Capacitor discharge spot welding is a processing method that instantly discharges electrical energy stored in a capacitor, melting and joining metals using the resistance heat generated by that large current. Because a large current flows for an extremely short time, the heat impact on the base material is minimal, and thermal distortion and discoloration can be minimized. Due to these characteristics, it is particularly suitable for precision welding of thin sheet metals, dissimilar metals, and highly conductive materials (such as copper and brass). It is widely utilized in fields requiring high quality and precision, such as joining battery tabs, welding lead wires of electronic components, and for medical devices and small motor parts, providing stable welding quality and productivity.