电动汽车电池极耳镀镍铜箔激光焊接研究  

Laser Welding of Nickel-plated Copper Foil for Electric Vehicle Battery Lug

作　　者：王超[1] 马建伟[1] WangChao;Ma Jianwei(Xingtai Polytechnic College)

机构地区：[1]邢台职业技术学院

出　　处：《特种铸造及有色合金》2021年第10期1228-1231,共4页Special Casting & Nonferrous Alloys

基　　金：河北省青年基金资助项目(QN2019205)。

摘　　要：研究了蓝光激光器(波长为450 nm)对多层镀镍铜箔焊接的微观结构及力学性能的影响。将20层(厚度为20μm)镀镍铜箔焊接到0.5 mm镀镍铜片上,研究焊接速度对焊缝形貌以及抗拉强度的影响。对焊缝失效模式的宏观形貌以及断口微观形貌进行分析,并对焊缝的电导率进行测试。结果表明,在激光焊接过程中,熔深易于控制。随着焊接速度提高,焊缝熔深逐渐降低,焊缝抗拉强度先提高后降低,当焊接速度为30 mm/s时,焊缝抗拉强度达到最高,为75 MPa。激光可应用于多层镀镍铜箔的焊接,激光焊接后具有良好的力学性能。The micro-structure and mechanical characteristics of the multi-layer nickel-plated copper foil welding by blue light laser with 450 nm were investigated. Nickel-plated copper foil with 20 layers were welded onto nickel-plated copper sheet with 0.5 mm, and the effects of different welding speeds on the weld morphology and tensile strength were investigated. The morphology on the weld failure mode and the micro morphology of the fracture were analyzed, and the electrical conductivity of the weld were tested. The results indicate that during the blue laser welding process, the depth of penetration is easily controlled.With the increase of welding speed, the weld penetration depth is gradually decreased, and the tensile strength of the weld is increased at first and then decreased.When the welding speed is 30 mm/s, the tensile strength of the weld reaches the maximum of 75 MPa. Blue laser can be successfully applied to the welding of multi-layer nickel-plated copper foil and laser welding leads to good mechanical properties.

关 键 词：蓝光激光器 镀镍铜箔 激光焊接 抗拉强度 

分 类 号：TG456.7[金属学及工艺—焊接] TG146.11[一般工业技术—材料科学与工程]