酸化銀電池の電解液漏洩封止に関する研究 （第４報） 水素ガス発生抑止による封止法の開発

Abstract

Mixture of epoxy resin and asphalt was used as sealant, which existed between the gasket and anode can, in the silver oxide battery. Best mixing ratio among epoxy resin, hardener and asphalt was proposed, and two reasons that the mixture of epoxy resin and asphalt show good seal characteristics are shown in this experiment. One of the reasons is that the mixture worked as soft material between gasket and can to decrease the clearances. Another reason is that the creep of alkaline on copper surface is decreased by the effect of epoxy resin. It has been proven that the mixture of epoxy resin and asphalt has good characteristics for sealing alkaline electrolyte by the mass production batteries. Absorbing the diphenylcarbazide to anode can copper surface brought out good seal characteristics for the silver oxide batteries. In conclusion, the mechanism of leakage of the silver oxide battery is that the electrolyte invades into clearances between the seal consisted by gasket and anode can and it generated hydrogen gas on copper surface, which made gas hall and leak path. It has also been proven that decreasing hydrogen gas generation is one of the most important ways to get better sealing.