Fuel cell air humidity adjusting system and control method thereof

An air humidity and fuel cell technology, applied in fuel cells, electrical components, circuits, etc., can solve the problems of narrow humidity adjustment range and poor humidity control accuracy, and achieve the goals of avoiding surge, precise and fast control, and improving response rate Effect

Active Publication Date: 2021-07-02
DONGFENG MOTOR GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology has the problems of narrow humidity adjustment range and poor humidity control accuracy under dynamic working conditions.

Method used

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  • Fuel cell air humidity adjusting system and control method thereof
  • Fuel cell air humidity adjusting system and control method thereof

Examples

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Embodiment Construction

[0034] The following specific examples illustrate the present invention in further detail.

[0035] Such as figure 1 As shown, a fuel cell air humidity conditioning system provided by the present invention includes a stack 100, a controller 200, an air filter 1, a flow meter 2, an air compressor 3, an intercooler 4, a humidifier 5, a mixed row Air filter 6, air filter 1, flow meter 2, air compressor 3, intercooler 4, humidifier 5, the dry air side is sequentially connected to the cathode inlet of the stack 100 along the air intake direction, and the cathode outlet of the stack 100 is along the exhaust The direction connects the wet air side of the humidifier 5 and the mixer 6 in turn. A pressure relief valve 7 for adjusting the inlet pressure of the cathode of the stack 100 is arranged between the intercooler 4 and the mixer 6. The cathode outlet of the stack 100 is connected to the mixer. A back pressure valve 8 for adjusting the outlet pressure of the cathode of the electri...

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PUM

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Abstract

The invention discloses a fuel cell air humidity adjusting system and a control method thereof, and the control method comprises the steps: collecting the operation data of an electric pile cathode, obtaining the actual air humidity RH at an inlet, processing the operation data to obtain the target air humidity RH0 at the inlet under the current working condition, and calculating the difference value delta(RH) when RH is greater than RH0, and adjusting the air humidity of the cathode inlet of the electric pile through combined control according to the delta RH; the combined control comprises the steps of controlling a pressure release valve capable of bypassing the fresh air part entering the humidifier to the mixed discharge device, controlling an inlet humidity regulating valve capable of bypassing the fresh air part entering the humidifier to the cathode inlet of the electric pile, controlling an outlet humidity regulating valve capable of bypassing the waste air entering the humidifier to the mixed discharge device, and controlling an air compressor. Through combined adjustment of the inlet humidity adjusting valve, the outlet humidity adjusting valve, the air compressor and the back pressure valve, the air humidity of an electric pile inlet is accurately controlled, and meanwhile the electric pile humidity response rate under the dynamic working condition is increased.

Description

technical field [0001] The invention relates to a fuel cell, in particular to a fuel cell air humidity adjustment system and a control method thereof. Background technique [0002] The fuel cell system includes electric stack, air system, hydrogen system, cooling system and corresponding control system. Among them, the air system is composed of air filter, air compressor, intercooler, humidifier and back pressure valve. Different, the demand for parameters such as the flow rate, temperature, pressure and humidity of the air supplied by the air system will also change accordingly. The air compressor is generally a centrifugal type, and its function is to provide air flow for the stack. The back pressure valve combined with the speed adjustment of the air compressor can control the air pressure entering the stack. A pressure relief valve bypasses excess air to avoid compressor surge. The humidifier can effectively use the high-humidity exhaust gas discharged from the stack ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/04119H01M8/0432H01M8/0438H01M8/04492H01M8/04828
CPCH01M8/04126H01M8/04141H01M8/04507H01M8/04335H01M8/04395H01M8/04835Y02E60/50
Inventor 马义张剑李波尚伟华张明凯
Owner DONGFENG MOTOR GRP
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