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04-05-2010 11:05 PM  8 years agoPost 1
helinutz

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Bournemouth, Dorset, UK

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Is there an aftermarket meter that i can plug in to a balance cable to measure the internal resistance of my packs?
My current charger config doesnt offer this option (1010C) and I dont want to spend a load on a new charger just for this facility.

>>>>>I'm so broke, I cant even pay attention!<<<<<

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04-05-2010 11:05 PM  8 years agoPost 2
aussie_g

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Travelers Rest, South Carolina, USA

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Try a digital multimeter....

Gareth

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04-05-2010 11:08 PM  8 years agoPost 3
helinutz

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Bournemouth, Dorset, UK

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I was hoping for something to easily plug into a balance lead that gives a digital readout of each individual cell.

>>>>>I'm so broke, I cant even pay attention!<<<<<

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04-05-2010 11:10 PM  8 years agoPost 4
Justin Stuart (RIP)

rrMaster

Plano, Texas

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My iCharger 208B will measure internal resistance.

Avant RC
Scorpion Power Systems
Thunder Power RC
Kontronik Drives

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04-05-2010 11:48 PM  8 years agoPost 5
ex-celler

rrNovice

MA

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Seriously, why do you care what the IR number is?

Is the battery getting warm on the charger? IR is increasing.

Is the resting voltage less than 4.2v per cell off the charger? IR is increasing.

Beyond that, why does it matter? It's not like you can turn a screw to lower it.

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04-06-2010 06:21 AM  8 years agoPost 6
helinutz

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Bournemouth, Dorset, UK

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True I suppose, but its just another way of quantifying how good/bad my packs are, and as I said, if theres a cheapish simple option to do this, I wouldnt mind having the extra info to hand

>>>>>I'm so broke, I cant even pay attention!<<<<<

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04-07-2010 05:23 PM  8 years agoPost 7
Joe90

rrApprentice

Quebec, Canada

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You need a load
Measure A and voltage drop

Based en V=RI
R = V/I

V= Battery Voltage drop
A= Current trough load

There is other way to measure IR but this is the basic way to do it.

See this link for more details
<<http://www.buchmann.ca/Chap9-page2.asp>;>

The lower the internal resistance the loewr the voltage drop.
Lower IR make the punch

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