Test device and method for detecting security of fuel battery passenger car hydrogen feed system

Abstract

The invention relates to a test table for testing the security of a hydrogen supply system of a fuel cell bus and the test method thereof, and belongs to the security technology field of the fuel cell bus. The test table comprises a hydrogen supply system simulation device, a main control computer, an electrical control cabinet, a high pressure hydrogen bottle and a hydrogen detector, wherein the hydrogen supply system simulation device is connected with the output mouth of the high pressure hydrogen bottle, and bilaterally connected with the main control computer; the main control computer is connected with the electrical control cabinet, the high pressure hydrogen bottle and the hydrogen detector; the electrical control cabinet is respectively connected with the high pressure hydrogen bottle and the hydrogen supply system simulation device; the test table further comprises a bench for fixing and supporting the hydrogen supply system simulation device. The method comprises the following steps: a valve to be tested is connected with an identical valve in a pipeline of the hydrogen supply system simulation device in parallel; the working state of the valve to be tested is simulated; according to data such as gas pressure, flow, hydrogen concentration, etc. in an acquisition pipeline, whether the performance of the valve to be tested is qualified can be judged. The test table is used for dynamically testing the security of the key components of hydrogen supply system of the fuel cell bus.

Description

technical field [0001] The invention belongs to the technical field of fuel cell passenger car safety, in particular to the safety detection technology of a hydrogen supply system. Background technique [0002] At present, with the rapid development of fuel cell bus technology, the safety of fuel cell bus hydrogen supply system has attracted more and more attention. The fuel cell bus hydrogen supply system consists of high-pressure hydrogen cylinders, high-pressure solenoid valves, overflow valves, pressure reducing valves, hydrogen detectors, pipelines, and pipeline connectors. After starting the fuel cell, the high-voltage solenoid valve will be opened to open the gas source, and the hydrogen will enter the interior of the fuel cell through the overflow valve and the pressure reducing valve. If the high-pressure solenoid valve does not work properly, the air source cannot be turned on or off. If there is an abnormality in the overflow valve or pressure reducing valve, wh...

AI Technical Summary

Problems solved by technology

If the high-pressure solenoid valve does not work properly, the air source cannot be turned on or off

If there is an abnormality in the overflow valve or pressure reducing valve, when the hydrogen flow in the pipeline exceeds the rated flow of the fuel cell, or the outlet pressure of the pressure reducing valve is higher than the rated pressure of the fuel cell, the gas source cannot be cut off, so it is easy to damage the fuel cell or Reduced service life of fuel cells

Under normal circumstances, the pressure in the hydrogen cylinder reaches 20~35MPa. If there are cracks in the pipeline or pipeline joints, it will easily lead to a large amount of hydrogen leakage and increase the safety hazard of deflagration.

Based on the potential safety hazards in the hydrogen supply system of fuel cell buses, the performance of each component of the hydrogen supply system must be tested before loading, but there is currently no relevant test platform for comprehensive testing of the safety of the hydrogen supply system for fuel cell buses

Existing component performance tests are separated from the actual vehicle working environment and conditions, and cannot correctly evaluate the performance of various components of the fuel cell bus hydrogen supply system, and cannot meet the safety testing requirements of the vehicle hydrogen supply system

In general, it is difficult to carry out component safety testing on real vehicles

Images