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The global technical trend of the automobile industry has been moving to environmental friendly. Typical gasoline cars will be replaced by green cars such as hydrogen, electric and hybrid cars. Therefore, the demand for battery cells is expected to increase remarkably. Welding and joining technologies are key technology for assembling tab to tab or tab to bus bar, and it is important to secure stable and robust joints. This paper provides a comprehensive review of joining technologies for the ultrasonic and laser welding, respectively. It discusses the advantages and disadvantages of the joining technologies for the Al and Cu dissimilar joints as related to battery manufacturing, and discusses corresponding issues.

Ultrasonic and Laser Welding Technologies on Al/Cu Dissimilar Materials for the Lithium-Ion Battery Cell or Module Manufacturing