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08.15.2009, 05:17 PM
Yah, precisely. Ideally, if you could increase the max charge voltage as you increase C rate. You can do this with A123's however, I usually use 3.7v/cell for charging 5 amps/cell for a 2p pack, and then 3.8v/cell, sometimes even 3.9v/cell at 10 amps for a 1p pack.
I would be interested in finding out how a G3 cell would handle a 4.3v/cell charge threshold at 5C rate. I could only do this using my programmable power supply however.
As resistance decreases in lipo cells even further, 4.2v/cell should be sufficient for 5C or more charging to get the benefit. Like you said, it is mostly limited by the cells Ri.
“The modern astrophysical concept that ascribes the sun’s energy to thermonuclear reactions deep in the solar interior is contradicted by nearly every observable aspect of the sun.” —Ralph E. Juergens
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