Lg Energy Solution, Ltd.

Jeong Yeon Kim

Cha Hun Ku

Su Taek Jung

Young Seok Baek

Sang Ho Bae

Chang Min Han

Jin Yong Lee

Jae Hwa Choi

Hun Bum Jung

Ji Hun Hwang

Jung Joo Kim

Seong Jin Kim

An ultrasonic welding device for a secondary battery is provided. The ultrasonic welding device is configured to weld an overlapping surface of an electrode tab and an electrode lead in an electrode assembly. The ultrasonic welding device includes an anvil on which the overlapping surface of the electrode tab and the electrode lead are disposed. A horn is configured to apply ultrasonic waves to the overlapping surface of the electrode tab and the electrode lead while pressing the overlapping surface. The overlapping surface is disposed on the anvil. An electrode tab measuring part is configured to measure a thickness of the electrode tab disposed on the overlapping surface. A pressure adjusting device is configured to adjust a pressure applied to the overlapping surface by the anvil and the horn according to the thickness value of the electrode tab. The thickness value is measured by the electrode tab measuring part.

Ultrasonic welding device and welding method for secondary battery

A welding pressure control system includes: an anvil on which a welding subject is supported; a horn that presses the welding subject; an elevating unit that supports the horn to be ascendable and descendable; a sensing unit that senses a pressure value varying depending on the ascent and the descent of the horn; and a control unit that controls the elevating unit based on the pressure value obtained from the sensing unit. The elevating unit includes a motor, a screw that receives driving power from a rotary axis of the motor and rotates, a vertically movable part that is coupled to the screw and moves vertically during the rotation of the screw, and a support that is coupled to the vertically movable part and supports the horn. The sensor is disposed circumferentially about the screw and pressed according to the vertical movement of the vertically movable part.

Welding pressure control system, welding pressure control method using the same, and welding subject thickness measuring method using the same

An ultrasonic welding device includes an anvil provided so that an overlapping surface of an electrode tab and an electrode lead, which are provided in an electrode assembly, are configured to be disposed thereon; a horn configured to weld the overlapping surface disposed on the anvil; and an inspection member configured to inspect a horizontal level of an opposing member with respect to the overlapping surface, based on an overlapping surface horizontal value that is a horizontal value of the overlapping surface with respect to a predetermined reference surface and an opposing horizontal value that is a horizontal value of the opposing member, which is one of a welding part of the horn configured to face the overlapping surface and a disposing part of the anvil, on which the overlapping surface is configured to be disposed, with respect to the predetermined reference surface.

Secondary battery and ultrasonic welding device and welding method for secondary battery

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Daejeon, South Korea

Jeong Yeon Kim