Chih-chang Chen

Title: Innovations by Chih-chang Chen in Welding Technologies

Introduction

Chih-chang Chen is a prominent inventor based in Rochester Hills, MI (US). He has made significant contributions to the field of welding technologies, holding a total of 11 patents. His work focuses on advanced methods and systems for joining metallic workpieces, particularly in the context of battery cell manufacturing.

Latest Patents

Chen's latest patents include innovative welding systems and methods that utilize knurled weld interfaces for metallic workpieces. One notable patent presents metalworking systems designed for joining metallic workpieces, along with methods for forming and welding these components. This includes lithium-ion battery pouch cells that feature anodized aluminum tabs joined through knurling and laser welding. The method involves a workpiece support frame that receives metallic workpieces, each treated with a layer that releases gas during welding. A metalworking device creates a knurl pattern on the workpiece surface, which includes a network of channels to exhaust gas released during the welding process. Subsequently, a laser welding device welds the joint region of the metallic workpieces with the knurl pattern.

Another significant patent describes a method and apparatus for welding foils. This invention details a process for joining a battery cell tab to multiple foils associated with the electrodes of a battery cell. The method involves stacking the foils and using a first joining device to define a joining region. The battery cell tab is then arranged on the foils and joined using a second joining device, which generates a weld joint within the defined region. This approach enhances weld quality and strength by minimizing porosities and cracks in the foil/tab weld joints.

Career Highlights

Chih-chang Chen is currently employed at GM Global Technology Operations LLC, where he continues to innovate in the field of welding technologies. His expertise and contributions have positioned him as a key figure in advancing metalworking systems.

Collaborations

Chen has collaborated with notable colleagues, including Daniel C Hutchinson and Michael J Bland, who share his commitment to innovation in welding technologies.

Conclusion

Chih-chang Chen's work exemplifies the intersection of innovation and practical application in welding technologies. His patents reflect a deep understanding of the challenges in metalworking and a dedication to improving manufacturing processes.