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

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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.

Here’s Tesla’s full patent application:

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U.S. lawmakers urge speedy action on U.S semiconductor chips funding

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A bipartisan group of 38 U.S. House lawmakers on Thursday urged leaders in Congress to immediately set a path to advance legislation providing $52 billion for U.S. semiconductor production including $2 billion in support for chips used by the automotive industry.

The  U.S. Senate voted 68-32 in June to approve a sweeping package of legislation intended to boost the country’s ability to compete with Chinese technology, including providing $52 billion for chips, but the measure has stalled in the House.

The House lawmakers in a letter warned of the “dire consequences the automotive industry as a whole—and the nation—faces if we fail to advance legislation soon.”

 

(Reporting by David Shepardson)

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MacBook Pro's M1 Max GPU is Over 3x Faster Than M1 in First Metal Benchmark – MacRumors

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Multiple benchmarks have already given us a general estimate of the CPU performance of the M1 Max chip, but we’ve had little insight into GPU performance. The ‌M1‌ Max is equipped with up to 32 graphics cores, marking a vast improvement over the 8-core GPU of the ‌M1‌, which was Apple’s first chip.


The first Metal benchmark for the ‌M1‌ Max surfaced this afternoon, with the chip earning a score of 68870. Comparatively, the ‌M1‌ chip in the 13-inch MacBook Pro has a Metal score of 20581, and the Radeon Pro 5600M, which was the highest-end GPU option for the prior Intel-based 16-inch model, has a Metal score of 42510.

Compared to the fastest chip available in Apple’s previous-generation 16-inch MacBook Pro, the ‌M1‌ Max is 62 percent faster, and it’s 3x faster than the ‌M1‌ chip in the 13-inch MacBook Pro, based on the Metal score we have so far.

It’s not clear if this ‌M1‌ Max chip is the 24-core variant or the 32-core variant. This is also just one result, so we should be able to get a better picture of the graphics performance when additional benchmarks are available.

According to Apple, the 32-core GPU in the ‌M1‌ Max is up to 4x faster than the ‌M1‌. Apple has said that the chip delivers performance “comparable to a high-end GPU in a compact pro PC laptop” while consuming up to 40 percent less power.

Since we last shared CPU benchmarks for the ‌M1‌ Max/Pro chip, several additional results have surfaced. Comparing multiple benchmarks, the ‌M1‌ Max/Pro earns an average single-core score 1742 and an average multi-core score of 12135.

The chip has the highest single-core score of any Mac to date, and it is only beaten in multi-core performance by the 16, 18, 24, and 28-core Intel Xeon chips used in the higher-end iMac Pro and Mac Pro models.

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U.S. safety board says driver, passenger seats occupied during fatal Tesla crash

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National Transportation Safety Board(NTSB) said on Thursday that both the driver and passenger seats were occupied during an April 17 fatal crash of a Tesla Model S in Spring, Texas.

Local police previously said witness statements indicated there was nobody in the driver’s seat of the Model S when it crashed into a tree. The NTSB said a review of vehicle data show “both the driver and the passenger seats were occupied, and that the seat belts were buckled when the (event data recorder) recorded the crash.”

 

(Reporting by David Shepardson)

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