8 comments

[ 2.9 ms ] story [ 24.4 ms ] thread
And no mention of the self discharge rate.
For a similar part in this class:

Low Leakage Current as small as 1µA Low Self-discharge rate, 72 hours @ discharge <5%

https://abracon.com/datasheets/AHCR-S04R0S.pdf

The more the Farads the higher the leakage. The higher the tempature the higher the leakage.

That would work for most UPS applications, but it looks like the price is still too high.
(comment deleted)
Let's say you want to make a hybrid car lighter-weight. Where is this useful?

Power density and cycle life are truly impressive. Energy density is super low

For anyone that wants to see a real data sheet:

Nominal Voltage: 4.0V High Power and Energy Densities Cycle Life > 50K Cycles Capacitance Range: 10F-1200Farads

https://abracon.com/product-lineup/frequency-control-timing-...

Note that the original data sheets said that these could be wave soldered. ABSOLETLY NOT. Even hand soldering they must be treated with respect, a lot of respect.

One of the major problems with these is there a minimal voltage that they must not go below. Their life gets shortened. I've never seen data on how much.

To my knowledge Li-Ion Capacitors were first introduced to the market by Taiyo-Yuden in 2010. They are no longer in this market. I wrote a blog about it back then:

http://blog.softwaresafety.net/2010/11/introducing-lithium-i...

Dumb question but I though capacitors store energy and not power?
Large, charged capacitors are pretty frightening. Batteries too, but their discharge rate is limited to the speed of the chemical reaction.