Laser Welding Machine of Tabs for Small Lithium Batteries

In a project of a giant company in the battery industry, the customer's requirement is a solution system suitable for laser welding of positive and negative electrode plates and PCBA pads of small lithium batteries.

At the same time, this system can also be applied to the tabs and positive electrodes of the battery core. Negative electrode welding.

The system has high requirements on material compatibility and welding quality. Taking nickel sheet welding as an example, the welding tension requirement is >3.0 KGF and the penetration depth is <0.05mm.

In terms of overall requirements, the overall yield requirement of the welding solution is ≥99.9%, and the power stability requirement is ≤±0.5%.

The specific process requirements are as follows:

✔For 4 welding points arranged in 2×2, the diameter of the solder joints must be between 0.5~0.8mm, and there must be 4 effective weld nuggets remaining after pulling.

✔The solder points must be uniform in size and must have no defects such as explosion, desoldering, weak welding, spot deviation, spot penetration, few welding points, blackened welding points, weak welding points, etc.

✔The welding surface is burr-free and looks good.