| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery voltage detection circuit using a multiplexer system, in which an influence of detection voltage differences due to parasitic capacitance is reduced and detection voltage accuracy is improved.SOLUTION: The battery voltage detection circuit for monitoring the voltages of a plurality of series-connected batteries comprises: a flying capacitor; a multiplexer switch sequentially connecting the flying capacitor to the plurality of batteries; voltage detection means detecting a voltage of the flying capacitor; first reference potential connection means connected to one terminal of the flying capacitor; second reference potential connection means connected to the other terminal of the flying capacitor; and a control circuit controlling the multiplexer switch, the first reference potential connection means and the second reference potential connection means. |
