Samsung SDI has been granted a patent for a separator for rechargeable lithium batteries. The separator includes a porous substrate with a coating layer containing a binder and inorganic particles. The binder consists of polyurethane and polyvinyl alcohol in a specific weight ratio, enhancing battery performance. GlobalData’s report on Samsung SDI 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 Samsung SDI, Hydrogen storage alloys was a key innovation area identified from patents. Samsung SDI's grant share as of February 2024 was 64%. Grant share is based on the ratio of number of grants to total number of patents.
Separator for lithium battery with specific coating layer composition
A recently granted patent (Publication Number: US11923496B2) discloses a novel separator for rechargeable lithium batteries. The separator comprises a porous substrate with a coating layer containing a binder and inorganic particles. The binder consists of a polyether polyurethane, polyvinyl alcohol, and a cross-linking agent, with specific weight ratios and molecular weight ranges defined. The cross-linking agent is crucial in forming a cross-linked polymer within the binder, ensuring the separator's effectiveness in lithium battery applications.
Furthermore, the patent claims specify various aspects of the separator, including the composition percentages of the polyether polyurethane and polyvinyl alcohol, the inclusion of a dispersant in the coating layer, and the presence of a (meth)acryl resin in the binder. The patent also extends to cover the use of this separator in a rechargeable lithium battery, positioned between the positive and negative electrodes. This innovative separator design aims to enhance the performance and safety of lithium batteries, addressing key challenges in the field and potentially leading to advancements in 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.
