LITHIUM BATTERY MODULE PARALLEL USING METHOD AND SYSTEM

摘要

A lithium battery module parallel using method and system are provided. The method comprises: collecting a voltage value of each lithium battery module when initially electrifying (S1); based on information collected, controlling a voltage difference between the lithium battery module and the bus in accordance with a voltage sharing mode and orderly inserting the lithium battery module with a minimal voltage difference into the bus (S2); charging or discharging the lithium battery module after the lithium battery module is inserted into the bus (S3). The method can maintain the voltage difference of the lithium battery module in a certain range for inserting the module in a parallel manner, reduce the voltage difference in the interior-group, avoid high current impact between the battery groups, reduce damages of the battery management system (BMS) circuit, and improve the safety of the lithium battery module by using parallelly.