CN112928304B - Cooling loop testing device of fuel cell for automobile - Google Patents
Cooling loop testing device of fuel cell for automobile Download PDFInfo
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- CN112928304B CN112928304B CN202110090644.4A CN202110090644A CN112928304B CN 112928304 B CN112928304 B CN 112928304B CN 202110090644 A CN202110090644 A CN 202110090644A CN 112928304 B CN112928304 B CN 112928304B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04029—Heat exchange using liquids
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04014—Heat exchange using gaseous fluids; Heat exchange by combustion of reactants
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04701—Temperature
- H01M8/04708—Temperature of fuel cell reactants
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04746—Pressure; Flow
- H01M8/04753—Pressure; Flow of fuel cell reactants
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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
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- Y02E60/50—Fuel cells
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Abstract
The invention discloses a cooling loop testing device of a fuel cell for an automobile, which comprises: a coolant heat sink assembly; the device comprises a first cooling liquid pipe and a second cooling liquid pipe, wherein one end of the first cooling liquid pipe and one end of the second cooling liquid pipe are respectively connected with the outlet end and the inlet end of a cooling liquid radiating assembly, the other end of the first cooling liquid pipe and the other end of the second cooling liquid pipe are respectively used for connecting the cooling liquid input end and the cooling liquid output end of a cooling loop of the tested electric pile, a water pump is arranged on the first cooling liquid pipe, and the cooling liquid radiating assembly, the water pump and the cooling loop of the tested electric pile are connected through the first cooling liquid pipe and the second cooling liquid pipe to form a test loop; a temperature control expansion water tank; a plurality of temperature sensors and a plurality of pressure sensors; a plurality of flow sensors; a plurality of solenoid valves; a deionizer; an on-line conductivity tester; the test of various parameters of the cooling circuit of the fuel cell can be realized, and the performance of the cooling circuit of the fuel cell is ensured to reach the standard.
Description
Technical Field
The invention belongs to the technical field of fuel cell cooling loop testing, and particularly relates to a cooling loop testing device for an automobile fuel cell.
Background
The low conductivity of a cooling loop of the vehicle-mounted fuel cell must be kept in the operation process, and the over-high conductivity of the cooling liquid can cause a series of problems of insulation failure of the whole vehicle, reduction of the efficiency of the fuel cell and the like, so that the fuel cell and the whole vehicle can not normally operate, and a large potential safety hazard is generated. It is therefore of great importance to test the ion elution of the fuel cell cooling circuit and to process it accordingly. Meanwhile, different from the design requirements of heat dissipation modules of common fuel vehicles and electric vehicles, in order to ensure stable and efficient operation of a fuel cell system, the vehicle-mounted fuel cell heat dissipation module not only needs to consider the heat dissipation capacity of the vehicle-mounted fuel cell heat dissipation module, but also needs to consider various factors such as flow resistance change caused by different types and setting positions of the deionizers, ion precipitation conditions of the whole cooling circuit under different working conditions, influence of high and low temperatures on the working states of all parts of the cooling circuit and the like. The test bench of the existing fuel cell cooling circuit only focuses on testing the heat dissipation performance of the radiator, but cannot test other parameters which play an important role in the normal operation of the fuel cell, so that various problems often occur in the fuel cell cooling circuit, and the normal operation of the fuel cell is seriously influenced.
Disclosure of Invention
The invention aims to provide a cooling loop testing device of an automobile fuel cell, aiming at the defects in the prior art, the device not only can simulate a vehicle-mounted environment, ensure that the testing environment is similar to the vehicle-mounted environment and improve the testing accuracy, but also can realize the testing of various parameters of the cooling loop of the fuel cell through the arrangement of various sensors, deionizers and conductivity online testers, and ensure that the performance of the cooling loop of the fuel cell reaches the standard.
In order to achieve the above object, the present invention provides a cooling circuit testing apparatus for a fuel cell for an automobile, comprising:
a coolant heat sink assembly;
one end of the first cooling liquid pipe and one end of the second cooling liquid pipe are respectively connected with the outlet end and the inlet end of the cooling liquid heat dissipation assembly, the other end of the first cooling liquid pipe and the other end of the second cooling liquid pipe are respectively used for being connected with a cooling liquid input end and a cooling liquid output end of a cooling circuit of the tested electric pile, a water pump is arranged on the first cooling liquid pipe, and the cooling liquid heat dissipation assembly, the water pump and the cooling circuit of the tested electric pile are connected through the first cooling liquid pipe and the second cooling liquid pipe to form a testing circuit;
the temperature control expansion water tank is arranged on the test loop;
a plurality of temperature sensors and a plurality of pressure sensors for measuring the temperature and pressure of the cooling fluid at different locations in the test circuit, respectively;
a plurality of flow sensors for measuring coolant flow at different locations in the test loop;
a plurality of solenoid valves for controlling the flow of the cooling fluid in the test loop;
a deionizer connected to the second cooling liquid pipe through a branch pipe;
and the conductivity online tester is arranged on the first cooling liquid pipe.
Optionally, the measured electric pile cooling loop is an electric pile cooling loop simulation module, the electric pile cooling loop simulation module includes a casing, the two ends of the casing are respectively provided with the cooling liquid input end and the cooling liquid output end, a plurality of guide plates are arranged inside the casing, a cooling flow channel is formed between adjacent guide plates, and the material of the guide plates is the same as that of the metal bipolar plate of the fuel cell.
Optionally, the temperature control expansion tank is arranged at one end, close to the coolant output end of the cooling loop of the tested galvanic pile, of the second coolant pipe, and a temperature rise assembly and a temperature reduction assembly are arranged inside the temperature control expansion tank.
Optionally, the branch pipeline includes first branch pipe and second branch pipe, the one end of deionizer is connected with the one end of first branch pipe, the other end of deionizer is connected with the one end of second branch pipe, the other end of first branch pipe with second coolant pipe is close to the one end of accuse temperature expansion tank is connected, the other end of second branch pipe with second coolant pipe is close to the one end of coolant liquid radiator unit's entry end is connected.
Optionally, the number of the temperature sensors is three, and the three temperature sensors are respectively arranged at the inlet end of the cooling liquid heat dissipation assembly, the outlet end of the cooling liquid heat dissipation assembly and the output end of the temperature control expansion water tank.
Optionally, the number of the electromagnetic valves is three, and the three electromagnetic valves are respectively arranged at the output end of the water pump, the second cooling liquid pipe and the branch pipeline.
Optionally, the pressure sensors are provided with seven, and the seven pressure sensors are respectively arranged at two ends of the cooling circuit of the tested battery pile, one end of the second cooling liquid pipe close to the inlet end of the cooling liquid heat dissipation assembly, two ends of the water pump and two ends of the deionizer.
Optionally, the flow sensors are provided in two, and the two flow sensors are respectively provided on a second cooling liquid pipe parallel to the branch pipeline and on one end of the second cooling liquid pipe close to the inlet end of the cooling liquid heat dissipation assembly.
Optionally, the cooling liquid heat dissipation assembly includes a heat dissipation water tank and a heat dissipation fan, and the heat dissipation fan is disposed on one side of the heat dissipation water tank; and a blower fan is arranged on the other side of the heat dissipation water tank.
Optionally, the online conductivity tester further comprises a control unit, and the control unit is electrically connected with the water pump, the temperature control expansion water tank, the temperature sensor, the pressure sensor, the electromagnetic valve, the flow sensor, the deionizer and the online conductivity tester.
The invention provides a cooling loop testing device of a fuel cell for an automobile, which has the beneficial effects that:
1. the device can simulate the vehicle-mounted environment, ensure that the test environment is similar to the vehicle-mounted environment, improve the test accuracy, realize the test of various parameters of the cooling circuit of the fuel cell through the arrangement of various sensors, deionizers and conductivity online testers, ensure that the performance of the cooling circuit of the fuel cell reaches the standard, and avoid the fuel cell faults and potential safety hazards caused by the fact that all parts of the cooling circuit of the fuel cell are directly loaded on the vehicle and are not subjected to the test;
2. the device integrates the tests of various parameters on the same test device, forms modularized control, can perform independent tests of different parameters under different conditions through the cooperation among various sensors, can also perform simultaneous tests of a plurality of parameters through the cooperation among various sensors, and is flexible in test;
3. the device can simulate real vehicle-mounted working conditions through the arrangement of the cooling liquid heat dissipation assembly, the water pump, the pile cooling loop simulation module and the temperature control expansion water tank, tests under the simulated real vehicle-mounted working conditions, and realizes accurate evaluation of relevant performance parameters of the fuel cell cooling loop;
4. the cooling liquid heat radiation component, the water pump, the pile cooling loop simulation module and the temperature sensor of the device can be partially or completely used as a tested object, when one or more parts are tested, other parts can be replaced by standard parts, and the testing range of the device is wide;
5. the device integrates various sensors, deionizers, conductivity online testers and a plurality of electromagnetic valves in the same test loop, can combine the test function with the post-treatment function, and can directly implement and evaluate the post-treatment process of the cooling loop;
6. the device sets up pile cooling circuit simulation module as being surveyed electric pile cooling circuit, and pile cooling circuit simulation module is through adopting the runner that the guide plate that the material is the same with the metal bipolar plate of real fuel cell formed, fully simulates the actual cooling circuit ion release condition, also can realize the pressure drop similar with actual cooling circuit, makes the simulation result more close to actual value.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
Fig. 1 is a schematic configuration diagram showing a cooling circuit testing apparatus for a fuel cell for an automobile according to an embodiment of the present invention.
Fig. 2 is a schematic front view showing a stack cooling circuit simulation module of a cooling circuit testing apparatus for a fuel cell for an automobile according to an embodiment of the present invention.
Fig. 3 is a schematic side view showing a stack cooling circuit simulation module of a cooling circuit testing apparatus for a fuel cell for an automobile according to an embodiment of the present invention.
Fig. 4 shows a schematic sectional structure view of the direction a of fig. 2.
Description of reference numerals:
1. a coolant heat sink assembly; 2. a first coolant tube; 3. a second coolant tube; 4. a tested galvanic pile cooling loop; 5. a water pump; 6. a temperature control expansion water tank; 7. a temperature sensor; 8. a pressure sensor; 9. a flow sensor; 10. an electromagnetic valve; 11. a deionizer; 12. an on-line conductivity tester; 13. a housing; 14. a baffle; 15. a first branch pipe; 16. a second branch pipe; 17. a heat radiation water tank; 18. a heat radiation fan; 19. a blower fan; 71. a first temperature sensor; 72. a second temperature sensor; 73. a third temperature sensor; 81. a first pressure sensor; 82. a second pressure sensor; 83. a third pressure sensor; 84. a fourth pressure sensor; 85. a fifth pressure sensor; 86. a sixth pressure sensor; 87. a seventh pressure sensor; 91. a first flow sensor; 92. a second flow sensor; 101. a first solenoid valve; 102. a second solenoid valve; 103. and a third solenoid valve.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The invention provides a cooling circuit testing device of a fuel cell for an automobile, comprising:
a coolant heat sink assembly;
the device comprises a first cooling liquid pipe and a second cooling liquid pipe, wherein one end of the first cooling liquid pipe and one end of the second cooling liquid pipe are respectively connected with the outlet end and the inlet end of a cooling liquid radiating assembly, the other end of the first cooling liquid pipe and the other end of the second cooling liquid pipe are respectively used for connecting the cooling liquid input end and the cooling liquid output end of a cooling loop of the tested electric pile, a water pump is arranged on the first cooling liquid pipe, and the cooling liquid radiating assembly, the water pump and the cooling loop of the tested electric pile are connected through the first cooling liquid pipe and the second cooling liquid pipe to form a test loop;
the temperature control expansion water tank is arranged on the test loop;
the temperature sensors and the pressure sensors are respectively used for measuring the temperature and the pressure of the cooling liquid at different positions in the test circuit;
a plurality of flow sensors for measuring coolant flow at different locations in the test loop;
a plurality of solenoid valves for controlling the flow of the cooling fluid in the test loop;
the deionizer is connected to the second cooling liquid pipe through a branch pipeline;
and the conductivity online tester is arranged on the first cooling liquid pipe.
Specifically, the existing test bench can only test the heat dissipation performance of the cooling liquid heat dissipation assembly, but cannot reflect other key parameters which are crucial to the normal operation of the fuel cell, such as ion precipitation rate, stability, resistance and the like in a cooling loop of the whole fuel cell, and the cooling loop of the existing vehicle-mounted fuel cell cannot test the parameters before loading, so that the frequency after loading fails, and even the fuel cell stack is damaged seriously, thereby causing huge loss; the testing device is designed for effectively testing relevant parameters of the whole cooling circuit except for the heat radiation performance of a cooling liquid heat radiation assembly of the fuel cell, is used for testing the cooling circuit before the cooling circuit is carried on a vehicle, can simulate the vehicle-mounted environment, can test key parameters of the cooling circuit such as heat radiation capacity, conductivity, power consumption, flow resistance and reliability aiming at the special requirements of the fuel cell, fully knows the working performance of the cooling circuit of the fuel cell through testing, finds possible problems in the working process in advance, avoids a series of hidden dangers and problems caused after the cooling circuit is carried on the vehicle, and has great significance for guaranteeing the normal operation of the fuel cell.
Furthermore, the deionizer is connected with the branch pipeline to form a test branch parallel to the second cooling liquid pipe, and for each test part arranged on the test loop and the test path, when different parameters are tested, a control variable method is adopted to control other parameters, for example, when the heat radiation performance of the cooling liquid heat radiation assembly is tested, other parts, sensors and the like can be tested by adopting standard parts with set standard parameters.
Optionally, the cooling loop of the tested electric pile is a pile cooling loop simulation module, the pile cooling loop simulation module includes a casing, two ends of the casing are respectively provided with a cooling liquid input end and a cooling liquid output end, a plurality of guide plates are arranged inside the casing, a cooling flow channel is formed between adjacent guide plates, and the material of the guide plates is the same as that of the metal bipolar plate of the fuel cell.
Specifically, the stack cooling loop simulation module can simulate the stack cooling loop of a real fuel cell, and when relevant parameters of the stack cooling loop are not tested, the stack cooling loop simulation module can be used for simulating the stack cooling loop of the real fuel cell, so that the cost is saved, and the test is convenient; when testing relevant parameters of the pile cooling circuit, the tested pile cooling circuit is connected into the testing circuit, and other components, sensors and the like can all adopt standard components with set parameters to carry out testing operation.
Furthermore, the stack cooling loop simulation module adopts a flow channel formed by a guide plate which is the same as the material and the flow channel structure of a metal bipolar plate of a real fuel cell, so that the ion release condition of the actual cooling loop is fully simulated, the pressure drop similar to that of the actual cooling loop can be realized, and the simulation result is closer to the actual value.
Optionally, the temperature control expansion water tank is arranged at one end, close to the coolant output end of the cooling loop of the tested pile, of the second coolant pipe, and the temperature rising assembly and the temperature lowering assembly are arranged inside the temperature control expansion water tank.
Specifically, the heating assembly and the cooling assembly are electrically connected with the control unit.
Optionally, the branch pipeline includes a first branch pipe and a second branch pipe, one end of the deionizer is connected with one end of the first branch pipe, the other end of the deionizer is connected with one end of the second branch pipe, the other end of the first branch pipe is connected with one end of the second cooling liquid pipe close to the temperature-controlled expansion water tank, and the other end of the second branch pipe is connected with one end of the second cooling liquid pipe close to the inlet end of the cooling liquid heat dissipation assembly.
Specifically, the first branch pipe, the deionizer and the second branch pipe are connected to form a testing branch, the testing branch and a testing loop where the second cooling liquid pipe is located form a parallel arrangement mode, whether the testing branch participates in testing or not can be controlled through the opening and closing of the electromagnetic valve, and the testing is flexible.
Optionally, the number of the temperature sensors is three, and the three temperature sensors are respectively arranged at the inlet end of the cooling liquid heat dissipation assembly, the outlet end of the cooling liquid heat dissipation assembly and the output end of the temperature control expansion water tank.
Specifically, first temperature sensor can test the temperature of the coolant liquid of accuse temperature expansion tank output, can test accuse temperature expansion tank's performance, and second, third temperature sensor can test coolant liquid radiator unit's exit end and the temperature of entry end coolant liquid respectively, realize testing coolant liquid radiator unit's performance through the contrast.
Furthermore, the arrangement positions of the sensors and the valve elements can be arranged according to the actual use requirement.
Optionally, the number of the electromagnetic valves is three, and the three electromagnetic valves are respectively arranged at the output end of the water pump, the second cooling liquid pipe and the branch pipeline.
Specifically, different resistance and flow conditions in the test loop and the test branch can be controlled by controlling the opening degrees of the three electromagnetic valves so as to meet the test requirements of different parameters.
Optionally, the pressure sensors are provided with seven, and the seven pressure sensors are respectively arranged at two ends of a cooling circuit of the tested electric pile, one end of the second cooling liquid pipe close to the inlet end of the cooling liquid heat dissipation assembly, two ends of the water pump and two ends of the deionizer.
Specifically, different pressure sensors can respectively test the pressure values of the cooling liquid at different positions in the test loop and the test branch, and the control variable method can be used for evaluating the performance parameters of different tested objects through the measurement values of the different pressure sensors.
Alternatively, two flow sensors are provided, the two flow sensors being provided on a second coolant pipe in parallel with the branch line and on an end of the second coolant pipe near the inlet end of the coolant heat dissipation assembly, respectively.
Specifically, two flow sensors are capable of measuring the coolant flow in the test loop and the test branch.
Optionally, the cooling liquid heat dissipation assembly includes a heat dissipation water tank and a heat dissipation fan, and the heat dissipation fan is disposed at one side of the heat dissipation water tank; and a blower fan is arranged on the other side of the heat dissipation water tank.
Specifically, the cooling liquid heat dissipation assembly consisting of the heat dissipation water tank and the heat dissipation fan can simulate the real cooling liquid heat dissipation assembly of the fuel cell, and the blower fan can be adjusted under the control of the control unit, so that the simulation of the air inlet of the automobile is realized, and the test result is more real and accurate.
Optionally, the device further comprises a control unit, and the control unit is electrically connected with the water pump, the temperature control expansion water tank, the temperature sensor, the pressure sensor, the electromagnetic valve, the flow sensor, the deionizer and the conductivity online tester.
Specifically, the control unit is an upper computer, the blower fan, the cooling liquid heat dissipation assembly, the water pump, the temperature control expansion water tank, the electromagnetic valve and the deionizer are connected with the upper computer and controlled by the upper computer, and a tester can execute corresponding test operation only by inputting corresponding test condition requirements; signals sent by the temperature sensor, the pressure sensor, the flow sensor and the conductivity on-line tester can be read, stored and displayed by an upper computer in real time, so that the tester can conveniently monitor and analyze the signals.
Examples
As shown in fig. 1 to 4, the present invention provides a cooling circuit testing apparatus for a fuel cell for an automobile, comprising:
a coolant heat sink assembly 1;
the testing device comprises a first cooling liquid pipe 2 and a second cooling liquid pipe 3, wherein one end of the first cooling liquid pipe 2 and one end of the second cooling liquid pipe 3 are respectively connected with the outlet end and the inlet end of a cooling liquid heat dissipation assembly 1, the other end of the first cooling liquid pipe 2 and the other end of the second cooling liquid pipe 3 are respectively used for connecting the cooling liquid input end and the cooling liquid output end of a tested electric pile cooling loop 4, a water pump 5 is arranged on the first cooling liquid pipe 2, and the cooling liquid heat dissipation assembly 1, the water pump 5 and the tested electric pile cooling loop 4 are connected through the first cooling liquid pipe 2 and the second cooling liquid pipe 3 to form a testing loop;
the temperature control expansion water tank 6 is arranged on the test loop;
a plurality of temperature sensors 7 and a plurality of pressure sensors 8 for measuring the temperature and pressure of the coolant at different positions in the test circuit, respectively;
a plurality of flow sensors 9 for measuring the flow of coolant at different locations in the test circuit;
a plurality of solenoid valves 10 for controlling the flow of the cooling liquid in the test circuit;
a deionizer 11 connected to the second coolant pipe 3 through a branch line;
and an in-line conductivity tester 12 disposed on the first cooling liquid pipe 2.
In this embodiment, the measured galvanic pile cooling circuit 4 is a galvanic pile cooling circuit simulation module, the galvanic pile cooling circuit simulation module includes a housing 13, two ends of the housing 13 are respectively provided with a cooling liquid input end and a cooling liquid output end, a plurality of flow guide plates 14 are arranged inside the housing 13, a cooling flow channel is formed between adjacent flow guide plates, and the material of the flow guide plates 14 is the same as that of the metal bipolar plate of the fuel cell.
In this embodiment, the temperature-control expansion water tank 6 is arranged at one end of the second cooling liquid pipe 3 close to the cooling liquid output end of the cooling circuit 4 of the tested pile, and the temperature-raising component and the temperature-lowering component are arranged inside the temperature-control expansion water tank 6.
In this embodiment, the branch pipeline includes first branch pipe 15 and second branch pipe 16, and the one end of deionization 11 ware is connected with the one end of first branch pipe 15, and the other end of deionization 11 ware is connected with the one end of second branch pipe 16, and the other end of first branch pipe 15 is connected near the one end of accuse temperature expansion tank 6 with second coolant pipe 3, and the other end of second branch pipe 16 is connected with the one end that second coolant pipe 3 is close to the entry end of coolant liquid radiator unit 1.
In this embodiment, three temperature sensors 7 are provided, and the three temperature sensors 7 are respectively disposed at the inlet end of the cooling liquid heat dissipation assembly 1, the outlet end of the cooling liquid heat dissipation assembly 1, and the output end of the temperature control expansion water tank 6.
In the present embodiment, three electromagnetic valves 10 are provided, and the three electromagnetic valves 10 are respectively provided on the output end of the water pump 5, the second coolant pipe 3, and the branch lines.
In the present embodiment, seven pressure sensors 8 are provided, and the seven pressure sensors 8 are respectively provided at two ends of the measured electrode stack cooling circuit 4, one end of the second cooling liquid pipe 3 near the inlet end of the cooling liquid heat dissipation assembly 1, two ends of the water pump 5, and two ends of the deionizer 11.
In the present embodiment, the flow sensors 9 are provided in two, and the two flow sensors 9 are respectively provided on the second cooling liquid pipe 3 in parallel with the branch lines and on an end of the second cooling liquid pipe 3 near the inlet end of the cooling liquid heat dissipation assembly 1.
In the present embodiment, the coolant heat dissipation assembly 1 includes a heat dissipation water tank 17 and a heat dissipation fan 18, the heat dissipation fan 18 being disposed at one side of the heat dissipation water tank 17; the other side of the heat radiating water tank 17 is provided with a blower fan 19.
In this embodiment, the online conductivity tester further comprises a control unit, and the control unit is electrically connected with the water pump 5, the temperature control expansion water tank 6, the temperature sensor 7, the pressure sensor 8, the electromagnetic valve 10, the flow sensor 9, the deionizer 11 and the online conductivity tester 12.
In summary, the cooling loop testing device for the fuel cell for the vehicle provided by the present invention can achieve multiple functions when in use, in this embodiment, the temperature sensor 7 disposed on the output end of the temperature-controlled expansion water tank 6 is the first temperature sensor 71, and the temperature sensors 7 disposed on the inlet end and the outlet end of the cooling liquid heat dissipation assembly 1 are the second temperature sensor 72 and the third temperature sensor 73, respectively; the electromagnetic valve 10 arranged on the output end of the water pump 5 is a first electromagnetic valve 101, the battery valve 10 arranged on the second cooling liquid pipe 3 is a second electromagnetic valve 102, the battery valve 10 arranged on the branch pipeline is a third electromagnetic valve 103, and a first branch pipe 15 where the third electromagnetic valve 103 is located and the second cooling liquid pipe 3 where the second electromagnetic valve 102 is located are arranged in parallel; the pressure sensors 8 arranged at the cooling liquid input end and the cooling liquid output end of the tested galvanic pile cooling circuit 4 are respectively a first pressure sensor 81 and a second pressure sensor 82, the pressure sensor 8 arranged at one end of the second cooling liquid pipe 3 close to the inlet end of the cooling liquid heat dissipation assembly 1 is a third pressure sensor 83, the pressure sensors 8 arranged at the input end and the output end of the water pump 5 are respectively a fourth pressure sensor 84 and a fifth pressure sensor 85, and the pressure sensors 8 arranged at the input end and the output end of the deionizer 11 are respectively a sixth pressure sensor 86 and a seventh pressure sensor 87; the flow sensor 9 provided on the second coolant pipe 3 in parallel with the branch pipe is a first flow sensor 91, and the flow sensor 8 provided on one end of the inlet end of the coolant heat dissipation assembly 1 is a second flow sensor 92; the specific functions and implementation methods are as follows:
1. the cooling liquid heat radiation component 1 has a heat radiation capability test function;
during testing, the water pump 5 and the temperature-controlled expansion water tank 6 are controlled to realize different temperature, flow speed and other conditions of the cooling liquid, the opening degrees of the first electromagnetic valve 101, the second electromagnetic valve 102 and the third electromagnetic valve 103 are controlled to realize different resistance and flow conditions, the rotating speed of the blast fan 19 is controlled to simulate the air intake of one side of the heat-radiating water tank 17 at different speeds, and the evaluation of the heat-radiating capacity of the cooling liquid heat-radiating assembly 1 can be completed by comprehensively comparing the temperature difference measured by the second temperature sensor 72 and the third temperature sensor 73 with the flow measured by the second flow sensor 92;
2. a cooling liquid circulation conductivity test function/deionization capability test function of the deionizer 11 of the cooling liquid heat dissipation assembly 1;
during testing, the water pump 5 and the temperature control expansion water tank 6 are controlled to realize different temperature, flow speed and other conditions of the cooling liquid, the opening degrees of the first electromagnetic valve 101, the second electromagnetic valve 102 and the third electromagnetic valve 103 are controlled to realize different resistance and flow conditions, and the evaluation on the circulating conductivity of the cooling liquid can be realized by reading and recording the numerical value of the conductivity online tester 12 in real time; meanwhile, the change situation of the conductivity before and after the deionizer 11 is connected can be observed, and the deionization capacity evaluation of the deionizer 11 is completed; a cooling liquid sample is directly taken from the temperature-controlled expansion water tank 6, so that the composition analysis of the conductive particles of the cooling liquid can be conveniently carried out, and the ionic composition of the cooling liquid can be visually reflected;
3. the working capacity test function of the water pump 5;
during testing, the opening degrees of the first electromagnetic valve 101, the second electromagnetic valve 102 and the third electromagnetic valve 103 are controlled to realize different resistance and flow conditions, and the pressure rise, the flow and other parameters of the water pump 5 under different working conditions can be tested by reading the pressure value change measured by the fourth pressure sensor 84 and the fifth pressure sensor 85 and the flow value change measured by the second flow sensor 92;
4. a cooling loop piezoresistive testing function;
during testing, the water pump 5 and the temperature control expansion water tank 6 are controlled to realize different temperature, flow speed and other conditions of the cooling liquid, the opening degrees of the first electromagnetic valve 101, the second electromagnetic valve 102 and the third electromagnetic valve 103 are controlled to realize different resistance and flow conditions, and the piezoresistive parameters of the whole cooling loop are evaluated by reading and comparing the numerical values of the first pressure sensor, the second pressure sensor, the third pressure sensor and the seventh pressure sensor;
5. testing the service life of the deionizer 11;
during testing, the water pump 5 and the temperature control expansion water tank 6 are controlled to realize different temperature, flow speed and other conditions of the cooling liquid, the opening degrees of the second electromagnetic valve 102 and the third electromagnetic valve 103 are controlled to realize the control of the flow of the cooling liquid flowing through the deionizer, and the working performance and attenuation condition of the deionizer 11 are evaluated by reading and comparing the numerical values of the sixth pressure sensor 86 and the seventh pressure sensor 87 and the change condition of the conductivity online tester;
6. the pressure resistance test, the sealing detection and the ion release rate detection of the stack cooling loop of the fuel cell are carried out;
during testing, the water pump 5 and the temperature control expansion water tank 6 are controlled to realize different temperature, flow speed and other conditions of cooling liquid, the opening degrees of the first electromagnetic valve 101, the second electromagnetic valve 102 and the third electromagnetic valve 103 are controlled to realize different resistance and flow conditions, and the pressure resistance and ion release rate performance of a stack cooling loop of a fuel cell are evaluated by reading and comparing the numerical values of the first pressure sensor 81 and the second pressure sensor 82 and the change condition of an electric conductivity on-line tester; meanwhile, the tightness of a cooling loop 4 of the tested galvanic pile is evaluated by observing the water seepage condition among all paths in the galvanic pile;
7. a cooling loop deionization process verification function of the fuel cell;
adding different reagents into the temperature-controlled expansion water tank 6, and evaluating the deionization process effects of different cooling loops by comparing the conductivity measured values of the conductivity on-line tester 12 under different working conditions; the device can also be directly used for the implementation of the deionization treatment process of the cooling loop, and the ion eduction rate of the device is reduced by adding corresponding fluid to react with the ions or the surfaces of components in the cooling loop, thereby meeting the requirement of low conductivity.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (6)
1. A cooling circuit testing device for a fuel cell for an automobile, characterized by comprising:
a coolant heat sink assembly;
one end of the first cooling liquid pipe and one end of the second cooling liquid pipe are respectively connected with the outlet end and the inlet end of the cooling liquid heat dissipation assembly, the other end of the first cooling liquid pipe and the other end of the second cooling liquid pipe are respectively used for being connected with a cooling liquid input end and a cooling liquid output end of a cooling circuit of the tested electric pile, a water pump is arranged on the first cooling liquid pipe, and the cooling liquid heat dissipation assembly, the water pump and the cooling circuit of the tested electric pile are connected through the first cooling liquid pipe and the second cooling liquid pipe to form a testing circuit;
the temperature control expansion water tank is arranged on the test loop;
a plurality of temperature sensors and a plurality of pressure sensors for measuring the temperature and pressure of the cooling fluid at different locations in the test circuit, respectively;
a plurality of flow sensors for measuring coolant flow at different locations in the test loop;
a plurality of solenoid valves for controlling the flow of the cooling fluid in the test loop;
a deionizer connected to the second cooling liquid pipe through a branch pipe;
the conductivity online tester is arranged on the first cooling liquid pipe;
the three temperature sensors are respectively arranged at the inlet end of the cooling liquid heat dissipation assembly, the outlet end of the cooling liquid heat dissipation assembly and the output end of the temperature control expansion water tank;
the number of the electromagnetic valves is three, and the three electromagnetic valves are respectively arranged at the output end of the water pump, the second cooling liquid pipe and the branch pipeline;
the seven pressure sensors are respectively arranged at two ends of a cooling circuit of the tested electric pile, one end of the second cooling liquid pipe close to the inlet end of the cooling liquid heat dissipation assembly, two ends of the water pump and two ends of the deionizer;
the flow sensors are arranged in two numbers, and the two flow sensors are respectively arranged on a second cooling liquid pipe parallel to the branch pipeline and one end, close to the inlet end of the cooling liquid heat dissipation assembly, of the second cooling liquid pipe.
2. The cooling circuit testing device of the fuel cell for the automobile as claimed in claim 1, wherein the tested stack cooling circuit is a stack cooling circuit simulation module, the stack cooling circuit simulation module includes a housing, the cooling liquid input end and the cooling liquid output end are respectively disposed at two ends of the housing, a plurality of flow deflectors are disposed inside the housing, a cooling flow channel is formed between adjacent flow deflectors, and the material of the flow deflectors is the same as that of the metal bipolar plate of the fuel cell.
3. The cooling circuit testing device of the fuel cell for the automobile according to claim 1, wherein the temperature-controlled expansion water tank is arranged at one end of the second cooling liquid pipe close to the cooling liquid output end of the cooling circuit of the tested electric pile, and a temperature-raising component and a temperature-lowering component are arranged inside the temperature-controlled expansion water tank.
4. The cooling circuit testing device of the fuel cell for the automobile as claimed in claim 3, wherein the branch line includes a first branch pipe and a second branch pipe, one end of the deionizer is connected to one end of the first branch pipe, the other end of the deionizer is connected to one end of the second branch pipe, the other end of the first branch pipe is connected to one end of the second cooling liquid pipe close to the temperature-controlled expansion tank, and the other end of the second branch pipe is connected to one end of the second cooling liquid pipe close to the inlet end of the cooling liquid heat dissipation assembly.
5. The cooling circuit testing device of a fuel cell for an automobile as set forth in claim 1, wherein said coolant heat-radiating member includes a heat-radiating water tank and a heat-radiating fan provided at one side of said heat-radiating water tank; and a blower fan is arranged on the other side of the heat dissipation water tank.
6. The cooling circuit testing device of the fuel cell for the automobile as claimed in claim 1, further comprising a control unit electrically connected to the water pump, the temperature-controlled expansion tank, the temperature sensor, the pressure sensor, the solenoid valve, the flow sensor, the deionizer, and the conductivity online tester.
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| CN202110090644.4A CN112928304B (en) | 2021-01-22 | 2021-01-22 | Cooling loop testing device of fuel cell for automobile |
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| CN202110090644.4A CN112928304B (en) | 2021-01-22 | 2021-01-22 | Cooling loop testing device of fuel cell for automobile |
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| CN114937797B (en) * | 2022-05-31 | 2024-04-12 | 中国第一汽车股份有限公司 | Control method of intercooler cleaning system, cleaning system and electronic device |
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