INDUCTIVE ENERGY STORAGE-BASED IMPROVED CIRCUIT FOR SERIES-CONNECTED BATTERY-PACK BIDIRECTIONAL LOSSLESS EQUALIZATION

摘要

Provided is an inductive energy storage-based improved circuit for series-connected battery-pack bidirectional lossless equalization; the series-connected battery pack is divided into left and right sections; the left section battery unit is a left battery pack, and the right section battery unit is a right battery pack. The head and tail ends of the series-connected battery pack are between a VCC and a GND; the batteries of the left and right sections are connected by means of an equalization circuit in the middle, and the equalization circuit is connected to a control circuit. By means of controlling the on/off of a bidirectional silicon controlled TRIAC in the equalization circuit and the inductance function of energy storage induction, the circuit can achieve dynamic equalization while the battery pack is charging or discharging, thus resolving the phenomenon of unequalization of a series-connected battery pack, improving the usable capacity of the battery pack, reducing the maintenance and replacement period of the series-connected battery pack, and extending the service life of the battery pack. Therefore the circuit is suitable for use in hybrid vehicles, pure-electric vehicles, or a battery management system of an energy storage device at an energy storage power station.