Battery based electric vehicles of today and tomorrow.

[3930dave]

Regenerative braking is not available or reduced when the battery is close to 100% or if it's too cold.

Makes sense.

Might also be a High Temperature Limit on the pack (wrt. Regen Braking), but unless you are drag racing in Phoenix in July, you may not hit it...

Rgds, D.

 

[3930dave]

Bill Gates-backed ESS — which makes giant batteries out of iron, salt and water — starts trading

I expect with all the money being poured into renewables solutions by 2030 a lot of things will be solved.

In a change of events I noticed all countries around the world are calling for more coal production. Moving to renewable energy is fine but somebody didn't get the message that you need the replacement for your current energy sources before you change to a new one.

Recently read about the UK firing up just a bit more coal, as natgas has been spiking.

Other than hydro (one of the reasons I don't like seeing dams demolished), the problem with wind, solar, tidal, cow farts.... is they are transitory (fortunately on the last one !). Ergo, you need something to back up alt nrg.

While dumping costs on consumers and manufacturers seems de rigueur, some jurisdictions balk when it's their own skin in the game to keep the grid up.

Rgds, D.

 

[buckeyefarmer]

That's an east coast thing. In Wyoming, they removed entire mountains.

I live in the middle of coal country, never saw a mountain top removed. Strip mining only occurred where the coal seam was close to the surface. I’m sure there’s an instance somewhere, but in general, this is not true.

 

[Larry Caldwell]

I live in the middle of coal country, never saw a mountain top removed. Strip mining only occurred where the coal seam was close to the surface. I’m sure there’s an instance somewhere, but in general, this is not true.

It's more obvious from the air. Coal trains are miles long and the open pit mines are huge.

 

[airbiscuit]

 

[Citydude]

It's more obvious from the air. Coal trains are miles long and the open pit mines are huge.

You can learn a lot at 10,000 feet cant ya Bub.

 

[Grumpycat]

Regenerative braking is not available or reduced when the battery is close to 100% or if it's too cold.

Also not available at low speeds.

Prius regenerates when you lift the accelerator. Also when you apply the brakes. Light braking can be pure regeneration. Heavier braking mixes regeneration and friction. Quits trying to regenerate at 7 MPH when it seamlessly starts applying friction brakes. Oddly on dry roads you can not feel the transition with light braking, but you pay close attention you can when the roads are wet.

BMW i3 quits regeneration at 12 MPH, under which they reverse the drive to the motor to produce the single-pedal fiction of regeneration to a full stop. The BMW i3 owner's manual never uses the term "regeneration". Apparently not German enough for them. They say, "energy recovery".

Tesla lets you have whatever happens. The accelerator pedal only controls the motor. The brake pedal only controls friction brakes. You get some regenerative braking at low speeds but not much. Tesla doesn't try to fake it by reversing the drive motor the way BMW does.

 

[Grumpycat]

I live in the middle of coal country, never saw a mountain top removed. Strip mining only occurred where the coal seam was close to the surface. I’m sure there’s an instance somewhere, but in general, this is not true.

Locally we have what passes for a mountain (maybe 400'?) being dismantled the past 50 years for gravel.

 

[airbiscuit]

Does anyone seriously believe that mountaintop mining is a sound environmental practice? Tennessee Ernie Ford had it right.

 

[buckeyefarmer]

How about a higher view.
This area was all mined and reclaimed. You would never know it today that it was ever mined. All green, full of trees and fields.