RunRyder - Best BIG LIPO charger

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e-Electric Batteries & Chargers > Best BIG LIPO charger

fergus
Veteran
Location: Ireland

Quote

Quote
What method do you use to decide when to end the charge process without exposing the lipos to excessive current or just 'feeding' the balancer?

Not sure what you mean there? Mastech 5020E is a CC/CV unit, as soon as it reaches target voltage it switches over to "Constant Voltage" stage, voltage wont go passed the target, Current start to lower itself, just like the normal off the shelf charges does.

As I understood it on the Mastech the current will not drop to zero during the CV phase of charging. In other words the Mastech will not terminate charging like a regular charger but will continue at a low rate which could cause damage to lipos. Perhaps your inline balancer is terminating the charge when the pack is full! That is why I use a stopwatch to return to the Mastech and disconnect the pack when the current has dropped below about 2amps.

I have noticed that when current drops to about 1c the balancers I am using become very active as if trying to prevent overcharging even though voltage was set correctly at the start of the process.

Regards

Fergus

Regards

Fergus

05-23-2008 12:25 PM

MrMel
Elite Veteran
Location: Lidingo, Sweden

Quote

Min drops to zero current, no overcharging ever.

But if it did the balancer would surely cut it when before it reaches too high level.

05-23-2008 12:27 PM

fergus
Veteran
Location: Ireland

Good to know Mel thanks.

Regards

Fergus

Regards

Fergus

05-23-2008 03:04 PM

MrMel
Elite Veteran
Location: Lidingo, Sweden

Hehe,
I can really confirm it since I just realized I had put a A123 cell on there and let it stayed connected for 4 days now, no overcharge.

05-23-2008 03:06 PM

fergus
Veteran
Location: Ireland

My balancers are not inline so thinking about it maybe the reason mine does not drop to zero is that the Mastech keeps 'feeding' the balancers and not the battery pack. That would explain the extra balancing activity at the end of the charge cycle.

Regards

Fergus

Regards

Fergus

05-23-2008 03:10 PM

MrMel
Elite Veteran
Location: Lidingo, Sweden

I dont use balancer inline for A123, so statement above is without balancer.

But yes, if you have a "drain" version of balancer, if it balances, mastech probably feed new power into the cells.

05-23-2008 03:11 PM

bartwaw
Heliman
Location: Zabrze, Poland

Hi,
but what will you say about 350W.
It's made here in Poland.

http://www.pp-rc.de/SHOP/pulsar2p.htm

and probably next year - Pulsar 3 with 500W.

Freya(OS91C-Spec)PCM9XvII. T-600E

07-28-2008 08:16 PM

Ace Dude
Elite Veteran
Location: USA

With the value of the US Dollar they won't be selling very many in the USA.

07-29-2008 01:47 AM

"Cam"
Veteran
Location: Japan

I know of a charger that does 360W, or two you can sync together for 500W.

They use ‘drain’ balances (if you want to call them that - it’s all electronically the same - we’re dealing with voltage not water in pipes).

Fergus what you described with the stop watch is similar to using the TCS function - by terminating the charge before the charge rate drops below 1C, you are stopping the charge before it switches over from CC to CV. The constant output voltage is when the amp rate slows down.

Neither do the balancers become over active because everything is linked together with a processor.

In practice you are not going to find a charger that can give 333 Watts output on a single port from a 12V supply. That’s pricey electronics. (333W = 6S, 5000mAh x 15Amps, being 3C)

The DUO can do 7.75Amps on that pack from a 15.5V supply and is rated at upto 28Volts DC input.

07-29-2008 01:53 AM

Drkhorse0646
Heliman
Location: Norfolk, Va - USA

I read through this whole thing. I am looking for something to do 8 cell packs as well. So all said and done what chrger gives the best bang for the buck? I found this iMax B8 any thoughts out there on this one.

B400 500T ds3400G

07-29-2008 06:49 AM

Ace Dude
Elite Veteran
Location: USA

For 8 cells packs the TP-1010C is probably your best bet. It has a max output of 220W.

07-29-2008 12:18 PM

ROne21
Heliman
Location: Chicago, IL USA

That DUO looks nice and seems very functional too. How is the quality? Is it mostly plastic or metal like the BC6? If it's comparable to BC6 built wise, I might just pick one up.

08-05-2008 07:03 AM

Al Austria
Key Veteran
Location: Gainesville, FL

I LOVE my Hyperion EOS0610i NET(single output version of the DUO). The case is metal and plastic but of excellent quality and the integrated balancer works extremely well. It's definitely not the most user friendly charger, but once you get used to it, it is very versatile. Power is also a generous 250 watts. I can charge a 5S A123 pack in about 10 minutes(4.3C charge rate) and a 5000 6s pack in about 35(2C charge rate).

The BC6 is a nice charger with a built in PSU, but it's output is limited to 50 watts, so 2C charging with larger packs is out of the question. The new BC-610 looks like a great charger and is capable of 200 watts as well as discharging(the EOS0610i NET isn't capable of discharging). My friend just bought a BC-610 and if it were available when I bought my NET, I STILL would have bought the NET!