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Monitoring system and method

  • US 8,258,792 B2
  • Filed: 05/11/2009
  • Issued: 09/04/2012
  • Est. Priority Date: 05/11/2009
  • Status: Active Grant
First Claim
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1. A method for monitoring one or more batteries, comprising:

  • measuring a voltage of a first cell of a first battery using a first monitoring unit to generate a first measurement result, wherein measuring the voltage of the first cell of the first battery includes using a first reference voltage and simultaneously inputting the first reference voltage and a voltage generated in response to the voltage of the first cell into a first analog-to-digital (A/D) converter;

    measuring the first reference voltage using a controller to generate a second measurement result, wherein measuring the first reference voltage includes using a precise external reference voltage and simultaneously inputting the external reference voltage and a voltage generated in response to the first reference voltage into a second A/D converter, the second A/D converter in the controller; and

    using the first measurement result and the second measurement result to calculate a first correction factor suitable for use in correcting a set of measurements from at least one of the first and second monitoring units.

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