Patent ID: 9356321
Filing Date: 2016-05-31
CPC Classification: H01M,Y02E,Y02P

Claim Text:
1. A lead-acid battery in which at least one electrode plate group formed such that a plurality of positive electrode plates and a plurality of negative electrode plates are stacked on each other with a separator being interposed between adjacent ones of the positive and negative electrode plates is housed in at least one cell chamber together with an electrolyte, wherein each positive electrode plate includes: each negative electrode plate includes: an area PS of the positive electrode surface layer on the surface of the positive electrode grid is larger than an area NS of the negative electrode surface layer on the surface of the negative electrode grid, NS/PS falls within a range of 0.3-0.8, and the positive and negative electrode surface layers are made of a Pb—Sb based alloy containing antimony at a content of 1.0 to 5.0 mass %.