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Hydrogen leakage detection method, hydrogen leakage detection system and hydrogen energy vehicle

A technology of leak detection and hydrogen energy, which is applied in measuring devices, measuring heat, and measuring the rate of increase and deceleration of fluids, etc., can solve problems such as good escape, affect vehicle operation safety, and cannot gather in time, so as to improve detection efficiency, Effect of avoiding hydrogen waste

Active Publication Date: 2021-09-28
WEICHAI POWER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, on the one hand, the density of hydrogen gas is small, the diffusion ability is strong, and the escape property is good. Even if a leak occurs, it can escape quickly and cannot gather around the hydrogen concentration sensor in time; Scattered, which leads to a limited number of hydrogen concentration sensors unable to monitor all areas where leakage may occur, resulting in hydrogen leakage in some areas not being detected in time, thus affecting the safety of vehicle operation

Method used

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  • Hydrogen leakage detection method, hydrogen leakage detection system and hydrogen energy vehicle
  • Hydrogen leakage detection method, hydrogen leakage detection system and hydrogen energy vehicle
  • Hydrogen leakage detection method, hydrogen leakage detection system and hydrogen energy vehicle

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Embodiment 1

[0042] This embodiment provides a hydrogen energy vehicle, including a hydrogen leakage detection system, the hydrogen leakage detection system can detect hydrogen leakage of the hydrogen energy vehicle in time, avoiding hydrogen waste and potential safety hazards caused by hydrogen leakage.

[0043] In this embodiment, the hydrogen energy vehicle is also provided with a lithium battery, and the lithium battery and the hydrogen fuel cell are connected in parallel to jointly provide power for the hydrogen energy vehicle. The hydrogen fuel in the hydrogen supply system provides hydrogen to the hydrogen fuel cell through the hydrogen supply pipeline, and the hydrogen fuel cell directly converts the chemical energy of hydrogen and oxygen into electrical energy to provide power for hydrogen energy vehicles. After the hydrogen energy vehicle is powered on, it can use the electric energy stored in the lithium battery to run purely electric. When the electric energy stored in the lithi...

Embodiment 2

[0048] This embodiment provides a hydrogen leakage detection method, which is applied to the hydrogen energy vehicle and the hydrogen leakage detection system provided in Embodiment 1.

[0049] A hydrogen energy vehicle includes a power-on state, a pure electric running state, a hydrogen fuel cell running state, and a power-off state. Leak detection. During the entire operation cycle of the hydrogen energy vehicle, the leakage of hydrogen gas can be monitored in real time to ensure the safe operation of the hydrogen energy vehicle.

[0050] The formula for calculating the mass of hydrogen gas is:

[0051]

[0052] Among them: P is the pressure detected by the pressure sensor in the hydrogen supply system; T is the temperature detected by the temperature sensor; in the power-on state, pure electric operation state and power-off state, the hydrogen switch valve of the hydrogen storage bottle and the pipe in the hydrogen supply system All the on-off valves of the hydrogen st...

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Abstract

The invention discloses a hydrogen leakage detection method and system and a hydrogen energy vehicle, and relates to the technical field of hydrogen energy vehicles. The hydrogen energy vehicle comprises a hydrogen fuel cell operation state, and the hydrogen leakage detection method in the hydrogen fuel cell operation state comprises the following steps: acquiring hydrogen consumption in a first set time, and calculating an actual use rate of hydrogen according to the hydrogen consumption in the first set time; obtaining a theoretical use rate of hydrogen of the hydrogen fuel cell within the first set time; calculating a difference value between the actual use rate of the hydrogen and the theoretical use rate of the hydrogen; judging whether the difference value between the actual use rate of the hydrogen and the theoretical use rate is within the difference value range of the set use rate or not; if not, judging that hydrogen is leaked. The problem that in the prior art, hydrogen leakage of partial areas cannot be detected in time is solved, and potential safety hazards caused by hydrogen waste and hydrogen leakage are effectively avoided.

Description

technical field [0001] The invention relates to the technical field of hydrogen energy vehicles, in particular to a hydrogen leakage detection method and detection system thereof, and a hydrogen energy vehicle. Background technique [0002] A hydrogen fuel cell is a power generation device that directly converts the chemical energy of hydrogen and oxygen into electrical energy. The basic principle is the reverse reaction of electrolyzed water. Hydrogen and oxygen are supplied to the anode and cathode respectively. After the hydrogen diffuses outward through the anode and reacts with the electrolyte, electrons are released to reach the cathode through an external load. Vehicles using hydrogen fuel cells have the characteristics of zero emissions, high efficiency, low noise and fast energy replenishment, and are considered to be ideal vehicle power plants to replace traditional internal combustion engines. [0003] The detection of hydrogen leakage is the key to ensure the sa...

Claims

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Application Information

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IPC IPC(8): G01M3/26G01K13/00
CPCG01M3/26G01K13/00Y02E60/50
Inventor 翟灵瑞乔运乾常会楷李森
Owner WEICHAI POWER CO LTD