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A fuel cell purging system and control method

A fuel cell and control method technology, applied in the direction of fuel cells, fuel cell additives, electrolyte treatment of solid electrolyte batteries, etc., can solve problems such as incomplete purging of fuel cells, and achieve the goal of preventing excessive temperature and accelerating purging Effect

Active Publication Date: 2021-11-26
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to propose a fuel cell purging system and control method, aiming at the problem of incomplete fuel cell purging

Method used

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  • A fuel cell purging system and control method
  • A fuel cell purging system and control method
  • A fuel cell purging system and control method

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Embodiment Construction

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0049] It should be noted that if there are directional indications involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture. If the specific posture changes , then the directional indication changes accordingly.

[0050] In addition, if there are descriptions involving "first", "second" and so on ...

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Abstract

The invention discloses a fuel cell purge system and a control method, the control method of the fuel cell purge includes the following steps: after the electric stack stops generating power and starts purge, obtain the purge preset parameters of the air system and the hydrogen system , and the control parameters of the thermal management system; control the speed of the air compressor, the opening of the hydrogen inlet proportional valve and the speed of the hydrogen circulation pump according to the preset parameters of the purge, and control the speed of the hydrogen circulation pump according to the control of the thermal management system Parameter control selects the connection between the heat dissipation branch and the heating branch, and controls the opening and closing of the corresponding radiator and the heater; obtains the change value of the AC impedance in the stack, and according to the current The change value of the internal resistance of the stack controls the end of the purge in the stack. By switching between the heating branch and the heat dissipation branch, the moisture in the electric stack is quickly purged.

Description

technical field [0001] The invention relates to the field of automobile fuel cells, in particular to a fuel cell purging system and a control method. Background technique [0002] A fuel cell is a chemical device that directly converts the chemical energy of fuel into electrical energy through an electrochemical reaction. The mainstream vehicle-mounted fuel cell uses a proton exchange membrane fuel cell, and its reactants are hydrogen and air, which generate heat and water while generating electricity. Due to the large amount of water produced by the reaction, it is easy to accumulate inside the stack when it is shut down, resulting in water flooding, causing the performance of the stack to decay and affecting the next normal startup. Especially in the low temperature environment, the water in the stack will freeze, which will cause physical damage to the proton exchange membrane and the stack structure. up and working. To sum up, when the fuel cell is shut down, the stac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/04029H01M8/04228H01M8/04291H01M8/04303H01M8/04492H01M8/04694H01M8/04955
CPCH01M8/04029H01M8/04291H01M8/04492H01M8/04694H01M8/04955H01M8/04228H01M8/04303Y02E60/50
Inventor 张扬乔曌王家恒陈彬彬张坤姚成鑫姚帅杰
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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