Alt-BEAM Archive
Message #10018
To: beam@sgiblab.sgi.com
From: "Sathe Dilip" sathe_dilip@bah.com
Date: Thu, 10 Feb 2000 13:01:22 -0500
Subject: [alt-beam] Re: NiCad Overcharging
I agree. Just to give you some numbers to play with, a standard NiCd
battery can be charged from its fully discharged condition to full
charge by charging it at 10% of the ampere-hour capacity (of the
battery) for 10 to 14 hours.
That means for a size AA NiCd battery, which has about 550 mAH capacity,
you will have to continuously charge it at 55 mA for 10 to 14 hours.
The extra hours take care of the losses of the charging process.
Usually if you charge it at less than 5% of the capacity, you can do so
without worrying about overcharging. Select your Solar cells with these
ratios in mind & you should be safe.
Dilip
Timothy Flytch wrote:
>
> Yes.... but how many amps are you planing on pulling??? I don't think you
> have to worry about it...
> Timothy...
> >I am thinking of using a cell to charge a NiCad battery to run a bot,
> >but isn't is possible to overcharge a NiCad?
----------------------------------------------------------
A conclusion is the place where you got tired of thinking.
----------------------------------------------------------
10019 Thu, 10 Feb 2000 13:03:52 -0500 [alt-beam] ....more new questions.... "BEAM Mailing List (E-mail)" "Scolman,Jim" Good morning, please be gentle with me as I am very new to BEAM and
electronics......as I understand so far, the solar cell is the collector and
the capacitor is the storage......within reason then, why not make both of
the parts as large as possible?.....are we dealing with the laws of
diminishing returns and/or entropy.......or would the bot be too heavy to
move?....or........this is all great stuff, thanks.....JWS.
Jim Scolman
AMS Services, Inc.
Bothell, WA
425-402-1000 x353
206-910-6095
scolmaji@amsworld.com
Network Administrator
Home