Battery Management System

The invention relates to a battery management system. The battery management system comprises a CPU, a battery temperature collection unit, a battery voltage collection unit, a battery current collection unit, a battery protection unit, a heat management control unit, a module voltage collection unit and an electronic switch unit, wherein the battery temperature collection unit, the battery voltage collection unit and the battery current collection unit are connected with the CPU and a battery pack respectively; the battery pack is connected with the module voltage collection unit through the electronic switch unit; the module voltage collection unit is connected with the CPU; the CPU is connected with the heat management control unit and the battery protection unit respectively; and the battery protection unit is connected with the battery pack. The battery management system also comprises a wireless communication module, an alarm unit and a CAN communication interface connected with the end of a PC. The battery management system can monitor the working condition of batteries, calculates the SOC (State of Charge) of the battery pack, and avoids overdischarge, overcharge and overheat, so that the storage capacity and cycle life of the batteries are utilized to the maximum extent.