Thermal management system and method for multiple fuel cell modules

Abstract

The present invention provides a thermal management system and method for jointly using multiple fuel cell modules by using fuel cell heat as liquid hydrogen vaporization power. The thermal managementsystem and method are suitable for a fuel cell system using static drainage technology. Liquid hydrogen cannot be directly used by a fuel cell and is required to be vaporized by heat into gaseous hydrogen to be used as an incendiary agent of the fuel cell fuel. A fuel cell module using static drainage technology requires stable and precisely controllable water pressure. In order to ensure that the water pressure of various module does not interfere with each other in the case of jointly using multiple modules, a single-module-level first-stage thermal circulation circuit is formed by connecting each fuel cell module in series with two separate heat exchangers, and two-stage thermal circulation circuits are formed by the two heat exchangers connected in series with each module respectively, that is, the heat of the fuel cell is divided into two parts, one of which is used for the vaporization of the liquid hydrogen, and the other of which is dissipated through a radiator.

Description

technical field [0001] The invention belongs to the field of fuel cells, and in particular relates to a thermal management system and method for a multi-fuel cell combined system using liquid hydrogen as a fuel. Background technique [0002] With the depletion of traditional energy sources such as petroleum, the use and development of new energy sources have attracted widespread attention from the society, especially the proton exchange membrane fuel cell, as a new generation of energy power, has many advantages such as quietness, environmental protection, and high energy density. , can be widely used in aerospace, navigation, automobiles, power stations, military and other fields, and is regarded as one of the main power sources for the next generation of human beings. [0003] Proton exchange membrane fuel cells use the chemical reaction of hydrogen and oxygen to generate electricity. Liquid hydrogen has an ultra-high hydrogen storage energy density, and is especially sui...

AI Technical Summary

Problems solved by technology

[0004] The vaporization of liquid hydrogen requires heat. Although the traditional electric heating method can satisfy the vaporization of liquid hydrogen, it consumes electric energy and has potential safety hazards due to the introduction of electric heating.

Images