Lg Chem, Ltd

Ki Hong Min

Jihoon Cho

Byeong Geun Kim

Changmin Han

Sang Hyuck Park

Ki Hun Song

Han Sung Lee

Sung Min Hwang

Su Taek Jung

Hyun-sook Baik

Jeong Sam Son

Hyeong Jin Kim

Jae Hoon You

Taeyoon Jung

Seok Joo Jung

Sung Hyun Kim

Jin Ho Ban

Byung Taek Yang

Sung-Min Hwang

Chang Bum Ahn

Seung Ho Na

Jin Soo Lee

Bu Gon Shin

Ji Won Park

Sungjin Kwon

Myung Hoon Ko

Kiwoong Kim

Tae Su Kim

Seok Jin Kim

Dae Han Seo

Young Joo Yang

Hyun-Chul Jung

Ki Eun Sung

Dongmyung Kim

JeongSam Son

Hyeong Joon Kim

Young Min Yuk

Tae-Yoon Jung

Hyun Suk Baik

TaeYoon Jung

Sang Ik Lee

Hyun-Sook Baik

Jeongsam Son

Provided is a pouch type secondary battery including an electrode assembly accommodated in an accommodating part of a pouch exterior part. A vertex part of an inner surface of the accommodating part is rounded. The electrode assembly includes a unit stack part that has a structure (a) in which a type of radical units are repeatedly disposed, wherein electrodes and separators are alternately disposed and are integrally coupled in the radical units, and the number of the electrodes is the same as the number of the separators, or a structure (b) in which two or more types of radical units are disposed in a predetermined order, wherein electrodes and separators are alternately disposed and are integrally coupled in the radical units, and the number of the electrodes is the same as the number of the separators. Distal ends of neighboring ones of the separators are not adhered to each other.

Pouch type secondary battery

Disclosed is a device for notching, at an interval of a unit electrode, a continuous electrode sheet in which an electrode active material is applied to one or both surfaces thereof, to form a plurality of unit electrodes from the electrode sheet, the device including a press to press notches on the top and the bottom of the electrode sheet at a set position, and two or more grippers arranged at the rear of the press based on a feed direction of the electrode sheet, the grippers drawing and transporting the electrode sheet by one pitch, a size corresponding to the unit electrode according to operation of the press, wherein while one of the grippers draws and transports the electrode sheet, the remaining grippers move to a position for drawing.

Device for notching a secondary battery manufactured using the same

The present invention relates to a lithium secondary battery, and more specifically to a lithium secondary battery having a multi-directional lead-tab structure. The lithium secondary battery of the present invention includes: an electrode assembly which is formed by alternately laminating an electrode plate having a current collector, an active material, and a tab, and an isolation layer; a lead which is electrically connected to the tab; and a battery case, wherein the lead is divided into an anode lead and a cathode lead, and at least two or more anode leads and cathode leads are provided. The battery of the present invention uses the same lead-tab size as the prior art and is suitable for use with high current.

Cathode cutting device using laser

Provided are a method of preparing an electrode assembly suitable for preparing a secondary battery having a structure that may increase a degree of freedom in the design of a device in which the secondary battery is installed, and a method of preparing a secondary battery.

Methods of preparing electrode assembly and secondary battery

Disclosed herein is a folding device to manufacture a stacked/folded type electrode assembly having unit cells sequentially stacked in a state in which a separation film is disposed between the respective unit cells, the folding device including a web supply unit to supply a web having plate-shaped unit cells arranged at a top of a separation film at predetermined intervals, a winding jig to rotate the unit cells while holding a first one of the unit cells of the web so that the unit cells are sequentially stacked in a state in which the separation film is disposed between the respective unit cells, and a rotary shaft compensation unit to compensate for the position of a rotary shaft of the winding jig in an advancing direction of the web (X-axis direction).

Device for folding electrode assembly

Disclosed is a method for manufacturing a battery cell including an electrode assembly and electrolyte provided in a battery case made of a laminate sheet having a resin layer and a metal layer, which includes: (a) mounting the electrode assembly in the battery case and sealing the periphery of the battery case except for one end part thereof through thermal fusion; (b) introducing the electrolyte through the unsealed end part and sealing the end via thermal fusion; (c) charging-discharging the battery cell to activate the same; (d) transferring gas generated during activation and excess electrolyte to the foregoing end part of the battery cell by centrifugal force; and (e) removing the gas and excess electrolyte from the end part.

Degassing method of secondary battery using centrifugal force

Provided is a unit stacking device for a secondary battery, which stacks one or more first radical units having a first size and one or more second radical units having a second size greater than the first size and includes a stack jig, which includes a first inner space having a size corresponding to the first size and a second inner space disposed above the first inner space and communicating with the first inner space and having a size corresponding to the second size. The first radical units are stacked in the first inner space through the second inner space, and then, the second radical units are stacked in the second inner space.

Device and method for stacking units for secondary battery

Disclosed is a device for notching, at an interval of a unit electrode, a continuous electrode sheet in which an electrode active material is applied to one or both surfaces thereof, to form a plurality of unit electrodes from the electrode sheet, the device including a press to press notches on the top and the bottom of the electrode sheet at a set position, and a drawing member arranged at the rear of the press based on a feed direction of the electrode sheet, the drawing member drawing and transporting the electrode sheet by one pitch, a size corresponding to the unit electrode according to operation of the press, wherein, when one of the grippers draws and transports the electrode sheet, the remaining grippers move to a position for drawing.

Device for notching and secondary battery manufactured using the same

Disclosed herein is an electrode assembly of a cathode/separator/anode structure, wherein a plurality of first unit electrodes and a second electrode sheet are wound so that the first unit electrodes are opposite to the second electrode sheet via a separator sheet, and a first electrode and a second electrode have opposite polarities.

Electrode assembly of novel structure and process for preparation of the same

Disclosed is a device for cutting an electrode sheet laminate wherein two or more continuous electrode sheets, in which an electrode active material is applied to one or both surfaces thereof, are laminated, to form a plurality of unit electrode laminates from the electrode sheet laminate, the device including a cutter to cut the electrode sheet laminate at a set position and thereby form unit electrode laminates, and two or more transport grippers arranged at the front of the cutter based on a feed direction of the electrode sheet laminate, the transport grippers drawing and transporting the electrode sheet laminate by one pitch, a size corresponding to the unit electrode laminate according to operation of the cutter, wherein while one of the transport grippers draws and transports the electrode sheet laminate, the remaining transport grippers move to a position for drawing.

Device for cutting electrode sheet and secondary battery manufactured using the same

Disclosed herein is a battery cell manufacturing device configured to manufacture a battery cell including two or more unit cells. The battery cell manufacturing device includes a unit cell stacking unit into which unit cells are introduced from above and in which the unit cells are sequentially stacked, a wrapping unit to wrap an outside of the unit cell stack discharged from the unit cell stacking unit with a separation film, and a heating unit to thermally shrink the separation film wrapping the outside of the unit cell stack.

Manufacture device of battery cell

Disclosed is a method for manufacturing a battery cell including an electrode assembly and electrolyte provided in a battery case composed of a laminate sheet having a resin layer and a metal layer, which includes; (a) thermally fusing and sealing the periphery of the case except for an end part thereof while the electrode assembly is mounted in the case; (b) introducing the electrolyte through the unsealed end part then sealing the same by thermal fusion; (c) charging and discharging the battery cell to activate the same; (d) puncturing the unsealed part inside the end part to form a through-hole communicating with the inside of the case; and (e) pulling top and bottom faces of the battery case in the opposite direction to each other at the unsealed part to open the same while applying vacuum pressure, to thereby remove the gas generated during activation as well as excess electrolyte.

Method for manufacturing battery cell and battery cell manufactured using the same

Disclosed is a unit cell transfer apparatus for arranging and delivering unit cells to a folding device, which is used in a continuous process for manufacturing a stack/folding type electrode assembly having a structure of planar unit cells wound up over a separate film.

Growing community of inventors

Gwacheon-si, South Korea

Ki Hong Min