Multi-environment integrative thermal management method for fuel cell vehicle

A multi-environment integrative thermal management method for a fuel cell vehicle, applied to a fuel cell thermal management sub-system of the fuel cell vehicle,

• wherein the fuel cell thermal management sub-system comprises a fuel cell system, a first pump, a first valve, a first heater, a second valve, a first radiator, and a first tank, the fuel cell system has a cooling liquid inlet and a cooling liquid outlet,
• the cooling liquid inlet is in communication with an output end of the first heater, an input end of the first heater is in communication with a first end of the first valve, a second end of the first valve is in communication with an output end of the first pump, an input end of the first pump is in communication with the cooling liquid outlet,
• the cooling liquid inlet is further in communication with an output end of the first radiator, an input end of the first radiator is in communication with a first end of the second valve, a second end of the second valve is in communication with a third end of the first valve,
• the first heater, the first valve, the first pump, and the fuel cell system form a minor circulating system, and
• the first radiator, the second valve, the first valve, the first pump, and the fuel cell system form a major circulating system;
• wherein the method comprises:
• detecting a current environment temperature T;
• and
• proceeding steps of a first control mode if the current environment temperature T is equal to or larger than an environment temperature threshold T1;
• and
• proceeding steps of a second control mode if the current environment temperature T is lower than the environment temperature threshold T1;
• wherein the steps of the first control mode comprises:
• acquiring a control variable selected from a pump rotational speed npump of the first pump, an opening degree α of the first valve, a fan on-off state ufan of the first radiator, and any combination thereof;
• performing a feedforward control of a fuel cell temperature of the fuel cell system by controlling the control variable;
• obtaining a current fuel cell temperature Tfc of the fuel cell system, and performing a feedback control of the fuel cell temperature according to a difference between the current fuel cell temperature Tfc and a target fuel cell temperature T2, to acquire a compensation amount;
• and
• making a compensation for the control variable in the feedforward control according to the compensation amount, thereby controlling the fuel cell temperature of the fuel cell system to reach the target fuel cell temperature T2.