Lithium-Ion chargers (Somewhat off subject) and MORE

[Dean Pappas]

Hi Jimm,
I guess I'm not surprised to see the guys at FMA doing this first.
 

Dean Pappas 
Sr. Design Engineer 
Kodeos Communications 
111 Corporate Blvd. 
South Plainfield, N.J. 07080 
(908) 222-7817 phone 
(908) 222-2392 fax 
d.pappas at kodeos.com 

-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On Behalf Of J.Oddino
Sent: Friday, October 15, 2004 1:53 PM
To: discussion at nsrca.org
Subject: Re: Lithium-Ion chargers (Somewhat off subject) and MORE


FMA is developing a similar pack/charger.  They put a 3200 mah cell and a 700 mAh cell in series and ran 700 charge/discharge cycles on it.  I think you are right that single cell charging is the secret.
Jim

----- Original Message ----- 
From: Richard Strickland <mailto:richard.s at allied-callaway.com>  
To: discussion at nsrca.org 
Sent: Friday, October 15, 2004 10:07 AM
Subject: Re: Lithium-Ion chargers (Somewhat off subject) and MORE

I've been doing a little research and I'm sure liking Tanic's individual cell tap approach for balancing and EASILY checking condition--I think my next charger will be one that does multiple individual cells--anyone make one?  I've gone WAY past thinking this is going to be economical to start--but there are certainly ways to minimize the problems and maximize the usage of the equipment.  Someone was talking about the bearings in the motors shooting craps after 100 flights or so--How about seals?  When you think about a brushless motor--it's basically solid state EXCEPT for the bearings--not really a helluvalot to go wrong with it.  The battery guys are saying 'hundreds' of charges if treated properly; so if you could get 'hundreds' of flights from the motors with virtually absolute reliability--what does that do to the recently mentioned cost analysis?  How about the cost of vibration? Lost time when things just don't run right?  I'm getting more turned on to this stuff the further I get into it.
 
Richard S.

----- Original Message ----- 
From: Koenig, Tom <mailto:Tom.Koenig at actewagl.com.au>  
To: discussion at nsrca.org 
Sent: Thursday, October 14, 2004 8:29 PM
Subject: RE: Lithium-Ion chargers (Somewhat off subject)

Richard,
 
I would not risk it ( unless you wanna burn your office down!) and Li-Pos require a different charging algorithm as far as I am informed. 
 
I use a Schulze charger and since I have been using it......all others I have ever owned previously have been 'disposed of'.
 
Tom

-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On Behalf Of Richard Strickland
Sent: Wednesday, 13 October 2004 6:55 AM
To: NSRCA
Subject: Lithium-Ion chargers (Somewhat off subject)


As am trying to regain control of my office; I ran across a lithium-ion charger for cell-phones we have discontinued using.
So we have a number of these laying around(mini boat anchors).  Since I am ignorant on battery stuff--could these be converted for our use on li-pos( 5.9v at 400 <mailto:5.9v at 400>  ma)? Or is the charging circuit protection in the phones?  Just curious.(and cheap)
 
Richard S.


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