Lg Chem, Ltd

Lg Energy Solution, Ltd.

Duk Hyun Ryu

Hyoung Kwon Kim

Cha Hun Ku

Kwan Soo Lee

Jun Yong Jeong

Sung Kyun Chang

Seung Tae Hong

Hyeong Jin Kim

Ho Chun Lee

Jung Jin Kim

Ha Young Heo

Eun Young Goh

Hyung Keun Lee

Jin Hee Yeon

Jeeeun Kim

Soon Ho Ahn

Young Soo Kim

Joon Sung Bae

Nak Gi Sung

Soo Hyun Ha

Hyeon Min Song

Hye Lim Shim

Hayoung Heo

Kwan Hee Lee

Sei Lin Yoon

Namwon Kim

Hyeon Soo Sim

Jin Soo Kim

Jae Hyun Lee

Joo Hwan Sung

Min Chul Jang

Sang Wan Kim

Han Ho Lee

Pil Kyu Park

Byoung Gu Lee

Hae Jin Lim

Byung Kyu Jung

Nam Won Kim

Min Gi Jeong

Jung Hoon Kim

Myung An Lee

Sue Jin Kim

Soo Jung Kim

Ik Jong Lee

Minkyung Kim

U Jin Yoon

Seung Won Park

Young San Bae

Tae Hyun Kwon

Han Mo Yang

Han Saem Park

Sora Lee

Kyung Min Jang

A lithium secondary battery which includes an electrode assembly in which a positive electrode plate, a negative electrode plate, and a separator interposed between the positive electrode plate and the negative electrode plate are wound in one direction, a battery can in which the electrode assembly is accommodated, and a sealing body which seals an open end of the battery can. The positive electrode plate includes positive electrode active material comprising single particles, quasi-single particles, or a combination thereof, and the positive electrode active material has Dof 1.0 μm or more.

Lithium secondary battery

The present technology relates to an electrode slurry coating method and apparatus comprising a pressure adjustment member for adjusting the discharge pressure of slurry, and enables electrode slurry to be discharged under constant pressure even when a coated part and an uncoated part are repeatedly formed on a current collector layer.

Electrode slurry coating method and apparatus comprising pressure adjustment member

A cylindrical battery includes a metal can, an electrode assembly located in the metal can, a cap assembly containing a current interruptive device located on a top of the electrode assembly, an upper insulator located between the cap assembly and the electrode assembly, and at least one spring integrally connected to a lower surface of the current interruptive device.

Cylindrical battery

The present invention relates to a vibration test jig for a cylindrical battery cell, including: a main body for accommodating a cylindrical battery cell; and a connection unit electrically connected to an electrode terminal of the cylindrical battery cell, wherein the connection unit includes: a connection member electrically connected to the electrode terminal and withdrawn to the outside of the main body; a support member for supporting the connection member; and a fixing member for fixing the support member on the main body. The vibration test jig enables the cylindrical battery cell mounted in the jig to be electrically connected to an external voltage and resistance measuring device through the connection unit. During a vibration test, an electrical state of the battery cell can be monitored in real time, and it can be checked whether and when an electrode tab is disconnected by using the measured voltage or resistance value.

Vibration test jig and vibration test apparatus for cylindrical battery cell

According to one aspect of the present invention, a secondary battery has a bent part disposed on an end of an upper portion of the battery can. The bent part is bent inward toward a top cap to fix the top cap. The secondary battery is configured such that, when an internal pressure of the battery can exceeds a predetermined value, a region (R) in which the top cap and the bent part overlap each other when viewed from above is reduced by deformation of the top cap or the bent part to allow an entire region of the top cap to become spaced further from the battery can.

Secondary battery

A secondary battery may include: an electrode assembly in which first and second electrode sheets are stacked and wound with a separation sheet interposed therebetween, wherein a first electrode tab protrudes in the first electrode sheet, and a second electrode tab protrudes in the second electrode sheet; a battery can to accommodate the electrode assembly therein; and a connection part above or below the electrode assembly and facing the electrode assembly, wherein the connection part has a first area made of an electrically conductive gel material; and a second area attached to the first area and made of an electrically insulating material, wherein the second area forms at least a portion of a top surface of the connection part, and at least a portion of the first electrode tab or the second electrode tab is inserted into the first area of the connection part.

Secondary battery and method for manufacturing the same

A winding device for manufacturing an electrode assembly is provided. The winding device includes a main body portion; a winding core for winding an electrode and a separation film; and a foreign particle remover connected to the main body portion and removing foreign particles, wherein the foreign particle remover is formed to surround the winding core while separated from the winding core.

Winding device for manufacturing electrode assembly

A method for manufacturing a secondary battery is provided, the method including a first step of providing a top cap and a safety vent, a second step of bending an end portion of the safety vent upward, and a third step of inserting the top cap inside the safety vent. An outer diameter A of the top cap is greater than an inner diameter B of the safety vent between the second step and the third step. A secondary battery is also provided.

Secondary battery and method for manufacturing the secondary battery

A jelly-roll type of electrode assembly in which a negative electrode sheet, a positive electrode sheet, and a separation membrane interposed between the negative electrode sheet and the positive electrode sheet are wound together is provided. The electrode assembly also includes: at least one electrode tab attached to the negative electrode sheet or the positive electrode sheet and at least a portion extending outside; and a heat radiation tape adhered to the electrode. The electrode tab to which the heat radiation tape is adhered is positioned between the center part of the wound electrode assembly and an external circumferential surface, or on the external circumferential surface, the heat radiation tape includes a heat diffusion layer, and the heat diffusion layer includes at least one of graphite and a metal foil.

Electrode assembly and rechargeable battery including the same

An electrode assembly including a negative electrode sheet, a positive electrode sheet, and a separator, wherein the separator may be disposed at an outermost side of the electrode assembly, an electrode tab disposed further inside than the separator may be attached to one of the negative electrode sheet and the positive electrode sheet, and a metal layer disposed between the electrode tab and the separator may include an adhesive material.

Cylindrical type secondary battery

A gas measuring apparatus for a secondary battery comprises: a chamber accommodating a secondary battery therein; a heater unit applying heat to the chamber to ignite the secondary battery accommodated in the chamber; a collection tube connected to the inside of the chamber to collect a gas generated in the secondary battery; a vacuum unit connected to the collection tube to vacuumize the inside of the chamber so as to introduce the gas into the collection tube; and a gas measuring unit measuring an amount of gas introduced into the collection tube.

Gas measuring apparatus for secondary battery

A secondary battery is provided. The secondary battery includes an electrode assembly including a negative electrode sheet, a positive electrode sheet, and a separation membrane; and a heat radiation tape disposed at an external circumferential surface of the electrode assembly. The heat radiation tape includes a heat diffusion layer, and the heat diffusion layer includes at least one of graphite and a metal foil.

Secondary battery and device including the same

A cylindrical rechargeable battery including a positive electrode, a negative electrode, and a separator is provided. The positive electrode includes a positive electrode tab, and a piezoelectric element and a thermoelectric element are formed at edges of the positive electrode tab.

Secondary cylindrical battery having piezoelectric element and thermoelectric element

A secondary battery and a method for interrupting current of the secondary battery according to the present invention includes a bimetal applied to the secondary battery. Thus, when an internal temperature of the secondary battery reaches a predetermined temperature, current may be interrupted even before an internal pressure of the secondary battery reaches a predetermined pressure to effectively interrupt the current in case of emergency, thereby preventing the secondary battery from being exploded or fired.

Secondary battery and method for interrupting current of secondary battery

The present disclosure provides a cylinder type battery cell manufacturing apparatus which is an apparatus configured to form a crimping portion on a cap assembly coupling portion of a cylinder type battery cell, the manufacturing apparatus including: a primary crimping mold configured to apply a primary pressure so that an open upper end portion of a cylinder type metal can forms an inclination inclined to a central axis of the metal can on a vertical section in a state in which a cap assembly is coupled to the open upper portion of the cylinder type metal can; and a secondary crimping mold configured to apply a secondary pressure to the open upper end portion in which the inclination is formed so that a flat section parallel to a lower surface of the metal can is formed in the crimping portion.

Cylindrical battery cell manufacturing device comprising secondary crimping mold

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Daejeon, South Korea

Duk Hyun Ryu