Tesla confirmed in a new patent for silicon-based battery anodes that it has quietly acquired SiILion, a battery start-up company located in Colorado.
In the past few years, there have been rumors that Tesla acquired SiILion, but there is no definite evidence. This start-up company is working on a new type of high-energy-density battery chemistry based on a ” high-load silicon anode .”
According to the patents, SiILion co-founders Tyler Evans and Daniela Molina Piper, one of their most important patents, are patents called “large battery anodes containing silicon particles”, and are now listed as owned by Tesla.
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Moreover, Tesla is listed as the “applicant” for the patent, and the two co-founders of SiILion are listed as inventors. They describe the anode technology in the patent abstract:
“A large anode containing a high weight percentage of silicon suitable for lithium-ion energy storage devices and batteries and a manufacturing method thereof. The anode material described in this patent may include a film cast on a current collector substrate, wherein the film includes a plurality of active material particles and a conductive polymer film coated on the active material particles.”
Interestingly, during Tesla Battery Day, Tesla officially confirmed that its new 4680 battery is powered by a silicon-based battery anode. Tesla is accelerating the production of cheaper and longer-range 4680 battery cells. In 2019, Tesla also acquired Hibar, a Canadian battery manufacturing equipment company, whose pumps were used in Tesla’s rapid battery assembly process for the new 4680 battery cell.
