公开(公告)号：US20210096190A1

公开(公告)日：2021-04-01

申请号：US16756910

申请日：2018-07-04

申请人： GS Yuasa International Ltd.

发明人： Toshihiro YOSHIDA ,  Yuki NAKANISHI ,  Kazuhiro SUGIE

IPC分类号： G01R31/3842 ,  H02J7/00 ,  G01R31/389 ,  G01R31/392 ,  G01K3/00 ,  H01M10/48

摘要： An energy storage system includes a lead-acid battery, a battery management unit. The battery management unit defines, based on an open voltage of the lead-acid battery, a first amount of change in a capacity of the lead-acid battery from a reference state, correlating with the open voltage of the lead-acid battery and caused by a first deterioration factor and defines, based on the first amount of change in the capacity and an amount of change in overall internal resistance of the lead-acid battery from the reference state, a second amount of change in a capacity of the lead-acid battery, not correlating with the open voltage and caused by a second deterioration factor. The battery management unit defines, based on the first and second amounts of change in the capacity, at least one of a battery capacity of the lead-acid battery or an amount of change in the battery capacity from the reference state.