| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent an inconvenience that an end face edge of a center pin breaks a separator, etc. in crushing a nonaqueous secondary battery, by disposing the center pin at the center part of an electrode body in which a positive electrode and a negative electrode are wound through the separator and by devising the shape of the center pin. <P>SOLUTION: An inside of a battery can 5 has an electrode body in which a positive electrode 1 using a lithium containing complex oxide of which the open voltage in charging indicates 4 V or higher at a Li reference as a positive active substance and a negative electrode 2 using a carbon material of which the inter-surface distance (d002) of a (002) face of a crystal is 0.350 nm or shorter are wound in a spiral manner through a separator 3, and a hollow tubular center pin 16 is housed in the central cavity part of the electrode body. The center pin 16 is formed by machining a stainless steel sheet into a cylindrical form and both edge faces 16a, 16a of metallic material extending along with its axial direction are opposite to each other. In the vicinities of both end faces 16a, 16a, rounded corner parts 16b, 16b are disposed by folding back to machine both end faces 16a, 16a inward the center pin 16. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
