MUMBAI, India, Aug. 22 -- Intellectual Property India has published a patent application (202517069560 A) filed by Panasonic Energy Co. Ltd., Osaka, Japan, on July 21, for 'cylindrical nonaqueous electrolyte secondary battery.'
Inventor(s) include Yatomi Shota.
The application for the patent was published on Aug. 22, under issue no. 34/2025.
According to the abstract released by the Intellectual Property India: "This cylindrical nonaqueous electrolyte secondary battery includes a positive electrode (11) and a negative electrode (12). The negative electrode (12) includes: a non-facing portion (60) wound, toward a winding start side, from a facing portion (59) facing a winding inner side of a start end portion (11a) of the positive electrode (11), in a winding direction in a state in which the non-facing portion (60) does not face the positive electrode (11); and a negative electrode tab (21) joined to the non-facing portion (60). The negative electrode tab (21) includes a negative electrode facing portion (21a) facing the negative electrode (12) and a lead-out portion (21b) that is shorter in length than a portion which is of the negative electrode facing portion and has the longest length in the longitudinal direction of the negative electrode in an expanded state and is led out to the outside with respect to one end of the negative electrode in the width direction. The portion having the longest length of the negative electrode facing portion is wound around 0.75 times or more and a root portion which is the boundary of the lead-out portion with the negative electrode facing portion is wound around less than 0.5 times. At least one groove (22) extending along the width direction of the negative electrode is provided in the negative electrode facing portion."
The patent application was internationally filed on Jan. 16, 2024, under International application No.PCT/JP2024/000992.
Disclaimer: Curated by HT Syndication.
