How many in each parallel group? How many in each series string? How many farads is each capacitor?
Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
- weber
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Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
One of the fathers of MeXy the electric MX-5, along with Coulomb and Newton (Jeff Owen).
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Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
I estimate about 90,000 Farads at 55 volts... That's a lot of capacitor.
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Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
For those interested to learn more about this super capacitor tech.....We have a live event in Doncaster in Melbourne next Wednesday, you can register here. Enthusiasts welcome. https://t.co/9SeBcDkbFl
Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
Hi EV enthusiasts, A few up and coming event where you can meet me, some of our Arvio team and see some awesome new super capacitor tech are:
Today at Moora Moora with Glen Morris if you are doing the battery training. He’s a great teacher if you haven’t met him yet.
Next Wednesday at Manningham Town Hall. https://www.facebook.com/ArvioHome/post ... 4231530197
Smart energy conference in Sydney https://t.co/7a6CKhhdZA
Come and find us at Arvio, be good to put faces to names and catchup. The harshest critics and experts are welcome too.
Today at Moora Moora with Glen Morris if you are doing the battery training. He’s a great teacher if you haven’t met him yet.
Next Wednesday at Manningham Town Hall. https://www.facebook.com/ArvioHome/post ... 4231530197
Smart energy conference in Sydney https://t.co/7a6CKhhdZA
Come and find us at Arvio, be good to put faces to names and catchup. The harshest critics and experts are welcome too.
Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
There are 1200 x 3,000F super capacitors. 2.7V each. 20 in series and 30 in parallel per layer x 2 layers.
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Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
That doesn't explain the sudden reading of 54 Volts (or thereabouts) when the short was removed.
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Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
Right, now we're getting somewhere. Maxwell supercapacitors are about the size of a drink can, whereas these are the size of an 18650 cell.
Do you have a spec sheet on these particular capacitors?
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Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
Yep my bad - I realised that later.
True - I offed it as a plausible possibility.
Perhaps there is a cap on the output smoothing the voltage
So the short answer is NO but the long answer is YES.
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Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
So the short answer is NO but the long answer is YES.
Help prevent road rage - get outta my way!
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Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
Halarious.
"Cap array" is right next to "battery array".
"such as an Lithium Iron Phosphate"...
And you ship these by air.
Oh dear.
"Cap array" is right next to "battery array".
"such as an Lithium Iron Phosphate"...
And you ship these by air.
Oh dear.
So the short answer is NO but the long answer is YES.
Help prevent road rage - get outta my way!
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Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
Hi Richo, let me know when you want to see the unit opened up on a work bench and see the cycle testing in person, touch and feel the capacitors in your hands. Run a column meter on them. Watch the charge and discharge tests, hold the current clamp in you own hand and make an informed decision about the outcome. Would love to meet our harshest critic face to face. Looking forward to seeing you when you are free.
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Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
Supercaps - would you care to elaborate on the "Battery Array" ?
"In some embodiments, a plurality of supercapacitors are connected in series to form, an array with a predetermined VDC (voltage direct-current) output. Each supercapacitor in the array can be embedded with a battery (such as an Lithium Iron Phosphate (“LFP”) battery) of an amount equivalent to a predetermined percentage of the storage capacity of the supercapacitor."AEVA National President, WA branch director.
Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
Yes the patent covers this. Patents are normally written as broadly as possible to prevent copying methods by other parties. This is why the words “in some embodiments” and “can” are used. There are no lithium ion electrochemical cells in the super capacitor modules which are being used. Good to see you doing your research. Have you worked out how it’s done yet?
Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
We have an engineer appointed to create a series of custom super capacitor batteries for various applications. If there are any EV enthusiasts who can see a good market for a particular package, let me know. We can build packs from 12V to 1000V.
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Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
So with 54 V at the terminals and a 20S configuration, each capacitor is seeing 54/20 = 2.70 V, right on their rated limit. So this assumes absolutely perfect sharing of 20 devices in series. There must be (or certainly should be) some serious electronics to ensure that sharing.
20S reduces the capacitance by 20x (i.e. the capacitance is multiplied by a factor of 1/20) . 1200/20 = 60 so they are 60P (30P in each layer); 60P increases the capacitance by 60x. So overall the capacitance is increased by (1/20) x 60 = 3x. So the total capacitance is 3000 F x 3 = 9000 F.
The energy stored in a capacitor is ½CV² = ½ x 9000 x (54²) = 13 122 000 J; divide by 3600 seconds per hour gives 3,645 Wh ~= 3.6 kWh, approximately as claimed. But that's the total energy in the capacitor, which can only be fully recovered by discharging to zero volts. Going down to only 44 V (assuming your equipment can handle that voltage range), you'll only get 1 - (44/54)² = 0.34 of this, as Weber has noted. So the usable capacity is 0.34 x 3.6 = 1.2 kWh. I think that claiming that this is a 3.5 kWh device (as per the title of this topic) is misleading. That's why we were assuming either a DC-DC converter, or a much larger capacitance.
[ Edit: = -> gives; uF -> F ]
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Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
That's looks like a PCB-mounting capacitor with radial leads that has had the manufacturer's shrink-wrap removed and a Kilowatt Labs sticker wrapped around it. The sticker isn't quite long enough so there's bare aluminium showing at both ends. I make it 18 mm dia by 67 mm long. So it can't be more than 200 F. Possibly only 100 F. Nowhere near the claimed 3000 F.
The figure of 3000 F is apparently concocted so that when you calculate ½CV² for 60P20S at 54 V you get approximately 3550 Wh. But that assumes it discharges to zero, not 44 V.
One of the fathers of MeXy the electric MX-5, along with Coulomb and Newton (Jeff Owen).
Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
Just to clarify a few things. The super capacitor in the picture is one of the range of super capacitors, not the one in the 3.55kWh unit. Secondly the calculations are correct except for the micro farad typo. The missing piece of the calculations is understanding of the technique used to extract almost all of the energy from the capacitors from 54VDC down to 44Vdc when in series without a series DC to DC converter. Yes there are electronics involved. The electronics perform high speed balancing between the parallel cell groups. This is the IP of the product. You can learn about this by reading the patent. The real test is at the terminals, which can easily be shown to deliver the energy stated. The unit can be shown opened up to anyone interested in person to have no electrochemical batteries and proven with a colomb meter to be what is stated. Still haven’t had anyone from this thread come to visit. Doors are always open. Nothing to hide.
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Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
Well I'm still going with scam
I'd have a(one) string of "supercaps" and the rest batteries.
But I would repackage them all so they looked the same.
An active cell balance to keep things happy and your done.
Go that right
Wrong state tho.
It wouldn't take me very long to find out with a dremel...
I'll let all the eggy goodness ooze out.
So the short answer is NO but the long answer is YES.
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Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
If you don't mind sharing some photos of what's inside the box we'd be most appreciative. Until then, West Australians like myself and Richo will have to speculate...Supercaps wrote: ↑Thu, 22 Mar 2018, 01:45 Just to clarify a few things. The super capacitor in the picture is one of the range of super capacitors, not the one in the 3.55kWh unit. Secondly the calculations are correct except for the micro farad typo. The missing piece of the calculations is understanding of the technique used to extract almost all of the energy from the capacitors from 54VDC down to 44Vdc when in series without a series DC to DC converter. Yes there are electronics involved. The electronics perform high speed balancing between the parallel cell groups. This is the IP of the product. You can learn about this by reading the patent. The real test is at the terminals, which can easily be shown to deliver the energy stated. The unit can be shown opened up to anyone interested in person to have no electrochemical batteries and proven with a colomb meter to be what is stated. Still haven’t had anyone from this thread come to visit. Doors are always open. Nothing to hide.
AEVA National President, WA branch director.
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Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
And that's what we appear to have here: UN3499 - double layer capacitors. Not supercapacitors.weber wrote: ↑Wed, 07 Mar 2018, 15:29
* A lithium-ion capacitor (not to be confused with a lithium-ion battery) is an example of a "double layer pseudocap hybrid". But the ones shown in the facebook photos are almost certainly not Li-ion capacitors, but like the Maxwells, ELDC capacitors using activated carbon.
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Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
Supercaps is the generic term.
So they are the same thing under UN3499.
If I get a battery, put a Capacitor sticker on it, shove it in a box, seal it - how would the shipping company know they aren't caps?
So they are the same thing under UN3499.
If I get a battery, put a Capacitor sticker on it, shove it in a box, seal it - how would the shipping company know they aren't caps?
So the short answer is NO but the long answer is YES.
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- weber
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Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
@Supercaps Do the supercaps in the 3550 Wh device have 3 terminals, like the one in Fig 9 of the patent application?
One of the fathers of MeXy the electric MX-5, along with Coulomb and Newton (Jeff Owen).
Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
No. The super capacitors in the 3.55kWh module have two terminals per capacitor. The one in the patent doesn’t have the physical terminals shown.
Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
https://youtu.be/8MgCrdyWYoM
Charge & discharge profile curve for supercapacitor module.
Charge & discharge profile curve for supercapacitor module.
- weber
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Re: Arvio 3.5kWh drop-in-battery-replacement supercapacitor on sale
@Supercaps. The things you post, strangely always fall short of doing anything that would actually distinguish between a supercap and a lithium-ion battery.
One of the fathers of MeXy the electric MX-5, along with Coulomb and Newton (Jeff Owen).