초록 ▼

The invention involves a sealed lead-acid battery comprising a cell element having positive plates, negative plates and separators, and electrolyte retained within micropore of the cell element. The micropores of both the plates is substantially filled with the electrolyte, while the micropores of t

The invention involves a sealed lead-acid battery comprising a cell element having positive plates, negative plates and separators, and electrolyte retained within micropore of the cell element. The micropores of both the plates is substantially filled with the electrolyte, while the micropores of the separators are not completely filled with the electrolyte. The voids formed partially in the micropores of the separators permit transport of the oxygen gas from the positive plates to the negative plates. Such a sealed lead-acid battery has long service life, and excels in ability to O2 absorb gases and reproduce water during overcharging and to recover by charging after a long overdischarged-state storage.

대표청구항 ▼

A sealed lead-acid battery which will retain a high-rate discharge characteristic even though subjected to repeated cycles of charging and discharging and even though the amount of electrolyte therein decreases below an optimum operational amount due to overcharging, said sealed lead-acid battery co

A sealed lead-acid battery which will retain a high-rate discharge characteristic even though subjected to repeated cycles of charging and discharging and even though the amount of electrolyte therein decreases below an optimum operational amount due to overcharging, said sealed lead-acid battery comprising a cell element and an electrolyte, said cell element including positive plates each having a thickness of between 3 and 4 mm and containing a positive active material and micropores, said positive active material having a specific surface area per unit volume and a total surface area, negative plates containing a negative plate material and micropores, said negative active material having a specific surface area per unit volume and a total surface area, and separators between said positive plates and said negative plates, said separators being made of a material containing preponderantly glass fibers and micropores, said material having a specific surface area per unit volume and a total surface area, the specific surface area per unit volume of the material of said separators being smaller than the specific surface area per unit volume of either said positive active material or said negative active material and the total surface area of the material of said separators being smaller than the total surface area of either said positive active material or said negative active material, and said separators having a lower electrolyte absorptivity and retention power than said positive or negative plates, said electrolyte being distributed within said cell such that the sum of the amount of electrolyte contained in said positive plates and in said negative plates is greater than the amount of electrolyte contained in said separators and such that the micropores of said positive and negative plates will remain substantially filled with electrolyte whereas the micropores of said separator will be only partially filled as the amount of electrolyte in said cell element decreases below its optimum amount.