112results about How to "Accurate capacity" patented technology

The present invention involves one or more computers that provide software controls to enable a web application to interface with a personal trusted device. The server side of the computer system comprises: a server-based framework process; a device for receiving requests from the client computer and determining which software controls to send in response; and a device for digitally signing and encrypting the software controls before sending them to the client computer so that their authenticity can be verified. The client side of the computer system comprises: a client web browser that runs on a computer; a device for transmitting requests to the server computer and for receiving responses from those requests; a device for decrypting software controls so that the authenticity of their digital signature can be verified; and a connection to one or more personal trusted devices. An authentication proxy may be used to mutually authenticate a client user and server process using personal trusted devices.

A flash memory device, and a method of operating the same, is disclosed. The array of the flash memory device is arranged in pages of memory cells, each page having memory cells associated into groups of memory cells within the page for purposes of fail bit detection in program verification. For example, these groups may correspond to sectors within the page. In a programming operation, the verify process determines whether each group of memory cells within the page has fewer than a selected ignore bit limit for the sector. If not, additional programming is required for the insufficiently programmed cells in the page. By applying a fail bit detection threshold for each of multiple groups within the page, the efficiency of error correction coding in the flash memory is improved. A similar verify and fail bit detection approach may be used in erase and soft programming operations.

The present invention provides a nano-calorimeter device operable for measuring and characterizing the thermodynamic and other physical properties of materials that are confined to essentially nano-scale dimensions. The nano-calorimeter device including a thin film membrane having a first surface and a second surface. The nano-calorimeter device also including a frame structure disposed adjacent to and in thermal contact with the first surface of the thin film membrane, the frame structure defining a plurality of hollow cells adjacent to and in thermal contact with the first surface of the thin film membrane. The nano-calorimeter device further including one or more micro-heating elements disposed adjacent to and in thermal contact with the second surface of the thin film membrane, the location of the one or more micro-heating elements disposed adjacent to the second surface of the thin film membrane substantially corresponding to the location of the plurality of hollow cells defined adjacent to the first surface of the thin film membrane.

A system and process / method of modeling demand-response (DR) and distributed-energy resource (DER) assets is provided, facilitating the aggregation of said assets in virtual power plants (VPPs), and using VPPs to provide energy balancing services needed to minimize the impact of Variable Energy Resources (VER) on power system. The method accurately accounts for assets by qualifying assets based on various parameters and by forecasting the capabilities of the resulting VPPs for provision of balancing services. Asset performance factors that may affect the aggregated VPP's capabilities are monitored and recalculated when necessary. Near-term forecasted VPP capability is compared to near-term forecasted imbalances in the electric-power-supply system, and the VPP is dispatched to minimize the system imbalances. The dispatch signal is disaggregated to control commands to individual assets. This process provides a reliable and cost effective approach to support higher penetrations of renewable generation in the electric power system.

An apparatus for determining the necessary capacitance required to correct power factor in an electrical power system comprises a plurality of capacitors having predetermined capacitances connected in series with a plurality of switching devices, said capacitances and switching devices connected between the line voltages of said power system to correct power factor. A means for determining power factor in said power system may include a power factor meter or a plurality of current transmitters and voltage probes used to provide data to a microcontroller to calculate power factor.

Apparatus and method for real-time analysis of an electric power transmission link status direct buried or installed in a duct or a tunnel are described. The method includes: real-time measuring a surface distributed temperature of the link by using a distributed temperature sensor installed along a longitudinal direction of the link; calculating a conductor temperature of the link on the basis of the surface distributed temperature and an electric current flowing through the link; calculating a heat flow emitted out of the link on the basis of the surface distributed temperature and the conductor temperature; and real-time calculating a thermal parameter of an environment around the link on the basis of the heat flow. Thus, it is possible to calculate operating conditions of the link more accurately and improve safety of electric power transmission by real-time calculating the thermal parameter of the environment around the link.

A battery calculating method, apparatus, and program are provided. The battery capacity calculating method and apparatus can very accurately calculate a residual capacity of a secondary battery especially in the last stage of discharging independently of environmental conditions such as a temperature or a deteriorated state. the battery capacity calculating apparatus is equipped with a voltage measuring circuit which measures the terminal voltage (Vmea) of a battery at the time of discharging, a current measuring circuit which measures the current value (I) of the battery at the time of discharging, and a control circuit which calculates a residual capacity and / or residual power. The operation unit in the control circuit calculates a discharged capacity (Qmea) and an apparent discharged capacity (Qocv) based on a terminal voltage (Vmea) and a current value (I) measured by the voltage measuring circuit and the current measuring circuit, respectively, estimates a discharge curve (Cpre) in the future including the last stage of discharging based on a capacity shift (ΔQ) being the difference between the discharged capacity (Qmea) and the apparent discharged capacity (Qocv) during discharging, and calculates the residual capacity and / or the residual power of the battery based on the estimated discharge curve (Cpre).

The invention discloses a calculation method of a battery pack actual capacity. The calculation method includes the following steps: (1) acquiring the value of the stress optical coefficient (SOC) SOC1 as an initial value when the battery pack just enters a working state. (2) acquiring the value of the stress optical coefficient (SOC) SOC2 as an end value when the battery pack stops working for a long time or enters the working state for the second time.(3) calculating the discharge capacity delta Qin the time quantum between SOC1and SOC 2. (4) calculating the actual capacity of the battery pack= delta Q / (SOC1-SOC2). If delta Q is less than a preset threshold value, then the currently detected data is deleted and the detection is carried out again. The preset threshold value is regulated according to the size of the different battery pack capacity. The calculation method of the battery pack actual capacity has the advantages that the calculation is simple; the realization of the calculation is simple, the actual capacity of the battery pack can be exactly calculated. The initial value and the end value of the calculation all chooses the value of the battery pack after standing so that the calculation can be exact and the calculation value is more close to the true value.

The present application discloses a control circuit for a power tool and a method for manipulating the power tool. The control circuit has a detection circuit for battery packs, a calculating control circuit, a battery capacity indicating circuit for indicating the calculation result of the battery capacity, and a current measure and calculating circuit for measuring the current flowing through motors. The calculation result further includes the voltages consumed by the battery pack internally and the discharge loop. The method for manipulating the power tool includes pressing the switch to electrically connect the motor and the battery pack, measuring the parameters of the battery pack and allowing the motor to operate or not according the measured parameters. Further, after the motor is in operation, the battery capacity is calculated and the results are displayed.

A main battery used as an electric power unit for a computer is provided with a memory that stores capacity information denoting the total capacity of a battery and compensation information representing the total capacity of the battery as a function of a battery charging cycle count. A CPU detects a cycle count of the battery according to an integrated charged capacity of the battery, thereby obtaining the total capacity with respect to this cycle count from the compensation information so as to compensate the capacity information according to the obtained total capacity.