Quote:
Originally Posted by SPL
Pete4 — The actual portion of the NiMH battery's capacity that is used is more like 40% to 80% of full capacity. (This is based on numbers in a Toyota patent, and on what I have read elsewhere.) In any event, it's much less than full capacity. You're right about the reasons for this; it's to prolong battery life. The problem with current LiIon batteries is that, although they hold about twice the charge of NiMH batteries (per weight and per volume, I believe), they must be restricted to about half the usable range of current NiMH batteries in order to get the same number of charge/discharge cycles. This means that you're back to square one — no increased usable capacity!
Stan
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I am trying to understand this better. Please help me out. My understanding was that the Prius and TCH use the range from 60% SOC to 90% SOC in normal operations. So that is 30% of full rated capacity. Are you saying that Lion would use 15% of the rated full capacity? If so, then I agree there is no net gain.