2000 F, credic card super capacitor? - Page 1
Forum section: electronics / general

author: rzeznicc
author_rank: Contributor
timestamp: September 04, 2015, 09:22:39 am
content: hey everybody!I came across this video by Robert Murray-Smith :he shows the Super Capacitor "EESD" rated at 2 000 Farads in a tiny package,where compared to, for example, Maxwellhttp://www.maxwell.com/images/documents/Product_Comparison_Matrix_3000489_2.pdfwhich have much worse power density.Is it legitimate?

author: Psi
author_rank: Super Contributor
timestamp: September 04, 2015, 09:37:19 am
content: Assuming its a 3v supercapAssuming the motor will spin down to maybe 1VSo that's 2V of usable range4 hours is 240minutes or 14400sec2V / 14400sec = 0.138mV per secondsocapacity = I/change in voltage0.120A / 0.000138V = 864 faradsThats really quick and dirty and doesnt count for the fact that the motor will draw much less at 1V than 3V.so 2000F is probably not that far off.Getting 2000F at 3V from something that size is an order of magnitude better than your typical maxwell boost cap. So i really hope its true, but i doubt it.He doesn't have that typical "feel" of someone trying to sell a free energy device.More like a legit engineer. So that's promising.

author: rzeznicc
author_rank: Contributor
timestamp: September 04, 2015, 09:56:57 am
content: well, he seems to be legitimate as far as first page of google goes:his previous IGG campain:https://www.indiegogo.com/projects/conductive-ink#/story"Sunvault Energy Adds Robert Murray-Smith PHD to its Board of Directors"http://www.marketwired.com/press-release/sunvault-energy-adds-robert-murray-smith-phd-to-its-board-of-directors-otcqb-svlt-2025367.htm

author: bktemp
author_rank: Super Contributor
timestamp: September 04, 2015, 10:19:47 am
content: A hybrid capacitor has a much higer energy density than a normal double layer capacitor:https://en.wikipedia.org/wiki/Lithium-ion_capacitor

author: amyk
author_rank: Super Contributor
timestamp: September 04, 2015, 11:36:39 am
content: Quote from: bktemp on September 04, 2015, 10:19:47 amCombining the ultra-high-current capability of capacitors with the volatility of a lithium battery? That doesn't sound too safe... what happens if you short one?

author: Psi
author_rank: Super Contributor
timestamp: September 04, 2015, 11:39:19 am
content: Quote from: amyk on September 04, 2015, 11:36:39 amever see a Tesla put through a car crusher?

author: krish2487
author_rank: Frequent Contributor
timestamp: September 04, 2015, 11:45:47 am
content: Ohh.. Maybe after watching countless / worthless videos of someone crushing/destroying/drowning iPhones and the likes.. we ll get to see the same with a tesla car!!!Cant wait for it!!!(Wonder what the video on youtube will earn for the content provider though....)Quote from: Psi onTodayat 09:39:19 PM

author: wraper
author_rank: Unknown
timestamp: September 04, 2015, 11:58:45 am
content: IMO he took a lithium polymer battery, covered it with kapton tape, and here you go - SUPERCAPACITOR.

author: tszaboo
author_rank: Super Contributor
timestamp: September 04, 2015, 12:25:29 pm
content: Quote from: amyk on September 04, 2015, 11:36:39 amNo. LIC is different. Go for the German Wikipedia page, it has much more detail.It is also unfortunately stupid expensive now.

author: rx8pilot
author_rank: Super Contributor
timestamp: September 04, 2015, 05:58:34 pm
content: He calls is a capacitor and then touts that it is rechargeable - nice.It will be nice to learn a bit more about ESR, max discharge current, data related to lifetime, and temperature.

author: CatalinaWOW
author_rank: Super Contributor
timestamp: September 05, 2015, 05:03:20 pm
content: My mentor showed me how to parallel a NiCad battery with an electrolytic capacitor back in the 1970s to get an effect similar to a low ESR capacitor with a very large capacitance back in the 1970s. What is old is new again.

author: rx8pilot
author_rank: Super Contributor
timestamp: September 06, 2015, 08:28:41 pm
content: If it is a battery, then it will have a severely limited life compared to a capacitor. You will not be able to discharge to zero without permanent damage, fire, or leaking.It won't take much to test it. If it is a 2000F cap with reasonable ESR/discharge rate better than 20A, sign me up for a few thousand immediately.