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› TP 5000mah charging at 6c
03-12-2010 07:19 PM  8 years agoPost 1
Tday

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Needham, MA

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I've seen some of the threads on building a charger to handle the charge rates of some of the bigger, high charge rate batteries. I apologize in advance if this is a really basic question, but I couldn't quite figure my next step.

I have a great field power set-up. Honda generator (30a at 120v) paired with a 75 watt 14.5v power supply with a self-built (but not self-engineered) 4 station power panel mounted together with the power supply in a nice small package.

For my smaller, traditional LIPO batts---I use a 610 duo. For my TP 6s 5000mah 45C discharge rate 6C charge rate battery I have the 720i hyperion which maxes out at about 12a or so. It has a connector which splits it into two batts for shipping, of course, as they do now.

So, is my only hope to get a single charger that can push more current into the single charge lead? Or is there another way to double up the charger I have or charge the battery as two 3s batts.

Thanks,
Tom

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03-13-2010 10:08 PM  8 years agoPost 2
Jerry K

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Houston Area

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I find using the 720I on 5500 packs charging at 2c the packs are recharged in about 17 min which is plenty fast enough for me using two packs. If I could put out about 15 amps might be better but there is not enough difference between 2-3-4c charging like there is between 1c to 2c. 1c is very slow but jumping up to 2c made a big difference. Remember the last 10% is what takes most of the time. I have my chargers set to alarm at 95% continue to 100%

Jerry

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03-14-2010 01:49 AM  8 years agoPost 3
Justin Stuart (RIP)

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Plano, Texas

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What Honda generator are you using that puts out 30A?

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03-14-2010 03:46 AM  8 years agoPost 4
Tday

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Needham, MA

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Good call...it's the Honda EU20001 which runs at 2000W at 120V. That's all I get out of it. It has a 30A outlet for using with transfer switches, a 20A outlet which I use with my power supply. I wouldn't get 30A unless I connected it with a companion.

Nice set-up and super quiet as you know.

Tom

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03-14-2010 06:37 AM  8 years agoPost 5
HeliMan Dave

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Suburban Chicago

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Jerry,

It is interesting to see your charging results. I'm planning a set up similar to Tom's with either a 1000w or 2000w Yamaha generator. I had planned to get a a 24v 25A suppy for the 1000w OR 24v 40A supply for the 2000w gen. The charger will be the 1000w CellPro PL-8.

I was planning to charge my 6s 5000mAh packs at 4 or 5C while at the field. If there is really not much difference between 3, 4 or 5C I guess I'll be happy charging at 2C or maybe 3 as long as I can get a full charge in 20 minutes or so.

Also, I don't recall seeing a 20A outlet on the Honda 2000EU series. I was planning on connecting the power supply to the standard 7.5A (1000W) or the 13.5A (2000W) AC outlet.

Dave

Diabolo 700UL / Logo 700 / 600 / 500 V-Bar NEO / Oxy 2 / Blade 180CFX / mCPX BL / Nano / V-Control

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03-14-2010 07:13 AM  8 years agoPost 6
Justin Stuart (RIP)

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Plano, Texas

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I've been thinking of buying a Honda EU2000i generator so that I can charge 2x 6S 5000mAh packs at the field as quickly as possible, but I don't know if it that particular generator will put out enough amperage? According to the Honda website, the stats are 16.7A at full power, but you're apparently not supposed to run it at full power for more than a short time.

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03-14-2010 01:08 PM  8 years agoPost 7
Tday

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Needham, MA

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The 2000i has one of those 20a/15a outlets (and also the 30a twist on/off outlet.) Good thing about the 20a outlet since my 75a power supply has a 20a power cord. Justin--this thing is a big generator---that's 16a peak at 120v! 2000w is a lot but given the way chargers are going, I didn't want to find I outgrew the generator in a year or so.

The other thing it has going for it is the 30A connector which is able to connect to a transfer switch I installed at the house to power a refrige, the heater, and a few lights if the power drops. That, btw, is the "justification" for the generator purchase in the home budget. Nice! What it doesn't have is 12v output, but the generators only put out 90watts to the 12v circuit, so it is worthless for our field charging purposes.

Tom

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03-14-2010 07:49 PM  8 years agoPost 8
HeliMan Dave

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Suburban Chicago

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Tom,

I did see the outlets and they themselves are rated at 15/20A however as you mentioned, actual power out is 16.7 peak. At rated limit it's 1600W or 13.3A

Justin,

I'm looking to do the same thing. Problem is, 2000w doesn't appear to be enough to run TWO high output chargers (ie 1000w CellPro Power Lab 8) at full capacity (ie 6C). I think you would be fine running two chargers at 3C with the power dialed down though.

If I go with the 2000w Yamaha (same specs as Honda but is a little quieter and lighter weight), I plan to run (1) PL-8 (with parallel adapter) and/or (1) Hyperion Duo 3.

I just can't decide if I should get the even lighter weight 1000w Yamaha (only 28lbs) but then I will definitely not be able to use two chargers.

Diabolo 700UL / Logo 700 / 600 / 500 V-Bar NEO / Oxy 2 / Blade 180CFX / mCPX BL / Nano / V-Control

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03-14-2010 07:57 PM  8 years agoPost 9
Jerry K

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Houston Area

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but I don't know if it that particular generator will put out enough amperage?
Watts are watts! You are going to be connecting a charger to it rated at 250 to 360 watts plus efficency. I just saw the new cellpro that is about to be released that is ratted at 1000w. BUT you still need a power supply that can supply that kind of power.

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03-14-2010 08:05 PM  8 years agoPost 10
HeliMan Dave

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Suburban Chicago

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Jerry,

That is exactly right.

Justin,

here's what I'm planning to use if I get the 2000w gen. <http://www.iotaengineering.com/dls2740.htm>;

Not cheap, but neither is a 2000w Honda or Yamaha gen.

Ok, link doesn't work but it's the IOTA DLS-27-40

If I get the 1000w gen, the PS will be the DLS-27-25

Diabolo 700UL / Logo 700 / 600 / 500 V-Bar NEO / Oxy 2 / Blade 180CFX / mCPX BL / Nano / V-Control

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03-14-2010 08:17 PM  8 years agoPost 11
Jerry K

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Houston Area

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How much is the power supply going to cost

Jerry

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03-14-2010 08:24 PM  8 years agoPost 12
Justin Stuart (RIP)

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Plano, Texas

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So we all agree that a 2000W Honda or Yamaha generator will be the best choice for charging 2x 5000mAh 6s batteries at the field? I can't imagine buying something bigger than that.

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03-14-2010 09:02 PM  8 years agoPost 13
HeliMan Dave

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Suburban Chicago

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If I get the 40A, it's $365 If I go with the smaller setup, the 25A is $240.

http://www.thesolar.biz/IOTA_Battery_Chargers.htm

When I'm ready to purchase, I will be looking around a little for a lower price.

I have to decide which size gen I want first.

Justin,

For portability reasons (why we are getting these in the first place) I'd say yes, 2000w is the best choice. If you haven't priced the gens yet the 2000w ones go for between $800-1000

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03-14-2010 09:05 PM  8 years agoPost 14
Tday

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Needham, MA

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Yes, I think a 2000w generator is a good size.

As for the power supply I purchased the Iota 75a one.http://www.thesolar.biz/IOTA_Battery_Chargers.htm then ran a 4ga wire to a 200a rated terminal block and then ran 10ga wire to bind posts on a home made power panel to plug the chargers into.

I'm going to give CellPro a call and ask about balancing and connectors to their chargers. 1000w is very nice. Thanks for the tip.

Tom

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03-14-2010 09:22 PM  8 years agoPost 15
Jerry K

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Houston Area

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So let me get this straight ya'll want to charge your 5000 lipo's at 44a? What is the driving force wanting to charge at 3-4-5-6c? the difference between 3c and 6c is about 10 min.

If you only have 1 pack but with 2 packs that give's you a chance to drink something between flights

I have a 610 duo and a 720I and can fly all day long flying back to back charging at a respectable 2c rate trying not to kill my battery's

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03-14-2010 09:29 PM  8 years agoPost 16
Tday

rrKey Veteran

Needham, MA

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Maybe it makes sense, maybe not, but it puts electrics into the nitro convenience category in terms of "hey, it's nice out, I'm going to grab a few flights" and just go. By the time I get set-up, if I start the charger right off---I'm ready to go. Same with the next flight. And with one battery, I don't have 600 flights worth of battery inventory like I would with two of the new nano-chemistry batteries.

So that's the idea...call me crazy, but hey, that's helis for you.

Tom

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03-14-2010 09:35 PM  8 years agoPost 17
Jerry K

rrKey Veteran

Houston Area

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So we all agree that a 2000W Honda or Yamaha generator will be the best choice for charging 2x 5000mAh 6s batteries at the field? I can't imagine buying something bigger than that.
If that is all you want to charge is lipo batterys the Honda1000 is all you need. If you are going to share with someone else with the same requirments you will be marginal. You can run 2 Hyperion duo's at 360w each off a 45a {13.5 Vdc} PS powered by the Honda 1000. I run that setup when there is not power available.

Jerry

PS I agree the Honda200 is a better choice but it is more expensive, bigger and heavier.

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03-15-2010 03:32 AM  8 years agoPost 18
Dwight

rrApprentice

West Chicago, IL

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I am currently charging 2 6S 5000mah packs at 2C (10amps) with a Honda EU1000 and it works perfectly. It recharges the packs in 23 to 25 minutes.

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03-15-2010 05:13 AM  8 years agoPost 19
HeliMan Dave

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Suburban Chicago

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Hey Dwight! (F3C with Kyosho right?) Met you at St. Charles and Pratts Wayne last year.

I was hoping to charge one 6s 5000mAh pack at 5C or two 5000mAh packs simultaneously at 3C or 4C.

I'm not sure what charger you're using now but I'm getting the new CellPro Power Lab 8 1000w charger for the field. I currently have a CellPro 10s (260W) and Hyperion Duo 3 (180W per port). I'm planning on only using 5C charge capable packs this year.

After calculations, it looks like I could get up to 4.2C charge rate using the PL-8 with an EU1000i Honda.

If I want to add a charger however, that's what drops me down to 2C and right now my 1C charges take 60-65 min so I was assuming 30 minutes minimum at 2C. I'd like to get it down to 15-20 minutes charge time. That's why I'm considering the 2000w generator.

Diabolo 700UL / Logo 700 / 600 / 500 V-Bar NEO / Oxy 2 / Blade 180CFX / mCPX BL / Nano / V-Control

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03-15-2010 05:28 AM  8 years agoPost 20
Justin Stuart (RIP)

rrMaster

Plano, Texas

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The 2000W generator is about $1000.

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