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Internal battery FT-817ND

 

If you have a fully adjustable power supply for voltage and current limiting, all of that can be lumped together as a single overall limit to suit the entire setup observing the specs of all elements. It's from that perspective that I commented.

Joe?



On Thu, Oct 10, 2024 at 4:52 PM, G0FTD via groups.io
<andyfoad@...> wrote:
On Thu, Oct 10, 2024 at 12:15 AM, Joseph Wonoski wrote:
So you're saying that there's two kinds of current limits?
Yes and no.
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The initial inrush current *could* be interpreted as what your charger PSU
might have to handle if you try charging a discharged pack with it and
thus the charger / psu should really be built to handle this current if
you don't want to let out any magic smoke from it.
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This is normally higher than the SAFE charging / float current, which of course
should be limited to approc 1/10th of cell capacity.
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So if you had a 10ah pack then you never really want to have 1 amp flowing
at any one time into it, otherwise you you'll screw the cell pack.
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That's it ;-)
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Andy
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On Thu, Oct 10, 2024 at 10:27 PM, Joseph Wonoski wrote:
If you have a fully adjustable power supply for voltage and current limiting, all of that can be lumped together as a single overall limit to suit the entire setup observing the specs of all elements. It's from that perspective that I commented.
Yep, and fully understood ;-)
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My so called bench PSU failed a few years back, not got around to replacing it,
but I used to use that for charging my 7ah gell cell.
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(Will one day build my own when I get time).
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In the meantime I just insert a 22 Ohm wirewound resistor in series with a bog
standard 13.8v PSU and that does the trick.
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73 de Andy

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