Huawei’s three major battery patents exposed-EEWORLD

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On January 2, the State Intellectual Property Office announced three battery- related patents from Huawei, involving battery materials , battery performance, safety and other issues. Two of them are invention patents and the remaining one is a utility model patent. That is to say, if the invention patent passes the preliminary examination, it must pass the substantive examination before the application is successful, while the use of new type patent has been obtained.

details as follows:

1. Cathode materials and preparation methods, secondary batteries and terminal equipment

The applicants for this invention patent are Huawei Technologies Co., Ltd. and Harbin Institute of Technology. The application publication number is CN117334851A. The application date is June 2022. The inventors are Cheng Xiaolu, Wang Jiajun, Sun Nan, and Gong Meng.

The abstract shows that this application provides a cathode material and its preparation method, secondary batteries and terminal equipment. The cathode material includes a core and a coating layer provided on the surface of the core. The material of the coating layer includes M1xM2yO, where M1 is at least one of Ti, Ta and Zr, and M2 is at least one of Nb, Mg and Al. The ratio of x and y is less than 1; the core contains M1 and M2, and the atomic ratio of M1 and M2 in the core is greater than 1. This cathode material forms a coating layer mainly composed of M1xM2yO on the surface of the core. At the same time, the lattice of the cathode active material of the core is doped with M1 and M2, which can buffer the chemical potential difference at the interface between the electrolyte and the cathode material, reducing The space charge effect and the occurrence of interface side reactions improve the cycle stability of the cathode material.

Source: State Intellectual Property Office

2. Modifiers and their uses, modification methods of cathode materials, electrolytes, secondary batteries and terminal equipment

The applicant for this invention patent is Huawei Technologies Co., Ltd., the application publication number is CN117334902A, the application date is June 2022, and the inventors are Cheng Xiaolu, Wang Jiajun, Sun Nan, and Gong Meng.

The abstract shows that this application provides a modifier and its use, a method for modifying positive electrode materials, an electrolyte, a secondary battery and terminal equipment. This modifier is used to improve the wettability between the cathode material and the electrolyte of the secondary battery. The molecular structure of the modifier includes at least one cathode material group and at least one electrolyte solution group; the cathode material group can be a group capable of forming a chemical bond with the transition metal in the cathode material; the electrolyte solution group It is a group with similar or identical polarity to the solvent molecules in the electrolyte. When the modifier provided by this application is used in secondary batteries, it improves the wettability between the positive electrode material and the electrolyte, facilitates the transmission of active ions at the interface between the two, thereby reducing the interface resistance and reducing the battery electrode ization, thereby improving the rate performance and cycle performance of secondary batteries.

Source: State Intellectual Property Office

3. Batteries and electrical equipment

The patentee is Huawei Technologies Co., Ltd., the authorization announcement number is CN220290949U, the application date is June 2023, and the authorization date is January 2, 2024. The inventors are Huang Da, Yang Jixiang, Hou Tianhong, and Deng Yaoming.

The abstract shows that embodiments of the present application provide a battery and electrical equipment, which relate to the field of battery technology and are used to improve the problem of water accumulation in batteries. The battery includes: a battery body with side surfaces and a first insulating film wrapping the battery body. The first insulating film includes a first part that is in contact with the side of the battery body and a second part. The second part is folded along the interface between the first part and the second part to cover the surface of the first part away from the battery body. The second part is in contact with the first part.