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Old Apr 07, 2009, 06:30 PM
ProgressiveRC
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Seattle, WA
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...and so the cat is out

Nice digging there Locitur, and one sweet little 350W machine!

- David
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Old Apr 07, 2009, 06:45 PM
Occasional Flyer
Iowa
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Wow that will be nice. Hopefully not as expensive as the Hyperion. Do these chargers really only allow you to charge a lipo at 1C and A123 at 4C (page 8)? I would rather not have to lie to the charger about my battery's capacity and lose one layer of safety.
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Old Apr 07, 2009, 07:02 PM
ProgressiveRC
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Nope, lying not required. Just set charge rate and go.

And if you are referring to the Hyperion 720i, I believe it is max. 7S (vs. 8S balancing on the new iCharger and up to 10S A123 without balancing), max. 18 NiXX (vs. 25 on iCharger), accepts input down to 11V (vs. down to 4.5V on the 208B), 250W max. (vs. 350W for iCharger = 40% more power!), lacks on board charge logging to memory, per cell IR readings, external discharge control to 600W, etc. + the iCharger comes in a nice little package that is less than half the size!

So, they are really in a slightly different class, but with that having been said, I believe you will find the price will compare favorably against the "competition" as has historically been the case with these powerful and compact chargers.

- David
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Old Apr 07, 2009, 07:16 PM
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Montreal
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Can Julez or someone else confirm me(it should, but maybe I 'm missing something) that I can use multiple ICharger 1010B+ in series to charge a 30 cell (30S8P) A123 pack with 3 ICharger 1010B+, each ICharger will get is own Mean Well 300Watt 15 volt 20Amp power supply with no common ground between them (this is the most important thing)

Any reason for this not to work perfectly and act like 3 different 10S8P pack all attach to their own 1010B+?

I have bought the charger allready....I'm waiting for shipping now

I can separate the pack...but I need to know if this will work, because I will also use these 3 charger to charge my Ebike (24S4P Lipo for a total pack 88.8V and 20A/hrs) the lipo on the Ebike will be hard to break into 10S insulated from the other 10S and other 4S left while charging....

Please clear my mind...otherwise I will have nightmare until I get the charger and actually test it

Robin
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Old Apr 07, 2009, 09:58 PM
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Melbourne, Australia
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I have no doubt that the 208B will define a new price/performance point in the market, like the 106B(+) and 1010B(+) before it. The specifications are *very* impressive IMO. It has all the goodies of its siblings and more. The on-board data logging is yet another step up in value where Junsi have listened closely to the users and responded positively. The wide input voltage range enhances the flexibility and enables the very high maximum power capability. All this in one of the most compact chargers on the market. Well done Junsi!
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Old Apr 07, 2009, 10:25 PM
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Yes I will be getting one of those, between that charger and my current 1010b+ I i will be able to do some really seriouse charging of lipo and a123 packs. I cant wait for this to come out. Hopefully the price doesnt break it.

CJG
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Old Apr 07, 2009, 10:50 PM
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Looks like the 208B just may be the new king-of-the-hill in high power value oriented chargers. If priced competitively, it may dethrone the Hyperion 0720i for power junkies.

Would be interested to know what input voltage is required to get max 350 watt output...
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Old Apr 07, 2009, 10:58 PM
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So. Cal.
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Quote:
Originally Posted by Almasi
Can Julez or someone else confirm me(it should, but maybe I 'm missing something) that I can use multiple ICharger 1010B+ in series to charge a 30 cell (30S8P) A123 pack with 3 ICharger 1010B+, each ICharger will get is own Mean Well 300Watt 15 volt 20Amp power supply with no common ground between them (this is the most important thing)

Any reason for this not to work perfectly and act like 3 different 10S8P pack all attach to their own 1010B+?

I have bought the charger allready....I'm waiting for shipping now

I can separate the pack...but I need to know if this will work, because I will also use these 3 charger to charge my Ebike (24S4P Lipo for a total pack 88.8V and 20A/hrs) the lipo on the Ebike will be hard to break into 10S insulated from the other 10S and other 4S left while charging....

Please clear my mind...otherwise I will have nightmare until I get the charger and actually test it

Robin
Be very careful with attempting this. Most well-designed power supplies tie the DC return to the ground on the AC input. As such, the DC returns will not be isolated and will short out your pack and wreak instant havoc.

You'll want to buzz it out and triple check before connecting to your packs. High voltage DC can be extremely hazardous.

Mark
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Old Apr 07, 2009, 11:08 PM
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Melbourne, Australia
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Quote:
Originally Posted by mrforsyth
Would be interested to know what input voltage is required to get max 350 watt output...
Quote:
Input voltage range:
4.5 - 32.0VDC

Maximum charge power capacity:
350W @ input voltage > 18V
It was listed in the specifications above and on the web page that was linked to, 18V is the answer Junsi have always been very honest with their specifications, clearly stating any limitations right up front.

You can often estimate it for most high-power chargers since they all seem to be limited on the input side to 23-24A and by assuming around 80% efficiency.
Vin_for_max_output = Pmax / (0.8 x 24)
and the corollary to estimate max output power for a given input voltage:
Pmaxout = 0.8 x 24 x Vin
So I would estimate that the 208B can output about 230W from a 12V source
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Old Apr 07, 2009, 11:12 PM
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Excellent. I missed that. And I'm usually very thorough in my research before posting.

Thanks for the clarification!

Mark
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Old Apr 08, 2009, 12:32 AM
ProgressiveRC
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Slight additional clarification: 25A is the max. input current given in the manual.
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Old Apr 08, 2009, 12:33 AM
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Montreal
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Quote:
Originally Posted by mrforsyth
Be very careful with attempting this. Most well-designed power supplies tie the DC return to the ground on the AC input. As such, the DC returns will not be isolated and will short out your pack and wreak instant havoc.

Mark

Thanks Mark!

I will make sure that they don't have common ground (if they do what you said...I will find the junction and take care of it )

I will try to see if they share that GND before connecting it to ICharger

Robin
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Old Apr 08, 2009, 05:07 AM
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Did you see the packs discussed in http://www.rcgroups.com/forums/showthread.php?t=1029818 ?

They are from Hyperion and can be charged at 5C

Can the iCharger 1010B+ charge them at 5C?
What would be the largest (what S) that will be able to charge at 5C?
How much time will it take if need to do Balance charge? (since these are Lipos I assume Balance charge is needed)
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Old Apr 08, 2009, 08:24 AM
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So I didn't get an answer to my question about the data save so I tried it out myself. The charger does not tie setup numbers to the memory settings, only amp rating and cell number. I'll have to manually change those settings.

It would be extrememly useful to have settings such as max capacity and the safety timer be tied to memory locations since these numbers would or should change depending on what type/size of bettery you are charging.
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Old Apr 08, 2009, 08:28 AM
Vintage Flyer
Treasure Island, FL
Joined Jan 2002
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Quote:
Originally Posted by mrforsyth
Be very careful with attempting this. Most well-designed power supplies tie the DC return to the ground on the AC input.

Mark
That would actually be one very poorly designed power supply and probably would not pass muster at the UL.
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