Battery management system

Abstract

A battery management system according to the present disclosure includes at least: a three-phase inverter configured to be driven by electric power from a lithium-ion secondary battery; a control unit configured to heat the lithium-ion secondary battery by supplying, to the lithium-ion secondary battery, an alternating current signal of a predetermined frequency generated by the three-phase inverter; and an impedance detection unit configured to detect, from an attenuation characteristic of a high-frequency signal in the lithium-ion secondary battery, a value of the real part of an alternating current impedance used for calculation of the amount of Li deposition. The impedance detection unit is configured to detect a peak voltage of the alternating current signal supplied from the three-phase inverter to the lithium-ion secondary battery.

Dependencies are inferred from the claim text.