针对电池连接片紫铜的焊接, 分别采用脉冲激光和连续光纤激光进行焊接实验。对脉冲激光焊接的工艺参数峰值功率、脉宽、离焦量进行正交实验, 得到最大的剪切力28 N。对连续光纤激光焊接的工艺参数激光功率、焊接速度、离焦量进行正交实验, 得到最大的剪切力58 N。对焊点外观分析, 结果表明脉冲激光焊缝内部有气孔产生, 连续光纤激光焊缝内部无气孔, 这有利于提高焊点的剪切力。

For the welding of copper in battery connector, pulse laser and continuous fiber laser were used to laser welding testing.For pulse laser, process parameters of peak power, pulse width and focal distances were carried to orthogonal experiments, and obtained maximum shear force of 28N.For continuous fiber laser, process parameters of power、welding speed and focal distances were carried to orthogonal experiments, and obtained maximum shear force of 58N.The appearance of spots showed that welds inner of welded by pulse existed pore. Oppositely, welds inner of welded by continuous fiber laser bad no pore,which was useful for improving the shear force.