Yusai Murakami

Title: Yusai Murakami: Innovator in Battery Technology

Introduction

Yusai Murakami is a prominent inventor based in Hamamatsu, Japan. He has made significant contributions to the field of battery technology, holding a total of 16 patents. His work focuses on improving the efficiency and reliability of secondary batteries.

Latest Patents

One of his latest patents is a method and apparatus for estimating the charge/discharge electricity amount of secondary batteries. This innovative apparatus estimates the charge/discharge electricity amount without being affected by current measurement error. Under specific selection conditions, a no-load voltage calculation part uses pairs of data consisting of current data I(n) and voltage data V(n) to calculate a no-load voltage as the voltage intercept at a current of zero. This is achieved through statistical processing such as regression analysis using a least squares method. Additionally, if specific current conditions exist for a certain amount of time, an open circuit voltage calculation part calculates the terminal voltage of the secondary battery as the open circuit voltage V. Furthermore, an estimated charge/discharge electricity amount calculation part utilizes a preset change-in-voltage adjustment constant, change-in-electromotive-force constant, and polarization voltage generation constant to calculate the estimated charge/discharge electricity amount as a function of the change in the no-load or open circuit voltage over a predetermined period of time. Another notable patent is a temperature management apparatus for managing the temperature of cells. This apparatus includes an air intake duct, a fan unit, and multiple temperature detectors to ensure optimal operating conditions for the battery cells.

Career Highlights

Yusai Murakami has worked with notable companies, including Panasonic EV Energy Co., Ltd. His experience in these organizations has allowed him to develop and refine his innovative ideas in battery technology.

Collaborations

Throughout his career, Yusai has collaborated with talented individuals such as Tadao Kimura and Norito Yamabe. These collaborations have contributed to the advancement of his projects and patents.

Conclusion

Yusai Murakami is a distinguished inventor whose work in battery technology has led to numerous patents and innovations. His contributions continue to impact the field significantly.