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Power storage module state estimation apparatus, battery pack, and method for estimating the state of a power storage module

  • US 9,658,289 B2
  • Filed: 02/23/2015
  • Issued: 05/23/2017
  • Est. Priority Date: 03/04/2014
  • Status: Active Grant
First Claim
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1. A power storage module state estimation apparatus comprising:

  • a parameter calculator configured to calculate a parameter based on a current value of a power storage module, wherein the parameter is selected from the group consisting of a direction of a current having a high frequency of current and flowing in the power storage module, an average current value of the power storage module, and a charge and discharge capacity after the direction of the current having the high frequency of current and flowing in the power storage module is switched;

    a hysteresis compensator configured to use the parameter to compensate an open circuit voltage of the power storage module;

    an open circuit voltage calculator configured to calculate the open circuit voltage of the power storage module; and

    an open circuit voltage validity determination module configured to determine whether the open circuit voltage calculated by the open circuit voltage calculator is valid.

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