ELECTRODE GROUP FOR NONAQUEOUS BATTERY AND METHOD FOR PRODUCING SAME, AND TUBULAR NONAQUEOUS SECONDARY BATTERY AND METHOD FOR MANUFACTURING SAME

摘要

A positive electrode 2 includes a positive electrode current collector lead 70 connected to a core exposed part 78 formed at a longitudinal center of a current collector core 72. A negative electrode 3 includes a double-coated part 14 including an active material layer 13 and a porous protective film 28 formed on each surface of a current collector core 12, a core exposed part 18, and a single-coated part 17 which is located between the double-coated part 14 and the core exposed part 18, and includes the active material layer 13 and the porous protective film 28 formed only on one of the surfaces of the current collector core 12. A plurality of grooves 10 are formed in each surface of the double-coated part 14, while the grooves 10 are not formed in the single-coated part 17. A negative electrode current collector lead 20 is connected to the core exposed part 18. The negative electrode 3 is wound in such a manner that the core exposed part 18 constitutes a last wound end.