Battery capacity estimation device, method and program

A battery capacity estimation method for estimating a maximum capacity of a secondary battery that has been charged under a charging condition that is specified by one or more condition variables,

• wherein one or a plurality of computers are configured to execute:
• an acquisition step of acquiring a standard variable value that indicates a standard charging condition for the secondary battery and a measurement variable value that indicates an actual charging condition obtained by measurement;
• and
• an estimation step of estimating the maximum capacity from a relationship between the acquired standard variable value and the acquired measurement variable value,
• wherein the estimation step calculates an apparent capacity using a uniform calculation method irrespective of change in the charging condition, and estimates the maximum capacity by adding, to the apparent capacity, a correction quantity obtained by using a deviation between the measurement variable value and the standard variable value.

A non-transitory computer readable storage medium storing a battery capacity estimation program for estimating a maximum capacity of a secondary battery that has been charged under a charging condition that is specified by one or more condition variables,

• wherein the program causes one or a plurality of computers to execute:
• an acquisition step of acquiring a standard variable value that indicates a standard charging condition for the secondary battery and a measurement variable value that indicates an actual charging condition obtained by measurement;
• and
• an estimation step of estimating the maximum capacity from a relationship between the acquired standard variable value and the acquired measurement variable value,
• wherein the estimation step calculates an apparent capacity using a uniform calculation method irrespective of change in the charging condition, and estimates the maximum capacity by adding, to the apparent capacity, a correction quantity obtained by using a deviation between the measurement variable value and the standard variable value.