SEALED TYPE LEAD ACID BATTERY

PURPOSE:To make a sealed type lead acid storage battery with less penetration of water vapor and less self-discharging by turning fluoric that inside of a cap-shaped valve element which is in contact with a cylindrical opening provided in a battery jar, wherein the cap-shaped valve element is to be...

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Bibliographic Details
Main Authors KIBE TETSUICHIROU, TSUCHIYA SATOMI
Format Patent
LanguageEnglish
Published 07.01.1992
Edition5
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Summary:PURPOSE:To make a sealed type lead acid storage battery with less penetration of water vapor and less self-discharging by turning fluoric that inside of a cap-shaped valve element which is in contact with a cylindrical opening provided in a battery jar, wherein the cap-shaped valve element is to be combined with the cylindrical opening, and coating the part with fluoric resin. CONSTITUTION:A cylindrical opening 4 in the battery jar of a sealed type lead acid storage battery is coated with silicone oil 3, and the inside of a cap- shaped valve element 1 made of chloroprene rubber is turned fluoric by hydrogen fluoride, over which polytetrafluoroethylene 2 as fluoric resin is sprayed followed by baking process, and thus a check valve is accomplished, which is fitted in place. The coating thickness of this fluoric resin shall preferably be 10-20mum in average. A battery of this construction presents less decrease in the weight after long time storage and less self-discharging accordingly.
Bibliography:Application Number: JP19900102000