PURPOSE: To enable the complete blocking of the leak-out path of the electrolyte, by improving the fixing structure of the circumference of the air pipe to the positive pole case thereby integrally adhering said circumferential section to the positive case.
CONSTITUTION: The positive pole case 4 having the small diameter step section 5 at the bottom is made of an air taken-in hole 5a in the bottom face, where the liquid sucking member 6 for catching the leaked electrolyte is made of cotton while the water repellent film 7 is provided with the fine holes of several microns. The air pole 11 having the thickness of 0.5mm is composed of the catalytic member 9 or the mixed system of a metal oxide such as manganese dioxide and the conduction promoting agent, where it is mixed with the binder and pressure filled in a current collecting net 10 made of a corrosion-resistant metal then punched into a disc. The air pole 11 is inserted into the water repellent film 7 arranged at the inner bottom of the positive pole case 4, then a ring-shaped agent-soluble adhesive compound 12 is positioned at the circumferential section of the upper face and the agent is dripped to dissolve the adhesive compound to permeat into the catalyst thereafter the innercircumferential wall of the positive pole case 4 and the circumferential section of the air pole 11 are adhered integrally.
KOSHIBA NOBUHARU
YOKOYAMA TAKAO
OOTA AKIRA
MORITA KORENOBU
