Abstract: A separator for separation of opposite-polarity electrode plates in a lead-acid rechargeable battery includes two separator leaves connected together at rim areas which rest on one another to form a pocket which is open on one side for insertion of an electrode plate. A basic material thickness of the separator leaves at the rim areas increases from an outer edge of a rim area in the direction of the contact area of the separator leaf for an electrode plate, and the basic material thickness in the rim area adjacent to the contact area is greater than the basic material thickness in the contact area.

Abstract: An electrochemical lead-acid rechargeable battery includes a plurality of alternately arranged anode and cathode plates having separators therebetween, the separators each having a microporous separator layer composed of polyethylene and a fibre layer on each surface of the separator layer. The battery also includes an electrolyte surrounding the anode and cathode plates as well as the separators. The microporous separator layer and the fibre layer each have a thickness of at least 100 ?m. The average fibre length of the fibre layer is more than 1 mm and the average fibre diameter of the fibre layer is more than 1 ?m, and the fibre layers are firmly connected to edge areas of the associated separator layer.