CN218939735U

CN218939735U - Fuel cell bipolar plate flow resistance test equipment

Info

Publication number: CN218939735U
Application number: CN202223042802.8U
Authority: CN
Inventors: 徐丛欣; 李冬冬
Original assignee: Shanghai H Rise New Energy Technology Co Ltd
Current assignee: Shanghai H Rise New Energy Technology Co Ltd
Priority date: 2022-11-16
Filing date: 2022-11-16
Publication date: 2023-04-28
Anticipated expiration: 2032-11-16

Abstract

The utility model provides fuel cell bipolar plate flow resistance test equipment, which comprises a shell, a pressure gauge, a pressure reducing valve, a pressure sensor, a small flow controller, an air pipe, a pipeline connector and a bipolar plate sealing tool, wherein the pressure gauge is arranged on the shell; the pressure gauge is arranged on one side of the shell, the pressure reducing valve is arranged above the shell, the pressure sensor is arranged inside the shell, the small flow controller is arranged on one side inside the shell, the air pipe is connected with the shell and the bipolar plate sealing tool, and the pipeline connector is arranged on the air pipe; the bipolar plate sealing tool comprises an air inlet and an air outlet; the air inlet is connected with the air pipe. The utility model has the beneficial effects that: the structure is simple, the universality is strong, and the flow resistance test requirement of the bipolar plate can be met.

Description

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 fuel cell bipolar plate flow resistance testing equipment.

Background

The fuel cell is an electrochemical device for directly converting chemical energy of fuel into electric energy, and has the advantages of high power density, high conversion rate, low environmental pollution and the like. Proton exchange membrane fuel cells (Proton Exchange Membrane Fuel Cell, PEMFC for short) belong to one of the fuel cells. In general, a fuel cell is composed of a plurality of membrane electrodes and bipolar plates alternately stacked. The bipolar plate is used as a core component of a fuel cell, and plays a great number of important roles of supporting a membrane electrode structure, separating hydrogen and oxygen, collecting electrons, conducting heat, providing hydrogen and oxygen channels, draining water generated by reaction, providing a cooling liquid flow channel and the like in the fuel cell, and the performance of the fuel cell is greatly dependent on a flow field structure.

Among them, the resistance characteristic of the flow field is an important index for evaluating the rationality of the flow field design. The flow resistance of the hydrogen and air sides influences the pressure gradient of the gas at the two sides in the flow path, the concentration of the gas component, and the concentration distribution of the water vapor and the liquid water component; and 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 (the air chamber, the hydrogen chamber and the cooling chamber) also affects the flow distribution uniformity of each cell of the electric pile, thereby affecting the performance and the service life of the fuel cell.

At present, the flow resistance of the polar plate is generally obtained by adopting simulation calculation, but a simulation model is generally subjected to simplification treatment and has a certain difference from the actual structure of the bipolar plate, and meanwhile, the simulation assumption and the boundary condition are 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 detecting the flow resistance of a fuel cell are complicated in structure, inconvenient to operate, and have an influence on the test efficiency, and there is still a need for improvement.

Disclosure of Invention

In order to solve the technical problems, the utility model discloses a fuel cell bipolar plate flow resistance test device, and the technical scheme of the utility model is implemented as follows:

a flow resistance testing device for a bipolar plate of a fuel cell comprises a shell, a pressure gauge, a pressure reducing valve, a pressure sensor, a small flow controller, an air pipe, a pipeline connector and a bipolar plate sealing tool;

the pressure gauge is arranged on one side of the shell, the pressure reducing valve is arranged above the shell, the pressure sensor is arranged inside the shell, the small flow controller is arranged on one side inside the shell, the air pipe is connected with the shell and the bipolar plate sealing tool, and the pipeline connector is arranged on the air pipe;

the bipolar plate sealing tool comprises an air inlet and an air outlet;

the air inlet is connected with the air pipe.

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

Preferably, the pressure sensor is a digital pressure sensor.

Preferably, the air tube is connected to an external air source through the housing.

Preferably, the external gas source comprises air or nitrogen.

By implementing the technical scheme of the utility model, the technical problem that explosion injury occurs due to overlarge bearing of the oil cylinder joint in the prior art can be solved; by implementing the technical scheme of the utility model, the safety of the work of the oil cylinder is improved by designing the joint explosion-proof mechanism at the joint, and the technical effect of protecting personnel from the explosion injury of the joint can be realized.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only one embodiment of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

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

FIG. 1 is a schematic diagram of an embodiment;

FIG. 2 is a schematic structural view of the housing;

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

In the above drawings, each reference numeral indicates:

1, a shell;

2, a pressure gauge;

3, a pressure reducing valve;

4, a digital pressure sensor;

5, a small flow controller;

6, an air pipe;

7, T-shaped tee joint;

8, bipolar plate sealing tool;

801, air inlet;

802, air outlet.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples

In a specific embodiment, as shown in fig. 1, 2 and 3, a fuel cell bipolar plate flow resistance test device comprises a shell 1, a pressure gauge 2, a pressure reducing valve 3, a digital pressure sensor 4, a small flow controller 5, an air pipe 6, a T-shaped tee 7 and a bipolar plate sealing tool 8;

the pressure gauge 2 is arranged on one side of the shell 1, the pressure reducing valve 3 is arranged above the shell 1, the digital pressure sensor 4 is arranged inside the shell 1, the small flow controller 5 is arranged on one side inside the shell 1, the air pipe 6 is connected with the shell 1 and the bipolar plate sealing tool 8, and the T-shaped tee joint 7 is arranged on the air pipe 6;

the bipolar plate sealing tool 8 comprises 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 shell 1 to be connected with an external air source.

The external gas source comprises air or nitrogen.

Air or nitrogen is used as a gas source in the test, and the gas source is wide in source, easy to obtain and low in cost, and in other embodiments, other types of gases such as oxygen, hydrogen, rare gas and the like can be used as the gas source.

In this embodiment, the pressure reducing valve 3 can stabilize the gas inlet pressure, provide a quantitative pressure, protect the small flow controller 5 and the digital pressure sensor 4 from exceeding the measuring 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, while the digital pressure sensor 4 is used to read the pressure of the air inlet 801. The small flow controller 5 is used to control the flow rate of the gas.

The air outlet 802 is communicated with the atmosphere, namely the air pressure 0, and the digital pressure sensor 4 measures the pressure value at the air inlet 801, namely the pressure difference between the air inlet 801 and the air outlet 802 of the bipolar plate.

According to poiseuille law Q=deltap/R, the pressure difference deltap at the two ends of the inlet and the outlet of the bipolar plate is tested by controlling the inlet flow Q, so that the requirement of testing the flow resistance R is met. The digital pressure sensor 4/small flow controller 5 reading is the required flow resistance R.

It should be noted that the above-mentioned embodiments are only preferred embodiments of the present utility model, and are not intended to limit the present utility model, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The flow resistance testing device for the bipolar plate of the fuel cell is characterized by comprising a shell, a pressure gauge, a pressure reducing valve, a pressure sensor, a small flow controller, an air pipe, a pipeline connector and a bipolar plate sealing tool;

the bipolar plate sealing tool comprises an air inlet and an air outlet;

the air inlet is connected with the air pipe.

2. The fuel cell bipolar plate flow resistance testing apparatus according to claim 1, wherein the pipe connection head is a T-tee.

3. A fuel cell bipolar plate flow resistance testing arrangement according to claim 2, wherein said pressure sensor is a digital pressure sensor.

4. A fuel cell bipolar plate flow resistance testing apparatus according to claim 3 wherein said air tube is connected to an external air source through said housing.

5. A fuel cell bipolar plate flow resistance testing apparatus according to claim 4, wherein said external gas source comprises air or nitrogen.