Lg Chem, Ltd

Lg Chemical Ltd.

Jung Kyu Woo

Woo Yong Lee

Sung-Min Hwang

Jung-Hwan Kim

Hyang Mok Lee

Min Su Kim

Ju-Hwan Baek

Soo Min Park

Se Hyun Kim

Shin Hwa Lee

Tae Il Kim

Jeoung Hwan Kim

Eun Ju Kang

Heegyoung Kang

Sanggon Kim

Hong Seok Shim

Kyoung-Won Kang

Kyong Won Kang

Jae Kyung Oh

Kichul Hong

Yeong Tae Gwon

Disclosed herein are a method for welding electrode taps of a secondary battery which improves insulation defects generated during welding between the electrode taps and lead parts and an electrode assembly manufactured thereby. The method for welding electrode taps includes performing main welding to connect electrode taps protruded from electrode plates provided in a battery and lead parts electrically connecting the electrode taps to external terminals and having a lead film on the surfaces thereof and, in main welding, a welding part is formed in a partial section of an overlapping region between the electrode tap and the lead part, and a non-welding section is formed between the welding part and the lead film.

Method for welding electrode tab of secondary battery and electrode assembly manufactured using same

Provided is a method of manufacturing a secondary battery, in which scattering of an electrolyte is prevented while a degassing process is performed to prevent a product from being contaminated due to the scattering of the electrolyte. The method of manufacturing the secondary battery includes performing a formation process on a battery cell including a dead space to generate a gas within the battery cell, closing a piercing tool of a gas removing device to form a through hole in the dead space, thereby discharging the gas within the battery cell through the piercing tool, closing a sealing tool of the gas removing device after the gas is discharged to thermally bond an inner portion of the dead space that is adjacent to an electrode assembly within the battery cell, opening the piercing tool in the state where the sealing tool is closed, and opening the sealing tool after the piercing tool is opened.

Method of manufacturing secondary battery

Provided is a pouch type case, which includes a pouch type body part including an inner space for accommodating an electrode assembly, and an injection part extending from the body part to guide electrolyte into the inner space. The injection part is corrugated in a zigzag shape.

Pouch type case, battery cell, and method of manufacturing battery cell

The present invention relates to an air micrometer. The air micrometer includes a target object accommodation slot having a bottom surface and a ceiling surface to accommodate at least one portion of the target object between the bottom surface and the ceiling surface, and an air spray unit including a nozzle opened in the bottom surface or the ceiling surface to spray the air onto the target object that is accommodated between the bottom surface and the ceiling surface.

Air micrometer

Provided is a secondary battery electrolyte having improved high temperature properties and overcharge-prevention properties, particularly improved overcharge-prevention properties under high voltage/high current conditions, in conjunction with a minimized deterioration of the battery performance, by adding 3 to 5% by weight of cyclohexyl benzene (CHB) and 0.2 to 1.5% by weight of 2-fluoro biphenyl (2-FBP) as overcharge-preventing additives to an electrolyte of a lithium secondary battery.

Electrolyte of high temperature property and overcharge-prevention property and secondary battery employed with the same

Provided is a lithium secondary battery comprising a lithium transition metal compound-containing cathode and a graphitized carbon-containing anode with addition of a surfactant to the cathode and/or the anode, whereby the addition of the surfactant improves the wettability of an electrolyte on the electrode, thereby increasing the battery capacity and improving rate properties and cycle properties of the battery, in conjunction with a significant reduction of a manufacturing process time of the battery.

Lithium secondary battery comprising electrode active material containing surfactant

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Daejeon, South Korea

Jung Kyu Woo