Masafumi Shiwa

Title: **Innovator Spotlight: Masafumi Shiwa**

Introduction

Masafumi Shiwa, an accomplished inventor located in Hitachinaka, Japan, has made significant contributions to the field of battery technology. With a total of two patents to his name, his innovations aim to enhance the efficiency and reliability of battery systems, particularly in high-performance applications.

Latest Patents

Shiwa's latest patents showcase his expertise in battery control systems and design. One notable patent is for a **Battery Control Device**, which introduces an upper limit current value that takes into account the steep changes in battery voltage caused by the ion concentration gradient in a diffusion layer at the interface of the electrode and electrolyte. This technology includes a concentration gradient estimator that predicts lithium ion concentration in the diffusion layer, adjusting the upper limit current value to prevent overvoltage, ensuring optimal battery performance.

Additionally, he has developed a **Square Secondary Battery** designed to minimize the risk of welding failures. This innovation features a sealing cover that is temporarily secured, allowing for leakage detection even in the event of welding issues. The design incorporates a pressure-sensitive adhesive between the sealing cover and the battery case, facilitating effective communication of gas passages for ventilation, enhancing overall safety and functionality.

Career Highlights

Shiwa's professional journey includes work with reputable companies in the automotive industry, such as Hitachi Automotive Systems and Vehicle Energy Japan Inc. His involvement with these organizations has allowed him to apply his inventive spirit to real-world applications, contributing to advancements in battery technology.

Collaborations

Throughout his career, Masafumi Shiwa has collaborated with notable colleagues, including Kazuaki Urano and Yoshikazu Noiri. Their combined efforts have further propelled innovation in the battery sector, making strides toward safer and more efficient energy solutions.

Conclusion

Masafumi Shiwa's work embodies the spirit of innovation, with his patents functioning as a testament to his dedication to improving battery technology. As the demand for reliable energy sources continues to grow, inventors like Shiwa play a crucial role in shaping the future of energy solutions.