Inventor · disambiguated record
Keiichiro Ohkawa
Also filed as: OHKAWA KEIICHIRO
40 granted patents·4 pending applications·210 citations·filing 1999–2020
97Inventor score
Files withHITACHI AUTOMOTIVE SYSTEMS LTD14VEHICLE ENERGY JAPAN INC14OHKAWA KEIICHIRO6HITACHI VEHICLE ENERGY LTD3AOSHIMA YOSHINORI2
Top patents by PatentIndex Score
44 records- 0197US11226376B2Storage battery control deviceHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2016·Granted Jan 18, 2022·68 cites·6 claims
- 0294US10955479B2Battery control deviceVEHICLE ENERGY JAPAN INC·Filed 2017·Granted Mar 23, 2021·6 cites·10 claims
- 0394US10147983B2Secondary battery systemHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2015·Granted Dec 4, 2018·15 cites·8 claims
- 0490US10840722B2Battery control deviceHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2016·Granted Nov 17, 2020·3 cites·7 claims
- 0590US9203248B2Battery management system using non-volatile memoryOHKAWA KEIICHIRO·Filed 2010·Granted Dec 1, 2015·22 cites·13 claims
- 0689US9685807B2Battery control deviceHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2014·Granted Jun 20, 2017·17 cites·6 claims
- 0788US10725111B2Battery state detection device, secondary battery system, program product, and battery state detection methodVEHICLE ENERGY JAPAN INC·Filed 2015·Granted Jul 28, 2020·3 cites·7 claims
- 0888US10591550B2Secondary-battery monitoring device and prediction method of battery capacity of secondary batteryHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2015·Granted Mar 17, 2020·3 cites·5 claims
- 0985US10807494B2Battery management system, battery system and hybrid vehicle control systemVEHICLE ENERGY JAPAN INC·Filed 2017·Granted Oct 20, 2020·2 cites·7 claims
- 1085US10266063B2Battery controller and vehicle systemHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2016·Granted Apr 23, 2019·3 cites·16 claims
- 1184US11124072B2Battery control device and electric motor vehicle systemVEHICLE ENERGY JAPAN INC·Filed 2016·Granted Sep 21, 2021·2 cites·7 claims
- 1284US9423464B2Battery control deviceAOSHIMA YOSHINORI·Filed 2011·Granted Aug 23, 2016·4 cites·5 claims
- 1381US12117499B2Battery management apparatus, battery management method, and battery energy storage systemVEHICLE ENERGY JAPAN INC·Filed 2020·Granted Oct 15, 2024·2 cites·8 claims
- 1480US10818983B2Battery management device and system, and hybrid vehicle control system for utilizing battery performance while maintaining battery lifeHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2016·Granted Oct 27, 2020·4 cites·11 claims
- 1579US10879570B2Storage battery control deviceVEHICLE ENERGY JAPAN INC·Filed 2016·Granted Dec 29, 2020·1 cites·2 claims
- 1678US12424673B2Battery control apparatus and battery systemVEHICLE ENERGY JAPAN INC·Filed 2020·Granted Sep 23, 2025·1 cites·12 claims
- 1778US10209317B2Battery control device for calculating battery deterioration based on internal resistance increase rateHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2013·Granted Feb 19, 2019·4 cites·12 claims
- 1875US10589732B2Battery control device and vehicle systemHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2016·Granted Mar 17, 2020·3 cites·16 claims
- 1973US10680453B2Battery control deviceHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2016·Granted Jun 9, 2020·2 cites·7 claims
- 2073US9537325B2Battery state estimation system, battery control system, battery system, and battery state estimation methodHITACHI VEHICLE ENERGY LTD·Filed 2013·Granted Jan 3, 2017·5 cites·9 claims
- 2172US10686229B2Battery state detection device, secondary battery system, program product, and battery state detection methodVEHICLE ENERGY JAPAN INC·Filed 2015·Granted Jun 16, 2020·1 cites·11 claims
- 2271US9252602B2Electric storage cell control circuitOHKAWA KEIICHIRO·Filed 2011·Granted Feb 2, 2016·4 cites·11 claims
- 2370US12149114B2Battery control apparatusVEHICLE ENERGY JAPAN INC·Filed 2019·Granted Nov 19, 2024·1 cites·11 claims
- 2470US11532841B2Storage battery control deviceVEHICLE ENERGY JAPAN INC·Filed 2020·Granted Dec 20, 2022·0 cites·4 claims
- 2570US9641011B2Battery control device adapting the battery current limit by decreasing the stored current limit by comparing it with the measured battery currentOHKAWA KEIICHIRO·Filed 2011·Granted May 2, 2017·4 cites·8 claims
- 2669US8417990B2Multi-core processing system for vehicle control or an internal combustion engine controllerOHKAWA KEIICHIRO·Filed 2009·Granted Apr 9, 2013·4 cites·19 claims
- 2767US11374425B2Battery energy storage system, battery management system, and control method for controlling battery temperatureHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2018·Granted Jun 28, 2022·1 cites·1 claims
- 2863US11247581B2Battery control deviceVEHICLE ENERGY JAPAN INC·Filed 2020·Granted Feb 15, 2022·0 cites·8 claims
- 2957US9590431B2Battery controller, battery systemOHKAWA KEIICHIRO·Filed 2011·Granted Mar 7, 2017·1 cites·16 claims
- 3053US6851106B1Object oriented optimizing code generator with user selection of use or do not use for dynamic generation of functionsHITACHI LTD·Filed 1999·Granted Feb 1, 2005·24 cites·9 claims
- 3151US9689926B2Battery controlling using charge state calculator and charge state verifierHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2013·Granted Jun 27, 2017·0 cites·10 claims
- 3250US11084385B2Battery control device, battery system, and vehicleVEHICLE ENERGY JAPAN INC·Filed 2017·Granted Aug 10, 2021·0 cites·12 claims
- 3350US9557388B2Battery control deviceAOSHIMA YOSHINORI·Filed 2012·Granted Jan 31, 2017·0 cites·8 claims
- 3449US12117497B2Battery status estimation apparatus and battery control apparatusVEHICLE ENERGY JAPAN INC·Filed 2019·Granted Oct 15, 2024·0 cites·10 claims
- 3548US11515579B2Cell control device, power systemHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2016·Granted Nov 29, 2022·0 cites·16 claims
- 3648US10845417B2Battery state estimation device, battery control device, battery system, battery state estimation methodHITACHI AUTOMOTIVE SYSTEMS LTD·Filed 2017·Granted Nov 24, 2020·0 cites·7 claims
- 3748US8484266B2Embedded control system with floating-point conversionFUJIMOTO SHINYA·Filed 2009·Granted Jul 9, 2013·0 cites·11 claims
- 3848US2005160410A1Object-oriented optimization code generator and a method thereforHITACHI LTD·Filed 2004·Application pending·0 cites
- 3945US2014184236A1Battery control apparatus and battery systemHITACHI VEHICLE ENERGY LTD·Filed 2011·Application pending·0 cites
- 4043US2015346285A1Device for Assessing Extent of Degradation of Secondary BatteryHITACHI VEHICLE ENERGY LTD·Filed 2013·Application pending·0 cites
- 4142US9252624B2Battery control device and battery systemOHKAWA KEIICHIRO·Filed 2011·Granted Feb 2, 2016·0 cites·9 claims
- 4241US2014239914A1Battery controllerIGARASHI NAOYUKI·Filed 2011·Application pending·0 cites
- 4337US9680320B2Battery control apparatusTSURU KENICHIRO·Filed 2011·Granted Jun 13, 2017·0 cites·12 claims
- 4436US12038483B2Battery control deviceVEHICLE ENERGY JAPAN INC·Filed 2019·Granted Jul 16, 2024·0 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →