To provide a lead-acid battery having excellent reliability which suppresses reduction in an electrolytic solution and also suppresses corrosion of joint parts between a positive electrode plate lug part and a negative electrode strap even if an electrolytic solution level is lowered and the negative electrode strap is exposed.
Electrolytic solution mist is refluxed into a cell chamber 10 using a lid 11 having an exhaust reflux structure A, antimony is not contained in the negative electrode strap 7, and alloy treatment is carried out in a lattice lug part, and the same alloy as that of the negative electrode strap is used, thereby preventing generation of oxyhydrogen gas and corrosion of a strap part.
COPYRIGHT: (C)2009,JPO&INPIT
Kei Ishimaki
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Kentaro Fujii
Ikuro Terauchi