[NSRCA-discussion] Landmark for e-pattern: >1C charging
Chad Northeast
chadnortheast at shaw.ca
Wed Mar 15 07:02:05 AKST 2006
Yep :)
I have been charging at 2C on my 3s 2100's (Trex heli packs) for about a month now. I was going to buy more packs for indoor as there was not much time to charge but in about 30 minutes even at 2C I am 90-95% recharged for another flight. With two chargers going, and 3 packs...I can stay in the air pretty much non-stop with 8-10 minute flights.
I plan to let someone else experiment with charging the bigger packs at 2C though :) I have enough big packs that I dont have to field charge much....and I can charge at a normal rate while at home.
Chad
----- Original Message -----
From: Steven Maxwell <patternrules at earthlink.net>
Date: Wednesday, March 15, 2006 8:54 am
Subject: Re: [NSRCA-discussion] Landmark for e-pattern: >1C charging
> Not only that Chad think about how many lost sales of battery
> (smaller at
> this time)packs, faster charging don't need as many packs.
>
> Steven Maxwell
>
>
>
>
> > [Original Message]
> > From: Chad Northeast <chadnortheast at shaw.ca>
> > To: NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>
> > Date: 3/15/2006 10:22:01 AM
> > Subject: Re: [NSRCA-discussion] Landmark for e-pattern: >1C charging
> >
> > > I think 23 minutes to 26 minutes charging will become the
> standard of
> > > 2006/2007.
> >
> > For small packs maybe, but charging a 10s 5000 mAh pack at 3C
> requires a
> 650W charger! That Iota guy better get some more supplies in
> stock lol!
> >
> > Chad
> >
> > ----- Original Message -----
> > From: Steven Maxwell <patternrules at earthlink.net>
> > Date: Wednesday, March 15, 2006 7:59 am
> > Subject: Re: [NSRCA-discussion] Landmark for e-pattern: >1C charging
> >
> > > 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
> > > > [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
> > > > >> [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> > > >>
> > > > >>
> > > "
> target="l">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
> > > > >> _______________________________________________
> > > > >> NSRCA-discussion mailing list
> > > > >> NSRCA-discussion at lists.nsrca.org
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> > > > >>
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> > > > >>
> > > > >
> > > > >
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