Northvolt has been granted a patent for a secondary cell design with improved electrode assembly securing mechanisms. The cell includes end plates with current collectors and spacer arrangements to ensure secure electrical contacts and assembly alignment. The method for assembling such a cell is also detailed in the patent. GlobalData’s report on Northvolt 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 Northvolt, Hydrogen storage alloys was a key innovation area identified from patents. Northvolt's grant share as of January 2024 was 12%. Grant share is based on the ratio of number of grants to total number of patents.

Secondary cell with improved electrode assembly securing mechanism

Source: United States Patent and Trademark Office (USPTO). Credit: Northvolt AB

A recently granted patent (Publication Number: US11888182B2) discloses a secondary cell design comprising an electrode assembly housed within a casing. The casing includes a body, a first end plate, and a second end plate, with the first end plate featuring a first current collector connected to a first terminal of the cell, while the second end plate houses a second terminal. The design incorporates a contacting tab on the first end plate to establish electrical contact between the anode electrode and the first current collector. Additionally, spacer arrangements on both end plates secure the electrode assembly in the length direction of the body, with the second end plate's current collector attached to the cathode electrode to ensure stability orthogonal to the body's length direction.

Furthermore, the patent details a method for assembling the secondary cell, involving the insertion of the electrode assembly through the body's second open end. The process includes attaching the contacting tab to the anode electrode's first tab and the first current collector, positioning spacer elements to secure the assembly, and affixing the second current collector to the cathode electrode. The method emphasizes the precise arrangement of components to ensure electrical connectivity and structural integrity within the casing. Additionally, the method involves insulating the contacting tab from the casing's sidewall and sealing the first end plate to the casing's rim. Overall, the patented design and assembly method aim to enhance the performance and reliability of secondary cells through a well-thought-out structural configuration and assembly process.

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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.