No. I’m looking at a Vertiv Netsure 211 through the Network Control Unit and
wondering what the most horrible possible outcome of the worst possible
settings could be.
From: Bill Prince <part15...@gmail.com>
Sent: Wednesday, June 07, 2023 2:10 PM
To: AnimalFarm Microwave Users Group <af@af.afmug.com>; dmmoff...@gmail.com
Subject: Re: [AFMUG] battery overcharging
Are you attempting to build a smart charger? I think that's been done, and most
of the ones I've seen work pretty well.
bp
<part15sbs{at}gmail{dot}com>
On 6/7/2023 10:04 AM, dmmoff...@gmail.com <mailto:dmmoff...@gmail.com> wrote:
So I was looking at a rectifier config and trying to imagine the worst possible
thing I could do.
With some creativity I could start an equalizing charge that will run for 48
hours at 58.5 Volts. Normally it would stop when charge current hits a
configurable fraction of the C10 Ah rating of the battery, but by intentionally
misconfiguring the size of the battery and that fraction of Ah I could ensure
that the equalizing charge runs until the maximum time limit…..which I can set
as high as 48 hours.
I could also disable the battery current limit, disable the over temp shutoff,
and disable the temperature compensation.
If I’ve disabled the current limiting feature in the rectifier, what determines
the current that will go into the battery when I’m on a constant voltage
charge? The charger can do up to 100A, but would it put 100A into the battery
for the full 48 hours, or would some other factor limit it?
The spec sheet for the batteries lists an internal resistance of 3 milliohms.
V=IR tells me they could take thousands of amps at 58.5V. Is there any other
limit here besides resistance. If nothing else stops this machine from dumping
it’s full 100A into the batteries for 48 hours I’m pretty sure I could start a
fire or explosion with this rectifier if I wanted to. I’m not trying to commit
an act of sabotage by the way, I’m just wondering if a creative idiot could do
something terrible.
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