2000 年 66 巻 6 号 p. 922-926
Experimental estimation is carried out on the clearance between anode can and gasket of silver oxide battery. Although the qualitative evaluation of electrolyte leakage of silver oxide batteries is given by IEC standard, it presents no quantity of leaked electrolyte but outside appearance. In this paper, flame analysis is carried out the typical samples of each grades of IEC standard for watch batteries, and the relationship between each grade of IEC standard and quantity of leaked electrolyte is given. Leak speed of electrolyte is estimated by the experimental data on alkaline creeping for the copper electrode. On account of these data, cross section area of leak path in the boundary zone between anode can and gasket is estimated. The clearance varies as time elapses, so its behavior is investigated in the valuation of leakage for silver oxide batteries under high temperature and high humidity surroundings. In conclusion, variation of clearance or of leak speed of electrolyte is an important parameter for better sealing.