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Extended shelf-life battery

  • US 5,219,676 A
  • Filed: 03/27/1991
  • Issued: 06/15/1993
  • Est. Priority Date: 03/27/1991
  • Status: Expired due to Fees
First Claim
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1. A lead-acid battery having extended shelf-life comprising:

  • a battery housing containing positive and negative lead-acid electrode elements and separators;

    sulfuric acid electrolyte contained within the housing in a quantity sufficient to maintain the electrode elements in a damp, but not flooded, condition;

    a desiccant within the housing located out of contact with the elements and in a position to absorb water vapor present in the housing the desiccant being located in a container at least a portion of water is permeable to water vapor;

    the electrode positive and negative materials being formed so that a charge exists on the battery and so that self-discharge reactions will occur within the housing producing water vapor;

    the electrolyte having a specific gravity ranging from about 1.015 to about 1.320 and the quantity of the desiccant being sufficient to absorb the water vapor created during the self-discharge reactions to maintain the specific gravity of the electrolyte within said range.

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