And yet another battery breakthrough...

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The article references this source which has more details: https://techxplore.com/news/2019-10-lithium-ion-battery-electric-vehicle.html

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In order to shorten heat time and heat the entire battery at a uniform temperature, Wang and colleagues outfitted a lithium ion battery design with a self-heating nickel structure that preheats in less than thirty seconds. To test their model, they charged three graphite pouch cells designed for hybrid electric vehicles at 40, 49, and 60 degrees Celsius, as well as a control at 20 degrees Celsius, using various cooling strategies to maintain constant charge temperatures. To confirm that lithium plating did not occur, they later fully discharged the cells and opened them for analysis.

Wang and the team found that the batteries preheated to 60 degrees Celsius could sustain the extremely fast charging process for 1,700 cycles, while the control cell could only keep pace for 60 cycles. At an average charge temperature between 49 and 60 degrees Celsius, the research did not observe any lithium plating. The researchers also observed that an increased charge temperature greatly reduced the cooling necessary to maintain the cell at its initial temperature—the control cell generated 3.05 watt-hours, while the 60-degree-Celsius cell generated only 1.7 watt-hours.
. . .​

It turns out Bjørn Nyland has a CANbus analyzer and has found that Tesla already 'heats' the battery for Supercharging and then brings the temperature down in operation. Tesla is doing this today.

Bob Wilson
 
bwilson4web said:
The article references this source which has more details: https://techxplore.com/news/2019-10-lithium-ion-battery-electric-vehicle.html

. . .
In order to shorten heat time and heat the entire battery at a uniform temperature, Wang and colleagues outfitted a lithium ion battery design with a self-heating nickel structure that preheats in less than thirty seconds. To test their model, they charged three graphite pouch cells designed for hybrid electric vehicles at 40, 49, and 60 degrees Celsius, as well as a control at 20 degrees Celsius, using various cooling strategies to maintain constant charge temperatures. To confirm that lithium plating did not occur, they later fully discharged the cells and opened them for analysis.

Wang and the team found that the batteries preheated to 60 degrees Celsius could sustain the extremely fast charging process for 1,700 cycles, while the control cell could only keep pace for 60 cycles. At an average charge temperature between 49 and 60 degrees Celsius, the research did not observe any lithium plating. The researchers also observed that an increased charge temperature greatly reduced the cooling necessary to maintain the cell at its initial temperature—the control cell generated 3.05 watt-hours, while the 60-degree-Celsius cell generated only 1.7 watt-hours.
. . .​

It turns out Bjørn Nyland has a CANbus analyzer and has found that Tesla already 'heats' the battery for Supercharging and then brings the temperature down in operation. Tesla is doing this today.

Bob Wilson
Click to expand...
So, Tesla uses a self-heating nickel structure that preheats in less than 30 seconds, and can charge 200 miles in 10 minutes? And it can maintain this fast charging for 1700 cycles?

I think my Kona also has a heat function (winter mode) to charge the battery faster. But nowhere near 200 miles in 10 minutes.
 
R P said:
So, Tesla uses a self-heating nickel structure that preheats in less than 30 seconds, and can charge 200 miles in 10 minutes? And it can maintain this fast charging for 1700 cycles?

I think my Kona also has a heat function (winter mode) to charge the battery faster. But nowhere near 200 miles in 10 minutes.
Click to expand...
As for the claims of the inventors, 10 years sounds about right. Meanwhile, Tesla has been doing thermal cycling since the Model 3 ... over two years ago.

When (if) you watch the YouTubes, you'll discover Tesla is warming the battery in anticipation of SuperCharger session and then cools the battery during driving. It is part of their BMS managing the temperature using their affordable, existing thermal management. This keeps the individual cell costs affordable and selling more Teslas.

Bob Wilson
 
R P said:
Tesla uses a self-heating nickel structure that preheats in less than 30 seconds
Click to expand...
Actually Tesla uses waste heat from the electric motor(s) to warm the battery. In contrast, "self-heating" violates the laws of thermal dynamics. The heating comes with using energy that otherwise would be used to power the car. Inefficiencies in the power electronics and motors leads to heat that is used to warm the batteries.

Sandy Munro discussed this with the Tesla Super Bottle:
tesla-model-3-superbottle-1024x597.jpg

There is an excellent article about this existing, two year old, efficiency system:
https://www.teslarati.com/tesla-model-3-superbottle-disruption-video/

You might read: https://en.wikipedia.org/wiki/Conservation_of_energy. There is no 'free energy' but you can get useful work before the energy reaches waste heat levels.

Bob Wilson
 
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