Tesla patented millionth batteryDecember 28, 2019
We know that Tesla millionaires are real, but their owners at least once replaced the traction battery in cars, and someone twice. The company wants to bring battery survivability to the level of the machine itself.
Tesla Canada has filed an international patent application for “dioxazolones and nitrile sulfites as electrolyte additives for lithium-ion batteries.” This is one of the results of a research project conducted by Tesla along with Jeff Dan and his colleagues at the University of Dalhousie (Canada). Dan built an experimental lithium-ion cell with a “next-generation single-crystal NMC cathode and a new advanced electrolyte,” which could last a million miles in the bowels of the battery. Tesla has already submitted a number of applications for its components.
The head of Tesla, Elon Musk, recently said that the Model 3 sedan itself is already designed for a million miles of work, and its batteries – for about 300-500 thousand miles (482-804 thousand km).
The chemistry of NMC batteries involves a cathode containing nickel, manganese, and cobalt compounds. Many car manufacturers use NMC cells with different compositional variations. Tesla (namely in electric cars) has cathodes of a different type – NCA (nickel, cobalt, aluminum). According to unofficial data, NMC cells will be used in the Tesla Model 3 for the Chinese market, according to Electrek. The machines themselves and their batteries will be localized at the Gigafactory 3 factory in Shanghai.
Tesl’s long-running maintenance data suggests that their batteries function normally for at least 160,000 miles (257,000 km) with a loss of about 10% of their original capacity over this period.
According to Tesla, new electrolyte additives that increase the life of a lithium battery are not too expensive and can be a beneficial alternative to other ingredients that battery cell manufacturers are already using or are trying to use to increase their durability. It is not entirely clear whether Tesla and her partners will have time to turn this patent “chemistry” into mass technology in the new year. One way or another, but it was on 2020 that Musk announced the appearance of a battery designed for a million miles of service life.
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