Information processing apparatus, information processing method, information processing system, and non-transitory computer readable medium

An information processing method, comprising:

• calculating, based on measured data of a voltage value and a charge amount of a rechargeable battery which is controlled for charge/discharge according to a charge/discharge command value, first information indicating a change of the voltage value with respect to the charge amount;
• acquiring second information indicating a reference change of a voltage value with respect to a charge amount in accordance with a range of the voltage values in the measured data;
• and
• estimating a state of the rechargeable battery based on the first information and the second information.

A non-transitory computer readable medium having a computer program stored therein which causes a computer to perform processes, comprising:

• calculating, based on measured data of a voltage value and a charge amount of a rechargeable battery which is controlled for charge/discharge according to a charge/discharge command value, first information indicating a change of the voltage value with respect to the charge amount;
• acquiring second information indicating a reference change of a voltage value with respect to a charge amount in accordance with a range of the voltage values in the measured data;
• and
• estimating a state of the rechargeable battery based on the first information and the second information.