| 摘要 |
PROBLEM TO BE SOLVED: To provide a secondary battery capable of, even when gas is generated, securely exhausting the gas from a predetermined position and preventing deformation of a battery element.SOLUTION: The secondary battery includes: a battery element 20 including a positive electrode, a negative electrode, and a separator; a film jacket 10 for accommodating the battery element; and a reinforcement member 65, on which a cut-off part 66, capable of boring the film jacket by being in contact with the film jacket, is formed, directly or indirectly fixed to the batter element.SELECTED DRAWING: Figure 4A |
