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Battery voltage detector circuit

  • US 9,366,730 B2
  • Filed: 02/13/2014
  • Issued: 06/14/2016
  • Est. Priority Date: 02/15/2013
  • Status: Expired due to Fees
First Claim
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1. A battery voltage detector circuit adapted to monitor the voltages of a plurality of batteries connected in series, comprising:

  • a flying capacitor;

    a multiplexer switch that sequentially connects the flying capacitor to the plurality of batteries;

    a voltage detecting unit that detects the voltage of the flying capacitor;

    a first reference potential connecting unit connected to one terminal of the flying capacitor configured to generate a first current flow towards the one terminal;

    a second reference potential connecting unit connected to the other terminal of the flying capacitor configured to generate a second current flow towards the other terminal; and

    a control circuit that controls the multiplexer switch, the first reference potential connecting unit, and the second reference potential connecting unit, wherein the control circuit controls the first and second reference potentials to generate the first and second current flows towards the first and second terminal simultaneously during a portion of a voltage monitoring period.

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