[RE-wrenches] Ni-Cad batteries - venting required?

[Darryl Thayer]

I hope that this helps, but far form complete:  Ni Cd batteries are called alkaline type, and use a water-alkaline electrolyte.  It does not participate in the reaction like lead acid.  If it is water based it will generate H2 and O2 on charging.  
so the out gas is the same as Lead acid,, and it will dry out if overcharged.  
Darryl


--- On Tue, 4/14/09, bill roush <billroush at gmail.com> wrote:

> From: bill roush <billroush at gmail.com>
> Subject: [RE-wrenches] Ni-Cad batteries - venting required?
> To: "RE-wrenches" <re-wrenches at lists.re-wrenches.org>
> Date: Tuesday, April 14, 2009, 4:25 PM
> Would these Ni-Cad batteries require venting like lead-acid
> batteries
> would? The engine generator is 250 kW and the batteries are
> Nickel-Cadmium
> type:  ALCAD Cell Type XHP52 (Qty. 20).
> 
> -- 
> Best,
> Bill Roush
> Heartland Solar Energy Industries Association
> www.hseia.org
> Heartland Renewable Energy Society
> www.heartland-res.org
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