| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent internal short circuit due to a foreign matter entering from a gap between a positive electrode and a separator in a cylindrical secondary battery. <P>SOLUTION: An electrode group 10 including a positive electrode 11, a negative electrode 12, and a first and a second separator 13 and 14 wound around an axis core 15 is housed in a battery can 2. A nonaqueous electrolyte 5 is injected from the upper part side of a hollow part 15d of the axis core 15. When the nonaqueous electrolyte 5 flows sequentially in a direction of L1 to L4, while a flowing conductive foreign matter mixed in the nonaqueous electrolyte 5 is blocked by insulation tapes 51A and 51B and is sealed on the bottom part side on the battery can 2. <P>COPYRIGHT: (C)2012,JPO&INPIT |
