| 摘要 |
PROBLEM TO BE SOLVED: To provide a secondary cell of which a gas exhausting valve is not corroded by the contact with the electrolyte, surely opening a gas exhausting path with a prescribed operation pressure, enabled to prevent an abnormal rise of pressure inside a cell case. SOLUTION: An electrode 4 as an electricity generating element, is housed inside a cell case 1 composed of a cylindrical body 11 with a lid 12 at its opening. A through hole 85 is formed to the lid 12, and a gas exhausting valve 8 with a valve membrane 80, opening when the inner pressure of the cell case 1 exceeds a prescribed value, is mounted to the through hole 85, and a resin plate 7, blocking the through hole 85, is put outside the gas exhausting valve 8, and the resin plate 7 opens a gas exhausting path by receiving the pressure lower than the operation pressure of the gas exhausting valve 8. |
