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A method for fast and low temperature start-up of a fuel cell system

A fuel cell system and fuel cell technology, applied to fuel cells, circuits, electrical components, etc., can solve problems such as shortening the life of fuel cells, inability to reach reactive gases, and low-temperature start-up failures, so as to achieve rapid low-temperature start-up and shorten low-temperature start-up Time, effect of fast low temperature start

Active Publication Date: 2022-06-21
SHANGHAI SHENLI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the inside of the fuel cell is completely blocked by icing, if the temperature of the fuel cell does not rise above zero, the icing will cause the catalytic layer to be blocked, the reaction gas cannot reach the surface of the catalyst, and the reaction cannot proceed. The fuel cell stack stops discharging and starts at low temperature. fail
At the same time, internal icing will damage the key materials of fuel cell materials, resulting in reduced performance and shortened fuel cell life

Method used

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  • A method for fast and low temperature start-up of a fuel cell system
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  • A method for fast and low temperature start-up of a fuel cell system

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Embodiment

[0040] like figure 1 As shown, the present invention provides a method for rapidly starting a fuel cell system at a low temperature. When it is detected that the external temperature is lower than zero degrees Celsius, the method of the present invention can quickly start the fuel cell system, including the following steps:

[0041] S1) Open the hydrogen subsystem, and feed hydrogen into the fuel cell stack 7;

[0042] S2) start the DCDC controller 17, and set the current value of the fuel cell stack to the first start-up current;

[0043] S3) Open the air subsystem, and feed air into the fuel cell stack 7;

[0044] S4) the fuel cell starts to generate electricity, and the output current increases to the first starting current;

[0045] S5) Continue to load until the fuel cell reaches 50% of the rated output power, and complete the rapid low-temperature start-up.

[0046] like figure 2 As shown, the device used in the low temperature starting method of the fuel cell syste...

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Abstract

The invention relates to a fast low-temperature start-up method for a fuel cell system, which is used to quickly start the fuel cell system when the external temperature is detected to be lower than zero degrees Celsius, comprising the following steps: S1) Open the hydrogen subsystem and feed the fuel cell stack Hydrogen; S2) Start the DCDC controller, and set the first starting current; S3) Open the air subsystem, and feed air into the fuel cell stack; S4) The fuel cell starts to generate electricity, and the output current increases to the first starting current; S5) Continue to load until the fuel cell reaches 50% of the rated output power, and complete fast low-temperature start-up. Compared with the prior art, the present invention has the advantages of simple operation and shortened low-temperature start-up time of the fuel cell system.

Description

technical field [0001] The present invention relates to the technical field of fuel cell systems, in particular to a method for fast and low temperature start-up of a fuel cell system. Background technique [0002] A proton exchange membrane fuel cell (PEMFC), also known as a polyelectrolyte fuel cell (PEFC), is a device that directly converts the chemical energy of a reducing agent and an oxidizing agent into electrical energy. When a fuel cell is in use, it usually needs a set of corresponding auxiliary systems, mainly including hydrogen subsystem, air subsystem, cooling system, power output system and voltage detection system and other accessory systems, which constitute the fuel cell engine system as a whole. Among them, the hydrogen subsystem provides hydrogen for the fuel cell stack, and adjusts the pressure and flow of hydrogen entering the stack according to the operating conditions; the air subsystem provides an appropriate amount of oxidant (air or oxygen) for the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04225H01M8/04302H01M8/04858
CPCH01M8/04225H01M8/04302H01M8/0491Y02E60/50
Inventor 徐鑫甘全全
Owner SHANGHAI SHENLI TECH CO LTD
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