二次电池，尤其是无毒、无污染的绿色二次电池，在全球有很大的需求。在其制造过程中，为了保障生产速度、质量以及产品的一致性，必须配备自动化程度很高的流水作业生产线。其中电池的外壳密封、电池正极的焊接以及安全阀的制作等多道工序均需使用激光焊接技术，因而在二次电池制造过程中的各种激光自动焊接技术也应运而生。总结了目前国内外多种电池激光自动焊接技术的原理、研究进展、工艺方法以及关键部件的软硬件设计，并指出了一些目前存在待解决的问题，讨论了今后需要改进和发展的方向。

Nowadays, there is a great demand for rechargeable battery in the world, especially for the innocuousness and nonpollution ones. In process of manufacture, the automatic production line is used to ensure the productive tempo, the first-rate quality and consistency. And in the automatic production, the battery case, the electric terminal and the relief valve etc are welded by laser. So the battery laser auto welding technologies emerge as the times require. We make a summary of welding theories, research findings, techniques and the software and hardware design for the critical component in this article. We explain some questions that should be solved in the end, and give the developing direction for the future.