Lg Chem, Ltd

Lg Energy Solution, Ltd.

Korea Advanced Institute of Science and Technology

Chonnam National University

Song Taek Oh

Jung Seok Choi

Geun Chang Chung

Ji Hye Park

Young Geun Choi

Kyung Min Kim

Jung Hwan Park

Su Rim Lee

Kyoung Ho Kim

Jong Pil Park

Doo Kyung Yang

Sun Sik Shin

Jung Woo Yoo

Sung Hoon Yu

Taek Soo Lee

Yoo Sun Kang

Kyung Mi Lee

Jong Keon Yoon

Sun Kyu Kim

Joo Yul Baek

Jung Don Suk

Hye Ran Jung

Jin Hyun Park

Su Hyun Kim

Sung Kyun Chang

Jae Hyun Lee

Min Hee Lee

Sin Young Park

Sung-Kyun Chang

Il Hong Kim

Sin Kyu Kim

Hyeok Moo Lee

Sol Nip Lee

Su Hwan Kim

Jungseok Choi

Juichi Arai

Hye Bin Kim

Jae Kook Kim

Sang Uck Lee

Jeong Gil Kim

Kyung Min Lee

Junsoo Park

Hyeokmoo Lee

Hyung Man Cho

Han Young Lee

SungJin Kim

Won Tae Joe

Hyun Seok Lee

Hyo Sik Kim

Ji Hee Ahn

Byungchun Park

Soon Hyung Choi

Ki Suk Kang

Jin Hyung Lim

Sun Jung Hwang

Jin Sub Lim

Keun Wan An

Joo Young Choi

Ji Hye Yang

Gi Min Nam

Dong Hwa Seo

Bong Kook Youn

Eun Seong Im

Ko Woon Lee

KeunWan An

Jae Min Jung

Jin Ho Yang

Kang Kun Kim

Jeonggil Kim

Du Seong Yoon

Ji Hyun Hong

Sungjin Kim

Disclosed is an apparatus and method for updating a current pattern for rapid charging, and a computer program stored in a storage medium performing the method, the apparatus includes a resistance calculation unit for calculating an internal resistance of a battery module, a storage unit for storing a current pattern for rapid charging of the battery module, and a calculation unit for updating the current pattern according to a state of the internal resistance of the battery module, and the calculation unit calculates a resistance increase rate based on the calculated internal resistance, calculates an adjustment coefficient based on the calculated resistance increase rate, and updates the current pattern using the calculated adjustment coefficient and the current pattern so that when performing rapid charging, an impact on the battery module life is minimized.

Apparatus, method and computer program for updating current pattern for quick charge

A current interrupt device, which may be included in a battery module, includes first and second connection parts each having one surface on which an inclined surface is formed; wherein the inclined surface of the first connection part and the inclined surface of the second connection part contact each other to form a contact interface, the first connection part and the second connection part are electrically connected to each other, and when an external force equal to or greater than a predetermined force is applied to the inclined surface of the first connection part or the inclined surface of the second connection part, the inclined surface of the first connection part and the inclined surface of the second connection part are dislocated with respect to each other on the contact interface to interrupt electrical connection between the first connection part and the second connection part.

Current interrupt device having connection parts with contacting inclined surfaces and battery module including the same

Provided herein are a negative electrode and a secondary battery including the same. In particular, the negative electrode includes: a current collector; a first active material layer including first active material particles and disposed on the current collector; and a second active material layer including second active material particles and disposed on the first active material layer, in which a lithium ion diffusion rate of the second active material particles is two to three times that of the first active material particles.

Negative electrode for secondary battery

An electrode for a rechargeable battery in which a current collector is coated with an electrode mixture including an electrode active material and a binder includes a first electrode composite layer including PVdF as a first binder and an electrode active material and applied on a current collector; and a second electrode composite layer including a second binder and an electrode active material and applied on the first electrode composite layer, wherein crystallinity of the first binder is 58 or greater.

Multi-layered electrode for rechargeable battery including binder having high crystallinity

The present invention relates to a positive electrode for a secondary battery to improve stability during overcharge, and a lithium secondary battery including the same, and particularly, to a positive electrode for a secondary battery including a positive electrode active material layer formed on a positive electrode collector, wherein the positive electrode active material layer has a double-layer structure which includes a first positive electrode active material layer formed on the positive electrode collector and a second positive electrode active material layer formed on the first positive electrode active material layer, the first positive electrode active material layer includes a first positive electrode active material, a conductive agent, and a volume expansion resin in which volume expansion occurs at a high temperature during overcharge, and the second positive electrode active material layer includes a second positive electrode active material, and a lithium secondary battery including the same.

Positive electrode for secondary battery and lithium secondary battery including the same

Provided are a method for designing an electrode for a lithium secondary battery comprising measuring the electrical conductivity of an electrode with an alternating current to determine whether an electrical path in the electrode has been appropriately formed, and a method for manufacturing an electrode for a lithium secondary battery comprising the same. According to the present invention, it is possible to determine the content of a conductive agent in the electrode using the same.

Method for designing electrode for lithium secondary battery and method for manufacturing electrode for lithium secondary battery comprising the same

Disclosed herein are a secondary battery configured to be prevented from catching fire or exploding in a critical situation such as overcharging and a method of preventing the secondary battery from catching fire or exploding. Since a separator including a low melting point material is used, a short circuit in the battery occurs when the battery is abnormally heated, and the resistance of an electrode is increased when the temperature of the battery increases to a predetermined temperature or higher. As a result, a positive temperature coefficient (PTC) material is operated at a stable State of Charge (SoC). Consequently, it is possible to prevent the occurrence of a thermal runaway phenomenon of the battery.

Separator having melting-cutoff portion and electrochemical device including the same

The present invention relates to a method of preparing an electrode for a lithium secondary battery and an electrode for a lithium secondary battery prepared thereby, wherein, since the method may suppress the migration of a binder and may uniformly control the distribution of the binder in the electrode by forming a plurality of negative electrode active material layers and allowing a drying condition of each of the negative electrode active material layers to be different, the method may improve life characteristics by improving adhesion between a negative electrode active material and a current collector and may improve charging characteristics by reducing interfacial resistance of the negative electrode.

Method of preparing electrode for lithium secondary battery and electrode for lithium secondary battery prepared thereby

A method of preparing an electrode for a secondary battery, including: (i) a process of preparing a current collector in which through-pores or holes are formed and an electrode slurry containing an electrode active material; (ii) a process of bringing a shielding film into close contact with one surface of the current collector to shield pores or holes on the one surface of the current collector; (iii) a process of coating the electrode slurry on the other surface of the current collector to which the shielding film is not attached, and primarily drying to prepare an interim electrode; (iv) a process of removing the shielding film from the interim electrode; and (v) a process of secondarily drying the interim electrode to prepare the electrode.

Method of preparing electrode using current collector having through-pores or holes

A secondary battery comprises: a pouch; an electrode assembly mounted within the pouch and having a structure in which electrodes and separators are alternately laminated, the electrode assembly having a tab connection part in which electrode tabs extending from ends of the electrodes overlap each other; a lead comprising a first lead having one end electrically connected to the tab connection part and a second lead having one end electrically connected to the first lead and the other end extending outside of the pouch, each of the first lead and the second lead being fixed to respective portions of an inner surface of the pouch; an adhesion unit mechanically and electrically coupling the first lead and the second lead to each other; and a high-voltage decomposition material that is configured to generate a gas when a high voltage having a predetermined level or more is applied to the adhesion unit.

Secondary battery

The present invention relates to a separator for a lithium secondary battery, which includes a porous substrate, and a lithium metal layer formed on one side of the porous substrate, wherein the lithium metal layer is formed on an outer circumferential surface of the porous substrate and has a window frame shape with an empty interior, and a lithium secondary battery including the same.

Separator for lithium secondary battery and lithium secondary battery including the same

An electrode assembly according to an exemplary embodiment of the present invention includes a cathode plate and an anode plate; a separator disposed between the cathode plate and the anode plate; and coating layers disposed between the separator and the cathode plate and between the separator and the anode plate. The separator includes a first portion that is covered with the coating layer, and a second portion that exposes a surface facing the cathode plate and a surface facing the anode plate, and at least one of the cathode plate and the anode plate includes a positive temperature coefficient (PTC) material.

Electrode assembly and method of stabilizing secondary battery

A non-aqueous electrolyte solution and a lithium secondary battery including the same are disclosed herein. In some embodiments, a non-aqueous electrolyte solution includes an HF indicator, and a pouch-type lithium secondary battery includes a pouch case having a transparent identification part for observing the interior of the pouch-type battery from the exterior of the pouch case. Defects generated during the preparation of the secondary battery may be visually identified based on the presence of hydrofluoric acid without disassembling the pouch-type battery.

Non-aqueous electrolyte solution and lithium secondary battery including the same

An electrode mixture of the present invention comprises: an electrode active material; a binder; and a conductive material. When a cross-section of the electrode mixture is imaged such that a pixel filled 100% with a conductive material among a plurality of divided pixels is considered to be a condensed pixel and a value obtained by counting condensed pixels is considered to be the degree of agglomeration, the degree of agglomeration of a conductive material in the electrode mixture in the depth direction of the electrode mixture has a standard deviation less than 3.0. The electrode mixture as described above includes a conductive material uniformly distributed therein and thus has low electrode resistance. Therefore, the electrode mixture can improve output and lifespan properties of a lithium secondary battery to which the electrode mixture has been applied.

Electrode mixture, preparation method thereof, and secondary battery including the same

Provided are a positive electrode for a secondary battery which includes a positive electrode collector, a porous positive electrode active material layer disposed on a surface of the positive electrode collector and including a positive electrode active material and first carbon nanotubes, and a conductive layer disposed on a surface of the positive electrode active material layer, wherein the conductive layer includes a porous network structure formed by a plurality of second carbon nanotubes and has a porosity equal to or greater than a porosity of the positive electrode active material layer +10 vol %, and a secondary battery including the same.

Positive electrode for secondary battery and secondary battery including the same

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Daejeon, South Korea

Song Taek Oh