[Sunil2307]

Came across this article
https://www.vice.com/en_us/article/7...-in-10-minutes

If this becomes mainstream, I think one more box will be ticked in favour of EVs and their adoption. Its probably still in the lab, and take at least a couple of years more to see the light of the day. But once it does, it will probably a step in the right direction. Lets wait and watch this space.

[bmw_lover]

Fellow bhpians, it seems that finally the EVs are going to become mainstream transportation method for all of us and all of our problems are going to be solved. A breakthrough has been found to fast charge the batteries of EVs by raising their temperatures while charging. Apparently doing this can charge them in just 10 min for around 300 miles without damaging the life of the batteries. Sharing an article from TOI on 1.11.2019

Now, all you need is 10 minutes to charge e-cars

New Battery Can Add 320Km To 480Km Of Driving Range If Charged At An Elevated Temperature
Anthony Cuthbertson

Engineers have discovered a way to recharge electric cars in just 10 minutes, overcoming one of the biggest obstacles with electric vehicles.

Electric cars currently take longer than an hour to fully recharge, with the original Tesla Model S taking 75 minutes to achieve a full charge.


Researchers at Pennsylvania State University developed a lithium-ion battery capable of adding 200 to 300 miles (320km to 480km) of driving range to an electric car in 10 minutes by charging it at an elevated temperature.

To get around this constraint, the researchers raised the temperature of their experimental battery to 60 degrees Celsius during the charge cycle, then lowered it back down as it was used.

What this does is “limit the battery’s exposure to the elevated charge temperature, thus generating a very long cycle life,” said senior author Chao-Yang Wang, a mechanical engineer at The Pennsylvania State University.

“In addition to fast charging, this design allows us to limit the battery’s exposure time to the elevated charge temperature, thus generating a very long cycle life,” said Wang.

“The key is to realise rapid heating; otherwise, the battery will stay at elevated temperatures for too long, causing severe degradation ... The 10-minute trend is for the future and is essential for adoption of electric vehicles because it solves the range anxiety problem.”

The extremely fast charging process could be carried out without causing significant damage to the battery, meaning it could sustain 2,500 charging cycles — the equivalent of half a million miles of travel. Typical lithium-ion batteries would only last around 60 charges using the new method.

The discovery comes just weeks after the inventors of the first lithium-ion battery were awarded the 2019 Nobel Prize in Chemistry.

The combined work of John Goodenough, Stanley Whittingham and Akira Yoshino led to the first commercially viable lithium-ion battery being produced in 1985. They are now used in everything from mobile phones to laptops, as well as the rapidly growing electric vehicle industry.

The researchers now hope to improve this charge time to just five minutes.

“We are working to charge an energy-dense electric vehicle battery in five minutes without damaging it,” Wang said. “This will require highly stable electrolytes and active materials in addition to the self-heating structure we have invented.”

[phamilyman]

Wow. This is very interesting.


But it doesn't solve, rather exacerbates the problem for India. How are you going to deliver so much power to so many millions of vehicles nationwide in such surges? Whats the system we need to deliver that super-high and non-deterministic peak power demand? We barely keep our head above water when it comes to power supply to the last mile / common man

[GTO]

Thread moved out from the Assembly Line. Thanks for sharing!

[bmw_lover]

Originally Posted by phamilyman

But it doesn't solve, rather exacerbates the problem for India. How are you going to deliver so much power to so many millions of vehicles nationwide in such surges? Whats the system we need to deliver that super-high and non-deterministic peak power demand?

Well no disrespect but i think that is a typical pessimist logic. Do you mean to say that we Indians should look away from EVs altogether because of this power shortage problem. Going by that logic we Indians should do away with ICE cars as well as most of the crude oil is imported and its a huge anchor on our fiscal deficit problem. Aren't ICE cars exacerbating any problems?


Problems are always going to be there. But this can be easily solved if the govt. wants to. India has one of the largest coal reserves in the world. And all this power will not be required at once. Even 40% transition to EVs will take atleast 10 years in India. Even if we don't transition to EVs, we are still short on power and the shortage seems to be increasing every year. But big cities do have alternate arrangements for that.

Think like this - 70% transition to EVs in just metros, Tier 1 and Tier 2 cities for passenger cars and 2 wheelers. And long haul commercial trucks and buses (inter state) transition to electric which can be charged at rest stops. Now the power problem doesn't seem too big.

[bmw_lover]

To add to Phamilyman's power shortage point, India also has the largest reserves of Thorium in the world. Which is believed to be the future for power generation.

That is why we hear about cases of illegal sand mining in news. The ever so powerful sand mafia is illegaly exporting all the sand out of the country. And guess who is buying - the US of A.

So basically power is not the problem, will power is!

[LEOMAN]

Originally Posted by phamilyman

Wow. This is very interesting.
But it doesn't solve, rather exacerbates the problem for India. How are you going to deliver so much power to so many millions of vehicles nationwide in such surges? Whats the system we need to deliver that super-high and non-deterministic peak power demand? We barely keep our head above water when it comes to power supply to the last mile / common man

Well in India, its a long dream come true. I am into manufacturing of led lights on the outskirts of Mumbai ie. Vasai (Maharashtra), here in industry there are frequent power cuts once or twice a day because of shortage of power & lack of infrastructure. Friday is staggering day, imagine how would EV's survive in such infrastructure.

CNG filling stations were recently introduced in Vasai area for autos & other vehicles. Building an EV charging station will cost a bomb. According to me government of India should convert all the BEST buses to electric first and other means of transport such as auto's, Ola's & UBER on priority.

[sgiitk]

I doubt it. Remember any charging will involve heating of the battery. So how does the heat get dissipated. So i will keep my judgement reserved.

[Punatic]

Popular Mechanics ran this story yesterday (12th Nov 2019) about a group of researchers at Penn State University who have reported that heating a Lithium-ion battery to 140ºF (60ºC) and then cooling it down rapidly drastically reduces the charging time. They used a thin layer of nickel that absorbed the excess heat and distributed the charge evenly.

The findings were published to the Joule journal on 30-Oct-2019.

To quote from the paper:

Electric vehicles will only be truly competitive when they can be charged as fast as refilling a gas tank. The US Department of Energy has set a goal of developing extreme fast charging (XFC) technology that can add 200 miles of driving range in 10 min. A critical barrier to XFC is Li plating, which usually occurs at high charge rates and drastically deteriorates battery life and safety. Here, we present an asymmetric temperature modulation (ATM) method that charges a Li-ion cell at an elevated temperature of 60°C to eliminate Li plating and limits the exposure time to 60°C to only ∼10 min per cycle to prevent serious materials degradation. Using industrially available battery materials, we show that a high-energy (209 Wh/kg) Li-ion cell with the ATM method retains 91.7% capacity after 2,500 XFC cycles (equal to 500,000 miles of driving range), far exceeding the US Department of Energy (DOE) target (500 cycles at 20% loss).

Fingers crossed!

[DarthVeda]

Originally Posted by phamilyman

But it doesn't solve, rather exacerbates the problem for India. How are you going to deliver so much power to so many millions of vehicles nationwide in such surges? Whats the system we need to deliver that super-high and non-deterministic peak power demand? We barely keep our head above water when it comes to power supply to the last mile / common man

Lets look at current situation, we import crude oil from Middle East and other oil producers, and how do we convert the oil to petrol/diesel, it's through refinement and what does that need? you guessed it Power! I would think of it more like shift of power consumption from oil to direct vehicles. We are also investing heavily in Solar, Wind and Nuclear, and power generation will increase with the demand coming in.

[gkveda]

I think the solution is not that simple if the EV is produced and used in large scale.

One way to solve the problem is,
1. Standardization of batteries across cars and companies
2. Replacement of discharged batteries with fully charged ones, similar to Gas Cylinders. Whenever the Gas cylinder in Kitchen is empty, it will be replaced with filled cylinder and empty one is taken back to refilling station.

Similarly, there should be power bunks where charged Batteries are stored. Any car who is in the need of new battery should come to bunk, change the battery in 10 mins and fly away.

Of course, battery placement in the car should be such that replacement operation is just as simple as refilling the fuel

[Reinhard]

Heating a battery to charge it faster? And what heats it up? 60 degrees isn't a low temperature. Do we run a small camp fire under the car? And then how to control the temperature at 60 & not let it go higher?

And for now, I'll refuse to buy that such heated + fast charging will not impact a battery's life. It is surely going to have thermal impact on the composition & material. I'm quite sure.

For now - I don't think this is realistic or that this can safely fly. Glad if I get proven wrong in future of course.

[phamilyman]

Originally Posted by DarthVeda

Lets look at current situation, we import crude oil from Middle East and other oil producers, and how do we convert the oil to petrol/diesel, it's through refinement and what does that need? you guessed it Power! I would think of it more like shift of power consumption from oil to direct vehicles. We are also investing heavily in Solar, Wind and Nuclear, and power generation will increase with the demand coming in.

Gentlemen,


Please don't confuse new capacity with dramatic increases in peak throughput given we are a power deficit nation. Just because I can drive at 100kph in one car and because i own 5 cars doesn't mean I can reach any place at 500kph.

[volkman10]

Battery that recharges '160 km in 5 minutes' will have global production in 2024.

StoreDot aims to manufacture its extremely fast recharging XFC batteries on three continents: America, Europe and Asia.

These cells, when they finally reach production at scale, could represent a profound change in the world of electric cars. They have high energy density and, above all, ultra-fast charging capability.

In the official statement, StoreDot announced a manufacturing strategy that is focused on localizing its supply chain in the U.S., Asia and Europe, enabling it to serve its OEM customers in their own locations, reducing carbon impact and enabling just-in-time production efficiency

These batteries will be produced in existing and future local gigafactories of partner companies, rather than Storedot's own facilities, with production expected to begin late next year.

To date, the startup has disclosed several advances in the development of extremely fast charging cells, highlighting the collaborative process, where more than 15 global automotive manufacturers are already testing these batteries. This network of global partners and investors spans the entire battery ecosystem.

And just to stay in the automakers, we can include big names like Daimler, VinFast, Volvo Cars, Polestar and Ola Electric.

Link