Battery type determination system, method for determining battery type, and storage medium

A method for determining a battery type comprising:

• outputting a variable-frequency AC signal;
• a resonance state detecting step of detecting at least one resonance state based on a peak of a resonance current or a resonance voltage caused by an inductance component of a battery and a capacitance component of a capacitor circuit in response to the AC signal, the capacitor circuit including a first capacitor connected in parallel with a battery and a second capacitor connected in series with the battery, the capacitor circuit including a variable capacitance realized by selectively connecting one or more capacitors via switches;
• a resonance characteristic detecting step of detecting a resonance frequency for each of a plurality of capacitance values of the capacitor circuit and generating a resonance-characteristic vector comprising the detected frequencies;
• and
• a determining step of determining whether the battery is of a same type as a reference battery by comparing the resonance-characteristic vector with a reference resonance characteristic stored in a calibrated database and using a predetermined threshold-based decision rule.

A computer-readable non-transitory storage medium which stores a program that causes a computer to execute:

• detecting at least one resonance state based on a peak of a resonance current or a resonance voltage caused by an inductance component of a battery and a capacitance component of a capacitor circuit in response to a variable-frequency AC signal, the capacitor circuit including a first capacitor connected in parallel with a battery and a second capacitor connected in series with the battery, the capacitor circuit including a variable capacitance realized by selectively connecting one or more capacitors via switches;
• detecting a resonance frequency for each of a plurality of capacitance values of the capacitor circuit and generating a resonance-characteristic vector comprising the detected frequencies;
• and
• determining whether the battery is of a same type as a reference battery by comparing the resonance-characteristic vector with a reference resonance characteristic stored in a calibrated database and using a predetermined threshold-based decision rule.