Lg Chem, Ltd

Lg Energy Solution, Ltd.

Electronics and Telecommunications Research Institute

City University of New York

Eun Ju Lee

Ji Heon Ryu

Sei Woon Oh

Youngjoon Shin

Seok Koo Kim

Min Su Kim

Jaepil Lee

Jung Eun Hyun

Je Young Kim

Ji Eun Lee

Hee Seok Jeong

Hyun Min Kim

Ki Won Sung

Jeong Hee Choi

Hanho Lee

Yong Jun Kim

Sun Hwak Woo

Soon Ju Choi

Bokkyu Choi

Ji Hoon Ryu

Jung Ah Shim

Dae Heon Park

Jong Hwan Choi

Cheol Sig Pyo

So Young Kim

Rui Zhang

Jong Suk Chae

Do Hyun Kim

Soo Ji Hwang

Tae Rim Park

Tae Hyoung Zyung

Bong Soo Kim

Hyoyoung Lee

Se Han Kim

Jee Sook Eun

Young Joon Shin

In Chul Kim

Myung Ki Lee

Tae Wook Heo

Ju Ri Kim

Jin-Young Park

Ji Hee Ahn

Myung Jong Lee

Jae Hong Ruy

Yeo Kyung Yoon

Ji Won Min

Seung Yeob Park

Mun Seok Jeong

Yoon Mee Doh

Hyo Jung Yoon

Hyun Hak Kim

Ho Sub Jung

Ye Jin Nam

Songhun Yoon

Seong Jin Kim

Joo Yong Song

Inchul Kim

The technology relates to a negative electrode for a secondary battery, and a secondary battery including same. The negative electrode comprises a composite material layer having a double-layer structure, but includes silicon oxide and carbon nanotubes in only one layer, such that it is possible to increase the capacity of a battery while preventing structural deterioration of the negative electrode due to changes in electrode volume during charging and discharging.

Negative electrode for secondary battery, and secondary battery including same

A secondary battery according to an embodiment of the present disclosure may include an electrode assembly and a pouch-type batter. The battery case may include a cup part to accommodate electrode assembly. A sealing part may extend outward from an edge of the cup part and may be sealed. A venting device may be inserted into the sealing part through which a gas inside the cup part may be discharged to the outside. The sealing part may include a vent sealing portion into which the venting device may be inserted, and a weak sealing portion which may be positioned between the vent sealing portion and the cup part and sealed more weakly than the periphery thereof.

Secondary battery and sealing block

The present invention relates to a method and system for evaluating insulation and lithium ion conductivity characteristics of a separator for an electrochemical device, in which insulation and lithium ion conductivity characteristics are evaluated while a separator-containing measurement object to be tested and an electrochemical device are made to face each other, and thus, the insulation and lithium ion conductivity characteristics of the separator can be evaluated by reflecting temperature and pressure changes and the like according to the actual operation state of the electrochemical device.

Method and system for evaluating insulation and lithium ion conductivity characteristics of separator for electrochemical device

The present invention relates to a method for manufacturing a secondary battery and a secondary battery. The method for manufacturing the secondary battery comprises an accommodation step of accommodating an electrode assembly in an accommodation part of a battery case, a vent membrane mounting step of mounting a vent membrane on a discharge hole, which passes between the inside and outside of the battery case, in the battery case, and a case sealing step of sealing the battery case, wherein the vent membrane allows only a gas to pass through the discharge hole of the battery case, but blocks a liquid.

Method for manufacturing secondary battery and secondary battery

The present invention provides an electrode assembly in which a negative electrode coated with a negative electrode active material on a surface of a negative electrode collector, a separator, and a positive electrode coated with a positive electrode active material on a surface of a positive electrode collector are repeatedly laminated, the electrode assembly comprising: monocells in which the positive electrode, the separator, the negative electrode, and the separator are laminated, wherein at least two or more monocells are laminated, wherein, in any one of the monocells, an expansion part extending lengthily to one side is formed on the separators, and the expansion part of the separator surrounds the monocells laminated to be disposed at the outermost layers to fix the laminated monocells.

Electrode assembly

Provided is a method of diagnosing the degradation of a lithium secondary battery in a non-destructive manner without disassembling the battery, which includes: obtaining, from X-ray diffraction (XRD) data obtained during first charging of the lithium secondary battery, a first graph showing the change of the c-axis d-spacing value of the layered positive electrode active material according to the number of moles of lithium ions deintercalated from the layered positive electrode active material during the charging; obtaining, from XRD data obtained during second charging of the lithium secondary battery, a second graph showing the change of the c-axis d-spacing value of the layered positive electrode active material according to the number of moles of lithium ions deintercalated from the layered positive electrode active material during the charging; and classifying a cause of degradation of the secondary battery by comparing the first graph and the second graph.

Diagnosis of cause of degradation of lithium secondary battery

Disclosed herein is a battery case configured to receive an electrode assembly and an electrolytic solution therein, the electrode assembly including a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode, the battery case including a layer structure and a gas adsorption layer formed on the inner surface of the layer structure, the gas adsorption layer including a gas adsorption material layer configured to adsorb a reaction gas that may be generated within the battery case during abnormal functioning of the electrode assembly, and a blocking layer formed on an exposed surface of the gas adsorption material layer, the blocking layer configured to prevent the gas adsorption material layer from being exposed to an ambient gas during assembly of the battery case.

Battery case having gas adsorption layer

The present invention provides an electrode assembly in which a negative electrode coated with a negative electrode active material on a surface of a negative electrode collector, a separator, and a positive electrode coated with a positive electrode active material on a surface of a positive electrode collector are repeatedly laminated, the electrode assembly comprising: monocells in which the positive electrode, the separator, the negative electrode, and the separator are laminated, wherein at least two or more monocells are laminated, wherein, in any one of the monocells, an expansion part extending lengthily to one side is formed on the separators, and the expansion part of the separator surrounds the monocells laminated to be disposed at the outermost layers to fix the laminated monocells. Furthermore, the present invention provides an electrode assembly in which a negative electrode coated with a negative electrode active material on a surface of a negative electrode collector, a separator, and a positive electrode coated with a positive electrode active material on a surface of a positive electrode collector are repeatedly laminated, the electrode assembly comprising: monocells in which the positive electrode, the separator, the negative electrode, and the separator are sequentially laminated, wherein at least two or more monocells are laminated, wherein each of the two or more monocells of the monocells comprises a positive electrode extension part, in which a positive electrode collector extends lengthily to one side, and a negative electrode extension part, in which a negative electrode collector extends lengthily to the other side, and the positive electrode extension part and the negative electrode extension part are respectively bonded to a positive electrode extension part and a negative electrode extension part to fix the laminated monocells.

A method for activating a battery cell. The battery cell includes a positive electrode coated with a nickel cobalt manganese (NCM) positive electrode material, into which lithium nickel oxide (LNO) has been added or mixed. The method includes a step of charging the battery cell; and a step of discharging the battery cell, when, in the step of charging the battery cell, the battery cell is charged under a charging condition of C-rate of 0.1 C to 0.5 C in a state of being heated at a temperature of 45&#xb0; C. to 60&#xb0; C. When the activation process is performed according to the present invention having the above-described configuration, the pressing/heating conditions for suppressing generation of a gas may be provided to prevent swelling, battery deformation, and performance deterioration due to the generation of the gas from occurring.

Apparatus and method for activating battery cell

The present invention provides a manufacturing device of a battery case including a first mold including a first space part having a shape corresponding to a storage part formed therein; a second mold including a second space part having a shape corresponding to the storage part and a through-hole communicating with the second space part formed therein, and coupled to the first mold with a laminate sheet interposed therebetween; and an air pressure regulator mounted in the through-hole in a state in which the first space part and the second space part are isolated from the outside, and increasing or decreasing an air pressure of the second space part through the through-hole to stretch and modify the laminate sheet into a shape corresponding to the first space part or the second space part.

Manufacturing device of battery case having improved manufacturing processability and manufacturing method using the same

The present invention provides a method of manufacturing n battery cells (n&#x2265;2), each including a respective reference electrode for measuring a relative electrode potential, including: (i) manufacturing a reference cell composed of an electrolyte solution, the reference electrodes, and a lithium electrode; (ii) charging the reference cell; (iii) charging the reference cell to 40% to 60% of a capacity discharged in the process (ii), thereby performing formation on the reference electrodes; (iv) manufacturing the n battery cells, each of the battery cells including a respective one of the reference electrodes, an electrode assembly, the electrolyte solution and a battery case; and (v) in each of the battery cells, measuring a relative potential of the respective one of the reference electrodes and a positive electrode of the respective electrode assembly, and a relative potential of the respective one of the reference electrodes and a negative electrode of the respective electrode assembly.

Method of manufacturing battery cell including reference electrode for measuring relative electrode potential, and battery cell manufactured therefrom

A method of preparing an electrode for a secondary battery including: (a) a process of partially coating an electrode slurry containing an electrode mixture and a solvent on an electrode sheet so that coated portions are positioned with an uncoated portion interposed therebetween; (b) a process of drying the coated portions to remove the solvent; and (c) a process of rolling the dried coated portions, wherein a thickness of the coated portion is decreased and the electrode mixture moves to the uncoated portions, resulting in the coated portions disappearing, in the process (c).

Method of preparing secondary battery including high capacity electrode

The present invention relates to an electrode assembly including at least two electrode plates and a separator interposed between the electrode plates, wherein indented portions are formed from lower ends of opposite sides of the electrode tab in an opposite direction to an externally extending direction of the electrode tab in a side of the electrode body in which the electrode tab externally extends, in the electrode plates.

Electrode assembly having indented portion formed on electrode plate, and secondary battery including same

A central safety management apparatus includes a safety management unit collecting safety management policies and regulations for each energy source and calculating operation criteria for each energy source; an accident precursor analysis unit collecting accident event related information of each energy source from a plurality of energy source safety management apparatuses managing different energy sources and analyzing occurrence possibility of safety accidents in advance based on the accident event related information and the operation criteria; and a safety enforcement unit transmitting a result of the analysis of the accident precursor analysis unit to the plurality of energy source safety management apparatuses.

Apparatus and method for energy safety management

Growing community of inventors

Daejeon, South Korea

Eun Ju Lee