CN221150087U

CN221150087U - Test system

Info

Publication number: CN221150087U
Application number: CN202322593683.3U
Authority: CN
Inventors: 肖家定; 郐金业; 于士博; 莫松; 苏汉新
Original assignee: Guangzhou Automobile Group Co Ltd
Current assignee: Guangzhou Automobile Group Co Ltd
Priority date: 2023-09-21
Filing date: 2023-09-21
Publication date: 2024-06-14
Anticipated expiration: 2033-09-21

Abstract

The application relates in particular to a test system for a fuel cell, the test system comprising: the electric pile module comprises an input port and an output port, and the output port is communicated with the inlet of the first gas-liquid separator; the hydrogen supply module is communicated with an input port in the pile module, a first outlet of the first gas-liquid separator is communicated with the hydrogen supply module through a circulating pipeline, and a first electromagnetic valve is arranged on the circulating pipeline; the testing module comprises a gas-liquid separation unit and a gas testing unit, the gas-liquid separation unit is communicated with a second outlet of the first gas-liquid separator through a liquid discharge pipeline, a drain valve is arranged on the liquid discharge pipeline, the gas testing unit is communicated with a third outlet of the first gas-liquid separator through a hydrogen discharge pipeline, a hydrogen discharge valve is arranged on the hydrogen discharge pipeline, and the gas testing unit is also communicated with the gas-liquid separation unit. The scheme can accurately obtain the separation efficiency of the first gas-liquid separator and the water content in the hydrogen supply module.

Description

Test system

Technical Field

The application belongs to the technical field of fuel cells, and particularly relates to a testing system.

Background

A hydrogen fuel cell is a power generation device using hydrogen and oxygen in air as fuel, and is widely used in vehicles. The supply system of the hydrogen fuel cell is classified into a hydrogen system and an air system. At present, a hydrogen circulation system is generally adopted in the fuel cell, and unreacted hydrogen at the anode of the fuel cell is recycled through a hydrogen circulation pump or an ejector and the like. Before the unreacted hydrogen at the anode of the fuel cell is introduced into the hydrogen circulation pump, the liquid contained in the hydrogen is required to be separated from the hydrogen by the gas-liquid separator, so that the performance and the normal operation of the fuel cell are directly affected by the gas-liquid separation effect of the gas-liquid separator.

However, the existing gas-liquid separators have no unified performance evaluation index and a better testing method, and the quality of the gas-liquid separators is difficult to judge, so that the water content entering the anode of the fuel cell is difficult to determine.

Disclosure of utility model

The application aims to provide a test system which can accurately judge whether a gas-liquid separator is good or not and determine the water content entering a fuel cell anode stack.

The present application provides a test system applied to a fuel cell, comprising:

the electric pile module comprises an input port and an output port, and the output port is communicated with the inlet of the first gas-liquid separator;

The hydrogen supply module is communicated with the input port in the galvanic pile module, the first outlet of the first gas-liquid separator is communicated with the hydrogen supply module through a circulating pipeline, and a first electromagnetic valve is arranged on the circulating pipeline;

The testing module comprises a gas-liquid separation unit and a gas testing unit, wherein the gas-liquid separation unit is communicated with a second outlet of the first gas-liquid separator through a liquid discharge pipeline, a drain valve is arranged on the liquid discharge pipeline, the gas testing unit is communicated with a third outlet of the first gas-liquid separator through a hydrogen discharge pipeline, a hydrogen discharge valve is arranged on the hydrogen discharge pipeline, and the gas testing unit is communicated with the gas-liquid separation unit.

In an exemplary embodiment of the present application, the gas-liquid separation unit includes:

The inlet of the second gas-liquid separator is communicated with the second outlet of the first gas-liquid separator through the liquid discharge pipeline, the second gas-liquid separator comprises a hydrogen outlet and a liquid outlet, and the hydrogen outlet of the second gas-liquid separator is communicated with the gas testing unit;

And the liquid collector is communicated with the liquid outlet of the second gas-liquid separator through a liquid delivery pipeline.

In an exemplary embodiment of the present application, the gas-liquid separation unit further includes a liquid level sensor capable of detecting a level of the liquid in the second gas-liquid separator, and a weight measuring member provided at one side of the liquid collector, the weight measuring member being capable of measuring a weight of the liquid collector.

In an exemplary embodiment of the present application, the gas test unit includes:

the first confluence device is communicated with a third outlet of the first gas-liquid separator through the hydrogen discharge pipeline, and is communicated with a hydrogen outlet of the second gas-liquid separator;

And the inlet of the gas flowmeter is communicated with the outlet of the first confluence device, and the gas flowmeter can detect the gas flow in the first confluence device.

In an exemplary embodiment of the application, the gas test unit further comprises a dew point meter provided at the outlet of the gas flow meter, the dew point meter being operable to detect the dew point temperature of the gas.

In an exemplary embodiment of the application, the test module further comprises a controller electrically connected to the first solenoid valve, the weight, the gas flow meter and the dew point meter, respectively.

In an exemplary embodiment of the present application, a second electromagnetic valve is disposed on the infusion tube, and the second electromagnetic valve and the liquid level sensor are both electrically connected with the controller, and the controller can control the opening and closing of the second electromagnetic valve according to the liquid level signal of the liquid level sensor.

In one exemplary embodiment of the present application, the hydrogen supply module includes a hydrogen circulation pump, a hydrogen supply source, and a second confluence device, an outlet of the hydrogen supply source is in communication with a first inlet of the second confluence device, a first outlet of the first gas-liquid separator is in communication with the hydrogen circulation pump through the circulation pipe, and the hydrogen circulation pump is in communication with a second inlet of the second confluence device.

In an exemplary embodiment of the present application, the first gas-liquid separator, the second gas-liquid separator, the liquid collector, the weight measuring member, the first confluence member, the gas flow meter, the dew point meter, the circulation pipe, the liquid discharge pipe, the hydrogen discharge pipe, the liquid delivery pipe, the hydrogen circulation pump, the hydrogen supply source, and the second confluence member are all wrapped with a heat insulating member or a heating member.

In an exemplary embodiment of the application, the first gas-liquid separator and the second gas-liquid separator each comprise a baffle structure.

The scheme of the application has the following beneficial effects:

The application provides a test system; under the condition that a first electromagnetic valve between the first gas-liquid separator and the hydrogen supply module is opened, measuring the water content M1 passing through the hydrogen discharge valve and the water discharge valve, and then under the same condition, closing the first electromagnetic valve, and measuring the water content M2 passing through the hydrogen discharge valve and the water discharge valve; because the first electromagnetic valve is communicated with the first gas-liquid separator and the hydrogen supply module, when the first electromagnetic valve is opened, part of hydrogen and part of water in the gas-liquid mixture discharged from the electric pile module flows back to the electric pile module through the hydrogen supply module, and the measured water content M1 is the water content which does not contain the water re-entering the electric pile module; when the first electromagnetic valve is closed, hydrogen and water in the electric pile module completely flow into the test module through the first gas-liquid separator, and the measured water content M2 is the total water content output by the electric pile module. The water content M1 and the water content M2 are measured, namely the water content M1 in the reentry pile module can be accurately obtained, namely the water content M circulation in the reentry pile module can be obtained by subtracting the water content M1 from the water content M2, and the separation efficiency of the first gas-liquid separator can be accurately obtained by the water content M1 and the water content M2.

Other features and advantages of the application will be apparent from the following detailed description, or may be learned by the practice of the application.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application as claimed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. It is evident that the drawings in the following description are only some embodiments of the present application and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a block diagram showing a test system according to one or two embodiments of the present application;

fig. 2 is a block diagram showing the structure of a gas-liquid separation unit according to the first or second embodiment of the present application;

FIG. 3 is a block diagram showing a gas test unit according to one or two embodiments of the present application;

fig. 4 is a schematic flow chart of a test method according to a second embodiment of the present application.

Reference numerals illustrate:

1. A test system;

10. a galvanic pile module; 11. an input port; 12. an output port;

20. A first gas-liquid separator;

30. a hydrogen supply module; 31. a circulation pipe; 32. a first electromagnetic valve; 33. a hydrogen supply source; 34. a hydrogen circulation pump; 35. a second combiner;

40. A test module; 41. a gas-liquid separation unit; 410. a liquid discharge pipe; 411. a drain valve; 412. a second gas-liquid separator; 413. a liquid collector; 414. an infusion pipeline; 415. a second electromagnetic valve; 416. a liquid level sensor; 417. a weight measuring member; 42. a gas test unit; 420. a hydrogen discharge pipe; 421. a hydrogen discharge valve; 422. a first combiner; 423. a gas flow meter; 424. a dew point meter; 43. and a controller.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art.

In the present disclosure, the terms "first," "second," and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying a number of technical features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly, and may be fixedly attached, detachably attached, or integrally formed, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the application. One skilled in the relevant art will recognize, however, that the application may be practiced without one or more of the specific details, or with other methods, components, devices, steps, etc. In other instances, well-known methods, devices, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the application.

Example 1

The embodiment of the application provides a test system 1 which is applied to a fuel cell, for example, a hydrogen fuel cell. Referring to fig. 1 to 3, the test system 1 includes:

A stack module 10, the stack module 10 comprising an input port 11, an output port 12 and an anode portion for simulating a fuel cell stack anode, the input port 11 communicating with the anode portion for inputting fresh hydrogen or re-stacking hydrogen to the anode portion; the output port 12 is communicated with an anode part, and the anode part can output a gas-liquid mixture to the output port 12, and input the gas-liquid mixture to the inlet of the first gas-liquid separator 20, namely, the output port 12 is communicated with the inlet of the first gas-liquid separator 20 so as to perform gas-liquid separation on the gas-liquid mixture;

The hydrogen supply module 30 is used for simulating hydrogen supply and hydrogen circulation of the anode of the fuel cell stack, the hydrogen supply module 30 is communicated with the input port 11 in the stack module 10, the first outlet of the first gas-liquid separator 20 is communicated with the hydrogen supply module 30 through a circulation pipeline 31, a first electromagnetic valve 32 is arranged on the circulation pipeline 31, and the hydrogen supply module 30 generates dry-wet mixed hydrogen and inputs the dry-wet mixed hydrogen into the anode part of the stack module 10;

The testing module 40, the testing module 40 includes the gas-liquid separation unit 41 and gas test unit 42, the gas-liquid separation unit 41 communicates with second outlet of the first gas-liquid separator 20 through the drain pipe 410, there is a drain valve 411 on the drain pipe 410, control the on-off of the drain pipe 410 through the drain valve 411; the gas testing unit 42 is communicated with the third outlet of the first gas-liquid separator 20 through a hydrogen discharge pipeline 420, a hydrogen discharge valve 421 is arranged on the hydrogen discharge pipeline 420, the hydrogen discharge valve 421 controls the on-off of the hydrogen discharge pipeline 420, and the gas testing unit 42 is also communicated with the gas-liquid separation unit 41. The test module 40 is used to obtain the moisture content of the flow into the test module 40.

According to the scheme of the application, the water content M1 in the test module 40 when the first electromagnetic valve 32 is opened and the water content M2 in the test module 40 when the first electromagnetic valve 32 is closed are respectively measured by the test module 40, so that the water content M circulation = M2-M1 of the gas-liquid mixture at the anode outlet in the fuel cell stack, which participates in the circulation in the hydrogen supply module 30, can be obtained, namely, the water content in the fuel cell anode stack is re-entered after passing through the first gas-liquid separator 20. Moreover, the separation efficiency η, η=m1/M2 of the first gas-liquid separator 20 can be obtained, the separation efficiency of the first gas-liquid separator 20 can be accurately calculated, the quality of the first gas-liquid separator 20 can be accurately judged, and a drainage strategy more conforming to the actual situation can be formulated according to the separation efficiency.

The system of the present application will be described in detail as follows:

The anode part of the pile module 10 is a pile anode of a fuel cell in practical use, which can release gaseous hydrogen, gaseous water and liquid water with certain pressure and temperature, and input the gaseous hydrogen, the gaseous water and the liquid water into the first gas-liquid separator 20 through the output port 12, and the first gas-liquid separator 20 separates the gaseous hydrogen, the gaseous water and the liquid water.

Referring to fig. 1, the hydrogen supply module 30 includes a hydrogen supply source 33, a hydrogen circulation pump 34 and a second combiner 35, the hydrogen supply source 33 is a high pressure hydrogen source, which is communicated with the second combiner 35 through a hydrogen supply pipeline, the hydrogen circulation pump 34 is communicated with the first gas-liquid separator 20 through a circulation pipeline 31, a first electromagnetic valve 32 is arranged on the circulation pipeline 31, the first electromagnetic valve 32 can control the on-off of the circulation pipeline 31, the hydrogen circulation pump 34 is communicated with the second combiner 35 through a hydrogen supply branch, and an outlet of the second combiner 35 is communicated with the input port 11 of the galvanic pile module 10, namely, an outlet of the second combiner 35 is communicated with the anode part; that is, the hydrogen gas of the hydrogen supply source 33 and the hydrogen gas in the first gas-liquid separator 20 are collected together and then introduced into the anode portion through the second flow combiner 35.

It can be understood that, after the hydrogen gas in the hydrogen circulation pump 34 and the hydrogen supply source 33 reach the same air pressure and temperature, the hydrogen gas in the hydrogen circulation pump 34 and the hydrogen supply source 33 can be introduced into the anode portion through the second combiner 35, so that the difference between the air pressure and the temperature is avoided, and the normal working state of the fuel cell is influenced.

Referring to fig. 1 and 2, the gas-liquid separation unit 41 includes a second gas-liquid separator 412 and a liquid collector 413, wherein an inlet of the second gas-liquid separator 412 is communicated with a second outlet of the first gas-liquid separator 20 through a liquid discharge pipe 410, and a drain valve 411 is arranged on the liquid discharge pipe 410 and can control on-off of the liquid discharge pipe 410; when the drain valve 411 is opened, it may be used to receive liquid water separated in the first gas-liquid separator 20.

It will be appreciated that, since the first gas-liquid separator 20 may have incomplete separation, and the liquid water entering the second gas-liquid separator 412 is mixed with gaseous hydrogen, the liquid water flowing into the first gas-liquid separator 20 through the liquid discharge pipe 410 is separated by the second gas-liquid separator 412.

Wherein the second gas-liquid separator 412 includes a hydrogen outlet and a liquid outlet, and the gaseous hydrogen flows out of the hydrogen outlet and into the gas testing unit 42 after being separated by the second gas-liquid separator 412; the liquid water flows out through the liquid outlet, and is transferred to the liquid collector 413 for storage through the infusion pipeline 414, and the infusion pipeline 414 is provided with a second electromagnetic valve 415 which can be controlled to be opened and closed according to a liquid level sensor 416 described below, so as to control the on-off of the infusion pipeline 414.

Further, referring to fig. 1 and 2, the gas-liquid separation unit 41 further includes a liquid level sensor 416 and a weight 417, wherein the liquid level sensor 416 is disposed on the second gas-liquid separator 412 and is used for detecting a change of the liquid level in the second gas-liquid separator 412. After the liquid level detected by the liquid level sensor 416 reaches the set upper limit value, the second electromagnetic valve 415 is opened, and the liquid in the second gas-liquid separator 412 is discharged into the liquid collector 413 through the liquid delivery pipeline 414; after the liquid level detected by the liquid level sensor 416 reaches the set lower limit value, the second electromagnetic valve 415 is closed to prevent the hydrogen gas in the second gas-liquid separator 412 from flowing into the liquid collector 413. The weight measuring member 417 is disposed below the liquid collector 413 and is used for measuring the weight of the liquid collector 413, and it should be understood that when the weight of the liquid in the liquid collector 413 is obtained, the weight of the liquid in the liquid collector 413 needs to be obtained in advance, and then the weight of the liquid in the liquid collector 413 is obtained by subtracting the weight of the liquid collector 413 from the weight obtained by the weight measuring member 417.

The set upper limit value does not affect the water-gas separation space in the second gas-liquid separator 412; the set lower limit value is not lower than the liquid outlet of the second gas-liquid separator 412, avoiding gas discharge.

In order to avoid the presence of gas in the liquid collector 413, a vent line is provided above the liquid collector 413, so that the gas in the liquid collector 413 can be discharged, and the weight of the liquid measured by the weight measuring part 417 is not affected.

Further, referring to fig. 1 and 3, the gas testing unit 42 includes a first combiner 422 and a gas flowmeter 423, the first combiner 422 is connected to the third outlet of the first gas-liquid separator 20 through a hydrogen discharge pipe 420, a hydrogen discharge valve 421 is disposed on the hydrogen discharge pipe 420, and the hydrogen discharge valve 421 controls the on-off state of the hydrogen discharge pipe 420. The first combiner 422 is also in communication with the hydrogen outlet of the second gas-liquid separator 412 via a hydrogen line to vent the hydrogen in the second gas-liquid separator 412 into the first combiner 422. That is, the first combiner 422 can receive the hydrogen in the first gas-liquid separator 20 and the second gas-liquid separator 412, so that the hydrogen in the two gas-liquid separators is mixed in the first combiner 422, and the first combiner 422 can introduce the hydrogen in the first and second gas-liquid separators into the gas flowmeter 423 after the hydrogen in the first and second gas-liquid separators is mixed to be stable, so as to calculate the flow rate of the hydrogen.

Further, referring to fig. 1 and 3, the gas testing unit 42 further includes a dew point meter 424, wherein the dew point meter 424 is disposed at an outlet of the gas flow meter 423, and the dew point meter 424 is capable of detecting a dew point temperature of the gas and obtaining a moisture volume fraction at the dew point temperature according to a comparison table of the dew point temperature and the moisture content.

In addition, the hydrogen passing through the gas flow meter 423 is discharged into the hydrogen collecting box for recycling.

It should be noted that, in the embodiment of the present application, referring to fig. 1, the test module 40 further includes a controller 43, and the controller 43 is electrically connected to the first solenoid valve 32, the second solenoid valve 415, the liquid level sensor 416, the gas flow meter 423 and the dew point meter 424, respectively.

Wherein the controller 43 can control whether or not the hydrogen gas after the gas-liquid separation is circulated into the anode portion via the hydrogen circulation pump 34 by controlling the opening and closing of the first electromagnetic valve 32; when the first electromagnetic valve 32 is opened, the hydrogen gas separated by the gas-liquid mixture through the first gas-liquid separator 20 is circulated and flows into the anode part through the hydrogen circulation pump 34, namely, the hydrogen gas discharged from the anode part is recycled, and the hydrogen gas is reentered into the stack; when the first solenoid valve 32 is closed, after the gas-liquid mixture discharged from the anode portion is gas-liquid separated by the first gas-liquid separator 20, water and gas all flow into the test module 40.

In addition, the controller 43 controls the opening and closing of the second electromagnetic valve 415 through the liquid level information transmitted by the liquid level sensor 416, and after the liquid level detected by the liquid level sensor 416 reaches the set upper limit value, opens the second electromagnetic valve 415 to discharge the liquid in the second gas-liquid separator 412 into the liquid collector 413 through the infusion line 414; after the liquid level detected by the liquid level sensor 416 reaches the set lower limit value, the second electromagnetic valve 415 is closed to prevent the hydrogen gas in the second gas-liquid separator 412 from flowing into the liquid collector 413.

Dew point meter 424 measures the gas dew point temperature from which controller 43 can obtain the moisture volume fraction at the dew point temperature.

It should be noted that the controller 43 may obtain data of current, voltage, power, average voltage on a chip, minimum voltage on a chip, maximum voltage on a chip, etc. in the pile module 10.

In the embodiment of the present application, the first gas-liquid separator 20 and the second gas-liquid separator 412 each include a baffle structure, that is, the first gas-liquid separator 20 and the second gas-liquid separator 412 are both baffle-type separation structures.

In the embodiment of the present application, the pipeline of the galvanic pile module 10 communicating with the first gas-liquid separator 20, the pipeline of the first gas-liquid separator 20 communicating with the second gas-liquid separator 412, the pipeline of the first gas-liquid separator 20 communicating with the first confluence device 422, the second gas-liquid separator 412, the first confluence device 422, the pipeline of the second gas-liquid separator 412 communicating with the liquid collector 413, the pipeline of the first confluence device 422 communicating with the gas flow meter 423, the pipeline output by the gas flow meter 423, the dew point instrument 424, the pipeline of the first gas-liquid separator 20 communicating with the hydrogen circulation pump 34, the hydrogen circulation pump 34 and the pipeline of the hydrogen circulation pump 34 communicating with the second confluence device 35 are all wrapped with heat preservation pieces or heating pieces, so as to prevent the gas temperature from decreasing with the flow, thereby ensuring the accuracy of the test.

It should be noted that the heat insulating member may be heat insulating cotton, and the heating member may be a hot water/hot air pipeline, which provides heating for the pipeline.

In order to test the separation effect of the first gas-liquid separator 20, the present application can be specifically tested in the following process:

The first solenoid valve 32 is opened, and the water content M1 flowing into the gas-liquid separation unit 41 and the gas test unit 42 is obtained under the preset stack operating condition and for the preset period of time.

It will be appreciated that, since the first solenoid valve 32 between the first gas-liquid separator 20 and the hydrogen circulation pump 34 is opened, after the gas-liquid mixture flowing out of the anode portion passes through the first gas-liquid separator 20, the drain valve 411 and the hydrogen discharge valve 421 are opened and closed at a predetermined frequency, a part of hydrogen and gaseous water may enter the second header 35 along with the hydrogen circulation pump 34, and another part may enter the gas test unit 42 and the gas-liquid separation unit 41 through the hydrogen discharge valve 421 and the drain valve 411, respectively. I.e. the water content M1 obtained is smaller than the water content in the off-stack gas-liquid mixture in the anode portion.

Wherein opening and closing the drain valve 411 and the hydrogen discharge valve 421 at a preset frequency means: the hydrogen discharge valve 421 opens and closes the mutual interval for a certain period of time; the drain valve 411 is opened and closed at intervals for a certain period of time. For example: the hydrogen discharge valve 421 and the drain valve 411 are in an open state for a preset period T1; the hydrogen discharge valve 421 and the drain valve 411 are in a closed state for a preset period T2. The frequencies of the water drain valve 411 and the hydrogen drain valve 421 may be the same or different.

The first electromagnetic valve 32 between the first gas-liquid separator 20 and the hydrogen circulation pump 34 is closed, and under the same preset stack operation condition, the parameters of the stack module 10 are ensured to be consistent with the parameters of the stack module 10 when the first electromagnetic valve 32 is opened, so that the state of the stack module 10 is consistent with the state of the stack module 10 when the first electromagnetic valve 32 is opened, and the water content M2 flowing into the gas-liquid separation unit 41 and the gas test unit 42 is obtained within the same preset time period.

That is, the parameters and states of the stack module 10 in this step are the same as those of the stack module 10 in the previous step, so that the test accuracy is ensured. The parameters of the pile module 10 include an inlet pressure, a gas metering ratio, and the like in the pile module 10. That is, it is necessary to keep the state of the cell stack module 10 in this step identical to that of the cell stack module 10 in the previous step, to ensure that the water content in the gas-liquid mixture output from the output port 12 of the cell stack module 10 is the same, and to further ensure the accuracy of measurement.

In addition, when the first solenoid valve 32 is closed, the drain valve 411 and the hydrogen discharge valve 421 are opened and closed at the same preset frequency as described above, and the drain valve 411 and the hydrogen discharge valve 421 are opened and closed at the preset frequency as described above, and will not be described in detail here.

It should be understood that the above-mentioned processes of measuring the water content M1 and the water content M2 are independent and do not interfere with each other, i.e. the water content M1 and the water content M2 measured by the two processes are not sequential, but only the environment, the working state, the working parameters and the state of the galvanic pile module 10 are the same.

Further, since the first electromagnetic valve 32 between the first gas-liquid separator 20 and the hydrogen circulation pump 34 is closed, the gas-liquid mixture flowing out of the stack module 10 after passing through the first gas-liquid separator 20 completely enters the gas test unit 42 and the gas-liquid separation unit 41 through the hydrogen discharge valve 421 and the water discharge valve 411, respectively. I.e. the water content M2 obtained is equal to the water content in the gas-liquid mixture output at the output 12 of the galvanic pile module 10.

Wherein the means for obtaining the water content M1 and the water content M2 comprise: the weight M _{Collecting and recovering} of the liquid collector 413, the flow W of the gas flowmeter 423, the gas dew point temperature Td of the dew point meter 424 and the moisture volume fraction h% at the dew point temperature are measured for a preset period of time, and the water content is calculatedTo obtain a water content M1 and a water content M2.

After obtaining the water content M1 and the water content M2, it is possible to know the water content M _{Circulation type},M_{Circulation type} =m2-M1 in the hydrogen gas that is re-flowed into the anode portion by the hydrogen circulation pump 34; and the separation efficiency η, η=m1/M2 of the first gas-liquid separator 20 may be calculated.

The present application can completely and accurately obtain the separation efficiency of the first gas-liquid separator 20 and the water content of the re-flowing into the anode portion through the hydrogen circulation pump 34 by this test system 1; the quantitative test is carried out on the anode water quantity and the forward direction on the basis of not changing the structure of the fuel cell system, the separation efficiency of the first gas-liquid separator 20 and the actual water resistance of the electric pile are tested under the actual use scene, and the test result can be used for assisting in making a drainage strategy which is more in line with the actual situation.

Example two

The second embodiment of the present application provides a testing method based on the testing system 1 in the first embodiment, as shown in fig. 1 to 4, the testing method includes the following steps:

In step S100, the first solenoid valve 32 is opened, and the water content M1 flowing into the gas-liquid separation unit 41 and the gas test unit 42 is obtained under a preset stack operation condition and for a preset period of time.

Since the first solenoid valve 32 between the first gas-liquid separator 20 and the hydrogen circulation pump 34 is opened, after the gas-liquid mixture flowing out of the anode portion passes through the first gas-liquid separator 20, the drain valve 411 and the hydrogen discharge valve 421 are opened and closed at a preset frequency, a part of hydrogen and gaseous water may enter the second header 35 along with the hydrogen circulation pump 34, and another part may enter the gas test unit 42 and the gas-liquid separation unit 41 through the hydrogen discharge valve 421 and the drain valve 411, respectively. I.e. the water content M1 obtained is smaller than the water content in the off-stack gas-liquid mixture in the anode portion.

Step S200, closing the first solenoid valve 32, and under the same preset stack operation condition, ensuring that the parameters of the stack module 10 are consistent with the parameters of the stack module 10 when the first solenoid valve 32 is opened, keeping the state of the stack module 10 consistent with the state of the stack module 10 when the first solenoid valve 32 is opened, and obtaining the water content M2 flowing into the gas-liquid separation unit 41 and the gas test unit 42 in the same preset time period.

That is, the parameters and states of the stack module 10 in step S200 are the same as those of the stack module 10 in step S100, so that the test accuracy is ensured.

The parameters of the pile module 10 include an inlet pressure, a gas metering ratio, and the like in the pile module 10. That is, it is necessary to maintain the state of the stack module 10 in this step in agreement with the state of the stack module 10 in the previous step, to ensure that the water content output from the output port 12 of the stack module 10 is the same, thereby ensuring the accuracy of measurement.

It will be appreciated that, since the first electromagnetic valve 32 between the first gas-liquid separator 20 and the hydrogen circulation pump 34 is closed, the gas-liquid mixture flowing out of the electric pile module 10 passes through the first gas-liquid separator 20 and then completely enters the gas test unit 42 and the gas-liquid separation unit 41 through the hydrogen discharge valve 421 and the water discharge valve 411, respectively. I.e. the water content M2 obtained is equal to the water content of the gas-liquid mixture output by the output 12 of the galvanic pile module 10.

In addition, the processes of the measured water content M1 and the measured water content M2 are independent and do not interfere with each other, namely the measured water content M1 and the measured water content M2 are not in sequence, and only the environment, the working state, the working parameters and the anode state of the electric pile are the same.

The weight M _{Collecting and recovering} of the liquid collector 413, the flow W of the gas flowmeter 423, the gas dew point temperature Td of the dew point meter 424 and the moisture volume fraction h% at the dew point temperature are measured for a preset period of time, and the water content is calculated

That is, the water content M1 and the water content M2 are obtained by: the weight M _{Collecting and recovering} of the liquid collector 413, the flow W of the gas flowmeter 423, the gas dew point temperature Td of the dew point meter 424 and the moisture volume fraction h% at the dew point temperature are measured for a preset period of time, and the water content is calculatedTo obtain a water content M1 and a water content M2.

After the water content M1 and the water content M2 are obtained, the water content M _{Circulation type} in the hydrogen gas flowing into the anode portion through the hydrogen circulation pump 34 and the separation efficiency of the first gas-liquid separator 20 can be known.

Step S300, calculating the water content M _{Circulation type},M_{Circulation type} =m2-M1 entering the pile module 10 through the hydrogen supply module 30; the separation efficiency η, η=m1/M2 of the first gas-liquid separator 20 is calculated.

The present application can completely and accurately obtain the separation efficiency of the first gas-liquid separator 20 and the water content re-flowed into the anode portion by the hydrogen circulation pump 34 by this test system 1 and test method; the quantitative test is carried out on the anode water quantity and the forward direction on the basis of not changing the structure of the fuel cell system, the separation efficiency of the first gas-liquid separator 20 and the actual water resistance of the electric pile are tested under the actual use scene, and the test result can be used for assisting in making a drainage strategy which is more in line with the actual situation.

In the description of the present specification, reference to the terms "some embodiments," "exemplary," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present application have been shown and described, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made in the above embodiments by those skilled in the art within the scope of the application, which is therefore intended to be covered by the appended claims and their equivalents.

Claims

1. A test system for use with a fuel cell, the test system comprising:

2. The test system of claim 1, wherein the gas-liquid separation unit comprises:

3. The test system of claim 2, wherein the gas-liquid separation unit further comprises a liquid level sensor capable of detecting a level of the liquid in the second gas-liquid separator, and a weight member provided at one side of the liquid collector, the weight member capable of measuring a weight of the liquid collector.

4. A test system according to claim 3, wherein the gas test unit comprises:

The inlet of the gas flowmeter is communicated with the outlet of the first confluence device, and the gas flowmeter is used for detecting the gas flow in the first confluence device.

5. The test system of claim 4, wherein the gas test unit further comprises a dew point meter disposed at an outlet of the gas flow meter, the dew point meter configured to detect a dew point temperature of the gas.

6. The test system of claim 5, wherein the test module further comprises a controller electrically connected to the first solenoid valve, the weight, the gas flow meter, and the dew point meter, respectively.

7. The test system of claim 6, wherein a second electromagnetic valve is arranged on the infusion tube, the second electromagnetic valve and the liquid level sensor are electrically connected with the controller, and the controller can control the opening and closing of the second electromagnetic valve according to a liquid level signal of the liquid level sensor.

8. The test system of claim 5, wherein the hydrogen supply module comprises a hydrogen circulation pump, a hydrogen supply source, and a second flow combiner, an outlet of the hydrogen supply source being in communication with a first inlet of the second flow combiner, a first outlet of the first gas-liquid separator being in communication with the hydrogen circulation pump through the circulation conduit, the hydrogen circulation pump being in communication with a second inlet of the second flow combiner.

9. The test system of claim 8, wherein the outsides of the first gas-liquid separator, the second gas-liquid separator, the liquid collector, the weight measuring member, the first confluence member, the gas flow meter, the dew point meter, the circulation pipe, the liquid discharge pipe, the hydrogen discharge pipe, the infusion pipe, the hydrogen circulation pump, the hydrogen supply source, and the second confluence member are all wrapped with a heat insulating member or a heating member.

10. The test system of any one of claims 2 to 9, wherein the first gas-liquid separator and the second gas-liquid separator each comprise a baffle structure.