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Old 12-12-2017, 04:15 PM   #31 (permalink)
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Old 12-15-2017, 05:54 PM   #32 (permalink)
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Quote:
Originally Posted by JRMichler View Post
Does anybody have any good estimates of kwH per mile for an aerodynamic LRR semi truck? The 13 MPG of the Airflow Bullet Truck implies about 1 kwH per mile. The advertised 500 mile range for the Tesla truck would need a 500 kwH battery.

A Google search comes up with the 85 kwH Tesla battery weighing 1200 lbs, so a 500 kwH battery would weigh about 7000 lbs. Add 1000 lbs or so for motors, and the drive package comes to about 8000 lbs.
Here you go: https://youtu.be/oJ8Cf0vWmxE

https://battery.real.engineering/
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Old 12-17-2017, 04:40 PM   #33 (permalink)
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How do the numbers in those calculations compare to your Airflow Bullet Truck? They use 7.2 m2 frontal area, 0.35 Cd, and 0.00633 Crr to calculate 947 kwH for 500 miles range.
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Old 12-17-2017, 07:46 PM   #34 (permalink)
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Quote:
Originally Posted by rmay635703 View Post
A maximum braking event brings many big rigs frame and xmbr s up into the yield zone and that is ďas designed ď

These trucks ladder frames arenít made to last much more than 10 years in most cases.

Re rails and gliders are common in the industry for this reason

So yes heavy, steady braking or acceleration will cause accelerated wear unless itís in the design case.
Having the battery packs integrated into the frame should increase it's durability/strength ala Tesla's current vehicles.
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Old 12-19-2017, 06:09 AM   #35 (permalink)
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To put the demand for batteries into scale: Tesla is making a big deal out of it's BigF'nBattery that they installed in Australia for grid storage.
.
https://www.greentechmedia.com/artic...try#gs.ZoGYEGw
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This is just 120 trucks worth of batteries. Our proven Lithium and Cobalt reserves are going to go fast. Grid storage should probably find another more abundant chemistry to save the high performance cells for transportation..
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Old 12-19-2017, 10:19 AM   #36 (permalink)
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Lithium and cobalt production will increase if demand is there, and grid storage will choose the most cost effective solution to the problem.
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Old 12-19-2017, 10:59 AM   #37 (permalink)
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You would think that at some point they would start recycling lithium batteries, but "The average lithium cost associated with Li-ion battery production is less than 3% of the production cost." https://waste-management-world.com/a...ling-challenge
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Old 12-19-2017, 11:59 AM   #38 (permalink)
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Quote:
Originally Posted by sendler View Post
To put the demand for batteries into scale: Tesla is making a big deal out of it's BigF'nBattery that they installed in Australia for grid storage.
.
https://www.greentechmedia.com/artic...try#gs.ZoGYEGw
.
This is just 120 trucks worth of batteries. Our proven Lithium and Cobalt reserves are going to go fast. Grid storage should probably find another more abundant chemistry to save the high performance cells for transportation..
I feel the ultimate energy storage device for transportation is a tank of gasoline.
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Old 12-19-2017, 12:02 PM   #39 (permalink)
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phys.org:Cheap, sustainable battery made from tree bark tannins
Quote:
"The greatest benefit of using a renewable polymer tannin is that Nature produces a huge amount of tannin, which can be extracted from underused bark with minimal cost and efforts," Zhu told Phys.org. "The redox-active phenolic hydroxyl groups of tannins are more than 5000 times higher than lignin, which was previously considered to be the most promising biopolymer for electrochemical energy storage. Due to tannin's significant low molecular weight and extremely high phenolic hydroxyl content, the interpenetrating network of tannins and polypyrrole shows an outstanding electrochemical performance. We think tannin is the new champion of naturally occurring redox-active biopolymers."
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Old 12-19-2017, 12:02 PM   #40 (permalink)
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I feel that the ultimate energy storage device is a reactor of plutonium. Better yet, perhaps, antimatter.

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