NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR MANUFACTURING SAME

摘要

The negative electrode of a non-aqueous electrolyte secondary battery has a negative electrode collector (21A) and a negative electrode active material layer (21B). The negative electrode collector (21A) has a thickness of 20 µm to 50 µm inclusive. The negative electrode active material layer (21B) is provided on at least one surface of the negative electrode collector (21A). A negative electrode is fabricated by cutting a negative electrode original plate to a predetermined width, so that a cut-residual portion (21D) remains at a cut end of the negative electrode. The cut-residual portion (21D) is formed by stretching the negative electrode collector (21A) upward or downward in the thickness direction of the negative electrode and extends toward the inside of an electrode group (31).