The invention discloses a cooling and filling method for a
hydrogen fuel used for a vehicle, and belongs to the technical field of gas fuel filling. The method is characterized by comprising the following steps of: (1) compressing and heating
hydrogen from a
hydrogen source by using a
hydrogen compressor; (2) exchanging heat with a cooling pipeline through a heat exchange pipeline in a cooling heat exchange device to cool the
compressed hydrogen in the heat exchange pipeline; and (3) connecting a filling gun of a filling and metering device with an on-vehicle hydrogen cylinder, and filling the compressed and cooled hydrogen into the on-vehicle hydrogen cylinder to finish filling. The method has the advantages that: not only the temperature of a
gas cylinder can be controlled in a safety loading condition, but also the requirement on rapid filing of the vehicle can be met to ensure the safety of a filling process of the vehicle. The hydrogen filling time is short; and the safety and stability effects are very good. The method is not only suitable for the hydrogen filling of an on-vehicle
gas cylinder under the pressure of 35 MPa, but also suitable for the hydrogen filling of the on-vehicle
gas cylinder under the pressure of 70 MPa.