battery advancement
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Re: battery advancement
Me either until read about it in this instance, there is a lot of energy wasted in braking that could be harnessed and give lotgs more range with this technology. If it comes to fruition. Of course you could put regenerative braking on a houseboat, by using sky hook and capturing the energy when you apply that, with your foot.

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Re: battery advancement
How much braking effort are you considering? The current technology LYP cells can handle 5CA, so 100Ah 750vdc battery could handle 75000 x 5 = 375000w or 375kW of braking energy. If you expected the friction between the brake drums/discs and friction material to generate that much heat friction they would melt very quickly so the current technology can handle far more regenerative braking than a VFD or and other form of motor control could handle, then finding some sort of generation device that would fit in a bus and generate that much power would be something out of fairy land using todays technology.
If you look through NP's links you will see someone selling Graphene sheets, yet the magnified surface looks nothing like what every other knowledge base shows Graphene to look like, so ????? Next is the thickness, one place claims an atom thick, how do you even see a sheet one atom thick?????? Making Graphene sheets at home??? Seriously, they still can't make more than lab sample size pieces for testing so using a blender and DVD burner to make sheets one atom thick???? Really?
What does stand out is a link on how to invest in Graphene technology ..... hmmmm, one wonders what the real aim of these websites is, could it be to assist the gullible to part with their hard earned $$$ and invest in "Vapourware" or a product that isn't what it's claimed to be? Do a Google search on Vapourware to get an idea of just how prolific this type of con is, viewer beware ... or if you can see through the smoke and mirrors then a good laugh can be had from many of these sites.
Not long ago a super capacitor battery was all the rage across the forums, until those that really know exposed it to be really an LTO lithium battery with nothing like the manufacturers ability to accept charge, have the storage capacity, deliver current or have the cycle life claimed .... again, buyer beware
T1 Terry
A person may fail many times, they only become a failure when they blame someone else John Burrows
Those who struggle to become a leader, rarely know a clear direction forward for anyone but themselves
Those who struggle to become a leader, rarely know a clear direction forward for anyone but themselves
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Re: battery advancement
wellllllll...
2010 F1 figures braking about 2500kw, power about 550kw.
Not sure how much braking power a typical EV could generate but if you started with 5x the output power........?
2010 F1 figures braking about 2500kw, power about 550kw.
Not sure how much braking power a typical EV could generate but if you started with 5x the output power........?
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Re: battery advancement
If they easily brake traction under power then how would they have more traction when braking?
A person may fail many times, they only become a failure when they blame someone else John Burrows
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Re: battery advancement
ABS, which controls braking, giving the maximum brake energy without breaking traction. Would assume you get much more energy production with ABS than standard brakes, when brakes lock up, there is no energy produced other than on the road surface. Regenerative braking operates in much the same way, if traction is lost, the braking releases as there's no resistance and no energy is produced. So braking is smooth and rapid, have experienced regenerative braking, had a couple of rides in a home built EV, quite amazed at how rapid and smooth extreme braking is using them.
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Re: battery advancement
except F1 cars dont have ABS (it doesnt work as well as real braking-just better than "most peoples" braking)
AND they only have 2 wheel drive, brakes are on all 4 wheels.
Fair point about the grip though, could we say 3x the input power?
Its a bit meaningless as the true figures would be input = KW- inefficiencies, braking input would be road grip x massx gravity on a hill + wind, etc.
So the drive engine is not the best measure of the braking capacity of the vehicle. But a start for debates sake
AND they only have 2 wheel drive, brakes are on all 4 wheels.
Fair point about the grip though, could we say 3x the input power?
Its a bit meaningless as the true figures would be input = KW- inefficiencies, braking input would be road grip x massx gravity on a hill + wind, etc.
So the drive engine is not the best measure of the braking capacity of the vehicle. But a start for debates sake
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Re: battery advancement
When manual regenerative braking is fitted the max braking is a bit like side stepping the clutch after shifting back to first gear, so it is generally a computer controlled slower application to avoid whiplash and bruising from the seat belts. The max limit is usually around the same braking effort as the parachutes being deployed on a Top Fuel dragster, so max regen braking is rarely used other than the Formula E F1 cars and the electric race bikes, although the Pikes Peak electric race cars also us it and they are by far the fastest thing up the hill because of the control over power application and braking.
If they can use todays batteries for the regen braking in these applications then it's only a matter of capacity to contain the amount of regenerated power, not the ability to accept the instant charging current. Tyre friction, wind resistance, motor and drive train losses and a number of other factors mean it would require more energy to climb the hill than could be produced by regenerative braking coming down the same hill, so if there was enough in battery to get up the hill there would be enough space to come back down using regenerative braking and still have room to spare.
The ideal place for a recharge station is at the bottom of the biggest hills on a long distance route, no point in recharging at the top because there would be no room left in the battery to accept the energy from regen braking down the other side.
T1 Terry
If they can use todays batteries for the regen braking in these applications then it's only a matter of capacity to contain the amount of regenerated power, not the ability to accept the instant charging current. Tyre friction, wind resistance, motor and drive train losses and a number of other factors mean it would require more energy to climb the hill than could be produced by regenerative braking coming down the same hill, so if there was enough in battery to get up the hill there would be enough space to come back down using regenerative braking and still have room to spare.
The ideal place for a recharge station is at the bottom of the biggest hills on a long distance route, no point in recharging at the top because there would be no room left in the battery to accept the energy from regen braking down the other side.
T1 Terry
A person may fail many times, they only become a failure when they blame someone else John Burrows
Those who struggle to become a leader, rarely know a clear direction forward for anyone but themselves
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Re: battery advancement
Nothing like doing research into new battery technology and discovering what you thought was the ultimate, was not. Was looking at some youtube videos on graphene batteries and came across this little gem, makes one wonder as to where this is all going. The claim is, hemp batteries are much better than graphene and expect this will not be the end of the quest for the holy grail of batteries. Now will have to do a bit more research into this development, what this bloke says is very logical, hemp is so much cheaper than graphene and can be produced in limitless supplies, without harming the environment or using up resources. Wonder if they will come up with hemp capacitors and will they smoke.
https://www.youtube.com/watch?v=pBnKHieCg0s
https://www.youtube.com/watch?v=fcK9JSxVNUc

https://www.youtube.com/watch?v=pBnKHieCg0s
https://www.youtube.com/watch?v=fcK9JSxVNUc