Sumitomo Metal Mining had 77 patents in batteries during Q4 2023. Sumitomo Metal Mining Co Ltd filed patents in Q4 2023 for a positive electrode active material for lithium ion batteries with specific composition ratios and characteristics, a precursor of the active material with reduced impurities for improved battery safety, and a method for producing the precursor. Additionally, they patented an atomization device for manufacturing metal powder from molten metal, with features such as fluid spray nozzles, means for measuring molten metal surface height, and a shape that increases the surface area of poured molten metal with height. GlobalData’s report on Sumitomo Metal Mining gives a 360-degreee view of the company including its patenting strategy. Buy the report here.

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Sumitomo Metal Mining grant share with batteries as a theme is 48% in Q4 2023. Grant share is based on the ratio of number of grants to total number of patents.

Recent Patents

Application: Positive electrode active material for lithium ion secondary battery, method for producing the same, and lithium ion secondary battery (Patent ID: US20230378455A1)

The patent filed by Sumitomo Metal Mining Co Ltd describes a positive electrode active material for lithium-ion secondary batteries, consisting of a lithium-nickel-manganese composite oxide with a hexagonal layered structure. The material has specific ratios of lithium, nickel, manganese, an additional element M, and titanium, along with defined crystallite diameter, and specific surface area parameters. The material also exhibits controlled particle size distribution and lithium elution in water, meeting stringent criteria for use in lithium-ion batteries.

Furthermore, the patent details a method for producing the positive electrode active material, involving mixing, firing, water-washing, and drying steps under specific conditions. The method ensures the formation of the lithium-nickel-manganese composite oxide with the desired composition and structure. The resulting material is suitable for use in lithium-ion secondary batteries, meeting the outlined specifications for particle size distribution, lithium elution, and electrochemical performance, thus contributing to the advancement of battery technology.

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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.