Hydrogen supply device for fuel cell test

Abstract

The utility model discloses a hydrogen supply device for fuel cell testing, which comprises a hydrogen input pipe, a tail discharge pipe, a back pressure valve, a hydrogen circulating pipeline, a pneumatic control valve, a gas-liquid separation device and a circulating pump, the hydrogen input pipe is communicated with the input end of a fuel cell, the tail discharge pipe is communicated with the output end of the fuel cell, the back pressure valve is arranged on the tail discharge pipe, and the gas-liquid separation device is arranged on the gas-liquid separation device. The hydrogen input pipe is communicated with the tail discharge pipe through a hydrogen circulating pipeline, and a pneumatic control valve, a gas-liquid separation device and a circulating pump are sequentially arranged on the hydrogen circulating pipeline in the gas flowing direction. The hydrogen supply device for the fuel cell test has the advantages that unreacted hydrogen can be subjected to gas-liquid separation through the hydrogen circulating pipeline and the gas-liquid separation device and then is circulated to the inlet of the fuel cell for reaction again, so that the utilization rate of the hydrogen is improved, and the use cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to fuel cell technical field, specifically relate to a hydrogen supply device for fuel cell test. BACKGROUND

[0002] Hydrogen fuel cell is a kind of hydrogen oxygen as raw fuel, chemical energy is converted into electric energy device.Fuel cell has high energy conversion rate, zero pollution etc.Point, therefore has extensive application prospect.Fuel cell test system mainly provides a stable, safe, convenient test platform for fuel cell.Fuel cell test system is mainly composed of hydrogen supply system, air supply system and water thermal management system.In the fuel cell test process, each subsystem needs to coordinate power matching, provides favorable working conditions for the normal operation of fuel cell, and fuel cell test system provides great help for the development and research of fuel cell, and promotes the development of hydrogen fuel cell industry.

[0003] For example, the Chinese patent literature with the publication number CN116598545A discloses a kind of test method of fuel cell test platform, and test step includes editing test method, data processing analysis, report generation, avoids the error caused by artificial input through editable built-in logic test method and settable data processing analysis, improves the accuracy of product judgment, greatly improves the efficiency of overall process.But the hydrogen gas that this technology is not reacted in hydrogen loop is directly discharged as tail gas, and the utilization rate of hydrogen gas is low, and use cost is improved. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is how to improve the utilization rate of hydrogen gas and reduce use cost.

[0005] To solve the above technical problems, the utility model provides the following technical scheme:

[0006] A kind of hydrogen supply device for fuel cell test, including hydrogen input pipe, tail pipe, back pressure valve, hydrogen circulation pipeline, pneumatic control valve, gas-liquid separation device and circulating pump, the hydrogen input pipe is communicated with fuel cell input end, the tail pipe is communicated with fuel cell output end, back pressure valve is provided on the tail pipe, hydrogen input pipe and tail pipe are communicated by hydrogen circulation pipeline, gas-liquid separation device and circulating pump are sequentially arranged on the hydrogen circulation pipeline along the direction of gas flow.

[0007] Through the hydrogen supply device for fuel cell test, unreacted hydrogen gas can be recycled to fuel cell inlet again through hydrogen circulation pipeline and gas-liquid separation device after being separated into gas and liquid, improve the utilization rate of hydrogen gas, and reduce use cost.

[0008] Preferably, the gas-liquid separation device comprises a gas-liquid separator, a supporting ring, an air inlet, an air outlet and a water outlet, the supporting ring is clamped inside the gas-liquid separator, the air inlet, the air outlet and the water outlet are arranged on the gas-liquid separator, and the hydrogen circulation pipeline is in communication with the air inlet and the air outlet respectively.

[0009] Preferably, the gas-liquid separator is further provided with a liquid level meter.

[0010] Preferably, the water outlet is further provided with a water outlet electromagnetic valve.

[0011] Preferably, the hydrogen input pipe is further provided with a gas humidification heater.

[0012] Preferably, the hydrogen input pipe is further provided with a first pressure sensor and a first temperature sensor.

[0013] Preferably, the tail pipe is further provided with a second pressure sensor and a second temperature sensor.

[0014] Preferably, the tail pipe is further provided with a pulse electromagnetic valve connected in parallel with the back pressure valve.

[0015] Preferably, the hydrogen circulation pipeline is further provided with a check valve.

[0016] Preferably, the hydrogen storage tank is further provided with a hydrogen input pipe.

[0017] Compared with the prior art, the hydrogen gas supply device for fuel cell test has the following beneficial effects:

[0018] 1. The hydrogen gas supply device for fuel cell test can recycle the unreacted hydrogen to the fuel cell inlet through the hydrogen circulation pipeline and the gas-liquid separation device for reaction again, thereby improving the utilization rate of hydrogen and reducing the use cost.

[0019] 2. The gas-liquid separation device is arranged in front of the circulating pump, and the remaining hydrogen after reaction is subjected to gas-liquid separation, which can improve the hydrogen passing amount of the circulating pump, thereby improving the efficiency of the circulating pump and prolonging the service life of the circulating pump. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structural schematic view of the embodiment of the utility model;

[0021] Figure 2 It is a structural schematic view of the gas-liquid separation device of the embodiment of the utility model;

[0022] Figure 3 It is a structural schematic view of the gas-liquid separator of the embodiment of the utility model. DETAILED DESCRIPTION

[0023] For the person skilled in the art to understand the technical scheme of the utility model, the technical scheme of the utility model will be further described in connection with the drawings of the specification.

[0024] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connecting", "connecting", "fixing" and other terms should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] In the present application, unless specifically defined and limited otherwise, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, the meaning of "multiple" is two or more, unless specifically defined and limited.

[0026] Referring to Figure 1 The embodiment discloses a hydrogen supply device for fuel cell test, which comprises a hydrogen storage tank 1, a hydrogen input pipe 2, a tail pipe 3, a gas humidification heater 4, a first pressure sensor 5, a first temperature sensor 6, a second pressure sensor 7, a second temperature sensor 8, a back pressure valve 9, a pulse electromagnetic valve 10, a hydrogen circulation pipe 11, a pneumatic valve 12, a gas-liquid separation device 13, a circulating pump 14 and a check valve 15.

[0027] The output end of the hydrogen storage tank 1 is communicated with the input end of the fuel cell 16 through the hydrogen input pipe 2, and the hydrogen input pipe 2 is sequentially provided with the gas humidification heater 4, the first pressure sensor 5 and the first temperature sensor 6 along the hydrogen flow direction.

[0028] The tail pipe 3 is communicated with the output end of the fuel cell 16, and the tail pipe 3 is sequentially provided with the second temperature sensor 8, the second pressure sensor 7 and the back pressure valve 9 along the gas flow direction, and the pulse electromagnetic valve 10 is further provided on the tail pipe 3 in parallel with the back pressure valve 9. In the test process, the pulse electromagnetic valve 10 can be opened according to the actual need to drain water, so as to prevent the liquid water after reaction from entering the fuel cell 16 and causing the fuel cell 16 to be blocked.

[0029] The tail pipe 3 between the second pressure sensor 7 and the back pressure valve 9 is communicated with the hydrogen input pipe 2 between the gas humidification heater 4 and the first pressure sensor 5 through the hydrogen circulation pipeline 11, and the hydrogen circulation pipeline 11 is sequentially provided with the air control valve 12, the gas-liquid separation device 13, the circulation pump 14 and the check valve 15 in the gas flow direction.

[0030] Specifically, the hydrogen circulation mode is opened, the air control valve 12 is opened, the back pressure valve 9 is completely closed, the unreacted hydrogen in the tail pipe 3 enters the gas-liquid separation device 13 through the hydrogen circulation pipeline 11 for gas-liquid separation, the separated hydrogen enters the circulation pump 14, the circulation pump 14 pressurizes the hydrogen to return to the hydrogen input pipe 2, and the hydrogen enters the fuel cell 16 again to complete the hydrogen circulation.

[0031] The gas-liquid separation device 13 is arranged before the circulation pump 14 to separate the unreacted hydrogen after the reaction, and the separation efficiency can reach 99%, which can improve the hydrogen amount of the circulation pump 14, thereby improving the efficiency of the circulation pump 14, and improving the service life of the circulation pump 14. Moreover, the structure of the hydrogen circulation pipeline 11 is simple and small in size, can be integrated in the test bench, does not need to be externally arranged, saves space, and is convenient for later maintenance.

[0032] Referring to Figure 2 and Figure 3 , the gas-liquid separation device 13 includes a gas-liquid separator 131, a support ring 132, an air inlet 133, an air outlet 134, a drain outlet 135, a liquid level meter 136 and a drain electromagnetic valve 137, the support ring 132 is arranged in the gas-liquid separator 131, the support ring 132 is used for mounting a filter element, the gas-liquid separator 131 is provided with the air inlet 133, the air outlet 134, the drain outlet 135 and the liquid level meter 136, the hydrogen circulation pipeline 11 is communicated with the air inlet 133 and the air outlet 134, and the drain outlet 135 is further provided with the drain electromagnetic valve 137.

[0033] Specifically, when the liquid level meter 136 detects that the liquid level in the gas-liquid separator 131 exceeds the set value, the drain electromagnetic valve 137 is opened to drain water, and when the liquid level exceeds the set value, the drain electromagnetic valve 137 is closed.

[0034] The internal structure of the gas-liquid separation device 13 is simple and convenient to maintain, only the filter element on the support ring 132 needs to be maintained periodically, and the use and maintenance cost is low.

[0035] The working process of the embodiment is as follows:

[0036] When the fuel cell 16 starts the test work, the hydrogen circulation mode is opened according to the requirement, at this time the pneumatic valve 12 is opened, the back pressure valve 9 is completely closed, the unreacted hydrogen in the tail pipe 3 enters the gas-liquid separator 131 through the hydrogen circulation pipeline 11 to carry out the gas-liquid separation, the separated hydrogen enters the circulating pump 14 again, the circulating pump 14 carries out the pressure boosting to make the hydrogen return to the hydrogen input pipe 2, enters the fuel cell 16 again, and the hydrogen circulation is completed. When the gas-liquid separation is carried out in the gas-liquid separator 131, when the liquid level meter 136 monitors that the liquid level in the gas-liquid separator 131 exceeds the set value, the drain electromagnetic valve 137 is opened to carry out the drainage, when the liquid level exceeds the set value, the drain electromagnetic valve 7 is closed.

[0037] In summary, when the hydrogen fuel cell 16 starts the test, the hydrogen fuel cell test hydrogen supply device in the embodiment can circulate the unreacted hydrogen to the inlet of the fuel cell 16 again through the hydrogen circulation pipeline 11 and the gas-liquid separation device 13 to carry out the reaction again, improve the utilization rate of the hydrogen, and reduce the use cost.

[0038] It is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims instead of the above description, therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model, any figure mark in the claims should not be regarded as limiting the involved claims.

[0039] The above-mentioned embodiments only represent the implementation of the utility model, the protection scope of the utility model is not only limited to the above-mentioned embodiments, for those skilled in the art, on the premise of not departing from the utility model concept, can also make a number of deformation and improvement, these all belong to the protection scope of the utility model.

Claims

1. A hydrogen supply device for fuel cell testing, characterized in that: The device includes a hydrogen input pipe, a tailpipe, a back pressure valve, a hydrogen circulation pipeline, a gas control valve, a gas-liquid separator, and a circulation pump. The hydrogen input pipe is connected to the input end of the fuel cell, and the tailpipe is connected to the output end of the fuel cell. The tailpipe is equipped with a back pressure valve. The hydrogen input pipe and the tailpipe are connected by a hydrogen circulation pipeline. The hydrogen circulation pipeline is equipped with a gas control valve, a gas-liquid separator, and a circulation pump in sequence along the gas flow direction.

2. The hydrogen supply device for fuel cell testing according to claim 1, characterized in that: The gas-liquid separation device includes a gas-liquid separator, a support ring, an air inlet, an air outlet, and a drain outlet. The support ring is installed inside the gas-liquid separator. The gas-liquid separator is provided with an air inlet, an air outlet, and a drain outlet. The hydrogen circulation pipeline is connected to the air inlet and the air outlet, respectively.

3. The hydrogen supply device for fuel cell testing according to claim 2, characterized in that: The gas-liquid separator is also equipped with a level gauge.

4. A hydrogen supply device for fuel cell testing according to claim 2, characterized in that: A drain solenoid valve is also installed on the drain outlet.

5. A hydrogen supply device for fuel cell testing according to claim 1, characterized in that: The hydrogen input pipe is also equipped with a gas humidification heater.

6. A hydrogen supply device for fuel cell testing according to claim 1, characterized in that: The hydrogen input pipe is also equipped with a first pressure sensor and a first temperature sensor.

7. A hydrogen supply device for fuel cell testing according to claim 1, characterized in that: The tailpipe is also equipped with a second pressure sensor and a second temperature sensor.

8. A hydrogen supply device for fuel cell testing according to claim 1, characterized in that: The tailpipe is also equipped with a pulse solenoid valve connected in parallel with the back pressure valve.

9. A hydrogen supply device for fuel cell testing according to claim 1, characterized in that: The hydrogen circulation pipeline is also equipped with a check valve.

10. A hydrogen supply device for fuel cell testing according to claim 1, characterized in that: It also includes a hydrogen storage tank, the output of which is connected to a hydrogen input pipe.

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