CN115842144B - Fuel cell thermal management test system - Google Patents
Fuel cell thermal management test system Download PDFInfo
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- CN115842144B CN115842144B CN202211329009.8A CN202211329009A CN115842144B CN 115842144 B CN115842144 B CN 115842144B CN 202211329009 A CN202211329009 A CN 202211329009A CN 115842144 B CN115842144 B CN 115842144B
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- 238000012360 testing method Methods 0.000 title claims abstract description 325
- 239000000446 fuel Substances 0.000 title claims abstract description 56
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 68
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 24
- 238000004891 communication Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 14
- 239000001257 hydrogen Substances 0.000 description 14
- 229910052739 hydrogen Inorganic materials 0.000 description 14
- 238000001816 cooling Methods 0.000 description 13
- 239000007788 liquid Substances 0.000 description 11
- 239000000110 cooling liquid Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 150000002500 ions Chemical class 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
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- 239000012528 membrane Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 239000012809 cooling fluid Substances 0.000 description 2
- 238000003487 electrochemical reaction Methods 0.000 description 2
- 230000002427 irreversible effect Effects 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000012782 phase change material Substances 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012812 general test Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000009428 plumbing Methods 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Fuel Cell (AREA)
Abstract
The invention relates to a fuel cell thermal management testing system, comprising: the main loop section comprises a bypass section, and a bypass control valve is arranged on the bypass section; the storage tank is connected with the main loop section and provides working media required by the test system; the test section is connected with the main loop section through a pipeline to form a test loop; the test section at least comprises an interface area, a first control valve arranged at the upstream of the interface area and a second control valve arranged at the downstream of the interface area; the test section comprises one, more or all of a circulating water pump test section, a heater test section, a thermostat test section, an intercooler test section, a radiator test section, a deionizer test section or a galvanic pile test section. The invention solves the problem that the independent test of a plurality of thermal management components is difficult to realize by a single test bench at present. By the method, the device and the system, the beneficial effects of improving the testing efficiency of the thermal management component and reducing the testing cost are achieved.
Description
Technical Field
The invention relates to the technical field of testing, in particular to a fuel cell thermal management testing system.
Background
The hydrogen fuel cell automobile is one of the important technological routes of new energy automobile, and its basic principle is that hydrogen and oxygen react electrochemically under the action of proton exchange film and relevant catalyst to produce electric energy and heat energy. The generated electric energy can be used for battery storage or directly used as driving force of an automobile, and the generated heat energy can be used for waste heat utilization or directly discharged to the atmosphere. Since the hydrogen fuel cell does not generate harmful substances in the electrochemical reaction process of hydrogen and oxygen, the hydrogen fuel cell is recognized as one of the most promising clean power for the new energy automobile field.
In the automotive field, generally, the operating power of a hydrogen fuel cell is basically between tens of kilowatts and hundreds of kilowatts, and about 50% of the energy exists in the form of heat energy besides the electric energy generated during the operation of the hydrogen fuel cell, and the heat between tens of kilowatts and hundreds of kilowatts is removed in the automotive field of the hydrogen fuel cell in a liquid cooling mode; because the hydrogen fuel cell has a certain sensitivity to temperature, the working temperature of the hydrogen fuel cell needs to be controlled at the optimal point of the corresponding working condition in actual working, and the basic range is controlled between 60 ℃ and 85 ℃, so that in the process of removing heat of the hydrogen fuel cell by using a liquid cooling mode, a circulating water pump, an electronic thermostat, a radiator, an intercooler, a PTC heater and other components need to be used for forming a hydrogen fuel cell thermal management system so as to realize the purpose of controlling the working temperature. In order to realize the control function of the working temperature, the circulating water pump, the electronic thermostat, the intercooler, the PTC heater, the ion filter, the radiator and the thermal management system consisting of the components in the thermal management system are required to be tested. However, most of the current hydrogen fuel cell thermal management test benches have single testing functions, and it is difficult to realize independent testing of multiple thermal management components by a single test bench.
Disclosure of Invention
Based on this, it is necessary to provide a fuel cell thermal management testing system with independent test sections in response to the above-described problems.
A fuel cell thermal management testing system, comprising:
the main loop section comprises a bypass section, and a bypass control valve is arranged on the bypass section;
the storage tank is connected with the main loop section and provides working media required by the test system;
the test section is connected with the main loop section through a pipeline so as to form a test loop; the test section at least comprises an interface area, a first control valve arranged at the upstream of the interface area and a second control valve arranged at the downstream of the interface area; the test section comprises one, more or all of a circulating water pump test section, a heater test section, a thermostat test section, an intercooler test section, a radiator test section, a deionizer test section or a galvanic pile test section.
In one embodiment, the interface area of the thermostat test section at least comprises three joints, and a first control valve, a second control valve and a third control valve are respectively arranged on a pipeline connected with the joints.
In one embodiment, the intercooler test section, the heater test section, and the deionizer test section share the same interface region.
In one embodiment, a pump is provided on the main circuit section, a first main circuit section control valve is provided upstream of the pump, and a second main circuit section control valve is provided downstream of the pump.
In one embodiment, when the circulating water pump test section is connected (connected to the main circuit section), the first main circuit section control valve and the second main circuit section control valve are closed, and when the remaining test sections of the circulating water pump test section are connected (connected to the main circuit section), the circulating water pump test section is closed, and the first main circuit section control valve and the second main circuit section control valve are opened, so that the pump is connected in series with the remaining test sections.
In one embodiment, the circulating water pump test section is disposed in parallel with the pump, the first main circuit section control valve, and the second main circuit section control valve.
In one embodiment, the test section includes a temperature sensor and a pressure sensor.
In one embodiment, the ion filter test section, intercooler test section, or heater test section is further provided with a conductivity sensor.
In one embodiment, the test system includes a water replenishment valve disposed between the tank and an external water source and a drain valve connected to the main circuit segment.
In one embodiment, the main circuit section is provided with a flow meter.
According to the test system, the switching of each branch control valve of the thermal management test bench is controlled according to the test section so as to realize the switching of the test section, the test of a plurality of thermal management components is independently corresponding to different test loops, and the test mode of the test system can be selected by an upper computer, so that the operation is convenient and efficient. The invention solves the problem that the independent test of a plurality of heat management components is difficult to realize by the single test bench at present, and achieves the beneficial effects of improving the test efficiency of the heat management components and reducing the test cost.
Drawings
FIG. 1 is a schematic diagram of a thermal management testing system for a fuel cell according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a test loop of a circulating water pump in a thermal management test system for a fuel cell according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a thermostat test circuit in a fuel cell thermal management test system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a heat sink test loop in a thermal management test system for a fuel cell according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a heater test loop in a fuel cell thermal management test system according to an embodiment of the invention;
FIG. 6 is a schematic diagram of a stack test loop in a thermal management test system for a fuel cell according to an embodiment of the present invention;
fig. 7 is a test flow chart of a fuel cell thermal management test system according to an embodiment of the invention.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Several unit cells are typically combined into a fuel cell stack to produce the desired power. The fuel cell may be applied to the automotive field, and the vehicle includes a fuel cell for supplying electric power to at least one motor, into which hydrogen fuel and air are fed during operation of the vehicle, thereby forming electric power. The fuel cell heat is derived from entropy heat of reaction, irreversible heat of electrochemical reaction, heat of ohmic resistance, heat generated by condensation of water vapor, and the like. Of which 80% depends on the entropy heat and the reaction heat, and the effective removal of this part of the heat becomes a key point for cooling. Too high a temperature can dehydrate the proton exchange membrane and interrupt proton conduction and conduction, resulting in a decrease in the water content of the cathode catalyst and even irreversible consequences; at the same time, the temperature of the membrane has non-uniformity, which reduces the stability and durability of the proton exchange membrane.
The fuel cells generate heat during operation and include an associated thermal management system for thermally regulating the temperature of the stack. The thermal management system may include pumps, radiators, intercoolers, thermostats, deionizers or ion exchangers, valves, and their corresponding plumbing. The pump is an indispensable component in the pipeline, and can increase the flow rate of the working medium to cool the electric pile, regardless of whether the gas is used as the cooling working medium of the heat management system or the liquid is used as the cooling working medium. The radiator has the functions of transferring the heat of the cooling liquid to the environment, reducing the temperature of the cooling liquid, and has the advantages of large heat dissipation capacity required by the radiator body, high cleanliness requirement, low ion release rate, large fan requirement of the radiator, stepless speed regulation and the like. The intercooler cools the hot air from the air compressor through the heat exchange of the cooling liquid and the air, so that the air entering the electric pile is at a proper temperature. In fuel cell operation, a high voltage is generated across the bipolar plates, but at the same time it is required that the high voltage is not transferred through the cooling fluid in between the bipolar plates to the entire cooling circulation flow path, and therefore it is required that the cooling fluid is not electrically conductive. The ion remover is applied to a cooling system of a fuel cell engine and is mainly used for removing conductive ions in cooling liquid. The thermostat is used for controlling the size circulation of the cooling system, and automatically adjusts the water quantity entering the radiator according to the temperature of the cooling water so as to ensure that the fuel cell works in a proper temperature range. The thermal management system may heat the fuel cell or be responsible for supplying heat to the passenger compartment in addition to cooling the fuel cell. For example, it is difficult to start a fuel cell in very cold ambient conditions (e.g., below-25 degrees celsius). To improve cold start, preheating may be performed by circulating a heated coolant through one or more of the fuel cells. After the stack reaches a threshold temperature (e.g., -25 degrees celsius as described above), the fuel cell is started. The temperatures described above are merely exemplary temperatures, and the threshold temperature will vary based on fuel cell design and other factors. Once the fuel cell is started, the preheating may be ended, as heat from the chemical reaction will self-heat the fuel cell stack to the desired operating temperature, at which point active cooling by the thermal management system may be required. Preheating may be performed by an electric heater, such as a positive temperature coefficient (Positive Temperature Coefficient, PTC) heater. Each of the above components is related to the efficiency of thermal management of the fuel cell, and thus to the power generation efficiency and life of the cell, and thus it becomes quite critical to conduct testing of the thermal management system. In fact, not all vehicles use the same thermal management system, the thermal management system can be divided into air cooling, liquid cooling and Phase Change Material (PCM) cooling according to the cooling medium, and can be divided into active type and passive type according to whether active management is performed, the structures and corresponding elements of different types of thermal management systems are different, and a general test system which can adapt to the tested objects with different structures is not available at present.
Accordingly, fig. 1 shows a schematic diagram of a fuel cell thermal management testing system according to an embodiment of the present invention, and a fuel cell thermal management testing system 1 according to an embodiment of the present invention includes a main loop section 10, a tank 70, and at least one testing section. The main circuit segment 10 is made up of several lines that connect the test segments together to form a test circuit. The tank 70 is connected by piping to the main circuit section 10 for testing the working medium required by the system. Specifically, the tank 70 is connected to the main circuit section 10 by a water line 72. In this case, the working medium is a liquid, in particular water. The inlet end of the tank 70 is also connected to a water replenishment valve 71, and the tank 70 and upstream of the replenishment valve 71 are connected to a source of working medium, in this embodiment an external water source. A drain valve 74 is also provided on the main circuit section 10 for draining excess working medium. In the present embodiment, the water replenishment valve 71 and the water discharge valve 74 are valves that can be automatically controlled, and may be solenoid valves.
The fuel cell thermal management testing system 1 of this embodiment includes a plurality of independent test sections, the independence means that when a certain test loop is tested, other test loops will not interfere, and simultaneously, the user can control the on-off of each test section according to the demand, so that any test section can form an independent complete test loop with the main loop section according to the demand.
The test sections are connected with the main loop section 10 through pipelines, and one test section of the test sections at least comprises an interface area, a first control valve arranged at the upstream of the interface area and a second control valve arranged at the downstream of the interface area. In this embodiment, the upstream means the inlet direction of a certain component, in other words, a component is connected by a pipe between an inlet on the same pipe or a connected pipe and an outlet of another component, which is referred to as the other component being upstream of the component. The main loop section also comprises at least one bypass section, the bypass section and the test section are connected in parallel, and a bypass control valve is arranged on the bypass section. When the main loop section further comprises a bypass section, the rest of the plurality of test sections are all connected with the whole or part of the bypass section in parallel, when the bypass section is provided with a bypass valve, the test sections are also arranged in parallel, the arrangement mode is suitable for the condition that the test loops all need independent testing, when the bypass section is provided with a plurality of bypass valves, the rest of the plurality of test sections are all connected with the plurality of bypass valves of the bypass section in parallel, and the rest of the test sections can be connected in one-to-one parallel or in many-to-one or one-to-many parallel. When the main loop section further comprises a plurality of bypass sections, each bypass section is provided with a bypass valve, and the plurality of test sections can be mutually used as the bypass sections or can be independently connected with the bypass sections in parallel. The setting mode can be suitable for various test situations, and corresponding test loops are designed for different test situations.
The test sections include a combination of one or more of a circulating water pump test section 20, a PTC heater test section 50, a thermostat test section 30, an intercooler test section, a radiator test section 40, a deionizer test section, or a galvanic pile test section 60. Further, the circulating water pump test section 20, the PTC heater test section 50, the thermostat test section 30, the intercooler test section, the radiator test section 40, the deionizer test section or the galvanic pile test section 60 may be individually connected to the main circuit section 10 to form an independent test circuit. Further, the circulating water pump test section 20, the PTC heater test section 50, the thermostat test section 30, the intercooler test section, the radiator test section 40, the deionizer test section or the galvanic pile test section 60 may be combined in pairs, three of them are combined with each other, four of them are combined with each other, five of them are combined with each other or six of them are combined with each other and then connected to the main circuit section 10 through a pipeline to form a corresponding required test circuit, for example, when the thermostat and the radiator are required to be tested at the same time, the thermostat test section 30 and the radiator test section 40 are connected to the main circuit section 10 through similar connection methods described below in this embodiment to form a corresponding test circuit, and then the pipelines such as the bypass section are also adjusted accordingly, which will not be repeated herein. Further, in some special cases, the circulating water pump test section 20, the PTC heater test section 50, the thermostat test section 30, the intercooler test section, the radiator test section 40, the deionizer test section or the galvanic pile test section 60 may also be connected to the main circuit section 10 for testing, so that the pipelines such as the bypass section are correspondingly adjusted, which is not repeated herein.
In the present embodiment, there are at least 3 bypass segments in total, including a stack bypass segment 11 connected in parallel with the stack test segment 60, a radiator bypass segment 12 connected in parallel with the radiator test segment 40, and a thermostat bypass segment 13 connected in parallel with the thermostat test segment 30. The stack bypass section 11 includes a stack bypass 11b and a stack bypass control valve 11a provided on the stack bypass 11 b. The stack bypass section 11 includes a stack bypass 11b and a stack bypass control valve 11a provided on the stack bypass 11 b. The radiator bypass segment 12 includes a radiator bypass 12b and a radiator bypass control valve 12a provided on the radiator bypass 12 b. The thermostat bypass section 13 includes a thermostat bypass 13b and a thermostat bypass control valve 13a provided on the thermostat bypass 13 b.
Further, the main circuit section is further provided with a first flowmeter 19, a first temperature sensor 14, a second temperature sensor 15, a third temperature sensor 16, a particulate filter 18 and a flow regulating valve 17. In the present embodiment, the first flowmeter 19 is a rotameter. The flow rate control valve 17 has a function of controlling the back pressure of the test system.
The circulating water pump test section 20 includes a circulating water pump test interface area 21, a first circulating water pump control 24 valve located upstream of the interface area, and a second circulating water pump control valve 25 located downstream of the interface area. The circulating water pump test interface area 21 is connected with a target object to be tested, and the interface area comprises two interfaces, an inlet interface and an outlet interface. The circulating water pump test interface area 21 is connected to the main loop section 10 through a pipeline, and comprises a circulating water pump inlet pipeline connected with a first circulating water pump control valve 24 and a circulating water pump outlet pipeline connected with a second circulating water pump control valve 25, wherein the circulating water pump inlet pipeline is connected with an inlet interface, and the circulating water pump outlet pipeline is connected with an outlet interface. A first inlet pressure sensor 22 is arranged between the first circulating water pump control valve 24 and the inlet interface, and a second outlet pressure sensor 23 is arranged between the second circulating water pump control valve 25 and the outlet interface. The main circuit section 10 is provided with a pump 101, a first main circuit section control valve 102 is provided upstream of the pump 101, and a second main circuit section control valve 103 is provided downstream of the pump 101. The circulating water pump test section 20 is parallel to the pump 101, the first main loop section control valve 102 and the second main loop section control valve 103, and can be regarded as the bypass section of the circulating water pump test section 20 where the pump 101, the first main loop section control valve 102 and the second main loop section control valve 103 and the pipeline thereof are located. When the circulating water pump test section 20 is communicated, the first main loop section control valve 102 and the second main loop section control valve 103 are closed, if the other test sections are not selected to be connected, the control valves of the other test sections are closed, and the control valves of the other test sections are communicated, so that the circulating water pump test section 20, the main loop section 10, the electric pile side section 11, the radiator side section 12 and the thermostat side section 13 form a circulating water pump test loop 200, as shown in fig. 2. When the rest of the test sections are communicated, the first main loop section control valve 102 and the second main loop section control valve 103 are opened, and the first circulating water pump control valve 24 and the second circulating water pump control valve 25 are closed, so that the pump 101 is connected in series with the rest of the test sections. In this embodiment, the control valve may be a pneumatic switching valve, or may be a solenoid valve, an electric valve, or the like in other embodiments.
Further, when the water circulation pump test section 20 is connected to the main circuit section 10, i.e. the first water circulation pump control valve 24 and the second water circulation pump control valve 25 are opened, the first main circuit section control valve 102 and the second main circuit section control valve 103 are closed, and the water circulation pump test section 20 is connected in series with the first flowmeter 19, the first temperature sensor 14, the second temperature sensor 15, the third temperature sensor 16, the particulate filter 18 and the flow regulating valve 17, as shown in fig. 2. The tank 70 and the water replenishment valve 71 etc. are connected to the main circuit section 10, and the main circuit section 10 is also connected to the tank 70 by a working medium return line 73 to circulate working medium between the tank, the main circuit section and the test section. The circulating water pump test circuit 200 can independently realize the endurance test, MAP performance test and the like of the circulating water pump.
The thermostat test section 30 includes a thermostat test interface area 31. The thermostat is generally a three-way valve, and comprises an inlet pipeline, a small circulation pipeline and a large circulation pipeline, wherein the large circulation pipeline passes through the radiator, higher heat is taken away by the radiator, cooling liquid with reduced temperature enters the electric pile from an outlet of the radiator, and the residual heat of the reaction in the electric pile is discharged and returned to an inlet of the cooling water pump; the small circulation does not pass through the radiator, the cooling liquid directly enters the electric pile from the outlet of the thermostat, the reaction waste heat in the electric pile is brought out, and the cooling liquid returns to the inlet of the cooling water pump again. Thus, the thermostat test interface area 31 includes three junctions, namely an inlet interface, a large circulation outlet interface, and a small circulation outlet interface. The inlet port is connected to the main loop section through an inlet pipeline, the large circulation outlet port is connected to the main loop section through a large circulation outlet pipeline, and the small circulation outlet port is connected to the main loop section through a small circulation outlet pipeline. In this embodiment, the above-mentioned large circulation outlet port and small circulation outlet port may also be directly provided on the main circuit section. In this embodiment, the thermostat to be tested may be an electronic thermostat, in particular.
A first thermostat control valve 32 is arranged at the upstream of the inlet interface of the thermostat test interface area 31, and a second thermostat control valve 33 and a third thermostat control valve 34 are respectively arranged at the downstream of the large circulation outlet interface and the small circulation outlet interface. The main circuit section 10 further includes a thermostat bypass section 13, one end of the thermostat bypass section 13 being connected to the inlet pipe, and the other end of the thermostat bypass section 13 being connected to the large circulation outlet pipe or the small circulation outlet pipe. Specifically, one end of the thermostat bypass section 13 is connected upstream of the first thermostat control valve 32, and the other end of the thermostat bypass section 13 is connected downstream of the second thermostat control valve 33 or the third thermostat control valve 34. When the thermostat test section 30 is in communication, the first thermostat control valve 32, the second thermostat control valve 33, and the third thermostat control valve 34 are open, the first main circuit section control valve 102 and the second main circuit section control valve 103 are open, and the remaining test sections are selectively closed. The thermostat test section 30, the main circuit section 10, the stack bypass section 11, and the radiator bypass section 12 constitute a thermostat test circuit 300, as shown in fig. 3. In the present embodiment, when the thermostat test section 30 is closed, the first thermostat control valve 32, the second thermostat control valve 33, and the third thermostat control valve 34 are closed, and the thermostat bypass valve 13a is opened, at this time, the operation of the main circuit section or other test section is not affected. In this embodiment, the control valve may be a pneumatic switching valve, or may be a solenoid valve, an electric valve, or the like in other embodiments.
Further, a second inlet pressure sensor 35 is disposed upstream of the inlet port of the thermostat test port area 31, the second inlet pressure sensor 35 is located between the inlet port and the first thermostat control valve 32, a second outlet pressure sensor 36 and a third outlet pressure sensor 37 are disposed downstream of the large circulation outlet port and the small circulation outlet port, respectively, the second outlet pressure sensor 36 is disposed between the large circulation outlet port and the second thermostat control valve 33, and the third outlet pressure sensor 37 is disposed between the small circulation outlet port and the third thermostat control valve 34. A second flowmeter 38 is also provided between the small cycle outlet port and the third thermostat control valve 34.
The radiator test section 40 includes a radiator test interface area 41, a first radiator control valve 42 disposed upstream of the interface area, and a second radiator control valve 43 disposed downstream of the interface area. The interface area includes two interfaces, an ingress interface and an egress interface. The radiator test interface area 41 is connected to the main circuit section 10 by piping, including a radiator inlet piping connected to the first radiator control valve 42 and a radiator outlet piping connected to the second radiator control valve 43. The radiator inlet pipeline is connected with the inlet interface, and the radiator outlet pipeline is connected with the outlet interface. The main circuit section 10 further includes a radiator bypass section 12, one end of the radiator bypass section 12 being connected to the inlet line and the other end of the radiator bypass section being connected to the outlet line. Specifically, one end of the radiator bypass segment 12 is connected upstream of the first radiator control valve 42, and the other end of the radiator bypass segment 12 is connected downstream of the second radiator control valve 43. The radiator bypass section 12 is provided with a radiator bypass valve 12a. In this embodiment, the control valve and the bypass valve may be pneumatic switching valves, or may be solenoid valves, electric valves, or the like in other embodiments. When the radiator test section 40 is in communication, the first radiator control valve 42 and the second radiator control valve 43 are open, the first main circuit section control valve 102 and the second main circuit section control valve 103 are open, and the remaining test sections are optionally closed. The radiator test section 30, the main circuit section 10, the stack-side section 11, and the thermostat-side section 13 together constitute a radiator test circuit 400, as shown in fig. 4. When the radiator test section 40 is closed, the first radiator control valve 42 and the second radiator control valve 43 are closed, and the radiator bypass valve 12a is opened, at this time, the operation of the main circuit section or other test section is not affected.
Further, the radiator test section 40 and the thermostat test section 30 may share the same bypass section. In fact, the radiator bypass segment 12 may also be considered as part of the main circuit segment 10, while the radiator test segment 40 and the thermostat test segment 30 are considered as bypass segments of the main circuit segment 10.
Further, a third inlet pressure sensor 44 is provided upstream of the inlet port of the radiator test port area 41, specifically, the third inlet pressure sensor 44 is located between the inlet port and the first radiator control valve 42. Downstream of the outlet interface is a fourth outlet pressure sensor 45, in particular, the fourth outlet pressure sensor 45 is located between the outlet interface and the second radiator control valve 43.
The heater test section 50 includes a heater test interface section 51, a first heater control valve 52 disposed upstream of the interface section, and a second heater control valve 53 disposed downstream of the interface section. In this embodiment, the heater may be a PTC heater. The interface area includes two interfaces, an ingress interface and an egress interface. The heater test interface section 51 is connected to the main circuit section by piping, including a heater inlet piping connected to the first heater control valve 52 and a heater outlet piping connected to the second heater control valve 53, the heater inlet piping being connected to the inlet interface, and the heater outlet piping being connected to the outlet interface. The main circuit section 10 further includes a heater bypass section, one end of which is connected to the inlet pipe and the other end of which is connected to the outlet pipe. Specifically, one end of the heater bypass section is connected to the upstream of the first heater control valve, and the other end of the heater bypass section is connected to the downstream of the second heater control valve. The heater bypass section is provided with a heater bypass valve. In this embodiment, the control valve and the bypass valve may be pneumatic switching valves, or may be solenoid valves, electric valves, or the like in other embodiments. When the heater test section 50 is in communication, the first 52 and second 53 heater control valves are open, the first 102 and second 103 main loop section control valves are open, and the remaining test sections are selectively closed. When the heater test section 50, the radiator bypass section 12, the thermostat bypass section 13, and the main circuit section 10 constitute a heater test circuit 500, as shown in fig. 5. When the heater test section 50 is closed, the first and second heater control valves 52 and 53 are closed and the heater bypass valve is open, at which time the operation of the main loop section or other test section is not affected. In the present embodiment, the heater bypass section is shared with the stack bypass section 11.
Because of the similarity of the test contents, the intercooler test section, the heater test section, and the deionizer test section share the same interface region. In the actual test process, the first heater control valve 52 and the second heater control valve 53 can be controlled to be closed to realize the rapid interception of the heater test section and the rapid replacement among the deionizer test section, the intercooler test section and the heater test section.
Further, the heater test section 50 also includes a fourth inlet pressure sensor 54, a fifth outlet pressure sensor 55, a first conductivity sensor 56, a second conductivity sensor 57, a fourth temperature sensor 58, and a third flowmeter 59. A fourth inlet pressure sensor 54 is provided upstream of the inlet port of the heater test interface area 51, in particular, the fourth inlet pressure sensor 54 is located between the inlet port and the first heater control valve 52. A fifth outlet pressure sensor 55 is provided downstream of the outlet interface of the heater test interface area 51, in particular, the fifth outlet pressure sensor 55 is located between the outlet interface and the second heater control valve 53. A first conductivity sensor 56 is provided upstream of the inlet interface of the heater test interface area, specifically, the first conductivity sensor 56 is located between the inlet interface and the first heater control valve 52. A second conductivity sensor 57 is provided downstream of the outlet interface of the heater test interface area 51, in particular, the second conductivity sensor 57 is located between the outlet interface and the second heater control valve 53. A fourth temperature sensor 58 is provided downstream of the outlet interface of the heater test interface area 51, in particular, the fourth temperature sensor 58 is located between the outlet interface and the second heater control valve 53. A third flow meter 59 is provided downstream of the outlet interface of the heater test interface area 51, specifically, the third flow meter 59 is located downstream of the second heater control valve 53.
The stack testing section 60 comprises a stack testing interface zone 61, a first stack control valve 62 arranged upstream of the interface zone, and a second stack control valve 63 arranged downstream of the interface zone. The interface area includes two interfaces, an ingress interface and an egress interface. The stack test interface section 61 is connected to the main circuit section 10 by piping, including a stack inlet piping connected to the first stack control valve 62 and a stack outlet piping connected to the second stack control valve 63, the stack inlet piping being connected to the inlet interface, and the stack outlet piping being connected to the outlet interface. The main circuit section 10 further includes a stack bypass section 11, one end of the stack bypass section 11 being connected to the inlet pipe, and the other end of the stack bypass section 11 being connected to the outlet pipe. Specifically, one end of the stack-side section 11 is connected upstream of the first stack control valve 62, and the other end of the stack-side section 11 is connected downstream of the second stack control valve 63. The stack bypass valve 11a is provided in the stack bypass section 11. In this embodiment, the control valve and the bypass valve may be pneumatic switching valves, or may be solenoid valves, electric valves, or the like in other embodiments. When the stack test sections 60 are in communication, the first and second stack control valves 62, 63 are open, the first and second main loop section control valves 102, 103 are open, and the remaining test sections are optionally closed. When the stack test section 60, the main circuit section 10, the thermostat bypass section 13, and the radiator bypass section 12 constitute a stack test circuit, as shown in fig. 4. When the stack test section 60 is closed, the first and second stack control valves 62 and 63 are closed and the stack bypass valve 11a is opened, at which time the operation of the main circuit section or other test sections is not affected. The stack test section 60 and the heater test section 50 may share the same bypass section. In fact, the stack bypass segment 11 may also be considered as part of the main loop segment 10, while the stack test segment 60 and the heater test segment 30 are considered as bypass segments of the main loop segment.
Further, a fifth inlet pressure sensor 64 is provided upstream of the inlet port of the stack test interface section 61, specifically, the fifth inlet pressure sensor 64 is located between the inlet port and the first stack control valve 62. Downstream of the outlet interface, a sixth outlet pressure sensor 65 is provided, in particular, the sixth outlet pressure sensor 65 being located between the outlet interface and the second stack control valve 63.
The fuel cell thermal management testing system 1 further comprises a control unit, a communication unit and a storage unit, wherein an operator transmits tested information or signals to the control unit through the communication unit, and the control unit is used for controlling the on-off of the control valve so as to realize remote switching of different testing sections. Specifically, an operator is provided with an upper computer in communication with the communication unit. According to the test requirement, the upper computer can select the test function, and each test function corresponds to each test loop. The test functions include: a circulating water pump test mode, a PTC heater test mode, an electronic thermostat test mode, an intercooler test mode, a radiator test mode, a deionizer test mode, a galvanic pile test mode, and a combination manual control mode. The test modes are selected from a manual test mode and an automatic test mode, and after the manual test mode enters the corresponding test mode, the object test is carried out by manually adjusting each parameter of the upper computer; the automatic test mode is to input the parameters to be tested once after entering the corresponding test mode, and the system carries out PID adjustment according to the test parameters to automatically carry out test execution; the combined manual control mode refers to that the full-bench actuator determines a test process according to the setting of a tester, such as a pneumatic valve of a manual control bench, so as to form a combined test loop of the water pump and the electronic thermostat.
The specific test process comprises the following steps:
s1, testing preparation.
After the test bench is opened, the system firstly performs self-checking, wherein the self-checking comprises whether the pressure is normal, whether the temperature is normal and whether the liquid level is normal. The self-checking result is displayed on the upper computer, and when the self-checking has an alarm fault, the next step can be carried out after the fault is removed; such as: the upper computer displays the current water tank liquid level test result, displays liquid level alarm and liquid level normal according to the liquid level result, and the system refuses to enter a test mode in the state of liquid level alarm; at this time, the tester should enter the water replenishing mode through the upper computer, the tester supplements water through the automatic or manual control system, and after the water replenishing is finished, the system side can perform the next test.
S2, selecting a test mode.
The circulating water pump test mode, the PTC heater test mode, the electronic thermostat test mode, the intercooler test mode, the radiator test mode, the deionizer test mode and the electric pile test mode respectively correspond to the test loops. Each mode includes a manual test mode and an automatic test mode. Wherein, when the tester needs multiple types of components to test simultaneously, the combined manual control mode can be entered. In the combined manual control mode, the tester decides the closing and closing of each actuator in the test bench according to the test requirement to decide the test type, such as: the combined test of the water pump and the electronic thermostat, the combined test of the electronic thermostat and the radiator, and the combined test of the water pump, the electronic thermostat and the intercooler can be determined, and the combined test comprises, but is not limited to, simultaneous tests of 1 component, 2 components, 3 components, 4 components and the like.
And S3, ending the test.
In the manual mode, a tester clicks to determine that the test is finished, the test bench automatically restores to the initial state, and the test is displayed through the upper computer; in the automatic mode, after the test is completed, the test bench automatically restores to the initial state and the test is finished through the upper computer display.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A fuel cell thermal management testing system, comprising:
the main loop section comprises a bypass section, and a bypass control valve is arranged on the bypass section;
the storage tank is connected with the main loop section and provides working media required by the test system;
the test section is connected with the main loop section through a pipeline so as to form a test loop; the test section at least comprises an interface area, a first control valve arranged at the upstream of the interface area and a second control valve arranged at the downstream of the interface area; the test section comprises one, more or all of a circulating water pump test section, a heater test section, a thermostat test section, an intercooler test section, a radiator test section, a deionizer test section or a galvanic pile test section.
2. The fuel cell thermal management testing system according to claim 1, wherein the interface area of the thermostat testing section comprises at least three joints, and a first control valve, a second control valve and a third control valve are respectively arranged on a pipeline connected with the joints.
3. The fuel cell thermal management testing system according to claim 1, wherein the intercooler test section, the heater test section, and the deionizer test section share the same interface region.
4. The fuel cell thermal management testing system of claim 1, wherein a pump is provided on the main circuit segment, a first main circuit segment control valve is provided upstream of the pump, and a second main circuit segment control valve is provided downstream of the pump.
5. The fuel cell thermal management testing system of claim 4, wherein when the circulating water pump test section is in communication, the first and second main loop section control valves are closed, and when the remaining test sections are in communication, the circulating water pump test section is closed, and the first and second main loop section control valves are opened such that the pump is in series with the remaining test sections.
6. The fuel cell thermal management testing system of claim 5, wherein the circulating water pump test section is disposed in parallel with the pump, first main loop section control valve, and second main loop section control valve.
7. The fuel cell thermal management testing system of claim 1, wherein the test section comprises a temperature sensor and a pressure sensor.
8. The fuel cell thermal management testing system according to claim 1, wherein the ion filter test section, intercooler test section, or heater test section is further provided with a conductivity sensor.
9. The fuel cell thermal management testing system of claim 1, wherein the testing system comprises a water replenishment valve disposed between the tank and an external water source and a water drain valve connected to the main circuit segment.
10. The fuel cell thermal management testing system of claim 1, wherein the main circuit section is provided with a flow meter.
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