US 12,072,391 B2
Method for controlling a charging current limiting value for a battery management system, battery management system
Olivier Cois, Kernen (DE); Aleksandar Aleksandrov, Stuttgart (DE); Christoph Kroener, Freiberg am Neckar (DE); Jens Becker, Benningen am Neckar (DE); Melwin Pascal Watterott, Bissingen an der Teck (DE); Triantafyllos Zafiridis, Heilbronn (DE); and Vincent Scharff, Stuttgart (DE)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Filed by Robert Bosch GmbH, Stuttgart (DE)
Filed on Aug. 15, 2022, as Appl. No. 17/887,986.
Claims priority of application No. 102021208940.2 (DE), filed on Aug. 16, 2021.
Prior Publication US 2023/0049272 A1, Feb. 16, 2023
Int. Cl. G01R 31/396 (2019.01); G01R 31/36 (2020.01); H02J 7/00 (2006.01)
CPC G01R 31/396 (2019.01) [G01R 31/3648 (2013.01); H02J 7/0048 (2020.01); H02J 7/00716 (2020.01); H02J 7/007194 (2020.01)] 9 Claims
OG exemplary drawing
 
1. A method for controlling a charging current limiting value for a battery management system, comprising the following steps:
Determination, for a measured temperature Tsens and a prescribed state of charge SOC, of reference currents iref for various time intervals tref;
Calculation of a corresponding reference time constant τref for each reference current iref by the application of a model for the calculation of a mean value iavrg of a charging current ireq with reference to a continuous current icont, which corresponds to the minimum current permissible without lithium plating;
Constitution of a diagram for the relationship between the reference time constant τref and the reference current iref, with reference to the calculated reference time constants τref and the reference currents iref determined for each specific temperature T and each specific state of charge SOC;
Determination of a predictive time constant τpred by the comparison of a measured value isens of a charging current ireq with the reference currents iref; and
Calculation of a predictive limiting mean value ipred of the charging current ireq, on the basis of the continuous current icont, a predictive time tpred and the predictive time constant τpred.