| 摘要 |
PURPOSE: A battery cell is provided to form a part concentrating internal pressure, thereby preventing the explosion of a battery due to sudden increase of pressure or temperature in the battery. CONSTITUTION: A battery cell(1000) comprises: a battery part(100) which comprise a first electrode part(110), a second electrode part(120), and a separator(130); a first electrode tab(200) and a second electrode tab(300) which are respectively welded to the first electrode part and the second electrode part; a sealing part(410) in which the first electrode tab and the second electrode tab are protruded outwards and which has a pouch shape sealing the first electrode part, second electrode part, and separator; and a case which comprises a vent part(420) having a specific region with a narrower width than other regions. |
