Pipeline assembly for fuel cell detection equipment

Abstract

The utility model discloses a pipeline assembly for fuel cell detection equipment, and belongs to electric pile detection equipment. Comprising a mounting plate, a plurality of functional valves and a plurality of detection units which are integrally arranged on the mounting plate, a hydrogen supply pipeline which is connected with a hydrogen source and equipment to be detected and is connected with a preset functional valve and / or the detection units in series, and a nitrogen pipeline which is connected with a nitrogen source and the equipment to be detected and is connected with the preset functional valve and / or the detection units in series, and the tail gas emission pipeline is connected with the to-be-detected equipment and the external atmosphere and is connected with the preset function valve and / or the detection unit in series. According to the utility model, the plurality of functional valves and the plurality of detection units are integrated on the mounting plate, so that a user can reasonably select the functional valves and the detection units according to different objects during debugging to meet the detection requirements of different fuel cells; and meanwhile, the functional valve and the detection unit are fixed through the mounting plate, so that the pipelines are regular, and the problems that the pipelines in the gas path supply system are redundant and difficult to debug are solved.

Description

Technical Field

[0001] The utility model belongs to the field of stack detection equipment, especially a pipeline assembly for a fuel cell detection device. Background Art

[0002] The stack test bench is a device used to test the performance of fuel cell stacks. By controlling parameters such as pressure and temperature inside the stack and measuring output parameters such as current and voltage, the performance of the stack is evaluated. It mainly consists of a main control unit, a gas supply system, a voltage inspection system, etc.

[0003] Among them, as a necessary condition to maintain the efficient and stable operation of the fuel cell under test, the gas supply system at least includes a hydrogen supply circuit and a nitrogen supply circuit, which respectively realize hydrogen fuel supply and residual gas treatment of the stack. There are various types of valve bodies and detection units involved in the hydrogen supply circuit and the nitrogen supply circuit to meet the test requirements of different types and specifications of fuel cells. During the debugging process, it is necessary to adjust the types of valve bodies and detection units and the connection methods of pipelines, so that different types of valve bodies and detection units are distributed throughout the interior of the test bench, resulting in a redundant pipeline and difficult debugging of the entire gas supply system. Summary of the Utility Model

[0004] In order to overcome the above technical defects, the utility model provides a pipeline assembly for a fuel cell detection device to solve the problems involved in the background art.

[0005] The utility model provides a pipeline assembly for a fuel cell detection device, including: a mounting plate, a plurality of function valves and a plurality of detection units integrally arranged on the mounting plate, a hydrogen supply pipeline connecting a hydrogen source and a device under test and serially connecting a predetermined function valve and / or detection unit, a nitrogen pipeline connecting a nitrogen source and a device under test and serially connecting a predetermined function valve and / or detection unit, and an exhaust gas discharge pipeline connecting the device under test and the external atmosphere and serially connecting a predetermined function valve and / or detection unit.

[0006] Preferably or optionally, the function valve includes one or more of a solenoid valve, a pressure reducing valve, a check valve, a needle valve and a back pressure valve.

[0007] Preferably or optionally, the detection unit includes one or more of a flow meter, a pressure transmitter and a temperature transmitter.

[0008] Preferably or optionally, a plurality of filters and / or condensers are further arranged on the gas path mounting plate.

[0009] Preferably or optionally, the hydrogen supply pipeline is sequentially connected to a hydrogen source, a first pressure reducing valve, a first filter, a first pressure transmitter, a first solenoid valve, a first flow meter, a first check valve, a second pressure transmitter, a first temperature transmitter, a pipeline filter and an intake interface;

[0010] The intake interface is connected to the hydrogen inlet of the device under test by a separable connection method.

[0011] Preferably or optionally, the nitrogen gas pipeline is sequentially connected to a nitrogen gas source, a second pressure reducing valve, a second filter, a second flowmeter, a second solenoid valve, a second one-way valve, a second pressure transmitter, a first temperature transmitter, a pipeline filter, and an intake interface.

[0012] Preferably or optionally, the tail gas discharge pipeline is sequentially connected to an outlet interface, a second temperature transmitter, a third pressure transmitter, a condensate trap, a tail gas discharge control device, and a vent port;

[0013] The outlet interface is connected to the exhaust port of the device under test by a separable connection method.

[0014] Preferably or optionally, the condensate trap is further provided with a drain pipeline.

[0015] Preferably or optionally, the tail gas discharge control device includes: a first control pipeline sequentially connected with a fourth solenoid valve and a needle valve, a second control pipeline sequentially connected with a fifth solenoid valve, and a third control pipeline sequentially connected with a back pressure valve and a sixth solenoid valve;

[0016] And the first control pipeline, the second control pipeline, and the third control pipeline are in a parallel relationship.

[0017] Preferably or optionally, the function valve, the detection unit, and the filter are connected to the gas path mounting plate in a separable or easily separable manner.

[0018] The utility model relates to a pipeline assembly for a fuel cell detection device. Compared with the prior art, it has the following beneficial effects: by integrating multiple function valves and multiple detection units on the mounting plate, users can reasonably select function valves and detection units according to different objects during debugging to meet the detection requirements of different fuel cells; at the same time, the function valves and detection units are fixed by the gas path mounting plate to regularize the pipelines and avoid the problems of redundant pipelines and difficult debugging in the gas path supply system. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the gas path assembly in the utility model.

[0020] Figure 2 is a schematic diagram of a pipeline in the utility model.

[0021] Figure 3 is a schematic structural diagram of the detection device in the utility model.

[0022] The reference numerals are: 100, mounting plate; 210, solenoid valve; 220, check valve; 230, back pressure valve; 240, needle valve; 310, flow meter; 320, pressure transmitter; 330, temperature transmitter; 400, condensate trap; 500, pressure reducing valve; 600, operation panel. Detailed implementation manners

[0023] In the following description, a large number of specific details are given to provide a more thorough understanding of the present utility model. However, it is obvious to those skilled in the art that the present utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present utility model, some well-known technical features in the art are not described.

[0024] Refer to the attached Figures 1 to 3 , a pipeline assembly for a fuel cell detection device, which is applied to a fuel cell detection device, and includes: an air circuit mounting plate 100, functional valves, a detection unit, a filter, and a condensate trap 400.

[0025] Among them, the air circuit mounting plate 100 is installed inside the fuel cell detection device. A plurality of functional valves, a plurality of detection units, and a plurality of filters are integrated on the air circuit mounting plate 100. The hydrogen supply pipeline connects the hydrogen source and the device to be tested, and a predetermined functional valve and / or detection unit and / or filter are connected in series according to the detection requirements of the fuel cell stack; the nitrogen pipeline connects the nitrogen source and the device to be tested, and a predetermined functional valve and / or detection unit and / or filter are connected in series according to the detection requirements of the fuel cell stack; the tail gas discharge pipeline connects the device to be tested and the external atmosphere, and a predetermined functional valve and / or detection unit and / or filter are connected in series according to the detection requirements of the fuel cell stack. By fixing the functional valves and the detection units through the air circuit mounting plate 100, the regularization of the pipeline is realized, and the problems of redundant pipelines and difficult debugging in the air supply system are avoided.

[0026] In a further embodiment, the functional valves include but are not limited to one or more of a solenoid valve 210, a pressure reducing valve, a check valve 220, a needle valve 240, and a back pressure valve 230. The detection unit includes but is not limited to one or more of a flow meter 310, a pressure transmitter 320, and a temperature transmitter 330. The types of the functional valves and the detection unit are selected according to specific detection requirements. However, it can be understood that the number and types of the functional valves and the detection unit both have redundancy, that is, the number of the functional valves and the detection unit is more than the number of functional elements required by the gas supply system, which is convenient for subsequent debugging and component replacement after component damage to meet the detection requirements of different fuel cells.

[0027] In a further embodiment, the functional valve, the detection unit and the filter are connected to the gas path mounting plate 100 in a separable or easily separable manner such as screwing or bonding, which facilitates the replacement of functional valves, detection units and filters of different specifications and types to meet the detection requirements of different fuel cells.

[0028] In a further embodiment, the detection result of the detection unit can be displayed on the operation panel 600, and the operating part of the functional valve can be exposed on the operation panel 600 or the functional valve can be controlled through the operation panel 600, which facilitates the user to adjust the opening of the functional valve in real time according to the detection parameters.

[0029] To facilitate the understanding of the technical solution of the pipeline assembly for the fuel cell detection device, refer to the attached Figure 2 , and a brief description of one of the pipeline connection methods is as follows:

[0030] The hydrogen supply pipeline is sequentially connected to a hydrogen source, a first pressure reducing valve, a first filter, a first pressure transmitter (PT1), a first solenoid valve, a first flowmeter, a first check valve, a second pressure transmitter (PT2), a first temperature transmitter (TT1), a pipeline filter and an air inlet interface. Among them, the air inlet interface extends from the gas path mounting plate 100 to the operation panel 600 of the detection device and is connected to the hydrogen inlet of the device to be tested in a separable connection manner, which facilitates the circuit connection during the test of the same type of fuel cell stack. In addition, the first pressure reducing valve in this embodiment is integrated on the hydrogen source, and there is no need to connect a pressure reducing valve in the part of the gas path mounting plate 100. That is to say, the pressure reducing valve is a selectable functional valve, but a certain number of pressure reducing valves still need to be reserved on the gas path mounting plate 100 or the operation panel 600 to meet the usage requirements due to the change of the hydrogen source.

[0031] The nitrogen pipeline is sequentially connected to a nitrogen source head, a second pressure reducing valve, a second filter, a second flowmeter, a second solenoid valve, a second check valve, a second pressure transmitter, a first temperature transmitter, a pipeline filter and an air inlet interface. The second flowmeter is a glass rotor flowmeter. The detection device monitors the relevant parameters of the gas path supply system operation process in real time through the detection unit. For example, when the hydrogen inlet pressure is lower than the lower limit of the set operating pressure, or the hydrogen inlet pressure is higher than the upper limit of the set operating pressure, or when an emergency shutdown is required due to other failures, the system automatically starts relevant operations such as nitrogen purging, load cutting, heating stop, and gas supply stop, and issues an audible and visual alarm. Moreover, before each start of the test and after the end of the test, it is necessary to perform nitrogen purging on the pipeline and the flow channels in the fuel cell stack in the first time to empty the residual reaction gas in the pipeline. Through the analysis of the nitrogen usage scenarios, there is no parallel situation between hydrogen supply and nitrogen supply. Therefore, in this embodiment, the nitrogen pipeline shares the pipeline of the first temperature transmitter, the pipeline filter and the air inlet interface part with the hydrogen supply pipeline.

[0032] The tail gas discharge pipeline is successively connected with an air outlet interface, a second temperature transmitter ((TT2)), a third pressure transmitter (PT3), a condensate trap 400, a tail gas discharge control device, and an exhaust port; the air outlet interface is connected to the exhaust port of the device under test in a separable connection manner. Similarly, the air outlet interface is arranged on the operation panel 600 of the detection device and extends to the gas circuit mounting plate 100, and is connected to the hydrogen inlet of the device under test in a separable connection manner, which is convenient for circuit connection during the test of the same type of fuel cell stack. The tail gas discharge pipeline can adjust the fuel cell to maintain a certain outlet pressure according to the set outlet pressure of the fuel cell, or set the pulse discharge time according to the operation state requirements of the fuel cell stack by adjusting the flow regulating valve on the outlet side. Correspondingly, the tail gas discharge control device includes: a first control pipeline successively connected with a fourth solenoid valve and a needle valve 240, a second control pipeline successively connected with a fifth solenoid valve, and a third control pipeline successively connected with a back pressure valve and a sixth solenoid valve; and the first control pipeline, the second control pipeline, and the third control pipeline are in a parallel relationship. The back pressure discharge mode is that when the pressure in the pipeline is smaller than the set pressure, no gas is discharged; when the gas pressure in the pipeline is larger than the set pressure, gas is discharged to keep the fuel cell stack at a certain outlet pressure. The pulse discharge mode is to intermittently open and close the tail gas discharge valve at a certain opening interval to discharge the tail gas in a pulsed manner; in order to make the pulsed tail gas discharge flow stable, a needle valve 240 is also added to control in the pipeline. The direct discharge mode (i.e., the direct discharge mode is used when shutting down) is to open the tail gas discharge valve and continuously discharge the tail gas.

[0033] In a further embodiment, the condensate trap 400 is further provided with a drainage pipeline composed of a third solenoid valve and a drain port. Moreover, the condensed water at the drain port can be introduced into the temperature and humidity management system of the detection device to evaporate the condensed water again, so as to increase the intake humidity of the fuel cell, thereby effectively improving the performance and stability of the fuel cell stack.

[0034] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present invention does not further describe various possible combination manners.

Claims

1. A pipeline assembly for a fuel cell testing device, characterized in that: The device comprises: a mounting plate, a plurality of functional valves and a plurality of detection units integrated on the mounting plate, a hydrogen supply pipeline connecting a hydrogen source and a device to be tested and connected in series with predetermined functional valves and / or detection units, a nitrogen pipeline connecting a nitrogen source and a device to be tested and connected in series with predetermined functional valves and / or detection units, and an exhaust gas emission pipeline connecting the device to be tested and the external atmosphere and connected in series with predetermined functional valves and / or detection units.

2. The pipeline assembly for fuel cell testing equipment according to claim 1, characterized in that: The functional valve includes one or more of a solenoid valve, a pressure reducing valve, a one-way valve, a needle valve and a back pressure valve.

3. The pipeline assembly for fuel cell testing equipment according to claim 2, characterized in that: The detection unit includes one or more of a flow meter, a pressure transmitter, and a temperature transmitter.

4. The pipeline assembly for fuel cell testing equipment according to claim 3, characterized in that: The mounting plate is also provided with a plurality of filters and / or condensers.

5. The pipeline assembly for fuel cell testing equipment according to claim 4, characterized in that: The hydrogen supply pipeline is sequentially connected to a hydrogen source, a first pressure reducing valve, a first filter, a first pressure transmitter, a first solenoid valve, a first flow meter, a first check valve, a second pressure transmitter, a first temperature transmitter, a pipeline filter and an air inlet interface; The air inlet interface is connected to the hydrogen inlet of the device to be tested in a detachable connection manner.

6. The pipeline assembly for fuel cell testing equipment according to claim 5, characterized in that: The nitrogen pipeline is sequentially connected to a nitrogen source, a second pressure reducing valve, a second filter, a second flow meter, a second solenoid valve, a second one-way valve, a second pressure transmitter, a first temperature transmitter, a pipeline filter and an air inlet interface.

7. The pipeline assembly for fuel cell testing equipment according to claim 6, characterized in that: The exhaust gas emission pipeline is sequentially connected with an outlet interface, a second temperature transmitter, a third pressure transmitter, a condenser, an exhaust gas emission control device, and an exhaust port; The air outlet interface is connected to the exhaust port of the device to be tested in a detachable connection manner.

8. The pipeline assembly for fuel cell testing equipment according to claim 7, characterized in that: The condenser is also provided with a drainage pipeline.

9. The pipeline assembly for fuel cell testing equipment according to claim 7, characterized in that: The exhaust emission control device comprises: a first control pipeline connected to a fourth solenoid valve and a needle valve in sequence, a second control pipeline connected to a fifth solenoid valve in sequence, and a third control pipeline connected to a back pressure valve and a sixth solenoid valve in sequence; Furthermore, the first control pipeline, the second control pipeline and the third control pipeline are connected in parallel.

10. The pipeline assembly for fuel cell testing equipment according to claim 1, characterized in that: The functional valve, the detection unit and the filter are connected to the mounting plate in a detachable or easily detachable manner.

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