Tesla patented anodeless lithium metal batteryJuly 13, 2020
The automaker has filed a patent for unique electrolyte solutions for new lithium metal batteries without the use of anodes. The technology will be part of a project to create a battery for electric cars with a mileage of one million miles, according to Electrek.
Last year, an article by the Jeff Dahn research team from the University of Dalhousie, the Tesla Canada team and the University of Waterloo was published in the journal Nature. Scientists have described lithium metal cells with a double salt electrolyte without using an anode. Promising technology has laid the foundation for the development of batteries that can offer Tesla customers electric cars with record mileage of one million miles (1.6 million kilometers).
Tesla continued to work to increase the energy density and battery life of the experimental batteries. Using the new technology will allow the company, among other things, to reduce the cost of producing such batteries – their cost is lower than those used today.
A new patent entitled “Electrolytes with lithium difluoro (oxalato) borate and lithium tetrafluoroborates for lithium metal and anode battery cells” does not disclose exact figures, but merely describes the technical side of the issue. The developers talk about a few pros and cons of lithium metal batteries.
“Lithium-metal anodeless batteries offer a number of advantages over traditional lithium-ion batteries due to their high energy intensity. Cells without anodes are cheaper and easier to assemble due to the lack of anode coating, ”say Tesla engineers. But there are also problems.
Such batteries are much more efficient than traditional lithium-ion ones in energy density, but they are inferior to popular batteries in terms of durability. Jeff Dan, the study leader, does not describe the details, but claims that the new electrolyte will increase the number of charge cycles. Now the batteries Tesla has been experimenting with for the past year can only withstand 50 cycles.
More information about the new technology will be announced at the Battery Day event, which Elon Musk has scheduled for September 15th.
The company Ilon Mask is filling up patent offices with new applications in various fields throughout 2020. First, Tesla Energy patented the technology for creating a scalable distribution grid, then the company got the idea to use the entire fleet of electric vehicles for AI training, and two months ago Tesla sent an application for a new battery with electrodes without printed contacts.
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