Jan Steinman via EV wrote:
The fashionable way to balance is by switching a resistor (or some
equivalent) across the cells if they get high while charging.
Seems like a job for power MOSFETs, no?
Then, you'd have a voltage-variable resistor that could handle the boundary
conditions you cited.
Except that MOSFETs normally fail shorted. Then you need a fuse or
something to handle the shorted-MOSFET case. Resistors have the
advantage that they don't normally have a "shorted" failure mode.
Also, most MOSFETs aren't rated for linear operation. They have a habit
of being unstable or oscillating.
Lee Hart
--
If happiness is on your mind, here's a daily list to find:
- something to do
- something to look forward to
- someone to love
- someone to take good care of
- and misbehave, just a little
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
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