Pasted type lead-acid battery
AssigneeJapan Storage Battery Co., Ltd.
InventorsKunio Yonezu, Masaharu Tsubota, Katsuhiro Takahashi
Life of this patent
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Abstract
A pasted type lead-acid battery with greatly extended service life and capacity over the usable service life thereof has a glass mat, which may have a dual layer construction, disposed adjacent positive plates of assembled elements. Each plate is constructed as a grid having main and small members with the small members entirely embedded in an active material. Pressure is applied to the assembled element within disclosed ranges. The assembled elements may be pressurized by a binding band or pressure may be applied from outside the battery container. In the latter case, the side and bottom walls of the container are made pleat-shaped.
Claims12
A pasted type lead-acid battery comprising:
- a plurality of positive and negative plates which comprises grids of lead-based material pasted with an active material;
- separators for separating said plates;
- a plurality of glass mats in contact with surfaces of said positive plates;
- said glass mats having a dual layer structure comprising a first layer of glass fibers in contact with said surfaces of said positive plates and having a diameter of no more than 1 .mu.m and a second layer of glass fibers having a diameter of at least 10 .mu.m;
- a battery container in which are disposed assembled elements comprising said plates, said separators and said glass mats, pressure being applied to said assembled elements within said container, said pressure being within a range of 20 to 80 kg/dm.sup.2 without electrolyte in said container.
A pasted type lead-acid battery comprising:
- a plurality of positive and negative plates which comprises grids of lead-based material pasted with an active material;
- separators for separating said plates;
- a plurality of glass mats in contact with surfaces of said positive plates;
- said glass mats having a dual layer structure comprising a first layer of glass fibers in contact with said surfaces of said positive plates and having a diameter of no more than 1 .mu.m and a second layer of glass fibers having a diameter of at least 10 .mu.m, said plates, said separators, and said glass mats comprising assembled elements;
- said glass mats having such characteristic as to provide a maximum reduction ratio of degree of pressure of the assembled elements when immersed in an electrolyte 30% or less than the degree of pressure of the assembled elements in its dry state;
- a battery container in which are disposed assembled elements comprising said plates, said separators and said glass mats;
- pressure being applied to said assembled elements within said container;
- said pressure being in a range of 20 to 40 kg/dm.sup.2 without electrolyte in said container.
Dependencies are inferred from the claim text.