Method for enhancing running durability of fuel cell

A fuel cell, fuel cell stack technology

Inactive Publication Date: 2011-01-26
SHANGHAI PEARL HYDROGEN POWER SOURCE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] At present, there are still some problems in the fuel cell as follows: 1. After the fuel cell is turned off, it is stored statically. After a long period of non-working state, the fuel cell is started, and the performance of the fuel cell is obviously reduced. It is difficult to achieve the performance of the fuel cell when it was shut down last time. , seriously affecting the life of the fuel cell
[0009] It is generally believed that the main reason for the above-mentioned impac

Method used

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  • Method for enhancing running durability of fuel cell

Examples

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Embodiment 1

[0032] Such as figure 1 Shown is a schematic diagram of the system structure of a 200W air-cooled fuel cell, the air-cooled fuel cell stack 4 is provided with a cooling fan 3, the hydrogen inlet of the air-cooled fuel cell stack 4 is provided with a solenoid valve 1, and the hydrogen outlet is provided with a solenoid valve 2 , the voltage output end of the air-cooled fuel cell stack 4 is provided with a controllable switch 5, and the operating life of the fuel cell is improved by setting the shutdown procedure of the fuel cell, mainly by increasing the temperature of the fuel cell after shutdown, and by setting the controllable switch 5 so that The fuel cell is kept at zero voltage, and the treatment method is under the condition that the cathode is short of oxygen.

[0033] The shutdown procedure specifically includes the following process: when the fuel cell needs to be shut down after running for a period of time, the cooling fan 3 stops running. At this time, the hydrogen...

Embodiment 2

[0040] A method for improving the operating durability of a fuel cell, the method is to improve the operating life of the fuel cell by setting a shutdown program for the fuel cell, and the shutdown program specifically includes the following steps:

[0041] (1) Keep the hydrogen supply on the anode side of the fuel cell so that the fuel hydrogen is in a sufficient state;

[0042] (2) Turn off the air supply fan on the cathode side of the fuel cell;

[0043] (3) A controllable switch is connected to the output end of the fuel cell, so that the fuel cell has sufficient hydrogen on the anode side and insufficient oxygen supply on the cathode side, the controllable switch is turned off, so that the positive and negative poles of the voltage output end of the fuel cell are connected, and the fuel The battery is short-circuited; the cathode side of the fuel cell is relatively open, and the air flow path on the cathode side is relatively short. In the absence of a fan for forced air ...

Embodiment 3

[0046] A method for improving the operating durability of a fuel cell, the method is to improve the operating life of the fuel cell by setting a shutdown program for the fuel cell, and the shutdown program specifically includes the following steps:

[0047] (1) Keep the hydrogen supply on the anode side of the fuel cell so that the fuel hydrogen is in a sufficient state;

[0048] (2) Turn off the air supply fan on the cathode side of the fuel cell;

[0049] (3) A controllable switch is connected to the output end of the fuel cell, so that the fuel cell has sufficient hydrogen on the anode side and insufficient oxygen supply on the cathode side, the controllable switch is turned off, so that the positive and negative poles of the voltage output end of the fuel cell are connected, and the fuel The battery is short-circuited; the cathode side of the fuel cell is relatively open, and the air flow path on the cathode side is relatively short. In the absence of a fan for forced air ...

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Abstract

The invention relates to a method for enhancing the running durability of a fuel cell. In the method, the service life of the fuel cell is prolonged by setting the shutdown program of the fuel cell. The shutdown program comprises the following specific steps of: (1) keeping hydrogen supply to the anode side of the fuel cell so as to keep fuel hydrogen sufficient; (2) shutting down an air supply fan on the cathode side of the fuel cell; (3) connecting a controllable switch to the output end of the fuel cell, switching off the controllable switch to short-circuit the fuel cell and rising the temperature of the fuel cell to the set temperature in a short-circuited state; and (4) draining water accumulated in a fuel cell stack, stopping the hydrogen supply and lowering the temperature of the fuel cell under the natural condition or forced air convection condition. Compared with the prior art, the method has the advantages of simpleness, good effect and the like.

Description

technical field [0001] The present invention relates to a fuel cell, in particular to a method for improving the running durability of the fuel cell. Background technique [0002] Compared with traditional energy storage batteries, fuel cells have many advantages such as environmental protection, no pollution, no noise, light weight, easy maintenance, recyclable materials, no short-board effect of battery charge and discharge, and no battery discharge when the battery is not working. much attention. [0003] Fuel cells must solve several key problems in the process of industrialization, one is the life of the fuel cell, and the other is the cost of the fuel cell. With regard to the cost of fuel cells, through the extensive work of many scientific researchers, the current price has dropped significantly, and has already competed with traditional energy storage batteries in some industries. Regarding the service life of fuel cells, many scientific researchers have done a lot...

Claims

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Application Information

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IPC IPC(8): H01M8/04H01M8/04089
CPCY02E60/50
Inventor 田丙伦
Owner SHANGHAI PEARL HYDROGEN POWER SOURCE TECH
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