US 12,034,323 B2
Battery control unit and battery system
Chihiro Ono, Susono (JP); and Takahiro Syouda, Susono (JP)
Assigned to YAZAKI CORPORATION, Tokyo (JP)
Filed by Yazaki Corporation, Tokyo (JP)
Filed on Jun. 9, 2021, as Appl. No. 17/343,188.
Claims priority of application No. 2020-106010 (JP), filed on Jun. 19, 2020.
Prior Publication US 2021/0399558 A1, Dec. 23, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H02J 7/00 (2006.01); H02J 7/04 (2006.01)
CPC H02J 7/0024 (2013.01) [H02J 7/0016 (2013.01); H02J 7/0048 (2020.01); H02J 7/007182 (2020.01); H02J 7/04 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A battery control unit comprising:
a switching unit configured to be provided for each of a plurality of batteries connected in series to each other, and switch between a connection state in which the corresponding battery is discharged and a non-connection state in which the corresponding battery is not discharged;
a first control unit configured to switch the battery to the non-connection state in order from the battery whose remaining dischargeable capacity reaches a predetermined value;
a second control unit configured to switch all the batteries to the connection state after the remaining dischargeable capacity of all the batteries reaches the predetermined value, and then switch the battery to the non-connection state in order from the battery determined to reach a discharge termination state; and
a discharge current limitation unit configured to limit a discharge current flowing through the battery in the connection state so as not to exceed a minimum discharge current limitation value that is smallest among discharge current limitation values determined according to each battery state of the batteries in the connection state,
wherein the predetermined value is set to a value so that the remaining dischargeable capacity reaches the predetermined value before the discharge current limitation unit limits the discharge current.