Abstract: A vent system for an electric storage battery having a flame arresting capability to minimize the possibility of battery explosion from ignition of explosive gases flowing from the vent plug. The vent system includes a vent plug design having an internal restricted passage and a flange extending around the top of the vent plug which cooperates with the upper surface of the battery cover to create an explosion chamber, so that in the event the explosive gases being vented are ignited, the resulting controlled explosion extinguishes the flame. One embodiment is provided wherein the top surface of the plug is flush with the top of the battery cover. A modified vent well is required for this embodiment, whereby the vent well in the battery cover has a recessed shoulder to receive the flange portion of the vent plug. A second embodiment is also provided wherein the vent plug can be used on conventional battery cover designs, but is not flush with the top of the battery cover.

Abstract: A vent system for an electric storage battery having a flame arresting capability to minimize the possibility of battery explosion from ignition of explosive gases flowing from the vent plug. The vent system includes a vent plug design having an internal restricted passage and a flange extending around the top of the vent plug which cooperates with the upper surface of the battery cover to create an explosion chamber, so that in the event the explosive gases being vented are ignited, the resulting controlled explosion extinguishes the flame. One embodiment is provided wherein the top surface of the plug is flush with the top of the battery cover. A modified vent well is required for this embodiment, whereby the vent well in the battery cover has a recessed shoulder to receive the flange portion of the vent plug. A second embodiment is also provided wherein the vent plug can be used on conventional battery cover designs, but is not flush with the top of the battery cover.

Abstract: A vent system for an electric storage battery designed to remove the electrolyte which is entrained in the gases that are vented from the particular battery cell to the atmosphere through the vent plug assembly. The liquid gas separation feature has a primary inlet on the sidewall of the vent plug at its uppermost position that still remains in the battery cell, a drain opening in the lowermost portion of the vent plug, and baffles arranged inside the vent plug assembly such that the fluid entering the primary inlet flows in a horizontal direction and is scrubbed to remove the electrolyte. The electrolyte is then collected and returns to the cell through the drain opening while the scrubbed gases eventually reach the atmosphere. The liquid gas separation system can be used in a vent plug having a low profile for use on maintenance free batteries as well as on non-maintenance free batteries.