranged on two sides of the top cover positioning part and are used for positioning a core bag; the lithium ion battery further comprises a pressing part, and the pressing part is arranged above the connecting sheet and the tab of the core package so as to apply pressure to the connecting sheet and the tab for fixation; the laser welding device can position the positions of all the parts to be welded, two connecting piece laser welding procedures can be carried out synchronously, the equipment cost is saved, and the battery manufacturing efficiency and quality are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially, is connected with a kind of positioning mechanism for laser welding of tab. BACKGROUND

[0002] The existing large energy storage battery structure needs to use laser welding process, first, the tab of the core package is welded with the connecting sheet, and then the connecting sheet is welded with the top cover. For example, the utility model patent with publication number CN209773732U provides a kind of electric core connecting sheet welding mechanism, for welding the connecting sheet to the pole of battery top cover, comprising: welding table, laser welding assembly, dust cover;Wherein, dust cover includes electric core containing room, welding chamber;Welding chamber is provided with air inlet and air outlet, air inlet is equipped with the air pipe that communicates welding chamber, air outlet is equipped with the air pipe that communicates welding chamber.

[0003] However, such welding mechanism is only suitable for the core package that has completed the welding of tab and connecting sheet, and the connecting sheet and the top cover are welded for the second time, that is, the connecting sheet laser welding in the prior art is divided into two processes, the tab of the core package and the connecting sheet must be placed in a set of positioning mechanism first, and then the connecting sheet is welded, and then the core package with the connecting sheet is placed in another set of positioning mechanism for positioning welding. Therefore, the existing connecting sheet laser welding needs to be equipped with two laser welding devices to sequentially carry out two welding processes, which has the problems of high equipment investment cost and low welding efficiency. UTILITY MODEL CONTENT

[0004] To solve the problems in the prior art, the utility model provides a positioning mechanism for connecting sheet laser welding, which can position each component to be welded for two laser welding processes to be carried out synchronously, save equipment cost, and improve battery manufacturing efficiency and quality.

[0005] The technical scheme for solving the problem of the utility model provides a positioning mechanism for connecting sheet laser welding, which includes a positioning part, the positioning part includes a top cover positioning part for positioning the top cover, and two core package positioning parts arranged on both sides of the top cover positioning part for positioning the core package;It also includes a pressing part, the pressing part is arranged above the connecting sheet and the tab of the core package to apply pressure to the connecting sheet and the tab for fixation.

[0006] Further, the positioning mechanism for connecting sheet laser welding provided by the utility model can also have the following features: the edge of the core package positioning part is provided with a stop edge for limiting the position of the core package.

[0007] Further, the positioning mechanism for laser welding of connecting pieces provided by the utility model can also have the following features: the top cover positioning part is provided with a first profiling positioning groove for accommodating the pole of the top cover.

[0008] Further, the positioning mechanism for laser welding of connecting pieces provided by the utility model can also have the following features: the positioning mechanism further comprises a plurality of heat insulation parts for preventing the connecting pieces from melting the top cover due to laser penetration, and the heat insulation parts are arranged between the connecting pieces and the top cover.

[0009] Further, the positioning mechanism for laser welding of connecting pieces provided by the utility model can also have the following features: the heat insulation part comprises an abutting piece for positioning the position of the heat insulation part, the top cover comprises a welding part for welding connection with the connecting piece, one side of the abutting piece is in abutment with the welding part, and the other side is in abutment with the core package.

[0010] Further, the positioning mechanism for laser welding of connecting pieces provided by the utility model can also have the following features: the heat insulation part is provided with a second profiling positioning groove for accommodating the connecting piece, and the two sides of the connecting piece are connected with the two second profiling positioning grooves respectively.

[0011] Further, the positioning mechanism for laser welding of connecting pieces provided by the utility model can also have the following features: the end of the abutting piece forms a handle for holding by hand to take out the heat insulation part after welding is completed.

[0012] Further, the positioning mechanism for laser welding of connecting pieces provided by the utility model can also have the following features: the pressing part comprises at least one pressing block, and the pressing block is provided with an air inlet hole for connecting to protective gas.

[0013] Further, the positioning mechanism for laser welding of connecting pieces provided by the utility model can also have the following features: the pressing part is provided with a welding avoidance groove for guiding the welding workpiece.

[0014] Further, the positioning mechanism for laser welding of connecting pieces provided by the utility model can also have the following features: the top cover positioning part and the core package positioning part are detachably connected.

[0015] The utility model has the advantages of:

[0016] The positioning mechanism provided by the application can simultaneously position the top cover, the core package and the connecting sheet, thereby ensuring that the connecting sheet, the pole lug of the core package and the top cover can be synchronously welded when laser welding is performed on the connecting sheet, without the need of two welding devices to perform two welding procedures, saving equipment cost and improving welding efficiency. Moreover, since the positioning mechanism provided by the application ensures that the connecting sheet welding only needs one-time positioning clamping, compared with two-time positioning clamping, the error is reduced by half, which is more beneficial to the consistency of battery manufacturing. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate embodiments of the present application and, together with the description, serve to explain the principles of the present application. In the drawings:

[0018] Figure 1 is a structural schematic view of the present application;

[0019] Figure 2 is an exploded view of the present application;

[0020] Figure 3 is a partial schematic view of the battery cell of the present application;

[0021] Figure 4 is a structural schematic view of the heat insulation part of the present application;

[0022] Figure 5 is a structural schematic view of the pressing block of the present application.

[0023] In the drawings:

[0024] 1, positioning part; 11, top cover positioning part; 111, first profiling positioning groove; 12, core package positioning part; 121, baffle; 2, pressing part; 21, pressing plate; 22, pressing block; 221, air inlet hole; 222, welding avoidance groove; 3, heat insulation part; 31, abutting member; 32, second profiling positioning groove; 33, handle; 4, core package; 41, pole lug; 5, connecting sheet; 6, top cover; 61, welding part; 7, buckle seat; 8, buckle. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0026] The utility model provides a kind of positioning mechanism for connecting piece laser welding, specific structure is as follows:

[0027] As Figure 1 And Figure 2 Indicated, the positioning mechanism for connecting piece 5 laser welding includes positioning part 1, positioning part 1 includes the top cap positioning part 11 for positioning top cap 6, and two for positioning core package 4 The core package positioning part 12 for being arranged in the top cap positioning part 11 both sides. As Figure 2 And Figure 3 Indicated, when welding connection, connecting piece 5 is located above top cap 6, and the lug 41 of core package 4 is located above connecting piece 5. Based on this, positioning mechanism further includes pressing part 2, and pressing part 2 is arranged above connecting piece 5 and the lug 41 of core package 4, to exert pressure on connecting piece 5 and lug 41 and be fixed. To facilitate the placement of each component to be welded, two buckle seats 7 are respectively arranged at the both ends of positioning part 1, and two corresponding buckles 8 are arranged on pressing part 2, and pressing part 2 and positioning part 1 are detachably connected by the connection of buckle seat 7 and buckle 8. In use, the positioning mechanism provided by the utility model can simultaneously position top cap 6, core package 4 and connecting piece 5, so as to ensure that the lug 41 of core package 4 and connecting piece 5 and top cap 6 can be simultaneously welded when connecting piece 5 is laser welded, without two welding equipment for two welding processes, saving equipment cost and improving welding efficiency. Moreover, since the positioning mechanism provided by the utility model ensures that connecting piece 5 welding only needs one-time positioning clamping, the error is reduced by half compared with two-time positioning clamping, which is more conducive to the consistency of battery manufacturing.

[0028] As Figure 2 Indicated, the edge of core package positioning part 12 is provided with a stop edge 121 for limiting the position of core package 4, and the position of core package 4 can be positioned by limiting the movement of core package 4 through stop edge 121. The first profiling positioning groove 111 for accommodating the pole of top cap 6 is arranged on the top cap positioning part 11, and the number of first profiling positioning groove 111 corresponds to the number of poles.

[0029] As Figures 2 to 4As shown, the positioning mechanism further comprises several heat insulation parts 3 for preventing the laser from penetrating the connecting piece 5 and melting the top cover 6, which are arranged between the connecting piece 5 and the top cover 6, and preferably made of high-hard mold steel, so as to effectively insulate the heat generated during laser welding, avoid the laser from penetrating the connecting piece 5 and melting the plastic under the top cover 6, and further preferably coated with an insulating plastic layer on the surface, so as to avoid the short circuit of the positive and negative electrodes.

[0030] As shown in Figure 3 and Figure 4 , the heat insulation part 3 comprises an abutting piece 31 for positioning the position thereof, and the top cover 6 comprises a welding part 61 for welding connection with the connecting piece 5, one side of the abutting piece 31 abuts against the welding part 61, and the other side abuts against the core wrap 4. This design enables the heat insulation part 3 to be positioned by the welding part 61 of the top cover 6 and the shape of the core wrap 4 during installation. The heat insulation part 3 is further provided with a second profiled positioning groove 32 for positioning the connecting piece 5, and the two sides of the connecting piece 5 are connected with the two second profiled positioning grooves 32, respectively.

[0031] Further, since the heat insulation part 3 needs to be removed after welding, the end of the abutting piece 31 is formed as a handle 33 for holding by hand to remove the heat insulation part 3 after welding. For the convenience of holding by hand, as shown in Figure 3 , the abutting piece 31 is slightly longer than the welding part 61, so as to ensure that the handle 33 is located outside the welding part 61.

[0032] As shown in Figure 2 and Figure 5 , the pressing part 2 comprises a pressing plate 21 and at least one pressing block 22 arranged below the pressing plate 21. The number of the pressing blocks 22 depends on the number of laser welding marks, and the pressing plate 21 is used for pressing the plurality of pressing blocks 22 and is provided with a buckle 8 for detachable connection with the positioning part 1, so as to ensure the fixation of the pressing part 2 to the tab 41 and the connecting piece 5. The pressing block 22 is provided with an air inlet hole 221 for connecting the protective gas, so that each welding mark can be protected by the gas during welding, thereby ensuring the welding quality. Further, the pressing part 2 is provided with a welding avoidance groove 222 for guiding the welding workpiece.

[0033] For the convenience of switching the positioning part 1 as required, the top cover positioning part 11 and the core wrap positioning part 12 are detachably connected by screws.

[0034] The above-described content can be implemented individually or in various combinations, and these variants are within the protection scope of the present utility model.

[0035] In the description of the present application, it should be noted that the relational terms such as first and second and the like are used solely to distinguish one from another entity or action, without necessarily requiring or implying that there is any such relationship or order between such entities or actions. Also, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises... a" does not, without more limitations, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0036] In the description of the present application, it should also be noted that the terms "center", "upper", "lower", "front", "rear", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise stated, the meaning of "several" is two or more.

[0037] The above is a further detailed description of the present application in conjunction with specific preferred embodiments, and cannot be considered as limiting the specific embodiments of the present application to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, which should be considered as falling within the protection scope of the present application.

Claims

1. A positioning mechanism for laser welding of a connecting tab (5), characterized in that, The positioning mechanism comprises a positioning part (1), the positioning part (1) comprises a top cover positioning part (11) for positioning a top cover (6), and two core bag positioning parts (12) on both sides of the top cover positioning part (11) for positioning a core bag (4); the positioning mechanism further comprises a pressing part, the pressing part is arranged above the connecting sheet (5) and the tab (41) of the core bag (4) to apply pressure to the connecting sheet (5) and the tab (41) for fixation.

2. The positioning mechanism for laser welding of a web (5) according to claim 1, characterized in that, An edge of the core bag positioning part (12) is provided with a stop edge (121) for limiting the position of the core bag (4).

3. The positioning mechanism for laser welding of the connecting tabs (5) according to claim 1, characterized in that, The top cover positioning part (11) is provided with a first profiling positioning groove (111) for accommodating the pole of the top cover (6).

4. The positioning mechanism for laser welding of the connecting tabs (5) according to claim 1, characterized in that, Further comprising a plurality of heat insulation parts (3) for preventing the laser from penetrating the connecting sheet (5) and melting the top cover (6), the heat insulation part (3) is arranged between the connecting sheet (5) and the top cover (6).

5. The positioning mechanism for laser welding of a web (5) according to claim 4, characterized in that, The heat insulation part (3) comprises an abutting piece (31) for positioning the position of itself, the top cover (6) comprises a welding part (61) for welding connection with the connecting sheet (5), one side of the abutting piece (31) abuts with the welding part (61), and the other side abuts with the core bag (4).

6. The positioning mechanism for laser welding of a web (5) according to claim 4, characterized in that, The heat insulation part (3) is provided with a second profiling positioning groove (32) for positioning the connecting sheet (5), and the two sides of the connecting sheet (5) are connected with two second profiling positioning grooves (32) respectively.

7. The positioning mechanism for laser welding of the connecting tabs (5) according to claim 5, characterized in that, The end of the abutting piece (31) forms a handle (33) for holding after welding is completed to take out the heat insulation part (3).

8. The positioning mechanism for laser welding of a web (5) according to claim 1, characterized in that, The pressing part (2) comprises at least one pressing block (21), and the pressing block (21) is provided with an air inlet hole (221) for connecting to protective gas.

9. The positioning mechanism for laser welding of a web (5) according to claim 1, characterized in that, The pressing part (2) is provided with a welding avoidance groove (222) for guiding the welding workpiece.

10. The positioning mechanism for laser welding of a web (5) according to claim 1, characterized in that, The top cover positioning part (11) and the core bag positioning part (12) can be detachably connected.

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