| 摘要 |
PURPOSE:To stabilize vent operation and prevent electrolyte leakage to increase reliability by constituting a sheet-like vent so as to be difficult to contact the inside wall of an outer box, and arranging a porous body between the surface of an electrode and the outer box. CONSTITUTION:A sheet-like spacer 8 is placed around a sheet-like vent 7. A part, where the vent 7 contacts, of the inside wall of an outer box is recessed so that the vent 7 is difficult to contact the inside wall to reduce vent opening pressure and stabilize vent operation. The spacer 8 is provided with electrolyte absorbing capability, and a sheet-like porous body having water repellent capability is arranged between an outer jacket to which the vent 7 is sticked and an electrode to prevent electrolyte leakage. Thereby, since vent operation is stabilized and electrolyte leakage is prevented, reliability is increased. |
