| 摘要 |
PURPOSE:To impregnate the electrolyte fully into a matrix by degassing a fuel cell fully at a high temperature then feeding the electrolyte and maintaining the condition for a long time. CONSTITUTION:A fuel cell block 8 laminated with a plurality of unit cells is installed in a vacuum heating furnace 9 horizontally or at a slight inclination. The block 8 is heated to 70-120 deg.C under this condition, then the vacuum heating furnace 9 is degassed fully to the degree of vacuum of 5mm. Hg or less. This condition is maintained for a fixed time, then the electrolyte 11 heated to 70- 120 deg.C and vacuum degassed is gradually fed into the block 8 from an external heating tank 10 so as to fill the block 8 fully. Next, the atmosphere in the vacuum heating furnace is maintained at a vacuum and high temperature under the condition that the electrolyte is held in the block 8. Then, a valve 13 is opened under the condition that the atmosphere in the vacuum heating furnace 9 is kept at a vacuum and high temperature, and the electrolyte being held in the block 8 is discharged to an external tank 14 with the same degree of vacuum as that of the vacuum heating furnace 9. After the electrolyte has been fully discharged, the dry air is fed through a valve 15 so as to attain a normal pressure condition. |
