Navitron Renewable Energy and Sustainability Forum

Energy/Electricity Storage and Use/Grid Connection => Off-Grid, Batteries & Inverters => Topic started by: biff on November 30, 2010, 07:56:04 AM



Title: forklift batteries in the freeze,
Post by: biff on November 30, 2010, 07:56:04 AM
hi folks,
           we have a bit of a freeze here,-6 last night and -2 this morning. remember last year when the freeze came.? some of us were not quite prepared and our systems stopped working  below -8.(im not quite sure exactly,we had -12 for days) it is important to remember that forklift batteries are highly explosive babies and placing heaters etc next to them is really not the thing to do or will have to be thought through extremely carefully,. it is difficult to insulate them because they require good ventilation to the open air to prevent the buildup of gas.if by chance your system stops working ,,ie not charging or giving out the charge,do not worry it will return to normal once the temp rises.any attempt to force the charge into batteries below -8 will only result in damage to the batteries or controller.
       now i hope i have got that right ,wackoold
                                      biff


Title: Re: forklift batteries in the freeze,
Post by: tony. on November 30, 2010, 08:14:14 AM
I suppose you could sit them on a kingspan sheet and plywood and cut the same material to make boxes around the batteries,obviously not going higher than the battery itself.

Those with the cash to splash could buy a Ex rated heater!

Tony


Title: Re: forklift batteries in the freeze,
Post by: Iain on November 30, 2010, 02:16:04 PM
Hi
If it is any use, we started trickle charging the seaboats batteries when at sea in the colder climes. The boat was kept on the upperdeck of the ship. When it was very cold the batteries were not able to start the boat engine due to the reduced capacity of the battery when cold. We started trickle charging the batteries (only about 1/2A -1A).
It was enough the keep the batteries from getting too cold and kept them active. Just had to remember to unplug them before launching the boat!!
Iain