Patent ID: 8129995
Filing Date: 2012-03-06
Classification: G01R

Abstract:
1. An apparatus for measuring a battery cell voltage using an isolation capacitor, comprising: a battery having a cell group; a first switching unit for connecting or disconnecting both terminals of each battery cell of the cell group to/from first and second conductive lines; a first voltage charging unit connected between the first and second conductive lines to primarily charge a cell voltage; a second voltage charging unit electrically connected to the first voltage charging unit for relaying the charged voltage discharged from the first voltage charging unit such that the relayed voltage is secondarily charged to the second voltage charging unit; a second switching unit for connecting the first and second voltage charging units in a charged voltage relaying mode and isolating the first and second voltage charging units from each other in a charged voltage sensing mode; and a cell voltage sensing unit for sensing the voltage charged in the second voltage charging unit while the first and second voltage charging units are isolated from each other in the charged voltage sensing mode.