CN112393706A - Fuel cell bipolar plate thickness measuring device and method - Google Patents
Fuel cell bipolar plate thickness measuring device and method Download PDFInfo
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- CN112393706A CN112393706A CN202011130850.5A CN202011130850A CN112393706A CN 112393706 A CN112393706 A CN 112393706A CN 202011130850 A CN202011130850 A CN 202011130850A CN 112393706 A CN112393706 A CN 112393706A
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- pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/08—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
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- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention belongs to the field of fuel cells, and particularly relates to a fuel cell bipolar plate thickness measuring device and a thickness measuring method. The invention adopts the following technical scheme: the fuel cell bipolar plate thickness measuring device comprises a monitoring system, a cylinder, a high-precision thickness measuring sensor, a thickness measuring platform, a pressure dividing system, a pressure relief device and instrument gas pipelines of all parts. The invention adopts a mode that the air cylinder drives the pressure head, simulates the practical application environment of the fuel cell bipolar plate by adjusting different pressures, and then carries out high-precision measurement on the thickness of the fuel cell bipolar plate under different stress conditions by matching with a corresponding high-precision sensor and a monitoring system.
Description
Technical Field
The invention belongs to the field of fuel cells, and particularly relates to a fuel cell bipolar plate thickness measuring device and a thickness measuring method.
Background
The object thickness measuring system is applied to many fields, for example, steel thickness measuring system, bipolar plate thickness measuring system, film thickness measuring system etc. the sample is because material pressure contact surface is different at the thickness measuring in-process, some deformations can take place for being indispensable, so need adjust the pressure of test head according to the material of the sample of being surveyed and the practical application condition of the sample of being surveyed in the testing process, accurate simulation is surveyed the application of sample occasion, the thickness of the sample of being surveyed of accurate measurement.
For an object with low pressure bearing capacity, due to the fact that the hardness of the material is low, the sample can be deformed due to large applied force, and the material can be damaged seriously. Especially graphite material's bipolar plate, the material is more fragile, and the bearing capacity is weak, and the thickness measurement needs pressure as little as possible, and the test head can compress tightly bipolar plate and avoid pressure too big bipolar plate deformation or damage that leads to again, in addition, because manual compressing tightly the object, can't guarantee that the power degree of exerting is stable unchangeable, will take place shake, tired scheduling problem along with time lapse. Therefore, how to ensure the accuracy and safety of the test is a technical problem to be solved urgently in the field.
Secondly, the traditional thickness measurement mode has insufficient measurement accuracy and can not measure the actual thickness of the fuel cell bipolar plate under the stress condition.
Disclosure of Invention
In order to solve the problems, the invention provides a fuel cell bipolar plate thickness measuring device and a thickness measuring method.
In order to achieve the purpose, the invention adopts the following technical scheme:
the fuel cell bipolar plate thickness measuring device comprises a monitoring system, a cylinder, a high-precision thickness measuring sensor, a thickness measuring platform, a pressure dividing system, a pressure relief device and instrument gas pipelines of all parts.
The monitoring system is respectively electrically connected with the thickness measuring device PLC and the high-precision thickness measuring sensor; controlling and monitoring the thickness measuring device and the sensor in real time, and outputting a test result;
the high-precision thickness measuring sensor is connected with the pressure head, the pressure head acts to drive the high-precision thickness measuring sensor to act to test the thickness of the sample, and the test value is transmitted into the monitoring system through a data line connected with the monitoring system;
the cylinder is vertically fixed above the thickness measuring platform, and a cylinder moving rod and a pressure head which are fixed together are arranged below the cylinder;
the pressure dividing system is connected with the air cylinder and is controlled by a two-position five-way valve, and adopts a structure that a pressure reducing valve of the pressure dividing system is arranged in front of the pressure dividing system and a two-position three-way valve of the pressure dividing system is arranged behind the pressure dividing system; the pressure relief device is arranged at the upstream of the pressure dividing system, and an air source pressure reducing valve is arranged between the pressure relief device and the pressure dividing system.
Furthermore, the pressure dividing system is formed by correspondingly connecting three pressure dividing system pressure reducing valves arranged in parallel with two three-way valves of the pressure dividing system arranged in parallel, and a pressure dividing system pressure gauge is further arranged between the pressure dividing system pressure reducing valves and the two three-way valves of the pressure dividing system.
Furthermore, the ascending position of the two-position five-way valve is connected with an air ascending pipe of the air cylinder, and the descending position of the two-position five-way valve is connected with an air descending pipe of the air cylinder so as to control the air cylinder to ascend and descend.
Furthermore, the pressure relief device is a valve for closing pressure relief.
Furthermore, the plane of the thickness measuring platform is made of stainless steel.
Furthermore, the thickness measuring platform is also provided with a ruler for measuring the length dimension of the bipolar plate.
The invention also discloses a test method for the fuel cell bipolar plate thickness measuring device, which comprises the following steps:
s1, ventilation and pressure regulation: the pressure of the introduced gas is regulated by a gas source pressure reducing valve through a gas source pressure reducing valve, the pressure after pressure reduction is checked on a gas source pressure gauge, a pressure dividing system is operated by three pressure reducing valves for dividing pressure, the gas enters the device and then passes through a low-pressure reducing valve, a medium-pressure reducing valve and a high-pressure reducing valve respectively, the pressure for testing is regulated, the pressure is checked through a pressure gauge, the testing pressure is set through a monitoring system, and the switching of gas sources with different testing pressures is realized by utilizing the pressure dividing system;
s2, calibration: the device needs to be calibrated before sample testing, firstly, a standard block with the same specification as a sample to be tested is selected for calibration, the standard block is located below the air cylinder on the thickness measuring platform, the calibration button is started, the two-position five-way valve is switched to the position for controlling the air cylinder to descend, the air cylinder is driven to move downwards and stably through set pressure, the pressure head compresses the standard block with the set pressure, calibration is started after stabilization, the two-position five-way valve is switched to the position for controlling the air cylinder to ascend after calibration is completed, the air cylinder is driven to ascend to release the standard block, and calibration is completed.
S3, testing: when a sample is tested, the sample is placed on the thickness measuring platform and located below the air cylinder, the test button is started, the two-position five-way valve is switched to the position for controlling the air cylinder to descend, the air cylinder is driven to move downwards stably through set pressure, the pressure head compresses the standard block with the set pressure, the calibrated pressure is the same as the tested pressure, the measurement is started after the calibration is stable, the two-position five-way valve is switched to the position for controlling the air cylinder to ascend after the test is completed, the air cylinder is driven to ascend to release the standard block, and the test.
The invention has ingenious structural design, and the pressure dividing system adopts a structure that the pressure reducing valve is arranged behind the two front three-way valves, so that the pressure is firstly adjusted and then divided, thereby avoiding the error generated in the pressure increasing process. The pressure reducing valve of the partial pressure system is used for secondary pressure reduction of the total air source, and aims to prevent the pressure of the total air inlet source from being too high, provide reasonable pressure for equipment and improve the range of application occasions of the equipment. Through the steady motion cylinder, move steadily when making the pressure head rise to descend, and still can keep the steady action of cylinder under low pressure state, utilize two-position five-way solenoid valve control cylinder's lift to drive the pressure head and compress tightly the sample and loosen the sample. The pressure head is mainly used for compressing the sample, has very high roughness to guarantee that the atress of sample is even, avoid the atress inequality to make the sample take place to deform. The thickness measuring sensor provided by the invention is purchased from a Ginshi manufacturer by adopting a high-precision contact sensor, and has the advantages of strong capability of being interfered by the outside, wider application range, higher precision and better stability compared with other sensors, and the display precision of the thickness measuring sensor can reach 0.1 mu m. The thickness measuring platform adopts a plane made of stainless steel, so that the hardness of the platform can be ensured, the flatness and the smoothness of the platform can be ensured, the uniform stress of a sample is ensured, the sample is prevented from being deformed due to uneven stress, and the accuracy of sample testing is ensured. The pressure dividing system adopts a three-section parallel design, which is favorable for distinguishing high, medium and low three-gear pressure, the adjustable pressure reducing valve is matched with a set of system which is composed of three two-position three-way electromagnetic valves and can be freely adjusted and freely switch pressure head pressure, three different pressures (namely low pressure, medium pressure and high pressure can be randomly adjusted along with customer requirements) can be set through the three pressure reducing valves, and the pressure of the pressure head is controlled by controlling different electromagnetic valves so as to adjust the strength of the test head applied on the surface of a sample, thereby being suitable for the test requirements of different samples. The pressure relief device adopts a valve for shutting off pressure relief and is used for discharging residual pressure in the device so as to ensure the safety of the system. The device provided by the invention can ensure the accuracy and safety of the test through pressure regulation and switching.
Drawings
Fig. 1 is a schematic structural diagram of a fuel cell bipolar plate thickness measuring device.
The pressure measuring device comprises a pressure dividing system pressure gauge 1, a pressure dividing system pressure reducing valve 2, an air source pressure reducing valve 3, a pressure relief device 4, a pressure relief device 5, a two-position three-way valve of the pressure dividing system, a 6 two-position five-way valve, a 7 cylinder, a 8 high-precision sensor, a 9 scale, a 10 thickness measuring platform, a 11 pressure head, a 12 cylinder moving rod.
Detailed Description
The invention is described in more detail below with reference to specific examples, without limiting the scope of the invention. Unless otherwise specified, the experimental methods adopted by the invention are all conventional methods, and experimental equipment, materials, reagents and the like used in the method can be obtained from commercial sources. Wherein, the high accuracy sensor is the touch sensor and purchases in the producer of kirschwasser.
Example 1
The fuel cell bipolar plate thickness measuring device comprises a monitoring system, a cylinder, a high-precision thickness measuring sensor, a thickness measuring platform, a pressure dividing system, a pressure relief device and instrument gas pipelines of all parts.
The monitoring system is respectively electrically connected with the thickness measuring device PLC and the high-precision thickness measuring sensor; controlling and monitoring the thickness measuring device and the sensor in real time, and outputting a test result;
the high-precision thickness measuring sensor 8 is connected with a pressure head 11, the pressure head 11 acts to drive the high-precision thickness measuring sensor 8 to act to test the thickness of a sample, and a test value is transmitted into the monitoring system through a data line connected with the monitoring system; in the calibration and measurement process, the pressure head 11 drives the high-precision thickness measuring sensor 8 to lift up and fall down, and the thickness value of the sample can be measured through the stroke of the movement of the high-precision thickness measuring sensor 8 after touching the plane;
the cylinder 7 is vertically fixed above the stainless steel thickness measuring platform 10, and a cylinder moving rod 12 and a pressure head 11 which are fixed together are arranged below the cylinder; the thickness measuring platform 10 is also provided with a scale 9 for measuring the length dimension of the bipolar plate.
The pressure dividing system is connected with the air cylinder 7 and is controlled by the two-position five-way valve 6, and the pressure dividing system adopts a structure that a pressure reducing valve 2 of the pressure dividing system is arranged in front of the pressure dividing system and a two-position three-way valve 5 of the pressure dividing system is arranged behind the pressure dividing system; the two-position five-way valve 6 is connected with an air ascending pipe of the air cylinder 7 at an ascending position and is connected with an air descending pipe of the air cylinder 7 at a descending position; pressure relief device 4 establishes at the pressure divider system upper reaches, pressure relief device 4 be the valve of shutoff pressure release, still be equipped with air supply relief pressure valve 3 between pressure relief device 4 and pressure divider system.
The pressure dividing system is characterized in that three pressure dividing system pressure reducing valves 2 arranged in parallel are correspondingly connected with two three-way valves 5 of the pressure dividing system arranged in parallel, and a pressure dividing system pressure gauge 1 is further arranged between the pressure dividing system pressure reducing valves 2 and the two three-way valves 5 of the pressure dividing system.
Example 2
In this embodiment, a calibration process of the thickness measuring device is described in detail by taking a standard block with a thickness of 1mm as an example.
(a) Before calibration, a power supply is required to be started to electrify each device to complete self-detection, and monitoring software of the thickness measuring device is started.
(b) And starting a main gas source switch of the fuel cell thickness measuring device to lead gas to the thickness measuring device, adjusting a gas source pressure reducing valve 3 to reduce the pressure of the gas entering the equipment to 2MPa by taking a 1mm standard block as an example, and adjusting a pressure reducing valve 2 of a pressure division system to adjust the test pressure of low, medium and high difference.
(c) Calibration, selecting standard block specification and corresponding test pressure in a fuel cell bipolar plate thickness measurement monitoring system, pressing a low-pressure test pressure button, placing a standard block on a thickness measurement platform 10 below a pressure head 11 after the setting is finished, starting the calibration button, switching a two-position five-way valve 6 to a descending position, driving a cylinder 7 to descend and compress the standard block by 0.2bar gas, automatically calibrating the equipment after the stabilization, switching the two-position five-way valve 7 to an ascending position after the calibration is finished, driving the cylinder to stably ascend and loosen the standard block, and indicating and displaying the calibration state in the monitoring system to finish the calibration operation after the calibration is finished.
Example 3
This example illustrates the testing of a 2mm bipolar plate at a pressure of 0.2 bar.
Calibration must be completed before any first test. The specific calibration method is detailed in example 1.
And after the calibration is finished, the standard block below the pressure head 11 is taken away, the bipolar plate to be measured is placed under the pressure head 11, a user can set the qualified index of the sample in a user-defined mode, the upper limit value and the lower limit value are set in the thickness upper limit index of the monitoring system, and the measuring button is started. The two-position five-way valve 6 is switched to a descending position, the gas of 0.2bar drives the cylinder 7 to descend to enable the pressure head 11 to press the bipolar plate, the thickness of the bipolar plate under the pressure of 0.2bar is measured after the bipolar plate is stabilized, the thickness value of the bipolar plate under the pressure of 0.2bar is displayed on a monitoring system, the deformation of a sample to be tested under different pressures can affect the thickness to a certain extent, whether the state of the sample is qualified or not is automatically judged according to upper and lower limit indexes of the thickness set in the monitoring system, the state of the sample is displayed on the monitoring system to be qualified/unqualified, the two-position five-way valve 6 is switched to an ascending position after the test is completed, the cylinder 7 is driven to ascend stably to.
The above description is only for the purpose of creating a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the inventive concept of the present invention within the technical scope of the present invention.
Claims (7)
1. The fuel cell bipolar plate thickness measuring device is characterized by comprising a monitoring system, a cylinder, a high-precision thickness measuring sensor, a thickness measuring platform, a pressure dividing system, a pressure relief device and instrument gas pipelines of all parts.
The monitoring system is respectively electrically connected with the thickness measuring device PLC and the high-precision thickness measuring sensor; controlling and monitoring the thickness measuring device and the sensor in real time, and outputting a test result;
the high-precision thickness measuring sensor (8) is connected with a pressure head (11), the pressure head (11) acts to drive the high-precision thickness measuring sensor (8) to act to test the thickness of a sample, and a test value is transmitted into the monitoring system through a data line connected with the monitoring system;
the cylinder (7) is vertically fixed above the thickness measuring platform (10), and a cylinder moving rod (12) and a pressure head (11) which are fixed together are arranged below the cylinder;
the pressure dividing system is connected with the air cylinder (7) and is controlled by the two-position five-way valve (6), and adopts a structure that a pressure reducing valve (2) of the pressure dividing system is arranged in front of the pressure dividing system and a two-position three-way valve (5) of the pressure dividing system is arranged behind the pressure dividing system; the pressure relief device (4) is arranged at the upstream of the pressure dividing system, and an air source pressure reducing valve (3) is also arranged between the pressure relief device (4) and the pressure dividing system.
2. The fuel cell bipolar plate thickness measuring device according to claim 1, wherein the pressure dividing system is formed by correspondingly connecting three pressure dividing system pressure reducing valves (2) arranged in parallel with two-position three-way valves (5) arranged in parallel, and a pressure dividing system pressure gauge (1) is further arranged between the pressure dividing system pressure reducing valves (2) and the two-position three-way valves (5) of the pressure dividing system.
3. The fuel cell bipolar plate thickness measuring device according to claim 1, wherein the two-position five-way valve (6) is connected with the gas ascending pipe of the cylinder (7) in an ascending position, and is connected with the gas descending pipe of the cylinder (7) in a descending position so as to control the ascending and descending of the cylinder (7).
4. A fuel cell bipolar plate thickness measuring device according to claim 1, wherein said pressure relief device (4) is a valve for shutting off pressure relief.
5. The fuel cell bipolar plate thickness measuring device according to claim 1, wherein the plane of the thickness measuring platform (10) is made of stainless steel.
6. A fuel cell bipolar plate thickness measuring device according to claim 1, wherein the thickness measuring platform (10) is further provided with a scale (9) for measuring the length dimension of the bipolar plate.
7. A thickness measuring method using the fuel cell bipolar plate thickness measuring apparatus according to claim 1, comprising the steps of:
s1, ventilation and pressure regulation: the pressure of the introduced gas is adjusted by a gas source pressure reducing valve (3) through a gas source pressure supply source, the pressure after pressure reduction is checked on a gas source pressure gauge, a pressure dividing system is operated by three pressure reducing valves for dividing pressure, the gas enters the device and then passes through a low-pressure reducing valve, a medium-pressure reducing valve and a high-pressure reducing valve respectively, the pressure for testing is adjusted, the pressure is checked through a pressure gauge, the testing pressure is set through a monitoring system, and the switching of gas sources with different testing pressures is realized by the pressure dividing system;
s2, calibration: the device needs to be calibrated before sample testing, firstly, a standard block with the same specification as a sample to be tested is selected for calibration, the standard block is arranged on a thickness measuring platform (10) and is positioned below an air cylinder (7), a calibration button is started, a two-position five-way valve (6) is switched to a position for controlling the descending of the air cylinder (10), the air cylinder (7) is driven to move downwards stably through set pressure, a pressure head (11) compresses the standard block with the set pressure, calibration is started after stabilization, the two-position five-way valve (6) is switched to a position for controlling the ascending of the air cylinder (7) after calibration is completed, the air cylinder (7) is driven to ascend to release the standard block, and calibration;
s3, testing: when a sample is tested, the sample is placed on a thickness measuring platform (10) and located below an air cylinder (7), a test button is started, a two-position five-way valve (6) is switched to a position where a control air cylinder (10) descends, the air cylinder (7) is driven to move downwards stably through set pressure, a pressure head (11) compresses a standard block with the set pressure, the calibrated pressure is the same as the tested pressure, measurement is started after stabilization, the two-position five-way valve (6) is switched to a position where the control air cylinder (7) ascends after the test is completed, the drive air cylinder (7) ascends to release the standard block, and the test is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011130850.5A CN112393706A (en) | 2020-10-21 | 2020-10-21 | Fuel cell bipolar plate thickness measuring device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011130850.5A CN112393706A (en) | 2020-10-21 | 2020-10-21 | Fuel cell bipolar plate thickness measuring device and method |
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| CN112393706A true CN112393706A (en) | 2021-02-23 |
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| CN202011130850.5A Pending CN112393706A (en) | 2020-10-21 | 2020-10-21 | Fuel cell bipolar plate thickness measuring device and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114964101A (en) * | 2022-07-28 | 2022-08-30 | 新恒汇电子股份有限公司 | Automatic measuring equipment and measuring method for module glue height |
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2020
- 2020-10-21 CN CN202011130850.5A patent/CN112393706A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114964101A (en) * | 2022-07-28 | 2022-08-30 | 新恒汇电子股份有限公司 | Automatic measuring equipment and measuring method for module glue height |
| CN114964101B (en) * | 2022-07-28 | 2023-01-10 | 新恒汇电子股份有限公司 | Automatic measuring equipment and measuring method for module glue height |
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