动力电池连接片激光焊接虚焊原因分析与改善

Analysis and improvement of laser welding pseudo weld causes of power battery connectors

动力电池连接片虚焊会影响模组的强度和过流,对产品的使用功能造成不良影响。文中从焊接工艺过程分析了连接片虚焊产生的原因,研究了焊接工艺参数对接头熔深的影响。结果表明,在动力电池激光焊接生产环节中,振镜脏污、抽尘速度过小、气体保护气流量过大、连接片有残胶、激光功率衰减、离焦量变化是产生虚焊的主要原因,生产过程需要对以上要素进行有效的管控。

Thepseudo welding of the power battery connection would affect the strength and overcurrent of the module,which would have an adverse effect on the function of the product.In this paper,the reasons of the joint sheet pseudo welding were analyzed from the welding process,and the influence of welding process parameters on the joint penetration is studied.The results showed that in the production of power battery laser welding,the main causes of pseudo welding a were dirty galvanometer,too small dust extraction speed,too large gas protection gas flow,residual glue in the connection sheet,laser power attenuation,and out-of-control defocus.The production process needed to effectively control the above factors.