Another "new" battery paper

JamieGeek

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hybrid2bev

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What I donā€™t get about these ā€˜charges as fast as refuelingā€™ things is what does the DC fast charger output need to be in order to add 60-80 kWh to the battery in 3-5 minutes and how feasible is that given the existing electric charging infrastructure.
 
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JamieGeek

JamieGeek

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What I donā€™t get about these ā€˜charges as fast as refuelingā€™ things is what does the DC fast charger output need to be in order to add 60-80 kWh to the battery in 3-5 minutes and how feasible is that given the existing electric charging infrastructure.
They just need a supercap at the DCFC so that it can slowly charge up and then bam! dump that charge into your car.

Not only the charger but think of how large the cables and connectors would need to be for that.
 

zhackwyatt

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They just need a supercap at the DCFC so that it can slowly charge up and then bam! dump that charge into your car.

Not only the charger but think of how large the cables and connectors would need to be for that.
This is probably the best way:
lightning-delorean.jpg
 

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Or for those who want to read the paper, I saw this when it came out a few days ago:
 

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They just need a supercap at the DCFC so that it can slowly charge up and then bam! dump that charge into your car.

Not only the charger but think of how large the cables and connectors would need to be for that.
I really think there's huge potential in used EV batteries as on-site storage at DCFC sites. That could potentially result in faster peak DCFC than the site's grid connection + give old batteries a second life.
 

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What I donā€™t get about these ā€˜charges as fast as refuelingā€™ things is what does the DC fast charger output need to be in order to add 60-80 kWh to the battery in 3-5 minutes and how feasible is that given the existing electric charging infrastructure.
720kW for 60kWh in 5 minutes
1.6MW for 80kWh in 3 minutes

The insanely expensive Lotus Evija will supposedly accept an 800kW charge rate, but I know of no existing infrastructure to support that.
 

zhackwyatt

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720kW for 60kWh in 5 minutes
1.6MW for 80kWh in 3 minutes

The insanely expensive Lotus Evija will supposedly accept an 800kW charge rate, but I know of no existing infrastructure to support that.
I think that's why the "next" thing is 800volt architecture right? Increase voltage w/o having to increase amps to get more watts.
 

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I think that's why the "next" thing is 800volt architecture right? Increase voltage w/o having to increase amps to get more watts.
Yep. That's a common strategy in aircraft electronics. 270VDC-540VDC is a routine power bus these days, replacing 28VCD, allowing smaller (lighter) wiring.
 
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Battery maker EVE eyes more lithium, cobalt ahead of price increase
Annie Lee
Bloomberg

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EVE Energy Co., a Chinese producer of lithium-ion batteries for electric cars to earphones, is considering plans to step up purchases of key metals amid signs prices could soon rise from recent lows.
Huizhou, Guangdong-based EVE, which has pacts with automakers including Daimler AG, has seen tentative signals of a recovery in lithium and cobalt prices in China, meaning thereā€™d be an advantage to lock in additional supplies now, Chairman Liu Jincheng said in a phone interview.
ā€œWe are seriously considering whether we can buy more while they are cheap now,ā€ Liu said, adding that forecasts on the price outlook remain difficult.
The producer is weighing its metal purchasing plans as it seeks to expand output and narrow the gap on the worldā€™s top battery makers. EVE Energy is the fifth largest supplier to Chinaā€™s EV sector, with a 5% market share, trailing behind competitors including Contemporary Amperex Technology Co. Ltd. and BYD Co., according to BloombergNEF data.


Prices of lithium chemicals plunged from mid-2018 as producers rushed to deliver more supply, overwhelming the pace of demand gains. The materials have stabilized in recent months, though remain at about half the level of peak values, BNEF said in a report this month.
ā€œWe are expecting both Chinese domestic and seaborne lithium prices to stay flat for the next three months, and pick-up toward the end of Q4,ā€ BNEFā€™s head of metals and mining Sophie Lu said by phone. Cobalt prices have recovered as Covid-19 disruptions impacted supply, and thereā€™s potential for Chinaā€™s domestic prices to rise, she said.


Lithium prices are being supported by a recovery in demand for electric vehicles in China, according to Alice Yu, a Beijing-based analyst at S&P Global Market Intelligence.
The prospect of a tighter battery metals markets has been brought into focus after Tesla Inc. said it plans to secure future supply needs by producing its own lithium chemicals, in addition to agreements with existing manufacturers. Lithium demand from the battery sector is likely to increase ninefold through 2030, while cobalt requirements will grow threefold, BNEF forecasts.

As the battery sector builds scale and end-users demand more advanced technology, EVEā€™s Liu expects industry consolidation, with smaller players likely to find it harder to compete. ā€œUnless they have a distinctive edge in their products, they will be forced to exit the battery race,ā€ he said.
EVE has begun to review opportunities for potential partnerships, acquisitions or mergers in regions including the U.S., Europe, Japan and South Korea, according to Liu, who said heā€™s worked in the lithium-ion battery industry for 35 years.
ā€œWe have yet to find any suitable targets,ā€ Liu said. ā€œWeā€™d want to look for the best in terms of equipment, and we are also concerned about the quality of production and management.ā€
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