MUMBAI, India, July 13 -- Intellectual Property India has published a patent application (202617076256 A) filed by Ningde Amperex Technology Limited on June 19, 2026, for Battery Cell Casing, Pressure Relief Mechanism Of Battery Cell, Battery Cell, And Electrical Apparatus.
Inventors include Zhang, Guowen; and Chen, Mingqi.
The application for the patent was published on July 10, 2026, under issue no. 28/2026.
Abstract: A battery cell casing, a pressure relief mechanism (2) of a battery cell, a battery cell (10), and an electrical apparatus. The battery cell casing comprises a casing body (1) and a pressure relief mechanism (2); a through hole (20) is formed in the casing body (1); the pressure relief mechanism (2) is arranged in the through hole (20); the pressure relief mechanism (2) comprises an adhesive film (21) and a cover piece (22); the cover piece (22) is bonded to the casing body (1) by means of the adhesive film (21) and covers the through hole (20); the adhesive film (21) can be heated and melted to form a pressure relief channel communicating the interior and the exterior of the casing body (1); the bonding area of the cover piece (22) and the casing body (1) is A, and the cross-sectional area of the through hole (20) covered by the cover piece (22) is B, wherein 1.778=A/B=16.361. According to the structure, the range of the ratio of the bonding area A of the cover piece (22) and the casing body (1) to the cross-sectional area B of the pressure relief channel covered by the cover piece (22) is limited, so that when the internal pressure of the battery cell (10) reaches a preset value, the cover piece (22) can fall off in time to form a pressure relief channel, and the internal pressure of the battery cell (10) is reduced in time, and thus, the battery cell (10) can has good reliability while achieving overheating pressure relief.
Disclaimer: Curated by HT Syndication.
