| 摘要 |
PURPOSE: An ultrasonic welding device is provided to improve the welding strength of a cathode welding junction surface, thereby preventing damage to a joint of a cathode tab and a cathode lead. CONSTITUTION: An ultrasonic welding device comprises an anode horn(140a) and a cathode horn(140b). The anode horn transmits ultrasonic wave by pressing an anode lead and an anode tab with a pressing surface formed on an end thereof. The cathode horn is formed with a pressing surface on an end thereof, having a higher density than that of the anode horn, and transmits ultrasonic waves by pressing a cathode lead and a cathode tab with the pressing surface. The cathode horn and the anode horn include a plurality of contact members for transmitting ultrasonic waves to an electrode lead. The number of the contact members included in the cathode horn is greater than the number of the contact members included in the anode horn. [Reference numerals] (110) Ultrasonic oscillator |
