| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an alkaline secondary battery in which cycle characteristics are improved by suppressing capacity deterioration due to charging/discharging cycles. <P>SOLUTION: In the alkaline secondary battery 100, a battery can 11 is sealed by a sealing member 20 by disposing a hollow cylindrical positive electrode mixture agent 12 having an outer diameter B and an inner diameter D in the can 11 made of a metal with a bottomed cylindrical state, and disposing a negative electrode mixture agent 14 at the center of the agent 12 via a separator 13 of a bottomed cylindrical state. Further, in the battery, a washer 21 having an outer diameter A and an inner diameter C is provided on the end face of the can 11 of the agent 12 at an opening side. The outer diameter A of the washer 21 is the outer diameter B or less of the agent 12, in a range of B-0.2 mm or more (that is, B≥A≥B-0.2 mm), and the diameter C is a range of the inner diameter D or more of the agent 12, D+2 mm or less (that is, D≤C≤D+2 mm). Thus, moisture generated at a charging time positive electrode is extruded from the positive electrode to the negative electrode, the expansion of the positive electrode by the moisture is suppressed, and the alkaline secondary battery having the excellent cycle characteristics can be obtained. <P>COPYRIGHT: (C)2004,JPO |
