261 results about "Short-circuit test" patented technology

An open and short circuit testing device and method. The device comprises a base (1), a support frame (2), a test board (5) and a placement frame (4). The test board (5) is slidably connected to the side opposite to the support frame (2), and the test board (5) moves downwards to drive a gear (14) to rotate; a limiting plate (17) is used for limiting reverse rotation of the gear (14); and a probe (26) is used for connecting to a circuit board to achieve testing. Under normal conditions, the friction force when the probe (26) is inserted into a wiring terminal (29) is less than the minimum elastic force of a second spring (25), when the probe (26) fails to be normally connected to the wiring terminal (29), the probe (26) is pressed downwards when a movable plate (23) moves downwards, the probe (26) is adjusted by means of the second spring (25) at the top of the probe (26), so that the probe (26) returns to normal, the pressure sensor (31) detects whether there is an abnormality, and when the second spring (25) at the top of the probe (26) is compressed, the pressure sensor (31) at the top of the second spring (25) measures an excessively large pressure value, i.e., indicating that a device abnormality occurs during the testing process rather than representing that there is necessarily a problem with the circuit board to be tested itself, thereby improving the accuracy of the testing result.

The invention belongs to the technical field of battery detection, and particularly relates to a new energy power battery short circuit test cabinet, which comprises an explosion-proof cabinet, the explosion-proof cabinet is provided with a transmission cabin and a test cabin, and a transmission system, a termination system and a power-on system are arranged in the transmission cabin. In order to avoid deflagration of a circuit in a test process and reduce damage to detection equipment, an impact transmission system and a termination system are arranged, a mechanical transmission mode is utilized, short-circuit wiring of a battery is immediately interrupted when the battery explodes, impact force generated by explosion is directly converted into mechanical action, a signal conversion process is not needed, and the detection efficiency is improved. Compared with the prior art, the device has the advantages of higher response speed, higher extreme environment resistance and lower manufacturing cost, and can effectively reduce the damage of explosive shock waves to the test cabin in the test process.

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 invention discloses a high-frequency transformer high-frequency oscillation analysis method and system considering stray parameters of a power supply line under high-frequency square wave excitation. According to the method, an open-circuit and short-circuit test means is adopted to obtain impedance parameters of the high-frequency transformer, and distribution parameters such as power supply line resistance, parasitic inductance and parasitic capacitance of the high-frequency transformer are obtained through impedance characteristic test. On this basis, a distribution parameter model of the high-frequency transformer is constructed, and order reduction splitting is performed on the distribution parameter model on the premise of neglecting capacitance between windings, so that a low-order sub-circuit model easy to analyze is formed. And the equivalent distribution parameter sub-circuit model obtained through reduced-order splitting is utilized to analyze and calculate the response of the transformer port voltage and the winding current under high-frequency square wave excitation, and detailed analysis of the waveform of the high-frequency transformer and research of the high-frequency oscillation characteristic are realized. The method can quantify the specific influence of the parameters of the high-frequency transformer on the oscillation characteristics, provides guidance for the suppression and elimination of high-frequency oscillation, and guarantees the efficient and stable operation of the high-frequency transformer.

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.

The invention relates to the technical field of batteries, and provides a battery short-circuit testing device and a battery short-circuit detection method, and the method comprises the steps: obtaining a current signal and a voltage signal in a battery operation process, carrying out the de-noising processing, obtaining a de-noised current signal and a de-noised voltage signal, and constructing a current and voltage dynamic characteristic spectrum; generating a short-time current and voltage characteristic mapping matrix, and performing hierarchical clustering analysis on the short-time current and voltage characteristic mapping matrix to obtain a short-circuit evaluation result; and comparing the short-circuit assessment result with a preset risk degree, and if the short-circuit trend of the short-circuit assessment result exceeds a preset safety range of the risk degree, generating a short-circuit alarm signal. The current signal and the voltage signal are processed and analyzed, the detection threshold value is dynamically adjusted to adapt to different use environments, the detection sensitivity and accuracy are enhanced, and the problems that the threshold value adaptability is poor, and the false alarm or missing alarm phenomenon is likely to be caused when the battery is in different use environments and battery types are solved.

The invention provides welding equipment for a cylindrical battery cell collector plate. Comprising a first magnetic drive line, and a battery cell feeding mechanism, a battery cell code scanning mechanism, a first collector plate welding mechanism, a battery cell overturning mechanism, a second collector plate welding mechanism, a short circuit testing mechanism, a pressing mechanism, a length detection mechanism, a dust removal mechanism, a battery cell detection mechanism and a battery cell discharging mechanism which are sequentially arranged in the conveying direction of the first magnetic drive line, wherein the first magnetic drive line comprises a plurality of first rotors, battery cell clamps are assembled on the first rotors, and the first rotors bear battery cells from the battery cell feeding mechanism; and the battery cell passes through the battery cell code scanning mechanism, the first collector plate welding mechanism, the battery cell overturning mechanism, the second collector plate welding mechanism, the short circuit testing mechanism, the pressing mechanism, the length detection mechanism, the dust removal mechanism and the battery cell detection mechanism in sequence to the battery cell discharging mechanism to complete welding and detection work of the positive collector plate and the negative collector plate of the battery cell. The system is high in integration level, and facilitates the improvement of the working efficiency.

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 utility model relates to a pre-failure short circuit testing device for a gapless metal oxide arrester, which is characterized in that voltage is continuously applied to a to-be-tested arrester, and voltage at two ends of the arrester and current flowing through the arrester are monitored at the same time until the to-be-tested arrester reaches a pre-failure testing device. Through the testing device with a simple structure, the testing requirement of lightning arrester pre-failure short circuit in the international standard IEC 60099-4 is met; meanwhile, one testing device can meet the requirements of to-be-tested lightning arresters of different specifications.

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 utility model belongs to the technical field of testing, and provides a wire harness short circuit testing device. The wire harness short circuit testing device comprises a first indication module, a first switch module, a second switch module, a sliding module, a power supply, a first clamping arm and a second clamping arm, and the first switch module is connected with the first indication module, the sliding module and the negative electrode of the power supply. The sliding module is respectively connected with a positive electrode of the power supply and all tested wire harnesses on a vehicle, the second switch module is respectively connected with the first indication module and a first wire harness, the second clamping arm is arranged on the sliding module, the first clamping arm is used for fixing the first wire harness, and the second clamping arm is used for fixing the second wire harness. And the second clamping arm is used for fixing a target wire harness to be tested in all the wire harnesses to be tested. The wire harness short-circuit testing device provided by the utility model can ensure the preciseness and safety of the wire harness short-circuit test, and meanwhile, ensures that the test is not influenced by human factors.

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.

The invention provides a short-circuit risk assessment method, system and device for an energy storage system and a medium, and the method comprises the steps: obtaining historical temperature data, fitting a temperature change curve according to the historical temperature data, and dividing the temperature change curve into a plurality of temperature detection curves; acquiring historical load data, and fitting a load change curve according to the historical load data; setting a plurality of detection SOC nodes and a plurality of detection times, and matching the temperature detection curve, the load change curve, the detection SOC nodes and the detection times to generate a plurality of test conditions; and performing short-circuit test on the battery according to the test condition, and performing short-circuit risk assessment on the battery according to the test result. According to the invention, the problem that the state change of the battery in the use process cannot be comprehensively reflected because the short-circuit test of the battery in the prior art is a no-load static working condition and the constraint conditions are few is solved.

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 utility model relates to the technical field of FPC testing, and discloses a module FPC open and short circuit testing device which comprises a testing support, a plurality of groups of transmission belts used for conveying FPCs are installed on the testing support, and a protective outer frame is fixedly connected to the testing support. The inner wall of the protective outer frame is provided with two groups of open and short circuit testing mechanisms used for FPC open and short circuit testing. Through cooperation of the test support, the conveyor belt, the positioning mechanism, the open-short circuit test mechanism, the CCD positioning camera device and the operation display screen, the FPC body is moved to a position below the CCD positioning camera device by using the conveyor belt and is lifted and fixed through the positioning mechanism, and then the position of an electronic component is shot. Therefore, the open and short circuit testing mechanism is controlled to detect the open and short circuit of the connection point of the electronic component, the recognition efficiency of the connection condition of the electronic component on the FPC body is improved, the open and short circuit testing efficiency of the FPC body is improved, and the FPC production efficiency is improved.

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.