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Old 12-20-2016, 02:46 PM   #41 (permalink)
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Quote:
Originally Posted by thingstodo View Post
If your battery is charging at 90% efficiency ... it's time to retire it! I would expect 97% would be a bad day. Again - I must be missing something..
Charging a battery involves both a chemical reaction and electric passing through materials that aren't superconductors. Because they are not perfectly efficient, they both produce heat. Inefficiencies like these are seldom linear: the faster you do them, the more inefficient they become. More heat is produced, which makes them still more inefficient if that heat can't be removed.

I think what you're missing is that very few people can afford (or will be willing to pay, even if they could) to pay $20K or so to replace a battery pack on a regular basis.

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Old 12-20-2016, 04:39 PM   #42 (permalink)
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In electrical circuits, they're called I-squared-R losses; don't remember what the chemistry equivalent "loss" name is.
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Old 12-20-2016, 07:11 PM   #43 (permalink)
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Its called Peuket's law.
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Old 12-21-2016, 01:26 PM   #44 (permalink)
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It's the laws of thermodynamics, which translate to:
  • * You can't win.
    * You can't even break even.
    * You can't leave the game
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Old 12-27-2016, 01:38 PM   #45 (permalink)
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Tesla has been playing with liquid cooled charge cables.
,
.

.
.
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Old 12-27-2016, 02:52 PM   #46 (permalink)
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This post should be called:
"How charging your electric car will cost as much as filling up with gas"
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Old 12-27-2016, 03:22 PM   #47 (permalink)
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Quote:
Originally Posted by oil pan 4 View Post
This post should be called:
"How charging your electric car will cost as much as filling up with gas"
But only while traveling out of town.
.
Back and forth to work is $0.12/ kWh and 4.5 miles/ kWh. And emitting 1/3 the carbon.
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Old 01-08-2017, 07:06 PM   #48 (permalink)
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Doesn't temperature in the shade depend on the size of the shade?
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Old 01-09-2017, 12:57 AM   #49 (permalink)
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Probably worth dropping this here.

https://electrek.co/2016/12/24/tesla...ack-elon-musk/
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Old 01-09-2017, 01:24 AM   #50 (permalink)
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Quote:
Doesn't temperature in the shade depend on the size of the shade?
To an architectural draftsman, shade and shadow are two different things, with two different answers.

Quote:
Originally Posted by electrek.co
It is also expected to feature the “robotic snake cable” to enable autonomous charging without having to get out of the car or for self-driving vehicles without anyone in them.
Why can't they call a tentacle a tentacle?

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