The utility model relates to the technical field of
hydrogen storage equipment, in particular to a
gas supply device, a
bottleneck combination valve and a
hydrogen storage
bottle group. The air supply device comprises an air supply pipeline, a
valve seat, an air supply one-way valve, an overflowing protection valve and a filtering mechanism. The
valve seat, the air supply one-way valve, the overflowing protection valve and the filtering mechanism are all arranged in the air supply pipeline; the air supply one-way valve is used for making contact with the
valve seat and sealing the air supply pipeline when bearing preset
pressure difference larger than the first direction. The overflowing protection valve is used for making contact with the valve seat and sealing the air supply pipeline when bearing the preset
pressure difference larger than the second direction. By arranging the
gas supply one-way valve, in the
hydrogen filling process, high-pressure hydrogen is prevented from passing through the high-pressure
electromagnetic valve, and then the influence of temperature and
flutter on the service life of the high-pressure
electromagnetic valve in the filling process is avoided; when the downstream pipeline of the
bottle opening combination valve is broken and the flow is increased abnormally, the
gas supply pipeline is closed through the overflowing protection valve, and
abnormal discharge is avoided.