Northvolt had 30 patents in batteries during Q4 2023. Northvolt AB’s patents in Q4 2023 focus on innovative systems for electrical energy production using compartmentalized cells with ionic liquid electrolytes, electrode lead plates for secondary cells, methods for controlling charge and discharge characteristics of lithium-metal cells, forming electrode stacks, and preparing battery grade metal sulfate solutions directly from metal objects in a continuous process. GlobalData’s report on Northvolt gives a 360-degreee view of the company including its patenting strategy. Buy the report here.
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Northvolt grant share with batteries as a theme is 40% in Q4 2023. Grant share is based on the ratio of number of grants to total number of patents.
Recent Patents
Application: Rechargeable battery cells with negative electrodes comprising lithium metal supported on metalized plastic films (Patent ID: US20230402591A1)
The patent filed by Northvolt AB describes a system for electrical energy production from chemical reagents in a compartmentalized cell, which includes at least two electrodes, a separator, and an ionic liquid electrolyte system. The system can be a battery or part of a battery system, with the electrolyte system comprising an ionic liquid solvent, an ether co-solvent, and a lithium salt. The preferred configuration includes a lithium metal anode, a metal oxide cathode, and a polyolefin separator.
The patent further details specific claims related to a rechargeable battery cell, including the composition of electrodes, separator, and electrolyte. The negative electrode consists of lithium metal on a metalized plastic film, while the positive electrode contains an intercalation material. The ionic liquid electrolyte includes specific components such as an ionic liquid solvent, a non-fluorinated ether co-solvent, and a lithium salt solute. Additional claims cover the thickness of the metalized plastic film, the mass loading of the intercalation material, and the concentration of various components in the electrolyte. The patent also mentions specific lithium salt solutes that can be used, as well as the potential inclusion of other elements in the negative electrode to form an alloy with lithium metal.
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