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Automatic preheating control system during cold start of fuel cell system

A technology of fuel cell system and preheating control, which is applied in the direction of battery/fuel cell control device, fuel cell heat exchange, fuel cell, etc. Problems such as damage to the battery stack structure, etc., to achieve the effect of strong practicability, stable and uniform heating, and simple operation

Pending Publication Date: 2021-07-27
张智好
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Automatic preheating control system during cold start of fuel cell system
  • Automatic preheating control system during cold start of fuel cell system
  • Automatic preheating control system during cold start of fuel cell system

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Embodiment Construction

[0031] In order to solve the technical problem that the low temperature has adverse effects on the performance and life of the fuel cell stack when the fuel cell is cold-started under extremely cold conditions, usually, many fuel cell manufacturers directly add external heating to the outside of the fuel cell stack. When it needs to be warmed up, turn on the heater to heat the fuel cell stack. Since this external heater is heated from the outside of the fuel cell stack, it takes time for the heat to transfer from the outside to the inside of the fuel cell stack, and the heating to the inside of the fuel cell stack is uneven. Thereby it has disadvantages such as lower efficiency, longer heating time, and difficulty in accurately controlling the heating temperature.

[0032] For fuel cell systems with large capacity, liquid cooling is generally used, and the basic structure of the liquid cooling system is as follows: figure 1 As shown, it is composed of the liquid cooling circu...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04223H01M8/04225H01M8/04007H01M8/04029H01M8/04302B60L58/31B60L58/34
CPCB60L58/31B60L58/34H01M8/04029H01M8/04037H01M8/04268H01M2250/20H01M8/04225H01M8/04302Y02E60/50Y02T90/40
Inventor 张智好
Owner 张智好
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