Murata manufacturing co., ltd. (20250105463). SECONDARY BATTERY AND BATTERY PACK
SECONDARY BATTERY AND BATTERY PACK
Organization Name
murata manufacturing co., ltd.
Inventor(s)
Toshikazu Nakamura of Kyoto JP
SECONDARY BATTERY AND BATTERY PACK
This abstract first appeared for US patent application 20250105463 titled 'SECONDARY BATTERY AND BATTERY PACK
Original Abstract Submitted
a secondary battery includes an electrode wound body and an outer package can containing the electrode wound body. the electrode wound body includes a stacked body including a positive electrode, a negative electrode, and a separator and being wound along a longitudinal direction thereof, and has a through hole provided through the electrode wound body in a width direction. the positive electrode includes a positive electrode current collector extending in both the longitudinal direction and the width direction, and a positive electrode active material layer provided thereon. the positive electrode active material layer includes a first thin part, a thick part, and a grooved part. the thick part has a thickness greater than a thickness of the first thin part and is adjacent to the first thin part in the longitudinal direction. the grooved part is positioned between the first thin part and the thick part.