Abstract: An enclosed type lead battery comprises in combination:a cap formed of a synthetic resin, which is integrally formed with anodec and cathodec terminals formed of lead or a lead alloy inserted therein and an exhaust portion to which a safety valve is attached,a plate stack having its ears connected to said terminals, andan enclosure formed of a film or sheet made of a synthetic resin, in which said plate stack is placed, and which is thermally fused at the peripheral edge of its opening to said cap.

Abstract: This invention relates to an improvement on a sealed lead storage battery which comprises a case, positive and negative plates alternately disposed in a case, porous separators between the adjacent plates and electrolyte filled in the case so as to be retained at least in the porous separators.The sealed lead storage battery of the invention further comprises additional electrolyte porous retainer means disposed in an unoccupied space in the case so as to have increased amount of electrolyte. The additional electrolyte retainer means may be disposed in at least one of an upper space over the plate group, a lower space below the plate group and side spaces beside the plate group. The additional electrolyte retainer means may be of glass fine fiber mat, glass and synthetic fine fiber mat or gel. It may be integrally formed with the porous separators. Preferably, the positive and negative plates may be so porous that the electrolyte is retained in them.

Abstract: A plate grid in use for a plate for a lead storage battery comprising a plurality of spaced longitudinal wire members each including a wire element of acid resisting material and a wire element of electrically conductive material selected from a group consisting of lead and lead alloy wound around said acid resisting wire element. A collector of electrically conductive material similar to that of said electrically conductive wire element is provided which is attached to one of the ends of said longitudinal wire members so that said collector is electrically connected to said electrically conductive wire elements of said longitudinal wire members.