公开(公告)号：US10031190B2

公开(公告)日：2018-07-24

申请号：US14264195

申请日：2014-04-29

Applicant: DENSO CORPORATION

Inventor： Syota Nakamura ,  Junichi Fukuta

IPC: G01D18/00 ,  G01R31/42 ,  G01R19/00

CPC classification number: G01R31/42 ,  G01R19/0084

Abstract: A voltage detection device controls operation of system main relays to change an applied voltage supplied to detection circuits. An error of each of the detection circuits is corrected on the basis of a detection value of each of the detection circuits when the applied voltage is changed. In particular, an offset value is corrected on the basis of a detection value of each of the detection circuits when the system main relays and booster switches are controlled so that a voltage of a high voltage battery supplied to each of the detection circuits becomes zero. A gain error is further corrected on the basis of a detection value of each of the detection circuits when the system main relays and the booster switches are controlled so that the applied voltage supplied to each of the detection circuits becomes equal to the voltage of the high voltage battery.