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From: James Meyer
Subject: 48 Volt Rechargable Lithium Ion battery Pack?
X-Newsreader: Forte Agent 1.91/32.564
Date: Thu, 26 Sep 2002 10:18:20 GMT
NNTP-Posting-Date: Thu, 26 Sep 2002 06:18:20 EDT
I'm presently using three, 16 Volt, LiIon battery packs in series to get
a 48 Volt power source. I'm doing that because 4-cell packs seem to be the
maximum number of cells that are readily available "off-the-shelf". Also,
charger chips seem to max out at 4 cells as well.
The major problem is the complexity of having to have three chargers in
the system. All the charger control chips I can find don't have isolated
outputs and I need use a single charging supply. That means that I have to
switch the packs from series when operating to a configuration with all the
negative ends connected together for charging.
Life would be much simplier if there were LiIon battery packs with
twelve cells in series and charging devices to match.
Has anyone seen any examples of commercial equipment using 48 Volt
rechargable LiIon batteries? Since the TelCom industry is heavily into 48 Volt
stuff, perhaps something there?
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