WELDING QUALITY INSPECTION DEVICE AND WELDING QUALITY INSPECTION METHOD

Discussed is a welding quality inspection apparatus that can include a measurement unit including a first resistance measurement member to measure a first resistance value by directly contacting a first measurement point and a second resistance measurement member to measure a second resistance value by directly contacting a second measurement point; and a control unit to judge that a welding defect occurs and sorts a defective item when the first resistance value or the second resistance value obtained from the measurement unit exceeds a threshold resistance value. The first measurement point may be positioned on a first electrode terminal exposed to an outside of the secondary battery, and the second measurement point may be positioned on the welding portion of the first electrode current collector provided inside the secondary battery.