CN203178047U

CN203178047U - Rapid air tightness detection device for fuel cell stack

Info

Publication number: CN203178047U
Application number: CN 201320046856
Authority: CN
Inventors: 顾荣鑫; 陶少龙; 张超; 张诗伟; 陈凌云; 赵伟; 徐麟
Original assignee: Kunshan FUersai Energy Co Ltd
Current assignee: Kunshan FUersai Energy Co Ltd
Priority date: 2013-01-29
Filing date: 2013-01-29
Publication date: 2013-09-04
Anticipated expiration: 2023-01-29

Abstract

The utility model discloses a rapid air tightness detection device for a fuel cell stack. The detection device comprises an electric pile and a water tank. The electric pile is disposed in a groove of a fixture in the water tank, and a surface of the electric pile providing with a gas inlet and outlet contacts with a surface of a bottom of the groove, and a position of the gas inlet and outlet is sealed by using a silica gel gasket. The fixture is provided with two rotatable clamp plates. The clamp plates respectively hold down plates on two ends of the electric pile and then closely connect the plates with a fixture main body. The fixture is provided with three gas pipelines, and gas passes through the gas pipelines and enters inside of the electric pile through the fixture. The detection device is simple and convenient in installation and dismounting. The detection device can detect internal gas leakage condition of the fuel cell stack, and can also detect external gas leakage condition.

Description

The quick air tightness detection equipment of a kind of fuel cell pile

Technical field

The utility model relates to a kind of device of quick impermeability detection of proton exchange film fuel cell electric piling, both can detect the internal gas leakage situation of fuel cell pile, can detect the extraneous gas leakage situation again.

Background technology

Fuel cell is by electrocatalytic reaction the chemical energy of Oxidizing and Reducing Agents to be directly changed into the device of electric energy, is a kind of efficient, safety, cleaning, new-generation technology flexibly.Proton Exchange Membrane Fuel Cells wherein is because it has the efficient height, energy density is big, temperature of reaction is low, noiselessness, remarkable advantage such as pollution-free are with a wide range of applications at aspects such as terrestrial power generation station, electric motor car and compact powers.Fuel battery inside mainly is made up of PEM, electro chemical catalyst, diffusion layer and bipolar plates.When operation of fuel cells, it is inner, and following course of reaction takes place: reacting gas spreads in diffusion layer, when reacting gas arrives Catalytic Layer, is adsorbed by catalyzer in Catalytic Layer and electrocatalytic reaction takes place; The proton that anode reaction generates is by being delivered to cathode side in the PEM, electronics arrives negative electrode through external circuit, with oxygen molecule reaction bonded Cheng Shui, emits heat simultaneously.Electrode reaction is:

Anode (negative pole): H2 → 2H++2e

Negative electrode (positive pole): 1/2O2+2H++2e → H2O

Cell reaction: H2+1/2O2 → H2O

In the typical Proton Exchange Membrane Fuel Cells, membrane electrode is placed in the middle of the guide plate of two conductions, and two fair water fins are respectively the fair water fin of anode fuel and the fair water fin of cathode oxidant.A fuel cell of Xing Chenging is called monocell like this, in order to increase the general power of whole Proton Exchange Membrane Fuel Cells, a plurality of monocells need be connected into electric battery by straight folded mode, is fuel cell pile again.In fuel cell pile, can there be diversion trench on the two sides of a pole plate, and wherein one side can be used as the anode guide face of a membrane electrode, and another side can be used as the cathode diversion face of another adjacent membranes electrode again, and this pole plate is called bipolar plates.Pile tightens together by front end-plate, end plate and pull bar.

After fuel cell pile has been assembled, an important indicator of impermeability quality testing, security when being directly connected to fuel cell operation and stability, therefore air tightness test is a vital ring in the fuel cell assembling process, guarantee its correctness and high efficiency.

In actual mechanical process, the work of disassembling pipe joint is very loaded down with trivial details time-consuming.

The patent No. is that the utility model patent of CN201010562125.5 is mentioned bipolar plates and compressed by the upper and lower mould on the device, feeds test gas and pressurize to MUT module under test, determines the impermeability of MUT module under test according to the variation of MUT module under test internal pressure between hold period.But this device to test only is the impermeability of bipolar plates, rather than bipolar plates is dressed up the impermeability of the bipolar plates behind the pile, bipolar plates is difference to some extent at the stressing conditions on this proving installation and actual stressing conditions after dressing up pile, so this device just tentatively reflects the impermeability of bipolar plates.

The patent No. be the utility model patent of CN201010147807.X mention a kind of can automatic feed, detect bipolar plate tightness, the equipment of letter sorting automatically, this equipment is to produce for bipolar plates, after the qualified bipolar plates of impermeability was dressed up pile, the impermeability of pile still might be underproof.

More than 2 patents only be at wherein a kind of part---the air tightness test of " bipolar plates " of forming pile, it is not the whole bubble-tight test at pile, because even the air tightness test of monolithic " bipolar plates " is qualified, when many dress up a pile after, the impermeability of pile is also not necessarily qualified.

The air tightness test of pile substantially all needs to finish through following step:

1. two gas piping joints are installed, a liquid coolant pipeline;

2. three pipelines are fed gas successively and carry out omission survey in the pile;

3. pile is positioned in the water, three pipelines is fed gas respectively carry out the pile detection that leaks outside, and change bipolar plates or membrane electrode according to the position of bubble.

Step 1 li, operating personnel need install 4-6 joint, install some minutes approximately consuming time, and leak hunting when defective when pile, need to remove pipe joint again, search reason, after finishing, need installation pipeline joint again, when the pile impermeability has problem, need the repeated disassembled and assembled pipe joint, duplication of labour amount is too much, wastes time and energy.

Step 3 li, operating personnel need pile is placed in and carry out the pile detection that leaks outside in the pond, if test failure then needs to remove pipe joint again, repeating step 1,2, the processing requirement that does not reach pile industrialization high efficiency.

The utility model content

Because the problems referred to above that prior art exists, the purpose of this utility model are to propose the quick air tightness detection equipment of a kind of fuel cell pile, it can solve the problems referred to above that prior art exists.

For achieving the above object, the utility model is achieved by the following technical programs:

The quick air tightness detection equipment of a kind of fuel cell pile, comprise pile, pond, pile is positioned in the groove of anchor clamps in the pond, and pile has the one side of gas inlet and outlet to contact with the face of trench bottom, and seal the gas inlet and outlet position of this pile with silica gel pad, anchor clamps are provided with two rotating clamping plate, and these clamping plate make it closely to link to each other with jig main body with web member after pushing down the plate at two ends on the pile respectively; Anchor clamps are provided with three gas pipings, and gas enters pile inside by the gas piping group again through anchor clamps.

As further feature of the present utility model, described web member is hand tighten screw.

Owing to adopt above technical scheme, the quick air tightness detection equipment installation of a kind of fuel cell pile of the present utility model and dismounting are all simple, convenient, both can detect the internal gas leakage situation of fuel cell pile, can detect the extraneous gas leakage situation again.

Description of drawings

The utility model is described in further detail with specific embodiment with reference to the accompanying drawings below:

Front cross-sectional view when Fig. 1 does not place pile for the utility model

Fig. 2 is the pile synoptic diagram in the utility model

Front cross-sectional view when Fig. 3 places pile for the utility model

Wherein: 1, water lines; 2, the gas piping group; 3, anchor clamps; 4, the pond; 7, gathering sill; 8, pile is placed surface of contact; 9, silica gel pad; 10, clamping plate; 11, pile; 12, hand tighten screw; 13, valve; 14, tensimeter; 15, draining valve

Embodiment

As Fig. 1,2, shown in 3, the quick air tightness detection equipment of a kind of fuel cell pile of the present utility model, this equipment is formed when using, earlier pile 11 is positioned in the gathering sill 7 on the anchor clamps 3 in the pond 4, the oral area of groove has one section gradient to be conducive to install guiding, pile 11 has the one side of gas inlet and outlet to contact with the face of groove 7 bottoms, silica gel pad 9 is arranged at groove 7 bottoms, be used for the sealing at pile 11 gas inlet and outlet positions, two rotating clamping plate 10 are arranged on the pile anchor clamps 3, utilize clamping plate 10 to push down the plate of the end on the pile 11, two hand tighten screws 12 are arranged on the clamping plate 10, it links to each other clamping plate 10 with pile anchor clamps 3 main bodys, revolve tighter and tighter, strengthen pile 11 and pile anchor clamps 3 closeness of contact, carry out omission survey in the pile 11 then, one gas piping group 2 is arranged on the pile anchor clamps 3, here be three gas pipelines, connected three gas pipings respectively, open wherein one tunnel gas valve 13, the valve of other two-way keeps closing, gas enters pile 11 inside by pipeline again through pile anchor clamps 3, and valve-off sees that the decline situation of the tensimeter 14 of air inlet pipeline is judged pile internal gas leakage situation, according to this method, test two other pipeline respectively.After the interior omission survey of pile is qualified, the fetch boiling water inlet valve of pipeline 1, water is piled the pond, valve-off is opened wherein one tunnel gas valve, and the valve of other two-way keeps closing, whether observe the pile outside has bubble to take place, the words that have can be used a marking, change graphite cake or membrane electrode according to this, have transparency window can observe the gas leakage situation on pile 11 surfaces on the 4 side walls of pond.

The process of taking out pile screws out hand tighten screw 12 exactly, and the reverse side of hand tighten screw 12 has individual nut to be used for preventing that hand tighten screw breaks away from clamping plate 10, launches clamping plate 10, takes out pile 11 and gets final product, and opens draining valve 15 then, and water is drained.

But above-mentioned embodiment is exemplary, is to be the restriction that this patent is comprised scope in order better to make those skilled in the art can understand this patent, can not to be interpreted as; So long as according to spirit that this patent discloses do anyly be equal to change or modify, all fall into the scope that this patent comprises.

Claims

1. quick air tightness detection equipment of fuel cell pile, it is characterized in that: comprise pile, pond, pile is positioned in the groove of anchor clamps in the pond, and pile has the one side of gas inlet and outlet to contact with the face of trench bottom, and seal the gas inlet and outlet position of this pile with silica gel pad, anchor clamps are provided with two rotating clamping plate, and these clamping plate make it closely to link to each other with jig main body with web member after pushing down the plate at two ends on the pile respectively; Anchor clamps are provided with three gas pipings, and gas enters pile inside by the gas piping group again through anchor clamps.

2. air tightness detection equipment according to claim 1, it is characterized in that: described web member is hand tighten screw.