Insulation impedance testing device and method for fuel cell testing

Abstract

The invention discloses an insulation impedance testing device and method for fuel cell testing. The device comprises a feedback type electronic load AC output, a feedback type electronic load and aninsulation monitor. The two wiring ports of the feedback type electronic load AC output are connected with the wiring end of a feedback type electronic load through a connected power line. A feedbacktype electronic load input negative electrode is fixedly arranged on one side of the front surface of the feedback type electronic load; a feedback type electronic load input positive electrode is fixedly arranged on the other side of the front surface of the feedback type electronic load; the insulation monitor is arranged in the feedback type electronic load; a high-voltage sampling negative electrode of the insulation monitor is communicated with an input negative electrode of the feedback type electronic load through a first connecting wire. According to the device, the insulation monitoris arranged in the feedback type electronic load, and a CAN operation interface is arranged so that the integration number of a fuel cell test bench is reduced, the equipment redundancy degree is reduced, and the stability of the fuel cell test bench is improved.

Description

technical field [0001] The invention relates to an insulation resistance testing device, in particular to an insulation resistance testing device and method used for fuel cell testing, and belongs to the technical field of fuel cell testing devices. Background technique [0002] With the vigorous promotion of energy saving and environmental protection, new energy electric vehicles will become more and more common in daily life due to their advantages of energy saving and no emission. Compared with traditional internal combustion engine vehicles, electric vehicles use an electric drive system, and there is high voltage inside, and the existence of high voltage will involve the overall insulation assessment, especially with the increase of the service life of the vehicle, the system operation such as vibration, temperature and humidity and other environmental changes In any case, it may lead to a decrease in its overall insulation performance. Such changes will endanger the s...

AI Technical Summary

Problems solved by technology

[0005] (1) The user buys an insulation detector and adds it to the test bench, which makes the bench messy;

[0006] (2) When the user needs to know the high insulation resistance under the current test conditions, a separate upper computer display interface is required to communicate with the insulation monitor to read the resistance value, so the actual user operation is cumbersome;

[0007] (3) Adding an insulation monitor continues to increase the power supply line of the insulation monitor, and the communication line of the insulation monitor needs to be added, so the stability is poor;

[0008] (4) A platform has multiple monitoring and alarm functions, which may easily cause users to confuse the alarm.

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