公开(公告)号：US12038483B2

公开(公告)日：2024-07-16

申请号：US17284618

申请日：2019-09-25

申请人： Vehicle Energy Japan Inc.

发明人： Miyuki Akatsu ,  Keiichiro Ohkawa

IPC分类号： G01R31/3842 ,  G01R31/36 ,  G01R31/3828 ,  G01R31/388 ,  H01M10/48 ,  H02J7/00

CPC分类号： G01R31/3842 ,  G01R31/3648 ,  G01R31/388 ,  H01M10/48 ,  H01M10/482 ,  H02J7/0013 ,  G01R31/3828

摘要： A battery control unit has an SOCv operation unit which calculates a state of charge SOCv based on voltage of a battery, a ΔSOCi operation unit which calculates an amount of change ΔSOCi of the state of charge based on current value of the battery, a weight operation unit which calculates a weight W, and an SOCc operation unit which calculates a final SOC (SOCc) based on the SOCv, the ΔSOCi and the weight W. Terms forming an operational expression of the SOCc are retained, by using a determination threshold, as a sum SOCc_Big of terms of a large value group and a sum SOCc_Small of terms of a small value group, and used in calculating the SOCc of a subsequent operation period. By using the SOCc_Big and the SOCc_Small, it is possible to prevent the accumulation of errors caused by information loss that occurred when repeatedly operating the SOCc.