143results about "Electrical testing" patented technology

The invention relates to an SOC and SOT combined state estimation method based on a power battery electric-thermal coupling model, and belongs to the technical field of battery management. The methodcomprises the steps of selecting a to-be-measured power battery, building the electric-thermal model of the power battery, and determining parameters needed for estimating the SOC and the SOT of the power battery; under different temperatures, conducting trickling charging-discharging experiments and HPPC experiments on the measured power battery, building a database of equivalent circuit model parameters relevant to the temperature and the SOC under a charging and discharging condition, and simulating field test working conditions under different road conditions to build the database; conducting parameter identification to obtain characteristic parameters of the electric-thermal model, and obtaining the quantitative relation between the equivalent circuit model parameters and the temperature and the SOC under the charging and discharging condition. By means of the SOC and SOT combined state estimation method based on the power battery electric-thermal coupling model, the model is combined with a PF algorithm and the quantitative relation of the equivalent circuit model parameters relevant to the temperature and the SOC under the charging and discharging condition of the power battery to achieve the SOC and SOT combined state estimation of the power battery.

The invention discloses a thermal runaway test analysis system for a lithium ion battery. The thermal runaway test analysis system comprises an experimental device, a testing device and a data collection and treatment system, wherein the experimental device comprises a heat-conducting pipe and a thermal insulation system; a resistance wire is wound on the outer wall of the heat-conducting pipe; the heat-conducting pipe is embedded into the thermal insulation system; a lithium ion battery mounting hole is formed in an inner cavity of the heat-conducting pipe and is used for mounting a to-be-tested lithium ion battery; a temperature sensor mounting hole is formed in the top end of the heat-conducting pipe and is used for mounting a temperature sensor; and the thermal insulation system is composed of a container and a heat-resisting insulating layer in the container. The thermal runaway test analysis system for the lithium ion battery, which is disclosed by the invention, is reasonable in structure, convenient to operate and diverse in function; thermal runaway of the lithium ion battery can be tested by the factors such as environment temperature, high-temperature environment, charge-discharge multiplying power and cooling condition by using the system; the collection accuracy of experimental data is relatively high; a data collection and analysis system is convenient to use; and the test accuracy can be ensured.

The invention discloses a storage battery detector and a vehicle-mounted network system for an intelligent automobile. The storage battery detector of the intelligent automobile comprises an input terminal, a current sensor, a temperature sensor, a charging and discharging current detection circuit, a voltage detection circuit, a temperature detection circuit, a microprocessor and a bus communication module, wherein the input terminal is partitioned into two paths; one path is connected with the current sensor; the current sensor is connected with the charging and discharging current detection circuit; the other path is connected with the voltage detection circuit; the temperature sensor is connected with the temperature detection circuit; the charging and discharging current detection circuit, the voltage detection circuit and the temperature detection circuit are connected with the microprocessor; and the microprocessor is connected with the bus communication module. The storage battery detector for the intelligent automobile is used for monitoring the insufficient voltage status of a storage battery, the charging status health condition and the like, and can be connected to the vehicle-mounted network system for protecting the insufficient voltage status of the storage battery, so that the service life of the storage battery is prolonged.

An on-position detecting method of single board includes sending command to test bus controller TBC by network management for driving said controller TBC to detect whether single board in system is on position or not, sending broadcast message by said TBC controller through bus of back board boundary scan test system, receiving said broadcast message by addressable scan port ASP then returning back response message and judging whether single board is on position or not by said scan port ASP according to content of said response message. The system for realizing said method is also disclosed.

A probe assembly for use in electrical measurement of a device under test. The probe assembly comprises a plate-like probe base plate with bending deformation produced in a free state without load, and a plurality of probes formed on one face of the probe base plate to project from the face. All the tips of the probes are positioned on the same plane parallel to an imaginary reference plane of the probe base plate.

An electric vehicle includes a control unit having overcurrent generation judgment unit, inverter selection unit, and inverter drive control unit. The overcurrent generation judgment unit judges whether an overcurrent is generated in an inverter for generation or an inverter for travel. When an overcurrent is generated in one of the inverters, the inverter selection unit selects the other inverter to be driven. The inverter drive control unit stops the driving of the one inverter and drives the other inverter to drive a travel motor or a generator.

A test access point structure for accessing test points of a printed circuit board and method of fabrication thereof is presented. Each test access point structure is conductively connected to a trace at a test access point and above an exposed surface of the printed circuit board to be accessible for probing by a fixture probe. The test access point structure may be designed and manufactured to permit deformation of the test access point structure upon initial probing of the test access point structure with a fixture probe to ensure electrical contact between the fixture probe and the test access point structure.

The invention relates to the fault diagnosis field, and especially relates to a temperature sensor fault diagnosis method and system. Temperature data of a housing of a single cell is obtained through software and hardware two modes respectively, and a comparison is made between the temperature data obtained through the two modes; if the test times in the multiple obtaining test process surpasses a reasonable times range, it is judged that fault occurs; then, analysis is carried out with abnormal information stored in an abnormal database being combined; and if the abnormal database does store the abnormal information, it is judged that fault occurs to a temperature sensor to be tested. The temperature sensor fault diagnosis method and system not only can prevent misjudgment of cell state due to fault of the temperature sensor, but also can greatly reduce redundancy quantity of the temperature sensor; abnormal database data does not need to be obtained in real time, and can only need to be obtained when fault is judged preliminarily; and effective utilization ratio of system resources can be greatly improved.

The invention discloses an electrostatic discharge test device, an electrostatic discharge test system and an electrostatic discharge test method. The electrostatic discharge test system comprises a support device, an insulation device, tested equipment, an electrostatic discharge test device, a test cable, and an electrostatic gun. The insulation device is arranged on the support device; the tested equipment is arranged on the insulation device, and comprises at least one tested port; the electrostatic discharge test device comprises at least one test port, the test port is a port which is formed by connecting one or more pins of a specific port with a shell, and the specific port is a port which is the same as the tested port; the test cable is used for connecting the tested port with the test port in turn, and the electrostatic gun is used for performing electrostatic discharge on the shell of the test port connected with the tested port. The technical scheme realizes performing electrostatic discharge test on the inner part of the tested equipment.

A battery voltage measuring system includes an analog/digital converter configured to receive a higher reference voltage and a lower reference voltage which is lower than the higher reference voltage and to outputs a digital output value based on an input voltage which is lower than the high voltage reference voltage and is higher than the low voltage reference voltage. A battery supplies a battery voltage as the higher reference voltage to the analog/digital converter; a first power supply supplies a first reference voltage as the input voltage to the analog/digital converter; and a second power supply supplies a second reference voltage as the lower reference voltage to the analog/digital converter.

The invention discloses a mobile terminal. The mobile terminal comprises a battery and a battery electric quantity display system, wherein the battery electric quantity display system comprises a power supply management chip, a control chip, an LED drive chip and an LED lamp array arranged in a shell of the mobile terminal; the shell includes a transparent region arranged above the LED lamp array; the power supply management chip is used for detecting residual electric quantity of the battery; and the control chip is used for controlling the LED drive chip to drive the LED lamp array to display a figure changed based on the residual electric quantity. The invention provides the mobile terminal for indirectly reflecting a change of electric quantity of a battery by displaying a change of a figure by the LED lamp array. The change of the figure is the change of one or more of figure color, shape and brightness, so that the displaying of electric quantity of the battery is more novel and interesting.

The present disclosure provides for an electronic sensor for detecting a root of a plant in soil, the electronic sensor that includes a first conductor plate configured to be disposed in soil, a switch, a power supply, and signal extractor. The switch is electrically coupled to the first conductor plate and is configured to switch between a first mode and a second mode. The power supply is electrically coupled to the switch and is configured to provide an electrical charge to the first conductor plate in the first mode of the switch. The signal extractor is electrically coupled to the switch and is configured to extract a signal response at the first conductor plate in the second mode of the switch. The present disclosure further provides a second conductor plate configured to be disposed in soil adjacent to and substantially parallel to the first conductor plate. The second conductor plate is electrically coupled to ground.

The invention provides a converter power module operation state monitoring device. The converter power module operation state monitoring device comprises a collecting unit, a processing unit, a storage unit, a fault display unit and an input and output unit. The processing unit is respectively connected with the collecting unit, the storage unit, the fault display unit and the input and output unit; the collecting unit is used for collecting converter power module operation information and transmitting the converter power module operation information to the processing unit and the storage unit; the processing unit is used for analyzing the converter power module operation information and comparing the converter power module operation information with a standard value so as to judge the operation state of a converter power module. Because the operation information of the converter power module is compared with the preset standard value range by the processing unit, the fault state of the converter power module can be accurately judged, the operation information of the converter power module can be output through the input and output unit, and accordingly the operation state of the converter power module can be monitored and recorded in real time.

The invention relates to a lithium battery dynamic peak power prediction method. The method mainly comprises the following steps: firstly, carrying out SOC-based continuous peak current estimation andequivalent circuit model-based continuous peak current estimation; solving peak current simultaneously meeting the dynamic voltage characteristic, the current limit value, the SOC and the temperatureconstraint of the battery; and obtaining the lithium battery peak power prediction power Pm under the multi-parameter constraint, predicting the lithium battery peak power Pn by using a BP neural network, performing difference comparison on the Pm and the Pn, and performing weighting processing to obtain a final lithium battery peak power prediction result.

The invention relates to a reactance relay and a re-closing method, the reactance relay is based on the current of a fault point of a mixed circuit of a high-voltage cable and a trolley wire, the reactance relay based on the current of the fault point is the reactance relay based on information of momentary current on two sides of the circuit, the momentary current on two sides of the circuit is utilized, capacitance current of a trolley wire circuit and a cable circuit and the current of a shunt reactor of the trolley wire are compensated, and the precise current of the fault point can be obtained by calculation. As for the mixed circuit of the high-voltage cable and the trolley wire without the shunt reactor, a protector on the trolley wire side is used for judging whether the re-closing is started or not, the protector on the trolley wire side always adopts the synchronous check way for superposition, the action range of the reactance relay is set to the junction of the trolley wire and the cable, if the reactance relay acts, a fault occurs in the trolley wire circuit, the re-closing is started, otherwise, the re-closing is locked. The re-closing is started when the fault occurs in the trolley wire of the mixed circuit, and the re-closing is locked when the fault occurs in the cable.

According to one embodiment, a digital protection relay includes an auxiliary transformer (2) which decreases a voltage of an electrical signal from a main circuit transformer (1) to a predetermined voltage; a detection resistance circuit (20) including a Π-type or T-type circuit including an input connected to an output of the auxiliary transformer (2); an analog detection circuit (3) which is connected to an output of the detection resistance circuit (20) and detects a quantity of electricity of an electrical signal from the auxiliary transformer (2); an A/D conversion circuit (4) connected to the analog detection circuit (3); a central processing device 5 which is connected to the A/D conversion circuit (5) and performs a protection operation; and a trip output contact (9) which is closed by processing of the central processing device (5) and operates an external breaker (21). In the digital protection relay, an input contact terminal 11 for inputting a test signal with a constant voltage from an external test device (13) to the analog detection circuit (3) as a signal corresponding to an output of the auxiliary transformer (2) is provided between the detection resistance circuit (20) and the analog detection circuit (3).

The invention relates to an alternating current signal collection and automatic calibration method. Firstly, a CPLD is utilized for receiving square wave signals generated by collection and shaping of an alternating current collection module hardware frequency measurement loop, the CPLD carries out frequency tracking and calculation on the square wave signals, equally-spaced N pulse signals are output to a DSP in each period according to a measured frequency value, the frequency value is sent to the DSP, and the DSP completes N-point alternating current signal collection of each cycle; then the DSP uses pulse signals received from the CPLD as starting references of alternating current signal collection, the collection of all channel alternating current signals is finished in T/N, and N-point sampling of each alternating current signal is finished in the period T; and finally, automatic calibration is carried out on the collected alternating current signals. The method provided by the invention has the advantages that the collection capacity is large, the remote measurement precision is high, the calibration method is simple, and the expandability and the easy maintenance of the product are greatly improved.

The invention discloses automatic detection equipment for producing a battery. The automatic detection equipment comprises a rack, wherein fixed frames are respectively arranged at two ends of the rack in a mutual symmetry manner; a detection rotating shaft is arranged on the inner wall, close to a rack, of the two fixed frames; a detection rotary table is arranged at one end, close to the outer walls of the fixed frames, of the detection rotating shaft; a reinspection rotary table is arranged at one end, close to the outer walls of the fixed frames, of the reinspection rotating shaft; an outlet rotary table is arranged at one end, close to the outer walls of the fixed frames, of an outlet rotating shaft; positioning grooves are formed in the outer wall of the detection rotary table; detection heads are arranged on the bottom surfaces inside the corresponding positioning grooves. The automatic detection equipment disclosed by the invention is convenient to assemble due to an uncomplicated structure and few components; the automatic detection equipment can be arranged at the unbroken position of a production process flow of the battery; a production line for integrated production and detection has high degree of automation; in addition, according to the automatic detection equipment disclosed by the invention, a formed battery is detected by adopting two detection tables, so that the detection efficiency is greatly ensured and leak detection is avoided.

The invention relates to a device and method for detecting an environmental parameter in a lithium ion battery explosion process. The device comprises a sealed observation device provided with an oxygen-free environment therein and an observation window; a clamping device for fixing a lithium ion battery, disposed in the sealed observation device and detachably connected with the sealed observation device; an electric signal input device disposed outside the sealed observation device and connected with the positive and negative poles of the lithium ion battery via wires; a data acquisition device disposed in the sealed observation device and fixedly connected with the sealed observation device; a data output device disposed outside the sealed observation device and connected with the data acquisition device via a wire. The device and method provide a safe detection environment for the explosion tests of the lithium ion battery, separate testing equipment from testing environment, and guarantee accurate environmental parameter acquisition in the lithium ion battery explosion process.

The invention discloses a multichannel battery sampling circuit and a sampling method thereof. The multichannel battery sampling circuit includes a battery pack, a channel switch unit, a battery voltage difference processing unit, a channel switch control unit, a micro-processing unit and a switch control circuit, wherein the battery pack is connected with an input end of the channel switch unit; an output end of the channel switch unit is connected with the battery voltage difference processing unit; an output end of the battery voltage difference processing unit is connected with the micro-processing unit; and an output end of the micro-processing unit is connected with the channel switch unit through the channel switch control unit. By adopting the structure, the invention has the advantages that, firstly, as the battery voltage sampling channels can be switched according to the logic control signals issued by the mirco-processing unit, the sampling method can improve the battery voltage detection precision and avoid the big power consumption during system hibernation; secondly, the system performance is improved; and thirdly, the system structure is optimized, and the reliability, the flexibility and the performance price ratio of the system are improved.

The invention discloses a novel transformer station secondary cable alignment device. The device comprises a detected end and a detection end which are respectively arranged at two ends of a to-be-detected secondary cable, and a voltage measurement device used for measuring a voltage of the two ends of the secondary cable, wherein the detected end is provided with a power source, a switch K1, N wiring ends and N+1 wiring resistors connected in series between the power source and the switch, and the N wiring ends are respectively connected with wiring nodes of any two adjacent wiring resistors. The device is advantaged in that through setting alignment terminals, the wiring resistors are arranged among the alignment terminals, all the wiring resistors are connected in series with a certain voltage, a voltage of any two points of each wiring terminal can be determined, so a voltage difference table can be made, through voltage measurement of the other end of the to-be-detected secondary cable, determination of corresponding labels can be carried out through a table query method, cable alignment can be accomplished, the device is integrally convenient and rapid, and low cost and high precision are realized.

The invention discloses a measurement circuit and method for an insulation monitoring instrument fault circuit. The measurement method comprises the steps that firstly, a low-frequency square-wave pulse signal with the positive electrode and the negative electrode symmetrical is generated inside an insulation monitoring instrument; secondly, a measurement loop is formed through high negative voltage, a full ground plane and an insulation resistor Rf-dc; thirdly, a sample voltage is generated on a sampling resistor Rm through current in the measurement loop; fourthly, the sample voltage is sent to a built-in microprocessor for acquisition, and the numerical value of the insulation resistor Rf-dc can be obtained by conducting calculation according to the redundant binary algorithm. The measurement circuit and method for the insulation monitoring instrument fault circuit have the advantages the measurement precision is high, reliability is high, safety is high, and the circuit and method are suitable for different environments.