Patent ID: 11899070
Assignee: VEHICLE ENERGY JAPAN INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  G  H  Y | IPC B  G  H

Claim 0:
1. A battery control apparatus, comprising:
a first circuit structured to acquire data indicative of a current flowing in a secondary battery from a current detector;
a concentration gradient estimator that estimates an ion concentration gradient in a diffusion layer formed around an interface between an electrode and an electrolyte of the secondary battery, based on the current flowing in the secondary battery, or on the current and a temperature of the secondary battery; and
an upper limit current determiner that determines an upper limit current value of the secondary battery, based on the ion concentration gradient,
wherein the upper limit current determiner determines the upper limit current value such that an overvoltage of the secondary battery according to the ion concentration gradient falls within a predetermined range; and
a second circuit structured to provide an instruction to limit at least one of charging or discharging the secondary battery based on the upper limit current value.