Charge and discharge pin for secondary battery and probe for charge and discharge test of secondary battery including charge and discharge pin

A probe for a charge and discharge test of a secondary battery, comprising:

• an outer plunger having a cylindrical geometry and including an internal through-passage;
• an inner plunger configured to move within the outer plunger;
• and
• a charge and discharge pin connected to the outer plunger and the inner plunger,
• wherein the charge and discharge pin comprises:
• a head part connected to the outer plunger and including a front end surface and an outer peripheral surface, the front end surface configured to be in contact with a terminal of the secondary battery and the outer peripheral surface extending from the front end surface;
• a coupling part connected to the inner plunger, disposed on the head part, and configured to be coupled to the terminal of the secondary battery;
• and
• an insulating member connected to the outer plunger and covering at least a portion of the outer peripheral surface of the head part.