Abstract: A method of ground fault detection in a power distribution system includes detecting a ground fault in the power distribution system; sending an instruction to a first switching device to disconnect a first energy storage unit from the energy storage system whilst the remaining energy storage units remain connected in parallel to the DC bus to be able to continue to supply power to the power distribution system and testing again for a ground fault. The testing for a ground fault is carried out again and disconnecting, testing and reconnecting steps are repeated until the ground fault has been identified, or all energy storage units have been tested.

Abstract: According to one embodiment, an evaluation device for an energy storage device includes first processing circuitry and second processing circuitry. The first processing circuitry acquires data items including an amount of charge and a voltage value measured in a measurement period from the energy storage device, the energy storage device being charge-discharge-controlled according to charge-discharge command values. The second processing circuitry generates a representative data item of voltage values for amounts of charge, based on the data items acquired for the measurement period; and evaluates a degradation state of the energy storage device, based on a relative change between a plurality of the representative data items corresponding to a plurality of the measurement periods.

Abstract: An integrated circuit that can include a driver having a first driver output, and a first resistance coupled between a first node coupled to the first driver output and a second node. The first resistance can include a process resistor including a first material having a first temperature coefficient, and an interconnect resistor configured to provide at least 20% of the first resistance and including a second material having a second temperature coefficient which changes resistance in an opposite direction with temperature as compared to the first temperature coefficient. A first terminal of the interconnect resistor is directly connected to a first terminal of the process resistor.

Abstract: The invention relates to an eddy current sensor element for non-destructive testing of a substrate, having an assembly of at least a first and a second flat coil, wherein the first flat coil and the second flat coil each have a triangular shape with a first to third coil edge, wherein one of the edges of the first flat coil and one of the edges of the second flat coil are arranged adjacent and parallel to each other, and wherein the assembly has a quadrangular shape. The invention further relates to an eddy current sensor for the non-destructive testing of a substrate, having a plurality of the eddy current sensor elements.

Abstract: A method for estimating a state of charge (SOC) value of a battery may include determining, by a controller, whether an entry condition for estimating the SOC value of the battery is satisfied based on state data of the battery; generating, by the controller, an initial SOC value of the battery using an internal resistance value of the battery when the state data satisfies the entry condition; generating, by the controller, a first storage capacity of the battery to generate using the initial SOC value; generating, by the controller, a second storage capacity of the battery using the first storage capacity and a charging efficiency of the battery; and estimating, by the controller, the SOC value of the battery using the second storage capacity.

Abstract: Voltage indication device (2), attachable to a medium-voltage separable plug having a rear insert comprising a coupling electrode. The voltage indication device comprises a body (241) and a voltage detector (251) having a ground contact (361), a voltage contact (261) for electrical connection to the coupling electrode; and an indicator for visually indicating presence of the medium voltage in the separable plug. The body comprises an elastically expandable support portion (406) for resiliently supporting the voltage detector (251).

Abstract: In accordance with the present disclosure, voltage sensing techniques using a voltage sensing device are employed to identify sources of electromagnetic radiation and provide warnings to a user about high levels of electromagnetic radiation. By way of example, the voltage sensing device may be a wearable device and may provide auditory, visual, and tactile alerts to a user.

Abstract: Various embodiments of the present technology may provide methods and apparatus for a battery. The apparatus may compute a state of charge (SOC) of the battery using a coulomb counting method and adjust the computed SOC based on an extracted SOC. The apparatus may determine whether the battery is in an open circuit condition and, if so, the extracted SOC is determined during the open circuit period.

Abstract: A method for determining residual stress in a selectively hardened parts including an unhardened region adjacent to a hardened region is provided. The method includes obtaining a Barkhausen Noise (BN) value for the unhardened region and selecting a corresponding absolute residual stress value from a correlation between BN values and absolute residual stress values. The selected absolute residual stress value accurately estimates the absolute residual stress in the hardened region of the selectively hardened part. In variations of the method the unhardened region is surrounded by the hardened region, the hardened region is a laser hardened region and the unhardened region is not laser hardened.

Abstract: An image forming apparatus includes a storage and an authentication section. The storage stores container identification information provided to each individual developer container in combination with remaining amount information indicating a remaining amount of developer stored in the developer container. The authentication section authenticates the developer container based on the remaining amount information.

Abstract: Provided are a developing roller which includes a shaft, and a base layer and a surface layer sequentially formed on an outer peripheral portion of the shaft in a radial direction, where 1) a low-resilience layer is disposed between the base layer and the surface layer, 2) the low-resilience layer has a loss tangent tan ? value that is larger than a loss tangent tan ? value of any of the base layer and the surface layer when measured under conditions of a temperature of 23° C., an amplitude of ±20 ?m, and a frequency of 6 Hz, and 3) the developing roller has an Asker C hardness and thickness value of 500 or less, which is defined by the following formula (1): Asker C hardness and thickness value of the developing roller=Asker C hardness of the developing roller×(thickness of the developing roller+6)??(1).

Abstract: Provided is a current measuring device for measuring current, including a conductor (1) adapted to pass current therethrough, and a circuit board (31) with a wire, the wire being adapted to extract a voltage signal from the conductor, in which the circuit board is disposed upright with respect to the conductor.

Abstract: A system and method for forming a low cost optical sensor array. The sensor includes an optical fiber; a first nanocomposite thin film along at least a portion of the optical fiber for interrogating a first parameter through a correlated signal having a first wavelength; and a second nanocomposite thin film along at least a portion of the optical fiber for interrogating a second parameter through a correlated signal having a second wavelength different from the wavelength of the first parameter.

Abstract: A chargeable battery abnormality detection apparatus configured to detect an abnormality of a chargeable battery includes a processor; and a memory storing instructions executable by the processor, wherein the processor performs the following when executing instructions: calculating a value of an internal resistance of the chargeable battery; determining whether the chargeable battery is being charged or being discharged; determining that an abnormality has occurred in the chargeable battery if either one of the following occurs: the calculated value of the internal resistance decreases while the chargeable battery is being discharged; and the calculated value of the internal resistance increases while the chargeable battery is being charged; and outputting a determination result of the abnormality.

Abstract: Systems and methods of monitoring and testing a battery module, including generating Electrochemical Impedance Spectra (EIS) of one or more battery modules, fitting the EIS spectra to an equivalent circuit model to establish equivalent circuit fit parameters, measuring an open circuit voltage of the one or more battery modules, measuring a temperature of the one or more battery modules, combining the EIS equivalent circuit fit parameters with measured open circuit and temperature values to determine weighting parameters of the equivalent circuit fit parameters, applying the weighting parameters to the equivalent circuit fit parameters to generate weighted equivalent circuit fit parameters, and generating a state-of-health (SoH) measurement of the one or more battery modules based on the weighted equivalent circuit fit parameters.

Abstract: A method for determining a battery state of charge (SOC) includes: determining a basic SOC of a battery of a terminal apparatus at a current time; determining rated and maximum power consumption parameters of the terminal apparatus in a time period between the current time and a reference time previous thereto; determining a reference SOC at the current time based on the rated power consumption parameter and an actual SOC at the reference time; determining a minimum SOC at the current time based on the maximum power consumption parameter and the actual SOC at the reference time; and judging whether the basic SOC is between the minimum SOC and the actual SOC at the reference time or not, and if yes, determining the basic SOC as an actual SOC at the current time, and if not, determining the actual SOC at the current time based on the reference and basic SOC.

Abstract: A system and method to determine battery lifetime of a remote meter transmission unit. Disclosed methods may comprise sampling a meter transmission unit's voltage and temperature while the unit is not transmitting any data; selecting a temperature curve based on the sampled temperature of the unit from a plurality of predetermined temperature curves, wherein each predetermined temperature curve representing the battery lifetime based on the unit's sampled voltage at the unit's sampled temperature; locating a position from the selected curve based on the voltage sampled of the unit; determining the battery's electrical power consumed and remained based on the position of the curve; and determining the battery's lifetime based on the power consumed and remained. The disclosed method may be used to estimate the battery's remaining lifetime. Disclosed products may utilize the disclosed method.

Abstract: A circuit includes an input terminal, a first transistor, a second transistor, a comparator, a voltage reference circuit, and a control circuit. The first transistor includes a first terminal coupled to the input terminal. The second transistor includes a first terminal coupled to the input terminal. The comparator includes a first terminal coupled to the input terminal. The voltage reference circuit is coupled to a second terminal of the comparator. The control circuit includes an input, a first output, and a second output. The input is coupled to an output of the comparator. The first output is coupled to a second terminal of the first transistor. The second output is coupled to a second terminal of the second transistor.

Abstract: A battery device includes a first battery and a second battery connected in series. An electronic device for determining a state of charge of the battery device includes a sense resistor connected in series to the second battery, and a fuel gauge. The fuel gauge is configured to determine the state of charge of the battery device based on a first terminal voltage of the first battery, a first calculation current of the first battery, a second terminal voltage of the second battery, and a measurement current of the second battery measured through the sense resistor. The fuel gauge calculates a second calculation current of the second battery using a battery parameter of an equivalent circuit model, corrects the battery parameter when a difference between the measurement current and the second calculation current is not less than a threshold value, and calculates the first calculation current using the battery parameter or a corrected battery parameter.

Abstract: An image forming apparatus, configured to operate in first and second modes of which color gamut is different from each other, includes an exposure unit configured to expose a photosensitive drum; a developing roller configured to form a toner image; a detection unit configured to detect density of the toner image transferred to an intermediate transfer member; and a controller configured to adjust the density based on a value of input image data. A dithering process for the controller's controlling of the exposure unit is different depending on whether the operation is in the first mode or the second mode, and in at least a part of the input image data, the density of the toner image formed by the dithering process in the first mode is higher than the density of the toner image formed by the dithering process in the second mode.