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Old 10-09-2019, 06:11 AM   #13 (permalink)
RedDevil
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Red Devil - '11 Honda Insight Elegance
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In one way LiFePO4 is even more sensitive than other chemistries. The cell voltage is very strongly tied to the 3.2-3.4 Volt range and varies little between 1% and 99% charged. So you can't walk away for a minute while all cells charging at 3.4 Volts per cell; once full it jumps to over 4 Volt very rapidly, where the damaging takes place.

My BMS starts balancing at 3.65 Volt per cell and shuts down charging at 3.85 Volt.
Charging a pack of 12 Ah cells at 3A, there's just a few seconds in between.
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2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
lifetime FE over 0.17 Gmeter or 0.1 Mmile.



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