TWO-WAY DIRECT BALANCE CIRCUIT FOR SERIES CELLS

摘要

In a two-way direct balance circuit for series cells, a control unit activates a pulse generator to transmit high frequency switch control signals, and a flyback converter is utilized to perform electromagnetic transition between the cells that rapidly conveys power from the cells with high RSOC to the flyback converter and to the cells with low RSOC. The direct energy transfer between cells provides fast and highly efficient performance.

主权项

1. A two-way direct balance circuit for series cells, comprising:
a flyback converter; a first cell coupled to the flyback converter with coil, a first switch coupled between the first cell and the flyback converter; a second cell connected in series connection to the first cell and coupled to the flyback converter with coil, a second switch coupled between the second cell and the flyback converter; a control unit coupled to the first switch and the second switch; and a pulse generator coupled to the control unit, the first switch, and the second switch and utilized for generating a first pulse signal and a second pulse signal complementary to each other, the first pulse signal determining the turn-on frequency of the first switch and the second pulse signal determining the turn-on frequency of the second switch; wherein when the relative state of capacity (RSOC) of the first cell is greater than the RSOC of the second cell, the control unit is utilized to activate the pulse generator such that the first pulse signal turns on the first switch and the flyback converter is utilized to convert electrical energy of the first cell into magnetic energy, and the second pulse signal turns on the second switch and the flyback converter is utilized to convert magnetic energy into electrical energy as a power supply for the second cell.