Cylindrical Battery Cell, Battery Pack and Vehicle Including the Same

原文（中国語）

A battery cell may include a contacting wall surface with an expanded inner diameter at an open end of a sidewall of a battery can of the battery cell. The cap covering the open end includes a press-fitted contacting surface portion in contact with the inner circumferential surface of the contacting wall surface portion, and an electrode connecting part connected to an electrode tab of an electrode assembly accommodated in the battery can. The press-fitting depth of the cap into the battery can is regulated by the electrode connecting part of the cap and the electrode tab of the electrode assembly. The contacting surface portion and the contacting wall surface portion are bonded and electrically connected by welding. A battery pack may include the battery cell, and a vehicle may include the battery pack.