[PSUBS-MAILIST] inside battery

[hank pronk via Personal_Submersibles]

Thanks' guys that is very helpful.  My reason for keeping the boxes full of oil is,, if the cable contacts come loose, they can spark, if they are flooded with oil the spark is harmless.  In Gamma's history, that happened, a spark made the hydrogen pop and it bent the floor board.  The oil displaces all the air in the box, that means the hydrogen bubbles will just form a hydrogen bubble between the membrane and the oil.  I can vent that off every time I charge the batteries.   The sub will not have any more O2 in it than the atmosphere  plus or minus 2% alarms will go off and I would adjust the level or surface immediately.  I guess if there cars a catastrophic failure with my O2 tank the pressure inside could reach a couple psi, but is that an issue?  I have never personally heard of a tank failing.   Thank again, big relief.Hank 

    On Monday, February 20, 2017 9:17 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
 

 Hi all, I may have made a bad judgment call, I added batteries to Gamma and was intending to put them in the escape pod.  I decided to just put them in the back of the hull instead.  I borrowed the batteries from Elementary 3000, they are lead acid in a fibreglass box, flooded with oil with a bladder top.  To my mind they are safe because they are flooded with oil.  At the same time, are they dangerous because they are flooded with oil.  I can's see why they are dangerous, but at the same time, I know people talk about the danger of oil in a sub.  I am not sure why?  I don't want to invest in AGM batteries yet because I am not totally confident I will be happy with the range.  I think I might need a diesel engine.  I have worked out the diesel engine idea but it is a 10K investment.  That is why I want to give batteries a try first.  What to do?Hank
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