CN114838937A - Multifunctional monitoring system for fuel cell engine and control method thereof - Google Patents
Multifunctional monitoring system for fuel cell engine and control method thereof Download PDFInfo
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Abstract
The invention relates to the technical field of fuel cells, in particular to a multifunctional monitoring system for a fuel cell engine and a control method thereof; the nitrogen module and the air module are arranged, so that the purging, air tightness test and blow-by test of the tested fuel cell engine can be completed, and the single test capability of most of the conventional subsystem test platforms is improved; the technical method provided by the invention has high flexibility and versatility for testing, developing and calibrating the fuel cell engine, and can be carried out at any time when external conditions allow, such as: air tightness test, blow-by test, hydrogen and oxygen concentration tolerance and other fuel cell engine performance tests.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a multifunctional monitoring system for a fuel cell engine and a control method thereof.
Background
The fuel cell engine is a power generation device in which a plurality of subsystems are combined with each other, and is composed of a hydrogen system, an air system, and a cooling system. The technology of the current hydrogen fuel cell is rapidly developed, the fuel cell engine for the vehicle is also in a commercialization stage, and the research and development capability requirement of the fuel cell engine is gradually increased. In the system research and development process, a reasonable verification method is used, and the method has important significance for obtaining the influence parameters of each subsystem and the high-precision data of the overall performance of the engine by using the fuel cell engine.
Therefore, a multifunctional fuel cell engine test bench is needed, which can meet the operation requirements and data acquisition of different subsystems of a fuel cell integrated system, and can effectively perform performance verification or calibration work on each device of the fuel cell engine.
The existing test system technical scheme mainly has two types. The first is as follows: the CN105807233 hydrogen system test platform (refer to fig. 1) and the CN211427169 fuel cell thermal management test system (refer to fig. 2) are mainly directed to the test of a certain subsystem of a fuel cell system, and the application scenario is limited to the initial development or calibration stage of a single subsystem of a fuel cell, and meanwhile, the mutual coupling between different subsystems is not considered.
In addition, a part of the prior art is also applicable to fuel cell subsystems, such as CN210243168 (refer to fig. 3), but the fuel cell stack is not introduced, and only the actual working process is simulated, and the performance verification or calibration is carried out.
However, the prior art has the following problems:
1. the prior art mainly aims at the performance of a specific subsystem, has single testing or verifying capability and cannot relate to the verification of an engine level;
2. the actual working condition is simulated and data are acquired in a mode of not introducing a galvanic pile, so that the research and development efficiency is low, and the data accuracy is low;
3. in the prior art, influence among subsystems is not considered, and finally obtained data has obvious limitation on research and development of a fuel cell engine;
4. in the prior art, the engine performance tests which can be quickly completed, such as fuel cell airtightness tests, blow-by tests and the like, are not considered to be introduced into a fuel cell engine test platform.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the multifunctional monitoring system for the fuel cell engine and the control method thereof are introduced into performance test capabilities of the fuel cell engine such as airtightness, hydrogen-air system cross-over and the like.
In order to solve the technical problems, the invention adopts the technical scheme that:
a multifunctional monitoring system for a fuel cell engine comprises the fuel cell engine, a testing system and an upper computer; the upper computer controls the operation of the fuel cell engine and the test system;
the test system comprises a fuel hydrogen module, a nitrogen module and an air module which are mutually cooperated to realize test control and verification of the fuel cell engine;
the nitrogen module and the hydrogen module share one inlet to enter the fuel cell engine for purging, air tightness testing and blow-by testing the tested fuel cell engine.
In order to solve the technical problem, the invention adopts another technical scheme as follows:
a control method for a multifunction monitoring system for a fuel cell engine, comprising:
and sending an operation test instruction to the test system through the upper computer, if each module meets the requirement of an expected value corresponding to the operation test instruction, enabling the monitoring system to enter a state corresponding to the operation test instruction or execute corresponding operation, and if not, carrying out fault diagnosis and recording by the upper computer.
The invention has the beneficial effects that: the nitrogen module and the air module are arranged, so that the purging, air tightness test and blow-by test of the tested fuel cell engine can be completed, and the single test capability of most of the conventional subsystem test platforms is improved; the technical method provided by the invention has high flexibility and versatility for testing, developing and calibrating the fuel cell engine, and can be carried out at any time when external conditions allow, such as: air tightness test, blow-by test, hydrogen and oxygen concentration tolerance and other fuel cell engine performance tests.
Drawings
FIG. 1 is a block diagram of a multi-function monitoring system for a fuel cell engine according to an embodiment of the present invention;
FIG. 2 illustrates a method for controlling the start-up of a multi-function monitoring system for a fuel cell engine, in accordance with an embodiment of the present invention;
FIG. 3 illustrates a method for controlling shutdown of a multi-function monitoring system for a fuel cell engine, in accordance with an embodiment of the present invention;
fig. 4 illustrates a blow-by control method for a multifunctional monitoring system for a fuel cell engine according to an embodiment of the present invention.
Detailed Description
In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
Referring to fig. 1 and 2, a multifunctional monitoring system for a fuel cell engine includes a fuel cell engine, a testing system and an upper computer; the upper computer controls the operation of the fuel cell engine and the test system;
the test system comprises a fuel hydrogen module, a nitrogen module and an air module which are mutually cooperated to realize test control and verification of the fuel cell engine;
the nitrogen module and the hydrogen module share one inlet to enter the fuel cell engine for purging, air tightness testing and blow-by testing the tested fuel cell engine.
From the above description, the nitrogen module and the air module are arranged, so that the purging, air tightness test and blow-by test of the tested fuel cell engine can be completed, and the single test capability of most of the conventional subsystem test platforms is improved; the technical method provided by the invention has high flexibility and versatility for testing, developing and calibrating the fuel cell engine, and can be carried out at any time when external conditions allow, such as: air tightness test, blow-by test, hydrogen and oxygen concentration tolerance and other fuel cell engine performance tests.
Further, the hydrogen module comprises a high-pressure hydrogen source and a first pressure regulator, and the high-pressure hydrogen source enters the fuel cell through the first pressure regulator.
From the above description, through the arrangement of the first pressure regulator, the redundant hydrogen pressure can be discharged, the hydrogen pressure in the fuel cell engine can be accurately controlled, and the safety is improved.
Furthermore, the nitrogen module comprises a main line for carrying out primary pressure regulation on the high-pressure nitrogen and a branch line for carrying out secondary pressure regulation on the high-pressure nitrogen, and the branch lines are connected in parallel on the main line.
From the above description, it can be known that the nitrogen pressure requirement of the blow-by test is realized through a primary pressure regulating main route for the high-pressure nitrogen and a branch route for secondary pressure regulating for the high-pressure nitrogen.
Further, the test system also comprises a cooling module used for cooling the fuel cell engine, wherein the cooling module comprises a main cooling path and an auxiliary cooling path; a main heat dissipation path and an auxiliary heat dissipation path are arranged in the fuel cell engine, the main cooling path is communicated with the main heat dissipation path, and the auxiliary cooling path is communicated with the auxiliary heat dissipation path;
and a booster water pump is also arranged on the main cooling road.
As is apparent from the above description, the pressure ratio and the flow rate of the main water inlet and the return water inlet of the fuel cell engine can be increased by the provision of the booster water pump.
Further, the test system also comprises a water replenishing module for replenishing the fuel cell engine and the cooling module with cooling liquid;
the air module is also provided with a branch line for increasing pressure for the water replenishing module;
the main cooling path is provided with a main heat exchange plate, and the main heat exchange plate is used for supplementing water and exchanging heat through the main cooling path;
and a three-way valve is arranged at the cold end inlet of the main heat exchange plate.
As is apparent from the above description, the heat dissipation capacity of the main cooling path can be adjusted easily by the setting of the three-way valve.
Furthermore, the test system further comprises a tail row module, and a hydrogen concentration sensor is arranged on the tail row module.
According to the above description, the hydrogen tail discharge concentration can be tested and recorded by setting the hydrogen concentration sensor, and the hydrogen tail discharge concentration is sent to the upper computer to assist in calculation of hydrogen consumption value and the like; the safety of the test system is improved.
A control method for a multifunction monitoring system for a fuel cell engine, comprising:
and sending an operation test instruction to the test system through the upper computer, if each module meets the requirement of an expected value corresponding to the operation test instruction, enabling the monitoring system to enter a state corresponding to the operation test instruction or execute corresponding operation, and if not, carrying out fault diagnosis and recording by the upper computer.
Further, the operation test is a starting test;
the upper computer sends a starting-up test instruction to the test system; and detecting the air module, the hydrogen module and the cooling module, entering a starting state if the air module, the hydrogen module and the cooling module meet the requirements, and performing fault diagnosis and recording by the upper computer if the air module, the hydrogen module and the cooling module do not meet the requirements.
Further, the operation test is a shutdown test;
the upper computer sends a shutdown test instruction to the test system; if the air module and the hydrogen module meet the requirements, purging the fuel cell engine through the nitrogen module; and shutting down after the purging is finished.
Further, the operation test is a blow-by test;
the upper computer sends a blow-by test instruction to the test system; if the hydrogen module meets the requirements, the main circuit of the nitrogen module is further closed, the branch circuit is opened and is supplied with nitrogen, if the nitrogen does not meet the preset pressure, fault diagnosis is carried out, if the nitrogen meets the preset pressure, the branch circuit is closed, meanwhile, a tail exhaust valve of the fuel cell engine is closed, the micro leakage flow of the branch circuit is recorded, if the micro leakage flow is smaller than the preset value, the gas blowby test is passed, otherwise, the gas blowby test is carried out again.
Example one
Referring to fig. 1, a multifunctional monitoring system for a fuel cell engine includes a fuel cell engine, a test system and an upper computer; the upper computer controls the operation of the fuel cell engine and the test system;
the testing system comprises a fuel hydrogen module, a nitrogen module, an air module, a cooling module, an exhaust and drainage module and a water supplementing module which are cooperated with each other to realize the test control and verification of the fuel cell engine;
the nitrogen module and the hydrogen module share one inlet to enter the fuel cell engine for purging, air tightness testing and blow-by testing the tested fuel cell engine.
The hydrogen module comprises a high-pressure hydrogen source, and the high-pressure hydrogen source is communicated with a hydrogen/nitrogen inlet of the fuel cell engine sequentially through a filter # 1, a manual control valve # 1, a manual pressure regulating valve # 1, an explosion-proof electromagnetic valve, a gas flowmeter and a check valve # 1;
the nitrogen module comprises a high-pressure nitrogen source, a main route and a branch route, wherein the high-pressure nitrogen source is communicated with a hydrogen/nitrogen inlet of the fuel cell engine through the main route; a filter # 2, a manual control valve # 2, a manual pressure regulating valve # 2, an electromagnetic valve # 1 and a check valve # 2 are sequentially arranged between the high-pressure nitrogen source and the hydrogen/nitrogen inlet in the main line; the branch line sequentially comprises an electromagnetic valve # 2, a secondary pressure regulator and a micro-leakage flowmeter, and is connected to two ends of the electromagnetic valve # 1 in parallel;
the air module is respectively used for supplying high-pressure air when the fuel cell engine runs, and provides pressure for the water supplementing module, and the air module comprises a high-pressure air source, a main route and a branch route, wherein the high-pressure air source is communicated with an air inlet of the fuel cell engine through the main route, and a filter # 3, a manual control valve # 3, an electromagnetic valve #4 and a check valve #4 are sequentially arranged between the high-pressure air source and the air inlet in the main route; one end of the branch line is connected to a high-pressure air source, and the other end of the branch line is communicated with a water replenishing port of the fuel cell engine;
the cooling module is used for cooling the fuel cell engine and comprises a water cooler, a main cooling path and an auxiliary cooling path; a main radiating path and an auxiliary radiating path are arranged in the fuel cell engine, the main cooling path is communicated with a main water inlet and a main water outlet of the main radiating path, and the auxiliary cooling path is communicated with an auxiliary water inlet and an auxiliary water outlet of the auxiliary radiating path; the water cooler comprises a water cooler outlet and a water cooler inlet, and the water cooler outlet is communicated with the cold end on the auxiliary heat exchange plate through a liquid flowmeter #2 and connected with the water cooler inlet; the manual valve #4 is connected in parallel to a pipeline between the outlet of the water cooler and the liquid flowmeter #2, and the hot end of the auxiliary heat exchange plate is respectively communicated with an auxiliary water inlet and an auxiliary water outlet; a main heat exchange plate is further connected to a pipeline between the manual valve #4 and the liquid flowmeter #2, a three-way valve is arranged between an inlet and an outlet of a cold end of the main heat exchange plate, and the outlet of the cold end of the main heat exchange plate is communicated with an inlet of a water cooler through a manual valve # 5; the main cooling path is sequentially provided with a conductivity meter and a liquid flowmeter #1 from a main water outlet to a main water inlet, and a pipeline between the conductivity meter and the liquid flowmeter #1 penetrates through the hot end of the main heat exchange plate; two ends of the conductivity meter are connected with a booster water pump in parallel;
the water supplementing module is used for supplementing cooling liquid for the fuel cell engine and the cooling module and comprises a deionization tank, a water supplementing water tank, a three-way valve and a normally open electromagnetic valve, the water supplementing water tank is connected out of a pipeline between the hot end of the main heat exchange plate and the liquid flowmeter # 1 through the deionization tank, and the water supplementing water tank is connected with the normally open electromagnetic valve (a branch line of the air module) through the three-way valve and then connected into a water supplementing port;
the fuel cell engine further comprises a tail discharge port, the exhaust and drainage module is used for discharging water generated inside the fuel cell engine during operation and hydrogen, air and the like for reaction and comprises a tail discharge valve, a hydrogen concentration sensor and a water separator which are sequentially connected from the tail discharge port, and the exhaust and drainage module further comprises an electromagnetic valve # 3 and a check valve # 3 which are led out from a check valve # 1 and led out to the water separator.
The manual pressure regulating valve # 1 of the hydrogen module has an external design and is used for discharging redundant hydrogen pressure and ensuring the accuracy of the hydrogen pressure in the engine.
The branch line in the nitrogen module is used for carrying out secondary pressure regulation on high-pressure nitrogen, and further nitrogen pressure requirements of a blow-by test are met.
The branch line in the air module is used for increasing the pressure of the water replenishing module by introducing high-pressure air after secondary decompression.
The three-way valve in the cooling circuit is used for adjusting the heat dissipation capacity of the main cooling circuit.
Two heat exchange plates in the cooling circuit are respectively used for transferring heat generated in the main/auxiliary cooling circuit by the fuel cell engine.
The booster water pump in the cooling path is for improving the pressure ratio and flow rate of the main water inlet and the return water inlet of the fuel cell engine.
The four check valves (check valve # 1, check valve # 2, check valve # 3, check valve #4) are used to prevent gas backflow, thereby ensuring the quality of the fuel cell engine.
Three filters (filter #1, filter # 2, filter #3) are used to ensure the purity of each gas and to prevent impurities from entering the fuel cell engine.
The hydrogen concentration sensor of tail row is used for guaranteeing the security, tests and records hydrogen tail row concentration simultaneously, sends to the host computer, and supplementary hydrogen consumes calculation such as value.
The functions of the above modules are as follows: the man-machine interaction control, the data display and storage, the fault alarm and the like are all realized by an upper computer through software.
Example two
Referring to fig. 2, a boot control method according to a first embodiment includes:
the upper computer sends a starting-up test instruction to the test system;
detecting whether an electromagnetic valve #4 of the air module is opened or not, and if not, performing fault diagnosis and recording by the upper computer; if Yes, the air module detects whether the air flow counting value is normal, and if NO, the upper computer performs fault diagnosis and recording; if Yes, the requirement is met;
detecting whether an explosion-proof electromagnetic valve of the hydrogen module is opened or not, and if NO is detected, carrying out fault diagnosis and recording by an upper computer; if Yes, the hydrogen module detects whether the gas flow counting value is normal, and if NO, the upper computer performs fault diagnosis and recording; if Yes, the requirement is met;
detecting whether the numerical value of a temperature and pressure sensor of the cooling module is normally started or not, and if not, carrying out fault diagnosis and recording by the upper computer; if Yes, the cooling module detects whether the conductivity value is normal, and if NO, the upper computer performs fault diagnosis and recording; if Yes, the requirement is met;
if the air module, the hydrogen module and the cooling module meet the requirements, the air module, the hydrogen module and the cooling module are started.
EXAMPLE III
Referring to fig. 3, a shutdown control method according to a first embodiment includes:
the upper computer sends a shutdown test instruction to the test system;
detecting whether an electromagnetic valve #4 of the air module is closed or not, and if not, performing fault diagnosis and recording by the upper computer; if Yes, the requirement is met;
detecting whether an explosion-proof electromagnetic valve of the hydrogen module is closed or not, and if not, carrying out fault diagnosis and recording by an upper computer; if Yes, the requirement is met;
if the air module and the hydrogen module meet the requirements, the nitrogen module detects whether the electromagnetic valve # 1 is opened or not and whether the electromagnetic valve # 2 is closed or not, whether the fuel cell engine is purged for 3min through the nitrogen module or not, and after purging is completed, the electromagnetic valve # 1 of the nitrogen module is closed, and shutdown is completed.
Example four
Referring to fig. 4, a blow-by gas control method of the first embodiment includes:
the upper computer sends a blow-by test instruction to the test system;
closing an explosion-proof electromagnetic valve of the hydrogen module;
closing an electromagnetic valve # 1 of a nitrogen module, opening an electromagnetic valve # 2, giving 170kPa nitrogen, if the given nitrogen is insufficient, carrying out fault diagnosis by an upper computer, if the given nitrogen meets the requirements, closing the electromagnetic valve # 2 by the nitrogen module, closing a tail exhaust valve of a fuel cell engine, recording the flow by a micro-leakage flow meter of the nitrogen module, if the flow is less than 250ml/min, passing a blow-by test, otherwise, carrying out the test again
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.
Claims (10)
1. A multifunctional monitoring system for a fuel cell engine is characterized by comprising the fuel cell engine, a testing system and an upper computer; the upper computer controls the operation of the fuel cell engine and the test system;
the test system comprises a fuel hydrogen module, a nitrogen module and an air module which are mutually cooperated to realize test control and verification of the fuel cell engine;
the nitrogen module and the hydrogen module share one inlet to enter the fuel cell engine for purging, air tightness testing and blow-by testing the tested fuel cell engine.
2. The multifunctional monitoring system for a fuel cell engine of claim 1, wherein the hydrogen module comprises a high pressure hydrogen source and a first pressure regulator, the high pressure hydrogen source entering the fuel cell through the first pressure regulator.
3. The multifunctional monitoring system for a fuel cell engine of claim 1, wherein the nitrogen module comprises a main line for primary pressure regulation of high pressure nitrogen and a branch line for secondary pressure regulation of high pressure nitrogen, the branch lines being connected in parallel to the main line.
4. The multifunctional monitoring system for a fuel cell engine of claim 1, wherein the testing system further comprises a cooling module for cooling the fuel cell engine, the cooling module comprising a primary cooling circuit and a secondary cooling circuit; a main heat dissipation path and an auxiliary heat dissipation path are arranged in the fuel cell engine, the main cooling path is communicated with the main heat dissipation path, and the auxiliary cooling path is communicated with the auxiliary heat dissipation path;
and a booster water pump is also arranged on the main cooling road.
5. The multifunctional monitoring system for a fuel cell engine of claim 3, wherein the testing system further comprises a water replenishment module for replenishing the fuel cell engine and the cooling module with coolant;
the air module is also provided with a branch line for increasing pressure for the water replenishing module;
the main cooling path is provided with a main heat exchange plate, and the main heat exchange plate is used for supplementing water and exchanging heat through the main cooling path;
and a three-way valve is arranged at the cold end inlet of the main heat exchange plate.
6. The multifunctional monitoring system for a fuel cell engine of claim 1, wherein the testing system further comprises a tail bank module having a hydrogen concentration sensor disposed thereon.
7. A control method for a multifunction monitoring system for a fuel cell engine, comprising:
and sending an operation test instruction to the test system through the upper computer, if each module meets the requirement of an expected value corresponding to the operation test instruction, enabling the monitoring system to enter a state corresponding to the operation test instruction or execute corresponding operation, and if not, carrying out fault diagnosis and recording by the upper computer.
8. The control method for a multifunctional monitoring system for a fuel cell engine as set forth in claim 7, wherein the operation test is a start-up test;
the upper computer sends a starting-up test instruction to the test system; and detecting the air module, the hydrogen module and the cooling module, if the air module, the hydrogen module and the cooling module meet the requirements, entering a starting state, and if not, performing fault diagnosis and recording by the upper computer.
9. The control method for a multifunctional monitoring system for a fuel cell engine as set forth in claim 7, wherein the operation test is a shutdown test;
the upper computer sends a shutdown test instruction to the test system; if the air module and the hydrogen module meet the requirements, purging the fuel cell engine through the nitrogen module; and shutting down after the purging is finished.
10. The control method for a multifunctional monitoring system for a fuel cell engine as set forth in claim 7, wherein said operation test is a blow-by test;
the upper computer sends a blow-by test instruction to the test system; if the hydrogen module meets the requirements, the main circuit of the nitrogen module is further closed, the branch circuit is opened and is supplied with nitrogen, fault diagnosis is carried out if the nitrogen does not meet the preset pressure, the branch circuit is closed if the nitrogen meets the preset pressure, meanwhile, a tail valve of the fuel cell engine is closed and the micro-leakage flow of the branch circuit is recorded, if the micro-leakage flow is smaller than the preset value, the blow-by test is passed, otherwise, the blow-by test is carried out again.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022212447A1 (en) | 2022-11-22 | 2023-11-30 | Vitesco Technologies GmbH | Method, control device and computer program for detecting a leak in a fuel cell system as well as leak analysis device and fuel cell system |
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- 2021-02-02 CN CN202110142892.9A patent/CN114838937A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022212447A1 (en) | 2022-11-22 | 2023-11-30 | Vitesco Technologies GmbH | Method, control device and computer program for detecting a leak in a fuel cell system as well as leak analysis device and fuel cell system |
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