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Analysis of rechargeable batteries

  • US 9,658,146 B2
  • Filed: 02/24/2014
  • Issued: 05/23/2017
  • Est. Priority Date: 02/25/2013
  • Status: Active Grant
First Claim
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1. A method of analyzing a rechargeable battery design, the method comprising:

  • a vacuum test including;

    placing a first rechargeable battery in a test vessel;

    evacuating the test vessel;

    externally heating the first battery to induce thermal runaway;

    monitoring a temperature and a pressure inside the test vessel to detect a rupture of the first battery; and

    when the rupture of the first battery is determined, analyzing material expelled from the first battery following the rupture to obtain test data under vacuum conditions;

    a noble gas test including;

    placing a second rechargeable battery in the test vessel;

    purging the test vessel with a noble gas;

    externally heating the second battery to induce thermal runaway;

    monitoring a temperature and a pressure inside the test vessel to detect a rupture of the second battery; and

    when a rupture of the second battery is determined, analyzing material expelled from the second battery following the rupture to obtain test data under noble gas conditions; and

    an oxygen test including;

    placing a third rechargeable battery in a test vessel;

    filling the test vessel with air;

    externally heating the third battery to induce thermal runaway;

    monitoring a temperature and a pressure inside the test vessel to detect a rupture of the first battery; and

    when a rupture of the first battery is determined, analyzing material expelled from the third battery following the rupture to obtain test data under oxygen conditions.

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