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Thanks very much for all the input.
I believe at this stage from my research that epsom salts which I think is magnesium sulphate ( I will check as I would have learnt that in high school) works well as an electrolyte...I will look into this aspect again as I have not considered the chemistry yet.
Explosions can occur from hydrogen and batteries need to be well ventilated.
The reason I am thinking about this is the high cost of large batteries.
I recently purchased 6 2volt batteries (little more than 2) to provide a 12 volt system of 1140 amp hours and that was about $4500.
I would like a greater capacity and so have started to look at what I could build.
So far the idea is...
6 containers ( each to house a 2 volt unit) the total providing 12 volts (approx but you should end up at about 13.5 colts for a 12 volt battery☺)...each container made of concrete formed around and holding plastic "boxes" or alternatively fibre glassed concrete boxes and painted with tar...they will be outside under cover and given the weight will never be moved.
Each "plate" to consist of 1.5 meters by 30 cm. of lead flashing folded to fit in the box...say 5 or 6 folds for each plate and fiber glass mat to seperate the folds... I have a few ideas how to form and attach a terminal to each plate ... this is not a problem...two such folded units fit in the box and these to be separated by a layer or two of pink bat (the stuff you place in the roof☺)...
Hopefully as I said epsom salts works as the electrolyte as I dont fancy buying or making sulphuric acid...
I dont think one needs dis similar metals as this is an accumulator ...as are most units commonly called batteries.
If the indicator of 1amp per square in applies (Which may be at 2 volt or 12 volts???) I can work out a range of expectation for storage.
Needless to say I will build a smaller proto type before going big...but for now I will do some calculations for the large model which although a wide range will give me a starting point.
Thanks again.
I had hoped that we had a member who may have built one.
I dont see any environmental concerns if using epsom salts and I think by venting each cell and placing the cells outdoors under cover will prevent any dangerous hydrogen build up.
Alex
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