公开(公告)号：US09977092B2

公开(公告)日：2018-05-22

申请号：US14744414

申请日：2015-06-19

Applicant: DENSO CORPORATION

Inventor： Masahiro Inoue ,  Hayato Mizoguchi ,  Takeshi Iida ,  Hiroki Kobayashi

IPC: G01N27/416 ,  G01R31/36 ,  G01R35/00 ,  G01R19/165 ,  G01R31/02

CPC classification number: G01R31/3658 ,  G01R19/16542 ,  G01R31/02 ,  G01R35/00

Abstract: A voltage monitoring device has a capacitor circuit having capacitors connected in series, first switches connecting end terminals of the capacitor circuit to specific electrode terminals of unit cells in a battery pack, second switches connecting remaining electrode terminals of the unit cells to the connection nodes between the capacitors, first voltage detection sections corresponding to each of the capacitors, a second voltage detection section connected to the end terminals of the capacitor circuit, and a microcomputer which selectively performs a first process of charging each capacitor, and a second process of charging the capacitors simultaneously. The respective specific electrode terminals correspond to the unit cells, and are arranged at an interval corresponding to the number of connection nodes formed between the capacitors. The microcomputer performs a polarity switching process of adjusting for the adjacent capacitors to have a same polarity of the charged voltage before performing the second process.