Lg Energy Solution, Ltd.

Lg Chem, Ltd

Su Hyun Yun

Ki Woong Kim

Bum Young Jung

Jung Shik Oh

Kyung Min Kim

Han Young Lee

Kyoung Won Kang

Suk Woo Lee

Dong Sik Yoon

Hyo Sun An

An apparatus and method for inspecting lithium precipitation may form a magnetic field around a battery cell to be inspected to induce an eddy current and may compare measured impedance of the battery cell with standard data to detect lithium plating in the battery cell, thereby providing high stability and reliability.

Device and method for inspecting lithium precipitation in battery cell

A method for manufacturing an electrode assembly according to an embodiment of the present invention may include applying a positive electrode active material to at least a portion of a positive electrode collector, applying a negative electrode active material to at least a portion of a negative electrode collector, The method may include interposing a separator between a positive electrode and a negative electrode, and respectively removing a positive electrode insulating layer and a negative electrode insulating layer from at least partial areas of a positive electrode tab, which is not coated with the positive electrode active material, and an negative electrode tab, which is not coated with the negative electrode active material in the negative electrode collector. The method may include connecting a positive electrode lead and a negative electrode lead to the positive electrode tab and the negative electrode tab, respectively.

Electrode assembly and method for manufacturing the same

A method of detecting a lamination defect of an electrode assembly in the initial stage, including: forming an insulating member having a predetermined width and a predetermined height in an overhang region of one end or two ends of one surface of a negative electrode; manufacturing an electrode assembly by sequentially laminating a separator and a positive electrode on one surface of the negative electrode; and determining whether there is a lamination defect in the electrode assembly by measuring a thickness of the electrode assembly. Also provided are an electrode assembly including an insulating member, and a battery cell including the electrode assembly.

Electrode assembly stacking fault detection method, electrode assembly including insulating member, and battery cell including same

A secondary battery comprises an electrode assembly comprising radical units in which first and second electrodes are alternately laminated with a separator therebetween and a separation film surrounding the radical units to be repeatedly laminated, wherein the electrode assembly comprises a protection unit laminated on an outermost separation film disposed on the uppermost end or lowermost end of the separation film, the protection unit has a structure comprising a second protection electrode, a separator, and a first protection electrode which are successively laminated from the outermost separation film disposed on the uppermost end or lowermost end of the electrode assembly, the second protection electrode has a cross-sectional coating structure comprising a second collector and a second electrode active material portion coated with a second electrode active material on an inner surface of the second collector, and the inner surface is a surface facing a center of the electrode assembly.

Secondary battery

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Daejeon, South Korea

Su Hyun Yun