CN211627683U - Automatic test system for contact resistance curve of bipolar plate of fuel cell - Google Patents
Automatic test system for contact resistance curve of bipolar plate of fuel cell Download PDFInfo
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- CN211627683U CN211627683U CN201922201520.XU CN201922201520U CN211627683U CN 211627683 U CN211627683 U CN 211627683U CN 201922201520 U CN201922201520 U CN 201922201520U CN 211627683 U CN211627683 U CN 211627683U
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Abstract
The utility model relates to a fuel cell bipolar plate contact resistance curved automatic test system, this system includes: the test control cabinet comprises a test table board and a controller; the testing component comprises an electrode for applying pressure to a testing sample, a pressure sensor for measuring the pressure between the electrode and the testing sample, and a digital multimeter for measuring the resistance between the electrode and the testing sample, wherein the electrode is fixed on the testing table and is driven to move along the vertical direction by an actuating mechanism, the pressure sensor is arranged on the electrode, and the positive electrode and the negative electrode of the digital multimeter are respectively and correspondingly connected with the electrode and the testing sample; the actuating mechanism is connected with the electrode and drives the electrode to move along the vertical direction; the adjustable support is used for fixing the actuating mechanism and adjusting the initial positions of the electrode and the actuating mechanism on the test table top, and the adjustable support is fixed on the test table top. Compared with the prior art, the utility model discloses can be simple and convenient, reliable, high-efficient, accurate, record fuel cell bipolar plate's contact resistance with high reproducibility.
Description
Technical Field
The utility model belongs to the technical field of fuel cell, especially, relate to a fuel cell bipolar plate contact resistance curved automatic test system.
Background
The fuel cell is a high-efficiency and environment-friendly power generation system for directly and continuously converting chemical energy into electric energy, and is a fourth power generation device following hydroelectric power, thermal power and nuclear power. The proton exchange membrane fuel cell has the advantages of long service life, high specific power and specific energy, high starting speed at room temperature and the like, can be used as a movable power supply and a fixed power supply, has wide application prospect in the fields of military affairs, traffic, communication and the like, and is considered to be one of ideal power sources meeting the requirements of future energy and environment. The bipolar plate is one of the core components of the proton exchange membrane fuel cell, occupies a large part of the mass and the cost of the cell group, and has the functions of uniformly distributing reaction gas, conducting current, connecting each monocell in series and the like. To meet these functional requirements, an ideal bipolar plate should have high thermal/electrical conductivity, corrosion resistance, low density, good mechanical properties, low cost, and easy processing. However, the bipolar plate produced at present has the problems of poor corrosion resistance and conductivity matching, high production cost, short service life and the like. The method realizes reasonable matching of the electrical conductivity and the corrosion resistance of the bipolar plate material, namely realizes high corrosion resistance on the premise of ensuring reasonable electrical conductivity, ensures the service life of the whole system, and is one of key links of fuel cell commercialization. The requirement for the conductivity test of the bipolar plate is more and more, and it is very important to efficiently and accurately obtain the contact resistance parameter of the bipolar plate by using a system test. Moreover, even if the stacks are assembled using exactly the same materials and components for different stack designs, the assembly forces may not be exactly the same; therefore, the variation curve of the contact resistance between the bipolar plate and the gas diffusion layer according to the assembly pressure is very important for the design of the stack, and has a great influence on the power generation performance and the service life of the stack.
The current patent for testing the contact resistance of fuel cell, for example, patent document CN101236221A is an electrical engineering method for testing the contact resistance between electrical connectors; the method tests the contact resistance between two metal pieces, and does not consider the contact resistance testing and data processing method under the condition of the existence of carbon paper; in addition, the method can only manually obtain contact resistance data under the influence of single pressure, cannot continuously test a plurality of pressure points, and does not meet the requirements of actual research and characterization of the contact resistance of the bipolar plate of the fuel cell.
Patent document CN109557375A is required for factory production and screening of bipolar plate products, and this patent can realize automatic pressurization test under a single pressure, automatically discriminate product quality according to test results, and perform screening placement, but does not consider a test and data processing method of contact resistance in the presence of carbon paper, and the test results will deviate from actual conditions far, and cannot perform continuous tests for multiple pressure points, and cannot well meet test requirements for trial-made samples in research and development.
The patent document CN207502614U is based on circuit breakers and disconnectors in high energy consumption industries such as electrolysis and metallurgy to solve the problem of contact resistance test of contacts, but is not directed to bipolar plate contact resistance test in the field of fuel cells, and needs to manually change pressure and is complicated to operate.
Patent document CN105572474A aims at accurately measuring the contact resistance of a large-area whole bipolar plate, and cannot meet the requirement of measuring the contact resistance of a small-area trial sample in research and development, and the device needs to be used in cooperation with an external press, which is cumbersome and cannot realize automatic measurement and recording.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to a system for automatically testing the contact resistance curve of a bipolar plate of a fuel cell, which overcomes the above-mentioned drawbacks of the prior art.
The purpose of the utility model can be realized through the following technical scheme:
an automatic test system for a contact resistance curve of a bipolar plate of a fuel cell, the system comprising:
testing the control cabinet: the device comprises a test table top for bearing a test sample and a controller for controlling the system to work;
test part: the electrode is fixed on a test table top and is driven to move along the vertical direction by an actuating mechanism, the pressure sensor is arranged on the electrode, and the positive electrode and the negative electrode of the digital multimeter are respectively correspondingly connected with the electrode and the test sample;
an executing mechanism: the actuating end is connected with an electrode, the electrode is driven to move along the vertical direction, and the pressure sensor is connected between the actuating end of the actuating mechanism and the electrode in series;
the adjustable support: the adjustable support is fixed on the test table top;
the pressure sensor, the digital multimeter and the actuating mechanism are all connected to the controller.
The test table comprises an insulation table body and an insulation base plate, wherein the insulation base plate is arranged on the insulation table body, and the insulation base plate is used for placing the test sample.
And a flexible insulator for buffering is connected in series between the electrode and the actuating mechanism.
The electrode comprises an electrode body, a connecting clamp and an adjustable clamp, wherein the connecting clamp is fixed at an actuating mechanism executing end through a clamp fastening screw, and the electrode body is detachably fixed on the connecting clamp through the adjustable clamp.
The actuating mechanism comprises a motor and an electric cylinder, the motor is connected with the electric cylinder, the output shaft of the electric cylinder is connected with the electrode, and the electric cylinder is fixed on the adjustable bracket.
But adjustable support include Z axle bracing piece and X axle bracing piece, Z axle support pole pass through Z axle fixer vertical fixation on test table face, X axle support pole be on a parallel with the setting of test table face, its middle part is connected through first adjustable connector and Z axle support pole, Z axle bracing piece can do the removal of level and vertical direction, an end of X axle bracing piece pass through the second adjustable connector and fix actuating mechanism.
The test control cabinet on be equipped with the control button that is used for switching over the shift knob of manual and automatic mode and manual control actuating mechanism operation, shift knob and control button all be connected to the controller.
The controller comprises a PLC controller.
Compared with the prior art, the utility model has the advantages of as follows:
(1) the utility model has the advantages that the testing process is fully automatic, the human error in the testing process is effectively reduced, and the repeatability is good;
(2) the measurement accuracy is high: the utility model utilizes the high-precision pressure sensor and carries out closed-loop control on the testing pressure, so that the pressure progress is very high; meanwhile, the advantage of high-frequency data acquisition of the digital multimeter is utilized to realize the acquisition of a plurality of data points under each pressure point, so that random errors are effectively reduced;
(3) continuous measurement of multiple pressure points: after the test sequence is set, the system automatically tests in sequence according to the sequence, each test point is ensured not to be repeated and not to be omitted, test results of multiple pressure points are output, and a user can conveniently compare and analyze the sizes of contact resistances under different pressure points.
Drawings
FIG. 1 is an axial view of the test system apparatus of the present invention;
FIG. 2 is a right side view of the test system apparatus of the present invention;
FIG. 3 is a front view of the test system apparatus of the present invention;
FIG. 4 is an axial view of the table top of the testing system of the present invention;
FIG. 5 is a left side view of the table top of the testing system of the present invention;
fig. 6 is a left side view of the electrode part of the testing system of the present invention;
figure 7 is an elevation view of an electrode portion of the test system of the present invention;
fig. 8 is a rear view of the test system apparatus of the present invention;
FIG. 9 is a block diagram of the design structure of the test system of the present invention;
fig. 10 is a wiring diagram of the test system of the present invention;
FIG. 11 is a graph showing the results of a multi-pressure point test performed by the test system for an aluminum bipolar plate without surface treatment;
FIG. 12 is a graph showing the results of a multi-pressure point test performed on a graphite bipolar plate by the test system of the present invention;
fig. 13 is a graph of the test results of multiple pressure points of the test system of the present invention for a stainless steel bipolar plate coated with TiN/Ag coating.
In the figure, 1 is an actuating mechanism, 2 is a testing component, 3 is an adjustable bracket, 4 is a testing control cabinet, 5 is an emergency stop button, 6 is a manual control downward moving button, 7 is a manual control upward moving button, 8 is a manual control speed switching button, 9 is a system error indicating lamp, 10 is a system normal indicating lamp, 11 is a manual/automatic mode switching button, 12 is a power main switch, 13 is a control and communication module, 14 is a digital multimeter, 15 is a universal wheel, 16 is a motor, 17 is an electric cylinder, 18 is a pressure sensor, 19 is a flexible insulator, 20 is an electrode, 21 is a testing sample, 22 is an insulating pad, 23 is an insulating table top, 24 is a Z-axis supporting rod, 25 is a first adjustable connector, 26 is an X-axis supporting rod, 27 is a second adjustable connector, 28 is a Z-axis fixer, 29 is a connecting clamp, 30 is a clamp fastening screw, 31 is an adjustable clamp, 32 is an electrode body, 33 is a lead fastening through hole, 34 is a power supply interface, 35 is a control communication interface, 36 is a data acquisition interface, 37 is a cabinet body, 41 is a gold-plated copper electrode, 42 is carbon paper, and 43 is a bipolar plate.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Note that the following description of the embodiments is merely an example of the nature, and the present invention is not intended to limit the application or the use thereof, and the present invention is not limited to the following embodiments.
Example 1
As shown in fig. 1 to 8, an automatic test system for a contact resistance curve of a bipolar plate of a fuel cell includes:
and (4) testing the control cabinet: comprises a test table for bearing a test sample 21 and a controller for controlling the operation of the system;
test part 2: the device comprises an electrode 20 for applying pressure to a test sample 21, a pressure sensor 18 for measuring the pressure between the electrode 20 and the test sample 21, and a digital multimeter 14 for measuring the resistance between the electrode 20 and the test sample 21, wherein the electrode 20 is fixed on a test table top and is driven by an actuating mechanism 1 to move along the vertical direction, the pressure sensor 18 is arranged on the electrode 20, the positive electrode and the negative electrode of the digital multimeter 14 are respectively and correspondingly connected with the electrode 20 and the test sample 21, and the electrode 20 is a gold-plated copper electrode in the embodiment;
the actuating mechanism 1: the actuating end is connected with an electrode 20, the driving electrode 20 moves along the vertical direction, and the pressure sensor 18 is connected between the actuating end of the actuating mechanism 1 and the electrode 20 in series;
the adjustable bracket 3: the adjustable electrode support is used for fixing the actuating mechanism 1 and adjusting the initial positions of the electrode 20 and the actuating mechanism 1 on the test table top, and the adjustable support 3 is fixed on the test table top;
The test table comprises an insulation table surface 23 body and an insulation backing plate 22, the insulation backing plate 22 is arranged on the insulation table surface 23 body, the insulation backing plate 22 is used for placing the test sample 21, the test electrode 20 and the test sample 21 are isolated from the external environment, and a passage between the positive electrode and the negative electrode of a test lead is ensured to be only between the electrode 20 and the test sample 21.
The flexible insulator 19 for buffering is connected in series between the electrode 20 and the actuating mechanism 1, and when the actuating mechanism 1 pressurizes the test sample 21, the flexible insulator 19 provides a buffer space for displacement, so that the closed-loop control precision and stability of pressure can be effectively improved.
The electrode 20 comprises an electrode body 32, a connecting clamp 29 and an adjustable clamp 31, wherein the connecting clamp 29 is fixed at the execution end of the execution mechanism 1 through a clamp fastening screw 30, the electrode body 32 is detachably fixed on the connecting clamp 29 through the adjustable clamp 31, and can be replaced by the electrode body 32 with required size, shape and material according to actual requirements, a lead fastening through hole 33 is reserved on the electrode body 32, and a bolt connecting hole is provided for tightly connecting a test lead and the electrode body 32.
The actuating mechanism 1 comprises a motor 16 and an electric cylinder 17, the motor 16 is connected with the electric cylinder 17, an output shaft of the electric cylinder 17 is connected with an electrode 20, and the electric cylinder 17 is fixed on the adjustable bracket 3.
The adjustable support comprises a Z-axis support rod 24 and an X-axis support rod 26, the Z-axis support rod is vertically fixed on the test table top through a Z-axis fixer 28, the X-axis support rod 26 is arranged parallel to the test table top, the middle part of the X-axis support rod is connected with the Z-axis support rod 24 through a first adjustable connector 25, the Z-axis support rod 24 can move in the horizontal direction and the vertical direction, and one end part of the X-axis support rod 26 is fixed on the actuating mechanism 1 through a second adjustable connector 27. The Z-axis holder 28, first adjustable connector 25 and second adjustable connector 27 are all pre-formed components, and the distance of the electrode 20 from the Z-axis support bar 24 and the test table top can be varied by adjusting the first adjustable connector 25 and second adjustable connector 27.
The controller includes the PLC controller, and the PLC controller has following function:
can realize the communication and control with the upper computer;
the displacement of the actuating mechanism 1 can be controlled, and the pressure of the actuating mechanism 1 is controlled in a closed loop manner;
there are two modes of manual control and automatic control;
there are two control modes, fast and slow;
the pressure data of the pressure sensor 18 and the resistance data of the digital multimeter 14 can be acquired simultaneously;
the current measuring mode and measuring range of the digital multimeter 14 can be set;
whether the current test system works normally or not can be detected, and corresponding indication is given.
The test control cabinet 4 comprises a cabinet body 37, universal wheels 15 are arranged at the bottom of the cabinet body 37, an emergency stop button 5, a manual control downward moving button 6, a manual control upward moving button 7, a manual control speed switching button 8, a system error indicating lamp 9, a system normal indicating lamp 10, a manual/automatic mode switching button 11, a power main switch 12 and a control and communication module 13 are arranged on the cabinet body 37, and the above components are all connected to the controller.
As shown in fig. 9, the utility model discloses test system design structure block diagram, this system includes 3 parts, be host computer software control system respectively, electrical control system and mechanical test frock, wherein mechanical test frock includes electrode 20 (for gilding copper electrode 20 in this embodiment), electrical control system is connected to host computer software control system, electrical control system includes PLC controller and the servo electric jar and the pressure sensor 18 of being connected with it, the motion of PLC controller control servo electric jar and the pressure data of gathering pressure sensor 18 feedback, pressure data feedback is to host computer software control system, host computer software control system acquires the resistance value of digital multimeter 14 measurement simultaneously.
The specific process of testing by adopting the automatic testing system for the contact resistance curve of the fuel cell bipolar plate of the utility model is as shown in fig. 10, and specifically comprises the following processes (1) to (7):
(1) placing the fuel cell bipolar plate to be tested on a test table, and aligning the position to be tested with the projection point of the electrode 20 on the insulating platform;
(2) the positive and negative leads of the digital multimeter 14 are correspondingly connected to the electrode 20 and the fuel cell bipolar plate through alligator clips;
(3) placing the cut carbon paper on a test point of the fuel cell bipolar plate, wherein the area of the carbon paper is larger than the projection area of the electrode 20 on the insulating platform;
(4) starting a controller, wherein the controller controls the actuating mechanism 1 to drive the electrode 20 to move downwards, the contact resistance value is collected and stored at each set pressure point, for a single pressure point, the contact resistance value is collected for multiple times at the pressure point, the maximum and minimum values are removed, then the average value is obtained, the contact resistance value at the pressure point is obtained and stored, thirty-two data points are collected in the embodiment, the maximum and minimum values in the thirty-two data points are removed, and the average value is obtained for the rest data points, so that the random error generated by the test can be effectively reduced;
(5) fitting to obtain a first pressure-contact resistance curve f after data acquisition of all pressure points is completedep-cp/cp-bp(x) Where x is a pressure sequence, fep-cp/cp-bp(x) A first contact resistance value;
(6) the pre-fitted carbon paper pressure intensity-contact resistance curve f is adjustedep-cp(x)，fep-cp(x) The contact resistance value of the carbon paper and the electrode 20;
(7) obtaining a contact resistance curve of the bipolar plate of the fuel cell:
fcp-bp(x)＝fep-cp/cp-bp(x)-fep-cp(x)，
wherein f iscp-bp(x) Is the contact resistance of the fuel cell bipolar plate and the carbon paper.
It is emphasized here that: after the first pressure-contact resistance curve is obtained in the above process (5), the first contact resistance value corresponding to the corresponding pressure point in the curve includes the bulk resistance R of the gold-plated copper electrode 41eAnd the contact resistance R between the gold-plated copper electrode 41 and the carbon paper 42e-cpThe volume resistance R of the carbon paper 42cpThe contact resistance R between the carbon paper 42 and the test specimen 21 (i.e., the bipolar plate 43 in FIG. 10)cp-bpAnd the bulk resistance R of test specimen 21bpAs shown in FIG. 10, in the actual test, R is due toe、RcpAnd RbpIs generally much smaller than Re-cpAnd Rcp-bpSo that R can be considered in the calculatione、RcpAnd RbpApproximately equal to 0 and only need to eliminate Re-cpResulting in test errors. Thus, R is eliminated by the above-mentioned (6) and (7)e-cpResulting in test errors. Specifically, test data are acquired: since the electrode 20 in this embodiment is the gold-plated copper electrode 41, the test is performed using a gold-plated copper plate as the test sample 21, and the contact resistance between the gold-plated copper electrode 41 and the carbon paper 42, which should have twice the resistance value, is obtained: 2Re-cpFurther, the contact resistance R between the gold-plated copper electrode 41 and the carbon paper 42 can be calculatede-cpFitting the data to obtain a fitting equation fep-cp(x)。
In this embodiment, the test sample 21 is an aluminum metal bipolar plate sample without surface treatment (the sample area is not smaller than the projection area of the gold-plated copper electrode 20 on the insulation platform), the test sample 21 is placed on the insulation platform, the test site is placed below the projection point of the gold-plated copper electrode 20, and the positive and negative electrodes of the wire are respectively connected to the gold-plated copper electrode 20 and the test sample 21 by a four-terminal-button connection method, and good contact is ensured. The carbon paper cut slightly larger than the boss at the top end of the gold-plated copper electrode 20 is placed on the bipolar plate, and the circle center of the carbon paper is placed below the projection point of the gold-plated copper electrode 20. And (4) starting the test software on the upper computer, and ensuring that the lower computer of the test system is well connected with the communication interface of the upper computer. And (3) starting testing system software in a computer, inputting the sample number, the coating number, the carbon paper model number, the resistance value fitting equation parameters of the carbon paper and the diameter (unit: mm) of the head of the testing electrode 20, setting a testing interval and interval step length, or manually importing a testing pressure point table to generate a testing sequence. Clicking the "automatic test" button, the device will run automatically. The gold-plated copper electrode 20 is moved downward by the drive of the electric cylinder 17, and the resistance value is held and collected at each set pressure point, and the collected resistance value is plotted in a map of a software interface, and data is recorded. And after the data acquisition of all the pressure points is finished, automatically fitting a pressure-contact resistance curve according to the data obtained by testing, and giving parameters of a fitting equation. And any pressure point can be conveniently selected in the whole test interval to obtain the corresponding contact resistance value. After the test is finished, the gold-plated copper electrode 20 is reset to the initial position to wait for the next test. All the parameters set in the test items, the test data, the fitted equations will be recorded in the data file and exported to the table file with the format of.csv. The test results in this example are shown in FIG. 11.
Example 2
The automatic testing system and method for the contact resistance curve of the fuel cell bipolar plate in this embodiment are the same as those in embodiment 1, the test sample in this embodiment is a graphite bipolar plate, the test result is shown in fig. 12, and the specific testing method is as follows:
placing a graphite bipolar plate sample to be tested (the sample area is not less than the projection area of a gold-plated copper electrode on an insulation platform) on the insulation platform, placing a test site below the projection point of the gold-plated copper electrode, and respectively connecting the positive electrode and the negative electrode of a lead on the gold-plated copper electrode and the test sample by using a four-terminal button connection method to ensure good contact. The carbon paper which is cut to be slightly larger than the lug boss at the top end of the gold-plated copper electrode is placed on the bipolar plate, and the circle center of the carbon paper is placed below the projection point of the gold-plated copper electrode. And (4) starting the test software on the upper computer, and ensuring that the lower computer of the test system is well connected with the communication interface of the upper computer. And (3) starting testing system software in a computer, inputting the number of a currently tested sample, the number of a coating, the type of the carbon paper, the parameter of a resistance value fitting equation of the carbon paper and the diameter (unit: mm) of a testing electrode tip, setting a testing interval and an interval step length, or manually introducing a testing pressure point table to generate a testing sequence. Clicking the "automatic test" button, the device will run automatically. The gold-plated copper electrode is driven by the electric cylinder to move downwards, the resistance value is kept and collected at each set pressure point, the collected resistance value is drawn in a graph of a software interface, and data are recorded. And after the data acquisition of all the pressure points is finished, automatically fitting a pressure-contact resistance curve according to the data obtained by testing, and giving parameters of a fitting equation. And any pressure point can be conveniently selected in the whole test interval to obtain the corresponding contact resistance value. And after the test is finished, the gold-plated copper electrode is reset to the initial position to wait for the next test. All the parameters set in the test items, the test data, the fitted equations will be recorded in the data file and exported to the table file with the format of.csv.
Example 3
The automatic testing system and method for the contact resistance curve of the fuel cell bipolar plate in this embodiment are the same as those in embodiment 1, the test sample in this embodiment is a stainless steel bipolar plate with a TiN/Ag coating on the surface, the test result is shown in fig. 13, and the specific testing method is as follows: placing a stainless steel bipolar plate sample (the sample area is not less than the projection area of a gold-plated copper electrode on an insulation platform) with a TiN/Ag coating on the surface to be tested on the insulation platform, placing a test site below the projection point of the gold-plated copper electrode, and respectively connecting the positive electrode and the negative electrode of a lead on the gold-plated copper electrode and the test sample by using a four-terminal button connection method to ensure good contact. The carbon paper which is cut to be slightly larger than the lug boss at the top end of the gold-plated copper electrode is placed on the bipolar plate, and the circle center of the carbon paper is placed below the projection point of the gold-plated copper electrode. And (4) starting the test software on the upper computer, and ensuring that the lower computer of the test system is well connected with the communication interface of the upper computer. And (3) starting testing system software in a computer, inputting the number of a currently tested sample, the number of a coating, the type of the carbon paper, the parameter of a resistance value fitting equation of the carbon paper and the diameter (unit: mm) of a testing electrode tip, setting a testing interval and an interval step length, or manually introducing a testing pressure point table to generate a testing sequence. Clicking the "automatic test" button, the device will run automatically. The gold-plated copper electrode is driven by the electric cylinder to move downwards, the resistance value is kept and collected at each set pressure point, the collected resistance value is drawn in a graph of a software interface, and data are recorded. And after the data acquisition of all the pressure points is finished, automatically fitting a pressure-contact resistance curve according to the data obtained by testing, and giving parameters of a fitting equation. And any pressure point can be conveniently selected in the whole test interval to obtain the corresponding contact resistance value. And after the test is finished, the gold-plated copper electrode is reset to the initial position to wait for the next test. All the parameters set in the test items, the test data, the fitted equations will be recorded in the data file and exported to the table file with the format of.csv.
To sum up, the utility model discloses can be simple and convenient, reliable, high-efficient, accurate, the high reproducibility ground record the contact resistance of fuel cell bipolar plate unilateral.
The above embodiments are merely examples and do not limit the scope of the present invention. These embodiments may be implemented in other various manners, and various omissions, substitutions, and changes may be made without departing from the technical spirit of the present invention.
Claims (8)
1. An automatic test system for a contact resistance curve of a bipolar plate of a fuel cell, the system comprising:
test control cabinet (4): comprises a test table for carrying a test sample (21) and a controller for controlling the operation of the system;
test part (2): the device comprises an electrode (20) for applying pressure to a test sample (21), a pressure sensor (18) for measuring the pressure between the electrode (20) and the test sample (21), and a digital multimeter (5) for measuring the resistance between the electrode (20) and the test sample (21), wherein the electrode (20) is fixed on a test table top and is driven to move along the vertical direction by an actuating mechanism (1), the pressure sensor (18) is arranged on the electrode (20), and the positive electrode and the negative electrode of the digital multimeter (5) are respectively and correspondingly connected with the electrode (20) and the test sample (21);
actuator (1): the actuating end is connected with an electrode (20), the driving electrode (20) moves along the vertical direction, and the pressure sensor (18) is connected between the actuating end of the actuating mechanism (1) and the electrode (20) in series;
adjustable support (3): the adjustable support (3) is fixed on the test table top and used for fixing the actuating mechanism (1) and adjusting the initial positions of the electrode (20) and the actuating mechanism (1) on the test table top;
the pressure sensor (18), the digital multimeter (5) and the actuating mechanism (1) are all connected to the controller.
2. The system for automatically testing the contact resistance curve of the fuel cell bipolar plate as set forth in claim 1, wherein the test table comprises an insulating table body (23) and an insulating pad (22), the insulating pad (22) is disposed on the insulating table body (23), and the insulating pad (22) is used for placing the test specimen (21).
3. The automatic test system for the contact resistance curve of the fuel cell bipolar plate according to claim 1, characterized in that a flexible insulator (19) for buffering is connected in series between the electrode (20) and the actuator (1).
4. The automatic test system for the contact resistance curve of the fuel cell bipolar plate as claimed in claim 1, wherein the electrode (20) comprises an electrode body (32), a connecting clamp (29) and an adjustable clamp (31), the connecting clamp (29) is fixed on the execution end of the execution mechanism (1) through a clamp fastening screw (30), and the electrode body (32) is detachably fixed on the connecting clamp (29) through the adjustable clamp (31).
5. The system for automatically testing the contact resistance curve of the fuel cell bipolar plate according to claim 1, wherein the actuating mechanism (1) comprises an electric motor (16) and an electric cylinder (17), the electric motor (16) is connected with the electric cylinder (17), the output shaft of the electric cylinder (17) is connected with the electrode (20), and the electric cylinder (17) is fixed on the adjustable bracket (3).
6. The automatic test system for the contact resistance curve of the fuel cell bipolar plate as claimed in claim 1, wherein the adjustable support (3) comprises a Z-axis support bar (24) and an X-axis support bar (26), the Z-axis support bar is vertically fixed on the test table by a Z-axis fixer (28), the X-axis support bar (26) is arranged parallel to the test table, the middle part of the X-axis support bar is connected with the Z-axis support bar (24) by a first adjustable connector (25), the Z-axis support bar (24) can move horizontally and vertically, and one end part of the X-axis support bar (26) is fixed on the actuator (1) by a second adjustable connector (27).
7. The automatic test system for the contact resistance curve of the fuel cell bipolar plate as claimed in claim 1, wherein the test control cabinet (4) is provided with a switching button for switching between a manual mode and an automatic mode and a control button for manually controlling the operation of the actuator (1), and the switching button and the control button are both connected to a controller.
8. The system of claim 1, wherein the controller comprises a PLC controller.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112630537A (en) * | 2021-01-15 | 2021-04-09 | 葛华林 | Resistor batch detection system and application method thereof |
| CN113267730A (en) * | 2021-04-30 | 2021-08-17 | 广汽本田汽车有限公司 | Power battery detection method, system, device and medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112630537A (en) * | 2021-01-15 | 2021-04-09 | 葛华林 | Resistor batch detection system and application method thereof |
| CN113267730A (en) * | 2021-04-30 | 2021-08-17 | 广汽本田汽车有限公司 | Power battery detection method, system, device and medium |
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