Company Filing History:
9 out of 2,028 
4 out of 13,411 
2 out of 73 Years Active: 2017-2025
Title: Hiroshi Morikawa: Innovator in Battery Technology
Introduction
Hiroshi Morikawa, an esteemed inventor located in Hitachinaka, Japan, boasts a remarkable portfolio with a total of 10 patents to his name. His innovative contributions mainly revolve around the development of advanced battery control devices, showcasing his expertise in electrical engineering and energy storage technologies.
Latest Patents
Morikawa's latest inventions include a pioneering battery control device designed to set appropriate upper limit current values. This innovation considers steep changes in battery voltage experienced in high-current regions, driven by the ion concentration gradient in a diffusion layer around the interface between an electrode and an electrolyte. The device features a concentration gradient estimator that estimates the lithium-ion concentration gradient based on the current flowing through the battery and the temperature. Additionally, an upper limit current determiner establishes the upper limit current value, ensuring that any overvoltage remains within a predetermined range.
Another of Morikawa’s significant innovations, the battery controlling device, incorporates a voltage detecting unit that measures the closed-circuit voltage of a secondary battery. It also includes an open-circuit-voltage computing unit that computes the open-circuit voltage. This device plays a crucial role in monitoring the battery's performance by discriminating whether the computed value, based on the voltage difference over a continuous predetermined period, exceeds a permissible value predetermined in advance. If so, it outputs a signal to restrict charge and discharge activities of the secondary battery.
Career Highlights
Hiroshi Morikawa has had a distinguished career, contributing to major companies like Hitachi Automotive Systems and Nissan Motor Company Limited. His work at these notable organizations has propelled advancements in automotive technologies and battery systems, reinforcing the significance of his patents in the modern energy landscape.
Collaborations
Throughout his career, Morikawa has collaborated with talented individuals in his field, including peers such as Yoshinori Aoshima and Masayuki Takada. These collaborations have often fostered innovative solutions and advancements in battery technology that drive the industry forward.
Conclusion
Hiroshi Morikawa stands as a prominent figure in the realm of battery innovation. His extensive patent portfolio and contributions to leading automotive companies underline his impact in advancing energy storage technologies. As the demand for efficient battery systems continues to grow, Morikawa’s innovations are poised to play a pivotal role in shaping the future of energy solutions.