公开(公告)号：US09812743B2

公开(公告)日：2017-11-07

申请号：US14753722

申请日：2015-06-29

Applicant: Seiko Instruments Inc.

Inventor： Toshiyuki Koike ,  Kazuaki Sano ,  Atsushi Sakurai ,  Hiroshi Mukainakano

IPC: H02J7/00 ,  H02J7/04 ,  G01N27/416 ,  H01M10/48 ,  G01R31/36 ,  H01M10/44

CPC classification number: H01M10/48 ,  G01R31/3606 ,  G01R31/3662 ,  H01M10/44

Abstract: Provided is a battery state monitoring circuit and a battery device capable of predicting a state of charge of a secondary battery with high accuracy. The battery state monitoring circuit includes a pseudo-equivalent circuit of the secondary battery, and causes a current flowing through a sense resistor to flow to the pseudo-equivalent circuit of the secondary battery, to thereby measure a pseudo-open circuit voltage of the secondary battery.