Jei Wei Chang

Title: Innovations of Jei Wei Chang

Introduction

Jei Wei Chang is a notable inventor based in Cupertino, CA. He has made significant contributions to the field of energy storage and magnetic materials, holding a total of 4 patents. His work reflects a deep understanding of both electrical engineering and materials science.

Latest Patents

One of his latest patents is a series/parallel connection scheme for energy storage devices. This innovation involves a battery pack with series-parallel connected battery cells. It features an inrush current limiting circuit that includes current limiting devices and a current limiting tracking means to manage inrush current from shorted battery cells. The design ensures that when one battery cell shorts, the current limiting devices, which are variable buffer resistors with a positive temperature coefficient, effectively limit the inrush current from neighboring cells. Additionally, the current limiting tracking means are heat sinks that thermally couple the buffer resistors, allowing them to increase resistance with temperature changes caused by current flow.

Another significant patent is for an ultra high saturation moment soft magnetic thin film. This plated magnetic thin film has high saturation magnetization and low coercivity, suitable for use in magnetic recording heads that operate on narrow trackwidth, high coercivity media. The innovative plating method involves four current application processes: direct current, pulsed current, pulse reversed current, and conditioned pulse reversed current.

Career Highlights

Jei Wei Chang has worked with several prominent companies, including Headway Technologies and Amperex Technology Limited. His experience in these organizations has allowed him to refine his skills and contribute to cutting-edge technologies in energy storage and magnetic materials.

Collaborations

Throughout his career, Chang has collaborated with talented individuals such as Chaopeng Chen and Kevin K Lin. These partnerships have fostered innovation and have been instrumental in the development of his patented technologies.

Conclusion

Jei Wei Chang's contributions to the fields of energy storage and magnetic materials are noteworthy. His innovative patents and collaborations highlight his expertise and commitment to advancing technology. His work continues to influence the industry and pave the way for future innovations.