Tesla has been granted a patent for an energy storage device with a unique electrode design. The device includes a first electrode with an electrochemically active material and porous carbon, and a second electrode with lithium metal and carbon particles. The method for fabrication involves combining these materials and inserting a separator. GlobalData’s report on Tesla gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Tesla, Battery management systems was a key innovation area identified from patents. Tesla's grant share as of January 2024 was 51%. Grant share is based on the ratio of number of grants to total number of patents.

Energy storage device with lithium-intercalating carbon particles and elemental lithium

Source: United States Patent and Trademark Office (USPTO). Credit: Tesla Inc

A recently granted patent (Publication Number: US11888108B2) discloses an electrode film for energy storage devices, comprising lithium-intercalating carbon particles, elemental lithium metal, and a fibrillized binder. The unique aspect of this electrode film is the formation of lithium intercalating carbon particles coated with elemental lithium metal, creating a homogeneous film that is free-standing and devoid of solvent residues. The electrode film may also include first porous carbon particles and a structural matrix of binder fibrils, enhancing its performance in energy storage applications.

Furthermore, the patent describes a method for fabricating the electrode film without the use of solvents. By combining dry elemental lithium metal and carbon particles, processing them to form coated lithium intercalating carbon particles, and then forming the electrode film, a solvent-free and efficient manufacturing process is achieved. The method also includes laminating the electrode film to a current collector to create an electrode, which can be assembled into an energy storage device such as a battery. The elemental lithium metal used in the process can be in the form of untreated particles, providing a cost-effective and environmentally friendly approach to electrode fabrication. Various processing techniques such as high shear mixing, heating, or exposure to carbonate vapor or liquid can be employed to optimize the electrode film's properties, making it suitable for a wide range of energy storage applications.

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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.