The development of lithium ion batteries can reduce the energy waste and air pollution. For this purpose， lithium battery management system based on the MAX11068 chip is designed. The management system includes voltage acquisition and equalization module, MCU and peripheral module, temperature acquisition module, current acquisition module and communication module. The function of each module and the balance between the single batteries are analyzed in detail. The management system can achieve real time monitoring of voltage and current of the lithium ion battery.