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

Steven Maxwell patternrules at earthlink.net
Wed Mar 15 06:55:13 AKST 2006 

 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
> > > >>
> > > >> 
> > 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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