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公开(公告)号：US20230065968A1
公开(公告)日：2023-03-02
申请号：US17759913
申请日：2020-12-28
Inventor： SHINYA NISHIKAWA , TOMOKAZU SADA , TAKASHI IIDA , MASAAKI TAKEGATA
IPC: G01R31/396 , G01R31/374 , G01R31/3828 , G01R31/387 , G01R31/392
Abstract: In a calculation system, a data acquisition unit is configured to acquire operation data of a battery, the operation data including at least voltages and currents measured by a management device at a plurality of time points, and states of charge (SOCs) estimated based on at least one of the voltages and the currents, the management device being configured to manage the battery. An extraction unit is configured to, extract, as sample data, a set of an SOC and a voltage from sets of the SOCs and the voltages the plurality of time points included in the operation data in a period in which the battery is regarded as resting, the period being specified based on the currents. An estimation unit is configured to estimate an SOC-open circuit voltage (OCV) characteristic of the battery based on the extracted sample data.
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公开(公告)号：US20210339650A1
公开(公告)日：2021-11-04
申请号：US17266787
申请日：2019-02-13
Inventor： MAKOTO HASHIMOTO , YOHEI ISHII , TOHRU WATANABE , TADAO KIMURA , MASAAKI TAKEGATA
IPC: B60L58/16 , B60L50/60 , B60L15/20 , B60L58/12 , H02J7/00 , G06Q10/06 , G06Q50/30 , G06Q10/08 , G06Q30/02 , G05B19/042 , H01M10/48
Abstract: In a vehicle power supply system mounted on an electric vehicle, a vehicle controller switches a discharge power limit to a motor during travel of the electric vehicle according to degradation information of a battery module to which a plurality of cells are connected, the degradation information being calculated in advance before the travel of the electric vehicle. For example, the vehicle controller switches a limit of a maximum acceleration and/or maximum speed of the electric vehicle as the switching of the discharge power limit.
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