CN118482870A - Method and clamp for detecting air tightness of metal bipolar plate of fuel cell - Google Patents
Method and clamp for detecting air tightness of metal bipolar plate of fuel cell Download PDFInfo
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- CN118482870A CN118482870A CN202410448773.XA CN202410448773A CN118482870A CN 118482870 A CN118482870 A CN 118482870A CN 202410448773 A CN202410448773 A CN 202410448773A CN 118482870 A CN118482870 A CN 118482870A
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- 239000000446 fuel Substances 0.000 title claims abstract description 34
- 239000002184 metal Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000007789 sealing Methods 0.000 claims abstract description 243
- 238000001514 detection method Methods 0.000 claims abstract description 62
- 238000003825 pressing Methods 0.000 claims abstract description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 31
- 239000000741 silica gel Substances 0.000 claims description 31
- 229910002027 silica gel Inorganic materials 0.000 claims description 31
- 239000007789 gas Substances 0.000 claims 11
- 230000000694 effects Effects 0.000 abstract description 4
- 238000003466 welding Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 229920003169 water-soluble polymer Polymers 0.000 description 2
- 208000025962 Crush injury Diseases 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a method and a clamp for detecting the air tightness of a metal bipolar plate of a fuel cell, which belong to the technical field of fuel cells, and comprise the steps of mounting a lower supporting plate of a detection clamp on a lower fixing plate of a machine table, and mounting an upper supporting plate of the detection clamp on an upper fixing plate of the machine table; placing the product to be tested on the lower supporting plate, and positioning the product to be tested; pushing the upper supporting plate to move along the direction close to the lower supporting plate, and pressing the product to be tested through the first sealing piece positioned on the upper supporting plate and the second sealing piece positioned on the lower supporting plate so as to separate N sealing areas on the product to be tested; the gas supply assembly inputs test gas into the N sealing areas respectively according to the preset gas pressure values, and the detection assembly acquires the test gas pressure values in the sealing areas; and comparing the test air pressure value with the standard air pressure value to judge whether the air tightness of the product to be tested is qualified or not. The invention has the technical effects of being capable of rapidly detecting the air tightness of a large number of bipolar plates and having higher detection efficiency.
Description
Technical Field
The invention belongs to the technical field of fuel cells, and particularly relates to a method and a clamp for detecting the air tightness of a metal bipolar plate of a fuel cell.
Background
A fuel cell is a chemical device that directly converts chemical energy possessed by fuel into electric energy, and is an important representative of clean energy, and a metal bipolar plate is one of important components of the fuel cell.
At present, in the fuel cell technology, a metal sheet is usually made into an anode plate and a cathode plate, then the anode plate and the cathode plate are connected together in a laser welding mode to form a metal bipolar plate finished product, the welding lines formed by welding cannot generate defects such as cold welding, welding through, explosion points, crush injuries and the like, the polar plate substrate cannot generate defects such as cracking and the like, the existing detection process for the air tightness of the metal bipolar plate of the fuel cell cannot quickly and effectively detect the air tightness of a large number of bipolar plates, whether the integrity of the welding lines of the bipolar plate and the integrity of the polar plate substrate meet requirements or not is difficult to judge in time, and the detection efficiency of the air tightness detection is low.
Therefore, a new solution is needed to solve the above technical problems.
Disclosure of Invention
The invention aims to solve the technical problems that the air tightness of a large number of bipolar plates is difficult to detect quickly and the detection efficiency is low.
In order to solve the technical problems, the invention provides a method for detecting the air tightness of a metal bipolar plate of a fuel cell, which comprises the following steps: mounting a lower support plate of a detection clamp onto a lower fixing plate of a machine table, and mounting an upper support plate of the detection clamp onto an upper fixing plate of the machine table; placing a product to be detected on the lower supporting plate, and positioning the product to be detected; pushing the upper supporting plate to move along the direction close to the lower supporting plate, and pressing the product to be tested through a first sealing piece positioned on the upper supporting plate and a second sealing piece positioned on the lower supporting plate so as to separate N sealing areas on the product to be tested, wherein N is a positive integer; the gas supply assembly inputs test gas into the N sealing areas respectively according to a preset gas pressure value, and the detection assembly acquires the test gas pressure value in the sealing areas; comparing the test air pressure value with a standard air pressure value to judge whether the air tightness of the product to be tested is qualified or not; if yes, the upper supporting plate and the lower supporting plate are pushed to be separated to take out the product to be tested.
Optionally, the positioning the product to be tested includes: and a plurality of positioning blocks arranged on the product to be tested are respectively embedded into a plurality of positioning grooves positioned in the lower supporting plate, and a plurality of positioning blocks are arranged in one-to-one correspondence with a plurality of positioning grooves.
Optionally, the compressing the product to be tested by the first sealing member located on the upper support plate and the second sealing member located on the lower support plate includes: moving the first sealing element along a direction close to and opposite to the second sealing element so as to compress the product to be tested from two sides of the product to be tested through the first sealing element and the second sealing element; wherein the value range of N is 3 to 5.
Optionally, the gas supply assembly inputs the test gas into the N sealing areas according to a preset gas pressure value, respectively, including: communicating an air pipe with the air supply assembly and the N sealing areas respectively; the air supply assembly inputs the test air into the N sealing areas through the air pipes respectively according to a preset air pressure value; wherein the value range of the preset air pressure value is 190KPa to 230KPa.
Optionally, the detecting component obtaining the test air pressure value in the sealing area includes: the air supply assembly stops inputting the test air into the air pipe according to preset time, and the test air pressure value in the sealing area is measured in the preset time through the detection assembly arranged on the air pipe.
Optionally, the detection component is an air pressure tester, and the value range of the preset time is 10 seconds to 15 seconds.
Optionally, comparing the test air pressure value with a standard air pressure value to determine whether the air tightness of the product to be tested is qualified includes: obtaining a difference value between the test air pressure value and the standard air pressure value; if the difference value is smaller than or equal to 15KPa and the test air pressure value is smaller than the standard air pressure value, judging that the air tightness of the product to be tested is qualified; and if the difference is larger than 15KPa, judging that the air tightness of the product to be tested is unqualified.
According to still another aspect of the present invention, there is also provided a jig for fuel cell metal bipolar plate gas tightness detection, the jig comprising: the device comprises an upper supporting plate, a sealing assembly, an air supply assembly, a detection assembly and a lower supporting plate for supporting a product to be detected, wherein the lower supporting plate is arranged on a lower fixing plate of a machine table; the upper supporting plate is arranged on an upper fixing plate of the machine table, and the product to be tested is positioned between the upper supporting plate and the lower supporting plate; the sealing assembly comprises a first sealing element arranged on the upper supporting plate and a second sealing element arranged on the lower supporting plate, wherein the first sealing element is opposite to the second sealing element, and N sealing areas are separated from the product to be tested through the first sealing element and the second sealing element; the gas supply assembly is used for inputting test gas into the sealing areas respectively, and the detection assembly is used for obtaining the test gas pressure value in the sealing areas.
Optionally, the lower support plate is provided with air passages, the number of which is the same as that of the N sealing areas, and the air passages are communicated with the corresponding sealing areas; the air supply assembly comprises an air pump and pipelines with the same number as N sealing areas, the pipelines are respectively communicated with the air pump and the corresponding air passages, and the detection assembly is arranged on the pipelines.
Optionally, the first sealing piece and the second sealing piece are both silica gel sealing rings, and the thickness of the first sealing piece and the thickness of the second sealing piece are both in a range of 0.2 mm to 0.35 mm.
The beneficial effects are that:
The invention provides a method for detecting the air tightness of a metal bipolar plate of a fuel cell, which comprises the steps of firstly, mounting a lower supporting plate of a detection clamp on a lower fixed plate of a machine table, and mounting an upper supporting plate of the detection clamp on an upper fixed plate of the machine table; placing a product to be detected on the lower supporting plate, and positioning the product to be detected; then pushing the upper supporting plate to move along the direction approaching to the lower supporting plate, and pressing the product to be tested through a first sealing piece positioned on the upper supporting plate and a second sealing piece positioned on the lower supporting plate so as to separate N sealing areas on the product to be tested, wherein N is a positive integer; secondly, the air supply assembly respectively inputs test air into N sealing areas according to a preset air pressure value, and the detection assembly acquires the test air pressure value in the sealing areas; finally, comparing the test air pressure value with a standard air pressure value to judge whether the air tightness of the product to be tested is qualified or not; if yes, the upper supporting plate and the lower supporting plate are pushed to be separated to take out the product to be tested. After the product to be measured is placed between the lower supporting plate and the upper supporting plate, the first sealing piece positioned on the upper supporting plate and the second sealing piece positioned on the lower supporting plate clamp the product to be measured from two sides of the product to be measured, N sealing areas are formed on the product to be measured, the air supply assembly and the detection assembly work cooperatively, the test air pressure value of each sealing area is measured faster, whether the air tightness of the product to be measured is qualified can be judged rapidly and accurately by comparing the test air pressure value with the standard air pressure value, and then the air tightness detection of a large number of bipolar plates is realized faster, so that the detection efficiency is improved. Therefore, the technical effect of being capable of rapidly detecting the air tightness of a large number of bipolar plates and being high in detection efficiency is achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for detecting the air tightness of a metal bipolar plate of a fuel cell according to an embodiment of the present invention;
Fig. 2 is a schematic structural diagram of a fixture for detecting tightness of a metal bipolar plate of a fuel cell according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a seal assembly in a fixture for detecting tightness of a metal bipolar plate of a fuel cell according to an embodiment of the present invention.
The meaning of the reference numerals in the drawings are:
1-a lower supporting plate, 11-an air passage; 2-an upper support plate; 3-a seal assembly; 4-lower fixing plate, 41-upper fixing plate.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present application and are not to be construed as limiting the present application.
In order to enable those skilled in the art to better understand the solution of the present application, the following description will make clear and complete descriptions of the technical solution of the present application in the embodiments of the present application with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the embodiment of the application, at least one refers to one or more; a plurality of the water-soluble polymers are arranged on the water-soluble polymers, refers to two or more. In the description of the present application, the words "first," "second," "third," and the like are used solely for the purpose of distinguishing between descriptions and not necessarily for the purpose of indicating or implying a relative importance or order.
Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, the terms "comprising," "including," "having," and variations thereof herein mean "including but not limited to," unless expressly specified otherwise. It should be noted that, in the embodiment of the present application, "and/or" describe the association relationship of the association object, which means that three relationships may exist, for example, a and/or B may be represented: a exists alone, A and B exist together, and B exists alone.
It should be noted that in embodiments of the present application, when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. Meanwhile, "connection" in the embodiments of the present application may be understood as an electrical connection, and the connection between two electrical components may be a direct or indirect connection between two electrical components. For example, a may be directly connected to B, or indirectly connected to B via one or more other electrical components. The terms "vertical", "horizontal", "left", "right" and the like are used in the embodiments of the present application for illustrative purposes only and are not intended to limit the present application.
Example 1
An embodiment of the invention provides a method for detecting the air tightness of a metal bipolar plate of a fuel cell, referring to fig. 1, fig. 1 is a flowchart of the method for detecting the air tightness of the metal bipolar plate of the fuel cell. The method for detecting the air tightness of the metal bipolar plate of the fuel cell provided by the embodiment of the invention comprises the following steps of:
Step S100, mounting the lower support plate 1 of the inspection jig onto the lower fixing plate 4 of the machine, and mounting the upper support plate 2 of the inspection jig onto the upper fixing plate 41 of the machine;
Specifically, after the lower support plate 1 of the detection fixture is mounted on the lower fixing plate 4 of the machine, the lower support plate 1 can provide support for a product to be detected, and the product to be detected comprises a metal bipolar plate. The upper support plate 2 of the detection clamp is mounted on the upper fixing plate 41 of the machine, so that the lower fixing plate 4 of the machine drives the lower support plate 1, and the upper fixing plate 41 of the machine drives the upper support plate 2 to be close to each other, and at this time, the lower support plate 1 and the upper support plate 2 can clamp a product to be detected.
Step 200, placing a product to be tested on the lower support plate 1, and positioning the product to be tested;
wherein, the positioning the product to be measured includes: and a plurality of positioning blocks arranged on the product to be tested are respectively embedded into a plurality of positioning grooves in the lower support plate 1, and a plurality of positioning blocks are arranged in one-to-one correspondence with a plurality of positioning grooves.
Specifically, the lower support plate 1 is mounted on the lower fixing plate 4 through the step S100, after the upper support plate 2 is mounted on the upper fixing plate 41, the product to be tested is placed on the lower support plate 1, a plurality of positioning blocks are arranged around the product to be tested, positioning grooves matched with the positioning blocks are arranged on the lower support plate 1, and the positioning blocks on the product to be tested are respectively embedded into the positioning grooves on the lower support plate 1, so that the product to be tested keeps a stable position in the detection process, and the air tightness detection caused by position deviation can be prevented from generating larger errors and more repeated operations. In the process of inputting detection gas to the sealing areas by the gas supply assembly, the accurate positioning is carried out on the product to be detected, so that the accurate acquisition of the test gas pressure value of each sealing area is facilitated.
Step S300, pushing the upper support plate 2 to move along the direction approaching to the lower support plate 1, and pressing the product to be tested through a first sealing piece positioned on the upper support plate 2 and a second sealing piece positioned on the lower support plate 1 so as to separate N sealing areas on the product to be tested, wherein N is a positive integer;
wherein said compacting said product to be tested by means of a first seal located on said upper support plate 2 and a second seal located on said lower support plate 1 comprises: and moving the first sealing element along the direction approaching to and opposite to the second sealing element so as to press the product to be tested from two sides of the product to be tested through the first sealing element and the second sealing element. Wherein the value range of N is 3 to 5.
Specifically, after the product to be tested is positioned through the steps S100 and S200, the upper support plate 2 is pushed to move along the direction close to the lower support plate 1, so that the first sealing element positioned on the upper support plate 2 and the second sealing element positioned on the lower support plate 1 are gradually close to each other, and the first sealing element and the second sealing element compress the product to be tested from two sides of the product to be tested, thereby separating N sealing areas on the product to be tested. The product to be tested can be a metal bipolar plate of a fuel cell, the bipolar plate can be coated with primer in a spot mode, and adhesive tapes are adhered on the primer, or welding seams are formed on the bipolar plate. When the value range of N is 3 to 5, the higher detection efficiency can be realized, and the air tightness of the product to be detected can be detected more comprehensively, namely, the high-efficiency and more accurate test requirements are met.
In actual operation, the upper supporting plate 2 of the detection clamp is pushed to move along the direction close to the lower supporting plate 1 until the first sealing element of the upper supporting plate 2 and the second sealing element of the lower supporting plate 1 are tightly attached to the surface of a product to be detected, and the second sealing element effectively compresses the two sides of the product to be detected by the first sealing element and the second sealing element, so that a plurality of sealing areas are formed on the product to be detected, namely partial welding seams are wrapped in each sealing area. The first sealing element and the second sealing element are all silica gel sealing rings, the number of the first sealing elements and the number of the second sealing elements are three, the three first sealing elements are respectively a first upper silica gel sealing ring, a second upper silica gel sealing ring and a third upper silica gel sealing ring, the three second sealing elements are respectively a first lower silica gel sealing ring, a second lower silica gel sealing ring and a third lower silica gel sealing ring, the first upper silica gel sealing ring is opposite to the first lower silica gel sealing ring, the second upper silica gel sealing ring is opposite to the second lower silica gel sealing ring, the third upper silica gel sealing ring is opposite to the third lower silica gel sealing ring, after the first upper silica gel sealing ring arranged on the upper supporting plate 2 and the first lower silica gel sealing ring arranged on the lower supporting plate 1 are tightly pressed from two sides of a product to be tested, a sealed sealing area can be formed on the product to be tested by the first upper silica gel sealing ring and the first lower silica gel sealing ring, and the sealing area can contain test gas, and the sealing area is assumed to be an A sealing area. At this time, the second upper silica gel sealing ring and the second lower silica gel sealing ring also form a sealed sealing area on the product to be tested, and the sealing area is assumed to be a B sealing area. The third upper silica gel sealing ring and the third lower silica gel sealing ring also form a sealed sealing area on the product to be tested, and the sealing area is assumed to be a C sealing area. The above-mentioned seal a, seal B and seal C will encapsulate the entire weld on the bipolar plate.
Step S400, the air supply assembly respectively inputs test air into N sealing areas according to preset air pressure values, and the detection assembly acquires the test air pressure values in the sealing areas;
The gas supply assembly respectively inputs test gas into the N sealing areas according to a preset gas pressure value, and the gas supply assembly comprises: communicating an air pipe with the air supply assembly and the N sealing areas respectively; the air supply assembly inputs the test air into the N sealing areas through the air pipes respectively according to a preset air pressure value; wherein the value range of the preset air pressure value is 190KPa to 230KPa. The detecting assembly obtaining a test air pressure value in the sealing area comprises: the gas supply assembly stops inputting the test gas into the gas pipe according to a preset time, and the test gas pressure value in the sealing area is measured in the preset time through the detection assembly arranged on the gas pipe. The detection component is an air pressure tester, and the value range of the preset time is 10 seconds to 15 seconds.
Specifically, after N sealing areas are separated on the product to be tested through the steps S100 to S300, the test gas may be respectively input into each sealing area through the gas supply assembly. The air supply assembly comprises an air pump and pipelines, the pipelines are mutually communicated with the air pump, and the number of the pipelines can be the same as that of the sealing areas. The inside a plurality of air flue 11 that are provided with of bottom suspension fagging 1, the quantity of air flue 11 can be the same with above-mentioned sealing area quantity, if be provided with three air flue 11 in inside of bottom suspension fagging 1, three air flue 11 communicate each other with the inside of above-mentioned A sealing area, B sealing area and C sealing area respectively, and simultaneously three air flue 11 communicate each other with three pipeline respectively, and three pipeline all communicates each other with the air pump, and the air pump passes through the pipeline with test gas input respectively to the inside of above-mentioned A sealing area, B sealing area and C sealing area. The air pressure of the test gas input into the pipeline can be a preset air pressure value, the value range of the preset air pressure value can be 190KPa to 230KPa, and the test gas can be fully filled in the sealing area and the air tightness of the product to be tested can be effectively detected. Test gas is fed into the inside of the above-mentioned seal A, seal B and seal C through the pipe and the air passage 11, respectively, according to a gas pressure value of 200KPa by a gas pump. In addition, detection components are respectively arranged on each pipeline near the air passage 11, the detection components comprise air pressure testers, for example, the air pressure testers respectively arranged on the three pipelines are a first air pressure tester, a second air pressure tester and a third air pressure tester, the first air pressure tester is used for detecting air pressure values in the pipelines communicated with the A sealing area, namely, the first air pressure tester displays the air pressure values in the A sealing area in real time, and the air pressure value displayed by the first air pressure tester is assumed to be P1. The second air pressure tester is used for detecting the air pressure value in the pipeline communicated with the sealing area B, namely the second air pressure tester displays the air pressure value in the sealing area B in real time, and the air pressure value displayed by the second air pressure tester is assumed to be P2. The third air pressure tester is used for detecting the air pressure value in the pipeline communicated with the C sealing area, namely the third air pressure tester displays the air pressure value in the C sealing area in real time, and the air pressure value displayed by the third air pressure tester is assumed to be P3.
After the test gas is input, the gas supply assembly stops inputting according to the preset time, and the detection assembly starts working at the moment, namely the first air pressure tester, the second air pressure tester and the third air pressure tester are respectively started to measure, and the value range of the preset time can be 10 seconds to 15 seconds, so that the accuracy and the stability of the test result are guaranteed. If the air pump respectively inputs the test air into the A sealing area, the B sealing area and the C sealing area through the pipelines, the air pump is stopped for 15 seconds, then the first air pressure tester, the second air pressure tester and the third air pressure tester are respectively started, at the moment, the air pressure value P1 displayed by the first air pressure tester, the air pressure value P2 displayed by the second air pressure tester and the air pressure value P3 displayed by the third air pressure tester are recorded, and the test air pressure value for comparing with the standard air pressure value is provided for the following step S500.
Step S500, comparing the test air pressure value with a standard air pressure value to judge whether the air tightness of the product to be tested is qualified or not;
Wherein, comparing the test air pressure value with a standard air pressure value to judge whether the air tightness of the product to be tested is qualified comprises: obtaining a difference value between the test air pressure value and the standard air pressure value; if the difference value is smaller than or equal to 15KPa and the test air pressure value is smaller than the standard air pressure value, judging that the air tightness of the product to be tested is qualified; and if the difference is larger than 15KPa, judging that the air tightness of the product to be tested is unqualified.
Specifically, after the test air pressure value in the sealing area is obtained in the step S400, namely, the test air pressure value P1 in the sealing area a, the test air pressure value P2 in the sealing area B, and the test air pressure value P3 in the sealing area C are obtained, the standard air pressure value is assumed to be P, and the test air pressure value is compared with the standard air pressure value according to the obtained test air pressure value, so as to determine whether the air tightness of the product to be tested is qualified. Assuming that |p1-p|=w1, |p2-p|=w2, |p3-p|=w3, if P1 < P and W1 > 15KPa, the airtightness in the a sealing area is judged to be unqualified, that is, the airtightness of the part of the product to be tested in the sealing area formed by the first upper silica gel seal ring and the first lower silica gel seal ring is not qualified, and if P1 < P and W1 is less than or equal to 15KPa, the airtightness in the a sealing area is judged to be qualified. If P2 is less than P and W2 is more than 15KPa, judging that the air tightness in the B sealing area is unqualified, namely the air tightness of the part of the product to be detected in the sealing area formed by the second upper silica gel sealing ring and the second lower silica gel sealing ring is unqualified, and if P2 is less than P and W2 is less than or equal to 15KPa, judging that the air tightness in the B sealing area is qualified. If P3 is less than P and W3 is more than 15KPa, judging that the air tightness in the C sealing area is unqualified, namely the air tightness of the part of the product to be detected in the sealing area formed by the third upper silica gel sealing ring and the third lower silica gel sealing ring is unqualified, and if P3 is less than P and W3 is less than or equal to 15KPa, judging that the air tightness in the C sealing area is qualified. And when judging that the air tightness of the sealing area A, the sealing area B and the sealing area C is qualified, judging that the air tightness of the product to be detected is qualified, namely the welding seam on the product to be detected is qualified. And when judging that the air tightness of any one of the sealing area A, the sealing area B and the sealing area C is unqualified, judging that the air tightness of the product to be tested is unqualified, namely, the welding seam on the product to be tested is unqualified. Meanwhile, if the air tightness of the sealing area A and the air tightness of the sealing area B are judged to be qualified, and the air tightness of the sealing area C is judged to be unqualified, the operator can check the welding line of the sealing area C again conveniently, the judgment accuracy is improved, and the welding line of the sealing area C can be repaired in time conveniently.
Step S600, if yes, pushing the upper support plate 2 to separate from the lower support plate 1 to take out the product to be tested.
Specifically, when it is judged that the air tightness of the product to be tested is acceptable through the above step S500, the product to be tested can be taken out by pushing the upper support plate 2 and the lower support plate 1 to be separated from each other. The lower support plate 1 is arranged on the lower fixing plate 4 of the machine table, the upper support plate 2 is arranged on the upper fixing plate 41 of the machine table, the lower fixing plate 4 of the machine table drives the upper support plate 2 when the air tightness of the product to be detected is qualified, and the upper fixing plate 41 of the machine table drives the upper support plate 2 to be far away from each other, so that the product to be detected can be taken out, the operator can conveniently take out the detected product to be detected, and a new product to be detected is put into the machine table for next detection. The upper support plate 2 and the lower support plate 1 are rapidly separated, so that the continuity and the high efficiency of the detection process can be improved.
The invention provides a method for detecting the air tightness of a metal bipolar plate of a fuel cell, which comprises the steps of firstly, mounting a lower support plate 1 of a detection clamp on a lower fixing plate 4 of a machine table, and mounting an upper support plate 2 of the detection clamp on an upper fixing plate 41 of the machine table; placing a product to be tested on the lower supporting plate 1, and positioning the product to be tested; then pushing the upper support plate 2 to move along the direction approaching to the lower support plate 1, and pressing the product to be tested through a first sealing piece positioned on the upper support plate 2 and a second sealing piece positioned on the lower support plate 1 so as to separate N sealing areas on the product to be tested, wherein N is a positive integer; secondly, the air supply assembly respectively inputs test air into N sealing areas according to a preset air pressure value, and the detection assembly acquires the test air pressure value in the sealing areas; finally, comparing the test air pressure value with a standard air pressure value to judge whether the air tightness of the product to be tested is qualified or not; if yes, the upper support plate 2 is pushed to be separated from the lower support plate 1, and the product to be tested is taken out. After the product to be measured is placed between the lower supporting plate 1 and the upper supporting plate 2, the first sealing piece positioned on the upper supporting plate 2 and the second sealing piece positioned on the lower supporting plate 1 clamp the product to be measured from two sides of the product to be measured, N sealing areas are formed on the product to be measured, the air supply assembly and the detection assembly work cooperatively, the test air pressure value of each sealing area is measured quickly, whether the air tightness of the product to be measured is qualified can be judged quickly and accurately by comparing the test air pressure value with the standard air pressure value, and then the air tightness detection of a large number of bipolar plates is realized quickly, so that the detection efficiency is improved. Therefore, the technical effect of being capable of rapidly detecting the air tightness of a large number of bipolar plates and being high in detection efficiency is achieved.
In order to describe the fuel cell metal bipolar plate gas tightness detection clamp in detail, the embodiment of the application describes the method for detecting the gas tightness of the metal bipolar plate of the fuel cell in detail, and based on the same conception, the application also provides the fuel cell metal bipolar plate gas tightness detection clamp, and the detail is shown in the second embodiment.
Example two
Referring to fig. 2 and 3, fig. 2 is a schematic structural diagram of a fixture for detecting the air tightness of a metal bipolar plate of a fuel cell according to an embodiment of the present invention, and fig. 3 is a schematic structural diagram of a sealing assembly 3 in the fixture for detecting the air tightness of a metal bipolar plate of a fuel cell according to an embodiment of the present invention. The second embodiment of the invention provides a clamp for detecting the air tightness of a metal bipolar plate of a fuel cell, which comprises an upper support plate 2, a sealing assembly 3, an air supply assembly, a detection assembly and a lower support plate 1 for supporting a product to be detected, wherein the lower support plate 1 is arranged on a lower fixing plate 4 of a machine table; the upper supporting plate 2 is arranged on an upper fixing plate 41 of the machine table, and the product to be tested is positioned between the upper supporting plate 2 and the lower supporting plate 1; the sealing assembly 3 comprises a first sealing element arranged on the upper supporting plate 2 and a second sealing element arranged on the lower supporting plate 1, wherein the first sealing element is opposite to the second sealing element, so that N sealing areas are separated from the product to be tested through the first sealing element and the second sealing element; the gas supply assembly is used for inputting test gas into the sealing areas respectively, and the detection assembly is used for obtaining the test gas pressure value in the sealing areas. The lower support plate 1 is provided with air passages 11 the same as the N sealing areas in number, and the air passages 11 are communicated with the corresponding sealing areas; the air supply assembly comprises an air pump and pipelines with the same number as N sealing areas, the pipelines are respectively communicated with the air pump and the corresponding air passage 11, and the pipelines are provided with the detection assembly. The first sealing piece and the second sealing piece are both silica gel sealing rings, and the thickness of the first sealing piece and the thickness of the second sealing piece are both in the range of 0.2 mm to 0.35 mm.
Specifically, test gas that air pump produced in the air feed subassembly carries the inside to the sealing area through pipeline and air flue 11 in proper order, can be provided with the inlet port in one side of lower backup pad 1, and the inside of lower backup pad 1 is provided with hollow form gas passage, and the surface of lower backup pad 1 is provided with and venthole, and an inlet port, a gas passage and a venthole intercommunication each other form an air flue 11, and this venthole is located a sealing area, and the test gas of pipeline transport can get into the inside of this sealing area through inlet port, gas passage and venthole in proper order promptly. After the first sealing element and the second sealing element in the sealing assembly 3 compress the product to be tested from two sides of the product to be tested, a sealing area is formed on the product to be tested by the first sealing element and the second sealing element, the thickness of the first sealing element is the height of the first sealing element along the direction perpendicular to the surface of the product to be tested, the thickness of the second sealing element is the height of the second sealing element along the direction perpendicular to the surface of the product to be tested, when the value range of the thickness of the first sealing element is 0.2 mm to 0.35 mm, the value range of the thickness of the second sealing element is also 0.2 mm to 0.35 mm, the first sealing element and the second sealing element have better sealing effect, and the silica gel sealing ring can uniformly distribute stress when bearing pressure, so that damage caused by overlarge local stress is reduced, and the service life is prolonged.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples only represent preferred embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A method for detecting the air tightness of a metal bipolar plate of a fuel cell, which is characterized by comprising the following steps:
Mounting a lower support plate of a detection clamp onto a lower fixing plate of a machine table, and mounting an upper support plate of the detection clamp onto an upper fixing plate of the machine table;
placing a product to be detected on the lower supporting plate, and positioning the product to be detected;
pushing the upper supporting plate to move along the direction close to the lower supporting plate, and pressing the product to be tested through a first sealing piece positioned on the upper supporting plate and a second sealing piece positioned on the lower supporting plate so as to separate N sealing areas on the product to be tested, wherein N is a positive integer;
the gas supply assembly inputs test gas into the N sealing areas respectively according to a preset gas pressure value, and the detection assembly acquires the test gas pressure value in the sealing areas;
Comparing the test air pressure value with a standard air pressure value to judge whether the air tightness of the product to be tested is qualified or not;
if yes, the upper supporting plate and the lower supporting plate are pushed to be separated to take out the product to be tested.
2. The method for detecting the air tightness of the metal bipolar plate of the fuel cell according to claim 1, wherein the positioning the product to be detected comprises: and a plurality of positioning blocks arranged on the product to be tested are respectively embedded into a plurality of positioning grooves positioned in the lower supporting plate, and a plurality of positioning blocks are arranged in one-to-one correspondence with a plurality of positioning grooves.
3. The method of claim 1, wherein the compressing the product under test with the first seal on the upper support plate and the second seal on the lower support plate comprises: moving the first sealing element along a direction close to and opposite to the second sealing element so as to compress the product to be tested from two sides of the product to be tested through the first sealing element and the second sealing element; wherein the value range of N is 3 to 5.
4. The method of claim 1, wherein the gas supply assembly respectively inputs test gases into the N sealing areas according to a preset gas pressure value comprises: communicating an air pipe with the air supply assembly and the N sealing areas respectively; the air supply assembly inputs the test air into the N sealing areas through the air pipes respectively according to a preset air pressure value; wherein the value range of the preset air pressure value is 190KPa to 230KPa.
5. The method of claim 4, wherein the detecting assembly obtaining a test air pressure value in the sealing region comprises: the air supply assembly stops inputting the test air into the air pipe according to preset time, and the test air pressure value in the sealing area is measured in the preset time through the detection assembly arranged on the air pipe.
6. The method for detecting the air tightness of the metal bipolar plate of the fuel cell according to claim 5, wherein the method comprises the following steps: the detection component is an air pressure tester, and the value range of the preset time is 10 seconds to 15 seconds.
7. The method of claim 1, wherein comparing the test air pressure value with a standard air pressure value to determine whether the air tightness of the product to be tested is acceptable comprises:
obtaining a difference value between the test air pressure value and the standard air pressure value;
If the difference value is smaller than or equal to 15KPa and the test air pressure value is smaller than the standard air pressure value, judging that the air tightness of the product to be tested is qualified;
And if the difference is larger than 15KPa, judging that the air tightness of the product to be tested is unqualified.
8. A clamp for fuel cell metal bipolar plate gas tightness detection, the clamp comprising: the device comprises an upper supporting plate, a sealing assembly, an air supply assembly, a detection assembly and a lower supporting plate for supporting a product to be detected, wherein the lower supporting plate is arranged on a lower fixing plate of a machine table; the upper supporting plate is arranged on an upper fixing plate of the machine table, and the product to be tested is positioned between the upper supporting plate and the lower supporting plate; the sealing assembly comprises a first sealing element arranged on the upper supporting plate and a second sealing element arranged on the lower supporting plate, wherein the first sealing element is opposite to the second sealing element, and N sealing areas are separated from the product to be tested through the first sealing element and the second sealing element; the gas supply assembly is used for inputting test gas into the sealing areas respectively, and the detection assembly is used for obtaining the test gas pressure value in the sealing areas.
9. The fixture for fuel cell metal bipolar plate tightness detection according to claim 8, wherein: the lower supporting plate is provided with air passages, the number of which is the same as that of the N sealing areas, and the air passages are communicated with the corresponding sealing areas; the air supply assembly comprises an air pump and pipelines with the same number as N sealing areas, the pipelines are respectively communicated with the air pump and the corresponding air passages, and the detection assembly is arranged on the pipelines.
10. The fixture for fuel cell metal bipolar plate tightness detection according to claim 8, wherein: the first sealing piece and the second sealing piece are both silica gel sealing rings, and the thickness of the first sealing piece and the thickness of the second sealing piece are both in the range of 0.2 mm to 0.35 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202410448773.XA CN118482870A (en) | 2024-04-15 | 2024-04-15 | Method and clamp for detecting air tightness of metal bipolar plate of fuel cell |
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| CN202410448773.XA CN118482870A (en) | 2024-04-15 | 2024-04-15 | Method and clamp for detecting air tightness of metal bipolar plate of fuel cell |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118687778A (en) * | 2024-08-29 | 2024-09-24 | 江苏金亚隆科技有限公司 | An airtightness detection device for ultra-thin graphite bipolar plates |
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- 2024-04-15 CN CN202410448773.XA patent/CN118482870A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118687778A (en) * | 2024-08-29 | 2024-09-24 | 江苏金亚隆科技有限公司 | An airtightness detection device for ultra-thin graphite bipolar plates |
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