"Huge leaps in e-bike battery capacity coming to e-bikes soon"

[Live_Steam_Mad]

Spotted this ;-

http://ebiketips.co.uk/content/news/huge-leaps-in-e-bike-battery-capacity-coming-to-e-bikes-soon-428

...thoughts?

I can't see where the extra capacity is coming from without increasing weight proportionately?! Is energy density actually increasing? I must be missing something?

Regards,

Alistair G.

 

[flecc]

I'd replace the word "huge" with "improved" to get rid of the hype.

The report deliberately understates the existing batteries to make the improvement appear greater. For example quoting 500 charges at present, when the truth is that we already have the better batteries exceeding 1000 charges.

The misspelt last sentence below indicates nothing special, since these figures have long been commonplace:

"The two varients Panasonic will offer are both 36V integrated battereis with the option of 8Ah or 12Ah allowing for 288Wh and 432Wh of power."
.

 

[Gubbins]

As I see it the only way forward with electric vehicles in general would be with a totally new technology. What we have now apears to be as good as it gets with the current tek

 

[Deleted member 4366]

As I see it the only way forward with electric vehicles in general would be with a totally new technology. What we have now apears to be as good as it gets with the current tek

That's not quite right. Battery technology is gradually moving forward. 5 years ago a 3kg 10 Ah battery capable of giving 15 amps would have been a good one. now, we have 3kg 14 Ah capable of 40 amps. Normally, we get about 10% improvement every year, but the jumps are getting bigger now. Last year, we got the panasonic/samsung GA cell, which jumped from 2.9 Ah to 3,5 Ah at the same time as increasing current rate by nearly double.

There's plenty more to come yet, just like computer processors, which continue to get more powerful every year. I can remember reading that they'd never go beyond 1 GHz, but now we have 4 GHz and more.

 

[Rohloffboy]

Yep the link features the new Tesla Panasonic 2170 Cell which is now in production, according to the Tesla CEO Elon Musk, this is to be the worlds highest density and lowest price Cell, which will yield around 30% reduction in battery pack cost.

What's not to like.

 

[Woosh]

Have they (Tesla) released the specs of their new 2170 cells yet?
What counts is the gravimetric and volumetric energy density of their new cell compared to the current best from Panasonic, Samsung, Sony etc.
Until they do, I'll take the news as vapourware. There is a small saving on ancillary weight when making a larger cell (2170 compared to 18650) but I wouldn't believe that it's more than 5%.

 

[Danidl]

Yep the link features the new Tesla Panasonic 2170 Cell which is now in production, according to the Tesla CEO Elon Musk, this is to be the worlds highest density and lowest price Cell, which will yield around 30% reduction in battery pack cost.

What's not to like.

I'm with dv8 on this one.. a new factory , a tweaked manufacturing process, marginal improvements in cell chemistry, bigger cells, all making slight improvements can yield your 10% year on year improvements

 

[Crockers]

A 10% PA compounded improvement is quite substantial.

 

[Danidl]

A 10% PA compounded improvement is quite substantial.

Yep marginal improvements.... some in weight, some in discharge rates , some in overall capacity, some in mass production technique .
An interesting observation I picked up in a car magazine is that the requirements of automotive and bike batteries are fundamentally different. Cars will need cells which can charge very quickly , otherwise the number of public filling stations becomes enormous (petrol cars fill in 10 minutes , electric cars take at least 10 times longer ). Bikes on the other hand could take longer to charge without significant penelty.

 

[flecc]

Yep marginal improvements.... some in weight, some in discharge rates , some in overall capacity, some in mass production technique .
An interesting observation I picked up in a car magazine is that the requirements of automotive and bike batteries are fundamentally different. Cars will need cells which can charge very quickly , otherwise the number of public filling stations becomes enormous (petrol cars fill in 10 minutes , electric cars take at least 10 times longer ). Bikes on the other hand could take longer to charge without significant penelty.

Yes, I've been maintaining that for years, e-car battery advances not necessarily suitable for e-bikes. And of course as well as the charge time differences, the e-biker also has the instantly available second battery range extension.

The e-car would need a trailer for that.
.

 

[Rohloffboy]

Check out Tesla battery swop out on YouTube, quite amazing although I don't think they fully rolled out the program.