Lithium ion battery equalization charging system

The invention discloses a lithium ion battery equalization charging system which is composed of an AC-DC switch power supply, a DC-DC power supply converter, a VI sampling amplifying circuit, a CON charging control circuit and a BATT battery. According to the utility model, real-time voltage and current sampling and amplifying are carried out on the battery; the charging control circuit compares two data and set parameters, carries out processing, and communicates with the DC-DC power supply to form closed loop management, so as to accurately control the charging process of the battery (group). Electrical isolation is carried out on the AC-DC power supply, which ensures safety in the processes of production, debugging and use. Through precise closed-loop control, the reliability of the charging process is improved. The modular structure is suitable for different numbers of battery packs connected in series. The lithium ion battery equalization charging system is multipurpose, and design, manufacturing and purchasing cost can be reduced.