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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061
Hi all. I'm sure you've heard about me being scammed by DealE****me.
needless to say my electric bike project is now in the words of John Cleese, "bleedin' demised"
does anyone have any ideas? i now have no free time and even less cash (going to have to sell the original lead acids on to make some money back)
i've been told not to risk using lipoly cells as the ones i have are totally unmatched and in bad condition as they are from apple macbook packs, so as of now its dead in the water.
the original plan was to use this thing to get to work and back to save a bit on petrol.
thanks,-A
"Bother" said Pooh, as he played Russian Roulette with a semi...
Registered Member #103
Joined: Thu Feb 09 2006, 08:16PM
Location: Derby, UK
Posts: 845
that's pretty much exactly what happened to me, never finished my electric bike project, and over a year later I'm still cycling to work... well most of the time
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061
i did have a thought. the cells that do work aren't that bad (the internal resistance is high) .. reckon they would be useable for solar lanterns? LiFePO4 doesnt seem as delicate as Li-Ion so it would make sense.
Registered Member #2099
Joined: Wed Apr 29 2009, 12:22AM
Location: Los Altos, California
Posts: 1716
Conundrum wrote ... ..reckon they would be useable for solar lanterns? LiFePO4 doesnt seem as delicate as Li-Ion so it would make sense.
Life in an outdoor solar lantern is subject to rather harsh temperature extremes. Not much you can do about freezing temperatures in the winter (which oughtn't'a bother Li-based batteries). Under the sun on a hot day they can get quite toasty, esp. with a photovoltaic-cell roof. Good thermal design can minimize the battery temperature rise above ambient.
I once salvaged photovoltaic panels from some primitive solar lanterns whose gel-cell batteries had all dried up. Since the advent of white LED's, the lanterns need much less photovoltaic and battery capacity.
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