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MAINTENANCE-FREE TYPE LEAD ACID

  • US 3,862,861 A
  • Filed: 05/30/1972
  • Issued: 01/28/1975
  • Est. Priority Date: 08/03/1970
  • Status: Expired due to Term
First Claim
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1. A MAINTENANCE-FREE TYPE LEAD ACID CELL WHICH SUSTAINS SUBSTANTIAL OVERCHARGE IN ANY INDISCRIMATE ATTITUDE OF THE CELL, SAID CELL OPERATING IN A NORMALLY SEALED CONFIGURATION UTILIZING AN "OXYGEN" CYCLE, COMPRISING:

  • NON-SELF-SUPPORTING LEAD BASED GRIDS HAVING A HIGH HYDDROGEN OVERVOLTAGE, SAID GRIDS PASTED WITH ACTIVE MATERIAL TO FORM POROUS POSITIVE AND NEGATIVE PLATES;

    AN ELECTROLYTE ABSORBING AND RETAINING SEPARATOR MATERIAL CHARACTERIZED BY HAVING A HIGH HEAT OF WETTING AND INTIMATELY CONTACTING ADJACENT, OPPOSITE POLARITY PLATES AN ELECRROLYTE ABSORBED AND RETAINED BY SAID SEPARATOR AND BY SAID PLATES TO THE DEGREE THT NO FREE UNABSORBED ELECTROLYTE IID PRESENT IN THE CELL, SAID PLATES AND THIN LAYER OF ELECTROLYTE ON SAID ACTIVE MATERIAL SUFFICIENT TO SUSTAIN ELECTROCHEMICAL REACTIONS AT THE PLATES AND PERMITTING OXYGEN TRANSFER TO AND FROM THE ACTIVE MATERIAL THROUGH A VOID VOLUME FORMED IN SUBSTANTIALLY ALL OF THE PORES OF SAID PLATES, SAID TIN LAYER OF ELECTROLYTE UNIFORMLY DISTRIBUTED THROUGHOUT SAID PLATES AND SAID VOID VOLUME FORMED BY VIRTUE OF THE PRESENCE OF ONLY THE THIN LAYER OF A ELECTROLYTE ON THE ACTIVE MATERIAL, AND A CONTAINER TIGHTLY CONTRASTING SAID PLATES, SEPARATOR AND ABSORBED ELECTROLYTE UNDER FIRM STACKING PRESSURE TO FORM S SELF-SUPPORTING INTEGRAL CELL.

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