Fuel cell system using hydrogen supply manifold

Abstract

A fuel cell system having a hydrogen supply manifold according to an exemplary embodiment of the present invention may include a stack that uses air and fuel gas, which is supplied, to generated electricity, a recirculation line that recirculates a fuel gas, which is partially used by the stack to be exhausted, to an inlet of the stack, and an ejector unit that is disposed on the recirculation line, supplies fresh fuel gas, and circulates the recirculated gas, wherein the ejector unit may include a middle pressure manifold where a nozzle mounting portion is formed at one side and a supply passage is formed to transmit fuel gas to the nozzle mounting portion, a control valve that is disposed on the middle pressure manifold to control fuel that is supplied to the stack, a nozzle that is engaged with an end portion of the nozzle mounting portion to injects fuel gas that is supplied through the supply passage, and a low pressure manifold that is engaged with the middle pressure manifold, a chamber is formed to house the nozzle mounting portion and the nozzle, a venture and a diffuser is formed in a direction that the fuel gas is injected from the nozzle, sucks exhaust gas of the stack and mixes the exhaust gas and the fuel that is injected from the nozzle through the venture and the diffuser.

Description

technical field [0001] The present invention relates to a fuel cell system having a hydrogen supply manifold capable of safely supplying fuel gas and moisture to a cell stack that utilizes the fuel gas and moisture to generate electricity, wherein hydrogen is depressurized to recirculate it, A compact packaging of the recycling structure is thereby achieved. Background technique [0002] As known in the art, a fuel cell vehicle having a fuel cell system supplies hydrogen as fuel to a fuel cell stack to generate electricity, and the electricity generated by the fuel cell stack operates an electric motor to move the vehicle. [0003] In this paper, the fuel cell system does not convert the chemical energy of the fuel into combustion heat, but acts as a power generation system that converts the chemical energy of the fuel into electrical energy through electrochemical methods. [0004] The fuel cell system supplies high-purity hydrogen from a hydrogen storage tank to the fuel ...

AI Technical Summary

Problems solved by technology

[0009] However, the more parts are connected, the greater the possibility of hydrogen leakage, and in order to maintain airtightness, O-rings and sealing parts are required, thus increasing costs and reducing productivity

[0010] Additionally, hermetic testing time and cost increase due to the additional points at which leaks need to be measured after manufacture and repair of the system

In addition, when fittings and pipes are used to form the gas supply line, connecting parts are added, making it difficult to assemble them using automatic equipment and to manage assembly torque

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