| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus and method for measuring a battery cell voltage using an isolation capacitor.SOLUTION: The apparatus for measuring a battery cell voltage includes: a battery pack 200 having a cell group; a first switching unit 310 for selectively connecting both terminals of each cell to a first conductive line 1 and a second conductive line 2; a first voltage charging unit 320 connected between the first conductive line 1 and the second conductive line 2 to primarily charge a cell voltage; a second voltage charging unit 330 for relaying the charged voltage stored in the first voltage charging unit for secondary charging; a cell voltage sensing unit 400 for sensing the voltage charged in the second voltage charging unit; and a second switching unit 340 for interconnecting the first and second voltage charging units in a charged voltage relaying mode and isolating the first and second voltage charging units in a charged voltage sensing mode. Thus, isolation between a high voltage battery and a voltage sensing unit can be achieved, and voltage sensing of a high voltage battery cell is possible even in a component with a low withstanding voltage. |
