Lg Chem, Ltd

Jun Woo Huh

Hyuk Joo Kim

Hyang Mok Lee

Chang Bum Ahn

Dae Geun Ku

Hyuk Su Kim

An electrode assembly according to the present disclosure includes an electrode stack part formed by stacking at least one radical unit having a four-layered structure of a first electrode, a separator, a second electrode and a separator, and an electrode fixing part for wrapping and fixing the electrode stack part. The electrode assembly according to the present disclosure may be fabricated by means of a stacking process other than a folding process, and may accomplish accurate alignment and stable fixing.

Electrode assembly and electrochemical cell including the same

An impeller mixer of electrode slurry includes a container () filled with raw materials of electrode slurry, impellers () have different shapes from each other and are multi-layered, the impellers being rotatably provided in the container () and configured to mix the raw materials of electrode slurry, and a driving part () disposed on a bottom portion of the container () and coupled to the impellers () through a coupling shaft to rotate the impeller, wherein the coupling shaft is disposed above the driving part. Therefore, multi-layered impellers () rotating at a high speed efficiently disperse raw materials of electrode slurry in a short time and also allow the raw materials to be uniformly mixed, resulting in an increase in work efficiency.

Impeller mixer of electrode slurry

A fabricating method of a unit structure for accomplishing an electrode assembly formed by a stacking method, and an electrochemical cell including the same are disclosed. The fabricating method of the electrode assembly is characterized with fabricating the unit structure by conducting a first process of laminating and forming a bicell having a first electrode/ separator/ second electrode/ separator/ first electrode structure, conducting a second process of laminating a first separator on one of the first electrode among two of the first electrodes, and conducting a third process of laminating second separator/second electrode one by one on the other first electrode among the two of the first electrodes.

Electrode assembly, fabricating method of the electrode assembly and electrochemical cell containing the electrode assembly

Provided is a method of manufacturing an electrode assembly which is different from a stack folding method and a stack method. The method includes forming a unit structure, which comprises a stacked structure formed by sequentially stacking a first electrode, a first separator, a second electrode, and a second separator, or a structure formed by repeatedly forming the stacked structure a plurality of times (operation S), forming the electrode assembly by repeatedly stacking the unit structure into a plurality of layers (operation S), and discharging gas interposed between the layers by pressing the electrode assembly (operation S).

Method of manufacturing electrode assembly

Provided is a cathode including a cathode current collector, a cathode tab protruding from the cathode current collector, and an insulation layer coated with an insulating material on the cathode tab, and a secondary battery including the cathode. Since the cathode of the present invention includes an insulation layer on a cathode tab, the present invention may prevent an internal short circuit which may occur due to cell deformation or sharp edges of electrodes, which are formed during cutting of the electrodes in a preparation process of the battery, when the electrodes are stacked, or may prevent a physical short circuit between the cathode and the anode due to shrinkage of a separator in a high-temperature atmosphere. In a case where the cathode is used in a lithium secondary battery, safety and reliability in battery performance may be significantly improved.

Cathode including insulation layer on cathode tab and secondary battery including the cathode

Provided are a pouch for a secondary battery including a first sheet and a second sheet, and a frame unit which is sealed by the first sheet and the second sheet and includes an accommodating part for accommodating an electrode assembly including electrode tabs therein, and a secondary battery including the pouch. According to the present invention, since a structure of a pouch for a secondary battery may include a frame unit capable of accommodating a large electrode assembly, a high-capacity and large-area secondary battery having high capacity and high stiffness may be realized.

Pouch for secondary battery and secondary battery including the same

Disclosed is a technology for preventing electrodes in a secondary battery from being short-circuited with each other. An electrode assembly includes a cathode and anode of which a cathode collector and anode collector are coated with a cathode active material and anode active material, respectively, and a separator disposed between the cathode and the anode. An insulation layer is disposed on a tab part of the cathode collector constituting the cathode. Thus, an insulation layer may be disposed on an end (a tab part) of the cathode collector that is used as a tab of the cathode electrode in the structure of the electrode assembly to prevent the cathode from being physically short-circuited with the anode in the sequentially stacked structure of cathode/separator/anode.

Electrode assembly and electrochemical device including the same

A fabricating method of a unit structure for accomplishing an electrode assembly formed by a stacking method, and an electrochemical cell including the same are disclosed. The fabricating method of the electrode assembly is characterized with fabricating the unit structure by conducting a first process of laminating and forming a bicell having a first electrode/separator/second electrode/separator/first electrode structure, and conducting a second process of laminating first separator/second electrode/second separator one by one on one of the first electrode among two of the first electrodes.

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Daejeon, South Korea

Jun Woo Huh