Automatic preheating control system during cold start of fuel cell system

Abstract

The invention discloses an automatic preheating control system during cold start of a fuel cell system. According to the invention, the heated circulating cooling liquid is used for directly heating the interior of a fuel cell stack. The heating mode enables the interior of the whole fuel cell stack to be uniformly heated. According to the invention, a battery management system (BMS) in a power supply can be started to carry out real-time monitoring and safety protection on a battery of the power supply at the same time. In addition, under a warm weather condition, the fuel cell stack does not need to be preheated, but in case that an operator accidentally operates and mistakenly presses a preheating button, the preheating system does not switch on a heater after automatically detecting the related temperature and comparing and judging the related temperature with the related value. According to the invention, misoperation possibly caused by the tedious manual inspection and judgment under various conditions during cold start can be avoided. Therefore, the automatic preheating control system of the invention has the characteristics of quick and simple operation, stable and uniform heating, high efficiency, energy conservation, safety, reliability and the like.

Description

technical field [0001] The invention relates to the technical field of fuel cell cold start, in particular to an automatic preheating control system for a fuel cell system during cold start. Background technique [0002] With the increasing energy crisis and environmental pollution worldwide, many countries are constantly exploring and using clean energy, especially the application of clean energy in transportation fields such as automobiles is becoming more and more extensive. For this reason, electric vehicles have been vigorously promoted in recent years. However, compared with traditional fuel vehicles, electric vehicles still cannot meet the requirements of users because of their relatively short battery life and long charging time due to the limitations of their battery technology. Therefore, many countries have been stepping up the technology research and development of fuel cell vehicles in recent years. [0003] Hydrogen fuel cell is through the chemical reaction ...

AI Technical Summary

Problems solved by technology

[0005] However, in an extremely cold environment, such as minus 30 degrees Celsius or even colder, if the fuel cell system is directly cold-started, it will not only reduce the output performance and efficiency of the fuel cell stack, but also affect the performance of the fuel cell stack. service life

What's more serious is that when the fuel cell system is cold-started in such a cold environment, the water generated by the chemical reaction of hydrogen and oxygen inside the fuel cell stack will immediately freeze and block the air outlet of the cell stack. outlets and passageways, which may directly cause permanent damage to the structure of the fuel cell stack

Images