Flame arrestor for a lead-acid battery
AssigneeEH Europe GmbH
InventorsKen Partington, Liam Warburton
Life of this patent
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Abstract
A lead-acid battery comprises a flame arrestor plug (1) for controlled venting of gases from the battery through the vent hole (3), wherein the flame arrestor plug has a valve element (5) for controlling the venting of gas from the vent hole and a plug portion (4) which is adjacent to or in contact with the battery casing (2) around the vent hole and which, together with the battery casing, defines a flow path through which gases released through the valve element can escape from the battery, at least a portion of the flow path being of sufficiently narrow cross-section to prevent propagation of a flame along the flow path.
Claims16
A flame arrestor plug for a lead-acid battery which includes a valve element for controlling the venting of gas from a vent hole in a casing of the lead-acid battery, and a plug portion which is provided in an outer surface thereof with one or more grooves, which, in use, together with the battery casing define one or more channels between the plug and the battery casing through which gases released through the valve element can escape from the battery, wherein at least a portion of the or each channel has a cross-section that is sized and configured to prevent propagation of a flame along the channel, and wherein the plug portion comprises an annular portion and the one or more grooves extend longitudinally along an entire length of the annular portion.
A lead-acid battery comprising a casing having at least one vent hole, and at least one flame arrestor plug for controlled venting of gases from the battery through the at least one vent hole,
- wherein the or each flame arrestor plug is associated with a vent hole and has a valve element for controlling the venting of gas from that vent hole and a plug portion which is adjacent to or in contact with the battery casing around the vent hole and which, together with the battery casing, defines a flow path between the plug and the battery casing through which gases released through the valve element can escape from the battery, at least a portion of the flow path having a cross-section that is sized and configured to prevent propagation of a flame along the flow path,
- wherein the flow path consists of 20 or more channels defined by the battery casing together with 20 or more corresponding grooves provided on an outer surface of the plug portion of the flame arrestor plug.
Dependencies are inferred from the claim text.