Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - its %$*&ing cold up here... (EV winterizing tips needed)

NiHaoMike · 12-13-2009, 08:01 PM

For Lithium batteries, colder is generally better. Thus the suggestion to refrigerate unused Lithium batteries.
http://www.thunder-sky.com/pdf/TS-LFP40.pdf
Thundersky specifies a minimum *operating* temperature of -45C or -49F. (It does not specify the minimum storage temperature, so just assume it's the same as the minimum operating temperature.) So it looks like Lithium is the way to go for cold climates.

It should be very easy to make a battery heater from old electric blankets. Just take out the resistance wire (which I think would be insulated in plastic so sweat cannot cause current leakage) and string it between the batteries.

12-13-2009, 08:01 PM	#9 (permalink)
NiHaoMike Master EcoModder Join Date: Sep 2008 Location: Texas Posts: 632 Thanks: 0 Thanked 26 Times in 24 Posts	For Lithium batteries, colder is generally better. Thus the suggestion to refrigerate unused Lithium batteries. http://www.thunder-sky.com/pdf/TS-LFP40.pdf Thundersky specifies a minimum operating temperature of -45C or -49F. (It does not specify the minimum storage temperature, so just assume it's the same as the minimum operating temperature.) So it looks like Lithium is the way to go for cold climates. It should be very easy to make a battery heater from old electric blankets. Just take out the resistance wire (which I think would be insulated in plastic so sweat cannot cause current leakage) and string it between the batteries. __________________ If America manages to eliminate obesity, we would save as much fuel as if every American were to stop driving for three days every year. To be slender like Tiffany Yep is to be a real hypermiler... Allie Moore and I have a combined carbon footprint much smaller than that of one average American...