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Current interrupt device for batteries

  • US 7,763,375 B2
  • Filed: 05/24/2006
  • Issued: 07/27/2010
  • Est. Priority Date: 05/24/2006
  • Status: Expired due to Fees
First Claim
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1. A battery comprising:

  • a container with an opening;

    at least one electrochemical cell having a positive electrode, a negative electrode, a separator and an electrolyte, said electrochemical cell disposed within the container;

    a terminal cover fitted within the opening;

    an insulating washer proximate to the terminal cover;

    a sealing plate forming an electrical circuit between the terminal cover and either the positive or negative electrode, said sealing plate having a pressure relief vent, a lower portion which defines an internal surface of the electrochemical cell and an upper portion extending through an aperture in the insulating washer to contact the terminal cover;

    a gasket compressed between the container and the sealing plate;

    wherein the sealing plate cooperates with the gasket and the insulating washer to change shape at a predetermined temperature value so as to break the electrical circuit; and

    wherein the sealing plate maintains contact with either the positive or negative electrode irrespective of the shape of the sealing plate.

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