Accurate battery model can predict the performance parameters of the battery system, the battery system design, optimization and control problem. Many domestic and foreign scholars have conducted research on the battery model battery recycling, and achieved some results, but mainly for the study of cell or module, modeling studies on large-capacity battery system is nearly blank. Battery system consists of m parallel battery strings from battery recycling prices, each battery string consists of n cell or module series. From the current research situation at home and abroad, the above various methods on SOC estimation is still mainly used in small-capacity battery system for large-capacity battery system SOC estimation module is often used with single or same traditional SOC estimation method, however, due to large-capacity battery system contains a large number of battery cells, and the performance parameters of each cell, showed a non-linear operating characteristics recycle the old battery, these conventional methods estimation precision will be greatly reduced, and therefore, large-capacity battery system related SOC Accurate estimation urgent further study. Nickel Battery Recycling | Fukuda Battery Recycling | East in mind renewable resources by Dongguan Chang Ping Tung Kee provide renewable resource recycling. Dongguan Chang Ping Tung Kee renewable resource recycling (www.dongji8.com) strong, credible, in Dongguan, Guangdong scrap recycling industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the East in mind renewable resources into the brilliant and you work for a better future!