Variable-throat ejector used for fuel cell system

A fuel cell system and ejector technology, which is applied in the field of ejectors, can solve the problems of no ejection effect, ejector ejection performance degradation, etc., and achieve the effect of increasing the circulation volume

Pending Publication Date: 2018-08-14
安徽明天氢能科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the stack is output at low power or the amount of hydrogen required for the reaction is small, the flow of hydrogen gas from the hydrogen stora...

Method used

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  • Variable-throat ejector used for fuel cell system
  • Variable-throat ejector used for fuel cell system
  • Variable-throat ejector used for fuel cell system

Examples

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Embodiment Construction

[0032] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention. Without departing from the spirit and essence of the present invention, any modifications or replacements made to the methods, steps or conditions of the present invention belong to the protection scope of the present invention.

[0033] Hereinafter, specific implementations of a variable throat ejector for a vehicle fuel cell will be described with reference to the accompanying drawings.

[0034] figure 1 It is the schematic diagram of the hydrogen circulation system of the vehicle fuel cell.

[0035] refer to figure 1 The hydrogen circulation system diagram of the vehicle fuel cell includes: a hydrogen storage bottle (210), which provides the hydrogen required for the reaction of the fuel cell stack; a pressure reducing valve (220), which reduces the pressure of the high-pressure hydrogen flowing out of the hydrogen storage bottle to...

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Abstract

The invention discloses a variable-throat ejector used for a fuel cell system. The ejector comprises an ejector main body, a nozzle and an electromagnetic valve, wherein a recycling hydrogen inlet anda hydrogen outlet are formed in the inner side of the ejector main body; the nozzle has a high-pressure hydrogen inlet and a gradually shrunk and gradually expanded nozzle for allowing high-pressurehydrogen to flow into the ejector main body; and the electromagnetic valve has a probe for adjusting the cross sectional area size of the nozzle throat and a valve body for controlling the probe to move. By virtue of the variable-throat ejector used for the fuel cell system provided by the invention, the cross sectional area of the throat can be changed according to electric pile power and hydrogen amount needed by the electric pile; the ejector can control the position of the probe through the electromagnetic valve in the working process so as to control the flow of recycling gas in the hydrogen cycle loop; and more specifically, the working performance of the ejector can be controlled automatically, so that the cycle amount of the recycling gas is increased by reducing the cross sectional area of the throat in a small-power working condition of the electric pile.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and relates to a vehicle fuel cell power system, in particular to an ejector for a hydrogen circulation system of a vehicle fuel cell system. Background technique [0002] Fuel cell vehicle is a kind of new energy vehicle, which has the advantages of cleanness, environmental protection, high energy efficiency, stable operation, and no noise. Currently, there are more and more researches on fuel cell vehicles. For proton exchange membrane fuel cells, hydrogen and oxygen convert chemical energy into electricity through redox reactions to drive cars. The final product of hydrogen and oxygen is water, which has no pollution to the environment. [0003] Vehicle fuel cell systems generally consist of four parts: air supply system, hydrogen supply system, water and heat management system, and system control. Among them, the hydrogen supply system has two methods: anode closed end and hydrogen circu...

Claims

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Application Information

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IPC IPC(8): H01M8/04089H01M8/0438H01M8/2457
CPCH01M8/04097H01M8/04388H01M8/2457H01M2250/20Y02E60/50
Inventor 邢春美王朝云潘永志殷园张永兵夏飞
Owner 安徽明天氢能科技股份有限公司
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