Patent ID: 7597998
Filing Date: 2009-10-06
Classification: H01M,Y02E,Y02P

Abstract:
1. A lead acid battery including: an electrode plate pack comprising a plurality of negative electrode plates each of which comprises a negative electrode grid having a tab and a negative electrode active material layer retained by said negative electrode grid, a plurality of positive electrode plates each of which comprises a positive electrode grid having a tab and a positive electrode active material layer retained by said positive electrode grid, and a plurality of separators separating said positive electrode plate and said negative electrode plate; a positive electrode connecting member comprising a positive electrode strap to which said tab of each positive electrode plate of the electrode plate pack is connected, and a positive electrode pole or a positive electrode connecting body provided at said positive electrode strap; and a negative electrode connecting member comprising a negative electrode strap to which said tab of each negative electrode plate of the electrode plate pack is connected, and a negative electrode pole or a negative electrode connecting body provided at said negative electrode strap, wherein: said positive electrode grid, said negative electrode grid, said positive electrode connecting member, and said negative electrode connecting member comprise a Pb-alloy including at least one of Ca and Sn, said Pb-alloy substantially not including Sb, said negative electrode active material layer includes 0.0001 to 0.003 parts by weight of Sb per 100 parts by weight of a negative electrode active material, and said positive electrode grid has a lead alloy layer including 0.01 to 0.2 parts by weight of Sb per 100 parts by weight of a positive electrode active material on at least a part of a surface thereof where said positive electrode active material layer is in contact, said lead alloy layer having a thickness of 1 to 20 μm.