PCS power conversion system is a device composed by power electronic conversion device, which is connected to the battery and the AC grid system is a key component of the BESS energy exchange with the outside world. BESS PCS as a core part of its main features include: First two different operating modes (grid pattern, solitary network mode) charging and discharging of the battery system functions and to switch between the two modes; the second is through the control BESS strategy to achieve the four-quadrant operation, the system provides two-way controlled active and reactive power, to achieve system active and reactive power balance; Third, through the relevant control strategy battery recycling system, advanced applications, such as black start, clipping valley fill, smooth power, low-voltage ride through, etc; four are based PCS topologies (such as single-stage AC / DC, dual-stage AC / DC + DC / DC, parallel single-stage, two-stage parallel cascade multi-level structure ), to achieve the system voltage and battery state of charge balance management by the relevant control strategies. In short, PCS BESS as the most important part of the control strategy and achieve its experimental platform is one of the key research content of this article. Accurate battery model can predict the performance parameters of the battery system, the battery system design, optimization and control problem. Many scholars at home and abroad on the battery model has been studied in Zhanjiang battery recycling, and achieved certain results Changde battery recycling, but mainly for the study of cell or module, modeling studies on large-capacity battery system is nearly blank. Battery system consists of m cell strings connected in parallel, each battery string consisting of n battery cells or modules in series. Hainan battery recycling, battery recycling, renewable resources by the East in mind 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!