6 results about "Impulse testing" patented technology

Systems may include a hot solution supply and a cold solution supply utilizing flow controllers, temperature control units, valve systems, various temperature and pressure sensors, an inspection zone and recirculation systems. A method for thermal management and thermal impulse testing may include configuring a hot and cold solution system and monitoring temperature profiles in each system and alternating the flow of the hot and cold cycles then monitoring the components tested in the inspection zone.

The application provides a low-temperature double-pulse test platform and method, and relates to the technical field of power device testing.The platform comprises a refrigeration compressor, a cooling platform, an enclosure, an air extraction unit, a temperature acquisition unit, a parameter acquisition unit and a control unit.The control unit is used for acquiring surface temperature information of the power device to be tested, platform temperature information of the cooling platform and thermistor parameters under the action of a calibration pulse during the cooling process, determining the corrected equivalent junction temperature parameters of the power device to be tested, and controlling the double-pulse test loop to perform double-pulse testing when the corrected equivalent junction temperature parameters enter a target test temperature window.The method introduces a calibration pulse and thermistor parameters on the basis of a low-temperature environment, corrects and characterizes the actual thermal state of the power device to be tested, and controls the double-pulse testing time in combination with the target test temperature window, so as to improve the accuracy, consistency and repeatability of low-temperature double-pulse testing.

The application provides a double-pulse test voltage overshoot protection method, device and system, relates to the technical field of module testing, and is characterized in that the method comprises the following steps: determining a test working condition of double-pulse automatic testing, testing a plurality of preset working condition points under the test working condition, collecting load current, load voltage and turn-off speed of each test, wherein the load voltage under the test of any working condition point does not exceed a threshold value; determining a change curve of the turn-off speed with the load current under the test working condition according to the test of the preset working condition points and performing curve fitting, and further calculating the stray inductance under each test to fit; obtaining real-time load current corresponding to a target working condition point, and determining a target turn-off speed; wherein the target working condition point is a working condition point after the plurality of preset working condition points; determining a target load voltage; when the target load voltage exceeds the threshold value, stopping the test of the target working condition point, and solving the problem that voltage overshoot may occur in the existing double-pulse test process and there is a great safety hazard.

The embodiment of the invention provides a double-pulse test optimization method and a test parameter generation model training method. The method comprises the following steps: acquiring a working condition parameter and an index parameter of an inverter; wherein the working condition parameters and the index parameters are pairing data which are obtained under the same double-pulse test condition and have a one-to-one correspondence relationship; performing feature extraction processing on the working condition parameters and the index parameters to obtain feature vectors; inputting the feature vector into an initial intelligent model, processing the feature vector based on the initial intelligent model, and optimizing parameters of the initial intelligent model through a weighted objective function to obtain a test parameter generation model; wherein the test parameter generation model is used for processing the working condition parameters and the index parameters of the inverter to obtain test parameters; the test parameters are used for completing the double-pulse test of the inverter. The method is used for achieving the effect of improving the accuracy and execution efficiency of the double-pulse test.

This application relates to the field of power battery testing technology and discloses a high-precision testing system for the electrical performance parameters of power battery cells. The system acquires the terminal clamping status information of the cell under test, executes forward and reverse micropulse pre-excitation and collects voltage and current response results, extracts contact response characteristics, and generates contact stability judgment results, calibration validity judgment results, and test release results by combining zero-point drift results and link compensation results. After test release, the system executes main pulse testing, generates cell electrical performance parameter results and anomaly verification results, and outputs re-clamping or recalibration instructions. The system can distinguish between contact-side anomalies and test channel-side anomalies, improving the stability of cell electrical performance parameter test results and test processing efficiency.

The application provides a plugging structure for pressure pulse test of a car water bottle and a tool, and belongs to the technical field of pressure test, wherein the plugging structure comprises a metal inner core, the metal inner core has an external thread, the metal inner core is threadedly connected with a water bottle cover, and the metal inner core is used for replacing a pressure relief valve; when the water bottle cover is connected to a spout of an inflatable water bottle, the metal inner core isolates a pressure relief hole and an internal space of the inflatable water bottle. The plugging structure for pressure pulse test of the car water bottle can replace the pressure relief valve with the metal inner core, so that when the pressure in the inflatable water bottle is greater than 35 KPa during the test, the pressure relief can be avoided, and then the inflatable water bottle can be tested under the pulse pressure of 10 KPa-300 KPa.