Circuit and method for balancing battery cells
Embodiments of the invention provided circuits and methods for balancing battery cells. According to a first embodiment, a cell balancing circuit includes an auxiliary current path for controlling a conductance status of a shunt path. According to a second embodiment, a cell balancing circuit utilizes a total voltage of multiple neighboring cells in a battery pack to generate a current. Based on the current, a voltage drop is generated to conduct a shunt path corresponding to one cell of the neighboring cells. According to a third embodiment, a cell balancing circuit utilizes a total voltage of multiple neighboring cells in a battery pack to generate a current. Based on the current, a voltage drop is generated to conduct a shunt path corresponding to one cell of the neighboring cells. The cell balancing circuit can turn on multiple internal switches at the same time to balance multiple neighboring cells simultaneously.
O2Micro Inc.
H
H02J
inventional
Guoxing
Li