Hydrogen safety test system of fuel cell vehicle

Abstract

The invention discloses a hydrogen safety test system of a fuel cell vehicle. The hydrogen safety test system comprises a hydrogen storage device, a hydrogen conveying pipeline connected with the hydrogen storage device, a first pressure sensor, a flow control device, a hydrogen concentration detection module and a test pipeline, wherein the first pressure sensor and the flow control device are arranged on the hydrogen conveying pipeline; one end of the test pipeline is used for being connected with a hydrogen conveying pipeline, and the other end of the test pipeline is used for being fixed to a potential leakage point of the fuel cell vehicle; and the hydrogen concentration detection module comprises a plurality of hydrogen concentration sensors. The hydrogen safety test system of the fuel cell vehicle simulates the flowing and leakage of hydrogen in the operation process of the fuel cell vehicle, detects the concentration of hydrogen leaked from the potential leakage point under theset pressure and the set flow by utilizing the pressure sensor, the flow control device and the hydrogen concentration sensors, and obtains the leakage condition of the potential leakage point; and the hydrogen concentration sensors are reasonably arranged according to the leakage condition, the safety of the whole vehicle is improved, potential safety hazards are reduced, unnecessary hydrogen concentration sensors are prevented from being arranged, and the cost of the whole vehicle is reduced.

Description

technical field [0001] The invention relates to the technical field of fuel cell vehicles, in particular to a hydrogen safety testing system for fuel cell vehicles. Background technique [0002] As a "zero-emission, pollution-free" vehicle, fuel cell vehicles are gradually being popularized and applied. Fuel cell vehicles usually use high-pressure gaseous hydrogen storage. High-pressure gaseous hydrogen enters the stack after passing through multi-stage decompression devices and pressure control devices, and electrochemically reacts with oxygen in the air. [0003] In fuel cell vehicles, the hydrogen system involves three parts: high pressure, medium pressure and low pressure. The pressure level of high pressure can usually reach 35MPa, even 70MPa; the pressure level of medium pressure is usually about 2MPa, and the pressure level of low pressure is about 300kPaA. [0004] Hydrogen systems consist of multiple components and modules, and there are multiple potential leak po...

AI Technical Summary

Problems solved by technology

If the hydrogen concentration sensor on the vehicle fails to detect the leakage and accumulation of hydrogen gas in time, it will easily lead to a large amount of hydrogen gas leakage and cause hydrogen safety hazards; if too many hydrogen concentration sensors are arranged, the detection cost will be high

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