A battery test apparatus 1 includes an enclosed battery holder 4 which detachably holds a secondary battery 3, a thermostatic oven 2 in which the battery holder 4 is held, and a charge and discharge test device 7 which charges and discharges the secondary ...

Provided is a secondary battery capacity estimation system that can efficiently estimate the capacity of a secondary battery from the state of an internal resistance of the secondary battery even when the usage history of the secondary battery is different...