DEGRADATION ESTIMATION METHOD, DEGRADATION ESTIMATION SYSTEM, AND DEGRADATION ESTIMATION PROGRAM

摘要

According to an embodiment, a degradation estimation method includes detecting a stop interval of a battery control apparatus having a function to calculate a state of charge of a battery, acquiring degradation information corresponding to a calculated state of charge calculated from the battery and a detection temperature detected from the battery or degradation information corresponding to the calculated state of charge and an ambient temperature based on a first degradation information database showing degradation of the battery in accordance with a set state of charge and a set temperature, and estimating the degradation of the battery in the stop interval based on the degradation information acquired.

主权项

1. A degradation estimation method comprising:
obtaining duration information of a non-operational state of a battery control apparatus having a function to calculate a state of charge of a battery; determining first or second degradation information in accordance with a self-discharged amount of the battery based on a degradation information database including degradation of the battery in accordance with a set state of charge and a set temperature; and estimating the degradation of the battery in a non-operational state based on the first or second degradation information, wherein the first degradation information is determined based on a combination of (i) a calculated state of charge when the battery control apparatus is in the non-operational state and (ii) one of a maximum value, a minimum value, and an average value of a temperature of the battery detected when the battery control apparatus is in the non-operational state, and the second degradation information is determined based on a combination of (i) one of the calculated state of charge when the battery control apparatus is in the non-operational state, the calculated state of charge when the battery control apparatus is restarted, and an average state of charge of the calculated state of charge when the battery control apparatus is in the non-operational state and the calculated state of charge when restarted and (ii) one of the maximum value, the minimum value, and the average value of the temperature of the battery detected when the battery control apparatus is in the non-operational state.