US 12,485,764 B2
Method for discharging at least one battery cell of a battery and control device
Michael Schimpe, Munich (DE)
Assigned to AUDI AG, Ingolstadt (DE)
Filed by AUDI AG, Ingolstadt (DE)
Filed on Sep. 22, 2022, as Appl. No. 17/950,257.
Claims priority of application No. 102021124474.9 (DE), filed on Sep. 22, 2021.
Prior Publication US 2023/0088976 A1, Mar. 23, 2023
Int. Cl. H01M 10/44 (2006.01); B60L 3/04 (2006.01); B60L 50/60 (2019.01); B60L 55/00 (2019.01); B60L 58/10 (2019.01); H01M 10/46 (2006.01); H02J 7/00 (2006.01)
CPC B60L 3/04 (2013.01) [B60L 50/60 (2019.02); B60L 55/00 (2019.02); B60L 58/10 (2019.02); H02J 7/0013 (2013.01); H02J 7/0029 (2013.01); H02J 7/0063 (2013.01); H02J 7/007192 (2020.01)] 15 Claims
OG exemplary drawing
 
1. A method for discharging at least one battery cell of a battery for a motor vehicle in an event of at least one specific detected fault concerning the battery, comprising the steps:
detecting the specific fault; and
depending on the detection of the fault, initiating an emergency discharge process for at least partially discharging the at least one battery cell;
wherein the at least one battery cell is at least partially discharged during the emergency discharge process via at least one on-board electrical consumer of the motor vehicle external to the battery and/or a power supply system external to the motor vehicle,
wherein before the emergency discharge process, a determination is made whether a charger on a vehicle side is coupled to the power supply system, and if the charger is coupled to the power supply system, the emergency discharge process is carried out so that the at least one battery cell is at least partially discharged by the charger by feeding battery current into the power supply system.