The Role of Hydrogen Sensors in Toxic Gas Monitoring for Fuel Cell Vehicles

Hydrogen energy is a renewable energy source whose only by-product is water, and hydrogen has a wide range of sources. At present, hydrogen energy is widely recognized as a clean energy source. As a low-carbon and zero-carbon energy, it is rapidly emerging as a promising alternative. In recent years, China, the United States, Japan, Canada, the European Union and other countries and regions have all formulated hydrogen energy development plans. China has made remarkable progress in the hydrogen energy sector, and hydrogen fuel cells have become one of the most promising new energy sources today.

The hydrogen energy industry chain consists of three major segments: upstream hydrogen production, midstream hydrogen storage, transportation and refueling, and downstream fuel cells and related applications. There are two main ways to utilize hydrogen energy: one is direct combustion (hydrogen internal combustion engines), and the other is the application of fuel cell technology. Compared with hydrogen internal combustion engines, fuel cell technology features higher efficiency and thus greater development potential.

Hydrogen energy is widely applied in transportation sectors such as passenger vehicles, forklifts, rail transit and ships, as well as in energy storage. The hydrogen energy industry chain aligns with global environmental protection requirements. More importantly, the commercialization of hydrogen energy in China has just begun, making this year the inaugural year for large-scale hydrogen energy applications.

A hydrogen fuel cell is an energy storage device that uses hydrogen as its chemical energy carrier. Thanks to their high efficiency, low pollution and high energy density, fuel cells have received extensive attention from governments, enterprises and research institutions in recent years, showing broad application prospects in many fields. As a power generation device and a key downstream application of hydrogen energy, fuel cells can be used in automobiles, aerospace, building power supply systems, consumer electronics and other fields.

However, safety must be the top priority for the promotion and application of any new energy system. Hydrogen is highly volatile, flammable, explosive and prone to causing hydrogen embrittlement, which brings certain safety risks during its use. To prevent combustion or explosion caused by electric sparks igniting hydrogen, hydrogen fuel cells require sophisticated power control and battery management systems to maintain stable operation.

The hydrogen safety monitoring system for fuel cell vehicles mainly includes electrical components, hydrogen sensors, pipelines and valves, all made of explosion-proof, anti-static, flame-retardant, waterproof and salt-fog-resistant materials. Corresponding protection thresholds are set in the monitoring system. In the event of an abnormality, the hydrogen system controller transmits monitoring data to safety facilities, which then actuate timely disconnection or shutdown to keep the fuel cell vehicle in a safe state.

Fuel cells face certain risks of hydrogen leakage during production, storage and application. Hydrogen leakage reduces the performance of fuel cells. Meanwhile, as a flammable gas, excessive accumulation of hydrogen poses significant safety hazards. Therefore, hydrogen leakage detection is essential.

To address this need, we have developed a hydrogen sensor specifically designed for hydrogen leakage detection in fuel cells. Featuring high reliability and cost-effectiveness, this sensor serves as an ideal solution for hydrogen leakage monitoring in hydrogen fuel cells.