| 摘要 |
PURPOSE: To prevent reduction in performance level of a battery at low temperature by forming a separator by use of a porous polypropylene film having prescribed dimensions. CONSTITUTION: An anode, a cathode, a separator and a nonaqueous electrolyte are housed within a sealed case, a pair of electric terminals are provided on the case so as to be insulated, and the anode and the cathode are connected to each terminal. The anode is formed of lithium foil, the cathode of manganese dioxide, and the separator of a porous polypropylene film. The polypropylene film has a thickness of about 1.5 mil and an internal porosity of about 60% by volume, and the anode, the cathode and the separator are spirally wound together and formed in to a jelly roll. |
