公开(公告)号：US09722437B2

公开(公告)日：2017-08-01

申请号：US14623805

申请日：2015-02-17

Applicant: SILICON WORKS CO., LTD.

Inventor： Jae Wan Kim ,  Myoung Soo Song ,  Jin Kook Yun

IPC: H02J7/00

CPC classification number: H02J7/0016

Abstract: Provided are balancing device and method which can achieve a balancing function between energy storage units connected in series using a small number of switch elements, thereby reducing the manufacturing cost and size and enabling various balancing modes. The balancing device for balancing between a plurality of energy storage units a battery module, in which the energy storage units are connected in series, includes: a transformer; and a switch network comparing a cell switch unit, a polarity switch unit, and au auxiliary switch unit, wherein the auxiliary switch unit includes: a first auxiliary switch unit for connecting a second common node to one terminal of the secondary winding of the transformer; and a second auxiliary switch unit for connecting a first common node to the other terminal of the secondary winding of the transformer.