Portable proton-exchange membrane fuel cell power system

Abstract

The invention discloses a portable proton-exchange membrane fuel cell power system, which relates to the technical field of a fuel cell. The system mainly comprises a fuel cell stack, a metal hydrogen storage cylinder, an air inlet valve, an exhaust valve, an axial flow fan, an air filter, a direct current (DC)/DC module, a storage battery and a power management module. Air needed by reaction is provided for the fuel cell stack by the only one fan, the fuel cell stack is also cooled by the fan, and the metal hydrogen storage cylinder is heated by the fan; the system adopts the fuel cell stack cooled by air, so that a humidification device is not needed; the system is simple and compact in whole structure, has energy-saving and environment-friendly effects, is low in running cost and convenient to carry and has a wide application scope.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a portable proton exchange membrane fuel cell power system. Background technique [0002] The proton exchange membrane fuel cell is an efficient and clean energy source. Because it is not limited by the Carnot cycle, the theoretical electrical efficiency is as high as 80%. Water is the only product and has no pollution to the environment. Therefore, it is considered to be the ultimate energy source for the development of human society. It has broad application prospects in large-scale power stations, backup power supplies in various industries, and vehicle power supplies. [0003] Proton exchange membrane fuel cells use hydrogen as fuel and oxygen in the air or pure oxygen as the oxidant. The two gases undergo electrochemical reactions in the fuel cell stack to generate electricity, heat and water. Since the proton exchange membrane can only work at a certain humidity, i...

AI Technical Summary

Problems solved by technology

The so-called water-cooled stack is to design a water channel in the stack and use water to cool the stack. The cooling effect is good, but the structure of the stack is complicated, which increases the weight and volume of the entire system; the air-cooled stack is controlled by the fan. Cool down the electric stack at a certain speed. This type of electric stack has a simple structure and is easy to control. It is very suitable for portable power supply systems.

However, the current portable fuel cell system is large in size and weight, and the heat of the fuel cell is not well utilized. At the same time, the whole system has a complicated structure and is not easy to control and carry.

For example, the patent "A Portable PEMFC Fuel Cell Power Supply System" with application number 201210020921.5 requires two fans, one to provide oxidant for the electric stack, and one to dissipate heat for the electric stack, and the heat of the electric stack cannot be utilized

Images