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Might Tesla have a million-mile battery in the works? New evidence supports claim

Hamartia Antidote

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https://www.cnet.com/google-amp/news/tesla-million-mile-battery-range-specs-upgrade/

Here's the thing with electric-car batteries: one day, they simply won't discharge their energy and recharge the energy as well as they once did. To combat degradation, automakers work hard to ensure batteries last well beyond a typical vehicle's lifecycle. Oftentimes, they even have plans for what to do with the units afterward.

Tesla, often known for going big at every corner, wants to double down on its batteries' life cycles. After CEO Elon Musksaid this past April that the company will create a battery that lasts 1 million miles, it appears the outspoken executive wasn't fibbing. Wired on Monday reported on the purported million-mile battery after Dalhousie University in Canada published a paper detailing chemistry that might enable such a cell

The university, Wired notes, has an exclusive agreement with Tesla. So it's easy to connect those dots. Tesla, meanwhile, did not return a request for comment. For now, we need to rely on the evidence presented.

Jeff Dahn led the team of researchers at Dalhousie University and noted in the paper that such a battery would work well for fleets of autonomous cars and trucks used to travel long distances. While a lithium-ion battery in Tesla vehicles today works as intended, a vehicle such as, say, the Tesla Semi could benefit from a battery with such a long service life.

What's interesting is the paper provides full specifics on this battery's chemistry and how to achieve such a long life cycle. Why? We don't have a proper answer, but after Wired spoke to a member of Dahn's team, it sounds like Tesla already has an even better battery chemistry based on this research. Translation: Anyone can read the details and use the information, but Tesla already has something better. That's what we infer, not a confirmed fact, for the record.

The described battery chemistry juices up familiar ingredients and includes larger crystals to make up the battery nanostructure's cathode. The larger crystals are not nearly as likely to crack while charging, a student in Dahn's lab told Wired. When these do crack in other batteries, performance drops.

The entire chemistry apparently provides a more perfect balance of storing more energy and maintaining battery life. According to the research paper, 4,000 discharge and charge sessions showed only a 10% loss in energy capacity. As noted in the original report, a similar study from 2014 showed a lithium-ion battery lost 50% of its energy capacity after 1,000 discharge and charge cycles.

The final juicy bits of the report? Tesla and Dahn received a patent for a similar sounding battery after the research paper's publication. While this type of battery isn't the holy grail known as solid-state units, it could truly open up the possibilities for EVs in the near future.
 
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https://ww.electrek.co/2019/12/26/tesla-patents-battery-chemistry-cheaper/

Tesla patents new chemistry for better, longer-lasting and cheaper batteries

Tesla has made a lot of battery moves this year and it is closing the year by filing a patent on a new chemistry for better, longer-lasting and cheaper batteries.

Earlier this year, we reported on Tesla’s battery research partner, Jeff Dahn and his team at Dalhousie University, unveiling the impressive results of tests on a new battery cell that could last over 1 million miles in an electric vehicle.

The new battery tested is a Li-Ion battery cell with a next-generation “single crystal” NMC cathode and a new advanced electrolyte.

Since then, Tesla has been filing US and international patents on the new battery chemistry.

The automaker, through its ‘Tesla Motors Canada’ subsidiary, filed a new international patent called ‘Dioxazolones and nitrile sulfites as electrolyte additives for lithium-ion batteries’.

They wrote in the patent application:

“This disclosure covers novel battery systems with fewer operative, electrolyte additives that may be used in different energy storage applications, for example, in vehicle and grid-storage. More specifically, this disclosure includes additive electrolyte systems that enhance performance and lifetime of lithium-ion batteries, while reducing costs from other systems that rely on more or other additives.”

Tesla wrote in the conclusion of the patent application for the new battery chemistry:

“This work characterizes the high temperature storage and long-term cycling performance of lithium-ion NMC/graphite pouch cells prepared with a recently developed electrolyte additive, MDO, and two new additives, PDO and BS. Differential capacity versus voltage indicates that both MDO and PDO form passive SEI layers on the graphite electrode surface during cell formation, whereas BS does not. The reduction features are generally consistent with DFT-predicted values, although the presence of multiple reduction peaks requires additional study to rationalize. As individual additives, PDO-containing cells show the best performance although these are nonetheless out-performed by VC-containing cells. The additives were also tested in binary blends with VC, DTD, and LFO. In long-term cycling tests, cells prepared with 2%PDO/l%DTD and 2%PDO/l%LFO additive blends outperform VC-containing cells. However, the high temperature storage behavior of 2%PDO/l%LFO is superior than that of the 2%PDO/l%DTD blend. A person of skill in the art will understand that compositions described herein may be further optimized, for example, by adjusting the ratio of primary and secondary additives or through introducing ternary blends.”

The patent application says that the new two-additive mixtures in an electrolyte solvent can be used with lithium nickel manganese cobalt compounds, also known as an NMC battery chemistry.

It is commonly used in electric vehicles by many automakers, but not by Tesla. The company used the technology in its stationary energy storage systems, but it uses NCA for its vehicle battery cells.

The patent filed by Tesla’s battery research group mentions that the technology would be useful for both electric vehicles and grid-storage.

Interestingly, Tesla has been rumored to be switching to NCM battery cells for Chinese Model 3 vehicles.

Tesla has been filing new battery patents as it has also been making moves toward building its own battery cells.

Earlier this year, Tesla CEO Elon Musk said that they built Model 3 to last as long as a commercial truck, a million miles, and the battery modules should last between 300,000 miles and 500,000 miles.

However, the CEO claimed that Tesla has a new battery coming up next year that will last a million miles.
 
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https://www.cnet.com/google-amp/news/tesla-million-mile-battery-range-specs-upgrade/

Here's the thing with electric-car batteries: one day, they simply won't discharge their energy and recharge the energy as well as they once did. To combat degradation, automakers work hard to ensure batteries last well beyond a typical vehicle's lifecycle. Oftentimes, they even have plans for what to do with the units afterward.

Tesla, often known for going big at every corner, wants to double down on its batteries' life cycles. After CEO Elon Musksaid this past April that the company will create a battery that lasts 1 million miles, it appears the outspoken executive wasn't fibbing. Wired on Monday reported on the purported million-mile battery after Dalhousie University in Canada published a paper detailing chemistry that might enable such a cell

The university, Wired notes, has an exclusive agreement with Tesla. So it's easy to connect those dots. Tesla, meanwhile, did not return a request for comment. For now, we need to rely on the evidence presented.

Jeff Dahn led the team of researchers at Dalhousie University and noted in the paper that such a battery would work well for fleets of autonomous cars and trucks used to travel long distances. While a lithium-ion battery in Tesla vehicles today works as intended, a vehicle such as, say, the Tesla Semi could benefit from a battery with such a long service life.

What's interesting is the paper provides full specifics on this battery's chemistry and how to achieve such a long life cycle. Why? We don't have a proper answer, but after Wired spoke to a member of Dahn's team, it sounds like Tesla already has an even better battery chemistry based on this research. Translation: Anyone can read the details and use the information, but Tesla already has something better. That's what we infer, not a confirmed fact, for the record.

The described battery chemistry juices up familiar ingredients and includes larger crystals to make up the battery nanostructure's cathode. The larger crystals are not nearly as likely to crack while charging, a student in Dahn's lab told Wired. When these do crack in other batteries, performance drops.

The entire chemistry apparently provides a more perfect balance of storing more energy and maintaining battery life. According to the research paper, 4,000 discharge and charge sessions showed only a 10% loss in energy capacity. As noted in the original report, a similar study from 2014 showed a lithium-ion battery lost 50% of its energy capacity after 1,000 discharge and charge cycles.

The final juicy bits of the report? Tesla and Dahn received a patent for a similar sounding battery after the research paper's publication. While this type of battery isn't the holy grail known as solid-state units, it could truly open up the possibilities for EVs in the near future.
very promising .
 
.
Then powering a gaming laptop for the entire day of usage.

A smartphone that lasts for the entire month in a single charge.
 
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