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:
So it's some of the performance of a supercap (hundreds of thousands of cycles, up to million-hour lifetimes with a bit of care, less finicky about soldering) with all of the safety of a LiIon battery? I think I'll give it a miss, although it probably has niche applications like use-once military systems where you're not worried about long-term performance before it disassembles itself.
Not AFAIK. A simple capacitor is two metal plates separated by an insulator, allowing an electrical charge to accumulate. Discharge would only be limited by the current-carrying capacity of the wiring.
Limited by material. They store electric charge by using thin layers of insulating material and pooling negative charge on one side and positive on the other. You can puncture the material and release energy as a typical conductor, it's not stored chemically.
Not generally, no. Capacitors usually store electrons in a conductor so they are free to move instantly. Movement of free electrons within a conductor is not considered a chemical reaction.
Not really as large capacity capacitors (this one seems to be 4V) tend to be low voltage as well. You can touch the terminals without harm but attempting to short them is going to be, er, entertaining. I have accidentally touched a 200V capacitor and it was not fun.
You might be able to put more in series if the tolerance of the capacitance value is low enough.
Otherwise, you can use a step-up voltage converter to generate a voltage as high as you want, in order to distribute power at greater distances. You can make bidirectional converters, which work as step-down converters for charging and as step-up converters for discharging.
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...
The direct link to the data sheet:
https://abracon.com/datasheets/AHCR-S04R0S.pdf
So it's some of the performance of a supercap (hundreds of thousands of cycles, up to million-hour lifetimes with a bit of care, less finicky about soldering) with all of the safety of a LiIon battery? I think I'll give it a miss, although it probably has niche applications like use-once military systems where you're not worried about long-term performance before it disassembles itself.
Large, charged capacitors are pretty frightening. Batteries too, but their discharge rate is limited to the speed of the chemical reaction.
Are capacitors not limited by a chemical reaction?
Not AFAIK. A simple capacitor is two metal plates separated by an insulator, allowing an electrical charge to accumulate. Discharge would only be limited by the current-carrying capacity of the wiring.
Limited by material. They store electric charge by using thin layers of insulating material and pooling negative charge on one side and positive on the other. You can puncture the material and release energy as a typical conductor, it's not stored chemically.
Not generally, no. Capacitors usually store electrons in a conductor so they are free to move instantly. Movement of free electrons within a conductor is not considered a chemical reaction.
aka a lightning bolt
Not really as large capacity capacitors (this one seems to be 4V) tend to be low voltage as well. You can touch the terminals without harm but attempting to short them is going to be, er, entertaining. I have accidentally touched a 200V capacitor and it was not fun.
That's interesting. What good is 4V in an EV? You'd need cables as thick as your arm to handle the amperage to do anything useful.
You might be able to put more in series if the tolerance of the capacitance value is low enough.
Otherwise, you can use a step-up voltage converter to generate a voltage as high as you want, in order to distribute power at greater distances. You can make bidirectional converters, which work as step-down converters for charging and as step-up converters for discharging.
> attempting to short them is going to be, er, entertaining.
I think of Styropyro's something like 400 car batteries wired together.