To provide a lead-acid battery suppressing internal short circuit caused by curving of an electrode plate generating in the lead-acid battery housing expand electrode plates in a bag-shaped polyethylene separator, enhancing productivity, and lengthening life.
The lead-acid battery uses positive plates 601 and negative plates 602 in which a positive plate surface and a negative plate surface are curved so as to project in the opposite direction to the pressing in direction of a cutting blade in cutting work of the expand electrode plates, and the curved directions of the positive plates and the negative plates constituting an electrode plate group are made the same. Preferably, the positive plate is manufactured in such a way that an active material is filled in an over-paste state, and the cutting blade is pressed into one surface from the over-paste surface of the electrode plate and cut so that the electrode plate is made thicker than an expand grid.
| JPH11273709A | 1999-10-08 | |||
| JPH0322351A | 1991-01-30 | |||
| JP2003132897A | 2003-05-09 | |||
| JPH0478762U | 1992-07-09 | |||
| JP2000348732A | 2000-12-15 |
Tomoyasu Sakaguchi
Hiroki Naito