ElectricMotorcycleForum.com
Makes And Models => Zero Motorcycles Forum | 2013+ => Topic started by: Francois on July 26, 2017, 02:24:39 PM
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hello someone heard about graphe batterie for 2018?
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I do, but i can't confirm.
doc
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I do, but i can't confirm.
Doc
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https://energy.gov/sites/prod/files/2016/06/f32/es213_kepler_2016_o_web.pdf (https://energy.gov/sites/prod/files/2016/06/f32/es213_kepler_2016_o_web.pdf)
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Cool, Faresis paper. Some technical details in there. Wonder how long it will take for it to make it into production. Could be years, I imagine. Or maybe it's already in there : - ) 3C charge rate doesn't hurt the cells, I hear, maybe that's novel electrodes at work. Can you comment, LiveForPhysics?
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A bit off topic but what ever became of graphene light bulbs?
A few years late......
https://www.engadget.com/2015/06/17/graphene-light-bulb/ (https://www.engadget.com/2015/06/17/graphene-light-bulb/)
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I have used supposed Graphene LiPo batteries in model aircraft, specifically multi-rotor or "drone" to use modern day parlance. They tend to be very high C rated, starting at 70C and going upward depending on various types.
My experience, and that of others, is that these provide a very "punchy" output on demand without getting all stressy and puffing up. But they also have one characteristic that I personally find quite irritating ... when they give up the GIVE UP .... fast! Literally dropping off the edge of a cliff. Power output goes from Hero to Zero (sic) in a matter of moments, little tapering off.
Given how powerful the existing batteries are in the Zero range of motorcycles I question whether Graphene will do anything much for our benefit. We don't need more C of power output. We need greater energy density and the Graphene LiPo of today, at least, do not do anything to improve energy density for a given physical size.
In short - more free-flowing electrons but no improvement in pack energy density.
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I have used supposed Graphene LiPo batteries in model aircraft, specifically multi-rotor or "drone" to use modern day parlance. They tend to be very high C rated, starting at 70C and going upward depending on various types.
My experience, and that of others, is that these provide a very "punchy" output on demand without getting all stressy and puffing up. But they also have one characteristic that I personally find quite irritating ... when they give up the GIVE UP .... fast! Literally dropping off the edge of a cliff. Power output goes from Hero to Zero (sic) in a matter of moments, little tapering off.
Given how powerful the existing batteries are in the Zero range of motorcycles I question whether Graphene will do anything much for our benefit. We don't need more C of power output. We need greater energy density and the Graphene LiPo of today, at least, do not do anything to improve energy density for a given physical size.
In short - more free-flowing electrons but no improvement in pack energy density.
The reason is because of a significant decrease in internal resistance. That decrease in internal resistance also results in a decrease in heat generated. If you ride fast and charge fast heat is a problem so I would definitely welcome any improvement. Also enables faster charging.
The sharp drop off also means you get full or near full power right until the battery is dead. Current gen Zero's reduce power as charge goes down starting at around 70%. I would absolutely love to be able to get full power or near full power right until 0%.
Sign me up please :)
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Hello,
I have been collecting some data about present and future (and perhaps science fiction ;) ) batteries.
I have put them here
https://docs.google.com/spreadsheets/d/1I6s1wDRKDxaI3wNfBJt4U5z26c81Qvi9rWT7J9-vT7U/edit?usp=sharing
where you can add your own data if you want (please add a line for each new information).
Regards
Gerard