[NSRCA-discussion] Landmark for e-pattern: >1C charging

Wed Mar 15 06:00:10 AKST 2006

 I did find this posted by Charlie Wang on rcgroups, there doesn't seem to
be much difference in time for full charge and fast charge at 3C. this was
posted 3 days ago.

I have just finished studying the effect of 3C charging with Thunder Power
ProLite batteery packs.
Equipment used are TP1010C charger with any of the TP balancer
1)Charger set to full charge:Charge time is 26 minutes(charge to 97%/4.175V)
2)Charger set to fast charge:Charge time is 23 minutes (Charge to 95%/4.16V)
Charging at 3C with TP1010/balancer for Power ProLites batteries will give
you the same cycle life as charging at 1C.
This is after a 4 months test with thousands of charge cycles.

I think 23 minutes to 26 minutes charging will become the standard of
2006/2007.

Regards,
Chalie

Steven Maxwell

> [Original Message]
> From: Cameron Smith <dentdoc007 at adelphia.net>
> To: NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>
> Date: 3/15/2006 8:55:47 AM
> Subject: Re: [NSRCA-discussion] Landmark for e-pattern: >1C charging
>
> Adam,
>  By all means I will quadruple check with the guys.
> So far results have been good.
>
>  Good example of doing your homework before you get into 2C 3C or more
> rate charging! But it's coming.
>
>   Remember most manufactures DO NOT recommend this yet!
> TPs leader is Beta testing. Others are field testing.
> Solid charging practices should be followed. 
>  IF IN DOUBT -DON'T!
>
>
>
>
>  -----Original Message-----
> From: nsrca-discussion-bounces at lists.nsrca.org
> [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Adam
> Glatt
> Sent: Wednesday, March 15, 2006 8:11 AM
> To: patternrules at earthlink.net; NSRCA Mailing List
> Subject: Re: [NSRCA-discussion] Landmark for e-pattern: >1C charging
>
> Chad and I tried the 1010's 'Fast Charge' setting on one of the initial 
> V1.85 version chargers last month.  We found the end voltage to be 
> inconsistent because the balancer didn't have enough time over 4.1v/cell
>
> to balance the pack, so the charger would get the pack to like 
> 4.18v/cell, quit, and then the balancer would drop voltage by an amount 
> determined by the condition of the pack - this is bad if you want to 
> series discharge and series charge (though series charging is limited to
>
> about 0.95C).
>
> You guys should try the Fast Charge setting and watch the cell and pack 
> voltages compared to 100% charge setting.  Maybe it was just the 1.85V 
> firmware, or the packs.
>
> -Adam
>
> Steven Maxwell wrote:
> >  If your using the 1010 charger and the 95% charge means your doing a
> full
> > charge if you change to the fast charge which is 97% your charging
> time
> > should decrease alot, the fast charge takes out the final steps of
> charge,
> > you might ask on RCGroups either everydayflyer or Charlie Wang will
> answer.
> > Maybe Adam will answer here.
> >  Steve Maxwell
> >
> >
> >   
> >> [Original Message]
> >> From: Cameron Smith <dentdoc007 at adelphia.net>
> >> To: NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>
> >> Date: 3/15/2006 7:43:23 AM
> >> Subject: Re: [NSRCA-discussion] Landmark for e-pattern: >1C charging
> >>
> >> I have been using that charging combo.
> >>                       
> >>  Charging 4 new TP 2100mah Prolites @ 1.5C to 95% capacity in about
> 35
> >> Minutes. (On 2 charger combos)
> >>  This yields easy 10 minute flight on a 300+ watt system per battery,
> >> using around 1600-1700 mah. 
> >>  
> >> After following Charlie's advice I tried 2C but only gained less than
> 4
> >> minutes in charge time so I backed it down. I pay for my packs so I
> want
> >> to see others do 3C for a longer period of time before I "Crank it
> up"
> >>
> >>  After doing this the old 1C rate/single charger for a couple years
> now,
> >> 4 times as much in 1/2 the time is Cool!
> >>
> >>  I agree with Adam, This is good news for electrics.
> >>
> >>
> >>
> >> -----Original Message-----
> >> From: nsrca-discussion-bounces at lists.nsrca.org
> >> [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Adam
> >> Glatt
> >> Sent: Tuesday, March 14, 2006 11:16 PM
> >> To: NSRCA Mailing List
> >> Subject: [NSRCA-discussion] Landmark for e-pattern: >1C charging
> >>
> >> http://www.rcgroups.com/forums/showpost.php?p=5182816&postcount=24
> >> That post is by Charlie Wang, head of Thunder Power.  Charlie has
> been 
> >> running cycle test experiments where he cycles Thunder Power Pro Lite
>
> >> batteries with 2C and 3C charge rates, and 4C discharge rates.  His 
> >> experiments have convinced him that 3C charging of Thunder Power Pro 
> >> Lite batteries does not harm the batteries.
> >>
> >> This is a major step for electric R/C.  Consider a situation with one
>
> >> charger, two batteries, and 10 minute flights - low cost, typical 
> >> pattern and sport equipment.  Charge times are inside of 30 minutes.
>
> >> Allowing 5 minutes for pack cool-down, it is possible to log 5
> flights 
> >> in less than 2 hours.  In a pattern situation this isn't yet
> possible, 
> >> because it takes a 16A charger to charge the 5.3Ah pack at 3C and
> they 
> >> don't exist.  Using available chargers, two TP 1010's ($320-$400),
> two 
> >> TP 210 balancers ($140-$200), and four 5s4p5300 packs ($1100-$1300),
> the
> >>
> >> time for 5 flights would be something like 130minutes.
> >>
> >> 3C charging (currently 2C with pattern packs and available chargers) 
> >> allows you to fly just as much with fewer batteries.  That saves
> outlay 
> >> costs, if not cost per flight, and certainly reduces the length of
> time 
> >> you are stuck with current technology.
> >>
> >> More good news from the electric world.
> >>
> >> Those of you planning on charging at >1C, make sure you read
> Charlie's 
> >> post.  He gives specific guidelines and practices.
> >>
> >> -Adam
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> >
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