BYD has been granted a patent for a ternary cathode material for lithium-ion batteries. The material features a specific single-crystalline particle structure with defined molar ratios of elements in the central and surface layers, enhancing battery performance. The patent also includes a method for preparing the material. GlobalData’s report on BYD 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 BYD, Battery management systems was a key innovation area identified from patents. BYD's grant share as of May 2024 was 71%. Grant share is based on the ratio of number of grants to total number of patents.

Ternary cathode material for lithium ion batteries

Source: United States Patent and Trademark Office (USPTO). Credit: BYD Co Ltd

A recently granted patent (Publication Number: US11996555B2) discloses a novel ternary cathode material for lithium-ion batteries. The material consists of a LiNi1-x-y-zCoxMnyMzO2 compound with a micron-sized single-crystalline particle structure. The composition includes specific ratios of nickel, cobalt, and manganese in both the central and surface layer portions of the particles. Additionally, the material may have a fast ion conductor material coating on its surface, enhancing its performance in battery applications.

The patent also details a method for preparing the ternary cathode material, involving precise formulation of nickel, cobalt, manganese, and M sources, followed by co-precipitation reactions, sintering, and pulverizing steps. The process includes specific conditions for each stage, such as stirring speed, temperature, and pH control. The resulting material exhibits a well-defined particle structure with controlled dimensions, making it suitable for use in lithium-ion batteries. Furthermore, the patent describes the incorporation of the ternary cathode material into a lithium-ion battery cell, highlighting its potential application in energy storage devices for various industries.

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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.