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Methods and apparatus for optimal fast battery charging

  • US 10,566,819 B2
  • Filed: 08/07/2018
  • Issued: 02/18/2020
  • Est. Priority Date: 09/09/2015
  • Status: Active Grant
First Claim
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1. A system for charging a rechargeable lithium ion battery including an anode electrode, comprising:

  • a battery charger responsive to charging control signals to apply a current to the anode electrode of the rechargeable lithium-ion battery; and

    a controller coupled to the battery charger and configured to generate the charging control signals based on at least one of a battery voltage, a battery temperature, and current flowing into the battery;

    the battery charger wherein the system is configured to apply a charging current from the battery charger to the battery during a battery charging cycle, the charging current based on a charging voltage in which a potential of the anode electrode is less than a lithium metal potential of the lithium-ion battery, including;

    calculating an open cell anode potential and calculating an anode resistance of the battery, andgenerating the charging current proportional to the calculated open cell anode potential divided by the calculated anode resistance.

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