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Apparatus for estimating battery degradation state, system including the same, and method thereof

  • US 10,330,738 B2
  • Filed: 07/18/2017
  • Issued: 06/25/2019
  • Est. Priority Date: 04/18/2017
  • Status: Active Grant
First Claim
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1. A system for estimating a battery degradation state, the system comprising:

  • a processor configured to estimate a battery degradation state by using a correction coefficient calculated from a difference between a first open circuit voltage (OCV), calculated from battery state information, and a second open circuit voltage (OCV_i), acquired based on a change amount of a battery state of charge (SoC) determined by current integration; and

    a memory device configured to store the first open circuit voltage, the second open circuit voltage, and the correction coefficient,wherein the processor is further configured to measure a terminal voltage of a battery equivalent model and subtract a voltage across an internal resistor and a phantom voltage component from the measured terminal voltage to calculate the first open circuit voltage.

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