Energy storage device managing apparatus, energy storage apparatus, photovoltaic power generating system, degradation amount estimating method, and computer program

An energy storage device managing apparatus that estimates a degradation amount of a full charge capacity of an energy storage device, the energy storage device managing apparatus comprising:

• a measurement unit that measures a temperature of the energy storage device in a power supply state in which power is supplied to the energy storage device managing apparatus;
• a timing unit that measures time in a power non-supply state in which the power is not supplied to the energy storage device managing apparatus;
• and
• a controller,
• wherein the controller performs interpolation based on a first temperature measured immediately before the energy storage device becomes the power non-supply state, and
• wherein the controller decides the temperature in each predetermined sampling time in a period from the measurement time of the first temperature to the measurement time of the second temperature, and estimates the degradation amount of the full charge capacity by deciding the degradation amount in each predetermined sampling time based on the temperature in each predetermined sampling time.

A computer program estimating a degradation amount of a full charge capacity in an energy storage device causes a computer to perform:

• acquiring a first temperature measured immediately before the energy storage device becomes a power non-supply state and a second temperature initially measured after the energy storage device returns to a power supply state;
• performing interpolation based on the first temperature and the second temperature;
• deciding a temperature of the energy storage device in each predetermined sampling time from a measurement time of the first temperature to a measurement time of the second temperature;
• and
• estimating the degradation amount of the full charge capacity in each predetermined sampling time based on the decided temperature in each predetermined sampling time.