| 摘要 |
PURPOSE:To obtain a thermal battery whose self-discharge is eliminated and operation at high temperature is capable by using yttria fibers as heat-insulating material in a thermal battery in which lithium or lithium alloy is used as a negative eletrode. CONSTITUTION:A unit cell 1 consists of a three-layer pellet of a negative electrode, electrolyte, and a positive electrode. The unit cells are mutually stacked with heat generating agents 2. The negative electrode layer is composed of lighium-aluminium alloy, the electrolyte layer is composed of the mixture of LiCl-KCl eutectic salt and magnesia powder, and the positive electrode layer is mainly composed of iron disulfide. When current is instantly applied to an ignition terminal 6, an ignition unit 5 is ignited, then the heat generating agents 2 are burned to activate the battery. Yttria fibers are used as heat insulating material 7 which insulates heat of the battery. Yttria is stable to lithium alloy and the heat insulating ability is increased by forming it to fibrous form. |
