Vehicle fuel cell thermal management system and control method thereof

Abstract

The invention discloses a vehicle fuel cell hydrothermal management system which comprises a first heating loop, a second heating loop, a third heating loop, a first cooling loop, a second cooling loop, a deionized water circulation system, a fuel cell stack and a control system; the first heating loop is a fuel cell stack heating loop, and the temperature of a fuel cell stack is increased by heating a cooling liquid through a PTC heating device; the second heating loop is a passenger compartment auxiliary heating loop, and the PTC heating device directly supplies heat to a passenger compartment; the third heating loop is a fuel cell passenger compartment heating loop, and the passenger compartment is heated through waste heat generated by work of the fuel cell stack; the first cooling loop is a radiator cooling loop, and heat generated by working of the fuel cell stack is transferred to the radiator through the heat exchanger and exchanges heat with the outside; and the second cooling loop is an air-conditioning auxiliary cooling loop and assists the heat dissipation of the fuel cell stack by utilizing phase-change heat transfer of a refrigerant of the air-conditioning system.

Description

technical field [0001] The invention belongs to the technical field of automobiles, and in particular relates to a fuel cell thermal management system for a vehicle and a control method thereof. Background technique [0002] With the rapid development of automobile technology, the requirements for environmental protection are increasing year by year, the research and development of new energy vehicles is becoming more and more mature, and various power sources are applied to the automobile field. As a new type of energy conversion device, fuel cells have been paid attention to due to their advantages such as high efficiency and cleanliness. Among them, the proton exchange membrane fuel cell system has the advantages of no pollution, zero emissions, long driving range, and strong environmental adaptability, and has broad research and application space. Compared with traditional internal combustion engine vehicles, temperature is an important factor restricting the performanc...

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Problems solved by technology

[0007] The present invention aims to solve the problem of starting the existing thermal management system in low temperature environment, and provides a fuel cell thermal management system for vehicles and its control method. The battery works in a suitable temperature range, and the high-efficiency liquid-liquid heat exchange method is used to improve the heat exchange efficiency, so as to improve the working efficiency of the fuel cell, reduce hydrogen consumption, improve work reliability, prolong the service life of the fuel cell, and improve the comfort of the passenger compartment, etc. Purpose

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