| 摘要 |
<p>PURPOSE: A center pin of a secondary battery and a secondary battery having the same are provided to minimize a void volume of a secondary battery by enabling a secondary battery equipped with first center pins to have the volume of a specified range. CONSTITUTION: A center pin(120) of a secondary battery has holes in a longitudinal direction and includes a sealing member(125) for sealing a constant area of hole(122). The sealing member is placed in the inner side of hole. The constant area of the hole is 30% ~ 90% of the whole volume. The volume excluding the constant area of the hall is 0.019mL ~ 0.140mL. The sealing member is a polymer resin.</p> |
