H - Electricity
01
M
319/122
H01M 2/12 (2006.01) H01M 10/16 (2006.01)
Patent
CA 1160680
ABSTRACT OF THE DISCLOSURE An explosion-proof battery vent and filler plug (10) is disclosed, which provides a flame barrier (16) to prevent external ignition of gas evolved from a battery during operation from causing ignition of the larger volume of gas within the battery itself, without simultaneously allowing a high rate of evaporation of the electrolyte. In accordance with the invention, the flame barrier means (16) is provided with an indirect, restricted outlet (64) for the evolved gases to pass to the atmosphere, thus reducing the flow of air through the electrolyte space of the battery. The preferred embodiment includes a filler tube (14) with a funnel-shaped entrance (24) within a shell member (12) which sealingly engages an opening of a battery Gas evolved from the battery during operation passes into a splash chamber, (46) then through a baffle (18) into an expansion chamber 52, and then flows through a microporous disk flame barrier (16) into an exit chamber, (65), and vents to the atmosphere through vent holes (64) which are substantially smaller than any previous passage through which the gas has passed, thus forming an indirect, a restricted outlet for battery gases, and a restricted inlet for air flow to limit the rate of evaporation of electrolyte.
398260
Allied Corporation
Macrae & Co.
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