WELDING QUALITY INSPECTION DEVICE AND WELDING QUALITY INSPECTION METHOD

The present specification relates to a welding quality inspection apparatus for a welding portion of a secondary battery, and provides a welding quality inspection apparatus including: a measurement unit including a first resistance measurement member measuring a resistance value by directing contacting a first measurement point and a second resistance measurement member measuring the resistance value by directly contacting a second measurement point; and a control unit judges that a welding defect occurs and sorts a defective item when the resistance values obtained from the measurement unit exceeds a threshold resistance value, in which the first measurement point is positioned on a first electrode terminal exposed to the outside of the secondary battery, the second measurement point is positioned on the welding portion of the first electrode current collector provided inside the secondary battery, and the second resistance measurement member contacts the welding portion of the first electrode current collector which exists inside the secondary battery through a winding hole of the electrode assembly opposite to the first electrode terminal.