hydrogen off gasing from sealed lead acid batteries
hydrogen off gasing from sealed lead acid batteries
(OP)
Hi All,
We have a battery pack made up 6 sealed lead acid batteries to make a 12 volt battery, our customer has requested the ability to charge this battery in a sealed hull. We currently recommend charging outside of the hull for this reason.
My questions are the following:
1. Does anyone know of a purging system that could be used to purge the hull incase of off gassing may occur?
2. Does anyone know about a catalytic scavenger in the battery compartment to adsorb the hydrogen?
Thanks for any information you can provide.
Tofflemire
We have a battery pack made up 6 sealed lead acid batteries to make a 12 volt battery, our customer has requested the ability to charge this battery in a sealed hull. We currently recommend charging outside of the hull for this reason.
My questions are the following:
1. Does anyone know of a purging system that could be used to purge the hull incase of off gassing may occur?
2. Does anyone know about a catalytic scavenger in the battery compartment to adsorb the hydrogen?
Thanks for any information you can provide.
Tofflemire





RE: hydrogen off gasing from sealed lead acid batteries
You should adequately vent using a flameproof fan, with anti-spark features etc.
Try ABB-Woods ltd fans
Friar Tuck of Sherwood
RE: hydrogen off gasing from sealed lead acid batteries
Though you might want to give some thought to fire suppression in this enclosed space.
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Corrosion never sleeps, but it can be managed.
http://www.trenttube.com/Trent/tech_form.htm
RE: hydrogen off gasing from sealed lead acid batteries
There probably is a substance that could absorb the hydrogen or react with it more slowly than oxygen does, but I don't know what it might be.
Besides dilution, one other way to prevent a fuel gas from combusting is to remove the oxidizer. Prefill the compartment with hydrogen.
Mike Halloran
NOT speaking for
DeAngelo Marine Exhaust Inc.
Ft. Lauderdale, FL, USA
RE: hydrogen off gasing from sealed lead acid batteries
How about a nitrogen purge? The gas is cheap, a small pressure bottle, regulator and pressure switch would work. But the space would need to really be sealed.
= = = = = = = = = = = = = = = = = = = =
Corrosion never sleeps, but it can be managed.
http://www.trenttube.com/Trent/tech_form.htm
RE: hydrogen off gasing from sealed lead acid batteries
1. The batteries are supposedly sealed. If so how does the H2 get out?
I am just a former nuclear submarine electrician - we had 5,000 AH 250 volt lead acid battery and yes we generated H2 and ys we were concerned - that is why we had two H2 detectors, a battery well exhaust fan, adn two H2 burners.
IF we had the diesel running (rarely) we could take a suction off the battery well and run the H2 thru the engine.
DO NOT seal this battery box -
how do you access for maintenance
how do you prevent condensation? this is a boat you WILL get condensation
VENTILATE the box.
Use a blower to blow air IN
-- dont need to worry about H2 igniting in the blower and you avoid stagnation and gas pockets in the bos
and exhaust the box at a safe place or take a suction and run the gas thru the engine.
Dan Bentler