US 12,463,429 B2
Power management system
Shunsuke Kobuna, Mishima (JP); Masato Ehara, Gotenba (JP); and Yusuke Horii, Nagoya (JP)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Feb. 6, 2024, as Appl. No. 18/433,699.
Claims priority of application No. 2023-062003 (JP), filed on Apr. 6, 2023.
Prior Publication US 2024/0339838 A1, Oct. 10, 2024
Int. Cl. H02J 3/32 (2006.01); B60L 53/68 (2019.01); B60L 55/00 (2019.01); H02J 3/00 (2006.01); H02J 3/38 (2006.01)
CPC H02J 3/322 (2020.01) [B60L 53/68 (2019.02); B60L 55/00 (2019.02); H02J 3/003 (2020.01); H02J 3/004 (2020.01); H02J 3/38 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A power management system comprising: a central processing unit (CPU) configured to:
for each of a predetermined plurality of time periods within a predetermined time range,
acquire a predicted amount of power generation (Wgest) of a power generation system,
acquire a predicted power demand (Wpd) of an electrical grid,
acquire a reliability value (R) indicating a reliability of the predictions for Wgest and Wpd,
acquire a current sum state-of-charge (SOCt) of batteries mounted on a plurality of vehicles,
determine a charge-and-discharge instruction amount (Wc*) for each of the predetermined plurality of time periods, by utilizing a formula: an objective function F=Σ(Wc*/R) in constraints that the SOCt does not exceed an upper limit value (SOCtmax) or falls below a lower limit value (SOCtmin), which are determined by summing SOCtmax and SOCtmin of the batteries mounted on the plurality of vehicles,
charge the batteries in a case where a predicted charge-and-discharge amount (Wcest)=Wgest−Wpd=positive,
discharge the batteries in a case where the predicted charge-and-discharge amount (Wcest)=Wgest−Wpd=negative, and
not to charge or discharge the batteries in a case where the predicted charge-and-discharge amount (Wcest)=Wgest−Wpd=0,
such that the F is minimized,
wherein the Wgest is determined in advance based on a first relationship between date, weather, temperature and the amount of power generation of the power generation system,
the Wpd is determined in advance based on a second relationship between date, weather, temperature and the power demand for the electrical grid.