Lg Energy Solution, Ltd.

Lg Chem, Ltd

Cheil Industries Inc.

Sk Innovation Co., Ltd.

Seok Jin Kim

Sang Hyun Koo

Jung Hoon Lee

Tu Won Chang

Young Ki Lee

Sung Hyun Kim

Cha Hun Ku

Min Su Kim

Sung Min Hwang

Su Taek Jung

Kil Sung Lee

Jae Seok Lee

Sang Kyun Lee

Ji Hoon Lee

Cha-Hun Ku

Hyun Geun Jo

Jung Kwan Pyo

Ki Hong Min

Tai Jin Jung

Gi Su Park

Jihoon Cho

Byeong Geun Kim

Changmin Han

Sang Hyuck Park

Ki Hun Song

Han Sung Lee

Chang Min Han

Jeong Sam Son

Duck Hoe Kim

Ju Hyeon Cho

Taeyoon Jung

Tae Yoon Jung

Woon Ki Chung

Sang Min Kwon

Tae Keun Lee

Hyun-Sook Baik

The present invention provides an apparatus for inspecting a welding state in a welded portion for an electronic or mechanical coupling in a lithium secondary battery, the apparatus including: a measuring unit configured to obtain data for deriving a resistance value of the welded portion by allowing a resistance measuring probe to contact the welded portion; and a controller configured to communicate with the measuring unit, determine the resistance value of the welded portion by receiving the data obtained from the measuring unit, and determine whether a weak welding was performed by comparing the determined resistance value with a threshold resistance value, in which the measuring unit is configured to allow the resistance measuring probe to contact one end and the other end of the welded portion.

Welding quality inspection device

A method for inspecting a welding defect of the present invention includes: a threshold resistance setting step (S) of measuring a resistance of a welded portion of a sample group and deriving a threshold resistance value which becomes an evaluation standard of a weak welding; a resistance measuring step (S) of measuring a resistance value of a welded portion to be inspected; and a step (S) of determining as a weak welding if the resistance value measured in the resistance measuring step exceeds the threshold resistance value, wherein the threshold resistance setting step (S) and the resistance measuring step (S) include measuring a resistance using a microresistance measuring instrument having a resolution of nanoohm to microohm units. The welding defect inspection method of the present invention shows excellent detection power for the welding defect by a weak welding.

Welding failure inspection method

An eddy current sensor for deriving an eddy current and sensing the derived eddy current in order to detect a crack in a battery cell, the eddy current sensor comprises: a core unit in which a coil is wound around a magnetic member; and a case for accommodating the core unit of which there are at least two, which are arranged so that the central axis of the coil is oriented in the thickness direction of the battery cell.

Eddy current sensor having improved crack detection capability, and eddy current inspection device including same

A device for detecting a crack in a battery cell, comprising: an inspection unit comprising a first sensor inducing an eddy current and a second sensor sensing a signal of the eddy current induced by the first sensor, and performing an inspection of the battery by using the eddy current while the battery cell is driven; a transfer unit for sequentially transferring a plurality of battery cells from a point where the battery cells are introduced to a point where the battery cells are taken out; and a control unit which is electrically connected to the inspection unit and receives, evaluates, and controls the eddy current signal sensed by the inspection unit.

Inspection method for crack in battery cell by using eddy current, and inspection device

The present invention relates to an electrolyte removing device. The electrolyte removing device comprises: a jig assembly configured to receive in a seated position a pouch comprising an accommodation part in which an electrode assembly is accommodated, a gas pocket part, and a connection part connecting the accommodation part to the gas pocket part; and an electrolyte removing assembly configured to push an electrolyte remaining on the connection part to the gas pocket part to remove the electrolyte from the connection part.

Electrolyte removing device, apparatus and method for manufacturing secondary battery comprising the same, and secondary battery

The present invention provides a method for manufacturing an electrode assembly, comprising: interposing a plurality of first electrodes one by one, which are spaced apart from each other, between two separators; stacking a second electrode on each of outer surfaces of the separators on each of both sides of the first electrode at positions that are skipped by one of the plurality of positions on which the first electrodes are disposed to alternately continuously form a bi-cell, in which the second electrode/the separator/the first electrode/the separator/the second electrode are sequentially stacked, and a half-cell, in which the separator/the first electrode/the separator are sequentially stacked; cutting the stack into a unit cell in which one bi-cell and one half-cell are connected to each other; folding the unit cell so that the bi-cell and the half-cell are stacked; and stacking a plurality of folded unit cells to manufacture the electrode assembly.

Electrode assembly and method for manufacturing the same

The present invention relates to an electrode, for reducing a difference in ductility between a non-coating portion and a coating portion of the electrode, a method for manufacturing the electrode, and a roller for manufacturing the electrode. Also, the electrode according to the present invention includes an electrode foil, a coating portion coated with an electrode active material on one surface of the electrode foil, and a non-coating portion which is disposed adjacent to the coating portion on the one surface of the electrode foil, and is not coated with the electrode active material and on which a pattern is disposed.

Electrode, method for manufacturing the electrode, and roller for manufacturing the electrode

A jig device for inspecting quality of a secondary battery, which fixes the secondary battery and inspects quality of the secondary battery, is provided in which the jig device includes a jig base having a seating hole, a fixed module mounted on the jig base at one side of the seating hole, a first gliding module mounted on the jig base at a side opposite to the fixed module and glidable toward the fixed module, and a support part extending across the seating hole. A masking block is mounted on one or more portions of the fixed module and the first gliding module, which comes into contact with an edge of the secondary battery to fix the secondary battery. The first gliding module is detachable from the jig base, and the support part is separable from the fixed module and the first gliding module.

Jig device for inspecting quality of secondary battery

A non-destructive inspection judgment system for inspecting a non-destructive inspection subject using ultrasonic waves, including an ultrasonic wave generator transmitting and receiving ultrasonic signals by generating ultrasonic waves to the non-destructive inspection subject placed on an inspection table, an interface transmitting an ultrasonic signal received from the ultrasonic wave generator to an ultrasonic wave generation data controller, the ultrasonic wave generation data controller processing ultrasonic wave data received from the interface, a sealing defect presence judger determining, using the processed ultrasonic wave data, whether a sealing defect is present, and a display displaying a result of the judgment on a monitor to detect an unsealed portion of an aluminum pouch.

System for non-destructively inspecting and determining sealing of aluminum pouch by using ultrasonic waves

An electrode assembly for a secondary battery having reduced internal resistance while adhesion between a separator and an electrode is maintained and having improved electrolyte impregnation the electrode assembly including a separator having a processed area having undergone a corona discharging process and a non-processed area.

Electrode assembly including electrode and separator partially bonded to each other

Disclosed herein are a secondary battery transfer apparatus for transferring a secondary battery in a secondary battery manufacturing process and a method for detecting a loading defect of a secondary battery in a carrier receiving the secondary battery. The secondary battery transfer apparatus includes a carrier having a receipt space to receive a secondary battery, a transfer unit transferring the carrier, a loading detection sensor sensing the secondary battery when the secondary battery inserted into the carrier reaches a designated height, and a controller receiving a result of sensing of the loading detection sensor and controlling operation of the transfer unit. The secondary battery transfer apparatus and the detection method detect whether or not a case of the secondary battery is damaged due to friction with the carrier and thus recognize a product defect in advance.

Secondary battery transfer device and method for detecting receipt failure of secondary battery

The present invention relates to a polyolefin composition for an interior sheet/film. The polyolefin composition of the present invention for an interior sheet comprises 70 to 99 wt % of polyolefin and 1 to 30 wt % of modified polyethylene terephthalate having a melting point of 130 to 180&#xb0; C. The polyolefin composition of the present invention is environmentally friendly and has good physical properties such as workability, printing characteristics, and adhesiveness. In addition, sheets having various thicknesses can be produced by extrusion without having to stretch the sheets, and thus the sheets can be used separately or in combination in various application fields.

Polyolefin composition for an interior sheet/film

There is disclosed a process for preparing a metal oxide CMP slurry suitable for semiconductor devices, wherein a mixture comprising 1 to 50 weight % of a metal oxide and 50 to 99 weight % of water is mixed in a pre-mixing tank, transferred to a dispersion chamber with the aid of a transfer pump, allowed to have a flow rate of not less than 100 m/sec by pressurization with a high pressure pump, and subjected to counter collision for dispersion through two orifices in the dispersion chamber. The slurry has particles which are narrow in particle size distribution, showing an ultrafine size ranging from 30 to 500 nm. Also, the slurry is not polluted at all during its preparation and shows no tailing phenomena, so that it is preventive of &mgr;-scratching. Therefore, it can be used in the planarization for shallow trench isolation, interlayer dielectrics and inter metal dielectrics through a CMP process.

Process for preparing metal oxide slurry suitable for semiconductor chemical mechanical polishing

The present invention relates to a polishing composition comprising 30 to 99 wt % of deionized water, 0.1 to 50 wt % of powder of metallic oxide and 0.01 to 20 wt % of cyclic amine. This polishing composition can be used in a chemical mechanical polishing of thin films in integrated circuit manufacturing and has an effect of minimizing the occurrence of microscratches on the thin film after polishing. Thereby it can be applied to the manufacturing process of highly integrated circuits such as Shallow Trench Isolation.

Polishing composition

Disclosed is a polishing composition which comprises an Al O /SiO composite-based metal oxide powder, deionized water and an additive, said metal oxide powder comprising an Al O /SiO composite as an essential component. The polishing composition is superior in removal rate and free of causing microscratches after polishing and thus, suitable for use in the global planarization of device wafer surfaces.

Growing community of inventors

Daejeon, South Korea

Seok Jin Kim