Contemporary Amperex Technology has been granted a patent for a lithium-ion battery featuring a positive-electrode plate. This plate includes a current collector, an active substance layer, and a binder-free inorganic dielectric layer, with a resistance not exceeding 8 ohms, enhancing battery performance. GlobalData’s report on Contemporary Amperex Technology 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 Contemporary Amperex Technology, Hydrogen storage alloys was a key innovation area identified from patents. Contemporary Amperex Technology's grant share as of July 2024 was 31%. Grant share is based on the ratio of number of grants to total number of patents.
Positive-electrode plate for lithium-ion batteries
The patent US12074315B2 describes a novel positive-electrode plate designed for lithium-ion batteries, which includes a current collector and at least one active substance layer. The active substance is defined by a specific chemical formula that incorporates various elements, including lithium, nickel, cobalt, and optional components such as manganese or aluminum. A key feature of this design is the inclusion of an inorganic dielectric layer that is free of binders, which is applied to the surface of the active substance layer. This dielectric layer is structured in discrete lamellae and is engineered to ensure that the resistance of the positive-electrode plate does not exceed 8 ohms. The thickness of the dielectric layer is carefully controlled to extend between 1/1000 to 1/10 of the active substance layer's thickness.
Further claims detail the composition and structure of the inorganic dielectric layer, which can consist of various materials such as aluminum oxides, silicon nitrides, and magnesium fluorides. The patent also specifies parameters for the average particle diameter of the dielectric nanoclusters and their relationship to the layer's thickness. Additionally, the positive-electrode plate is characterized by a compacted density and porosity range, as well as specific dimensions for the active substance particles. The invention extends to the lithium-ion battery that incorporates this positive-electrode plate, along with a negative-electrode plate, separator, and electrolyte, and includes provisions for a second dielectric layer on the negative electrode. The overall design aims to enhance the performance and efficiency of lithium-ion batteries, making it suitable for various applications, including battery modules and packs.
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