Running on 16 Volts

[serialk11r]

Originally Posted by jray3

Thx Daox- I've searched but not found those posts by OrangeBoy. I asked this because I just traded for a good batch of T-875 batteries, but this 'mild PHEV' strategy might be much better suited for four Lithium cells. They would be fully charged at 16.8V, much kinder to the light bulbs, and when the alternator kicks on at 14.4V, they would be 95% discharged. That's a deeper cycle than I'd normally want to go, but that point in time could be chosen via cell capacity, and stopped sooner with a battery disconnect switch. I've still got a 3000 uF ultracap pack to run in parallel with the alternator and smooth out the loads. I'm trying to avoid the complexity shown in the failed People's Hybrid venture.
http://www.peopleshybrid.com/news.htm#feb_09

16.8?? A 5 cell LiFePO3 is that? Why not use a 4 cell that's nominal 13.2, max 14.4 like all the usual lithium drop in replacements?

[jray3]

Originally Posted by serialk11r

16.8?? A 5 cell LiFePO3 is that? Why not use a 4 cell that's nominal 13.2, max 14.4 like all the usual lithium drop in replacements?

Well, cell specs say 4.2V is fully charged (max 4.32V), hence 16.8V nominal. 14.4V/ 4 cells would only be 3.6V, or less than 70% SOC according to the Thunder-Sky manual.

http://www.thunderstruck-ev.com/Manu...t%20Manual.pdf

My i-MiEV never goes below 3.6Vpc, even at 0% SOC.

What are some of the usual lithium drop in replacements? I haven't seen anything other than overpriced and low capacity plastic boxes aimed at the ricer crowd, such as
Amazon.com: Braille Battery ML7S 12 Volt Lithium Battery: Automotive