Abstract: A low-voltage DC-DC converter includes a switch configured to convert a high voltage supplied from a high-voltage battery to an alternating current (AC) voltage, a transformer including an air gap in a core region and configured to lower the AC voltage to a low voltage using an adjusted turns ratio, and a power supply configured to rectify the low voltage and supply the rectified low voltage to a load.

Abstract: An embodiment structural battery for an electric vehicle includes an upper rail and a lower rail coupled with the upper rail, wherein the upper rail and the lower rail are electrically connected with each other by a terminal and a wiring, so that the upper rail and the lower rail electrically connected with each other serve as both the structural battery and a roof rail of a vehicle body.

Abstract: An embodiment structural battery for an electric vehicle includes a plurality of cells stacked on each other, each of the plurality of cells including a positive electrode layer, an electrolyte layer, and a negative electrode layer stacked with the electrolyte layer between the positive and negative electrodes, wherein the plurality of cells define a battery by electrical connection of a positive electrode terminal and a negative electrode terminal respectively provided in the plurality of cells, structure reinforcement layers stacked on each of an outermost upper layer and an outermost lower layer of the plurality of cells, and carbon fiber current collecting layers stacked between each of the structure reinforcement layers and the plurality of cells.

Abstract: The present invention relates to a method for preparing an alkali metal ion conductive chalcogenide-based solid electrolyte, a solid electrolyte prepared thereby, and an all-solid-state battery comprising the same.

Abstract: The present invention provides a transformer malfunction diagnostic device and a malfunction diagnosis method using same, wherein a rule-based learning method is combined with a deep-learning-based learning method based on artificial intelligence. The transformer malfunction diagnosis device according to an embodiment of the present invention comprises: a data scaling unit for scaling dissolved gas analysis data acquired from a transformer, a provisionally labeled data acquisition unit for converting unlabeled data, among the scaled dissolved gas analysis data, to provisionally labeled data and acquiring same; a prelearning unit for performing prelearning for the unlabeled data, among the scaled dissolved gas analysis data, and the provisionally labeled data; and a relearning unit for performing relearning for a labeled data through the transformer of parameters optimized by performing the prelearning.

Abstract: A low-voltage DC-DC converter (LDC) includes: an N-phase power circuit configured by connection of N DC-DC converters in parallel between a high-voltage (HV) battery and a low-voltage (LV) battery; and one output capacitor commonly connected to an output of each phase DC-DC converter. Each phase of the N-phase power circuit is controlled in an interleaving manner which delays a phase by 360°/N. Here, each N-phase power circuit is controlled by switching at a frequency of [(a frequency at which the parasitic resistance (equivalent series resistance (ESR)) of the output capacitor is minimized)/N]. The parasitic resistance of the output capacitor of the LDC can be minimized. Accordingly, a lifespan of a battery can be improved and efficiency of the DC-DC converter can be increased through the reduction of the equivalent series resistance (ESR) of the output capacitor.

Abstract: The bidirectional insulating DC-DC converter shares high/low voltage terminals, a cooling passage, a housing, and a control board, and two independent step-down circuit (10) and step-up circuit (20) are formed in parallel to perform a bidirectional DC power conversion. A high voltage applied from a high voltage battery HV is stepped down through the step-down circuit (10) and output to a low voltage battery LV. On the other hand, a low voltage applied from the low voltage battery LV is stepped up through the step-up circuit (20) and output to the high voltage battery HV. The step-down circuit (10) is formed as an active clamp forward converter circuit, and the step-up circuit (20) is formed as an active clamp flyback converter circuit.

Abstract: A battery monitoring apparatus for a battery assembly having a housing and a plurality of battery cells which is received in the housing is provided herein. The battery monitoring apparatus includes a first sensor to detect an internal temperature of the housing; a second sensor to detect an internal pressure of the housing; a third sensor to detect an internal gas of the housing; a power circuit to generate an operating voltage using a direct current power of the battery assembly; and a controller to change the first sensor, the second sensor and the third sensor from an idle state to a wake-up state using the operating voltage. The controller monitors an internal abnormality of the battery assembly based on a detection value collected from each sensor in the wake-up state.

Abstract: A battery monitoring apparatus includes a first air quality sensor to generate a first detection signal indicating a concentration of a first material in an internal space of a battery assembly in which at least one battery cell is positioned, a second air quality sensor to generate a second detection signal indicating a concentration of a second material in the internal space, and a controller to execute a first monitoring mode for collecting the first detection signal in first time series in response to an operation start command. The controller executes a second monitoring mode for collecting the second detection signal in second time series in response to the concentration of the first material indicated by the first detection signal exceeding a first threshold during the execution of the first monitoring mode.

Abstract: A system and a method for estimating pressure distribution of a battery cell evaluate distribution of pressure applied to the battery cell due to applied loads during the pressure test of the battery cell. The method includes disposing the battery cell in a pressing apparatus and pressing the battery cell, measuring strains by strain sensors provided in the pressing apparatus, and estimating a pressure distribution applied to the battery cell based on the strains.

Abstract: A device and method for diagnosing an increase in resistance of a lead unit of a battery cell, including a first voltage measurement step in which when a battery pack is in an open circuit voltage state, a voltage is measured for each unit cell of the battery pack, a second voltage measurement step in which, when the battery pack is in a charging or discharging state, a voltage is measured for each unit cell according to a predetermined current flowing through the battery pack, and a step for comparing, for each unit cell, a voltage measured in the first voltage measurement step and a voltage measured in the second voltage measurement step, and detecting whether the unit cell is abnormal.

Abstract: The present disclosure relates to a new bidirectional low voltage DC-DC converter (LDC), that is, a DC-DC converter capable of satisfying a safety level required for an eco-friendly vehicle and an autonomous vehicle and improving power conversion performance, and a method and an apparatus for controlling the same. The LDC proposed in the present disclosure is a new concept bidirectional LDC in which a plurality of converters having the same power circuit topology are subjected to a parallel interleaving operation so as to enable both a buck operation and a boost operation, satisfy a high safety level, and improve power conversion performance. To this end, a plurality of bidirectional active-clamp flyback converters (for example, two or more bidirectional active-clamp flyback converters) are connected in parallel and are interleaved and controlled by a controller (for example, a microcomputer).

Abstract: The present invention relates to a pharmaceutical composition and health functional food for preventing or treating neurodegenerative diseases which include a flower extract of Daphne genkwa or fractions thereof as an active ingredient. The pharmaceutical composition and health functional food for preventing or treating neurodegenerative diseases are, not like extracts from stems and/or roots of Daphne genkwa, free from genotoxicity and have superior prophylactic or treatment effects against neurodegenerative diseases.

Abstract: An invention that reduces an influence of dv/dt noise generated by power switching elements around a Rogowski current sensor. By separating a coil into two coils and connecting voltages generated from the two coils in series in a reverse direction, a total amount of parasitic capacitance is reduced by ¼, and accordingly, Cp*dv/dt noise is reduced. The Rogowski sensor including a first coil (Coil-P) which detects a portion of a switching current passing through bus bars (20a, 20b) and includes a first end and a second end, and a second coil (Coil-P), as a coil separated from the first coil, which detects a portion of the switching current passing through the bus bar and includes a first end and a second end, wherein the second end of the first coil is connected to the second end of the second coil to form a neutral point (123).

Abstract: The present invention relates to a pharmaceutical composition for preventing or treating neurodegenerative diseases comprising a diterpene, or a pharmaceutically acceptable salt thereof. Specifically, the diterpene of the present invention can prevent or treat neurodegenerative diseases caused by inhibition of Nurr1 activity by activating Nurr1 and inhibiting the inflammatory response.

Abstract: Disclosed are a communication method between a master controller and slave controllers, a slave controller for the communication method, and a battery management system using the communication method and the slave controller, in which the master controller receives safety information about battery cells through a plurality of channels even when each of a plurality of slave controllers includes only one micro controller unit, thereby minimizing the increase in the cost and enhancing the safety of the battery management system. The communication method includes performing bidirectional communication between a master controller and first to Nth (where N is an integer equal to or more than two) slave controllers through a first communication channel, and receiving, by the master controller, an indication signal through a second communication signal via the first to Nth slave controllers.

Abstract: A Low-voltage DC-DC Converter (LDC) includes a new bidirectional isolated LDC, in which two converters with different power circuit topologies operate in parallel in order to enable both buck mode and boost mode. The two applied converters are a phase-shift full-bridge converter with full-bridge synchronous rectification and an active-clamp forward converter. According to the present invention, it is possible to achieve the advantages of both a phase-shifted full-bridge converter with full-bridge synchronous rectification applied and an active clamping forward converter. Thus, it is possible to minimize output voltage and current ripples, thereby improving the quality of the LDC output power while minimizing electromagnetic waves generated while a product is operating.

Abstract: A device and method for diagnosing an increase in resistance of a lead unit of a battery cell, including a first voltage measurement step in which when a battery pack is in an open circuit voltage state, a voltage is measured for each unit cell of the battery pack, a second voltage measurement step in which, when the battery pack is in a charging or discharging state, a voltage is measured for each unit cell according to a predetermined current flowing through the battery pack, and a step for comparing, for each unit cell, a voltage measured in the first voltage measurement step and a voltage measured in the second voltage measurement step, and detecting whether the unit cell is abnormal.

Abstract: Provided is a new LDC to satisfy the recent requirements for a bidirectional large-capacity isolated LDC (DC-DC converter). The present disclosure provides a new bidirectional isolated LDC, in which two converters with different power circuit topologies operate in parallel in order to enable both buck mode and boost mode. The two applied converters are a phase-shift full-bridge converter with full-bridge synchronous rectification and an active-clamp forward converter. According to the present invention, it is possible to achieve the advantages of both a phase-shifted full-bridge converter with full-bridge synchronous rectification applied and an active clamping forward converter. Thus, it is to possible to minimize output voltage and current ripples, thereby improving the quality of the LDC output power while minimizing electromagnetic waves generated while a product is operating.

Abstract: The bidirectional insulating DC-DC converter shares high/low voltage terminals, a cooling passage, a housing, and a control board, and two independent step-down circuit (10) and step-up circuit (20) are formed in parallel to perform a bidirectional DC power conversion. A high voltage applied from a high voltage battery HV is stepped down through the step-down circuit (10) and output to a low voltage battery LV. On the other hand, a low voltage applied from the low voltage battery LV is stepped up through the step-up circuit (20) and output to the high voltage battery HV. The step-down circuit (10) is formed as an active clamp forward converter circuit, and the step-up circuit (20) is formed as an active clamp flyback converter circuit.