The technique for estimating the degradation of batteries can determine the degree of degradation and calculate the usable electric energy of power batteries rapidly. This technique utilizes specific procedures to charging/discharging the batteries for finding gradual change in the cells. The deference between the end of charge/discharge voltage and the resting voltage varies with the usage of batteries. As a result, the degradation characteristic can be decided quickly, and the available capacity can be predicted accurately.

Estimation error < 20%

This technique can be applied in various electric vehicles and battery exchange stations.

The method for estimating the degradation of batteries is the key technique for various battery-powered electric devices. ARTC has established the battery diagnostic and estimating techniques in electric vehicles application. The establishment can help domestic system manufacturers have capabilities of developing the key technique of battery management systems and make their products become more competitive.