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

Wed Mar 15 08:12:58 AKST 2006

On practice flights I normally use about 70% capacity. Did Charlie Wang 
indicate anything about this aspect ?
                                        Nat
----- Original Message ----- 
From: "Steven Maxwell" <patternrules at earthlink.net>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Wednesday, March 15, 2006 8:59 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
>> [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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