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To prevent cell destruction due to gas ignition within a battery cell, each vented cell must be equipped with a : Flame arrester.
Each vented cell must have a flame arrester that, under normal operating conditions, is intended to stop the cell from being destroyed if the gases inside the cell are ignited by an external spark or flame.
A flame arrestor, also known as a flame trap, is a device that prevents fluid combustion by putting out the flame. Flame arrestors prevent the spread of a flame through an opening. The apparatus is made up of a collection of perforated plates, slots, screens, etc., enclosed in a case or frame that can absorb the heat of an incoming flame and put it out before it can spread. A portion of the heat produced by combustion is absorbed by the pipe wall when burning takes place inside of it.
The amount of total heat absorbed by the pipe wall and the flame speed both decrease as the pipe diameter gets smaller. Regardless of flame speed, it is possible to completely stop the passage of flame by using a very small diameter. A typical flame arrestor is a collection of tiny tubes that provides the necessary venting capacity while inhibiting flame.
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