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FWC
Jan 11, 2021Explorer
Please not the SiO2 debate again ;)
SiO2 has the same energy density (volume and mass) as any other lead acid battery. If you want a higher energy density then lithium is really the only way to achieve that.
As for charging, with an LiFePO4 cell you will reach full charge (or at least 95% SOC) with any voltage above 3.4V/cell or about 13.6V for a 4-cell series pack. Going to 14V or above won't get you any more charge, and if anything tends to push the cells out of balance.
There is some excellent test data from powerstream showing just this:
https://www.powerstream.com/lithium-phosphate-charge-voltage.htm
SiO2 has the same energy density (volume and mass) as any other lead acid battery. If you want a higher energy density then lithium is really the only way to achieve that.
As for charging, with an LiFePO4 cell you will reach full charge (or at least 95% SOC) with any voltage above 3.4V/cell or about 13.6V for a 4-cell series pack. Going to 14V or above won't get you any more charge, and if anything tends to push the cells out of balance.
There is some excellent test data from powerstream showing just this:
https://www.powerstream.com/lithium-phosphate-charge-voltage.htm
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