| 摘要 |
The invention describes A battery cell measurement system comprising a signal generator coupled to a pulse density modulation circuit (PDM), the pulse density modulation circuit generating a control signal which drives a switch, the switch being connected between a first terminal of the battery cell and a first terminal of a bleeding impedance (L bal ), a second terminal of the bleeding impedance (L bal ) being coupled to a second terminal of the battery cell. The first terminal of the bleeding impedance (L bal ) is coupled to a first terminal of a second switch. The second terminal of the bleeding impedance (L bal ) is coupled to a first terminal of a third switch. A second terminal of the second switch and second terminal of the third switch are coupled to each other and further coupled to a low-pass filter (LPF). A signal generated by the low-pass filter (LPF) is inputted into an analog to digital converter (ADC), the analog to digital converter providing a signal which is representative either for a signal across the bleeding impedance (L bal ), or for a signal between the terminals of the battery cell.
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