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Water activatable, lead-acid storage battery and method for manufacturing same

  • US 4,098,961 A
  • Filed: 02/11/1977
  • Issued: 07/04/1978
  • Est. Priority Date: 06/18/1975
  • Status: Expired due to Term
First Claim
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1. A method of manufacturing a lead-acid storage battery including a container having a plurality of cell compartments and a plurality of battery elements consisting of a plurality of positive and negative plates with separators positioned therebetween, the battery elements being electrically connected, to provide a battery capable of being stored and thereafter activated, by the addition of water and charging, which comprises forming said plates by bringing said plates into contact with a formation electrolyte and applying current thereto, draining the formation electrolyte from the battery, bringing said plates into contact with a development electrolyte to increase the specific gravity of the residual electrolyte retained in the battery elements, deep discharging the battery plates, reducing the amount of electrolyte in the battery to an amount in the range of from about 10% by volume of the total electrolyte capable of being added to the battery to the amount of electrolyte retained by the saturated battery elements, the amount of sulfate resulting from the deep discharge and the residual sulfuric acid electrolyte retained within the battery elements combining, upon the addition of water and charging, to yield an end-of-charge electrolyte having an acceptable specific gravity, and sealing the battery.

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