On 26/05/2021 13:21, The Natural Philosopher wrote:
On 26/05/2021 10:33, Pancho wrote:
On 26/05/2021 10:14, John Rumm wrote:

Funny you should mention that, but:

https://www.forbes.com/sites/michael...an-lithium-ion



Yep, that was a very interesting story. More interesting than nuclear
fusion stories.

I dunno how much is hype, but if not it could be significant. With
massively quicker charge times it might be possible to reduce battery
capacity too. Maybe charge at traffic lights etc, with smart
infrastructure.

Plus I hardly every drive more than 50 miles in one go.

Airliners hardly ever experience more than 1.5G loading.
Do you want to fly in one that *can't* experience more than 1.5G loading
without the wings folding?


I was recently looking at climbing equipment, generally specified as
safe up to loads of 25KN, I suspect I fell for the hype and cheaper 12KN
would have been fine for me.

However car range is different.

There are two factors. The main factor of range is how often I'm willing
to stop to refuel. With Lithium Ion batteries the problem is long
charging times, people want bigger capacities because they don't want to
stop from an hour to recharge. If they can recharge in minutes they
would be more willing to stop.

The car battery analogy to your example is the power reserve I need to
get me to a recharging station in case of emergency. Where I live I
would expect recharging stations to be closely spaced, requiring little
emergency capacity.