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Old Feb 05, 2014, 11:42 AM
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Charger Recommendation for Large 6S LiPos

I've been reading quite a bit about charging LiPos and I believe I have a fairly good understanding of the issues involved. What I'm looking for are some practical recommendations for the best solution to charge 16,000mah 6S LiPo packs using a standard 15A household circuit.

I do have a Mastech HY3050E power supply but my current charger is a Thunderpower TP820CD that has a LiPo capacity limit of 99,000mah. Assuming I am going to stay with my power supply and also assuming I'm willing to spend the money to get a quality charger, what would you mavens recommend as a good charger that can handle 16,000 6S packs?
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Old Feb 05, 2014, 11:47 AM
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Wow!

I use an icharger 4010 duo, but my needs are modest.
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Old Feb 05, 2014, 01:17 PM
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I'm a little lost as to why the charger with the 99Ah limit is a problem for 16Ah batteries - unless you are charging a bunch in parallel, but the FMA Powerlab 6, Powerlab 8, and Powerlab 8x2 are all possibilities. (The last would need more than 15A AC to run at full power. That may be true of the 4010 Duo as well.)
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Old Feb 05, 2014, 01:20 PM
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The biggest charger that I know of for charging a single pack would be the FMA Powerlab 8, it would max out close to its 1344 watt / 40 amp max with your current power supply. Your current charger is limited to 20 amps per port so that would theoretically half the charge time. Dont know what your are powering and what the lipo pack is that you are using but if you could switch to two 3S packs of same capacity you could use a high power dual charger like the icharger duo or the dual powerlab 8 to half the charge times again using 40 amps for each half of the pack at the same time. You might be able to do that with your current pack if you could creatively wire in new discharge and balance plugs to two 3S and then use a series connector to get the full 6S output.
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Old Feb 05, 2014, 01:20 PM
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Oh, and the ones that exceed your AC circuit are going to exceed your current PSU as well, but you might consider them anyway and increase the other components later on if needed.
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Old Feb 05, 2014, 01:24 PM
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Dave H. has good points anything above that ~40 amp charger is going to require a separate AC circuit and an additional power supply.
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Old Feb 05, 2014, 03:17 PM
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Humm are you wanting to charge 16,000 Lipo packs at once or a Lipo pack with 16ah (16,000mah) capacity?

Unless you are trying to really fast charge a battery pack, you don't need to use something like the iCharger 4010 Duo. For a long time I used a more simple charger to charge the packs at a more sedate 2.0 to 2.5 ampere rate. It just took an hour or so.

I do have several iCharger units a 3010, a 1010B and a 206B and those work well for me. I also have several other chargers too and they would work OK as well. But there are quite a few other chargers that would all work well too, the Hyperion and FMA chargers come to mind too. Your Thunderpower TP820CD charger would work fine too.

Unless you plan on charging using 220v AC trying to charge at the 30 amp or 40 amp rates is not going to happen. 110vac circuits won't allow you to. So a charger than can charge at up to 10 or 20 amps would work perfectly fine for most purposes.

One merely needs to plan ahead of course for charging packs so you don't wind up waiting too long for that first flight or two.

If I understand it right, the Thunderpower TP820CD charger is rated at 20 amps max charge rate for each of its dual ports, or 40 amps total. But with a 12v power supply you won't be able to reach that. With 24v you could though, but it still depends on the 110vac circuit capability though.
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Last edited by earlwb; Feb 05, 2014 at 03:27 PM. Reason: typo correction
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Old Feb 05, 2014, 04:36 PM
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A standard 110VAC outlet maxes at about 1650watts. (110V x 15A)
Your Mastech power supply maxes at 1500watts. (30V x 50A)
A PL8 with a 30V input, charging a 6S at 40A will output 1008 watts. (25.2V x 40A)
A PL6 will produce the same results.

If there is nothing else on the household circuit there is no problem.

Ref: http://www.revolectrix.com/PL8_calculators_Main.htm
Ref: http://www.revolectrix.com/PL6_calculators_Main.htm

A 6S 16000mah battery charged at 1C requires 403 watts so a PL8 or PL6 should be able to charge at 2.5C.

Glen
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Old Feb 05, 2014, 11:37 PM
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Thanks so very much for this very helpful info, guys. ...

Earlwb, with regard to your comment that my Thunderpower TP820CD would work, perhaps I don't understand my settings. When I set up a memory location for a particular LiPo pack it allows me to set the mah capacity but that setting only goes up to 9,900. If I put a 16,000mah on the charger and have the capacity all the way up to the 9,900 won't it stop charging when it gets to 9,900?

Thanks for taking time to educate me. Really appreciate it.
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Old Feb 06, 2014, 06:11 AM
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Originally Posted by javaboy View Post
Thanks so very much for this very helpful info, guys. ...

Earlwb, with regard to your comment that my Thunderpower TP820CD would work, perhaps I don't understand my settings. When I set up a memory location for a particular LiPo pack it allows me to set the mah capacity but that setting only goes up to 9,900. If I put a 16,000mah on the charger and have the capacity all the way up to the 9,900 won't it stop charging when it gets to 9,900?

Thanks for taking time to educate me. Really appreciate it.
I am not familiar with that particular charger. However I can say that even if the charger does stop when 9900 mah has been returned to the pack all you would have to do is restart the charge and it will complete the charge.

However if you still have concerns about the ability of your charger to do the job I also recommend the PowerLab 6 or 8.

My curiosity makes me ask just which batteries you are using. Could you please post a link to them?

Glen
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Old Feb 06, 2014, 07:02 AM
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Originally Posted by javaboy View Post
Thanks so very much for this very helpful info, guys. ...
Earlwb, with regard to your comment that my Thunderpower TP820CD would work, perhaps I don't understand my settings. When I set up a memory location for a particular LiPo pack it allows me to set the mah capacity but that setting only goes up to 9,900. If I put a 16,000mah on the charger and have the capacity all the way up to the 9,900 won't it stop charging when it gets to 9,900?
Thanks for taking time to educate me. Really appreciate it.
I looked up the instruction manual for the TP820cd charger and it does have a capacity setting. They don't say what disables that setting either. So at the time the charger was designed 9900 mah was the largest battery pack they expected someone to get. It looks like a nice safety feature for most Lipo packs.

Yes like ggcrandall1 stated, if it stops charging at 9900 then just restart the charge process and it should complete the charge then with the 16000 mah pack. My chargers don't have that capacity feature and they charge until the battery peaks out.
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Last edited by earlwb; Feb 06, 2014 at 07:04 AM. Reason: typo correction
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Old Feb 06, 2014, 09:28 AM
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PowerLab 6, 8, or Dual PowerLab 8x2 are the only chargers I recommend.
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Old Feb 06, 2014, 07:50 PM
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...
My curiosity makes me ask just which batteries you are using. Could you please post a link to them?

Glen
Here's the batteries: http://www.anythingheli.com/pulse-ul...-22-2v-15c-6s/
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Old Feb 06, 2014, 08:09 PM
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Those are pretty impressive battery packs. Do you have them already and are using them?
I was wondering if a 15C rated pack, even if it is a 16,000 mah battery can provide enough current to run your aircraft or not. 15C seems a bit weak if that is a fairly large plane you are flying. Thus why I ask the question.
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Old Feb 06, 2014, 11:26 PM
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Originally Posted by javaboy View Post
Thanks so very much for this very helpful info, guys. ...

Earlwb, with regard to your comment that my Thunderpower TP820CD would work, perhaps I don't understand my settings. When I set up a memory location for a particular LiPo pack it allows me to set the mah capacity but that setting only goes up to 9,900. If I put a 16,000mah on the charger and have the capacity all the way up to the 9,900 won't it stop charging when it gets to 9,900?

Thanks for taking time to educate me. Really appreciate it.
If the packs are charging from storage, (3.85v per cell, 50% charge), then ~8,000mah would be the amount of charge to 100%.
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