CN218939735U - A fuel cell bipolar plate flow resistance test equipment - Google Patents

Abstract

The utility model provides a fuel cell bipolar plate flow resistance test equipment, including a shell, a pressure gauge, a pressure reducing valve, a pressure sensor, a small flow controller, a gas pipe, a pipeline connector and a bipolar plate sealing tool; wherein , the pressure gauge is installed on one side of the housing, the pressure reducing valve is located above the housing, the pressure sensor is located inside the housing, and the small flow controller is located inside the housing. side, the air pipe connects the housing and the bipolar plate sealing tool, and the pipeline connection head is located on the air pipe; the bipolar plate sealing tool includes an air inlet and an air outlet; the air inlet mouth connected to the trachea. Among them, the beneficial effect of the utility model is that the structure is simple, the versatility is strong, and it can meet the requirements of the bipolar plate flow resistance test.

Description

A fuel cell bipolar plate flow resistance test equipment

technical field

The utility model relates to the technical field of fuel cell bipolar plate testing, in particular to a fuel cell bipolar plate flow resistance testing equipment.

Background technique

A fuel cell is an electrochemical device that directly converts the chemical energy of fuel into electrical energy. It has the advantages of high power density, high conversion rate, and low environmental pollution. Proton Exchange Membrane Fuel Cell (PEMFC for short) is a kind of fuel cell. Generally, a fuel cell consists of several membrane electrodes and bipolar plates stacked alternately. As the core component of the fuel cell, the bipolar plate can support the membrane electrode structure, separate hydrogen and oxygen, collect electrons, conduct heat, provide channels for hydrogen and oxygen, discharge water generated by the reaction, and provide cooling fluid flow in the fuel cell. The performance of the fuel cell largely depends on the structure of the flow field.

Among them, the resistance characteristic of the flow field is an important index to evaluate the rationality of the flow field design. The flow resistance of the hydrogen and air sides affects the pressure gradient, gas component concentration, and water vapor and liquid water component concentration distribution of the gas on both sides in the flow path; while the flow resistance of the coolant determines the heat dissipation economy of the cooling system. At the same time, the flow resistance of the three chambers (air chamber, hydrogen chamber and cooling chamber) also affects the flow distribution uniformity of each cell of the stack, thereby affecting the performance and life of the fuel cell.

At present, the flow resistance of the polar plate is generally calculated by simulation, but the simulated model is usually simplified, which is somewhat different from the actual structure of the bipolar plate, and the assumptions and boundary conditions of the simulation are also relatively ideal. Therefore, the data obtained by the simulation calculation cannot accurately reflect the actual situation of the bipolar plate.

In addition, some existing devices for testing the flow resistance of fuel cells are complex in structure and inconvenient to operate, which affects the test efficiency, and there is still a need for improvement.

Contents of the invention

In order to solve the above technical problems, the utility model discloses a fuel cell bipolar plate flow resistance testing equipment, and the technical solution of the utility model is implemented as follows:

A fuel cell bipolar plate flow resistance test equipment, including a shell, a pressure gauge, a pressure reducing valve, a pressure sensor, a small flow controller, a gas pipe, a pipeline connector and a bipolar plate sealing tool;

Wherein, the pressure gauge is installed on one side of the housing, the pressure reducing valve is located above the housing, the pressure sensor is located inside the housing, and the small flow controller is located inside the housing On one side, the gas pipe connects the casing and the sealing tool of the bipolar plate, and the pipeline connector is located on the gas pipe;

The bipolar plate sealing tool includes an air inlet and an air outlet;

The air inlet is connected to the air pipe.

Preferably, the pipeline connector is a T-shaped tee.

Preferably, the pressure sensor is a digital pressure sensor.

Preferably, the air pipe passes through the housing to connect to an external air source.

Preferably, the external gas source includes air or nitrogen.

Implementing the technical solution of the utility model can solve the technical problem in the prior art that the oil cylinder joint is under too much pressure and will cause bursting and hurting people; implementing the technical solution of the utility model can improve the safety of the oil cylinder by designing a joint explosion-proof mechanism at the joint, It can realize the technical effect of protecting personnel from joint burst injury.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description It is only an embodiment of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

Wherein the same components are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "bottom" and "top "Face", "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.

Fig. 1 is the structural representation of embodiment;

Fig. 2 is the structural representation of housing;

Fig. 3 is a schematic structural diagram of a bipolar plate sealing tool.

In the above-mentioned accompanying drawings, each figure number sign represents respectively:

1. Housing;

2. Pressure gauge;

3. Pressure reducing valve;

4. Digital pressure sensor;

5. Small flow controller;

6. Trachea;

7. T-shaped tee;

8. Bipolar plate sealing tooling;

801, an air inlet;

802, air outlet.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Example

In a specific embodiment, as shown in Fig. 1, Fig. 2 and Fig. 3, a fuel cell bipolar plate flow resistance test equipment includes a housing 1, a pressure gauge 2, a pressure reducing valve 3, a digital pressure Sensor 4, small flow controller 5, gas pipe 6, T-shaped tee 7 and bipolar plate sealing tool 8;

Wherein, the pressure gauge 2 is installed on one side of the housing 1, the pressure reducing valve 3 is located above the housing 1, the digital pressure sensor 4 is located inside the housing 1, and the small flow rate The controller 5 is located on the inner side of the housing 1, the air pipe 6 connects the housing 1 and the bipolar plate sealing tool 8, and the T-shaped tee 7 is located on the air pipe 6;

The bipolar plate sealing tool 8 includes an air inlet 801 and an air outlet 802;

The air inlet 801 is connected to the air pipe 6 .

The air pipe 6 passes through the housing 1 to connect to an external air source.

The external gas source includes air or nitrogen.

Air or nitrogen is used as the gas source during the test, which has a wide range of sources, is easy to obtain, and has low cost. In addition, in other embodiments, the gas source can also use other types of gases, such as oxygen or hydrogen or rare gases.

In this embodiment, the pressure reducing valve 3 can stabilize the gas inlet pressure, provide quantitative pressure, protect the small flow controller 5 and the digital pressure sensor 4 from exceeding the range, improve the accuracy of the test, and prolong the service life of the measuring instrument.

The pressure gauge 2 is used to display the real-time pressure, and the function of the digital pressure sensor 4 is to read the pressure of the air inlet 801 . Small-sized flow controller 5 is used for controlling the flow of gas.

The air outlet 802 is connected to the atmosphere, that is, the air pressure is 0. The pressure value measured by the digital pressure sensor 4 at the air inlet 801 is the pressure difference between the air inlet 801 and the air outlet 802 of the bipolar plate.

According to Poiseuille's law Q=Δp/R, the pressure difference Δp at both ends of the inlet and outlet of the bipolar plate is tested by controlling the flow rate Q to meet the requirements of the test flow resistance R. That is, the reading of the digital pressure sensor 4/the reading of the small flow controller 5 is the required flow resistance R.

It should be pointed out that the above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model , should be included within the protection scope of the present utility model.

Claims (5)

1. A fuel cell bipolar plate flow resistance testing equipment, characterized in that it includes a housing, a pressure gauge, a pressure reducing valve, a pressure sensor, a small flow controller, a gas pipe, a pipeline connector and a bipolar plate sealing tool; Wherein, the pressure gauge is installed on one side of the housing, the pressure reducing valve is located above the housing, the pressure sensor is located inside the housing, and the small flow controller is located inside the housing On one side, the gas pipe connects the casing and the sealing tool of the bipolar plate, and the pipeline connector is located on the gas pipe; The bipolar plate sealing tool includes an air inlet and an air outlet; The air inlet is connected to the air pipe. 2 . The fuel cell bipolar plate flow resistance test equipment according to claim 1 , wherein the pipeline connector is a T-shaped tee. 3 . 3 . The fuel cell bipolar plate flow resistance testing equipment according to claim 2 , wherein the pressure sensor is a digital pressure sensor. 4 . 4 . The fuel cell bipolar plate flow resistance testing equipment according to claim 3 , wherein the gas pipe passes through the housing to connect to an external gas source. 5 . The fuel cell bipolar plate flow resistance testing equipment according to claim 4 , wherein the external gas source includes air or nitrogen.

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