Evaluation method of secondary battery

A durability evaluation method of a secondary battery, the durability evaluation method comprising:

• a durability step of continuing to apply an alternating current voltage of a durability frequency to a first secondary battery for evaluation over a durability test period, a temperature and a state of charge (SOC) of the first secondary battery being adjusted to a first temperature and a first SOC, respectively;
• a determination step of determining whether the durability test period has elapsed;
• and based on the determination that the durability test period has elapsed, an evaluation step of evaluating durability of an associated battery reaction associated with the durability frequency from among battery reactions of the first secondary battery.