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Battery cell assembly with a thin profile sensor

  • US 9,389,279 B2
  • Filed: 10/02/2013
  • Issued: 07/12/2016
  • Est. Priority Date: 10/02/2013
  • Status: Active Grant
First Claim
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1. A battery cell assembly, comprising:

  • a pouch-type battery cell having a housing and first and second electrical terminals extending outwardly from the housing;

    a thin profile sensor having a flexible plastic sheet, a microprocessor, a sensing circuit, a heat generating circuit, and a data transmitting circuit;

    the microprocessor being operably coupled to the sensing circuit, the heat generating circuit, and the data transmitting circuit;

    the microprocessor, the sensing circuit, the heat generating circuit, and the data transmitting circuit being disposed on and coupled to a first side of the flexible plastic sheet, the flexible plastic sheet further having an adhesive portion disposed on the first side on a peripheral region of the flexible plastic sheet, and adhesive portion adhering at least a portion of the first side of the flexible plastic sheet to an exterior surface of the housing of the pouch-type battery cell such that the microprocessor, the sensing circuit, and the heat generating circuit are disposed between the flexible plastic sheet and the exterior surface of the housing of the pouch-type battery cell;

    the microprocessor being electrically coupled to the first and second electrical terminals of the pouch-type battery cell, the first and second electrical terminals supplying an operational voltage to the microprocessor;

    the microprocessor being programmed to determine a first voltage value corresponding to an open circuit voltage of the pouch-type battery cell between the first and second electrical terminals;

    the microprocessor being further programmed to determine a second voltage value corresponding to a first voltage of the pouch-type battery cell between the first and second electrical terminals when the pouch-type battery cell is supplying electrical current through the heat generating circuit;

    the microprocessor being further programmed to determine a current value corresponding to an electrical current level flowing through the pouch-type battery cell when the pouch-type battery cell is supplying the electrical current through the heat generating circuit;

    the microprocessor being further programmed to determine an internal resistance value corresponding to an internal resistance level of the pouch-type battery cell based on the first voltage value, the second voltage value, and the current value;

    the microprocessor being further programmed to store the internal resistance value in a memory device; and

    the microprocessor being further programmed to generate a control signal to induce the data transmitting circuit to transmit a signal having a first binary message with a battery cell identifier value and the internal resistance value of the battery cell therein.

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