Real-time gas tightness detection equipment for fuel cell stack

Abstract

The invention relates to real-time gas tightness detection equipment for a fuel cell stack. The real-time gas tightness detection equipment comprises an oxidant gas feeding pipeline, an oxidant gas discharging pipeline, a reducing agent gas feeding pipeline, and a reducing agent gas discharging pipeline, and further comprises a gas supply device which is connected with the input ends of the oxidant gas feeding pipeline and the reducing agent gas feeding pipeline and is used for supplying gas to the oxidant gas feeding pipeline and the reducing agent gas feeding pipeline; a first gas feeding pressure sensor and a first fed gas flow meter are both arranged on the oxidant gas feeding pipeline; a second gas feeding pressure sensor and a second fed gas flow meter are both arranged on the reducing agent gas feeding pipeline; a first gas discharging pressure sensor and a first discharged gas flow meter are both arranged on the oxidant gas discharging pipeline; a second gas discharging pressure sensor and a second discharged gas flow meter are both arranged on the reducing agent gas discharging pipeline. Compared with the prior art, the real-time gas tightness detection equipment disclosedby the invention can maintain pressure for gas, and can also enable the gas to be in a flowing state to detect internal and external leakages of the fuel cell stack.

Description

technical field [0001] The invention relates to a detection device, in particular to a real-time detection device for the air tightness of a fuel cell stack. Background technique [0002] A fuel cell is a device that directly converts the chemical energy of an oxidizing agent and a reducing agent into electrical energy through an electrocatalytic reaction. It is an efficient, safe, clean, and flexible new power generation technology. Compared with other types of fuel cells (such as AFC, PAFC, MCFC, SOFC, etc.), proton exchange membrane fuel cells (PEMFC) have the characteristics of low operating temperature, high specific energy, long life, and wide application, and are considered to be One of the most promising solutions to problems such as energy crisis and environmental pollution. [0003] In order to ensure that the fuel and oxidant in the proton exchange membrane fuel cell can be distributed on both sides of the membrane electrode without mixing, the sealing technology...

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Problems solved by technology

[0007] The above three documents are all about feeding gas into the stack and maintaining the pressure. The airtightness of the stack is determined by the change of the pressure indication or the change of the flowmeter indication during the pressure holding period. There is no simulation of the movement state of the gas during the operation of the stack. The authenticity of the measured stack airtightness is questionable

In addition, none of the above three documents use a controller, and all of them are manually operated, which is inconvenient to detect and operate

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