Lee Hart via EV wrote:
But if you're determined to proceed, I think the modifications were
written up and are in the EVDL "files" section somewhere.
EVDL Administrator via EV wrote:
http://evdl.org/pages/iotamods.html
That's it! Thanks, David. :-)
Another approach that will probably provoke some controversy here is to tap
your battery at the DC:DC's nominal voltage.
That's a bad way to do it. It's almost certain to unbalance the pack. If
you have some kind of balancer, it may be able to hold the pack in
balance despite the unbalanced load. Then again, maybe it can't; and you
murder your pack.
Yet another way to do it, crude and somewhat wasteful, might be to build a
lossy regulator circuit to drop the battery voltage to the DC:DC's voltage.
That could work, if the load is small. Or if you use a switchmode buck
converter to step down the pack voltage to something your DC/DC
converter can handle.
Here's still another thought. I have a slightly-used Todd PC20LV 96-volt
DC:DC here, and also a used Curtis 1400E 72-96 volt DC:DC. Both were in
working condition last time I checked (January 2019). You might be able to
connect each to half the battery, and sum their outputs through diodes.
That's possible. However, the two DC/DC converters are not likely to
track, or have any way to make them share the load equally. But you
could use two identical supplies that have provisions for paralleling.
Lee Hart
--
A designer knows he has achieved perfection not when there is
nothing left to add, but when there is nothing left to take away.
-- Antoine de Saint Exupery
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
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