Ryuji Ohshita

Title: Ryuji Ohshita: Innovating Battery Technology for Safer and More Efficient Energy Storage

Introduction:

Ryuji Ohshita, an esteemed inventor and engineer hailing from Tokushima, Japan, has made remarkable contributions to the world of battery technology. With an impressive portfolio of 40 patents, Ohshita has focused his efforts on developing innovative solutions for nonaqueous electrolyte secondary batteries. His latest patents showcase his expertise in creating batteries that minimize magnetic fields, reduce risks of internal shorts, and improve overall energy storage efficiency.

Latest Patents:

One of Ohshita's recent inventions is the "Nonaqueous Electrolyte Secondary Battery." This rectangular battery addresses the problem of magnetic field generation during use, as well as the risk of internal shorts between the positive and negative electrode tabs. Ohshita's solution involves positioning both tabs at the beginning side of a winding for wound electrodes. By welding the outer housing and sealing plate with the positive electrode tab sandwiched at the mating part, the negative electrode tab can be electrically connected to a terminal on the sealing plate. The innovation of dividing the electrode tabs with a specific spacing of 2-12 mm in the direction of battery width further enhances safety and efficiency.

Another notable patent from Ohshita is the "Spiral Electrode Rectangular Battery." This design improves the performance and durability of batteries by using a spiral winding technique. The battery's electrode unit, composed of a positive and negative electrode plate separated by a separator, is rolled and housed in an exterior casing. Ohshita's design incorporates rounded edge regions with curved surfaces to prevent stress concentration and maximize overall stability. Corner cuts are also included to improve winding accuracy and integrity, ensuring optimal utilization of the electrode plates.

Career Highlights:

Ryuji Ohshita has dedicated his career to battery research and development at Sanyo Electric Co., a renowned company in the field. Through his expertise and commitment, he has contributed significantly to the advancements in battery technology, particularly in the area of nonaqueous electrolyte secondary batteries. Ohshita's 40 patents exemplify his innovative thinking and attention to detail, making him a respected figure in the industry.

Collaborations:

Throughout his career, Ohshita has had the privilege of collaborating with exceptional colleagues. Shin Fujitani and Maruo Kamino, two notable names in the field, have worked alongside Ohshita to further enhance battery technology and address critical challenges. Their combined expertise and shared passion for innovation have undoubtedly contributed to their success, resulting in a prolific and impactful collaboration.

Conclusion:

Ryuji Ohshita's outstanding contributions to battery technology have significantly influenced the way we store and utilize energy. Through his numerous patents, including the groundbreaking designs for nonaqueous electrolyte secondary batteries and spiral electrode rectangular batteries, Ohshita exemplifies the transformative power of innovation in the pursuit of safer, more efficient, and environmentally friendly energy solutions. With a remarkable career at Sanyo Electric Co. and fruitful collaborations with esteemed colleagues, Ohshita continues to shape the future of battery technology, leaving a lasting impact on the industry and society as a whole.