Hyperion G3 lipos - just ordered!

[Tail boom]

Originally Posted by Atomsk

It is a new generation of lipo packs apparently. This is what Hyperion claims anyhow. They are literally HOT off the assembly line - this is the first round of stock in the stores.

There is a post on the main forums about them. I want these ore the XPS lipos but nobody has tested these new Hyperion ones yet.

Hi,

Just did it, I have ordered two of these:

HYPERION G3 CX 22.2V 6S 2500 MAH 25C/45C LIPOLY PACK

I talked with Bob at AlleRC.com, and he said they pumped them at 5C and they did not get warm and were ready in 10-15 min! According to Bob, they are manufactured in Korea.

They come with the Hyperion balancing tabs, which are compatible to the PolyQuest tabs.

My current Cellpro 10S adapter boards feature ThunderPower and Hyperion connectors, bingo!

Cannot wait to check them out!

P.S.: They seem to be 1cm higher than regular packs, but they are shorter. The Hyperion dimensions are:

111 x 36.5 x 55 mm

Comparable Outrage pack dimensions are:
132 x 36 x 45 mm

Hope the Hyperions will fit under the Protos canopy.

Thanks for the tip!

Frank

[simmer]

Hi,
I called this place and left my number. They called me back! I talked to him about the 5C and safe charge etc. Indeed they are saying 5C is safe and no heat built up. You might need a more powerful charger to do 5C charge rate but they will withstand this and not degrade the longevity of the pack.

Was about 15 minutes ago he only had 3 6S batteries (2500mah) in stock. I ordered one, so there are only two left. These are new and as mentioned to me by the vendor only in the states for a few weeks (3)

I will charge these at 3 maybe 4 and see how it goes. Even 3x rate is a great thing. We are talking 12 minutes at 5C! Excited to see how they make out. With my current packs, I can fly this one first then the other 4 and have this one ready to make 5 flights per session, It seems if these are up to the teask, two or three would be all you need, as long as you have a charger you can use at the field that will not kill your car starting. (Deepcycle AGM battery just for chargeing)

[Tail boom]

Well, I have just ordered two more.

So total of four for me, and one for Simmer

What a ride!

[wespen]

There will be a review in new Heli Sta Mag in like one week.
Got a few coiming in to test.

Wesp

[OnTheSnap]

I wonder if this is a Hyperion exclusive, or if it'll start to trickle out to other LiPo vendors. A little competition would be nice to get the prices down. I realize that with a 4x life these are dirt cheap compared to conventional LiPo's, but this is just marketing at this point. Is it 4x a Zippy? Or some low benchmark making it up to 4x?

It would be nice if they actually provided a prediction of the max number of cycles the pack is rated for instead of an ambiguous "4x" rating.

[vicrc]

Ordered one, I am gonna Eagletree it and compare them to a fresh zippy. Yes I will definitely try them at 20 min charge

[kgfly]

5C charge rate on a 2500 pack is 12.5A so these new packs will increase the demand for high-power chargers rated for 20A instead of the more common 10A limit. Luckily, the options on that front are expanding. The Hyperion EOS0720iNET (7S, 250W/20A) has been available for some months now and the new iCharger 208B (8S, 350W/20A) is due out soon.

Now LiPo users have an option to enjoy (almost) as fast charge times as A123 users have had for a couple of years

[simmer]

Very true Kgfly, One of the best things you can buy is a separate power supply 15 or better 20 amp available at Radio shack or online. I have seen these (from 50 to 80 dollars)but they will proviude the power to charge properly.

[vicrc]

This is great news for the EP helis! This will surely lower the prices on other brands.

[Gscott]

Wasn't there testing done a year or so ago that showed a big jump going from 1c to 2c but only incremental decrease in charge time at 3c or more? I seem to recall a good portion of a lipo's charge time is done in the final stage and increasing the charge rate doesn't change that.

[Tail boom]

Originally Posted by Gscott

Wasn't there testing done a year or so ago that showed a big jump going from 1c to 2c but only incremental decrease in charge time at 3c or more? I seem to recall a good portion of a lipo's charge time is done in the final stage and increasing the charge rate doesn't change that.

Hi,

You are right in that the balancing portion at the end of the charge cycle takes overproportionally long. This is called the CV charge phase (Constant Voltage, i.e. 4.20V).

However, reducing the CC (Constant Current) charge phase at the beginning, when you pump up the battery from approx. 20% charge state to approx. 95%-99% charge state, that is when you can speed up things.

Also, some guys do not balance every time, so they pump CC into the pack until it reaches approx. 4.20V/cell.

Makes sense?

Best,
Frank

[simmer]

Yes GScott, the trick as expained to me Friday by the manufacturer is to charge to 98 99% as opposed to 100% I have the 610 Hyperion charger and was told it charges on the conservative side anyway.

[OICU812]

Guys your best investment is buying a "IOTA" engineering power convertor. Many sold on Ebay and other sites, they are awesome and I snagged my last one for 150, it is a 75amper! I can use (4) TP1010s all at 6amps each with zero issues, they are fantastic.

[simmer]

25 amp 19.95

http://www.digitalfotoclub.com/sc/fr...fdate=4_8_2009


Thats pretty cheap, there must be something wrong with this? I would expe cte to pay 50 plus easy for a 25 amp PS

69.00 at radio shack

http://www.radioshack.com/product/in...ductId=2103961


Edit SORRY this is a 2.5 amp not 25 amp. That does make sense now.

[fwilly]

On all my chargers, the constant voltage part of a lipo charge cycle happens whether you balance or not. The problem with using a constant current charge until the cells are at 4.2v is that, somewhere around 80% capacity, you will have to charge at more than 4.2v/cell to get a current greater or equal to 1c. To do this, the charger would have to stop charging, and check the resting voltage, every so often, and I don't think there are any that can do that yet, or if its even safe.


The reason that balancing takes a little longer to charge (atleast on the chargers I have observed), is that the balancing is done by discharging the high cell.

Originally Posted by Tail boom

Hi,

You are right in that the balancing portion at the end of the charge cycle takes overproportionally long. This is called the CV charge phase (Constant Voltage, i.e. 4.20V).

However, reducing the CC (Constant Current) charge phase at the beginning, when you pump up the battery from approx. 20% charge state to approx. 95%-99% charge state, that is when you can speed up things.

Also, some guys do not balance every time, so they pump CC into the pack until it reaches approx. 4.20V/cell.

Makes sense?

Best,
Frank

[kgfly]

At 13.4V the IOTA 55 is still too low a voltage to be able to get the full rated output from most high-power (>250W) chargers, especially the new ones (>300W).

It all depends what your needs turn out to be. If you want to run multiple chargers at 12-14V at under 250W output each then there are quite a few good options around for 40A-60A supplies. If you want to run a 250-500W charger at full output, you have to seek out a higher voltage DC supply with 20-25A.From some initial looking around, the next most common voltages after 13.8V are 15V and 24V. For example the Iota DLS-27-25 (24-28V, 25A).

Simmer - Reread the spec.s and you will see that the 19.95 PS is 2.5A not 25A !

[fwilly]

I wonder if these cells could take a full constant voltage charge, like zip charging a 3 cell A123.

[kgfly]

...To do this, the charger would have to stop charging, and check the resting voltage, every so often, and I don't think there are any that can do that yet, or if its even safe....

There are quite a few that do exactly that. For example the Hyperion EOS chargers operate that way. In LiXx mode they charge for about 1 minute then stop to monitor the resting voltage for a few seconds then charge again. You can clearly see that behaviour in any charge logs from those units.

[vicrc]

You can put 3 PC power supply together, series the 5V tap to get 15V output for your chargers. Reduce voltage with diodes if you need to. 300x3 = 900 watt super power supply. 30Amps!

here is a nice thread...

http://www.qsl.net/i0jx/pcsupply.html

Try at yer own risk, don't shock and kill yourself and haunt me.

[kgfly]

Here is an example of a 5C charge cycle on a G3 pack, illustrating both the relationship between CC and CV phases and the charge-and-stop-to-sense behaviour of the charger

The original can be found here: http://www.rc-unionen.dk/nytforum/to...15&whichpage=1 OR in English here:
http://translate.google.com/translat...D1&sl=da&tl=en

You can see that about 2/3 of the time was spent in the CC phase to deliver about 85% of the charge, then about 1/3 in the CV phase to finish off. Presumably at a 1C charge rate the CC phase might have lasted 5 times as long so there does appear to be a real benefit for these cells to charge at 5C.