Vent cap with electrolyte drain and explosion attenuation capabilities
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United States of America Patent
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Feb 8, 1994
Grant Date -
N/A
app pub date -
May 27, 1993
filing date -
May 27, 1993
priority date (Note) -
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status (Latency Note)
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Abstract
The explosion attenuating vent cap for storage batteries according to the present invention features an electrolyte drain and baffle design adapted for maximizing return to the battery of any liquid which may enter the vent from vibration, tilting, overheating, overcharge and the like. The vent barrel(s) include a step to assist in closure of the fill openings, and baffles within the vent prevent accumulation of electrolyte within the cap. The arrangement of the entrance to the gas escape passage (leading through an explosion attenuation device such as a disc of microporous polymer) is located on the center lines of the barrel and at the highest possible location within the vent to minimize the intrusion of electrolyte into the attenuation material. This location of the entrance prevents accumulation of electrolyte at that location. Preferably, the vent cap is of the ganged variety, i.e. useful for simultaneously capping three or more fill openings of the battery.
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