Inventor
OHKAWA KEIICHIRO
JP40 patents
⚠️ This page may combine multiple inventors who share the name “OHKAWA KEIICHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI AUTOMOTIVE SYSTEMS LTD
14 patentsUS11226376B2Jan 18, 2022
Storage battery control device
HITACHI AUTOMOTIVE SYSTEMS LTD68 citations97
US10147983B2Dec 4, 2018
Secondary battery system
HITACHI AUTOMOTIVE SYSTEMS LTD15 citations84
US9685807B2Jun 20, 2017
Battery control device
HITACHI AUTOMOTIVE SYSTEMS LTD17 citations82
US10840722B2Nov 17, 2020
Battery control device
HITACHI AUTOMOTIVE SYSTEMS LTD3 citations73
US10591550B2Mar 17, 2020
Secondary-battery monitoring device and prediction method of battery capacity of secondary battery
HITACHI AUTOMOTIVE SYSTEMS LTD3 citations73
US10818983B2Oct 27, 2020
Battery management device and system, and hybrid vehicle control system for utilizing battery performance while maintaining battery life
HITACHI AUTOMOTIVE SYSTEMS LTD4 citations72
US10680453B2Jun 9, 2020
Battery control device
HITACHI AUTOMOTIVE SYSTEMS LTD2 citations72
US10589732B2Mar 17, 2020
Battery control device and vehicle system
HITACHI AUTOMOTIVE SYSTEMS LTD3 citations72
US10266063B2Apr 23, 2019
Battery controller and vehicle system
HITACHI AUTOMOTIVE SYSTEMS LTD3 citations72
US10209317B2Feb 19, 2019
Battery control device for calculating battery deterioration based on internal resistance increase rate
HITACHI AUTOMOTIVE SYSTEMS LTD4 citations71
US11515579B2Nov 29, 2022
Cell control device, power system
HITACHI AUTOMOTIVE SYSTEMS LTD0 citations62
US11374425B2Jun 28, 2022
Battery energy storage system, battery management system, and control method for controlling battery temperature
HITACHI AUTOMOTIVE SYSTEMS LTD1 citations61
US9689926B2Jun 27, 2017
Battery controlling using charge state calculator and charge state verifier
HITACHI AUTOMOTIVE SYSTEMS LTD0 citations48
US10845417B2Nov 24, 2020
Battery state estimation device, battery control device, battery system, battery state estimation method
HITACHI AUTOMOTIVE SYSTEMS LTD0 citations42
VEHICLE ENERGY JAPAN INC
14 patentsUS11124072B2Sep 21, 2021
Battery control device and electric motor vehicle system
VEHICLE ENERGY JAPAN INC2 citations72
US10955479B2Mar 23, 2021
Battery control device
VEHICLE ENERGY JAPAN INC6 citations72
US10807494B2Oct 20, 2020
Battery management system, battery system and hybrid vehicle control system
VEHICLE ENERGY JAPAN INC2 citations72
US10725111B2Jul 28, 2020
Battery state detection device, secondary battery system, program product, and battery state detection method
VEHICLE ENERGY JAPAN INC3 citations72
US12117499B2Oct 15, 2024
Battery management apparatus, battery management method, and battery energy storage system
VEHICLE ENERGY JAPAN INC2 citations71
US12424673B2Sep 23, 2025
Battery control apparatus and battery system
VEHICLE ENERGY JAPAN INC1 citations63
US11532841B2Dec 20, 2022
Storage battery control device
VEHICLE ENERGY JAPAN INC0 citations62
US11247581B2Feb 15, 2022
Battery control device
VEHICLE ENERGY JAPAN INC0 citations62
US11084385B2Aug 10, 2021
Battery control device, battery system, and vehicle
VEHICLE ENERGY JAPAN INC0 citations62
US10879570B2Dec 29, 2020
Storage battery control device
VEHICLE ENERGY JAPAN INC1 citations62
US10686229B2Jun 16, 2020
Battery state detection device, secondary battery system, program product, and battery state detection method
VEHICLE ENERGY JAPAN INC1 citations62
US12149114B2Nov 19, 2024
Battery control apparatus
VEHICLE ENERGY JAPAN INC1 citations61
US12117497B2Oct 15, 2024
Battery status estimation apparatus and battery control apparatus
VEHICLE ENERGY JAPAN INC0 citations51
US12038483B2Jul 16, 2024
Battery control device
VEHICLE ENERGY JAPAN INC0 citations41
OHKAWA KEIICHIRO
6 patentsUS9203248B2Dec 1, 2015
Battery management system using non-volatile memory
OHKAWA KEIICHIRO22 citations92
US9641011B2May 2, 2017
Battery control device adapting the battery current limit by decreasing the stored current limit by comparing it with the measured battery current
OHKAWA KEIICHIRO4 citations71
US9252602B2Feb 2, 2016
Electric storage cell control circuit
OHKAWA KEIICHIRO4 citations71
US8417990B2Apr 9, 2013
Multi-core processing system for vehicle control or an internal combustion engine controller
OHKAWA KEIICHIRO4 citations62
US9590431B2Mar 7, 2017
Battery controller, battery system
OHKAWA KEIICHIRO1 citations51
US9252624B2Feb 2, 2016
Battery control device and battery system
OHKAWA KEIICHIRO0 citations40