Yes I did. I even reviewed the page history. The skepticism is still valid; however, the latest updates indicate a successfully documented 3rd-party trial of an actual product (a super capacitor with energy density similar to lead acid - orders of magnitude less than their original claim for a battery but still impressive for a capacitor) and so for perhaps the first time there is some actual "there there."did you read this section?
I did not feel like it was as short on details as previous EEStor stories. Here is what I read - whether it is true needs further verification, but it seems sufficient for a back of the napkin evaluation:problem here is they aren't giving useful information, which unfortunately is the telltale sign of a scam (how many people don't know the difference between volts and power and spend their lives believing in overunity?!?). Or perhaps the application isn't really a good fit for "EV News"? Even then if it can only handle low charge/discharge applications (resistance=heat), then self discharge might very well kill it.
There just isn't enough info to compare it even to an SLA, since no indication of power density or self discharge is present that I noticed. The resistance alone might make peukert effect look like your friend.
I guess presenting it as "EV News" is the main problem, they might be on to something for some applications, but that is terribly speculative.
Not difficult at all for any capacitor.The resistance thing means (I think) that it can discharge over a longer period of time, which if I understand correctly is difficult for a typical capacitor.
I did not know that - I always thought that capacitors MUST discharge almost all at once. That leaves me confused about what makes something a capacitor vs a battery?Not difficult at all for any capacitor.
A capacitor, any capacity, is either charge or discharged in 5 Time Constants. A Time Constant is just the number of seconds.
That could well be. I only brought this up because it seems they may actually salvage something from their research, which raises the possibility they were merely over-optimistic from the start. And of course it could be both - this is an imperfect world.Lastly EEstore has been a fraud form the start
I'm really not certain what your complaint is. Is it that I am not an expert on capacitors? Too bad. I brought this article up because it sounds like they may salvage something worthwhile from the research that they have done. The idea of a product with the "good" characteristics of a capacitor combined with the energy density of lead acid batteries sounds worthwhile, even if I'm not about to put my money into their company. If they can build it cheaply enough, they may well find a successful niche for it. I can easily see where rapidly responding "batteries" that can cycle over a million times could provide great value in grid leveling. If they are durable and never wear out and can be recharged in a few minutes, they might also be great for golf carts and riding mowers. Good products are good for everyone, even if they aren't the "silver bullet" for EVs.Phantom, I don't know why you are being so sloppy, but it isn't a good look.
The esr is in the kilo-ohm range and the capacitance is in the nano-farad range, indeed they even said the time constant is longer (partially because of the high resistance), why are you making something out of nothing?
how long would it take you to charge and discharge a 1nF cap a million times?!? Not long, even with that ESR.
this isn't newsworthy for this forum, in fact it is of dubious value in any forum. Plus it has a lot of red flags.I'm really not certain what your complaint is.
Ok, fair enough, this smells like a shit high ESR capacitor is all you need to know then. (and stationary doesn't *really* care about energy density, not like a vehicle).Is it that I am not an expert on capacitors? Too bad.
You got sloppy again, you just said you don't know caps, and are making a comparison to PB again (even after I posted a link to test results), then add this speculative crap about "good" and etc. Yes, a good capacitor is good, this apparently isn't one of those. If you don't know what you are talking about, why are you still talking?!? It is starting to smell like agenda in here.The idea of a product with the "good" characteristics of a capacitor combined with the energy density of lead acid batteries sounds worthwhile,
Can't hurt for fast reaction?You dont need rapid charge or discharge rates for grid storage/balancing.
I'm not certain that is true. Energy density is most certainly not needed - lots of open fields. Voltage depends, as previously pointed out, on the operating range of the controller. If narrow, it simply means some capacity is never used unless clever switching schemes are used to maintain voltage. Price, on the other hand, is most certainly paramount.What you do need though, is a fairly level voltage profile, good energy density and low cost.
Yes / no. If you can put it in an attic, size may be nearly irrelevant.Compact size would also be required for domestic storage (solar balance)
That is your opinion. You don't have to read things I post. I'd say 30% better performance for the same cost is newsworthy.this isn't newsworthy for this forum, in fact it is of dubious value in any forum. Plus it has a lot of red flags.
Really? Can you point to another form of capacitor that has the energy density of lead acid batteries? Last I heard, the best supercaps were on the order of 5-10% of lead acid energy density - which is why all of the folks here who are much more informed than either you or I are on these subjects always tell people to get more batteries rather than waste time with caps.You got sloppy again, you just said you don't know caps, and are making a comparison to PB again (even after I posted a link to test results), then add this speculative crap about "good" and etc. Yes, a good capacitor is good, this apparently isn't one of those.
That statement once again places you in violation of forum policies against trolling, which seems to be a habit with you. If you aren't interested, don't read about it.If you don't know what you are talking about, why are you still talking?!?