| 摘要 |
PURPOSE:To obtain a unit cell for thin thermal battery having no insulating defect by press-molding together three layers of negative raw material, electrolyte raw material, and positive raw material to form a disc-shaped pellet, and grinding the periphery of the pellet so as to have a trapezoid cross section. CONSTITUTION:Three layers of a negative layer 1, an electrolyte layer 2, and a positive layer 3 are press-molded together to form a disc-shaped pellet. The periphery of the pellet is ground so as to have a trapezoid cross section. By friction against a cylinder wall of a die, the periphery of the negative layer 1 is pulled up and may bring into contact with the positive layer 3 or by shortening the distance between the negative layer and the positive layer, insulating resistance is decreased. To prevent this defect, grinding of the lower part of the pellet is not necessary and the amount of grinding is increased toward the upper direction. By grinding the periphery of the pellet so as to have a trapezoid cross section, the insulating defect of a unit cell is decreased regardless of the minimum amount of grinding. |
