Bead-on-plate welding of pure copper with a blue-IR hybrid laser was conducted to achieve a spatter suppression in deep penetration welding of pure copper for the performance improvement of battery and power device of e-mobility. This hybrid laser combines an infrared (IR) laser and a blue diode laser as the welding source and preheating source, respectively. Preheating increases the light absorptivity of pure copper in the IR region. A 1.5-kW blue diode laser was employed to increase the light absorptivity by changing the phase of the preheated area from solid phase to liquid and gas phase. By experimentally investigating the influence of the blue diode laser intensity, the phase effects of the preheated area on pure copper welding with a blue-IR hybrid laser are elucidated. As a result, it was found that a liquid preheated area minimizes spatter during deep penetration welding.

采用蓝光-红外混合激光器进行纯铜焊珠对板焊接，以实现纯铜深熔焊接中的飞溅抑制，从而提高电动汽车电池和功率器件的性能。这种混合激光器结合了红外 (IR) 激光器和蓝色二极管激光器，分别作为焊接源和预热源。预热增加了纯铜在红外区域的光吸收率。采用 1.5 kW 蓝色二极管激光器，通过将预热区域的相从固相改变为液相和气相来增加光吸收率。通过实验研究蓝色二极管激光强度的影响，阐明了预热区域对蓝色-红外混合激光纯铜焊接的相位影响。结果发现，液体预热区域可以最大限度地减少深熔焊过程中的飞溅。