Hyundai Motor Company

Samsung Electronics Co., Ltd.

Lg Chem, Ltd

Kia Motors Corporation

Lg Energy Solution, Ltd.

Kia Corporation

Coway Co., Ltd

Dong Hui Kim

Tae Sung Kim

Jong Kon Bae

Dong Kyoon Han

Jeong Heon Ahn

Sang Mok Park

Hyo Jin Bae

Kyoung Han Ryu

Shin Kook Kong

Sang Heon Lee

Hee Jung Jeon

Sung Hoon Lim

Yun Seok Kim

Jun Ki Rhee

Kyoung Hwan Oh

Ho Taek Lee

Suk Youn Kang

Sam Ick Son

Su Hwa Kim

Se Young Lee

Kwang Ho Yoo

Sa Rah Kim

Young Hee Ha

Dong Jun Lee

Tae Young Kim

Hong Seok Min

Won Hee Kim

Sang Jin Park

Han Soo Kim

Hyun Woo Park

Sung Ho Park

Won Mun Choi

Jin Hee Lee

Seung Ho Choi

Dong Ju Lee

Sang Woo Kang

Soo Young Choi

Suk Joon Yoo

Byung Soo Yun

Jung Yeon Kim

Tae Kyung Kang

Hyun Woong Park

A method of preparing a secondary battery including pre-lithiating an electrode assembly including an electrode structure including a plurality of electrodes and a plurality of separators, and a metal substrate. The plurality of electrodes and the plurality of separators are alternatingly stacked. The pre-lithiating includes supplying lithium ions from one of the plurality of positive electrodes to one of the plurality of negative electrodes up to a state of charge (SOC) of A % by electrically connecting one of the plurality of positive electrodes and one of the plurality of negative electrodes and applying a first current, supplying lithium ions from the metal substrate to the positive electrodes up to B % of capacity of the positive electrodes by electrically connecting the metal substrate and the positive electrodes and applying a second current, after applying the first current, and resting the electrode assembly, after applying the second current.

Method of preparing secondary battery

A system for manufacturing a lithium ion secondary battery includes an unwinder supplying a current collector to be coated to a predetermined position, a coating device coating a coating liquid on the current collector, a drying device drying the coated current collector, and a rewinder winding the coated current collector passing through the drying device at a predetermined position.

System and method of manufacturing lithium ion secondary battery

A method of preparing a secondary battery which includes pre-lithiating an electrode assembly which includes an electrode structure including a plurality of electrodes and a plurality of separators, and a metal substrate. The plurality of electrodes and the plurality of separators are alternatingly stacked. The metal substrate is present on an outermost surface of the electrode structure in a direction in which the electrode and the separator are stacked. Each positive electrode and negative electrode are spaced apart from each other with one separator of the plurality of separators disposed therebetween. The pre-lithiating includes applying a first current by electrically connecting one of the plurality of positive electrodes and one of the plurality of negative electrodes, and applying a second current by electrically connecting the metal substrate and one of the plurality of positive electrodes, after applying the first current.

The present invention relates to a method for manufacturing an anode of a lithium-ion battery capable of controlling an expansion directionality of an anode material whose volume expands by charging, and a lithium-ion battery including the anode manufactured by the method. More specifically, the present invention provides a method capable of improving the life of a lithium-ion battery by adjusting the tensile strength of a current collector and thus controlling the expansion directionality of an anode material, which expands during charging.

Method for manufacturing anode of lithium-ion battery and lithium-ion battery including anode of lithium-ion battery manufactured by the method

A method for determining a low voltage defect of a lithium secondary battery is provided. The method includes measuring a primary voltage of a lithium secondary battery whose formation process has been completed, transporting the lithium secondary battery, measuring temperatures to which the lithium secondary battery has been exposed during the transporting process, measuring a secondary voltage of a lithium secondary battery whose transporting has been completed, revising the secondary voltage to calculate a corrected secondary voltage based on the temperature to which the lithium secondary battery has been exposed, and comparing the primary voltage and the corrected secondary voltage to determine whether the lithium secondary battery is defective.

Method for judging a low voltage defect in a lithium secondary battery

A robot purifier including: a purifying part which draws, purifies, and discharges air; and a driving part which is located at a lower end of the purifying part and is capable of autonomous driving, wherein the purifying part is capable of rotating 360 degrees horizontally, and the purifying part also is capable of rotating vertically such that an air intake direction and an air discharge direction in the vertical and horizontal directions is controllable.

Robot purifier capable of rotating vertically and horizontally

An electronic device is provided. The electronic device may include a display driver module configured to, in response to receiving display data, divide the display data into a plurality of segments corresponding to a plurality of display regions, compare the display data in the plurality of segments to determine whether the display data in at least one segment is substantially same as the display data in another segment, and based on the comparison outcome, selectively amplify a first display signal generated from the display data in the at least one segment or a second display signal generated from the display data in the another segment.

Operating module for display and operating method, and electronic device supporting the same

An all-solid-state battery includes: a cathode substrate; a cathode portion; a solid electrolyte layer; an anode portion; and an anode substrate. The cathode portion includes a cathode active material, a first solid electrolyte, a conductive material, and a binder, the anode portion is configured by a first anode portion having a pore structure and a second anode portion having metal foil, and the first anode portion includes a second solid electrolyte, a conductive material, and a binder.

All solid state battery and manufacturing method thereof

A display driver integrated circuit is disclosed. The display driver integrated circuit includes panel signal supply circuitry configured to supply an image signal corresponding to image data to a panel, pixel power supply circuitry configured to supply pixel power to a pixel that receives the image signal, and a controller configured to control the pixel power supply circuitry to supply the pixel power based on an on-pixel ratio (OPR) value of the image data.

Display driving method, display driver integrated circuit, and electronic device comprising the same

The present invention provides a modifier, a modified conjugated diene-based polymer which is modified using the same, and a rubber composition including the modified conjugated diene-based polymer, and more particularly, a modifier which includes a compound represented by Formula 1 and is capable of improving the mixing properties between a conjugated diene-based polymer and a filler, a modified conjugated diene-based polymer which is modified using the same, and a rubber composition including the modified conjugated diene-based polymer.

Modifier, modified and conjugated diene-based polymer and rubber composition including the same

The present invention relates to a modifier represented by Formula 1, a modified conjugated diene-based polymer having a high modification ratio which includes a modifier-derived functional group, and a method of preparing the polymer.

Modifier and modified conjugated diene-based polymer including functional group derived therefrom

Disclosed are an electrode for a lithium secondary battery, a manufacturing method thereof, and a lithium secondary battery including the same. The electrode for a lithium secondary battery includes a lithium metal matrix layer, and a support that is formed in a net-shape and impregnated into the lithium metal matrix layer.

Electrode for lithium secondary battery, manufacturing method thereof, and lithium secondary battery including the same

The present invention provides a modified butadiene-based polymer capable of enhancing dispersability of an inorganic filler when used in a rubber composition, and enhancing viscoelasticity, a tensile property and processibility of the rubber composition in a balanced way from an interaction with the inorganic filler, and a modifier useful for preparing the same.

Modified butadiene-based polymer and modifier useful for preparing the same

Growing community of inventors

Seoul, South Korea

Dong Hui Kim