Replying to a Twitter thread surrounding the possibility of an electric airplane, Musk said batteries with 400 watt hours per kilogram are highly likely in the next three to four years. And not just one-off units, either, but mass produced batteries with long lifecycles, too.
This type of energy density could provide 50% more energy density compared to today’s batteries, noting today’s batteries used in thefeature an energy density of about 260 Wh/kg. The more energy packed into a battery, the longer the driving range for a vehicle.
In conjunction with Musk’s comments, Tesla itself released a teaser showing a peculiar pattern with numerous dots. Reuters reported the pattern could hint at silicon nanowire anode, which if realized, could help Tesla achieve more energy dense batteries with longer usable lives. Tesla did not immediately respond to a request for comment.
This year’s been rife with speculation surrounding Tesla battery news. From Panasonic’s pledge toin the years to come, to China’s CATL’s work with Tesla on a , there’s been no short supply of energy-related news. Tesla also applied to become a utility provider in the UK earlier this year, just as we learned more about the company’s to manage their energy production and sell electricity back to the grid.
We’ve got less than a month to go before Battery Day kicks off on Sept. 22, and we’ll surely hear more before then. Musk likes to share on Twitter. A lot.
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