Electric bikes (1 Viewer)

[nelly]

This might be a silly question but why is there not a system like my lights dynamo to recharge battery as you cycle along or would it just increase the cost to much

Neil

 

[Allan & Loren]

Maybe not powerful enough?

 

[Bartyfixedit]

This might be a silly question but why is there not a system like my lights dynamo to recharge battery as you cycle along or would it just increase the cost to much

Neil

If you pay a fortune then regenerative braking is available on very high end models. I think the jury is out as to whether there is any great benefit.

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[tonyidle]

It would use more energy from the battery to operate the dynamo than the dynamo could replace. Otherwise we'd have free electricity everywhere.

 

[Podney]

Not a silly question. But I don't know the answer.
Do you normally recharge the batteries from the 12volt system whilst driving?
Is it possible to recharge them from solar panel,when stationary?
Not knicking the OP question,just curious!

 

[nelly]

I have recharged them with an inverter and solar but only a couple of times it was good as well as when travelling with an inverter

Neil

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[Badknee]

Just a thought bu the dynamo on a bike is running two bulbs of very low wattage, I think it might need a lot more power to recharge a battery but I like the idea. F1 are using it right now but have thrown millions at it to try to make it work, Honda are failing miserably I'm sorry to say.

 

[nelly]

I was thinking more of a top up to make it last longer as you go along not to totally recharge it i.e. start with a full charge

Neil

 

[Kevan]

My bike battery does 125 miles on a full charge.

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[Silver-Fox]

The simple way of putting it is you don't get energy for nothing.

Or you get out what you put in sort of thing.
So the energy cancels itself out.

 

[WSandME]

Only regenerative braking would make sense. Otherwise, your legs will be putting in power to the batteries as well as the wheels, so harder work, AND, the process of converting leg energy to battery energy is not efficient, so even more work required. As far as I'm aware, there are no "bolt-on" regenerative systems available (if there are, I would love to hear about them )

 

[pappajohn]

My bike battery does 125 miles on a full charge.

Mine does tens of thousands on a full charge

But it uses a hell of a lot of petrol.

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[Infinity31]

The simple way of putting it is you don't get energy for nothing.

Or you get out what you put in sort of thing.
So the energy cancels itself out.

Yep, you can't change the laws of physics.

I read somewhere that the regenerative braking on a ebike can extend your range by about 5%

I guess that means you only have to ride 100 miles downhill to gain 5 miles

 

[Kevan]

Mine does tens of thousands on a full charge

But it uses a hell of a lot of petrol.

No honest, really, look?
FULLY INTEGRATED Positioning the battery behind the seat tube is a tradition at Kalkhoff because it gives the bike a better centre of gravity, and thus offers a considerable advantage in terms of riding stability. What’s new, on the other hand, is the elegant look achieved by its perfect integration into the frame construction. This is achieved by our consistent implementation of the concept of component integration. And along the way, we have also optimised the handling of this long-distance power supply.
Impulse Evo battery uses incredible battery technology. With 50 high-performance cells and a capacity of 17 Ah, under ideal conditions power reserves give a range of up to 125 miles (200 km).
This new battery generation also offers durability, easy handling and rapid recharging. Cleverly, the dual-function charging socket also serves as a service interface through which software updates can be applied to your bike. Moving the battery lock to the top makes unlocking and removing the battery considerably easier.

 

[Infinity31]

Only regenerative braking would make sense. Otherwise, your legs will be putting in power to the batteries as well as the wheels, so harder work, AND, the process of converting leg energy to battery energy is not efficient, so even more work required. As far as I'm aware, there are no "bolt-on" regenerative systems available (if there are, I would love to hear about them )

Bionx do conversion systems that have regen braking. http://ridebionx.com/products/ebike/ebike-systems/

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[Jimbohorlicks]

You could fit a sail and have a pedal free bike, or a solar panel as well to charge up the batteries

 

[Chris51]

My bike battery does 125 miles on a full charge.

125 miles? That must include a lot of pedal power!

 

[Kevan]

125 miles? That must include a lot of pedal power!

Khalkoff's figures not mine, With 50 high-performance cells and a capacity of 17 Ah, under ideal conditions power reserves give a range of up to 125 miles (200 km).

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[Clarky]

Just bought a Kalkhoff bike and when first used you have to fully charge the battery then keep riding the bike until the battery is fully discharged. This is to allow the charge indicator to calibrate apparently.
As we were going away in a few days I wanted to run the battery flat and recharge it before we left.
I rode uphill and down dale to try and discharge it but it just kept going, even with me using the highest power settings to use up the 'juice'.
Eventually it stopped driving the motor after 52 miles. It now shows a range of well over 100 miles on 'eco' setting, even though I have been on a couple of short rides.

Richard.

 

[Infinity31]

My wife has a Kalkhoff that does 50-60 miles with mixed power usage. The big numbers the manufactures state is using eco only.

In reality the max range depends on level of fitness and the terrain.