| 摘要 |
PROBLEM TO BE SOLVED: To prevent charging of static electricity on a battery lid of a lead storage battery, and prevent the damage of the battery due to discharge sparks of the static electricity. SOLUTION: A metal oxide layer made of SnO2, Sb2O5, and polyolefin is formed at a position in the vicinity of a venthole of a liquid plug mounted on a battery lid of synthetic resin. The metal oxide layer is formed by coating aqueous solution containing SnO2, Sb2O5, and polyolefin on the battery lid and drying it. Further, the metal oxide layer to be made in contact with an anode terminal has free electron, and static electricity charged at the battery lid 3 is quickly absorbed from the metal oxide layer 5 by the battery 1 through the anode terminal, by lowering surface resistance of a surface of the lid. As a result, generation of discharge sparks due to the static electricity around a venthole 7 is restrained, so that ignition to hydrogen gas stored in the battery and battery damage caused by the same can be restrained. COPYRIGHT: (C)2009,JPO&INPIT
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