公开(公告)号：US20230133960A1

公开(公告)日：2023-05-04

申请号：US17938664

申请日：2022-10-06

申请人： FDK CORPORATION

发明人： Shun Mochizuki

IPC分类号： H02J7/00 ,  G01R31/396

摘要： A charging method for supplementarily charging a plurality of secondary batteries accommodated in a casing on a regular basis includes the steps of: charging the plurality of secondary batteries at the same time at the time of initial supplementary charging; acquiring each of peak temperatures during charging of the plurality of secondary batteries; listing combination patterns when the plurality of secondary batteries are split into a plurality of charging groups; predicting, for each of the combination patterns, each of the peak temperatures in a case in which charging is performed for each of the charging groups, on the basis of the peak temperatures at the time of the initial supplementary charging; and split-charging the plurality of secondary batteries in the combination pattern that minimizes a variation in the predicted peak temperatures.

公开(公告)号：US20210344204A1

公开(公告)日：2021-11-04

申请号：US17268912

申请日：2019-06-14

申请人： FDK CORPORATION

发明人： Shun Mochizuki

IPC分类号： H02J7/00

摘要： A power storage device 1 includes first power storage unit BBU1 to seventh power storage unit BBU7 connected in series and a control unit 10 for monitoring each unit voltage and controlling each of the power storage units, each power storage unit BBU 1-7 includes a power storage portion BAT and a charge switch SWC connected in series between charge/discharge terminals T and a bypass switch SWB providing a bypass between the charge/discharge terminals T, and for the respective power storage units connected in series, the control unit 10 equalizes the unit voltages by individually setting a charging mode in which the bypass switch SWB is controlled to be set to OFF while the charge switch SWC is controlled to be set to ON to charge the power storage portion BAT with a constant current, and a bypass mode in which the bypass switch SWB is controlled to be set to ON while the charge switch SWC is controlled to be set to OFF to stop charging of the power storage portion BAT.