HEATING CONTROL SYSTEM AND HEATING CONTROL METHOD

A heating control system includes a three-phase inverter configured to be driven using electric power of a lithium ion secondary battery, a control unit configured to heat the lithium ion secondary battery by supplying current generated by the three-phase inverter to the lithium ion secondary battery, a high-frequency signal supply unit configured to supply a high-frequency signal with a frequency of 0.1 MHz or higher to the lithium ion secondary battery, a detecting unit configured to detect a value of a real part of alternating-current impedance from the lithium ion secondary battery to which the high-frequency signal has been supplied, and a calculation unit configured to calculate an amount of Li deposition in the lithium ion secondary battery from the detected value of the real part of alternating-current impedance.