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What is a Lithium-ion capacitor?

jtekt.co.jp

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Re: What is a Lithium-ion capacitor?

#7

Post by ricardobeat »

mrDmrTmrJ wrote: post #5

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

Interestingly it seems to have some applications for high peak power and regen, they had a car in the Dakar rally:

https://www.jtekt.co.jp/e/products/capacitor/capacitor_mobil...

https://www.jtekt.co.jp/e/engineering-journal/assets/1019/10...

Re: What is a Lithium-ion capacitor?

#8

Post by colechristensen »

mrDmrTmrJ wrote: post #5

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

You would use these to provide peak power in a system that had short term power needs that were high above the average power needs AND had that power requirement as a bottleneck. Energy is the bottleneck for cars though, not power. unless you're wanting your prius to accelerate like a ferrari

Maybe it would be useful for less losses with regenerative braking? These would presumably be able to charge much faster and then trickle that power out to the normal battery. You'd need actual power numbers for a car to determine if it would be useful or not.

In other words this is for "boy I wish I didn't have to have so much extra battery capacity in order to get the power I need" situation which... cars don't have. Maybe in F1?

Re: What is a Lithium-ion capacitor?

#9

Post by rpaddock »

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...

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