Thanks for responding.
Yep. about 1 min discharge - load can vary a bit. I can use pretty much
any voltage, but the lower the voltage, the higher the current and I'll
need huge cables and disconnects. The higher the voltage, the more cells
and cell monitors I need, plus need for higher voltage components. Cost
goes up.
I could use an inverter, but I still have the disconnect problem. Let's
say I paralleled groups of cells so that I have about 11V. Then I'd have
about 600A. That's huge. Or 22V, 300A, still huge. Can I get a
disconnect for that ?
Peri
------ Original Message ------
From: "jkenny23 via EV" <ev@lists.evdl.org>
To: ev@lists.evdl.org
Cc: "jkenny23" <jkenn...@gmail.com>
Sent: 18-Apr-20 6:06:08 PM
Subject: Re: [EVDL] custom battery
You got me stumped. What application do you need only 85WH at 6.6kW for?
That's a discharge period of 46 seconds if I have my math right...
Do you truly need 240VDC for this application also? What about using the
first stage of a 6.6kW 240VAC inverter, which would produce a high voltage,
high power DC rail from a much safer/more manageable battery voltage (e.g.
24 or 48V), though there will be a size and efficiency impact by adding
this. I think it would easily offset the complexity in BMS and charger to
manage a 240VDC battery pack though.
The question of cycle life is interesting.. I could try some experiments
around this now with my high power cycle tester.
--
Sent from: http://electric-vehicle-discussion-list.413529.n4.nabble.com/
_______________________________________________
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
ARCHIVE: http://www.evdl.org/archive/index.html
INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
_______________________________________________
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
ARCHIVE: http://www.evdl.org/archive/index.html
INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
