178 results about "Short-circuit test" patented technology

The invention provides an arc resistance characteristic-based segmented modeling method of a fuse for a direct current networking system, and relates to the technical field of common direct current bus system design, and the method comprises the steps: calculating the real-time arc resistance data of the fuse according to the continuously collected short-circuit voltage and short-circuit current at the two sides of the fuse in a short-circuit test process, and forming an arc resistance curve; intercepting an arc resistance curve from the peak moment of the short-circuit current to the slope descending moment of the arc resistance curve to obtain an arc starting stage arc resistance curve, and intercepting an arc resistance curve from the slope descending moment to the moment when the short-circuit current is zero to obtain an arc burning stage arc resistance curve; respectively carrying out data fitting according to the arc starting stage arc resistance curve and the arcing stage arc resistance curve to obtain a sectional arc resistance curve equation; and taking the arc resistance curve equation as a control signal to build and obtain a fuse simulation model based on the controlled resistor. The method has the advantages that the arc resistance curve is divided into two sections, the corresponding arc resistance curve equation is designed, the simulation precision is higher, and the method can be better suitable for different working conditions.

The invention provides a biphase composite magnetic material magnetically controlled reactor electromagnetic transient simulation method, device and equipment and a medium, and relates to the technical field of power equipment magnetic material testing and electromagnetic transient simulation. According to the invention, the test winding is arranged on the excitation winding of the magnetically controlled reactor, and multi-dimensional means of obtaining total iron loss through an open circuit test, obtaining magnetic hysteresis loss through a frequency reduction test, obtaining copper loss and leakage reactance through a short circuit test and the like are combined, so that separation of magnetic hysteresis loss, eddy current loss and additional loss can be realized; a high-fidelity hysteresis loop and a magnetic conductivity change rule are obtained, and the nonlinear characteristic and hysteresis response of the magnetic core can be accurately captured, so that the predictive capability of equipment performance and the sensing capability of an operation state are improved.

The utility model relates to the technical field of electronic testing, in particular to a test probe. The test probe is used for detecting a tested product, the test probe comprises a plurality of contact parts, the plurality of contact parts are located at one end of the test probe, and the plurality of contact parts can be contacted with the tested product at the same time. The contact area between the test probe and the tested product during the open and short circuit test is increased, and the good contact between the test probe and the tested product (such as an FPC extension socket) is realized, so that the high misjudgment rate of the open and short circuit test is improved, and the production efficiency of equipment is improved.

A method includes connecting an output of a switched capacitor converter to a battery, the switched capacitor converter comprising a first switch, a second switch, a third switch and an upper circuit connected in series, and a flying capacitor connected between a common node of the first switch and the second switch, and a common node of the third switch and the upper circuit, in a first short circuit testing step, determining whether the third switch is shorted by comparing a voltage on the common node of the third switch and the upper circuit with a first predetermined voltage reference, and in a second short circuit testing step, determining whether the first switch and the second switch are shorted by comparing a voltage on the common node of the first switch and the second switch with a second predetermined voltage reference and a third predetermined voltage reference, respectively.

The invention relates to a quick open and short circuit test dichotomy between any points of an IC wafer disc. A wafer bonding pad test channel is established based on a case board card framework, a test point TP corresponding to a wafer bonding pad is connected to N test unit board cards through a switch matrix, a connector and a carrier, and a power supply and communication link is formed by a backboard and a core control board. Each test unit board card executes an in-board dichotomy test and uploads an in-board open / short circuit initial determination result; the core control board executes an inter-board dichotomy grouping test on each slot position to determine a target board card set; and the test points TP of any two target board cards are divided into blocks and are positioned to the minimum block, point-to-point scanning is executed in the minimum block, and an open-short circuit positioning result is output. The method gives consideration to the configurable number of board cards and the multi-layer bipartite convergence path, and is suitable for the rapid open-short circuit positioning scene of the high-order-of-magnitude wafer bonding pad.

The invention discloses grid-connected box short-circuit test equipment, and belongs to the technical field of grid-connected boxes. The device comprises a test box, a support is slidably mounted in the test box, the support is fixedly connected with a mounting plate, the mounting plate is provided with an isolation assembly, the mounting plate is fixedly provided with a sealing box through a thread assembly, the sealing box is fixedly connected with a double-shaft motor, and rotating shafts are symmetrically and rotatably connected in the sealing box. When short-circuit testing operation is carried out on the grid-connected box, key elements such as a circuit breaker in the grid-connected box are placed on the mounting plate, all the elements are isolated through the separating plate, damage to nearby elements when the elements are short-circuited and damaged is reduced, wires of the grid-connected box are placed in the sealing box, the heater is started, and the short-circuit testing operation is carried out on the grid-connected box. The temperature in the sealing box is improved, the use of the wire in a high-temperature irradiation environment is simulated, and the accuracy of a test result is further improved.

The utility model relates to a conveying line square battery short circuit automatic detection device which is composed of a blocking and jacking positioning mechanism, a short circuit detection mechanism, a defective product removing mechanism and a classification caching mechanism, in the working process, a tray carries a square battery to a detection station, and after being blocked, the square battery is triggered to be jacked and positioned through photoelectric induction; the short-circuit detection mechanism is in contact with a battery through a probe, a PLC controls a short-circuit tester to complete detection, if a short circuit is found, the collaborative robot grabs defective products and places the defective products to the classification caching mechanism, and the tray is released after detection, the automation degree is high, safety accidents caused by the short circuit can be effectively prevented, the detection efficiency is greatly improved, the labor cost is reduced, and the reliability is high. An efficient and reliable solution is provided for short circuit detection of the square battery in the production, transportation and storage processes, and the method is suitable for the field of square battery production and logistics automation.

The invention discloses a high-density myoelectricity acquisition function test system and method, and relates to the field of test tools.The system comprises an analog multiplexer, a signal test module, a short circuit test module and an impedance test module; each channel of the analog multiplexer corresponds to each channel of the signal acquisition module or the impedance acquisition module; the signal test module is used for performing signal test on the signal acquisition module and judging whether the acquisition function of each channel of the signal acquisition module is normal or not; the short-circuit test module is used for realizing short-circuit test between adjacent channels of the signal acquisition module and judging whether the adjacent channels of the signal acquisition module are short-circuited or not; the impedance test module performs function test on the impedance acquisition module and judges whether the acquisition function of each channel of the impedance acquisition module is normal. The function test efficiency of the signal acquisition module and the impedance acquisition module is improved.

The present application belongs to the technical field of lithium ion battery detection, and particularly relates to a winding core short circuit test parameter optimization method, device and computer equipment. The winding core short circuit test parameter optimization method comprises the following steps: constructing a defect winding core sample library; taking voltage, plane pressure and test time as cooperative optimization parameters, performing full-factor experiments on the defect winding core sample library and normal control samples under different parameter combinations, obtaining a defect detection rate data set and a normal winding core damage rate data set; taking a defect detection rate not lower than a first threshold value and a normal winding core damage rate not higher than a second threshold value as an optimization target, determining an optimal parameter combination; and introducing the optimal parameter combination into a production line for trial operation verification, and determining final target test parameters according to a verification result. The present application solves the technical problems in the prior art, such as test parameter setting depending on experience, lacking systematic verification, not considering the key role of pressure parameters and being unable to balance high detection rate and zero damage rate.

In secondary batteries, this method efficiently performs short-circuit testing at locations with a high probability of short circuits. [Solution] The method includes the steps of: measuring a first surface temperature, which is the temperature of the end face of the electrode stack; connecting charge / discharge probes to the positive and negative terminals of the electrode stack and applying a current; measuring a second surface temperature, which is the temperature of the end face of the electrode stack when the current is applied; and determining whether or not a short circuit has occurred based on the difference between the first surface temperature and the second surface temperature.

An overhead line system short circuit test system comprises a short circuit connecting line, an installation device and an electric control device. The two ends of the short-circuit connecting line are connected with a contact line connecting mechanism used for being connected with a contact line and a rail connecting mechanism used for being connected with a rail respectively, the contact line connecting mechanism comprises a U-shaped line clamp and an insulation pressing block used for pressing the contact line on the inner side of the line clamp, and the insulation pressing block is connected with a power cylinder used for driving the insulation pressing block to move. The rail connecting mechanism comprises a clamping jaw used for clamping a rail, and the wire clamp and the clamping jaw are electrically connected with the short-circuit connecting wire. The installation device comprises a rail car used for transporting the short-circuit connecting line, and the rail car is provided with a lifting machine used for driving the contact line connecting mechanism to move and a medium supply mechanism used for providing a power medium for the power cylinder. The electric control device is used for supplying power to the test loop and monitoring electrical parameters. In the whole installation process of the short-circuit connecting line, a worker does not need to climb a line pole and a cantilever, the installation efficiency can be greatly improved, and danger is also avoided.

The utility model discloses a cylindrical battery external short circuit testing device, which comprises clamping plates (2) arranged at two ends of a battery (1), the inner sides of the clamping plates (2) are provided with fixing sleeves (3), the battery (1) is inserted in the fixing sleeves (3), the clamping plates (2) are provided with stabilizing pieces (8) for clamping the battery (1), the fixing sleeves (3) are internally provided with contact terminals (4), and the contact terminals (4) are connected with the fixing sleeves (3). One side, far away from the fixing sleeve (3), of the clamping plate (2) is provided with a power line (5) and a voltage temperature sensing measuring line (6) which are connected with the contact terminal (4); the position of the cylindrical battery (1) is limited through the fixing sleeve (3), the battery (1) can be stabilized and positioned through the stabilizing piece (8) and the fixing sleeve (3), the voltage and temperature sensing measuring line (6) can be directly connected with a multi-path thermodetector, voltage and temperature at the two ends of the cylindrical battery (1) can be effectively monitored, and failure analysis and research of the battery (1) are facilitated.

The utility model discloses a short circuit test tool, which comprises an insulating bottom plate and a conductive knife switch arranged on the insulating bottom plate, the insulating bottom plate comprises at least two plate bodies, an adjustable connecting rod is arranged between the plate bodies, and the distance between the plate bodies can be adjusted through the connecting rod; a first conductive seat and a second conductive seat are fixedly arranged at the positions, close to the front end and the rear end, of the insulating bottom plate respectively, the first conductive seat and the second conductive seat are located on the two plate bodies respectively, one end of the conductive knife switch is hinged to the first conductive seat, and the other end of the conductive knife switch is detachably connected with the second conductive seat. According to the short-circuit testing tool, transition is carried out through the conductive components such as the conductive knife switch and the conductive base, the spark phenomenon generated by direct contact of the two wires is prevented, meanwhile, the testing tool can be adjusted according to common requirements, installation is simpler, and adaptability to space changes is higher.

The application provides a segmented modeling method of a fuse for a direct current networking system based on arc resistance characteristics, relates to the technical field of common direct current bus system design, and comprises the following steps: calculating real-time arc resistance data of the fuse according to short-circuit voltages and short-circuit currents of two sides of the fuse in a continuously collected short-circuit test process to form an arc resistance curve; intercepting the arc resistance curve between a peak value moment of the short-circuit current and a slope drop moment of the arc resistance curve to obtain an arc resistance curve in an arc striking stage, and intercepting the arc resistance curve between the slope drop moment and a moment when the short-circuit current is zero to obtain an arc resistance curve in an arc burning stage; respectively performing data fitting according to the arc resistance curve in the arc striking stage and the arc resistance curve in the arc burning stage to obtain a segmented arc resistance curve equation; and building a fuse simulation model based on a controlled resistance by taking the arc resistance curve equation as a control signal. The beneficial effect is that the arc resistance curve is divided into two segments and corresponding arc resistance curve equations are designed, the simulation precision is higher, and the method can be better applied to different working conditions.

The invention relates to a miniature circuit breaker short circuit test device, and the device comprises a carrier which is used for carrying a plurality of circuit breakers in a first linear direction; the first contact module and the second contact module are located on the two sides of the carrier respectively, and the first contact module and the second contact module make contact with a circuit breaker loaded on the carrier; wherein the first contact module comprises a base and a sliding seat, the sliding seat is connected to the base in a sliding mode, the sliding seat is distributed on the base in the first linear direction, a first contact in contact with the circuit breaker can be installed on the sliding seat, an elastic block is connected between the sliding seat and the base, a telescopic limiting block is arranged on the base, and the limiting block is matched with the sliding seat; therefore, the relative position of the sliding seat and the base is limited. The single circuit breaker is disconnected from the first contact module and is connected with the test circuit, so that when the single circuit breaker breaks down, the safety of the power supply is protected in a mode of disconnecting from the first contact module.

The utility model discloses a short circuit testing device for a patch aluminum electrolytic capacitor seat plate, which relates to the technical field of capacitor processing, and comprises a seat plate and a capacitor, the upper end face of the seat plate is fixedly connected with a testing needle, the lower end of the seat plate is fixedly connected with a charging wire, a detection wire and a discharging wire, and is electrically connected with the testing needle. The charging wires, the detection wires and the discharging wire are arranged in sequence, the number of the charging wires is two, the number of the detection wires is five, the number of the discharging wire is one, a detection group is arranged at the upper end of the base plate, a data detector is fixed at the end part of the base plate, and a material distribution mechanism is arranged on the base plate on the outer side of the discharging wire; the utility model discloses a short-circuit testing device for a patch aluminum electrolytic capacitor seat plate. By arranging the detection group, charging, detection and discharging processes can be carried out on the capacitor, defective capacitors are removed, and then the process is added in the processing procedure, so that the yield of capacitor products is higher.

The utility model provides a movable short-circuit trolley for a hydropower station generator short-circuit test, which relates to the technical field of short-circuit tools and comprises a main body mechanism and a connecting mechanism. The connecting mechanism comprises a mounting plate, a telescopic rod is inserted into the mounting plate in a penetrating mode, a clamping plate is fixedly mounted at the telescopic end of the telescopic rod, a connecting plate is fixedly mounted on one side of the clamping plate, rubber pads are fixedly mounted on the inner walls of the clamping plate and the connecting plate, and fixing bolts are inserted into the clamping plate and the connecting plate in a penetrating mode. And the two fixing bolts are respectively in threaded connection with the clamping plate and the connecting plate. According to the utility model, the short-circuit bus and the leading-out terminal of the generator are respectively arranged between the clamping plate and the connecting plate, the fixing bolt is rotated to be in threaded connection with the clamping plate and the connecting plate, and the short-circuit bus and the leading-out terminal of the generator are fixed, so that the short-circuit bus and the leading-out terminal of the generator are connected to form a current path, and quick connection and disassembly are facilitated.

The utility model provides a locomotive signal integrated lamp box short circuit testing device, which is characterized in that a first socket is provided with n wiring terminals, and the ith wiring terminal of the first socket is electrically connected to a first testing terminal of a resistance meter through a switch normally-open terminal of an ith relay of a first relay unit in a multi-path relay control module; a switch normally-open end of an ith relay of a second relay unit in the multi-path relay control module is electrically connected to a second test end of the resistance meter; the control end of the ith relay in the first relay unit is electrically connected to the ith control end in the first group of control ends of the MCU controller; the control end of the ith relay in the second relay unit is electrically connected to the ith control end in the second group of control ends of the MCU controller; and the control input end of the MCU controller is electrically connected with the output end of the key input module. Therefore, the technical scheme specially used for the short-circuit test of the locomotive signal integrated lamp box is provided.

An electronic device has a molded package (e.g., a quad flat no leads package) with attached connectors. The molded package includes one or more semiconductor dies and is pretested prior to attachment of the connectors. Along these lines, such molded packages may be pretested in parallel at high volume due to their relatively small form factor (e.g., at numbers several times greater than those for testing leaded socket assemblies). Following such pretesting, the connectors are attached to the pretested molded package (e.g., by directly fusing the connectors to metallic pads on surfaces of the packaged integrated circuit via laser welding or soldering). Such electronic devices may be further tested if desired (e.g., opens / shorts tested) and encased within housings to form larger modules (e.g., accelerometers, pressure sensors, etc.).

The invention provides a short circuit test circuit and a test device, and relates to the technical field of semiconductor testing, and the short circuit test circuit comprises a drive circuit, a test control circuit, a first load circuit, a second load circuit and a switching circuit. The first controlled end of the test control circuit and the first end of the first load circuit are both used for receiving test voltage. The first end of the switching circuit is connected with the second controlled end of the test control circuit, the second end of the switching circuit is connected with the second end of the first load circuit, the third end of the switching circuit is connected with the first end of the second load circuit, the second end of the second load circuit is grounded, and the second load circuit comprises an inductive load; a first output end of the driving circuit is connected with a control end of the test control circuit, a second output end of the driving circuit is used for connecting a control end of a to-be-tested device, a first end of the switching circuit is used for connecting a first controlled end of the to-be-tested device, and a second end of the second load circuit is used for connecting a second controlled end of the to-be-tested device.

The invention relates to the technical field of smart power grids, and discloses a multi-dimensional monitoring method for a network construction type energy storage system based on a smart power grid, and the method comprises the steps: collecting the reaction data of the energy storage system during a short-circuit test, carrying out the preliminary analysis of the energy storage system according to the reaction data, and obtaining a qualified index; acquiring a short-circuit capacity ratio of the energy storage system and power output maintenance time under 0-90% voltage disturbance, and performing stability analysis on the energy storage system according to the short-circuit capacity ratio and the power output maintenance time to obtain a stability index; obtaining a power fluctuation value within the power output maintenance time, and adjusting the stability index according to the power fluctuation value to obtain a stability index final value; and obtaining a comprehensive monitoring value of the energy storage system according to the qualified index and the stability index final value, and generating a comprehensive report according to the comprehensive monitoring value. According to the invention, the energy storage system can be monitored from multiple dimensions, and the operation efficiency and safety of the energy storage system are improved.

The utility model discloses a novel position deviation detection jig for golden fingers on a flexible circuit board, and relates to the technical field of detection jigs, a plurality of golden fingers are arranged on the flexible circuit board at equal intervals, the distance between the central points of two adjacent golden fingers is Xmm, the width of each golden finger is Ymm, and the width of each golden finger is Ymm. According to the novel position deviation detection jig for the golden fingers on the flexible circuit board, the flexible circuit board to be detected is placed on the detection jig, so that the two wide edges, provided with the golden fingers, of the flexible circuit board are aligned with the two edges of the detection jig, and the detection pieces with the widths of Ymm and Xmm are sequentially arranged at intervals; when each golden finger horizontally deviates leftwards or rightwards by not less than (X-Y) / 2-0.02 mm, the condition that two golden fingers are simultaneously conducted with the same detection sheet exists at the moment, the detection sheet is short-circuited at the moment, and the flexible circuit board is judged to be a defective product and the offset of the golden fingers on the flexible circuit board is too large according to the display of disconnection / short circuit test equipment RT9601.

The invention discloses a packaging machine electric control box and junction box testing device and method, and belongs to the technical field of packaging machine testing. The device comprises a short circuit testing module, an external power supply module, a signal testing module and a man-machine interface industrial personal computer module; substation hot plugging, independent testing and multi-specification equipment compatibility are realized. The test method comprises the following steps: sequentially executing short-circuit test, signal test preparation, system initialization and to-be-tested specification selection, and then completing automatic self-diagnosis, parallel test and manual auxiliary test of digital quantity and analog quantity; the human-computer interface integrates the functions of progress marking, remote control screen switching and one-key testing. In order to solve the problems that a tested object is complex and multiple test points exist, high test efficiency is achieved through multiple means and functions such as signal self-diagnosis, test progress marking, multi-path parallel test and one-key test.

The invention discloses a de-embedding measurement method and system for electrical parameters of a passive device. The de-embedding measurement method comprises the following steps: constructing an original test circuit containing a passive device to be tested, removing the passive device to be tested in the original test circuit to obtain an open-circuit test circuit, and performing short-circuit on an open circuit of the open-circuit test circuit to obtain a short-circuit test circuit; respectively measuring S parameters of each test circuit to obtain an S parameter matrix, and performing parameter conversion to obtain a corresponding Y parameter matrix; according to the Y parameter matrix, calculating an admittance parameter of the to-be-tested passive device to the ground and an impedance parameter of the to-be-tested passive device after parameter stripping, and according to the admittance parameter and the impedance parameter, calculating a Y parameter matrix of the to-be-tested passive device after de-embedding; and performing parameter conversion on the Y parameter matrix of the passive device to be tested to obtain a corresponding S parameter matrix, and extracting the required electrical parameters of the passive device through the S parameter matrix of the passive device to be tested. According to the invention, high-precision de-embedding of the passive device can be realized, and the electrical characteristics of the device to be tested can be effectively obtained.

The utility model discloses an explosion-proof test box tool for lithium ion battery short circuit test, and relates to the technical field of electrical performance test. A to-be-tested battery is placed on one side of the top end of the bottom insulating plate, a wire connecting piece is installed at the position of a pole of the to-be-tested battery, a supporting mechanism is placed on one side of the top end of the bottom insulating plate, a clamping mechanism is arranged at the top end of the supporting mechanism, an internally-connected wire is installed between the wire connecting piece and the clamping mechanism, and a voltage clamp is arranged on one side of the internally-connected wire in a clamped mode. According to the utility model, the supporting mechanism is arranged in the explosion-proof box, the clamping mechanism is arranged at the top end of the supporting mechanism, the height of the supporting mechanism is steplessly adjusted, and the clamping mechanism stably clamps the internal wire connected with the pole of the battery to be tested, so that the internal wire is always in a horizontal stable clamping state; and the damage to the internal lead during short-circuit test of the battery is avoided.

The invention provides a driving method and device for a short-circuit test of a power semiconductor device, and belongs to the technical field of semiconductor testing. The driving circuit is electrically connected with the secondary side of the isolated power supply circuit and is configured to trigger the device to be tested to execute a short-circuit test based on an external control signal; the isolated power supply circuit is configured to enter a stop working state during a short circuit test based on the external control signal; and providing a working power supply for the driving circuit during the short-circuit test by using the energy stored by the isolation power supply circuit before entering the working stop state. According to the technical scheme, the low-voltage side device in the driving device can be prevented from being damaged due to exposure to high-voltage and large-current conditions in the short-circuit testing process of the to-be-tested device.

The utility model discloses a short circuit testing device for a cylindrical full-tab roll core, which relates to the technical field of chip testing and comprises a base, a pressurizing device is arranged in the middle of the base, testing mechanisms are respectively arranged on two sides of the pressurizing device above the base, each pressurizing mechanism comprises a sleeve, and an air bag is arranged in each sleeve. Each testing mechanism comprises a cylinder, a probe connector and a push rod, the cylinders are fixedly mounted on two sides of the base, the push rod is arranged at the output end of each cylinder, the probe connector is mounted at the tail end of each push rod, an anode probe is arranged in the middle above the probe connector, and a cathode probe is arranged in the middle of the probe connector of the other testing mechanism. According to the short-circuit testing device for the large cylindrical roll core, the lithium battery is placed on the platform in advance and positioned, the roll core of the large cylindrical battery is clamped through the expansive force of the pressurizing mechanism, and the probes are propped against the positive and negative ends of the roll core through the air cylinder, so that the stability and reliability of testing are improved, and the short-circuit testing device for the large cylindrical roll core is provided.

The invention discloses a ball head contact type igniter short circuit protector which comprises a protector base, a conductive contact seat, an insulating contact seat, a ball head mounting disc, a conductive contact ball head and a conductive sheet, wherein the conductive contact seat and the insulating contact seat are connected to the protector base through holes; the conductive contact ball head is connected to the outer ring of the ball head mounting disc through holes; an opening of the inserting and pulling pipe is connected to the middle of the ball head mounting disc; the plug tube is plugged into the plug tube connecting hole, so that the ball head mounting disc is in butt joint with the protector base, and in a service state, two conductive contact heads conducted through the conductive sheet on the ball head mounting disc are plugged into the two conductive contact seats, so that two poles of an igniter circuit are short-circuited; in a test state, the two conductive contact heads which are conducted through the conductive sheets on the ball head mounting disc are inserted into the two insulating contact seats, and the upper ends of the two conductive contact heads which are not connected with the conductive sheets are used as resistance test joints.

The application discloses a motor ground short-circuit fault detection method, and belongs to the technical field of a driver. The method comprises the following steps: before a servo driver drives a motor to operate, when the servo driver is powered on, reading hardware setting parameters of the servo driver, and setting a short-circuit test threshold value of the motor according to the hardware setting parameters; acquiring motor parameters and bus voltage of the motor, and setting a short-circuit detection signal pulse width according to the motor parameters, the bus voltage and the short-circuit test threshold value; controlling the servo driver to send corresponding driving signals to the motor according to the short-circuit detection signal pulse width, so as to perform a short-circuit ground test on the motor; and if the phase current of the motor in any one of U phase, V phase and W phase is greater than the short-circuit test threshold value, it is determined that the motor has a ground short-circuit fault. Through the method, whether the motor has a ground short-circuit fault can be simply and effectively judged, and normal and stable operation of the motor is ensured.