Tuesday, Dec 20, 2005 at 17:36
Hi Moose
>Is there a way to circumvent the issue of the internal
>impedence rising and leading to reduced current acceptance?
I don't think so - it's a function of the battery accepting charge although we're beginning to touch on the chemistry now and I don't have a clue about that :)
>For example if one stopped charging after say 1 hour
>and let the battery sit for another hour and then started
>charging again would that do any good?
Not much, I don't think. You would see a little settling of things but provided the battery is in good condition it will have retained the charge it accepted during that hour so you might get a bit of a current pulse for a minute or two but nothing to make any difference.
The only way to get more current into the battery (or remain at the same level as the initial charging current) whilst the battery charges is to increase the voltage of the charging source - which is what constant current chargers do – although there are issues with this: if you force in more energy than the battery's chemical process can convert it will be wasted as heat and if there is too much heat it may cause damage to the battery internals but provided you don't stray too far from the data sheet for the battery all should be
well - which is why I'm happy for my GMC gen with it's crude output to charge my big battery (big thermal inertia) for a few hours but when I use it on my 7Ah SLA I put a 0R22 5W resistor in series
Now as you're a nuclear physicist I've got this question about Chaos Theory.... :)
Mike Harding
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