CATL has obtained patents related to battery cells to reduce connector detachment, decrease short circuits, and enhance the safety of the battery cells.

March 14 News: According to the information from the National Intellectual Property Office, CATL (Contemporary Amperex Technology Co., Limited) has applied for a patent titled “Battery Cell and Power Consumption Device,” with authorization announcement number CN223986675U, granted on March 10, 2026. The application number is CN202423318944.1, with a publication date of March 10, 2026, and a filing date of December 31, 2024. The inventors are Wu Xiaoyuan, Lai Huangkun, Duan Song, Chen Shuo, and Yan Zhibin. The patent agency is Shenzhen Weishibo Intellectual Property Agency (General Partnership), with patent agent Zhang Qihao. The classification codes are H01M50/528, H01M50/531, H01M10/04, H01M10/052, H01M10/0525, H01M10/054, H01M10/058.

Patent Abstract: This application provides a battery cell and power device, wherein the battery cell includes a top cover assembly, an electrode assembly, a transition piece, and a connector. The top cover assembly comprises a cover body and an electrode terminal; the electrode assembly is located on one side of the top cover assembly and includes a pole piece and a pole ear connected to the pole piece; the transition piece is positioned between the top cover assembly and the electrode assembly, and includes a first connection part and a second connection part, with the first connected to the electrode terminal and the second connected to the pole ear; the connector is on the side of the transition piece away from the top cover assembly, with its projection covering the first connection part and offset from the second connection part; the connector is connected to the cover body; it includes a support plate and an adhesive layer near the surface of the support plate close to the first connection part, with the adhesive layer adhering to the first connection part. This design can reduce the probability of connector detachment, and the adhesive layer can adsorb foreign particles, thereby reducing the self-discharge and internal short circuit probability of the electrode assembly, which helps improve the safety of the battery cell.

CATL was established on December 16, 2011, and listed on the Shenzhen Stock Exchange on June 11, 2018. Its registered and business addresses are both located in Ningde, Fujian Province. It is a leading global provider of power battery systems, with core businesses including the research, development, and manufacturing of power batteries and energy storage batteries. The company has strong technical strength and high investment value.

CATL’s industry classification is Power Equipment - Batteries - Lithium Batteries, involving concepts such as Kirin batteries, solid-liquid batteries, Tencent Cloud, among others. The company mainly engages in the research, development, production, and sales of power batteries and energy storage batteries, with products applied across multiple fields and scenarios. It also involves battery materials and recycling businesses, with markets both domestically and internationally.

By 2025, CATL’s revenue reached 423.702 billion yuan, ranking 1st/2nd in the industry, far surpassing the second-ranked Boruiwei’s 2.735 billion yuan, and exceeding the industry average and median of 213.219 billion yuan. In main business, power battery systems accounted for 74.70%, totaling 316.506 billion yuan. Net profit in 2025 was 76.786 billion yuan, ranking 1st/2nd, with the second-ranked Boruiwei at only 54.4961 million yuan, also well above the industry average and median of 38.42 billion yuan.

Recent patent applications by CATL include:

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