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Diagnostic use of physical and electrical battery parameters and storing relative condition data

  • US 8,860,420 B2
  • Filed: 09/16/2011
  • Issued: 10/14/2014
  • Est. Priority Date: 09/16/2011
  • Status: Active Grant
First Claim
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1. An electronic device comprising:

  • an interface for receiving a battery comprising a battery module for supplying power to the electronic device; and

    a power management module coupled to the battery and configured to;

    measure an electromagnetic radiation spectrum of the battery due to current flow in the battery module;

    compare the measured electromagnetic radiation spectrum of the battery to at least one of a plurality of reference electromagnetic radiation spectrums, each of the reference electromagnetic radiation spectrums corresponding with a different relative condition;

    determine a relative condition of the battery by comparing the measured electromagnetic radiation spectrum with one of the plurality of reference electromagnetic radiation spectrums;

    store, in a memory store, data identifying the relative condition of the battery;

    repeat measuring the electromagnetic radiation spectrum, comparing the electromagnetic radiation spectrum, and determining the relative condition of the battery at a second time such that a second relative condition of the battery is determined;

    compare the second relative condition of the battery with the relative condition of the battery previously stored in the memory store;

    determine a rate of change between the second relative condition of the battery and the relative condition of the battery previously stored in the memory store; and

    determine if the rate of change exceeds a threshold tolerance level.

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