| abstract |
[Configuration] The negative electrode material of a lead storage battery contains graphite and barium sulfate. Further, the ratio S / W between the average electrode plate spacing S between the negative electrode plate and the positive electrode plate and the mass W of the negative electrode material per negative electrode plate is 0.01 mm / g or more. [Effect] Penetration short circuit due to graphite hardly occurs and PSOC life performance is excellent. [Selection] Figure 3 |