Abstract: A battery defect screening device including a battery fixer for fixing a battery, a discharger, a charger, a voltmeter for measuring an initial voltage value, a first voltage value, and a second voltage value, and a defect screener for determining the battery to be normal when a first voltage change value, which is obtained by subtracting the first voltage value from the initial voltage value, is less than a first reference value, to have a hard short due to the foreign material when the first voltage change value is greater than the first reference value, to be normal when a second voltage change value, which is obtained by subtracting the second voltage value from the initial voltage value, is less than a second reference value, and to have a soft short due to the foreign material when the second voltage change value is greater than the second reference value.

Abstract: In an embodiment, an aging determination method of a battery as a target of determination is provided. With regard to a target electrode which is at least one of a positive electrode and a negative electrode of the battery, the method estimates a correction coefficient to correct a difference between lithium concentration distributions in the target electrode at a time of charging with a first electric current and at a time of charging with a second electric current greater than the first electric current based on a difference between electric potentials of a target electrode at the time of charging with the first electric current and at the time of charging with the second electric current, and an impedance of the target electrode at the time of charging with the second electric current.

Abstract: A Battery Management System (BMS) inspects a battery pack using AC impedance. A controller on the BMS drives a Pulse-Width Modulation (PWM) output signal to an on-board excitation regulator such as a synchronous buck converter that modulates a limited energy unit such as a capacitor with a swept frequency of a PWM input signal. The capacitor modulations are applied to a terminal of the battery pack as an AC excitation signal. Synchronous sampling of the battery pack provides responses to the AC excitation signal. An AC excitation signal current and a battery response voltage are processed and Fourier-transformed to generate a Nyquist plot of the excitation-response data. Curve shifts can indicate worn battery cells. The capacitor generating the AC excitation signal draws little energy from the battery pack so AC impedance inspection can occur during all modes: charging, discharging, and idle modes without an external power supply.

Abstract: A power circuit includes at least one power detector coupled to both a first power voltage input via a pin or pad and a second power voltage supplied into a component, and configured to output a sensed power voltage changed from the first power voltage in response to a drop of the second power voltage, and a comparator configured to compare the sensed power voltage with a reference voltage to output a power sensing result.

Abstract: A battery testing apparatus includes a battery cycler configured to position a battery cell in a cell pocket defined by a baseplate. The apparatus additionally includes a thermal control device configured to regulate thermal energy in the cell pocket, a baseplate thermistor for detecting baseplate temperature, and thermal control device thermistor for detecting thermal control device temperature. The apparatus also includes a printed circuit board (PCB) in electric communication with the thermal control device thermistor. An electronic microcontroller, in electric communication with the baseplate thermistor and the PCB, is configured to regulate operation of the thermal control device based on data from the baseplate thermistor and the thermal control device thermistor.

Abstract: The present disclosure relates to a method for determining a charging time length of a battery, applied to an electronic device, including: acquiring a current charging state type of the battery in response to detecting that the battery of the electronic device enters a charging state; determining a charging stage of the battery, wherein the charging stage includes a constant current charging stage and a constant voltage charging stage; and determining the charging time length required by the battery according to the charging state type and the charging stage.

Abstract: A state monitoring circuit is disclosed for monitoring health states of N energy storage capacitors in an energy-storage capacitor device, the energy-storage capacitor device including N channels, and each channel comprising one energy storage capacitor, where the state monitoring circuit is configured to: disconnect first terminals of the N energy storage capacitors from the energy-storage capacitor device one by one; and determine whether each of the N energy storage capacitors is abnormal in accordance with a voltage at the first terminal of a corresponding one of the energy storage capacitors, where N is a positive integer.

Abstract: A blade angle feedback assembly for a variable-pitch rotor of an aircraft engine, the rotor rotatable about an axis and having rotor blades rotatable about respective spanwise axes to adjust a blade angle thereof, is provided. A sensor is configured to provide feedback on the blade angle of the rotor blades by detecting a relative movement between the sensor and a feedback device having at least one position marker thereon. The sensor comprises a magnet having a magnetic field and a first pole and a second pole opposite the first pole. A magnetic shield is configured to define a magnetic return path for at least a portion of a magnetic flux of the magnetic field exiting from the first pole of the magnet toward the second pole, the magnetic shield comprising at least one wall member spanning a distance of relative displacement between the feedback device and the sensor.

Abstract: The present disclosure relates to a composition including a light-emitting perovskite compound (1) which includes constituent components A, B, and X, and a silazane or modified product thereof (2).

Abstract: An embodiment connecting system includes a branch connector connected to a battery and configured to branch a high voltage, a first interlock circuit within the branch connector configured to form a closed circuit by being connected to a second interlock circuit within a load connector when the load connector that transfers the branched high voltage to a load is connected to the branch connector, a transmitting antenna transmitting a radio wave when the closed circuit is formed, and a controller identifying the branch connector based on a resonance frequency of the radio wave and determining whether a connection defect occurs in the identified branch connector based on an electric field strength of the radio wave, wherein the resonance frequency corresponds to a conductor pattern formed at a predetermined position of the transmitting antenna.

Abstract: According to the exemplary embodiment of the present disclosure, the apparatus and the method for detecting an aging state of a battery based on a harmonic signal detect an aging state of the battery based on a harmonic signal of a pass signal of a detection signal which passes through the battery to quickly detect the aging state of the battery without separating the system during a charging and discharging cycle.

Abstract: A battery state estimating apparatus includes: a voltage measuring unit configured to measure a voltage of a battery cell and measure an open circuit voltage (OCV) of the battery cell whenever the measured voltage reaches a reference discharge voltage; and a control unit configured to receive the OCV measured by the voltage measuring unit, compare the received OCV with a pre-stored reference voltage to calculate a voltage fluctuation rate, determine a voltage increase and decrease pattern based on the calculated voltage fluctuation rate and pre-stored voltage fluctuation rate data, and determine a degradation acceleration degree of the battery cell according to the determined voltage increase and decrease pattern.

Abstract: This decision method: determines whether measurement data pertaining to a plurality of power storage elements included in a system is periodically stored in a storage device; when the measurement data is determined as stored, determines, on the basis of the acquired measurement data, whether each of the plurality of power storage elements reaches the end of life within a period corresponding to a standard use period at a prescribed temperature; and decides that a power storage element determined as reaching the end of life is required to be replaced.

Abstract: An electric energy meter for a poly-phase electricity network includes a power transformer having a primary side and a secondary side, a first analog front end (AFE) unit is coupled to the secondary side of the power transformer, and a microcontroller coupled to the primary side of the power transformer. The first AFE unit is to be coupled to a first phase of the poly-phase electricity network. The microcontroller is configured to transmit a digitized request signal to, and to receive a measurement signal from, the first AFE unit via the power transformer. More specifically, the first AFE unit, upon receiving the digitized request signal, is to extract information from the digitized request signal.

Abstract: A vehicle-mounted device for detecting battery state comprises a controller, a load unit, and a switch unit. The load unit is coupled to the battery, the switch unit is coupled between the battery and the load unit. The controller can control the switch unit to disconnect or connect the battery and the load unit at a predefined frequency. The controller can switch the load unit to generate ripple voltage on the battery, and measure the ripple voltage of each battery cell, an abnormal state of a battery can be determined according to the ripple voltage of each battery cell.

Abstract: A connector system includes a connector for connecting a first conductor in electrical communication with a second conductor, and a sensor supported adjacent the connector. The sensor is in electrical communication with the first conductor and in electrical communication with the second conductor. The sensor detects a characteristic of the connection between the first conductor and the second conductor.

Abstract: Techniques for determining a state of health of an energy storage device that utilize a capacitor gain amplifier to provide an AC gain and block the DC voltage. An input capacitor can couple between an input excitation signal generator circuit and the amplifier's inverting input terminal, and a feedback capacitor can couple between the amplifier's inverting input terminal and the amplifier's output. A switch can be used to reset the feedback capacitor periodically to prevent the amplifier's output from becoming saturated from a leakage current at the inverting input terminal of the amplifier.

Abstract: A sensor for a separable connector comprises a plug body comprising an insulating resin, the plug body configured to be inserted into the separable connector to encase a high voltage conductor disposed in the separable connector. The sensor also includes one or more high voltage capacitors encased by the insulating resin and configured to be electrically coupled to the separable connector at a first end portion when the plug body is inserted and one or more low voltage capacitors electrically coupled in series to the one or more high voltage capacitors to form a capacitive voltage divider. The sensor also includes a low voltage connection configured to provide a low voltage signal corresponding to a high voltage signal present in the separable connector, the low voltage connection comprising a coaxial contact having a first metal contact and a second metal contact.

Abstract: From a current measurement circuit, digital samples are received of a current signal that flows through a battery cell within a measurement period. From a voltage measurement circuit, digital samples are received of a voltage signal across the battery cell within the measurement period. First voltage spectral components are generated based on performing a first transform operation on the digital samples of the voltage signal. A current spectrum is generated based on performing a second transform operation on the digital samples of the current signal. Second voltage spectral components are generated based on a first condition of the battery cell before the measurement period and a second condition of the battery cell after the measurement period. A voltage spectrum is including the first voltage spectrum and the second voltage spectrum is generated. An impedance spectrum of the battery cell is generated based on the voltage spectrum and the current spectrum.

Abstract: A method for determining a state of charge of at least one battery cell, having the following steps to enable an improved determination of the state of charge of a lithium iron phosphate cell: generating an alternating current pulse in a circuit connected to the at least one battery cell, determining an impedance of the at least one battery cell on the basis of the alternating current pulse and determining the state of charge by comparing the impedance to predefined map data, wherein a relationship between the impedance and the state of charge of the at least one battery cell is determined from the predefined map data.