Koichi Yokoyama

Title: Koichi Yokoyama: Innovator in Secondary Battery Technology

Introduction

Koichi Yokoyama is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of secondary battery technology, holding a total of 7 patents. His work focuses on accurately detecting the states of various types of secondary batteries, which is crucial for enhancing battery performance and longevity.

Latest Patents

Yokoyama's latest patents include a secondary battery state detecting device and a secondary battery state detecting method. The objective of these inventions is to detect the states of multiple secondary batteries of different kinds with high accuracy. The device comprises a measurement unit that includes voltage and current sensors to measure the current flowing through the battery and the voltage generated. An optimization unit optimizes the element constants of an equivalent circuit model based on the measured values. Additionally, an identification unit identifies the type of secondary battery using the optimized constants, while a storage unit holds detection formulas for each battery type. The detection unit then applies these constants to the relevant formula to determine the battery's state.

Another patent focuses on accurately detecting the states of various types of secondary batteries, even in low-current ranges. This device includes a current detecting unit, a calculating unit for equivalent circuit components, and an estimating unit that calculates voltage drop values caused by dark currents. The state detecting unit then uses this information to assess the battery's condition.

Career Highlights

Throughout his career, Koichi Yokoyama has worked with notable companies such as Furukawa Electric Co., Ltd. and Furukawa Automotive Systems Inc. His experience in these organizations has allowed him to develop innovative solutions in battery technology.

Collaborations

Yokoyama has collaborated with talented individuals in his field, including Naoya Takashima and Noriyasu Iwane. These partnerships have contributed to the advancement of his research and inventions.

Conclusion

Koichi Yokoyama is a distinguished inventor whose work in secondary battery technology has led to significant advancements in the field. His innovative patents and collaborations highlight his commitment to improving battery performance and reliability.