Device for hydrogen fuel cell system and operation method thereof

A method for operating a hydrogen supply apparatus for a fuel cell system, the method comprising the steps of:

• providing a fuel cell stack;
• providing a hydrogen supply apparatus having a large-capacity hydrogen storage apparatus, a first shut-off valve, a small-capacity hydrogen storage apparatus, a second shut-off valve and a pressure reducing apparatus, the large-capacity hydrogen storage apparatus is coupled to the first shut-off valve, and the small-capacity hydrogen storage apparatus is provided between the large-capacity hydrogen storage apparatus and the fuel cell stack, the large-capacity hydrogen storage apparatus, the first shut-off valve, the small-capacity hydrogen storage apparatus, the second shut-off valve, and the pressure reducing apparatus are coupled to each other through a hydrogen pipeline, wherein the hydrogen storage capacity of the small-capacity hydrogen storage apparatus is less than or equal to one thousandth of the hydrogen storage capacity of the large-capacity hydrogen storage apparatus, wherein the small-capacity hydrogen storage apparatus and the second shut-off valve are coupled in parallel on the hydrogen pipeline starting from the large-capacity hydrogen storage apparatus to the fuel cell stack and are positioned before the pressure reducing apparatus, and wherein the cavity of the small-capacity hydrogen storage apparatus is filled with hydrogen;
• simultaneously opening the first shut-off valve and the second shut-off valve, and the high-pressure hydrogen supplying the hydrogen pipeline with hydrogen via the first pressure reducing valve;
• operating the fuel cell stack so that the small-capacity hydrogen storage apparatus is filled with hydrogen, and closing the second shut-off valve;
• and
• stopping the operation of the fuel cell stack, closing the first shut-off valve, opening the second shut-off valve, and releasing the pure hydrogen in the small-capacity hydrogen storage apparatus.

A method for operating a hydrogen supply apparatus for a fuel cell system, the method comprising the steps of:

• providing a fuel cell stack;
• providing a hydrogen supply apparatus having a large-capacity hydrogen storage apparatus, a first shut-off valve, a small-capacity hydrogen storage apparatus, a second shut-off valve and a pressure reducing apparatus, the large-capacity hydrogen storage apparatus is coupled to the first shut-off valve, and the small-capacity hydrogen storage apparatus is provided between the large-capacity hydrogen storage apparatus and the fuel cell stack, the large-capacity hydrogen storage apparatus, the first shut-off valve, the small-capacity hydrogen storage apparatus, the second shut-off valve, and the pressure reducing apparatus are coupled to each other through a hydrogen pipeline, wherein the hydrogen storage capacity of the small-capacity hydrogen storage apparatus is less than or equal to one thousandth of the hydrogen storage capacity of the large-capacity hydrogen storage apparatus, and wherein the small-capacity hydrogen storage apparatus and the second shut-off valve are connected in series along the hydrogen pipeline and are positioned after the large-capacity hydrogen storage apparatus and the first shut-off valve, and before the fuel cell stack;
• operating the fuel cell stack, simultaneously opening the first shut-off valve and the second shut-off valve, releasing the high-pressure hydrogen in the large-capacity hydrogen storage apparatus to fill the small-capacity hydrogen storage apparatus with hydrogen and supply hydrogen to the fuel cell stack at the same time;
• and
• stopping the operation of the fuel cell stack, simultaneously closing the first shut-off valve and the second shut-off valve, and opening the second shut-off valve after a period of time to release the pure hydrogen in the small-capacity hydrogen storage apparatus.