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A fuel cell and its control method

A fuel cell and cell stack technology, which is applied to fuel cells, fuel cell additives, reactant parameter control, etc., can solve the problems of reduced service life, fuel cell performance degradation, and fast corrosion rate of carbon carriers, and achieves extended service life. , The effect of reducing oxygen content and improving safety

Active Publication Date: 2022-04-19
FUJIAN YANAN ELECTRIC MACHINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of starting and stopping the fuel cell, the fuel cell is generally in an open circuit state, and the corrosion rate of the carbon carrier is relatively fast, and the hydrogen-air interface is prone to appear during the starting and stopping process. The speed increases sharply, which will cause the fuel cell performance to decline and the service life to be reduced

Method used

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  • A fuel cell and its control method
  • A fuel cell and its control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] refer to figure 1 , a fuel cell, comprising a casing 1, a cell stack 2, an intake control mechanism 3, an exhaust control mechanism 4, and an air bag 5 wound outside the cell stack 2; the cell stack 2 is installed in the casing 1; the battery The first side 21 of the stack 2 has an air inlet 22 and an air outlet 23; the air outlet 23 communicates with the air inlet 51 of the airbag 5 and the air inlet of the exhaust control mechanism 4 respectively, so that the exhaust control mechanism 4 can control the battery stack. The exhaust pressure of 2; the air intake control mechanism 3 communicates with the air inlet 22 and the air outlet 52 of the air bag 5 respectively, so that the air intake control mechanism 3 can control the opening and closing of the air bag 5 air outlet 52 and the air intake of the air inlet 22. Preferably, the exhaust control mechanism 4 is a back pressure valve.

[0058] refer to figure 1 , the air outlet 23 communicates with the air inlet 51 of th...

Embodiment 2

[0065] refer to figure 2 , on the basis of Embodiment 1, a deoxygenation device 8 is also provided, and the deoxygenation device 8 is installed at the air inlet 51 of the air bag 5 and communicated with the air bag 5 for reducing the oxygen content of the waste gas entering the air bag 5 , so that nitrogen occupies the main volume of the exhaust gas, and the exhaust gas with lower oxygen content is used to clean the battery stack 2 , which can speed up the voltage drop of the battery stack 2 .

Embodiment 3

[0067] In order to prevent the fuel cell from being at a high potential or reduce the time that the fuel cell is at a high potential, in this application, the voltage of the cell stack 2 of the fuel cell is lowered to reduce the corrosion of the carbon carrier of the fuel cell and prolong the life of the fuel cell.

[0068] A control method for a fuel cell, comprising the following steps:

[0069] S1: When the battery stack 2 starts to work, the air intake control mechanism 3 controls the air outlet 52 of the airbag 5 to close, and air enters the battery stack 2 from the air inlet 22; the exhaust control mechanism 4 adjusts the air in the fuel cell by controlling the opening Air pressure to control the intake air volume of the airbag 5 and the exhaust volume of the battery stack 2; specifically, the opening and closing degree of the exhaust control mechanism 4 is 0% to 50%, and the first electric valve 31 controls the air outlet 52 of the airbag 5 to close and enter The air in...

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Abstract

The invention discloses a fuel cell and a control method thereof, comprising a casing, a battery stack, an air intake control mechanism, an exhaust control mechanism, and an air bag wound outside the battery stack; the battery stack is installed on the In the casing; the first side of the battery stack has an air inlet and an air outlet; the air outlet communicates with the air inlet of the air bag and the air inlet of the exhaust control mechanism respectively, so that the exhaust control The mechanism can control the exhaust pressure of the battery stack; the air intake control mechanism is respectively communicated with the air inlet and the air outlet of the airbag, so that the air intake control mechanism can control the opening and closing of the air outlet of the airbag and the intake air volume of the air inlet. In the present invention, the air bag is inflated by collecting the waste gas generated after the battery stack burns, so as to realize the anti-collision effect of the battery stack and improve safety, and the reverse air supply to the battery stack can be realized through the waste gas in the air bag, so as to extend the The purpose of battery stack life.

Description

technical field [0001] The invention relates to the battery field, in particular to a fuel cell and a control method thereof. Background technique [0002] A fuel cell is a device that converts chemical energy stored in fuel and oxidant into electrical energy. Due to the advantages of low noise, high efficiency, no pollution, easy modularization, and compact structure, fuel cells are widely used in fuel cell vehicles. Fuel cell vehicles are regarded as future energy alternatives, energy-saving and emission-reducing means of transportation, and become an important vehicle in the 21st century. One of the new energy vehicles in the market prospect. Vehicle working conditions require fuel cells to be applicable to complex road conditions, and to be able to resist the vibration and swing of the fuel cell stack caused by bumpy working conditions. However, the existing fuel cells play the role of preventing battery shocks only by covering the casing outside the battery stack, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04082H01M8/04089H01M8/04302H01M8/04303H01M8/04746H01M8/04791H01M8/04955H01M8/0662F16F15/04
CPCH01M8/04302H01M8/04303H01M8/04746H01M8/04761H01M8/04776H01M8/04955H01M8/04805H01M8/04201H01M8/04104H01M8/0662F16F15/04Y02E60/50
Inventor 谢义淳郭玮翔郑丽萍刘力铭刘静林玉祥
Owner FUJIAN YANAN ELECTRIC MACHINE