US 11,999,262 B2
Battery control assembly for a battery system and electric drivetrain for an electric vehicle
Torbjorn Larsson, Gothenburg (SE); Jonas Forssell, Gothenburg (SE); Robert Eriksson, Gothenburg (SE); Nikitas Sidiropoulos, Gothenburg (SE); Markus Ekström, Gothenburg (SE); Narendar Rao Gannamaneni, Gothenburg (SE); Jonas Björkholtz, Gothenburg (SE); and Yafan Zhang, Gothenburg (SE)
Assigned to Volvo Car Corporation, Gothenburg (SE)
Filed by Volvo Car Corporation, Gothenburg (SE)
Filed on Dec. 5, 2022, as Appl. No. 18/074,593.
Claims priority of application No. 21212610 (EP), filed on Dec. 6, 2021.
Prior Publication US 2023/0173948 A1, Jun. 8, 2023
Int. Cl. B60L 58/18 (2019.01); B60L 53/22 (2019.01); H01M 10/46 (2006.01); H02J 7/00 (2006.01)
CPC B60L 58/18 (2019.02) [B60L 53/22 (2019.02); H01M 10/46 (2013.01); H02J 7/0045 (2013.01); H02J 7/0063 (2013.01); H01M 2220/20 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A battery control assembly for a battery system, the battery control assembly comprising:
a plurality of cell-level control units, each of the cell-level control units being electrically connectable to an associated single battery cell or to an associated group of battery cells, and each of the cell-level control units comprising a cell-level switching unit being operable as a cell-level inverter,
the plurality of cell-level control units being arranged in three control unit strings, the cell-level control units of each control unit string being electrically connected in series, and each of the control unit strings comprising a first end and a second end, the second end being arranged electrically opposite the first end,
the first end of each control unit string being electrically connected to a corresponding AC charging terminal,
the second ends of the three control unit strings being electrically connected in series via a first end switch and a second end switch, and
at least one of the control unit strings comprising an inner connection terminal being arranged such that at least one cell-level control unit forming part of the respective control unit string is arranged on each side of the inner connection terminal, the inner connection terminal being connectable to a DC charging or discharging terminal or a further inner connection terminal.