Novel lithium battery laser welding jig

Abstract

The utility model relates to a novel lithium battery laser welding jig which comprises a base, a plurality of fixing pieces and a connecting piece, the base is provided with a plurality of welding positions used for placing the fixing pieces, kidney-shaped holes are formed in the two ends of the fixing pieces in the length direction, positioning holes are formed in the welding positions corresponding to the kidney-shaped holes, and the connecting piece is arranged on the base. The connecting piece penetrates through the kidney-shaped hole and extends into the positioning hole, a gap is formed between the fixing piece and the inner circumferential face of the welding position, and the fixing piece can move in the extending direction of the kidney-shaped hole. The welding device is simple and reasonable in structure and capable of adjusting the positioning position and improving the welding quality and the welding efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of battery processing, specifically, a novel lithium battery laser welding fixture. BACKGROUND

[0002] With the increasing application of lithium batteries in energy storage and other industries, the manufacturing process technology requirements for lithium battery packs are becoming higher and higher. The welding technology of lithium battery pack is the most important link in manufacturing, and the quality of welding directly determines the use effect and service life of lithium battery pack. The current welding method on the market is usually to first fix the connecting piece through the clamp positioning, and then melt and connect the cell tab and the connecting piece together by the laser equipment.

[0003] The positioning structure of the existing clamp cannot be adjusted, and the box for placing the cell of the existing clamp is determined by the sheet metal process characteristics, so the tolerance of the outer dimension is large, and the consistency of the outer dimension of the lithium battery pack after assembly is poor. At the same time, due to factors such as the manufacturing process of the cell and the storage time, the consistency of the outer dimension of the battery pack is poor, which leads to the problems of virtual welding, offset, and uneven weld of the welding point. SUMMARY

[0004] The utility model aims at providing a novel lithium battery laser welding fixture, which has a simple and reasonable structure, can adjust the positioning position, and improve the welding quality and welding efficiency.

[0005] A novel lithium battery laser welding fixture, comprising a base, a plurality of fixing pieces, and a connecting piece, the base is provided with a plurality of welding positions for placing the fixing pieces, the two ends of the length direction of the fixing piece are provided with a waist-shaped hole, the welding position corresponding to the waist-shaped hole is provided with a positioning hole, the connecting piece passes through the waist-shaped hole and extends into the positioning hole, there is a gap between the fixing piece and the inner periphery of the welding position, and the fixing piece can move along the extension direction of the waist-shaped hole.

[0006] In the above technical solution, by setting the waist-shaped hole on the fixing piece, and having a gap between the fixing piece and the inner periphery of the welding position, the fixing piece can move along the extension direction of the waist-shaped hole, so as to fine-tune the position of the fixing piece, so that the fixing structure can adapt to the tolerance of the cell size and the box sheet metal, improve the consistency of welding, and further improve the product quality. The fixing piece is detachably connected with the base through the connecting piece, when installing, only need to pass the connecting piece through the waist-shaped hole and insert it into the positioning hole, so as to realize the connection between the fixing piece and the base, the structure is simple, easy to operate, and can improve the welding efficiency.

[0007] As one of the implementation manners, the base is provided with a positioning groove, the positioning groove is provided with a plurality of partitions, and the partitions divide the positioning groove to form a plurality of welding positions.

[0008] In the above technical solution, the base is provided with a positioning groove, the positioning groove is formed with a plurality of welding positions through a partition plate, the structure is compact, which is beneficial to save space and ensure that the fixing pieces can be arranged in order along the width direction, thereby improving the installation efficiency.

[0009] Further, the fixing pieces are arranged along the width direction of the positioning groove, and the waist-shaped holes extend along the width direction of the fixing pieces.

[0010] In the above technical solution, the fixing pieces can be slightly moved along the width direction, so as to adjust the distance between two adjacent fixing pieces, make the fixing pieces more accurately aligned with the battery cells, and improve the welding quality.

[0011] Further, the welding positions are provided with bosses at both ends in the length direction of the fixing pieces, and the positioning holes are arranged on the bosses.

[0012] In the above technical solution, the bosses can support the fixing pieces and provide connection positions for the connecting pieces.

[0013] As another embodiment, the base is provided with a positioning groove, the positioning groove is provided with a plurality of supporting parts, and the supporting parts separate the positioning groove to form a plurality of welding positions arranged along the length direction.

[0014] In the above technical solution, the base is provided with a positioning groove, the positioning groove is formed with a plurality of welding positions through a partition plate, the structure is compact, which is beneficial to save space and ensure that the fixing pieces can be arranged in order along the width direction, thereby improving the installation efficiency.

[0015] Further, the fixing pieces are arranged along the width direction of the positioning groove, and the waist-shaped holes extend along the width direction of the fixing pieces.

[0016] In the above technical solution, the waist-shaped holes extend along the width direction of the fixing pieces, so that the fixing pieces can be slightly moved along the width direction, thereby adjusting the distance between two adjacent fixing pieces, making the fixing pieces more accurately aligned with the battery cells, and improving the welding quality.

[0017] As another embodiment, the welding positions are independent of each other, and the fixing pieces are arranged one by one in the welding positions.

[0018] In the above technical solution, the welding positions are independent of each other, which can facilitate the adjustment of the corresponding fixing pieces.

[0019] Further, the waist-shaped holes extend along the length direction or the width direction of the fixing pieces.

[0020] In the above technical solution, since the welding positions are independently arranged, the waist-shaped holes can be arranged to extend along the length direction or the width direction of the fixing pieces according to the needs, thereby meeting the needs of different adjustment modes.

[0021] Furthermore, the base is provided with several anti-foolproof components, including an anti-foolproof block, a magnetic component located at one end of the anti-foolproof block, and a threaded connector detachably located at the other end of the anti-foolproof block.

[0022] In the above technical solution, by setting up a foolproof component, it is possible to prevent mistakes in the base and connecting piece, thus avoiding incorrect or missed operations.

[0023] Furthermore, the connector is a screw or a pin.

[0024] Compared with existing technologies, the advantages of this utility model are as follows: By setting an oblong hole on the fixing plate, and having a gap between the fixing plate and the inner circumferential surface of the welding position, the fixing plate can move along the extension direction of the oblong hole, thereby fine-tuning the position of the fixing plate. This allows the fixing structure to adapt to the tolerances of the battery cell size and the sheet metal of the housing, improving welding consistency and thus improving product quality. The fixing plate is detachably connected to the base via a connector. During installation, simply pass the connector through the oblong hole and insert it into the positioning hole to connect the fixing plate to the base. The structure is simple, easy to operate, and improves welding efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a novel lithium battery laser welding fixture according to an embodiment of the present invention.

[0026] Figure 2 This is an exploded structural diagram of the novel lithium battery laser welding fixture according to an embodiment of the present invention.

[0027] Figure 3 for Figure 2 A magnified view of part A in the diagram.

[0028] Figure 4 This is a schematic diagram of the structure of the first embodiment of the present utility model.

[0029] Figure 5 This is a schematic diagram of the structure of the second embodiment of the present utility model.

[0030] Figure 6 This is a structural schematic diagram of the third embodiment of the present utility model.

[0031] Explanation of icon numbers:

[0032] Base 1, positioning groove 11, partition 12, boss 13, support part 14, positioning hole 15, welding position 16, fixing piece 2, waist-shaped hole 21, foolproof component 3, foolproof block 31, magnetic part 32, threaded connector 33. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0035] Please refer to Figures 1 to 3 In a preferred embodiment, the novel lithium battery laser welding fixture of this utility model includes a base 1, a plurality of fixing plates 2, and a connector. The base 1 is provided with a plurality of welding positions 16 for placing the fixing plates 2. The two ends of the fixing plates 2 in the length direction are provided with waist-shaped holes 21. The welding positions 16 are provided with positioning holes 15 corresponding to the waist-shaped holes 21. The connector passes through the waist-shaped holes 21 and extends into the positioning holes 15. There is a gap between the fixing plates 2 and the inner circumferential surfaces of the welding positions 16. The fixing plates 2 can move along the extension direction of the waist-shaped holes 21.

[0036] For example, the welding position 16 is used to place and fix the connecting piece. The shape of the welding position 16 is the same as that of the fixing piece 2, and its size is slightly smaller than that of the fixing piece 2, so that there is a gap between the fixing piece 2 and the inner circumferential surface of the welding position 16. The oblong hole 21 of the fixing piece 2 can be set to extend along the length or width direction of the fixing piece 2, so as to meet the needs of different adjustment directions. The connector can be a screw or a pin. The connector passes through the oblong hole 21 and is inserted into the positioning hole 15 to realize the connection between the fixing piece 2 and the base 1. When disassembling, the connector is removed to separate the fixing piece 2 from the base 1. The structure is simple, easy to operate, and can improve welding efficiency.

[0037] By setting an oblong hole 21 on the fixing plate 2, and having a gap between the fixing plate 2 and the inner circumferential surface of the welding position 16, the fixing plate 2 can move along the extension direction of the oblong hole 21, thereby fine-tuning the position of the fixing plate 2, so that the fixing structure can adapt to the tolerance of the battery cell size and the sheet metal of the box, improve the consistency of welding, and thus improve the product quality.

[0038] Please refer to Figure 4In the first embodiment of this utility model, the base 1 is provided with a positioning groove 11, and the positioning groove 11 is provided with a plurality of partitions 12, which divide the positioning groove 11 into a plurality of welding positions 16. The fixing pieces 2 are arranged in the positioning groove 11 along their width direction, and the waist-shaped holes 21 extend along the width direction of the fixing pieces 2.

[0039] For example, the partitions 12 are arranged in parallel with the positioning grooves 11, thereby dividing the positioning grooves 11 into multiple welding positions 16. The partitions 12 and the positioning grooves 11 cooperate to form a space for placing the connecting pieces. The distance between two adjacent partitions 12 and the distance between the partitions 12 and the inner wall of the opposite positioning groove 11 are slightly greater than the width of the fixing pieces 2. The fixing pieces 2 are arranged in the positioning grooves 11 along their width direction. The waist-shaped hole 21 extends along the width direction of the fixing pieces 2, so that the fixing pieces 2 can move slightly along their width direction, thereby adjusting the distance between two adjacent fixing pieces 2, making the alignment of the fixing pieces 2 and the battery cell more accurate and improving the welding quality.

[0040] In this embodiment, the fixing piece 2 can be arranged along its width direction. The base 1 is provided with a positioning groove 11. The positioning groove 11 forms multiple welding positions 16 through the partition 12. The structure is compact, which helps to save space and ensures that the fixing piece 2 can be arranged in an orderly manner along the width direction, thereby improving installation efficiency.

[0041] In this embodiment, the welding position 16 has bosses 13 at both ends of the fixing piece 2 along its length, and positioning holes 15 are provided on the bosses 13. The bosses 13 can support the fixing piece 2 and provide connection positions for the connectors.

[0042] Please refer to Figure 5 The second embodiment of this utility model differs from the first embodiment in that the base 1 is provided with a positioning groove 11, and the positioning groove 11 is provided with a plurality of support parts 14. The support parts 14 divide the positioning groove 11 into a plurality of welding positions 16 arranged along the length direction. The fixing piece 2 is arranged in the positioning groove 11 along its length direction, and the waist-shaped hole 21 extends along the width direction of the fixing piece 2.

[0043] This embodiment enables the fixing plates 2 to be arranged sequentially along the length direction, and the waist-shaped hole 21 to extend along the width direction of the fixing plate 2, so that the fixing plate 2 can move slightly along its width direction, thereby adjusting the distance between two adjacent fixing plates 2, making the alignment of the fixing plate 2 with the battery cell more accurate and improving the welding quality.

[0044] It should be noted that, in this embodiment, the positioning holes 15 can be provided on both sides of the support portion 14, so as to satisfy the requirement that the fixing pieces 2 are connected and fixed sequentially along the length direction.

[0045] Please refer to Figure 6In the third embodiment of this utility model, the welding positions 16 are independent of each other, and the fixing pieces 2 are correspondingly provided at each welding position 16. The welding positions 16 in this embodiment are independent structures, which facilitates individual adjustment of the corresponding fixing pieces 2. In this embodiment, the oblong hole 21 extends along the length or width direction of the fixing piece 2. Since the welding positions 16 are independently set, the oblong hole 21 can be configured to extend along the length or width direction of the fixing piece 2 as needed, thereby meeting the requirements of different adjustment methods.

[0046] It should be noted that, in specific implementations, the welding positions 16 of the above three embodiments can be arranged on the same base 1, thereby meeting different welding requirements with a single base 1. Of course, the above three embodiments can also be combined in different ways according to actual needs, which is not limited here.

[0047] In the above embodiment, the base 1 is provided with a plurality of anti-mistake components 3. The anti-mistake components 3 include an anti-mistake block 31, a magnetic element 32 disposed at one end of the anti-mistake block 31, and a threaded connector 333 detachably disposed at the other end of the anti-mistake block 31. The magnetic element 32 can be a magnet, and the threaded connector 333 can be a wing screw. By setting the anti-mistake components 3, the base 1 and the connecting piece can be prevented from making mistakes, avoiding incorrect or missed operations.

[0048] In the description of this utility model, it should be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0049] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0050] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel laser welding jig for lithium batteries, characterized by, The base is provided with a plurality of welding sites for placing the fixing pieces, the two ends of the fixing pieces in length direction are provided with waist-shaped holes, the welding sites are provided with positioning holes corresponding to the waist-shaped holes, the connecting pieces pass through the waist-shaped holes and extend into the positioning holes, the fixing pieces and the inner circumferential surface of the welding sites have gaps, and the fixing pieces can move along the extension direction of the waist-shaped holes.

2. The novel lithium battery laser welding fixture of claim 1, wherein, The base is provided with a positioning groove, the positioning groove is provided with a plurality of partitions, and the partitions separate the positioning groove to form a plurality of welding sites.

3. The novel lithium battery laser welding fixture of claim 2, wherein, The fixing pieces are arranged along the width direction of the positioning groove, and the waist-shaped holes extend along the width direction of the fixing pieces.

4. The novel lithium battery laser welding fixture of claim 3, wherein, The welding sites are provided with bosses corresponding to the two ends of the fixing pieces in length direction, and the positioning holes are arranged on the bosses.

5. The novel lithium battery laser welding fixture of claim 1, wherein, The base is provided with a positioning groove, the positioning groove is provided with a plurality of support parts, and the support parts separate the positioning groove to form a plurality of welding sites arranged along the length direction.

6. The novel lithium battery laser welding fixture of claim 5, wherein, The fixing pieces are arranged along the length direction of the positioning groove, and the waist-shaped holes extend along the width direction of the fixing pieces.

7. The novel lithium battery laser welding fixture of claim 1, wherein, The welding sites are independent of each other, and the fixing pieces are arranged one-to-one in the welding sites.

8. The novel lithium battery laser welding fixture of claim 7, wherein, The waist-shaped holes extend along the length direction or the width direction of the fixing pieces.

9. The novel lithium battery laser welding fixture of claim 1, wherein, The base is provided with a plurality of fool-proof components, the fool-proof components include fool-proof blocks, magnetic parts arranged at one end of the fool-proof blocks, and threaded connecting pieces detachably arranged at the other end of the fool-proof blocks.

10. The novel lithium battery laser welding fixture of claim 1, wherein, The connecting pieces are screws or bolts.

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