Test fixture convenient for mounting fuel cell

Abstract

The utility model provides a test fixture convenient for mounting a fuel cell, and solves the technical problems that the manual assembly operation of a fuel cell test fixture in the prior art is complicated, the uniformity of pressing force cannot be ensured, and the pressing force cannot be flexibly adjusted. The device comprises a base, a pressure-bearing assembly and a clamping and positioning assembly, the base comprises a bottom plate, a shock insulator, a power supply and a turn button; the pressure bearing assembly comprises two pressure bearing plates, two bearing telescopic shafts, a plurality of pressure sensors and two pressure display screens; the clamping and positioning assembly comprises a rotating shaft and two clamp positioning rods.

Description

TECHNICAL FIELD

[0001] The utility model belongs to fuel cell fixed technical field, more particularly to a test fixture convenient to install fuel cell. BACKGROUND

[0002] Fuel cell is a kind of energy conversion device, and it is isothermal to convert the chemical energy stored in fuel and oxidant into electric energy directly;And fuel cell test fixture is a tool or equipment for clamping and fixing fuel cell, and fuel cell is fixed in a specific position to test its discharge performance.Fuel cell includes anode end plate, anode current collector plate, anode side sealing gasket, membrane electrode (MEA), cathode side sealing gasket, cathode current collector plate and cathode end plate arranged in sequence, and hydrogen / fuel inlet and outlet are arranged on the both sides of anode current collector plate, and air / oxygen inlet and outlet are arranged on the both sides of cathode current collector plate;Among them, the membrane electrode composed of catalyst layer and proton exchange membrane is the core component of fuel cell.Fuel cell has the advantages of high efficiency, clean, low noise, high reliability and the like.Fuel cell test includes development test, durability test and product performance test, and it is essential in fuel cell research and development stage and actual operation stage, so fuel cell test is crucial to improve fuel cell technology.

[0003] The existing fuel cell test fixture usually uses eight uniformly distributed fastening bolts to clamp and fasten the battery, and the adjustment of clamping force is realized by changing the torque applied on the bolt, which is very time-consuming and laborious when the membrane electrode to be tested needs to be repeatedly disassembled and replaced, and in the long-term use process, the loosening or thread slipping of the bolt can cause clamping force deviation and local stress unevenness, which has a very serious impact on the air tightness of fuel cell and the contact condition of components, and manual pressing can easily cause the membrane electrode in fuel cell to slip due to uneven force of each locking point;At the same time, the traditional fuel cell test fixture does not have the function of real-time monitoring of assembly pressure and pressure distribution, which can easily cause overpressure or poor pressing during installation, and the practicability is greatly reduced.

[0004] Therefore, the utility model designs a test fixture convenient to install fuel cell. SUMMARY

[0005] The utility model discloses a test fixture convenient to install fuel cell solves the technical problem that fuel cell test fixture in prior art manual assembly operation is complex, cannot guarantee the uniformity of pressing force, and pressing force cannot be flexibly adjusted, and provides a test fixture convenient to install fuel cell.

[0006] To achieve the above-mentioned purpose, the technical solution provided by the utility model is:

[0007] A test fixture convenient to install fuel cell, which is characterized by comprising a base, a pressure-bearing assembly and a clamping and positioning assembly.

[0008] The base comprises a base plate, a spacer, a power supply and a knob; wherein the spacer is laid in the middle of the base plate, and the power supply and the knob are both arranged at the base plate without the spacer; wherein the base plate is used to support the whole fuel cell, and the spacer is used to reduce the frictional resistance when the pressure bearing plate is subjected to external force;

[0009] The pressure bearing assembly comprises two pressure bearing plates, two load-bearing telescopic shafts, a plurality of pressure sensors and two pressure display screens.

[0010] The two pressure bearing plates are symmetrically arranged on the two sides of the spacer and are perpendicular to the spacer, and can move towards or away from each other on the spacer under the action of external force; the two load-bearing telescopic shafts are respectively connected to the outer sides of the two pressure bearing plates, and can apply external force to the corresponding pressure bearing plate under the control and adjustment of the power supply and the knob, and the length of the load-bearing telescopic shaft is adjusted with the change of displacement, that is, the load-bearing telescopic shaft is driven by turning on the power supply, and the size of the force can be adjusted by the knob; the fuel cell is installed between the two pressure bearing plates by the clamping and positioning assembly, so that the fuel cell can be uniformly stressed; the plurality of pressure sensors are evenly distributed on the anode end plate and the cathode end plate of the fuel cell for measuring pressure; the two pressure display screens are respectively arranged on the anode end plate and the cathode end plate for displaying pressure, so as to facilitate the operator to observe the uniform stress of the anode end plate and the cathode end plate;

[0011] The clamping and positioning assembly comprises a rotating shaft and two clamp positioning rods; the rotating shaft vertically penetrates and threadedly connects the two pressure bearing plates and is located above the fuel cell, and can rotate when the pressure bearing plate is subjected to external force to enable the pressure bearing plate to move linearly thereon; the two clamp positioning rods are separately arranged on the two sides and vertically penetrate and connect the whole fuel cell and the two pressure bearing plates, and are used to fix the position of the fuel cell, and the two clamp positioning rods are preferably symmetrically arranged to more accurately fix the positions of the elements of the fuel cell;

[0012] The above installed fuel cell is the same as the fuel cell in the background art, comprising an anode end plate, an anode current collector plate, an anode side sealing gasket, a membrane electrode assembly (MEA), a cathode side sealing gasket, a cathode current collector plate and a cathode end plate arranged in sequence, and the two sides of the anode current collector plate are provided with hydrogen / fuel inlets and outlets, and the two sides of the cathode current collector plate are provided with air / oxygen inlets and outlets, which are connected with the pipelines of the test bench.

[0013] Further, the load-bearing telescopic shaft is in the shape of inverted L as a whole, comprising a vertical rod and a horizontal rod with telescopic function; wherein the vertical rod is vertically arranged on the base plate without the spacer, and the end of the horizontal rod is connected with the outer side of the pressure bearing plate.

[0014] Further, the clamp positioning rod has telescopic function, so that the external structure of the installed clamp positioning rod is relatively short and occupies small space.

[0015] Further, the number of the pressure sensors is selected according to specific conditions, in order to more accurately detect the pressing force on the fuel cell, eight pressure sensors are arranged in the utility model, four of which are arranged on the anode end plate surface, and the other four are arranged on the cathode end plate surface.

[0016] Further, the spacer surface is coated with a smooth coating layer to reduce the friction between objects.

[0017] The utility model has the advantages of:

[0018] The utility model provides a test fixture convenient for installing fuel cell, fuel cell can be positioned on the fixture and clamped for testing, when fuel cell needs to be disassembled after testing, fuel cell can be disassembled by restoring the load telescopic shaft to the original position, the whole dismounting process is very convenient, short in time, through the cooperation of the load telescopic shaft and the pressure bearing plate on both sides, uniform pressing force can be ensured, the pressing force can be flexibly adjusted, and the utility model has the advantages of high applicability and free control. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The utility model provides a fuel cell test fixture's whole structure schematic view for embodiment of the utility model;

[0020] The reference signs are as follows:

[0021] 1 - bottom plate, 2 - spacer, 3 - power supply, 4 - pressure bearing plate, 5 - load telescopic shaft, 6 - pressure sensor, 7 - pressure display screen, 8 - anode end plate, 9 - anode current collecting plate, 10 - gasket, 11 - membrane electrode, 12 - cathode current collecting plate, 13 - cathode end plate, 14 - rotating shaft, 15 - fixture positioning rod, 16 - rotating knob. DETAILED DESCRIPTION

[0022] The content of the utility model is further described in detail in combination with the drawings and specific embodiments:

[0023] The fuel cell comprises an anode end plate, an anode current collecting plate, an anode side sealing gasket, a membrane electrode (MEA), a cathode side sealing gasket, a cathode current collecting plate and a cathode end plate arranged in sequence, and the anode current collecting plate is provided with hydrogen / fuel inlets and outlets on both sides, and the cathode current collecting plate is provided with air / oxygen inlets and outlets on both sides, and the pipeline is connected with the test bench.

[0024] As shown in Figure 1 A test fixture convenient for installing fuel cell comprises a base, a pressure bearing assembly and a clamping and positioning assembly.

[0025] The base comprises a base plate, a spacer, a power supply and a knob; the spacer is laid in the middle of the base plate, and the power supply and the knob are both arranged at the part of the base plate where the spacer is not laid; the base plate is used to support the whole fuel cell, and the surface of the spacer is coated with a smooth plastic coating to reduce the frictional resistance when the pressure plate is subjected to external force.

[0026] The pressure-bearing assembly comprises two pressure plates, two load-bearing telescopic shafts, eight pressure sensors and two pressure display screens. The two pressure plates are symmetrically arranged on the two sides of the spacer and are perpendicular to the spacer, and can move towards or away from each other on the spacer under the action of external force; the fuel cell is installed between the two pressure plates by the clamping and positioning assembly, so that the fuel cell can be uniformly stressed. The two load-bearing telescopic shafts are respectively connected to the outer sides of the two pressure plates, and the load-bearing telescopic shafts are integrally in the shape of inverted L, comprising a vertical rod and a horizontal rod with telescopic function; the vertical rod is vertically arranged on the base plate where the spacer is not laid, and the end of the horizontal rod is connected to the outer side of the pressure plate; under the control and adjustment of the power supply and the knob, external force is applied to the corresponding pressure plate, and the length of the load-bearing telescopic shaft is adjusted as the displacement changes, that is, the load-bearing telescopic shaft can be driven by turning on the power supply, the size of the pushing force can be adjusted by the knob, and the size of the pushing force can be adjusted by the knob. The eight pressure sensors are evenly distributed on the anode end plate and the cathode end plate of the fuel cell for measuring pressure, four of which are evenly distributed on the side of the anode end plate, and the other four are evenly distributed on the side of the cathode end plate. Two pressure display screens are arranged on the anode end plate and the cathode end plate respectively for displaying pressure, which is convenient for the operator to observe the uniform stress of the anode end plate and the cathode end plate.

[0027] The clamping and positioning assembly comprises a rotating shaft and two clamp positioning rods. The rotating shaft penetrates the two pressure plates and is located above the fuel cell, and can rotate when the pressure plate is subjected to external force to make the pressure plate move linearly thereon. The two clamp positioning rods are separately arranged on the two sides and vertically penetrate the entire fuel cell and the two pressure plates, and are used to fix the positions of various components of the fuel cell, and the two clamp positioning rods are preferably symmetrically arranged to more accurately fix the positions of various components of the fuel cell; each clamp positioning rod has telescopic function, so that the external structure of the installed clamp positioning rod is shorter and occupies less space.

[0028] The above-mentioned base plate, spacer, load-bearing telescopic shaft and pressure plate are integrated equipment.

[0029] The working principle is as follows:

[0030] In the actual product, the pressure plate, the load-bearing telescopic shaft and the rotating shaft have been assembled in advance. During installation, first install the two clamp positioning rods in the circular slot holes of one side of the pressure plate, then install the fuel cell, and make the various components precisely butt joint together, then pass the clamp positioning rods through the various components and install them in the circular slot holes of the other side of the pressure plate. During the entire process, the fuel cell always maintains a vertical state with the clamp positioning rods and the base plate.

[0031] When the fuel cell needs to be tested, the power supply is turned on, the load telescopic shaft is started to slowly push the two pressure plates to apply pressure to the fuel cell, and the pressure value on the pressure sensor is adjusted in time through the knob; when the fuel cell needs to be disassembled after the test is completed, the knob is set to zero, the load telescopic shaft drives the pressure plate to retract reversely under the action of the rebound force, and the fuel cell loses the pressure and disintegrates.

[0032] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered within the protection scope of the present application.

Claims

1. A test fixture for easy installation of fuel cells, characterized in that: The test fixture comprises a base, a pressure bearing assembly and a clamping positioning assembly. The base comprises a base plate, a spacer, a power supply and a knob, wherein the spacer is laid in the middle of the base plate, and the power supply and the knob are arranged on the base plate without the spacer. The pressure bearing assembly comprises two pressure bearing plates, two load-bearing telescopic shafts, a plurality of pressure sensors and two pressure display screens. The two pressure bearing plates are symmetrically arranged on the two sides of the spacer and perpendicular to the spacer, and can move towards or away from each other on the spacer under the action of external force; the two load-bearing telescopic shafts are respectively connected to the outer sides of the two pressure bearing plates, and can apply external force to the corresponding pressure bearing plate under the control and adjustment of the power supply and the knob; the fuel cell is installed between the two pressure bearing plates by the clamping positioning assembly; the plurality of pressure sensors are evenly distributed on the anode end plate and the cathode end plate of the fuel cell for measuring pressure; the two pressure display screens are respectively arranged on the anode end plate and the cathode end plate for displaying pressure. The clamping positioning assembly comprises a rotating shaft and two clamp positioning rods; the rotating shaft vertically penetrates and threadedly connects the two pressure bearing plates and is located above the fuel cell, and can rotate when the pressure bearing plates are subjected to external force to enable the pressure bearing plates to move linearly thereon; the two clamp positioning rods are separately arranged on the two sides and vertically penetrate and connect the entire fuel cell and the two pressure bearing plates to fix the position of the fuel cell.

2. The test fixture for facilitating installation of a fuel cell according to claim 1, wherein: The load-bearing telescopic shaft is in the shape of an inverted L as a whole, comprising a vertical rod and a horizontal rod with telescopic function; wherein the vertical rod is vertically arranged on the base plate without the spacer, and the end of the horizontal rod is connected to the outer side of the pressure bearing plate.

3. The test fixture for facilitating installation of a fuel cell according to claim 1 or 2, wherein: The clamp positioning rod has telescopic function.

4. The test fixture for facilitating installation of a fuel cell according to claim 3, wherein: The pressure sensor has eight, four of which are evenly distributed on the side of the anode end plate, and the other four are evenly distributed on the side of the cathode end plate.

5. The test fixture for facilitating installation of a fuel cell according to claim 4, wherein: The surface of the spacer is coated with a smooth coating.

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