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Method for rapidly activating proton exchange membrane fuel cell

A proton exchange membrane and fuel cell technology, applied in fuel cells, circuits, electrical components, etc., can solve the problems of huge time and hydrogen cost, complex activation operation process, inconvenient automatic operation, etc., to improve energy utilization and efficiency , increased operability and convenience

Inactive Publication Date: 2020-08-28
北京中氢绿能科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The methods in these patents generally involve the following two disadvantages: First, the time required for the entire activation process is relatively long, generally several to ten hours, and huge time and hydrogen costs will be generated during mass production of stacks ; Second, the process of activation operation is relatively complicated, which is not easy to be automated and operated independently by customers

Method used

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  • Method for rapidly activating proton exchange membrane fuel cell
  • Method for rapidly activating proton exchange membrane fuel cell
  • Method for rapidly activating proton exchange membrane fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] see figure 1 , a method for rapidly activating a proton exchange membrane fuel cell, comprising the steps of:

[0026] Step 1. Let the proton exchange membrane fuel cell stack be in the load state of 5% of the rated power, and then open the fuel inlet and outlet valves;

[0027] Step 2. After waiting for 3s, feed the oxidant and run for 3s;

[0028] Step 3: Load gradually to 5% of the rated power according to the step size of 5% of the rated power, and the interval between each step is 3s;

[0029] Step 4. Take measures to reduce the potential of the single cathode side of the fuel cell stack to below 0.1V and maintain it for 0.05s;

[0030] Step 5, restore the fuel cell stack to 95% of the rated operating point power, and run for 5s;

[0031] Step 6, repeat steps 4 and 5 for the number of operations ≥ 1.

[0032] In step 4, the methods adopted include short circuit, stopping the supply of oxidant, feeding nitrogen gas, and forced discharge with power supply when sh...

Embodiment 2

[0034] see figure 2 , a method for rapidly activating a proton exchange membrane fuel cell, comprising the steps of:

[0035] Step 1. Let the proton exchange membrane fuel cell stack be in the load state of 30% of the rated power, and then open the fuel inlet and outlet valves;

[0036] Step 2. After waiting for 10s, feed the oxidant and run for 60s;

[0037] Step 3: Step by step from 30% of rated power to 90% of rated power, the interval between each step is 60s;

[0038] Step 4, take measures to reduce the potential of the single cathode side of the fuel cell stack to below 0.1V, and maintain it for 60s;

[0039] Step 5, restore the fuel cell stack to 120% of the rated operating point power, and run for 60s;

[0040] Step 6, repeat steps 4 and 5 for the number of operations ≥ 1.

[0041] In step 4, the methods adopted include short circuit, stopping the supply of oxidant, feeding nitrogen gas, and forced discharge with power supply when shutting down.

Embodiment 3

[0043] see image 3 , a method for rapidly activating a proton exchange membrane fuel cell, comprising the steps of:

[0044] Step 1. Let the proton exchange membrane fuel cell stack be in the load state of 10% of the rated power, and then open the fuel inlet and outlet valves;

[0045] Step 2. After waiting for 5s, feed the oxidant and run for 20s;

[0046] Step 3: Step by step from 10% of rated power to 30% of rated power, the interval between each step is 20s;

[0047] Step 4. Take measures to reduce the potential of the single cathode side of the fuel cell stack to below 0.1V and maintain it for 15s;

[0048] Step 5, restore the fuel cell stack to 100% of the rated operating point power, and run for 20s;

[0049] Step 6, repeat steps 4 and 5 for the number of operations ≥ 1.

[0050] In step 4, the methods adopted include short circuit, stopping the supply of oxidant, feeding nitrogen gas, and forced discharge with power supply when shutting down.

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Abstract

The invention relates to a method for rapidly activating a proton exchange membrane fuel cell. The method comprises the following steps: 1, enabling a proton exchange membrane fuel cell stack to be inan on-load state with rated power of 5%-30%, and then opening an inlet and outlet valve of fuel; 2, waiting for 3-10 s, introducing an oxidizing agent, and operating for 3-60 s; 3, gradually loadingto 5%-90% of the rated power according to the step length of 5%-30% of the rated power, wherein the interval between every two step lengths is 3-60 s; 4, reducing the electric potential of the singlecathode side of the fuel cell stack to be below 0.1 V by adopting a mode, and maintaining the potential for 0.05-60 s; and 5, recovering the power of the fuel cell stack to 95-120% of the rated working point power, and operating for 5-60 s. According to the invention, a universal fundamental activation and recovery method is provided for the nature of performance degradation of the proton exchangemembrane fuel cell, that is, the electric potential of the cathode side of the fuel cell is reduced, so that the cathode electric potential of the fuel cell can be reduced in many ways, and the selectivity, the operability and the convenience are greatly improved.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a method for rapidly activating a proton exchange membrane fuel cell. Background technique [0002] As a clean and environmentally friendly electrochemical device with high energy density, fuel cells are an important part of realizing the hydrogen economy. In recent years, as energy issues and environmental protection issues have become increasingly prominent, fuel cells, as a possible solution, have become an upsurge of research all over the world. Western developed countries have achieved many breakthroughs in the field of fuel cell technology, and have gradually moved towards the road of commercialization. At present, no matter the government, universities or enterprises in our country have shown unprecedented enthusiasm for fuel cells, and strive to solve the problems brought about by the current energy structure. At present, in the research and commercialization of fuel...

Claims

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Application Information

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IPC IPC(8): H01M8/04223H01M8/04225H01M8/04302
CPCH01M8/04223H01M8/04225H01M8/04302Y02E60/50
Inventor 李根
Owner 北京中氢绿能科技有限公司
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