|
|
|
|
|
|
Spockie-Tech
Site Admin
Joined: 31 May 2004
Posts: 3160
Location: Melbourne, Australia
|
Interesting idea, but I cant quite see why it would help. I'm not disputing that it might, just that I cant see why..
Sure, the cooler wires and motor winders will present less resistance to current flow, but as Aaron noted, that will vanish in seconds of running. Wires dont take long to warm up..
And I would have thought that the colder batteries would have far less power available, since they are powered by a chemical reaction and cold slows most chemical reactions.
Thats why car batteries are always rated in "cold cranking amps". The hardest job for a car to start is on a cold morning, with thick cold oil, fuel that doesnt want to vapourise and a battery that is only sluggishly making power. So to deliberately make your batteries cold would seem to be the wrong way to go.
Perhaps however, their is a temperature point above which their resistance starts to increase significantly, limiting the power output more than the slower chemical reactions at the cooler temperature do ? So keeping the battery below that point, but not so cold as to limit the reactions is the ideal temperature ?
Hmm, one would have to do some intensive testing to map the internal resistance and the peak current as functions of temperature and find the crossover point where lack of resistance, but suitable reaction speed is in the sweet spot. anyone looking for a research subject ? _________________ Great minds discuss ideas. Average minds discuss events. Small minds discuss people
|
Sat Sep 18, 2004 9:34 pm |
|
|
|
|
|
|
|
|
|
|
|