| 摘要 |
Non-aqueous electrolyte secondary batteries use an organic solvent as an electrolyte, and in an anomalous state, such as an internal short circuit or excess charge, gas is emitted within the batteries due to breakdown of the non-aqueous electrolyte, and pressure rapidly increases within the batteries. A non-aqueous electrolyte secondary battery according to the present invention comprises a cleavage valve (10) which cleaves at an internal pressure increase in order to avoid the battery casing breaking from the internal pressure increase. The cleavage valve (10) is configured from a valve body (11) and a ring member (12), and is installed in a through hole (3A) which is disposed in a cover plate (3). To avoid the cleavage valve (10) corroding, the through hole (3A) which is disposed in the cover plate (3) of the battery casing (1) is covered from within the battery casing with a corrosion avoidance foil (15) such that the cleavage valve (10) is covered. |
