Patent ID: 9362596
Filing Date: 2016-06-07
CPC Classification: H01M,Y02E,Y02P

Claim Text:
1. A liquid lead-acid battery comprising: an electrode group comprising a lamination of a positive electrode plate in which a positive active material is carried by a positive current collector and a negative electrode plate in which a negative active material is carried by a negative current collector; an electrolyte solution which has flowability and in which the electrode group is immersed; and a container storing the electrode group and the electrolyte solution, wherein when a volume Ve of the electrode group is calculated by where Sp represents an electrode plate area of the positive electrode plate, Sn represents an electrode plate area of the negative electrode plate, and D represents internal dimension of the container in a direction in which the electrode plates of the electrode group are laminated, a ratio (Vp+Vn)/Ve is 0.27 to 0.32, where Vp+Vn is a sum volume of a total pore volume Vp of the positive active material and a total pore volume Vn of the negative active material contained in the electrode group, and Ve is a volume of the electrode group, and a ratio Vp/Ve is 0.13 to 0.15, where Vp is the total pore volume of the positive active material and Ve is the volume of the electrode group wherein the positive active material contains antimony by 0.04 mass % to 0.25 mass %.