Hyundai Motor Company

Kia Corporation

Seoul Semiconductor Co., Ltd.

SangWook Han

Hannah Song

Kyeong Wi Park

HyungJin Lee

SungHo Jin

A method of manufacturing an all solid state battery is disclosed. In one embodiment, the method includes forming a negative electrode including a negative active material layer and a negative buffer layer, forming a sulfide-based solid electrolyte layer on a first surface of the negative electrode, forming a positive electrode including a positive active material layer and a positive buffer layer, and bonding the positive electrode to a second surface of the solid electrolyte layer.

Method of manufacturing an all solid state battery

A system for fabricating an electrode film for a secondary battery includes a powder film fabrication unit configured to form mixture powder with active material powder, binder powder, and conductive material powder, and fabricating a powder film roll by fibrillating the mixture powder, a base material film fabrication unit configured to form a mixture solution with carbon-based powder, the binder powder, and organic solvent, and form a base material film roll by patterning the mixture solution on a base material film, and an electrode film fabrication unit configured to dispose the base material film roll between two powder film rolls, and form an electrode film roll by overlapping and bonding the powder film and the base material film.

System and method for fabricating electrode film for secondary battery

An embodiment all solid state battery includes a sulfide-based solid electrolyte layer, a negative electrode comprising a negative active material layer stacked on a first surface of the solid electrolyte layer and a negative buffer layer stacked on a first surface of the negative active material layer, and a positive electrode comprising a positive active material layer stacked on a second surface of the solid electrolyte layer and a positive buffer layer stacked on a second surface of the positive active material layer.

All solid state battery and manufacturing method

A light-emitting diode driving module includes an LED driving circuit to activate light-emitting diodes driven by a modified rectified voltage, and to adjust driving currents conducted to driving nodes to the light emitting diodes; a driving current controller to receive a dimming signal indicative of a degree of modulation of the rectified voltage, and to control currents conducted to the driving nodes depending on the dimming signal; and a current blocking circuit to block the currents of the driving nodes when a dimming level of the dimming signal decreases lower than a first threshold value, and unblock the currents of the driving nodes when the dimming level increases above a second threshold value higher than the first threshold value.

Light-emitting diode driving module, method of operating thereof, and lighting apparatus including the same

A light-emitting diode driving module includes an LED driving circuit to activate light-emitting diodes driven by a rectified voltage, and to adjust driving current conducted through driving nodes to the light-emitting diodes depending on a voltage of a driving current setting node; and a driving current controller to control the voltage of the driving current setting node by outputting a driving current control signal. The driving current controller includes a control signal output circuit connected to a dimming node to receive a dimming signal when the rectified voltage is modulated, and to adjust the driving current control signal depending on the dimming signal; a mode detector to detect whether the rectified voltage is modulated by receiving a source voltage depending on the rectified voltage, and to enable a selection signal depending on a detection result; and a power compensator to adjust the driving current control signal when the selection signal is enabled.

Growing community of inventors

Ansan-si, South Korea

SangWook Han