| 摘要 |
PROBLEM TO BE SOLVED: To provide a control valve type lead-acid battery of which the lifetime is prolonged by preventing charging/discharging capacity from being reduced by storing non-reducible lead sulphate, the control valve type lead-acid battery being operated in a state less than full charge.SOLUTION: In the control valve type lead-acid battery in a transformed state, a mass ratio N/P of a total amount P of active material being held on a positive electrode plate and a total amount N of active material being held on a negative electrode plate is settled within a range of 1.0<N/P≤1.2, and porosity of an active material being held on the positive electrode plate ranges 45 to 50%. Preferably, porosity of a transformed active material being held on the negative electrode plate ranges 50 to 60%. Further preferably, porosity of an active material being held on the negative electrode plate ranges 50 to 60%, negative electrode plates are disposed on both end faces of an electrode plate group, and the number of negative electrode plates is more than the number of positive electrode plates. |
