| 摘要 |
PURPOSE:To give a high accuracy to a safety valve and to reduce the number of process to install the valve body by arranging the valve body in a valve chest composed of the outer wall and the bottom wall, providing the safety valve to block a gas exhaust hole engraved at the bottom wall with its valve body, and fusing and holding the upper end of the outer wall of the safety valve to a sheet-form member. CONSTITUTION:A safety valve 4 composed separately from an electrode group and a battery jar main body is arranged in the cell chamber 2 of the battery jar main body 1, and the upper end surface of the outer wall 4a of the safety valve 4 is heating-fused and supported to the surface of a sheet-form member 3 to seal the opening surface of the battery jar main body 1. Since the safety valve is made as a separate device independent from the battery jar 1 in such a way, it can be positioned at a desired place in the cell chamber 2. Consequently, an accurate processing of the safety valve 4 can be easily carried out. and the assembly of the battery can be easily made. |
