Re:Graphene improves lithium-ion battery capacity and rechar...
by fryguy on Thursday November 17, 2011 @08:56PM
(#3250192)
That's why I added the "...and manufacturing technology" part at the end. What I've seen is that a company will have a whole line of cells of varying capacities all at the same discharge "C" rating.
To be honest, I'm too worried about discharge rates, since we use them in combat robots, which are designed to last 3 minutes (which ends up being 20C continuous discharge rate). If you consider that you want at least 2 minutes of "full throttle" power over the course of a charge of the batteries, the capacity of them must be enough that the maximum current would be 30C, otherwise the batteries would be dead from just the hot rodding. Being that you're driving more than the 2 minutes of full throttle, I'd suspect that any batteries with enough capacity for an hour drive would have enough discharge rate to support what you needed to do.
Personally I don't really care too much about charging rates. My battery powered vehicle would be parked overnight. But I do like acceleration. And that's where discharge rates (and other problems) become an issue.