Charging and discharging of lithium batteries and their safety performance are one of the key indicators to determine their working ability. The state monitoring system of lithium battery pack designed in this paper not only fully meets the requirements of production, but also fully reflects the characteristics of reliability and cost-effective ratio. The system is based on single chip computer control, and fully considers charge and discharge signal monitoring, temperature signal monitoring, discharge maintenance and charge equalization in the design. In addition, the system can also realize voltage and current overload protection during battery charging and discharging, short circuit protection under various working conditions, temperature overload protection, open circuit protection of information acquisition system, etc. Through debugging and testing of the system, it shows that the system has high accuracy and reliability.
