Overpressure protection device for fuel cell and control method

An overvoltage protection device and fuel cell technology, which is applied in fuel cells, circuits, electrical components, etc., can solve problems such as the inability to meet the coupling of cathode and anode pressure differences, achieve balance between cathode and anode pressure differences, and improve safety and stability , to achieve the effect of overvoltage protection

Pending Publication Date: 2019-10-22
SHANGHAI ELECTRICGROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defect that the overvoltage protection mode of the fuel cell in the prior art can only realize the ultra-high pressure protection on one side of the anode, and cannot meet the requirements of the pressure difference coupling between the cathode and the anode, and provide a fuel cell Battery overvoltage protection device and control method

Method used

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  • Overpressure protection device for fuel cell and control method
  • Overpressure protection device for fuel cell and control method
  • Overpressure protection device for fuel cell and control method

Examples

Experimental program
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Effect test

Embodiment 1

[0065] like figure 1 As shown, the fuel cell overvoltage protection device of this embodiment includes a normally open first solenoid valve 1 , a first pressure detection module 2 and a control module 3 .

[0066] Both the first electromagnetic valve 1 and the first pressure detection module 2 are arranged on the anode main circuit of the fuel cell;

[0067] The control module 3 is electrically connected with the first solenoid valve 1 and the first pressure detection module 2 respectively.

[0068] Wherein, when the fuel cell is in normal operation, the first solenoid valve is in a closed state;

[0069] The first pressure detection module 2 is used to detect the first pressure value of the anode side of the fuel cell and send it to the control module 3;

[0070] The control module 3 is used to judge whether the first pressure value satisfies the first setting range, and if so, controls the first electromagnetic valve 1 to open intermittently or keep it open; if it exceeds ...

Embodiment 2

[0077] like figure 2 As shown, the fuel cell overvoltage protection device of this embodiment is a further improvement on Embodiment 1, specifically:

[0078] The overvoltage protection device also includes an anode intake control valve 4 and an anode exhaust control valve 5 .

[0079] Among them, the anode intake control valve and the anode exhaust control valve are normally closed electronic control valves;

[0080] The anode intake control valve 4 is set on the inlet branch of the anode main pipeline P1 of the fuel cell stack A, and the anode exhaust control valve 5 is set on the outlet branch of the anode main pipeline P1 of the fuel cell A.

[0081] When the fuel cell stack A is in normal operation, the anode intake control valve 4 is opened, and the anode exhaust control valve 5 is intermittently opened.

[0082] When the first pressure value satisfies the first setting range, the control module 3 is used to control the anode tailing control valve 5 to keep open or op...

Embodiment 3

[0107] The control method for the overvoltage protection of the fuel cell in this embodiment is realized by using the overvoltage protection device for the fuel cell in any one of the embodiments 1 or 2.

[0108] like image 3 As shown, the control method for the overvoltage protection of the fuel cell in this embodiment includes:

[0109] S101. Use the first pressure detection module to detect the first pressure value on the anode side of the fuel cell, and send it to the control module;

[0110] S102. Use the control module to judge whether the first pressure value satisfies the first setting range, and if so, control the first electromagnetic valve to open intermittently or keep it open; if it exceeds the first setting range, control the fuel cell to power off and shut down;

[0111] Wherein, when the fuel cell is powered off and shut down, the first electromagnetic valve is in an open state.

[0112] The control module controls the intermittent opening of the first elect...

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Abstract

The invention discloses an overpressure protection device for a fuel cell and a control method. The overpressure protection device comprises a normally open first electromagnetic valve, a pressure relief valve, a first pressure detecting module and a control module, wherein the first pressure detecting module is used for detecting a first pressure value of an anode side of the fuel cell and sending the first pressure value to the control module; the control module is used for judging whether the first pressure value meets a first set range, and if yes, the first solenoid valve is controlled tobe intermittently opened or kept to be in an open state; and if the first pressure value exceeds the first set range, the fuel cell is controlled to be power-off and stopped, and the pressure reliefvalve is controlled to be open. Multi-stage control on the high pressure at the anode side of the fuel cell can be realized, thereby flexibly and effectively realizing overpressure protection on the anode side of the fuel cell; and besides, the requirement of the balance of the anode and cathode pressure difference of the fuel cell is satisfied, and the fuel cell work safety and the stability arefurther improved.

Description

technical field [0001] The invention relates to the technical field of battery protection, in particular to an overvoltage protection device and a control method for a fuel cell. Background technique [0002] For fuel cells, such as proton exchange membrane fuel cells, the chemical energy in the fuel (usually hydrogen or methanol) is directly converted into electrical energy through an electrochemical reaction, which has the significant advantages of high energy conversion efficiency and no pollutant emissions. Specifically, the fuel gas and the oxidizing gas are fed into the anode and cathode of the fuel cell membrane electrode respectively, and the fuel gas separates electrons and ions on the anode, and the electrons are conducted to the cathode through an external circuit to form a circuit to generate current; the ions react in the electric field Under this condition, the electrolyte migrates to the cathode, and the electrons and ions react with the oxidizing gas on the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04746H01M8/04955
CPCH01M8/04753H01M8/04776H01M8/04783H01M8/04955Y02E60/50
Inventor 林业发吴炎花王志斌
Owner SHANGHAI ELECTRICGROUP CORP
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