Paul Dove via EV wrote:
That was a very good summary. Cell balancing is something that was
done with other chemistry a and many have tried to apply it to Li Ion
chemistries but it doesn't work with Lithium since cells do self
discharge or drift.
If one wanted to balance them it has to be done below 3.38 volts
otherwise you are still charging the cell. Thanks for your input.
Lithiums need balancing even more than other chemistries! You can only
get by without a BMS if the cells are so well matched that they
accidentally stay in balance. (Do you feel lucky?)
Look at my own balancer at http://www.sunrise-ev.com/balancer.htm
I built it to *use*, not to sell. It doesn't load the cells, or clamp
the voltage at some arbitrary level, and doesn't have failure modes that
murder cells.
It basically does what you would do yourself, if you had the time and
inclination. It measures the voltage of every cell, and charges the ones
that are low.
--
The greatest pleasure in life is to create something that wasn't
there before. -- Roy Spence
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
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