Li-ion battery, with the advantage as small size, large power density, high individual voltage, low self-discharge rate, and low internal resistor so on, substitutes the traditional power battery used in AGV system. In the practical application, Li-ion battery discharge with large current after a period of time, the upper voltage of every cell will be non-consistency, and the power system will work abnormally. In the case, the intelligent management of li-ion battery is designed.Experiment result improves that the system can effectively protect the li-ion battery and realize the energy feedback.