BATTERY CELL

摘要

Disclosed is a battery cell in which a first angle that is the angle between a collector (313) and an inclined surface (316) that ranges from an end portion of the collector (313) to a surface (311) of a first electrode active material (314) is larger than a second angle that is the angle between the collector (313) and an inclined surface (317) that ranges from the end portion of the collector (313) to a surface (312) of a second electrode active material (315).