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From: jmuchow@SPAMMENOTcamlight.com (John Muchow)
Subject: Re: Reducing contact resistance for low volt use?
Date: Thu, 12 Dec 2002 02:04:37 GMT
Organization: MindSpring Enterprises
References: <firstname.lastname@example.org> <email@example.com> <firstname.lastname@example.org> <email@example.com> <firstname.lastname@example.org> <3DF7BEB1.703937F@juno.com>
X-Server-Date: 12 Dec 2002 02:04:04 GMT
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>>>There could be an external power supply which pushes the current
>>>through the shunt and the rest of the outer circuit, and
>>>electronically adjusts that voltage to compensate the losses in the
>>>external part of the circuit, so the battery sees no outer resistance
>>>at all, or just the contact resistance?
>>>It might compensate for the contact resistance too, if that would be
>>>of any practical use.
>>>The voltage over the shunt could steer the outer voltage so it helps
>>>the battery without changing the current which the battery can push
>>>through the outer resistance, which now can be adjusted to be zero or
>>>whatever we want to set it to.
>>>When the current from the battery increases the outer circuit would
>>>sense that and automatically adjust the outer voltage to minimize the
>>>influence of the outer circuit.
>>>The power supply would compensate for both the shunt and the rest of
>>>the outer circuit.
So, the external power supply would have a voltage equaling whatever
is needed to compensate whatever is lost through
wire/connections/contacts...perhaps 0.3V at 100+ amps? And the cell
being discharged would be in series with the power supply?
Or would it use a much higher voltage and I would take it back down
someway (fixed resistor?) to only allow 100A max. to flow?
qrk and mike have also referred to external power supplies but I'm at
a loss as to how they would be used in my situation (I guess I don't
know enough to fill in the specifics). Gotta re-read the posts again.
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