Fuel cell system gas distribution module testing device

Abstract

The utility model provides a testing device for a gas distribution module of a fuel cell system, which relates to the technical field of fuel cells and is characterized in that an upper gas outlet of the gas distribution module is sequentially connected with a second flowmeter, a first back pressure valve and a tail exhaust device; the lower gas outlet is sequentially connected with a third flow meter, a second back pressure valve and a tail gas discharging device; a gas inlet of the gas distribution module, the intercooler, the air compressor and the air filter are connected in sequence; a first flow meter is arranged between the air compressor and the air filter; the intercooler is respectively connected with the auxiliary radiator and the auxiliary water pump; the air compressor is respectively connected with the auxiliary radiator and the auxiliary water pump; the auxiliary radiator is connected with the auxiliary water pump, and the auxiliary water tank is connected between the auxiliary radiator and the auxiliary water pump. The device can check whether the design of the gas distribution module is reasonable and meets the design requirements in the early stage, and does not need to be connected with a fuel cell stack for testing, thereby reducing the testing cost.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a test device for a gas distribution module of a fuel cell system. Background Art

[0002] A fuel cell is a power generation device with high power generation efficiency, low environmental pollution, and high specific energy. At present, fuel cell systems are widely used in the transportation field, and the main vehicle types include buses, light trucks, heavy trucks, and sanitation vehicles, etc. The fuel cell system installed on a heavy truck has a relatively high rated power, and a single fuel cell stack cannot meet the power requirements of the existing fuel cell system. Therefore, it is necessary to work in the form of integrating two or more fuel cell stacks. This working method requires precise control of the gas volume entering each fuel cell stack to ensure its balance, so as to ensure the stability and efficiency of the system. This puts high standards on the design of the gas distribution module, and its performance directly affects the working effect of the entire fuel cell system. Therefore, it is particularly important to develop a device that can accurately test and verify the design of the gas distribution module to ensure that it can meet the expected performance standards in actual applications.

[0003] At present, for the test of the fuel cell gas distribution module, it mainly depends on directly connecting to the fuel cell stack for in-vehicle testing or using a special test bench to simulate actual working conditions. These test methods aim to evaluate the performance of the gas distribution module in the actual operating environment, including key indicators such as its control accuracy of gas flow, response speed, and long-term stability. However, these test means often involve complex preparation work and need to be carried out after the fuel cell stack has been assembled, which to a certain extent limits the flexibility of the test and increases the cost. Summary of the Utility Model

[0004] In view of this, the utility model provides a test device for a gas distribution module of a fuel cell system. Through this device, it is possible to preliminarily verify whether the design of the gas distribution module is reasonable and meets the design requirements, and there is no need to connect to the fuel cell stack for testing, thereby reducing the test cost.

[0005] For this reason, the utility model adopts the following technical solutions:

[0006] The utility model provides a test device for a gas distribution module of a fuel cell system, including:

[0007] A gas distribution module; the gas distribution module includes an air inlet, an upper air outlet, and a lower air outlet;

[0008] The upper air outlet is sequentially connected to a second flowmeter, a first back pressure valve, and a tail gas discharge device through a second pipeline, and the lower air outlet is sequentially connected to a third flowmeter, a second back pressure valve, and a tail gas discharge device through a third pipeline;

[0009] The air inlet, the intercooler, the air compressor and the air filter are connected in sequence; a first flowmeter is arranged between the air compressor and the air filter; the intercooler is respectively connected to the auxiliary radiator and the auxiliary water pump; the air compressor is respectively connected to the auxiliary radiator and the auxiliary water pump; the auxiliary radiator is connected to the auxiliary water pump, and an auxiliary water tank is connected between the auxiliary radiator and the auxiliary water pump.

[0010] Further, a first pressure sensor is also arranged on the second pipeline, and a second pressure sensor is also arranged on the third pipeline.

[0011] Further, the second flowmeter, the first back pressure valve and the tail exhaust device are connected by a silica gel tube;

[0012] The third flowmeter, the second back pressure valve and the tail exhaust device are connected by a silica gel tube.

[0013] Further, the intercooler and the air compressor are connected by a rubber tube.

[0014] Further, the gas distribution module is an air inlet fuel cell stack gas distribution module, a hydrogen inlet fuel cell stack gas distribution module or a coolant inlet fuel cell stack gas distribution module.

[0015] Further, the gas distribution module is a multi-stack fuel cell gas distribution module.

[0016] Further, the number of the air outlets is 3 or more.

[0017] Advantages and positive effects of the present utility model:

[0018] The present utility model realizes the preliminary verification of the gas distribution module of the fuel cell system, does not need to connect components such as the fuel cell stack for testing, avoids the uneven air distribution into the dual fuel cell stacks caused by design errors or processing errors, etc., resulting in insufficient gas reaction inside the stack, and further causing situations such as damage to the internal plates of the stack, and saves the project development cost. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a structural schematic diagram of a fuel cell system gas distribution module test device in an embodiment of the present utility model;

[0021] Figure 2 This is a schematic structural diagram of the gas distribution module in the embodiment of the present utility model;

[0022] In the figure, 1 is the gas distribution module; 100 is the air inlet; 110 is the upper air outlet; 120 is the lower air outlet; 2 is the second flowmeter; 3 is the first back pressure valve; 4 is the tail exhaust device; 5 is the second back pressure valve; 6 is the third flowmeter; 7 is the intercooler; 8 is the air compressor; 9 is the first flowmeter; 10 is the air filter; 11 is the auxiliary water tank; 12 is the auxiliary radiator; 13 is the auxiliary water pump; 210 is the first pipeline; 220 is the second pipeline; 230 is the third pipeline. Detailed implementation manners

[0023] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0024] It should be noted that the terms "first", "second", etc. in the description and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0025] As Figure 1 shown, a fuel cell system gas distribution module test device in the embodiment of the present utility model includes: a gas distribution module 1, a second flowmeter 2, a first back pressure valve 3, a tail exhaust device 4, a second back pressure valve 5, a third flowmeter 6, an intercooler 7, an air compressor 8, a first flowmeter 9, an air filter 10, an auxiliary water tank 11, an auxiliary radiator 12 and an auxiliary water pump 13. Among them:

[0026] As Figure 2 shown, the gas distribution module 1 includes an air inlet 100 and two air outlets. The air inlet 100 and the air outlets are respectively located on both sides of the gas distribution module 1. The two air outlets include an upper air outlet 110 located above and a lower air outlet 120 located below.

[0027] The upper air outlet 110 is sequentially connected to the second flowmeter 2, the first back pressure valve 3 and the tail exhaust device 4 through the second pipeline 220. The lower air outlet 120 is sequentially connected to the third flowmeter 6, the second back pressure valve 5 and the tail exhaust device 4 through the third pipeline 230. The second flowmeter 2, the first back pressure valve 3 and the tail exhaust device 4 are connected by a silica gel tube; the third flowmeter 6, the second back pressure valve 5 and the tail exhaust device 4 are connected by a silica gel tube. In addition, a first pressure sensor PT1 is provided on the second pipeline 220, and a second pressure sensor PT2 is provided on the third pipeline 230.

[0028] The air inlet 100, the intercooler 7, the air compressor 8 and the air filter 10 are sequentially connected; a first flowmeter 9 is provided between the air compressor and the air filter; the intercooler 7 is respectively connected to the auxiliary radiator 12 and the auxiliary water pump 13; the air compressor 8 is respectively connected to the auxiliary radiator 12 and the auxiliary water pump 13. Specifically, the intercooler 7 includes four ports. The first port is the output end and is connected to the air inlet 100 through the first pipeline 210. The second port is the input end and is connected to the air compressor 8. The third port is the output end and is connected to the auxiliary radiator 12. The fourth port is the input end and is connected to the auxiliary water pump 13. The air compressor 8 includes four ports. The first port is the output end and is connected to the intercooler. The second port is the input end and is connected to the air filter 10. The third port is the output end and is connected to the auxiliary radiator 12. The fourth port is the input end and is connected to the auxiliary water pump 13; a first flowmeter 9 is provided between the air compressor 8 and the air filter 10. The intercooler 7 and the air compressor 8 are connected by a rubber tube.

[0029] The auxiliary radiator 12 is connected to the auxiliary water pump 13, and an auxiliary water tank 11 is connected between the auxiliary radiator 12 and the auxiliary water pump 13, and the water in the auxiliary radiator 12 can enter the auxiliary water tank 11.

[0030] The test principle of the above test device is as follows:

[0031] The air is filtered by the air filter 10, which is connected to the first flowmeter 9 through a pipeline. The first flowmeter 9 monitors the total air volume flow rate entering the test device. The air compressor 8 is turned on and is connected to the first flowmeter 9 through a pipeline. The starting speed of the air compressor 8 is set to 30000 rpm. The air is pressurized by the air compressor 8, and the compressed hot air is cooled by the intercooler 7, which is connected to the air compressor 8 through a rubber hose. The cooled air enters the gas distribution module 1 through the first pipeline 210. The gas is divided into two parts through the internal flow path of the gas distribution module 1. One part of the gas enters the second pipeline 220 through the upper air outlet 110, then flows through the second flowmeter 2 and the first back pressure valve 3, and finally is discharged to the atmosphere through the tail exhaust device 4. The second flowmeter 2, the first back pressure valve 3 and the tail exhaust device 4 are connected by a silica gel tube. The other part of the gas enters the third pipeline 230 through the lower air outlet 120, then flows through the third flowmeter 6 and the second back pressure valve 5, and finally is discharged to the atmosphere by the tail exhaust device 4. The third flowmeter 6, the second back pressure valve 5 and the tail exhaust device 4 are connected by a silica gel tube. According to the air flow rate requirements of different working conditions of the fuel cell system, the air volume flow rates required at N working condition points are selected, and the speed of the air compressor 8 and the opening angles of the first back pressure valve 3 and the second back pressure valve 5 are adjusted. It is necessary to ensure that the opening angles of the two back pressure valves are the same, and at the same time, it is necessary to ensure that the states of the second pipeline 220 and the third pipeline 230 are the same, such as the straight pipe section length and the number of elbows are the same. The auxiliary water pump 13 is connected to the cooling water circuit of the air compressor 8 and the cooling water circuit of the intercooler 7 through a connecting pipeline, and exchanges heat and cools the air compressor 8 and the intercooler 7 through the cooling water. The auxiliary radiator 12 exchanges the temperature of the cooling water with the atmospheric environment, so as to ensure that the temperature of the auxiliary cooling water meets the cooling requirements of the air compressor 8 and the intercooler 7. A certain volume of cooling water is filled in the auxiliary water tank 11, which is connected to the system through a silica gel tube, and plays a role in storing and compensating the cooling water of the auxiliary cooling system.

[0032] After the test device of the gas distribution module of the fuel cell system runs stably, the volume flow rate values monitored by the second flowmeter 2 and the third flowmeter 6 at N working condition points are recorded respectively, and the pressure values at the outlet are recorded at the same time. Calculate whether the volume flow rate deviation values of the upper air outlet 110 and the lower air outlet 120 at different working condition points meet the design requirements.

[0033] In another embodiment, the above test device for the gas distribution module of the air entering the fuel cell stack can be replaced by a test device for the gas distribution module of hydrogen entering the fuel cell stack or a test device for the coolant entering the fuel cell stack gas distribution structure. At the same time, it can be designed as a test device for the gas distribution module of multiple fuel cell stacks, and the number of air outlets can be 3 or more.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A fuel cell system gas distribution module testing device, characterized in that: include: A gas distribution module (1); the gas distribution module (1) comprises a gas inlet (100), an upper gas outlet (110) and a lower gas outlet (120); The upper gas outlet (110) is connected in sequence to the second flow meter (2), the first back pressure valve (3) and the tail discharge device (4) via the second pipeline (220), and the lower gas outlet (120) is connected in sequence to the third flow meter (6), the second back pressure valve (5) and the tail discharge device (4) via the third pipeline (230); The air inlet (100), the intercooler (7), the air compressor (8) and the air filter (10) are connected in sequence; a first flow meter (9) is provided between the air compressor (8) and the air filter (10); the intercooler (7) is respectively connected to the auxiliary radiator (12) and the auxiliary water pump (13); the air compressor (8) is respectively connected to the auxiliary radiator (12) and the auxiliary water pump (13); the auxiliary radiator (12) is connected to the auxiliary water pump (13); and an auxiliary water tank (11) is connected between the auxiliary radiator (12) and the auxiliary water pump (13).

2. A fuel cell system gas distribution module testing device according to claim 1, characterized in that: The second pipeline (220) is also provided with a first pressure sensor, and the third pipeline (230) is also provided with a second pressure sensor.

3. A fuel cell system gas distribution module testing device according to claim 1, characterized in that: The second flow meter (2), the first back pressure valve (3) and the tail discharge device (4) are connected via a silicone tube; The third flow meter (6), the second back pressure valve (5) and the tail discharge device (4) are connected via a silicone tube.

4. A fuel cell system gas distribution module testing device according to claim 1, characterized in that: The intercooler (7) and the air compressor (8) are connected via a rubber hose.

5. A fuel cell system gas distribution module testing device according to claim 1, characterized in that: The gas distribution module (1) is an air-into-fuel-cell-stack gas distribution module, a hydrogen-into-fuel-cell-stack gas distribution module, or a coolant-into-fuel-cell-stack gas distribution module.

6. A fuel cell system gas distribution module testing device according to claim 1, characterized in that: The gas distribution module (1) is a multi-stack fuel cell gas distribution module.

7. A fuel cell system gas distribution module testing device according to claim 6, characterized in that: The number of air outlets is multiple.

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