Vehicle fuel cell waste heat management system and method

Abstract

The invention discloses a vehicle fuel cell waste heat management system and method, relates to the technical field of automobiles, and aims to form a vehicle low-cost combined heat and power supply system through special parts such as a heat exchange plate, a three-way valve and an electronic water valve on the basis of meeting the original functions. Waste heat generated by work of the fuel cellsystem is utilized to coordinate and control temperature rise, cooling, water heating in the vehicle and the like of the fuel cell system. Meanwhile, the problems of rapid temperature drop of the cooling medium of the fuel cell system, poor power generation performance, increased refrigeration load in summer and the like caused by large temperature difference of cooling mediums at two sides of the heat exchange plate are solved through the waste heat management system and each control strategy. Through a judgment strategy of signals of a first temperature sensor and a second temperature sensor, a first water pump, a electronic fan of a fuel cell radiator, an electric heater and the like are intelligently adjusted in real time, temperature lag or advanced control can be avoided, and meanwhile electric energy consumption of whole vehicle heat management can be reduced.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a fuel cell waste heat management system and method for vehicles. Background technique [0002] A fuel cell is a high-efficiency power generation system that directly converts the chemical energy in the fuel into electrical energy through an electrochemical reaction. This electrochemical reaction is a static power generation method that obtains electricity without object movement, and is not limited by the Carnot cycle. Therefore, fuel cells have the advantages of high efficiency, low noise, and no pollution, which ensures that fuel cells can be used in automobiles and will become efficient and clean automobiles in the true sense. [0003] The operating temperature range of fuel cells for vehicles is 60-80°C, and the energy conversion efficiency is generally above 50%. The remaining energy is mainly dissipated in the form of heat, generating waste heat equivalent to the power...

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Problems solved by technology

[0004] However, when driving in winter, fuel heaters, electric heaters, electric heaters, and heating and cooling air conditioners are generally used for heating the cockpit and / or passenger compartment of new energy vehicles. Significant shortcomings such as difficulty in layout, high energy consumption of the whole vehicle in winter, and even exhaust emissions and noise pollution

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