The United States Patent and Trademark Office (USPTO) has granted patent US12586822B2 to Marposs for a novel system and method designed for leak testing finished battery cells. The patented technology incorporates a vacuum chamber, a vacuum pump, and a specialized detecting and measuring system capable of identifying gases or vapors escaping from the cell. A key feature is the capillary element connecting the detection system to the vacuum chamber, facilitating the flow of leaked gases. The system also includes heating devices to make it memory-free, ensuring accurate and reliable testing of battery cell integrity.

This patent grant signifies a new technological development in battery manufacturing quality control. While not a regulatory mandate, it represents an advancement that manufacturers of battery cells, particularly those focused on safety and performance, may consider adopting or licensing. The filing date was July 13, 2021, and the patent was granted on March 24, 2026. No immediate compliance actions are required for regulated entities, but companies in the battery manufacturing sector should be aware of this patented technology.