Idling system and control method thereof

A technology of idle speed and controller, which is applied in the direction of reactant parameter control, fuel cell additives, fuel cells, etc., can solve problems such as cross leakage and electrolyte membrane degradation, and achieve the effects of reducing concentration, reducing output power, and saving resources

Active Publication Date: 2019-07-12
ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in the fuel cell, cross leakage occurs due to the residue in the fuel cell system, and reverse current is generated, thereby deteriorating the electrolyte membrane.

Method used

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  • Idling system and control method thereof
  • Idling system and control method thereof

Examples

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Embodiment 1

[0035]In a fuel cell vehicle powered by a fuel cell system, the operation of the fuel cell at idle speed has always been a research hotspot, all in order to improve the utilization efficiency of the fuel cell and thus improve the work efficiency of the vehicle. There is stopping the supply of oxidant gas and fuel gas, but this will cause a phenomenon of cross-leakage, which will degrade the electrolyte membrane, and then it has been proposed to suppress the deterioration of the electrolyte membrane by supplying a low flow rate of oxidant gas, but this method is in the battery reactor stack The generated water cannot be discharged in time, it will flood the electrodes and reduce the service life of the battery. Because this embodiment provides an idling system, which can not only reduce the net output power of the stack, but also avoid the deterioration of the electrolyte membrane and catalyst, and also protect the battery. Such as figure 1 As shown, the idle system includes a...

Embodiment 2

[0048] On the basis of Embodiment 1, this embodiment provides a control method for an idle system, including the following steps:

[0049] Receive vehicle running status information;

[0050] Judging whether the running state information is an idling state; if so, controlling the system to perform an idling operation to reduce the output power of the system; if not, controlling the system to operate normally.

[0051] Specifically, when the road condition changes and the driver performs an idling operation, the controller receives an idling instruction and controls the idling system to perform a corresponding operation.

[0052] Specifically, the idling operation includes the following steps: controlling the pressure control valve 2 to reduce the pressure of the fuel in the fuel supply pipeline, controlling the flow control valve 3 to reduce the flow of fuel in the fuel supply pipeline, and at the same time reducing the pressure of the fuel in the fuel supply pipeline. The ro...

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Abstract

The invention discloses an idling system. The idling system comprises a fuel reaction stack, a fuel supply pipeline, an oxidant supply pipeline and a controller. The fuel supply pipeline is configuredto transmit fuel to the anode of the fuel reaction stack; the oxidant supply pipeline is configured to transmit an oxidizing agent to the cathode of the fuel reaction stack; the oxidant supply pipeline comprises an air compressor and an injector, the injector is configured to inject the oxidizing agent into the cathode of the fuel reaction stack; and the cathode of the fuel reaction stack is provided with a circulating pipeline, and the circulating pipeline can allow the gases discharged from the cathode to enter the inlet side of the cathode again. The present invention further provides a control method of an idling system. The output power of the fuel cell can be reduced through reduction of the concentration of the oxidizing agent, and the utilization efficiency of the fuel and the vehicle safety can be improved so as to improve the whole performances of the vehicle.

Description

technical field [0001] The invention relates to the field of fuel cell control, in particular to an idle speed system and a control method thereof. Background technique [0002] In recent years, new energy vehicles are attracting everyone's attention, and fuel cell vehicles have gradually received more and more attention. The fuel cell system includes a fuel cell stack, in which the reaction gas undergoes an electrochemical reaction to generate electric energy; and a reaction gas supply device, which supplies the fuel cell stack with the reaction gas through a reaction gas flow path. [0003] The fuel stack is a stack structure obtained by stacking hundreds of single cells, and the single cell is composed of a pair of bipolar plates sandwiching the membrane electrode MEA. The membrane electrode structure is composed of positive and negative electrodes and a polymer electrolyte membrane in the middle. [0004] When hydrogen as a fuel gas is supplied to the anode electrode o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04082H01M8/04089H01M8/04746H01M8/04858
CPCH01M8/04097H01M8/04201H01M8/04753H01M8/04761H01M8/04949Y02E60/50
Inventor 翁鹏程李健韩旭
Owner ZHEJIANG GEELY AUTOMOBILE RES INST CO LTD
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