Patent ID: 9645199
Date: 2017-05-09
CPC Classifications: B60L,G01R,H01M,H02J,Y02E,Y02T

Claim:
1. An integrated circuit device provided at each of a plurality of battery cell groups of a battery system including a battery cell array including the plurality of battery cell groups, the integrated circuit device comprising a measuring unit configured to measure a voltage of one of the battery cell groups, wherein: the measuring unit performs current communication with a measuring unit of an adjacent integrated circuit device through a communication channel; and when the measuring unit is a measuring unit at a high potential side in relation to the measuring unit of the adjacent integrated circuit device, and the measuring unit of the adjacent integrated circuit device is a measuring unit at a low potential side, a current generated by a potential difference between a power supply voltage input to the measuring unit at the low potential side and a reference voltage input to the measuring unit at the high potential side is not inut to the measuring unit at the high potential side, but a reverse current in a direction opposite to a current communication direction is input to the measuring unit at the high potential side.