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Scorpion Power AlignRC
heliraptor10

Key Veteran

kokomo, in-US

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I'll believe it when I see it
http://www.iflscience.com/technolog...-half-the-size/

Goblin! where have you been all my life?

08-22-2016 10:27 PM
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JuanRodriguez

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The Villages, Florida

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I don't believe that lithium ion batteries have the discharge qualities suited for our electric heli needs.....

But I could be wrong.....

Been there, done that and old enough to know better.....

08-22-2016 11:06 PM
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heliraptor10

Key Veteran

kokomo, in-US

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They say they are making them for "drones" later this year.

I know they sometimes require a lower discharge rate.

Goblin! where have you been all my life?

08-23-2016 12:58 AM
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Gearhead

rrMaster

Vt

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boy is that guy going to be rich

Jim
Buzz Buzz Buzz

08-23-2016 02:31 AM
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AirWolfRC

rrProfessor

42½ N, 83½ W

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Energy density and discharge rate are two separate characteristics and have little affect on each other. What I usually see is you can tweak one at the expense of the other.

If you want high discharge rates, you need thicker electrodes to handle the current and this guy is talking ultra thin foil electrodes.

Most "drone" applications are going to want longer flight times than 5-10 minutes which means lower discharge rates.

08-26-2016 12:34 AM
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icanfly

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ontario

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anyone can say what they want to eschew all the new ideas and iterations of a age old e storage format, a new company in Canada has similar aspirations and tech. It's an ever evolving field of interest.

When you want to say energy density and discharge/charge ratings have something to do with applicability I'm not so sure the two are intrinsically yoked in so far they dictate use as 3d capable or not. The anode portion of a lipo is carbon and 20% thicker than the Lithium considered regardless of change to flow rates. It doesn't matter what the anode is made of as long as the resistance is low, take Turnigy nano's for example as an example of efficient use of the anode material. It doesn't matter how much e is stored on the lithium cathode, it matters what level of resistance is in the material acting as the anode, is all.

You couldn't afford lithium batteries if it were made to 2 minute charging times and 200amp discharge, and it would probably be labeled by gov's as illegal due to it's potential use in nefarious activities, like drones lol.

Here's a short well written article on the subject currently of interest, http://www.doitpoms.ac.uk/tlplib/ba...ies_lithium.php read to a little after half way through the article and it starts talking of the latest bend on li battery progress pointed out in this topic.

08-26-2016 01:06 PM
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heliraptor10

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kokomo, in-US

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These PIL batteries are supposed to be available for drones by November.

Even if they are only 20c (a common rate for drone applications) then 2 of them in parallel is 40c.

Now of course if they are already doubling them up to get the discharge up to 20c then by the time you add all the wires and extra packaging to end up at the target voltage and discharge rate, the milliamp hours you get for your weight won't be double.

But I'm still interested to see.
I'm hoping you'll be able to order individual cells.

Goblin! where have you been all my life?

08-31-2016 03:44 AM
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Nashville

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Formerly Music City now back home in Sunny Florida

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I've been flying electrics since the first Trex 600 came out. Batteries haven't really changed that much. Yes, some extra c's her and a few more mah's there but I know we've all been thinking that in these past ten years or so we'd be so much further ahead. We can continue to dream of 20-30 minute 3d flights on an 800 sized heli.

I was Spektrum when Spektrum wasn't cool

09-09-2016 04:35 PM
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AirWolfRC

rrProfessor

42½ N, 83½ W

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20 to 30 minute flights on a pack are not the problem. That long a flight keeps the max C rating needs lower. It's the 6 minute flights that use up the whole pack that are the problem . . . regardless of heli size.

09-09-2016 04:48 PM
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Richardmid1

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Leeds, England

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. Even if they are only 20c (a common rate for drone applications) then 2 of them in parallel is 40c.
Will still be 20C you have just double the capacity.

60% of the time, it works every time!

09-09-2016 05:11 PM
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heliraptor10

Key Veteran

kokomo, in-US

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The c rating factors on capacity.

Doubling batteries in parallel means a higher discharge capability.

Goblin! where have you been all my life?

09-09-2016 05:23 PM
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Richardmid1

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Leeds, England

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Yes but still 20C.

60% of the time, it works every time!

09-09-2016 05:28 PM
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heliraptor10

Key Veteran

kokomo, in-US

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Ok I can look it up or you can.

A 1 cell lipo with 2000mah can deliver 20 amps at 10c to the esc

Or 2 of the same 1 cell batteries hooked up in parallel will deliver the same voltage with each one capable of putting out 20 amps so the esc can pull 40 and drain them faster or pull at 20 for roughly twice as long.

But we're talking about a whole new tech.
So If they are as good as we hope then 1 of their 4000mah at 10c would deliver the 40 amps of the 2 cells and weigh the same as one cell.

And 2 of them would be 80 amps.

Goblin! where have you been all my life?

09-09-2016 06:08 PM
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LaDon

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Fort Dodge .Ia

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Oh no ⛈ clouds are brewing

Team Jr

09-09-2016 06:22 PM
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heliraptor10

Key Veteran

kokomo, in-US

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The only reason I'm excited is because of the modest claim of 2x.

Goblin! where have you been all my life?

09-09-2016 06:32 PM
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Richardmid1

rrProfessor

Leeds, England

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Yes you have doubled the capacity of which you can still only discharge 20x the Ah of.

So two 2000mah packs in parallel become one 4000mah pack but still 20C discharge capable. Yes that's twice the amps but we still say 20C not 40C.

60% of the time, it works every time!

09-09-2016 07:49 PM
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heliraptor10

Key Veteran

kokomo, in-US

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http://batteryuniversity.com/learn/..._configurations

Goblin! where have you been all my life?

09-09-2016 08:16 PM
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LaDon

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Fort Dodge .Ia

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Oh no

Team Jr

09-09-2016 08:22 PM
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heliraptor10

Key Veteran

kokomo, in-US

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Goblin! where have you been all my life?

09-09-2016 08:38 PM
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heliraptor10

Key Veteran

kokomo, in-US

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It's like the water pump metaphor.
With 2 batteries in parallel
That is twice the reservoir, twice the pumps and twice the pipes.

So because the battery is both pump and reservoir, with 2 then you double the rate that they can be safely discharged.

Goblin! where have you been all my life?

09-09-2016 08:50 PM
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