A hydrogen fuel cell vehicle heating device and heating control method

Abstract

The invention relates to a heating device and a heating control method of a hydrogen fuel cell vehicle; the heating device comprises a heating water circuit provided in the cooling system of the fuelcell stack for heating the interior of the vehicle. After the heating water circuit is connected in parallel with the radiating water circuit where the radiator is located, which is connected in series with the cooling water circuit of the fuel cell stack. A first flow control valve is disposed in the heating waterway, and a second flow control valve is disposed in the cooling water passage. The heating device further comprises a heating controller for controlling the opening degrees of the first flow control valve and the second flow control valve, and the heating controller is respectively connected with the first flow control valve and the second flow control valve. Compared with the prior art, the invention adds a flow control valve to both the cooling water circuit and the heating water circuit, and realizes the flow distribution of the two water circuits in real time to satisfy the heat dissipation of the fuel cell stack while ensuring the heating effect of the whole vehicle, andimproves the use efficiency of the heat at the same time.

Description

technical field [0001] The invention relates to a vehicle heating technology, in particular to a hydrogen fuel cell vehicle heating equipment and a heating control method. Background technique [0002] Vehicle heating is a universal technology used in vehicles. For general vehicles, the residual temperature of the engine water cycle can be used for heating. Due to the immature technology of fuel cells in the early stage, PTC (electric heating) is generally used for heating, and pure PTC is used for heating. Waste of power. [0003] Later, with the development of technology, the waste heat of fuel cell heat dissipation began to be used. For example, Chinese patent CN206148542U discloses a fuel cell vehicle cooling cycle system and fuel cell vehicle, in which the heating waterway is connected to the fuel cell cooling waterway. The upper fuel cell dissipates heat and heats up together. However, since the flow ratio of the heating waterway and the fuel cell waterway is constant...

AI Technical Summary

Problems solved by technology

[0002] Vehicle heating is a universal technology used in vehicles. For general vehicles, the residual temperature of the engine water cycle can be used for heating. Due to the immature technology of fuel cells in the early stage, PTC (electric heating) is generally used for heating, and pure PTC is used for heating. wasting power

[0003] Later, with the development of technology, the waste heat of fuel cell heat dissipation began to be used. For example, Chinese patent CN206148542U discloses a fuel cell vehicle cooling cycle system and fuel cell vehicle, in which the heating waterway is connected to the fuel cell cooling waterway. The upper fuel cell dissipates heat and heats up together. However, since the flow ratio of the heating waterway and the fuel cell waterway is constant, and the flow rate of the fuel cell radiator is generally greater than the flow rate of the heating waterway, when the power required by the vehicle is relatively small, the fuel cell stack as a whole The lower the reaction speed, the lower the required power of the overall cooling system will be. In this case, the flow rate of the water pump will be reduced due to the decrease of the overall flow rate, which in turn reduces the flow rate and heat exchange power of the heating water circuit. The heating effect is not good when the fuel cell radiator is small. it is good

Images