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[Ashveratu]

https://cleantechnica.com/2022/11/04/enevate-lightning-motorcycles-partnership-creates-5-minute-fast-charge-for-electric-motorcycles/

I just hope they are starting to making something instead of news.

[Richard230]

It looks to me like Lightning has hooked up with a new battery manufacturer and they both have doubled-down on BS.   

[MVetter]

This news make no sense:
  - 5 minutes to charge 18.000 Wh needs 216 kilowatts power -
  - With a 110 Volts mains you need 1963 amps
  - Your cable would need a section of 40 cm in copper and still dissipate 10 kw of heat (that is what you need to heat a standard house)

This is my favorite post. Somehow interpreting people writing about DC fast charging to instead be level 1 AC and doing the math of how many amps you'd need.

edit- the best part is actually doing the math totally wrong. 18x5 != 216.

[Moto7575]

Good point. What's the math for DC ?

This news make no sense:
  - 5 minutes to charge 18.000 Wh needs 216 kilowatts power -
  - With a 110 Volts mains you need 1963 amps
  - Your cable would need a section of 40 cm in copper and still dissipate 10 kw of heat (that is what you need to heat a standard house)

This is my favorite post. Somehow interpreting people writing about DC fast charging to instead be level 1 AC and doing the math of how many amps you'd need.

[MVetter]

I'm just gonna copy/paste from what they wrote:

Upon the first tests, 400 Amps were delivered at a charge rate nearing 5C which resulted in a blazing fast charge time of fewer than “10 minutes” for an additional 135 miles.

[Fred]

  - 5 minutes to charge 18.000 Wh needs 216 kilowatts power -

edit- the best part is actually doing the math totally wrong. 18x5 != 216.

I'd double check your maths. 18kWh in 5 minutes is 18000 / (5/60) - i.e. 18kWh in 1/12 hr - and is indeed 216kW.

[Moto7575]

I'm really impressed...

I'm just gonna copy/paste from what they wrote:

Upon the first tests, 400 Amps were delivered at a charge rate nearing 5C which resulted in a blazing fast charge time of fewer than “10 minutes” for an additional 135 miles.

[MVetter]

I'd double check your maths. 18kWh in 5 minutes is 18000 / (5/60) - i.e. 18kWh in 1/12 hr - and is indeed 216kW.

My math was for a 5C charge rate because that's what was written.

[HoodRichOG]

Good to know they are still active in their main line of business - manufacturing press releases.

[Richard230]

Good to know they are still active in their main line of business - manufacturing press releases.

 

[Fran K]

From the article in post 1.

 24-kWh battery pack with Enevate technology.

400 Amps were delivered

 charge rate nearing 5C

fewer than “10 minutes” for an additional 135 miles.

A) there is no voltage given

B) 24kwh battery pack is not claimed to be nominal or cheating max voltage times amp hours.

Charging a 24kwh pack at say 4.75 C 
fully charged in 60/4.75 minutes    12.6 minutes  Half a charge in 6 or so once up to max rate not sure how long that takes it is 30 seconds for my ktm charger.  Once all plugged in and switched on.

Seems like 135 miles on 70% of full charge give or take.  24*0.7=16.8 kwh to go 135mi.  I am thinking this would get me about 80 miles on my 240 pound ktm freeride going at speeds that wind resistance is negligable.  Soneone else can do watt hours per mile.

Then later on in the linked article.
the newly equipped Strike Carbon has traveled over 1,000 miles on the road while “refueling” at 350kW public charging stations with results staying consistent.

The way I understand it a 350 kw station is only 350 if supplying 500 volts.  So if it is 250 volts operating system on the lightning bike really only 175 kw could be drawn.

[Fran K]

I copied the picture from the link in post 1

The heart of that looks great.  The seat is minimal, the front brakes are huge, the back one kind of a mis match.  The air flow underneath seems considered.  The weight and weight distribution look like much option available behind that body work.

[Richard230]

BTW, what is the life expectancy of a small battery pack being charged at 5C? 

[DerKrawallkeks]

The size of the battery does not matter for the life expectancy at 5C, since 5C is a charge rate that stresses all cells, no matter how large the pack.

The only place I know of where 5C is actually achieved, other than in press releases, is in rc lipo batteries, which have a low cycle life, compared to automotive grade battery cells.