US 12,322,767 B2
Battery management system and battery management method
Junta Izumi, Nagoya (JP); Kenji Kimura, Nagoya (JP); Masakazu Habu, Toyota (JP); Masanosuke Sufu, Toyota (JP); and Makito Muramatsu, Toyota (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Mar. 21, 2022, as Appl. No. 17/699,640.
Claims priority of application No. 2021-048293 (JP), filed on Mar. 23, 2021.
Prior Publication US 2022/0311063 A1, Sep. 29, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 10/44 (2006.01); B60L 58/10 (2019.01); G01R 31/3842 (2019.01); G01R 31/392 (2019.01); H01M 10/48 (2006.01); H01M 10/54 (2006.01)
CPC H01M 10/441 (2013.01) [B60L 58/10 (2019.02); G01R 31/3842 (2019.01); G01R 31/392 (2019.01); H01M 10/482 (2013.01); H01M 10/54 (2013.01); B60L 2210/10 (2013.01); B60L 2210/30 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A battery management system comprising:
a storage cabinet that stores a plurality of batteries;
a power converter electrically connected between the plurality of batteries stored in the storage cabinet and a power system and performs a bidirectional power conversion operation; and
a controller that controls the power converter in response to a demand response (DR) request from the power system so at to make the battery management system function as a virtual power plant (VPP), and evaluates a full charge capacity or an internal resistance of each of the plurality of batteries based on a voltage and a current of each of the plurality of batteries charged or discharged by the power converter, wherein
when the DR request is a power increase request, the controller controls the power converter to charge the plurality of batteries, and evaluates the full charge capacity or the internal resistance based on the voltage and the current obtained during the charging performed in response to the power increase request, and
when the DR request is a power decrease request, the controller controls the power converter to discharge the plurality of batteries and evaluates the full charge capacity or the internal resistance based on the voltage and the current obtained during the discharging performed in response to the power decrease request.