METHOD AND DEVICE FOR CONTROLLING TWO-WIRE DISCHARGE CIRCUIT OF BATTERY

摘要

A method and device for controlling a two-wire discharge circuit of a battery, introducing a whole-bus voltage outer loop and an inductive current average value or inductive current actual value closed loop as a main control loop of the two-wire discharge circuit of the battery so as to guarantee a stable voltage of the whole bus. On the basis of the main control loop, duty ratios of switch transistors (TA1, TA2; TB1, TB2; TC1, TC2) in respective discharge branches are adjusted to control the respective discharge branches to independently charge and discharge corresponding half-buses (BUS+, BUS-) so as to balance the bus voltage. The method and the device avoid accessing a central wire of the battery and any additional circuits, and satisfy a technical specification of a three-wire access of the battery, thereby improving a circuit performance of the two-wire discharge circuit of the battery.