KO

Keiichiro Ohkawa

VJ Vehicle Energy Japan: 22 patents #1 of 73Top 2%
HS Hitachi Automotive Systems: 15 patents #71 of 1,636Top 5%
HI Hitachi: 3 patents #10,712 of 28,497Top 40%
📍 Hitachinaka, JP: #95 of 2,447 inventorsTop 4%
Overall (All Time): #78,479 of 4,157,543Top 2%
40
Patents All Time

Issued Patents All Time

Showing 1–25 of 40 patents

Patent #TitleCo-InventorsDate
12424673 Battery control apparatus and battery system Ryohhei Nakao 2025-09-23
12149114 Battery control apparatus Ryohhei Nakao, Yasuo Arishima, Hironori Sasaki 2024-11-19
12117499 Battery management apparatus, battery management method, and battery energy storage system Fanny MATTHEY, Ryohhei Nakao, Yosuke Wada 2024-10-15
12117497 Battery status estimation apparatus and battery control apparatus Yosuke Wada 2024-10-15
12038483 Battery control device Miyuki AKATSU 2024-07-16
11532841 Storage battery control device Shin Yamauchi, Kei Sakabe, Masahiro Yonemoto, Takanori Yamazoe, Ryohhei Nakao 2022-12-20
11515579 Cell control device, power system Kei Sakabe, Ryohhei Nakao, Masahiro Yonemoto 2022-11-29
11374425 Battery energy storage system, battery management system, and control method for controlling battery temperature Fanny MATTHEY, Shin Yamauchi, Kei Sakabe, Ryohhei Nakao, Daiki Komatsu 2022-06-28
11247581 Battery control device Kei Sakabe, Takanori Yamazoe, Ryohhei Nakao, Masahiro Yonemoto 2022-02-15
11226376 Storage battery control device Shin Yamauchi, Kei Sakabe, Masahiro Yonemoto, Takanori Yamazoe, Ryohhei Nakao 2022-01-18
11124072 Battery control device and electric motor vehicle system Ryohhei Nakao 2021-09-21
11084385 Battery control device, battery system, and vehicle Daiki Komatsu, Kei Sakabe, Masahiro Yonemoto, Shin Yamauchi, Ryohhei Nakao 2021-08-10
10955479 Battery control device Ryohhei Nakao 2021-03-23
10879570 Storage battery control device Shin Yamauchi, Kei Sakabe, Masahiro Yonemoto, Takanori Yamazoe, Ryohhei Nakao 2020-12-29
10845417 Battery state estimation device, battery control device, battery system, battery state estimation method Yohei Nakamura 2020-11-24
10840722 Battery control device Yoshinori Aoshima 2020-11-17
10818983 Battery management device and system, and hybrid vehicle control system for utilizing battery performance while maintaining battery life Masahiro Yonemoto, Kei Sakabe, Takanori Yamazoe, Shin Yamauchi, Ryohhei Nakao 2020-10-27
10807494 Battery management system, battery system and hybrid vehicle control system Masahiro Yonemoto, Kei Sakabe, Ryohhei Nakao, Daiki Komatsu 2020-10-20
10725111 Battery state detection device, secondary battery system, program product, and battery state detection method Youhei Kawahara, Masahiro Yonemoto 2020-07-28
10686229 Battery state detection device, secondary battery system, program product, and battery state detection method Youhei Kawahara, Masahiro Yonemoto 2020-06-16
10680453 Battery control device Kei Sakabe, Takanori Yamazoe, Ryohhei Nakao, Masahiro Yonemoto 2020-06-09
10589732 Battery control device and vehicle system Ryohhei Nakao 2020-03-17
10591550 Secondary-battery monitoring device and prediction method of battery capacity of secondary battery Masahiro Yonemoto, Youhei Kawahara, Takeshi Inoue 2020-03-17
10266063 Battery controller and vehicle system Ryohhei Nakao 2019-04-23
10209317 Battery control device for calculating battery deterioration based on internal resistance increase rate Naoyuki Igarashi 2019-02-19