Compressing and positioning device for laser welding

Abstract

The utility model discloses a laser welding pressing and positioning device. The laser welding pressing and positioning device comprises a pressing block, a plurality of welding windows, a plurality of boss parts and a plurality of positioning parts, wherein the welding windows, the boss parts and the positioning parts are arranged on the pressing block. The multiple welding windows are arranged at intervals and penetrate through the pressing block, and the peripheral sides of the welding windows are of inclined plane structures; the boss part is arranged on one side of the pressing block and arranged on the peripheral side of the welding window in a surrounding mode. The positioning part is used for being connected with a positioning piece in a matched mode so as to position the position of the welding window. According to the utility model, the peripheral side of the welding window is arranged to be of the inclined surface structure, so that the laser welding fume removal efficiency is effectively improved, and the welding mark appearance is improved; by arranging the boss part, the stress area can be effectively reduced, the pressing force is improved, the fitting degree of the battery cell tab and the top cover is ensured, the pseudo soldering rate is reduced, and the welding optimal rate is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, and further relates to a laser welding pressing and positioning device. Background Art

[0002] The welding of the cell tabs and the top cover is a key process in battery assembly. It mainly relies on the clamping device to press and position the cell tabs and the battery top cover. The laser performs laser welding through the welding window of the clamping and positioning device to complete the assembly of the cell tabs and the battery top cover.

[0003] However, the existing clamping and positioning device has low efficiency in exhausting welding fumes during laser welding, which causes the laser weld mark to turn black and the welding appearance to be poor. In addition, the clamping position of the welding window adopts flat clamping, which has a large force area and low clamping force, and can easily cause poor welding between the battery cell ear and the top cover.

[0004] Therefore, it is necessary to design a laser welding clamping and positioning device to solve the above problems. Utility Model Content

[0005] In view of the above technical problems, the purpose of the utility model is to provide a laser welding clamping and positioning device, which effectively improves the laser welding smoke removal efficiency and improves the appearance of the weld mark by setting the surrounding side of the welding window as a slope structure; by setting the boss part, it can effectively reduce the force area, increase the clamping force, ensure the fit between the battery cell ear and the top cover, reduce the false welding rate, and ensure the welding quality rate.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a laser welding clamping and positioning device, including: a pressing block and a plurality of welding windows, a boss portion, and a positioning portion arranged on the pressing block; the plurality of welding windows are arranged at intervals and penetrate the pressing block, and the peripheral side of the welding window is a slope structure; the boss portion is arranged on one side of the pressing block and surrounds the peripheral side of the welding window; the positioning portion is used to adapt and connect with the positioning piece to locate the position of the welding window.

[0007] In some embodiments, the welding window is a square opening, and the welding window includes two oppositely disposed first side walls and two oppositely disposed second side walls, and the two first side walls and the two second side walls are both inclined structures.

[0008] In some embodiments, the first side wall is an inclined surface, and the draft angle of the first side wall is 30°-45°;

[0009] And / or, the second side wall is an inclined surface, and the draft angle of the second side wall is 20°-30°.

[0010] In some embodiments, the first side wall is an inclined curved surface;

[0011] And / or, the second side wall is an inclined arc surface.

[0012] In some embodiments, the length of the welding window is 22 mm-28 mm;

[0013] The width of the welding window is 3mm-5mm.

[0014] In some embodiments, the boss portion is an annular boss, and the annular boss is arranged around the welding window.

[0015] In some embodiments, the annular boss is integrally formed with the pressing block, and the height of the annular boss is 1 mm-1.5 mm.

[0016] In some embodiments, the pressing block has a top surface and a bottom surface, and the boss portion is disposed on the bottom surface;

[0017] The bottom surface is also provided with a plurality of grooves, and the plurality of welding windows are arranged in two rows and multiple columns, and the grooves are respectively provided on both sides of the welding windows in each column.

[0018] In some embodiments, the groove passes through the pressing block along the width direction of the pressing block, and the two side walls of the groove are inclined surfaces;

[0019] The two side walls of the pressing block are inclined surfaces, and the width of the top surface is greater than the width of the bottom surface.

[0020] In some embodiments, the positioning portion includes at least two positioning holes, and the positioning holes are arranged at the bottom of the groove and penetrate the pressing block.

[0021] Compared with the prior art, the laser welding pressing and positioning device provided by the utility model has the following beneficial effects:

[0022] In the utility model, by setting the surrounding side of the welding window as a bevel structure, the laser welding smoke removal efficiency is effectively improved and the appearance of the weld mark is improved; by setting the boss part, the force area can be effectively reduced, the clamping force can be increased, the fit between the battery cell ear and the top cover can be ensured, the false welding rate can be reduced, and the welding quality rate can be ensured; by setting a groove at the bottom of the pressing block and slanting the two sides of the groove, the elasticity of the clamping structure can be improved and deformation can be reduced; the two sides of the bottom of the pressing block are beveled and chamfered to avoid the root of the battery cell ear, prevent the root of the ear from being crushed, and improve the battery cell laser welding yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present utility model.

[0024] Figure 1 It is a structural schematic diagram of a laser welding pressing and positioning device according to a preferred embodiment of the utility model;

[0025] Figure 2 It is a structural schematic diagram of the laser welding pressing and positioning device from another perspective of the preferred embodiment of the utility model;

[0026] Figure 3 It is a partial structural schematic diagram of the boss portion of the preferred embodiment of the utility model.

[0027] Description of Figure Numbers:

[0028] The pressing block 1 , the top surface 11 , the bottom surface 12 , the groove 13 , the groove side wall 131 , the pressing block side wall 14 , the welding window 2 , the first side wall 21 , the second side wall 22 , the boss portion 3 , the positioning portion 4 , and the positioning hole 41 . DETAILED DESCRIPTION

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0030] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0031] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0032] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0033] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0034] In one embodiment, the reference specification Figures 1 to 3 The utility model provides a laser welding clamping and positioning device, comprising: a pressing block 1 and a plurality of welding windows 2, a boss portion 3, and a positioning portion 4 arranged on the pressing block 1; the plurality of welding windows 2 are arranged at intervals and penetrate the pressing block 1, and the surrounding side of the welding window 2 is a slope structure; the boss portion 3 is arranged on one side of the pressing block 1 and surrounds the surrounding side of the welding window 2; the positioning portion 4 is used to be adapted and connected with the positioning piece to position the position of the welding window 2.

[0035] In this embodiment, by setting the surrounding side of the welding window 2 as a bevel structure, the laser welding smoke removal efficiency is effectively improved and the welding mark appearance is improved; by setting the boss portion 3, the force area can be effectively reduced, the clamping force can be increased, the fit between the battery cell ear and the top cover can be ensured, the false welding rate can be reduced, and the welding quality rate can be ensured.

[0036] In one embodiment, the reference specification Figures 1 to 3 The pressing block 1 has a top surface 11 and a bottom surface 12, and the welding window 2 is a square opening. The welding window 2 can also be set to other shapes according to actual needs. The welding window 2 includes two oppositely arranged first side walls 21 and two oppositely arranged second side walls 22, and the two first side walls 21 and the two second side walls 22 are all inclined structures.

[0037] Specifically, refer to the attached manual Figure 1 , the first side wall 21 is an inclined surface, and the draft angle of the first side wall 21 is 30°-45°; such as the draft angle of the first side wall 21 is 31°, 32°, 33°, 34°, 35°, 36°, 37°, 38°, 39°, 40°, 41°, 42°, 43°, 44°, etc. The second side wall 22 is an inclined surface, and the draft angle of the second side wall 22 is 20°-30°. For example, the draft angle of the second side wall 22 is 21°, 22°, 23°, 24°, 25°, 26°, 27°, 28°, 29°, etc. Of course, the first side wall 21 and the second side wall 22 can also be set as inclined arc surfaces, which can also improve the efficiency of welding fume removal. By setting the welding window 2 as an open structure, the efficiency of welding fume removal can be effectively improved, the welding mark can be prevented from blackening, and the appearance of the welding mark can be improved.

[0038] The length of the welding window 2 is 22mm-28mm, such as 23mm, 24mm, 25mm, 26mm, 27mm, etc.; the width of the welding window 2 is 3mm-5mm. Preferably, if the length of the welding window 2 is 25mm and the width of the welding window 2 is 4mm, the welding window of this structure can complete the effective welding of 2mm*21mm.

[0039] Reference Manual Attached Figure 2 , Figure 3 , the boss portion 3 is arranged on the bottom surface 12, and the boss portion 3 is an annular boss, and the annular boss is arranged around the welding window 2. The annular boss is integrally formed with the pressing block 1, and the annular boss and the pressing block 1 can also be fixed by welding. The height of the annular boss is 1mm-1.5mm, such as the height of the annular boss is 1.1mm, 1.2mm, 1.3mm, 1.4mm, etc. The boss portion 3 can also be a plurality of boss segments or raised portions arranged at intervals. By arranging the boss portion 3 around the welding window 2, the force area can be effectively reduced, the clamping force can be increased, the fit between the battery cell ear and the top cover can be ensured, the false welding rate can be reduced, and the welding quality rate can be ensured.

[0040] Further, refer to the attached manual Figure 2 The plurality of welding windows 2 are arranged in two rows and multiple columns, for example, the plurality of welding windows 2 are arranged in two rows and two columns or two rows and three columns, etc. The bottom surface 12 is provided with a plurality of grooves 13, and grooves 13 are respectively provided on both sides of each column of welding windows 2.

[0041] The groove 13 penetrates the pressing block 1 along the width direction of the pressing block 1, and the groove sidewalls 131 on both sides of the groove 13 are inclined surfaces. By arranging the groove 13 at the bottom of the pressing block 1 and arranging the groove 13 at both sides at an inclined manner, the elasticity of the pressing device can be improved and deformation can be reduced.

[0042] The side walls 14 of the pressing block 1 on both sides are inclined surfaces, and the width of the top surface 11 is greater than the width of the bottom surface 12. By chamfering the bottom sides of the pressing block 1, the base of the battery cell tab can be avoided to prevent the base of the tab from being crushed, thereby improving the laser welding yield of the battery cell.

[0043] Further, refer to the attached manual Figure 2 The positioning portion 4 includes at least two positioning holes 41, which are arranged at the bottom of the groove 13 and penetrate the pressing block 1, and the positioning member is a positioning column adapted to the positioning hole 41. Of course, the positioning portion 4 can also be set as a positioning column, and the positioning member is a positioning hole adapted to the positioning column. By setting the positioning portion 4, the accuracy of the welding window 2 and the welding position can be effectively guaranteed.

[0044] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0045] It should be noted that the above embodiments can be freely combined as needed. The above are only preferred implementations of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model.

Claims

1. A laser welding clamping and positioning device, characterized in that: include: A pressing block and a plurality of welding windows, a boss portion, and a positioning portion arranged on the pressing block; A plurality of welding windows are arranged at intervals and penetrate the pressing block, and the peripheral side of the welding window is a slope structure; the boss portion is arranged on one side of the pressing block and surrounds the peripheral side of the welding window; the positioning portion is used to be adapted to be connected with the positioning piece to locate the position of the welding window.

2. The laser welding clamping and positioning device according to claim 1, characterized in that: The welding window is a square opening, and comprises two oppositely disposed first side walls and two oppositely disposed second side walls, and both the two first side walls and the two second side walls are inclined structures.

3. The laser welding clamping and positioning device according to claim 2, characterized in that: The first side wall is an inclined surface, and the draft angle of the first side wall is 30°-45°; And / or, the second side wall is an inclined surface, and the draft angle of the second side wall is 20°-30°.

4. The laser welding clamping and positioning device according to claim 2, characterized in that: The first side wall is an inclined arc surface; And / or, the second side wall is an inclined arc surface.

5. The laser welding clamping and positioning device according to claim 3 or 4, characterized in that: The length of the welding window is 22mm-28mm; The width of the welding window is 3mm-5mm.

6. The laser welding clamping and positioning device according to claim 1, characterized in that: The boss portion is an annular boss, and the annular boss is arranged around the welding window.

7. The laser welding clamping and positioning device according to claim 6, characterized in that: The annular boss is integrally formed with the pressing block, and the height of the annular boss is 1 mm-1.5 mm.

8. The laser welding clamping and positioning device according to claim 1, characterized in that: The pressing block has a top surface and a bottom surface, and the boss portion is arranged on the bottom surface; A plurality of grooves are also arranged on the bottom surface, and the plurality of welding windows are arranged in two rows and multiple columns, and the grooves are respectively arranged on both sides of the welding windows in each column.

9. The laser welding clamping and positioning device according to claim 8, characterized in that: The groove passes through the pressing block along the width direction of the pressing block, and the two side walls of the groove are inclined surfaces; The two side walls of the pressing block are inclined surfaces, and the width of the top surface is greater than the width of the bottom surface.

10. The laser welding pressing and positioning device according to claim 8, characterized in that: The positioning portion includes at least two positioning holes, which are arranged at the bottom of the groove and penetrate the pressing block.

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