Maximum sage discharge current ?  
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All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> Maximum sage discharge current ?
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Maximum sage discharge current ? - 5/26/2002 9:43:05 PM   
CrashMeister



Posts: 325
Joined: 2/28/2002
From: Atlanta, GA (Smyrna)
Status: offline 		What is the maximum safe discharge current that one can use for NiMH batteries ? 1C ? 1/2C ?

Thanks,
Craig.

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Maximum sage discharge current ? - 5/26/2002 9:57:30 PM   
Red Scholefield



Posts: 4906
Joined: 12/8/2001
From: Newberry, FL, USA
Status: offline 		It is governed more by the ability of the positive tab (internal) to carry the current.

On AA cells this is around 20 amps, for Cs sizes much higher 40-60 amps for short periods.

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Red S.
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Maximum sage discharge current ? - 5/26/2002 10:07:54 PM   
CrashMeister



Posts: 325
Joined: 2/28/2002
From: Atlanta, GA (Smyrna)
Status: offline 		Red, I meant for cycling the pack, not for general use. What is the safe discharge current to use when cycling ? I have been using 1C or less, and 1C for charging.

Thanks,
Craig.

_____________________________

Nothing is foolproof to a sufficiently talented fool...

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Maximum sage discharge current ? - 5/26/2002 10:37:14 PM   
Steve Lewin


 

Posts: 904
Joined: 3/18/2002
From: Reading, UNITED KINGDOM
Status: offline 		The maximum safe current is just that. In practise you can't use AA NiMH cells at anywhere near 20A because the voltage drops way too low.

If you're measuring capacity it makes sense to use the rate that you will actually be using but bear in mind that if you discharge A-size cells at say 10A you will measure lower capacity than if you do the discharge at a lower current. I think the manufacturers typically use C/5 for their measurements though Red can correct me if I'm wrong.

Steve

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