The discharge resistance decreases.
The charge resistance increases.
On Wed, Jun 7, 2023, 3:14 PM wrote:
> I get what you’re saying. Sounds like the worst outcome I can get is
> warm batteries.
>
>
>
> Where I’m confused is I’m reading that resistance decreases as state of
> charge rises
Most rooms and buildings are leaky enough that the hydrogen will find a way out
through the ceiling and roof. It goes straight up. And it has to be a 4% or
richer mixture to actually explode. I have never heard of an explosion due to
battery outgassing. I am sure it has happened but I
You know what led me down this path about overcharging?
According to the maintenance manual for the Enersys SBS 190F, they produce
7.23ml of hydrogen per hour while float charging. Being VRLA they're
supposed to reabsorb that hydrogen under normal circumstances. Even if the
valves were
“When charging process, the battery's internal resistance (ric) is low and will
increase according with increasing the level of SoC. While at the discharging
process, the battery's internal resistance (rids) is low and will increase in
proportional to the decreasing of the SoC level.”
That drawing shows the true, real, “internal resistance” the resistance that
will warm up the battery with current flow. The resistance that limits short
circuit current. The resistance that causes a small voltage drop when powering
something.
The thing that can be thought of as the
These are supposedly measurements from a wheelchair battery:
Resistance dropping as open circuit voltage increasing. Maybe this guy can’t
read his meter right.
From: ch...@go-mtc.com
Sent: Wednesday, June 07, 2023 3:13 PM
To: dmmoff...@gmail.com; 'AnimalFarm Microwave Users
I guess that should be effective resistance is rising. Got it backwards.
From: dmmoff...@gmail.com
Sent: Wednesday, June 7, 2023 1:07 PM
To: 'AnimalFarm Microwave Users Group'
Cc: ch...@go-mtc.com
Subject: RE: [AFMUG] battery overcharging
I get what you’re saying. Sounds like the worst
I get what you’re saying. Sounds like the worst outcome I can get is warm
batteries.
Where I’m confused is I’m reading that resistance decreases as state of charge
rises (and also decreases from heat). If resistance is dropping, and we’re at
a constant voltage, why is the current also
Or charging a capacitor.
From: Chuck McCown via AF
Sent: Wednesday, June 7, 2023 12:02 PM
To: AnimalFarm Microwave Users Group
Cc: ch...@go-mtc.com
Subject: Re: [AFMUG] battery overcharging
Another metaphor would be inflating a tire to 32 lbs with the compressor
pressure set to 32 lbs.
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
Sent: Wednesday, June 07, 2023 2:10 PM
To: AnimalFarm Microwave Users Group ; dmmoff...@gmail.com
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
On 6/7/2023 10:04 AM, 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
Another metaphor would be inflating a tire to 32 lbs with the compressor
pressure set to 32 lbs. Once the tire is full the air will stop flowing.
From: Forrest Christian (List Account)
Sent: Wednesday, June 7, 2023 11:58 AM
To: AnimalFarm Microwave Users Group
Subject: Re: [AFMUG] battery
Ignoring the overvoltage for a minute..
A normal battery, when charged at a normal voltage, will take less and
less current until full. It doesn't matter how much current is available,
it will only take what it needs. Generally you want to limit the current
based on the size of the array,
That is for a voltage supply. If you got your hands on a constant current
charger, then that could be ungood with lead acid.
From: dmmoff...@gmail.com
Sent: Wednesday, June 7, 2023 11:04 AM
To: 'AnimalFarm Microwave Users Group'
Subject: [AFMUG] battery overcharging
So I was looking at a
The effective resistance of the battery increases as the charge increases to
the point that the current will just stop (except for a little leakage current)
when the cells are full. Unless you have the voltage set too high. Then they
will boil (really outgas, but it looks and sounds like they
visualize an over-charged battery exploding.
On 6/7/23 10:04, 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.
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
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