Re: (ET) Golf cart batteries

["David Roden" <etpost drmm net>]

I asked Nawaz Qureshi about the concrete floor stories.  Nawaz is a 
degreed 
electrochemist and vice president of engineering at US Battery.  Here is 
what he said :

"From what I know, this sitting on concrete causing self discharge is a 
myth. 

"It started when the batteries were made in rubber cases and there was 
some 
reaction between rubber and concrete causing the case to develop micro 
fissures.  The micro fissures caused the acid (electrolyte) to seep out 
creating an electrolytic current conductive path between adjacent cells. 
It 
is like having a hole in the cell wall creating a short between the 
negative 
and the positive of the adjacent cells since they are welded together for 
a 
series connection.  

"As for the temperature gradient theory, the temperature gradient cannot 
exist for long periods of time, and even if it did, I do not see how that 
would accelerate self discharge."


David Roden - Akron, Ohio, USA

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