231 results about "Voltameter" patented technology

Prior applications disclosed power supply transmission voltage resulting in reduced line losses, with further energy conservation via luminous intensity control (dimming) of lamp(s) including LEDs. Additionally, an invertible, convertable luminaire, and upgraded control module design (comparable to a computer mainframe) comprised of function components including, for example, a microcontroller with programmable CPU, multiple LED driver(s), multiple independent lamp control(s), variable ON time segmentation(s) and variable ramp speed(s), voice actuation (s), security system(s), battery charge component(s), voltage drop (current) limiter(s), protection, ammeter(s), volt and watt meter(s); and voids for optional modules including but not limited to: clock timer(s); photocell(s); motion detector(s) of various function(s); push button(s); programming and function display(s); microphone(s); wireless transmitter(s) / receiver(s); fiber optic interconnection(s); remote control(s); integration to personal computer(s) or other central control system(s); speaker(s); camera(s); irrigation control(s); luminaire mountable laser module(s) and beacon(s); battery array(s); transmission voltage double isolation for nominal 15 volt maximum wet contact.

A pass through wall power plug is equipped with multiple transceivers for remote communication. The power plug may be equipped with transceivers operative in different modes or protocols. The power plug may function as a bridge between radio devices. It may function as a centralized access point for receiving and / or storing information from and transmitting information multiple connected electronic devices. The power plug may be equipped with a night light, power meter, relay switch, voltage meter, beacon, proximity sensor or other electronic components. The power plug may be made rotatable around its prongs, and may be configured to be stackable within a standard column of electrical outlets.

The invention discloses a method for prolonging the service life of a mobile terminal in a low battery mode and the mobile terminal. The mobile terminal comprises a battery (2), a voltage detection module (6), a voltameter module (5) a CPU (4) and a display screen (3). The voltameter module (5) is used for detecting the power consumption electric current (I) and dump energy (Q) of the mobile terminal (1) in real time. The voltage detection module (6) is used for detecting the battery voltage in real time. The CPU (4) is used for changing the auto power-off voltage threshold value of the mobile terminal (1) when the dump energy (Q) is judged to be smaller than a preset electric quantity threshold value (Q0) and the power consumption electric current (I) is larger than a preset current threshold value (I0). The CUP (4) is also used for displaying prompt information that the mobile terminal is in low battery through the display screen (3) when the battery voltage value is judged to range between a second auto power-off voltage threshold value (V2) and a first auto power-off voltage threshold value (V1).

The electroconductive member has an electroconductive support and a surface layer formed on the electroconductive support, wherein the surface layer has a porous body having a continuous open pore, and the electroconductive member satisfies the following (1) and (2):(1) in a specific condition, a surface potential of the electroconductive member, after an elapse of 10 seconds since a completion of a discharge is 10 V or more; and(2) when applying a direct voltage between a polyethylene terephthalate film as a member to be charged and the electroconductive member, and charging the polyethylene terephthalate film, |Vd|≧|Vin|−|Vth| is satisfied within a range of |Vin|>|Vth|, wherein, Vd represents a charge potential of the polyethylene terephthalate film, Vin represents a voltage applied between the electroconductive member and the polyethylene terephthalate film, Vth represents a discharge starting voltage.

Provided is a secondary battery system including: a battery controller which controls charge and discharge of a secondary battery; a total controller which controls the entire system; an ammeter which detects a charge current and a discharge current of the secondary battery; and a voltmeter which detects a voltage of the secondary battery, in which a direct current resistance of the secondary battery at the time of charge and a direct current resistance of the secondary battery at the time of discharge are obtained on the basis of a current value and a voltage value detected by the ammeter and the voltmeter, to thereby determine a temporary increase in the direct current resistance of the secondary battery caused by charge and discharge with a large current on the basis of a relation between the two obtained direct current resistances. Accordingly, in a secondary battery system used in a hybrid system, a wind power generating system, a photovoltaic power generating system, and the like, the situation where a direct current resistance thereof transitionally (temporarily) increases is simply detected on the basis of the usage situation of a secondary battery, to thereby accurately calculate the deterioration state of the secondary battery and thus enable an appropriate coping process, so that the life of the secondary battery can be extended.

One example embodiment includes a PV module comprising a conductive backsheet, a non-conductive layer disposed on the conductive backsheet, a plurality of PV cells arranged in rows and collectively generating a first power output characterized by a first voltage, and a power conversion device. Each of the rows can include two or more PV cells. The PV cells within each row can be connected to eachother in parallel. The rows can be connected in series. A top row can be connected to the conductive backsheet. The power conversion device can be redundantly connected to a bottom row and to the conductive backsheet to form a complete circuit. The power conversion device can convert the first power output to a second power output characterized by a second voltage that is larger than the first voltage. The power conversion device can also maintain peak power of the PV cells.

The invention provides a pre-lithiation device and method for a lithium ion battery negative electrode pole piece with a controllable pre-lithiation degree. The method comprises the following steps: assembling a pole piece coated with a negative electrode material and a metal lithium sheet under an inert atmosphere to form a semi-battery model; connecting a resistor with a certain resistance valuebetween two semi-battery electrodes; carrying out pre-lithiation through discharging a battery; and connecting a voltmeter to monitor voltage of two poles. The aim of controllable pre-lithiation is realized through controlling the resistance value of the resistor, lithiation time and the voltage of the two poles and the like. After the pre-lithiation is carried out for certain time, the pole piece does not need to be dried and used electrolyte does not need to be replaced and can be directly assembled with a positive electrode pole piece to assemble the whole battery. The battery subjected tothe pre-lithiation of the method is charged and discharged under the current density of 0.5 to 1.0Ag<-1> and the first-week efficiency can reach 90 to 100 percent. The method is simple to operate, low in cost, good in pre-lithiation uniformity and controllable pre-lithiation degree; the electrolyte does not need to be replaced and the pole piece does not need to be dried after the pre-lithiationis carried out; and the method is suitable for industrial popularization and application.

The invention provides a Bluetooth portable power source. Information of the Bluetooth portable power source is displayed on a mobile phone, and the Bluetooth portable power source is controlled through the mobile phone. The Bluetooth portable power source comprises a portable power source body, wherein the portable power source body is provided with a Bluetooth module, a charge and discharge control module and a voltameter module, the charge and discharge control module and the voltameter module are connected with the Bluetooth module, and the Bluetooth module is provided with an information transmission unit. According to the Bluetooth portable power source, low-power-consumption Bluetooth is used for data transmission, no information is displayed on the Bluetooth portable power source, the information is displayed on the mobile phone, electricity quality of a battery is accurately calculated, the calculation error is 1%, and the Bluetooth portable power source receives control instructions from the mobile phone to complete the autodyne function, the anti-lost function, the article searching function and the like; when the Bluetooth portable power source is in communication with other external devices through a USB interface, acquired data are transmitted to the mobile phone to be displayed through Bluetooth, and the mobile phone processes the data through a network, and guides a user. Therefore, cost is reduced, the phenomenon that a portable power source manufacturer marks data falsely is avoided, the necessary product, namely the portable power source, is changed into an intelligent product more than a charging device, and many additional functions are integrated.

The invention provides a method and device for detecting the battery charging state of a terminal device. The method comprises: detecting whether to start the charging of the terminal device, and if so, acquiring the charging state information of the battery of the terminal device; acquiring the temperature data of the battery in real time by using a voltameter and sending the temperature data to a master control module for analysis and judgment; determining that the battery is in a normal charging state when the master control module detects that the temperature data is within a preset safety section; stopping charging the battery when a first preset condition is satisfied; switching off the terminal device when a second preset condition is satisfied; and recharging the battery when a third preset condition is satisfied. The method stops charging the battery, restarts charging the battery, and switching off the terminal device according to the different conditions satisfied by the temperature data, and adjusts the control state according to the change of the temperature data, thereby ensuring the safety of the charging.

The invention discloses an automatic arcing device for a vacuum consumable electric-arc furnace. A consumable electrode is arranged at the bottom of a furnace chamber; an auxiliary electrode is arranged above the consumable electrode; the upper end of the auxiliary electrode is connected with an electrode stem; the upper end of the electrode stem is connected with a transmission shaft; a differential mechanism / speed reducer is arranged at the upper end of the transmission shaft; the differential mechanism / speed reducer is connected with a feeding motor and a fast motor; a programmable controller comprises an output module, an input module, a CPU (Central Processing Unit) and a communication port; arc voltage measuring leads are respectively led out from the electrode stem and a housing of the furnace chamber; the other ends of the arc voltage measuring leads are connected with a signal transformer and then connected with the input module of the programmable controller; a voltage meter is connected with the signal transformer in parallel; a displacement sensor is also connected with the input module; and the output module and the input module are both connected with a motor controller. The invention further relates to a method for controlling arcing by using the arcing device; and the electrode stem is driven by the motor to strike an arc. The automatic arcing device for the vacuum consumable electric-arc furnace, disclosed by the invention, has the advantages of high arcing success rate, high arc distance control precision and high finished product ratio.

The invention provides a parallel lithium ion battery pack virtual connection and internal resistance increase fault identification method. The battery pack is formed by connecting n single batteriesin parallel, the parallel battery pack is regarded as a battery, and the total current, tab voltage, total voltage and surface temperature of the battery are recorded. The battery impedance is identified on line based on the equivalent circuit model and recursive least square, and if the battery impedance is greater than a threshold value, it is determined that an impedance increase fault exists.The impedance standard deviation is further calculated, if the impedance standard deviation is greater than the threshold and the duration is greater than the preset time, it is determined the fault is virtual connection, and otherwise, it is determined that the internal resistance is increased. If the tab voltage of the battery i is lower than that of other batteries during charging and higher than that of other batteries during discharging, the battery i is in virtual connection; and if the battery i does not exist and the temperature of the battery j is higher than that of other batteries,the internal resistance of the battery j is increased. When the temperature difference between the batteries is greater than 5 DEG C, it is determined that a first-stage fault occurs. Identification,positioning and grading of virtual connection and internal resistance increase faults of the parallel battery pack can be realized.

The invention provides a data verification method and device and a computer readable storage medium. The method comprises the steps of determining a block to be verified, wherein the block to be verified includes data addresses of multiple pieces of data, and the data addresses of the multiple pieces of data re continuous; according to a first verification file of the block to be verified, performing processing according to a verification rule to complete verification. According to the scheme, a correspondence relation between bytes and the data addresses of the data is established, whether ornot the corresponding data needs to be verified is calibrated through the content of the bytes, and the subsequent data which does not need to be verified can be fast skipped by browsing the bytes ofcharacter strings, so that the data verification method and device and the computer readable storage medium are well applied to a scene of voltameter data verification, and the voltameter data verification is completed fast and accurately.

The invention relates to a test method of reactance parameters of a surface permanent magnet synchronous motor, and the test method comprises the following steps: 1) test devices are selected and the preparation is carried out, 2) the test process is carried out, 3) test data is analyzed, 4) the calculation is carried out according to the following Ld and Lq; the steps for selecting the test devices are as follows, a variable frequency meter, a current meter and a voltage meter are selected; the steps of the test process are as follows, when in test, a rotor is slowly moved, the maximum and the minimum of the current which is extracted by the current meter are observed, the voltage value of a power supply is recorded simultaneously; the steps for analyzing the test data are as follows, the main test data which is the resistance and the reactance value of the motor is calculated by a reactance parameter expression; the Ld and Lq calculation steps are as follows, the direct-axis synchronous reactance Ld and the quadrature-axis synchronous reactance Lq are measured for the permanent magnet synchronous motor with the sine wave power supply. Compared with the methods of the prior art, the method can more conveniently measure the reactance parameters of the surface permanent magnet synchronous motor by the simple test devices, thereby having certain economic benefit.

A device for predicting remaining capacity of a battery and a method for the same are disclosed. The device is embedded in a battery pack or externally coupled thereto. The device includes a program for proceeding an algorithm of cell capacity calculation, a database stored in a non-volatile memory having a table of open-circuit voltage, a table of current gain and a capacity conversion equation. The program generates a discharging curve according to the cell temperature and load accessed and corrects the database according to the battery voltage and the discharging curve and the coulomb counter.

The invention discloses a coulombmeter case, which comprises at least two case bodies, a case cover and other assembly devices, wherein the lower part of each case body is provided with a routing channel, a routing channel clapboard and a switch base; the routing channel clapboard divides the routing channel into an upper layer and a lower layer; moreover, the lower end of each case body is divided into a wire lead-in chamber and a wire lead-out chamber through a vertical clapboard and a wire-pressing block. The coulombmeter case has the characteristics of safety, economical efficiency, electricity stealing prevention, multiple functions, simple manufacturing process, strong commonality and flexible configuration, etc.

The invention discloses a constructing method and a device for a single-chamber medium-free algae microbial fuel cell. The single-chamber medium-free algae microbial fuel cell is prepared by: A) a step of algae microorganism screening, namely a step including 1) algae microorganism enrichment, 2) separation and purification; and 3) algae microorganism screening to obtain an algae microorganism suspension; and C) a step of adding the obtained algae microorganism suspension into the device. The algae microorganism suspension is added into a glass container. An anode carbon rod and a cathode carbon rod are inserted into the glass container. The cathode carbon rod is coated with nitrocellulose. The anode carbon rod and the cathode carbon rod are connected to two ends of a resistance, an amperemeter and a voltmeter through wires. The amperemeter is connected in series between the anode carbon rod and the resistance through wires. The voltmeter is connected in series to the two ends of the resistance and the amperemeter through wires. One side of the anode carbon rod faces light. The method and the device have characteristics of simple operation, simple structure, using convenience, no need of proton exchange membranes and electronic media, high efficiency, and capability of degrading organic pollutants at the same time of effectively utilizing light energy to generate power.

An electrical safety system and associated method may be used on an electrical enclosure containing phase to phase and phase to ground electricity. The system includes a volt meter having a probe and a receptacle having a number of ports adapted to receive the probe of the volt meter. The receptacle is mounted to a panel, cabinet or enclosure having at least one conducting wire therein. The method allows a worker to use a contact voltage detector to check for the presence or absence of voltage inside the closed electrical panel.

The invention discloses a 3-series 2-parallel Li-ion battery pack protecting board. The protecting board is formed by combining a rigid printed circuit board PCB and a flexible printed circuit board PCB; the FPC undertakes the circuit connection of a 3-series 2-parallel Li-ion battery pack. The protecting board is provided with a protecting circuit, and the protecting circuit comprises a basic protecting function, a second-grade protecting function, a senior charging control, an advance charging function, a voltameter function , balance function and other circuit modules. The 3-series 2-parallel Li-ion battery pack protecting board is simple and new in structure and reasonable in circuit design; the 3-series 2-parallel Li-ion battery pack protecting board meets the electrical connection ofan electric core, forms an effective safety protection to the use of the Li-ion battery, and greatly reduces the happening of safety accident of the battery, thus the safety of the Li-ion battery isimproved. The protecting board can communicate with a PC upper computer through an SMBus interface and is convenient to monitor the Li-ion battery and realize the man-machine interaction; the 3-series2-parallel Li-ion battery pack protecting board has wide market application prospect, enriches user experience and is significant to produce and practice.

The invention provides a leakage current detection method and a mobile terminal. The method is applied to the mobile terminal. The method comprises the following steps of when a shutdown operation instruction is received, sending a first control instruction to a voltameter of the mobile terminal so that the voltameter collects a current value of a cell circuit of the mobile phone under a shutdown state; according to the current value collected by the voltameter, calculating a shutdown current value of the cell circuit; determining whether the shutdown current value is greater than a preset leakage current threshold; and when the shutdown current value is greater than the preset leakage current threshold, emitting a prompting message. In the invention, current collection under a shutdown state is realized; and a problem that the mobile terminal can not detect a leakage current under the shutdown state is solved.

The invention provides a battery internal short circuit judgment method, equipment and electronic equipment. The method comprises the steps that a charge capacity charged into a battery in a preset voltage interval and a discharge capacity used in the preset voltage interval are acquired respectively; and whether the battery has an interval short circuit or not is judged according to the charge capacity and the discharge capacity. According to the battery internal short circuit judgment method, whether the battery has the internal short circuit or not can be effectively judged according to theacquired charge capacity charged into the battery in the preset voltage interval and the acquired discharge capacity used in the preset voltage interval; and meanwhile, the charge capacity and the discharge capacity can be acquired through a voltameter, the electronic equipment is provided with a voltameter inside, and therefore the problem that an application scene is limited can be solved.

A system for automatically collecting transformer oil-paper insulation recovery voltage, including a PC, an electrostatic meter, and an experimental transformer. The PC is connected to the electrostatic meter through serial port communication, and the electrostatic meter is connected to the experimental transformer; the electrostatic meter includes a high-voltage DC power supply and an electric meter measurement module The high-voltage DC power supply is connected to both ends of the experimental transformer to form a charging circuit; the meter measurement module is connected in parallel to both ends of the experimental transformer and the high-voltage DC power supply to form a discharge circuit and a test circuit. Compared with the prior art, the present invention has the advantage that the conversion of each stage in the measurement process of the present invention is realized by using the characteristics of the internal voltmeter and ammeter of the electrometer, and the whole process is controlled by software, which can automatically measure the recovery voltage and draw the polarization spectrum And the feature quantity is extracted, the wiring is simple, and the application is flexible.

A method and system for predicting the time required for low voltage expression of a secondary battery, including (a) obtaining a leakage current by inputting a voltage of a battery cell of the secondary battery, measuring a freezing resistance of a battery cell, and dividing an input voltage by a measured freezing resistance, (b) obtaining a discharge capacity difference by setting a reference value of a voltage drop for selecting a low voltage defect and obtaining a discharge capacity difference between the input voltage and a voltage dropped therefrom by the reference value, and (c) dividing the discharge capacity difference by the leakage current to thereby calculate a time required for low voltage expression.

The invention discloses a method and a device for managing battery parameters. The method comprises the following steps: obtaining the newest parameters of a battery by monitoring the working condition of the battery; storing the newest parameters of the battery to a server end; and when the battery works again, updating the battery parameters currently used by a terminal system according to the newest parameters of the battery obtained from the server end. According to the method and the device, the newest parameters of the battery are transmitted to the server end for storage, and when the battery works again, the newest parameters corresponding to the battery are obtained from the server end, namely the updating of the battery parameters can be finished, so that the matching of the terminal battery and the battery parameters is guaranteed, the use of a built-in voltameter for the battery is avoided, and then the cost of the battery is reduced.

The invention relates to a laser trimming method of a zeropoint resistor of a pressure chip of a ceramic pressure sensor, which is characterized by comprising the following steps: firstly, respectively connecting a trimmable resistor on the two bridge arms of Wheatstone bridges in series; secondly, applying 5V direct-current voltage to the Wheatstone bridges; thirdly, carrying out real-time measurement on voltage values between the two electrodes of the Wheatstone bridges by utilizing a high-precision digital voltameter, i.e. connecting the anode of the high-precision digital voltameter with connecting points between the two fixed resistors of the Wheatstone bridge of each side and connecting the cathode of the high-precision digital voltameter with the cathode of a power supply to respectively carry out measurement to obtain the voltage values U1 and U2 of the two Wheatstone bridge; and fourthly, inputting the measured two voltage values U1 and U2 into a laser trimmer, comparing the two voltage values, and trimming the resistor required to be trimmed by utilizing a laser beam the light spot area of which is not greater than 0.0484mum<2> to make (U1-U2) = 0+ / -0.5mV. The invention has high degree of automation, good consistency and high product qualification ratio and improves the production efficiency by more than 20 times.

The invention provides a method and a system for estimating an open-circuit voltage on line based on a gas-liquid dynamics battery model. The method comprises the following steps: estimating a first open-circuit voltage of a battery through a gas-liquid dynamics open-circuit voltage battery model; looking up an open-circuit voltage-capacity table according to the first open-circuit voltage to obtain a first capacity; taking the first capacity as an initial value, and obtaining a second capacity by using a micro-step ampere-hour integral method; looking up a capacity-open-circuit voltage tableaccording to the second capacity to obtain a second open-circuit voltage; estimating a end voltage of the battery through a gas-liquid dynamics end voltage battery model; calculating a coefficient matrix and a covariance matrix of an extended Kalman filtering algorithm of the gas-liquid dynamics open-circuit voltage battery model; and updating the coefficient matrix and the covariance matrix of the extended Kalman filtering algorithm of the gas-liquid dynamics open-circuit voltage battery model, and then circulating to finish online identification of model parameters and online estimation of the open-circuit voltage of the battery. According to the method, model parameters and initial values do not need to be identified or recognized before the open-circuit voltage of the battery is estimated.

An insulation resistance measurement system of a battery pack comprises a voltage source, a voltage meter, and a microprocessor. The voltage source is located outside the battery pack. The voltage source applies an output voltage to a first electric terminal and a second electric terminal. The voltage meter measures a first voltage level between the first electric terminal and a housing, and measures a second voltage level between the first electric terminal and the housing when resistance is electrically connected between the first electric terminal and the housing. The voltage meter measures a third voltage level between the second electric terminal and the housing, and measures a fourth voltage level between the second electric terminal and the housing when resistance is electrically connected between the second electric terminal and the housing. The microprocessor determines first insulation resistance on the basis of the first voltage level, the second voltage level, and the third voltage level.

A integrated tested of electric motor car is featured as pre-reserving test ports of three lead out lines of Hall A, B and C elements; Hall element positive electrode power supply; low potential; speed control line of rotary handle; controller master power supply positive electrode; lamp circuit and controller master power supply negative electrode when electric motor car is assembled then inserting said ports into port of said integrated tester for carrying out test on electric motor car.