Vent cap with electrolyte drain and explosion attenuation...

Details Vent cap with electrolyte drain and explosion attenuation... Vent cap with electrolyte drain and explosion attenuation...

H - Electricity

01

M

H01M 2/12 (2006.01)

Patent

CA 2120121

ABSTRACT OF THE DISCLOSURE 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) (50) include a step (150) to assist in closure of the fill openings, and baffles (80, 82, 84, 104 106, 108) within the vent prevent accumulation of electrolyte within the cap. The arrangement of the entrance (140) to the gas escape passage (leading through an explosion attenuation device (120) 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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