Center pin for secondary battery and secondary battery having the same

摘要

A center pin for a secondary battery and a secondary battery having the same, which optimizes a void volume of the secondary battery. The center pin is inserted into an electrode assembly of the secondary battery. The center pin has a longitudinal hole and includes a sealing member to seal a portion of the hole. The sealing member can include walls disposed within the center pin, to seal the portion of the hole. The sealing member can include a second center pin, which is inserted into the hole, to seal the portion of the hole.

主权项

1. A center pin assembly for a secondary battery, comprising:
a first center pin having a longitudinal hole; and a second center pin disposed in the hole, to reduce the inner volume of the hole, and defining a gap between the first and second center pins, the gap having a uniform cross-sectional area over an entire length of the second center pin.