公开(公告)号：US20190312444A1

公开(公告)日：2019-10-10

申请号：US16360538

申请日：2019-03-21

申请人： O2Micro, Inc.

发明人： Guoxing LI

IPC分类号： H02J7/00

摘要： A balance circuit for a set of battery cells includes a set of switch circuits and control circuitry coupled to the switch circuits. Each switch circuit of the switch circuits is coupled to a corresponding battery cell of the battery cells, and enables a bypass current to flow out a positive terminal of the corresponding battery cell if the switch circuit is turned on. The switch circuit includes a first switch having a first diode and a second switch having a second diode reversely coupled to the first diode. The second switch disables the bypass current if the second switch is turned off The control circuitry balances the battery cells by controlling the switch circuits.