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Voltage measurement for multiple cell battery pack

  • US 9,910,095 B2
  • Filed: 12/14/2015
  • Issued: 03/06/2018
  • Est. Priority Date: 12/13/2012
  • Status: Expired due to Fees
First Claim
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1. A method for detecting a voltage of a rechargeable battery set in an apparatus, the apparatus including a square wave generator, a first circuit that has a resistor, a capacitor and the rechargeable battery set, and a second circuit that has a resistor and a capacitor matching the equivalent, components in the first circuit, the method comprising the steps of:

  • generating a wave form with a positive phase and a negative phase by the square wave generator;

    sending the wave form to the first circuit, wherein the positive phase of the wave form flows a first loop from the resistor to the capacitor and to the positive side of the rechargeable battery set, and the negative phase of the wave form flows a second loop from the negative side of the battery set toward the capacitor and then the resistor;

    sending the wave form to the second circuit;

    driving a matching voltage in the second circuit to become equivalent to the voltage of the rechargeable battery set; and

    measuring the matching voltage as the battery voltage.

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