초록 ▼

A capacity detection method for use with a secondary battery is provided which is capable of accurately detecting capacity by a voltage method by taking into consideration the polarization characteristics of a secondary battery, such as a lithium-ion secondary battery. When the capacity of a seconda

A capacity detection method for use with a secondary battery is provided which is capable of accurately detecting capacity by a voltage method by taking into consideration the polarization characteristics of a secondary battery, such as a lithium-ion secondary battery. When the capacity of a secondary battery is to be detected, this capacity detection method uses a voltage method in which the voltage of a secondary battery is measured and the capacity of the secondary battery is computed on the basis of the correlation between the voltage and the capacity of the secondary battery. A voltage and capacity correlation table of the secondary battery is prepared. The voltage of the secondary battery in the correlation table is adjusted by taking the polarization characteristics into consideration, and the capacity of the secondary battery is detected on the basis of the adjusted voltage of the secondary battery. The polarization characteristics are obtained by using a moving average of a current value of the battery.

대표청구항 ▼

[ What is claimed is:] [1.] A battery capacity detection method for detecting the capacity of a battery from a detected voltage of the battery on the basis of a correlation between the voltage of the battery and the capacity of said battery, said battery capacity detection method comprising the step

[ What is claimed is:] [1.] A battery capacity detection method for detecting the capacity of a battery from a detected voltage of the battery on the basis of a correlation between the voltage of the battery and the capacity of said battery, said battery capacity detection method comprising the steps of:a battery voltage detection step of detecting the voltage of a battery;a battery voltage adjustment step of adjusting said detected voltage on the basis of the polarization characteristics possessed by a battery, and obtaining the adjusted battery voltage; anda battery capacity detection step of determining the capacity of said battery from said adjusted battery voltage on the basis of said correlation between the voltage of the battery and the capacity of said battery,wherein,said battery voltage adjustment step obtains said polarization characteristics by using the moving average of a current value of said battery.