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In-situ battery health detector and end-of-life indicator

  • US 8,598,849 B2
  • Filed: 03/05/2013
  • Issued: 12/03/2013
  • Est. Priority Date: 10/19/2009
  • Status: Active Grant
First Claim
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1. A system for monitoring a battery in a portable electronic device, comprising:

  • a load-generating apparatus configured to apply a pulse load to the battery;

    a monitoring apparatus configured to determine an impedance of the battery by measuring a voltage of the battery during the pulse load; and

    a management apparatus configured to;

    assess a health of the battery based on the impedance by analyzing a linearity of the impedance of the battery for at least two separate charge-discharge cycles performed on the battery; and

    use the assessed health to manage use of the battery in the portable electronic device.

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