Hydrogen fuel cell automobile hydrothermal management system and control method thereof

Abstract

The invention relates to a hydrogen fuel cell automobile hydrothermal management system which comprises a fuel cell, a main water pump and a heater which are sequentially communicated through a pipeline to form a circulation loop, and further comprises a first three-way valve, an inlet of the three-way valve I is communicated with an outlet of the fuel cell through a pipeline, and one outlet is communicated with the main water pump through a pipeline, the other outlet is communicated with an inlet of heating equipment in an automobile passenger cabin through a pipeline, and an outlet of the heating equipment is communicated with a pipeline between the three-way valve I and the main water pump through a pipeline; a pipeline between the fuel cell and the heater is communicated with a pipeline between the three-way valve I and the heating equipment through a heating loop, and a valve is mounted on the heating loop; the invention further provides a control method of the hydrogen fuel cellautomobile hydrothermal management system. The system has the beneficial effects that the flowing path of cooling liquid is optimized when the automobile passenger cabin does not need to be heated, the heating capacity in the automobile passenger cabin is improved while normal operation of the system is guaranteed, and energy consumption is reduced.

Description

technical field [0001] The invention relates to a water heat management system for a new energy vehicle, in particular to a water heat management system for a hydrogen fuel cell vehicle and a control method thereof. Background technique [0002] The technology of fuel vehicles using the waste heat of the engine water cycle for heating has become very common. With the development of hydrogen fuel cell vehicle technology, the heating method has changed from a separate ptc water heating circuit (electric heating) at the beginning to the integration of it into hydrogen fuel vehicles. The water and heat management system of the battery utilizes the waste heat generated during the operation of the fuel cell stack, which is more energy-saving and environmentally friendly. [0003] At present, in the thermal cycle management system of the vehicle fuel cell in the prior art, the temperature of the liquid at the inlet of the hot end of the heat exchanger will not be higher than the te...

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Problems solved by technology

[0003] At present, in the thermal cycle management system of the vehicle fuel cell in the prior art, the temperature of the liquid at the inlet of the hot end of the heat exchanger will not be higher than the temperature at the outlet of the stack, and what participates in the heating of the cabin is the warm water flowing through the heat exchanger connected in series. The fluid at the cold end of the air core has a certain temperature difference between the liquid at the cold end of the heat exchanger and the liquid at the hot end, so the heat exchange efficiency is low. Most of the energy in the heating circuit is provided by the PTC heater connected in parallel with the heat exchanger, and the waste heat utilization The effect is limited; at the same time, the warm air core in the independent cabin heating circuit must be close to the cabin and cannot be integrated into the fuel cell system. Therefore, the pipeline of this part of the circuit is longer, which increases the number of components and makes the entire water heat management system It becomes more complicated, and the difficulty of operation and maintenance increases; in addition, the heating effect of the cabin is limited by the temperature of the circulating water coolant, and the energy consumption is relatively large

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