Lg Chem, Ltd

Lg Energy Solution, Ltd.

Sung Pil Yoon

Jin Soo Lee

Joo Hwan Sung

Seong Min Kim

Hae Jin Lim

Ju Bin Kim

Jung Koo Kang

Seunghe Woo

Sang Hoon Choy

Ki Woong Kim

Dong Myung Kim

Jae Han Jung

Woo Ha Kim

Jeong Min Kim

Yu Na Jeong

In Seong Kim

Eun Sun Choi

Young San Bae

Sung Han Jung

Seong Keun Jang

Won Pyo Chae

Da Woon Jeong

The present technology relates to a manufacturing method for an electrode binder, comprising a step of dissolving pelletized polyvinylidene fluoride (PVDF) in a solvent; and an electrode assembly comprising the electrode binder. The present invention may provide an electrode assembly which has a low content of impurities in a binder solution, is capable of increasing dispersibility of an electrode active material, and exhibits excellent binding force.

Manufacturing method for electrode binder and electrode assembly comprising same electrode binder

A cylindrical secondary battery includes an electrode assembly having a positive electrode/separator/negative electrode structure positioned in a cylindrical battery can. The cylindrical secondary battery comprises: a first insulating layer mounted at the upper end of the electrode assembly and having a first through hole through which the electrode tab penetrates, and a second insulating layer mounted at the upper end of the first insulating layer and having a second through hole formed to align with a central axis of the electrode assembly. A method of manufacturing the cylindrical secondary battery is also provided.

Cylindrical secondary battery and manufacturing method thereof

The present invention relates to an electrode assembly in which a plurality of electrode units are stacked to improve product stability when manufactured and a method for manufacturing the same. In addition, the present invention is provided to include a plurality of electrode units on which electrode tabs are formed and a full length-side separator member folded in a direction in which the electrode tabs are formed and a direction opposite to the direction in which the electrode tabs are formed while stacking the plurality of electrode units to be separated from each other.

Electrode assembly and method for manufacturing the same

Disclosed is a secondary battery including a current blocking device. According to the present invention, the secondary battery in which when the secondary battery increases in volume due to overcharging, current flowing to the secondary battery is interrupted by using expansion force due to the increase in volume to improve safety and reliability may be manufactured.

Secondary battery

The present disclosure provides a battery cell charging and discharging apparatus configured to charge and discharge a battery cell which is sealed in a state in which an electrode assembly is embedded in a battery case and includes a first die plate having a first charging pin which is connected to a first electrode terminal of the battery cell by being contacted thereto during a charging and discharging process of the battery cell. The first die plate includes an insulation mask of an electrical insulation material formed in a structure covering a remaining part of the battery cell excluding the first electrode terminal at a position corresponding to the first charging pin and mask fixing portions configured to fix both sides of the insulation mask so that a position of the insulation mask is set.

Apparatus for charging and discharging battery cell comprising insulation mask

Disclosed herein is a battery cell configured to have a structure in which an electrode assembly, including positive electrodes and negative electrodes stacked in the state in which separators are disposed respectively between the positive electrodes and the negative electrodes, is mounted in a cell case in the state in which the electrode assembly is impregnated with an electrolyte, wherein the electrode assembly and the cell case are deformable in response to the shape of a device in which the battery cell is mounted, and anti-wrinkle members, for preventing wrinkles from being formed in the cell case when the cell case is deformed, are added to at least portions of the outer surfaces of the electrode assembly.

Battery cell having anti-wrinkle member

The present invention relates to a jelly-roll type electrode assembly comprising: a sheet-like positive electrode; a sheet-like negative electrode; and a separator which is interposed between the positive electrode and the negative electrode, and which includes a first adhesive coating part and a second adhesive coating part formed on a first surface of a sheet-like porous substrate, and a third adhesive coating part formed on a second surface which is the opposite surface to the first surface, wherein the first adhesive coating part and the second adhesive coating part have different tack strength from each other.

Separator comprising adhesive coating parts having different tack strengths and electrode assembly comprising the same

Disclosed herein is a battery cell having an electrode assembly including one or more unit cells mounted in a variable cell case in a state in which the electrode assembly is impregnated with an electrolyte, wherein at least one of the unit cells includes a flexible electrode that can be bent or curved, an electrode current collector of the flexible electrode includes a first surface, to which an electrode active material is applied, and a second surface, to which no electrode active material is applied, the second surface being opposite to the first surface, and the second surface is provided with a mesh for improving flexibility of the electrode.

Flexible battery cell

Disclosed herein is a battery case made of a laminate sheet including an outer coating layer made of a weather-resistant polymer, an inner sealant layer made of a thermally bondable polymer, and a barrier layer interposed between the outer coating layer and the inner sealant layer, wherein an electrode assembly configured to be bent or curved in conformity with the shape of a device, in which a battery cell is mounted, is received in the battery case, and a pattern is formed on at least one surface of the battery case that faces an outer surface of the electrode assembly.

Battery case having anti-wrinkle pattern

Disclosed herein is a battery cell having an electrode assembly mounted in a variable cell case in a state in which the electrode assembly is impregnated with an electrolyte, the battery cell being configured to be flexibly deformed in response to the shape of a device, in which the battery cell is mounted, wherein an uppermost end electrode and/or a lowermost end electrode of the electrode assembly in the direction in which electrodes are stacked is provided on an electrode current collector thereof, facing the inner surface of the cell case, with an electrode mixture including inert particles, 10 to 100% of the inert particles being distributed on the surface of the electrode mixture such that a concave-convex structure is formed in the surface of the electrode mixture in vertical section.

Battery cell with safety improved using inert particles

Disclosed herein is a battery cell having an electrode assembly mounted in a variable cell case in a state in which the electrode assembly is impregnated with an electrolyte, the battery cell being configured to be flexibly deformed in response to the shape of a device, in which the battery cell is mounted, wherein a coating part including inert particles is formed on at least one outer surface of the electrode assembly.

Battery cell including electrode assembly coated with inert particles

Disclosed herein is a battery cell configured such that an electrode assembly having a positive electrode/separator/negative electrode structure is received in an electrode assembly receiving part formed in a pouch-type battery case in a sealed state together with an electrolyte, wherein the battery case is provided with sealed parts, formed by thermally welding the outer edge of the battery case in the state in which the electrode assembly is received in the battery case together with the electrolyte, one or more recesses are formed in opposite side sealed parts adjacent to an upper end sealed part, at which electrode terminals are located, and/or a lower end sealed part in a state in which the recesses are formed from outsides of the side sealed parts toward a vertical middle axis of the battery cell so as to prevent wrinkles from being formed in the sealed parts of the battery case when the battery cell is bent, and portions of the side sealed parts in which the recesses are located are sealed at a higher sealing temperature than the remaining portions of the side sealed parts.

Growing community of inventors

Daejeon, South Korea

Sung Pil Yoon