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Battery adapter piece welding method

A welding method and adapter technology, which are applied in welding equipment, laser welding equipment, metal processing equipment, etc., can solve the problems of welding spatter, affect battery performance, and easily form virtual welding defects, so as to increase the depth of the molten pool and reduce the melting point. The effect of pool stabilization and splash suppression

Pending Publication Date: 2022-01-25
江苏联赢激光有限公司
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Problems solved by technology

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies, including at least one of the technical problems in the welding of square shell battery adapters using fiber lasers for welding, which leads to the formation of virtual welding defects and welding spatter during the welding process, which in turn affects To solve the technical problems of battery performance, a welding method for battery adapters is provided

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Embodiment Construction

[0035] In order to understand the above-mentioned aspects, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0036] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described here. Therefore, the protection scope of the present invention is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

[0037] Refer below Figure 1 to Figure 3 A welding method of a battery adapter sheet according to some embodiments of the present invention is described.

[0038] Such as figure 1 As shown, the pr...

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Abstract

The invention provides a battery adapter piece welding method which comprises the steps that an adapter piece and a top cover pole of a battery are arranged, and blue laser is output to the surface of the adapter piece through a laser so that the adapter piece and the top cover pole can form a liquid molten pool surface; the laser outputs fiber laser to act on the surface of the liquid molten pool, so that the surface of the liquid molten pool absorbs the fiber laser to form a keyhole; and a laser emitting unit of the laser is driven by a moving shaft to move to form a welding track, so that the adapter piece is welded to the top cover pole, and the adapter piece is made of copper. The blue laser and the optical fiber laser are adopted in a welding mode, so that the overall laser utilization rate is high, adapter piece laser welding application can be completed with low total power, the cold joint problem is not prone to occurring, welding is free of splashing, the overcurrent capacity of a welding seam is guaranteed, and the product performance of the square shell battery is greatly improved.

Description

technical field [0001] The invention relates to the field of new energy battery production, in particular to a welding method for battery adapters. Background technique [0002] In the field of new energy battery production, the welding of the adapter piece is an essential process. Its function is to connect the top cover pole of the square shell battery and the internal battery tab of the battery to form a current conduction. The current welding schemes all use fiber lasers, the laser band is 1030nm~1090nm, and the battery negative electrode adapter is made of copper. The copper material has a very low absorption rate for this band, and the heat dissipation is very fast, so a very high power density is required for deep melting. Welding requires extremely high equipment power during the application process, and it is also easy to cause false welding due to slight changes in defocus. At the same time, due to the significant increase in the absorption rate of copper for fi...

Claims

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Application Information

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IPC IPC(8): B23K26/24
CPCB23K26/24
Inventor 谭浩沈成详周航万磊牛增强韩金龙
Owner 江苏联赢激光有限公司
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