| 摘要 |
PROBLEM TO BE SOLVED: To provide a lithium battery which is small in internal resistance and capable of maintaining an adequate voltage until the end stage of discharge while avoiding the decrease in discharge capacity owing to the depletion of lithium and other problems.SOLUTION: A spiral type lithium battery 1a comprises: a belt-shaped electrode body 10 having a negative electrode 4 including lithium metal or a lithium alloy as a negative electrode active material and a positive electrode 3 opposed to the negative electrode through a separator 5; a nonaqueous organic electrolyte 30; and a bottomed cylindrical battery can 2 doubling as a negative electrode current collector, in which the belt-shaped electrode body in the state of being wound in its longitudinal direction and the nonaqueous organic electrolyte are enclosed hermetically. Supposing that a direction of extension of a cylinder axis 50 of the battery can is an up-and-down direction, the up-and-down direction makes a winding axis 50 of the electrode body; the belt-shaped electrode body is wound so that the winding axis makes the start of the winding, and the negative electrode is disposed on the outermost circumference. To the outer circumferential surface of the negative electrode, a conductor 40 continuing from the end of the winding to a region opposed to an inner face of the positive electrode on the side of the end of the winding in the longitudinal direction of the electrode body is stuck.SELECTED DRAWING: Figure 4 |
