CN117213765B - Pressure-balancing bipolar plate fixing tool, airtight testing device and testing method - Google Patents
Pressure-balancing bipolar plate fixing tool, airtight testing device and testing method Download PDFInfo
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- CN117213765B CN117213765B CN202311465401.XA CN202311465401A CN117213765B CN 117213765 B CN117213765 B CN 117213765B CN 202311465401 A CN202311465401 A CN 202311465401A CN 117213765 B CN117213765 B CN 117213765B
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- 238000012360 testing method Methods 0.000 title claims abstract description 45
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- 238000010998 test method Methods 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 abstract description 5
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 20
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The disclosure belongs to the technical field of hydrogen production by an electrolytic cell, and particularly relates to a bipolar plate fixing tool capable of balancing pressure, an airtight testing device and a testing method. The bipolar plate tooling includes: a lower jig; the upper jig is detachably fixed right above the lower jig; the floating plate is arranged between the upper jig and the lower jig, and the lower surface of the floating plate can be in fit contact with the upper surface of the lower jig; and the point contact is fixedly arranged at the center position of the upper surface of the floating plate and is connected with the center position of the lower surface of the upper jig in a point contact manner. Through the bipolar plate fixing tool, the point contact structure transmits pressure to the contact surface from the center of the upper tool, and the floating plate structure can be automatically aligned by gravity, so that the stress on two sides of the bipolar plate is uniform, and the testing accuracy of the bipolar plate airtight testing device is improved.
Description
Technical Field
The disclosure belongs to the technical field of hydrogen production by an electrolytic cell, and particularly relates to a bipolar plate fixing tool capable of balancing pressure, an airtight testing device and a testing method.
Background
The Proton Exchange Membrane (PEM) water electrolysis hydrogen production technology is the reverse reaction of proton exchange membrane fuel cell reaction, and is based on the principle that voltage is applied to two ends of a polar plate, water is supplied to an electrolysis tank, and water is decomposed into oxygen O at an anode 2 Protons H + Electronic e - ，H + Across the proton exchange membrane to the cathode where it is separated from e - Hydrogen is generated. The PEM water electrolysis has the obvious advantages of high current density, small volume of the electrolysis bath, flexible operation, contribution to rapid load change and the like.
The bipolar plate, which is one of the core components of the cell, directly affects the performance of the overall cell. It is required to have the characteristics of good electric conductivity, thermal conductivity, corrosion resistance, high mechanical strength, gas impermeability and the like. Thus, in the development and manufacture of bipolar plates, the hermetic testing of the bipolar plates is important.
However, when performing performance testing of a bipolar plate using an existing bipolar plate airtight testing apparatus, there are cases where accuracy is difficult to ensure.
Disclosure of Invention
The disclosure finds that one of the important reasons that the accuracy of the bipolar plate airtight testing device is difficult to ensure is that in the conventional fixing tool of the bipolar plate airtight testing device, the degree of freedom of the upper tool is often 0, automatic alignment cannot be performed, and even compression of the upper side and the lower side of the bipolar plate cannot be completely ensured. This problem can be ameliorated by structural modification of the bipolar plate fixing tool.
In this regard, the present disclosure first provides a bipolar plate fixing tool, which includes: a lower jig; the upper jig is detachably fixed right above the lower jig; the floating plate is arranged between the upper jig and the lower jig, and the lower surface of the floating plate can be in fit contact with the upper surface of the lower jig; and the point contact is fixedly arranged at the center position of the upper surface of the floating plate and is connected with the center position of the lower surface of the upper jig in a point contact manner.
Preferably, the upper surface of the point contact is a curved surface protruding upwards, and the highest point of the curved surface is the point contact position of the point contact and the center position of the lower surface of the upper jig.
As a more preferable scheme, the upper surface of the point contact is in a three-dimensional symmetrical pattern, and the symmetry axis vertically passes through the point contact position of the point contact and the center position of the lower surface of the upper jig.
As a further preferable scheme, the upper surface of the point contact is a spherical surface protruding upwards, and the highest point of the spherical surface is a point contact position of the point contact and the center position of the lower surface of the upper jig.
As an optimal scheme, the bipolar plate fixing tool further comprises a load sensor, and the load sensor is arranged at the contact position of the point contact head and the lower surface of the upper tool.
As an optimal scheme, the bipolar plate fixing tool further comprises a load sensor, wherein the load sensor is fixedly arranged at the center of the upper surface of the floating plate, and the top of the load sensor comprises the structure of the point contact.
As a preferable scheme, a limiting block is arranged on the upper surface of the lower jig and used for limiting the relative position of the floating plate and the lower jig.
As a preferable scheme, a plurality of screw holes are formed in the edge positions of the upper jig and the lower jig, and the upper jig and the lower jig are detachably fixed through screws penetrating through the screw holes and nuts matched with the screw holes.
As a preferable scheme, the centers of gravity of the upper jig, the point contact head, the floating plate and the lower jig are on a vertical line, and the vertical line passes through the point contact position of the point contact head and the center position of the lower surface of the upper jig.
The disclosure also provides a bipolar plate airtight testing device, which comprises the bipolar plate fixing tool.
Preferably, the bipolar plate airtight testing device further comprises:
the force application component is used for applying force to the lower jig and/or the upper jig, so that the bipolar plate fixing tool clamps the bipolar plate and a bipolar plate cavity is formed at the bipolar plate;
and an inflation member for inflating a gas within the bipolar plate chamber.
Preferably, the bipolar plate airtight testing apparatus further comprises a pressure detecting part for detecting a gas pressure in the bipolar plate chamber.
Preferably, the force application component comprises a supporting table and a force application member, the bipolar plate fixing tool is arranged between the supporting table and the force application member, and the force application member applies force to the lower jig and/or the upper jig, so that the bipolar plate fixing tool clamps the bipolar plate, and a bipolar plate cavity is formed at the bipolar plate.
The present disclosure also provides a bipolar plate gas tightness test method comprising: the bipolar plate fixing tool is used; or, using the bipolar plate airtight testing device; placing a bipolar plate between the lower jig and the floating plate, and applying force to the lower jig and/or the upper jig to enable the bipolar plate fixing tool to clamp the bipolar plate and form a bipolar plate chamber at the bipolar plate; and then filling gas into the bipolar plate chamber, and monitoring the air tightness in the bipolar plate chamber within a certain time.
The utility model discloses a through above-mentioned bipolar plate fixed frock, the contact face is transmitted to the contact surface from last tool center with pressure to the point contact structure, and the floating plate structure can rely on gravity automatic alignment to make bipolar plate both sides atress even, and improved bipolar plate airtight testing arrangement's test accuracy.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the prior art, the drawings that are required in the detailed description or the prior art will be briefly described, it will be apparent that the drawings in the following description are some embodiments of the present disclosure, and other drawings may be obtained according to the drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 is a schematic diagram of the positions of a lower jig, a floating plate and a point contact of the bipolar plate fixing tool provided in embodiment 1 of the present disclosure.
Fig. 2 is a front view of the positions of the lower jig, floating plate and point contact of the bipolar plate fixing tool provided in embodiment 1 of the present disclosure.
Fig. 3 is a front view of the bipolar plate fixing tool provided in embodiment 1 of the present disclosure.
Fig. 4 is a partially enlarged front view at a in fig. 3.
Fig. 5 is a schematic diagram of the stress of the bipolar plate fixing tool in fig. 3 a during operation.
In the figure, 1, a lower jig; 11. a limiting block; 2. an upper jig; 3. a floating plate; 4. a point contact.
Detailed Description
The following describes specific embodiments of the present disclosure in detail. It will be understood that the embodiments described herein are for illustration and explanation only and are not intended to limit the present disclosure, as many modifications and variations may be made to the present disclosure by those skilled in the art without departing from the scope or spirit of the present disclosure. For example, features illustrated or described as part of one embodiment can be used on another embodiment to yield still a further embodiment.
Unless otherwise defined, all terms (including technical and scientific terms) used in the disclosure have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. By way of further guidance, the following definitions are used to better understand the teachings of the present disclosure. The terminology used in the description of the disclosure herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure.
The term "and/or," "and/or," as used in this disclosure, includes any one of two or more of the listed items in relation to each other, as well as any and all combinations of the listed items in relation to each other, including any two of the listed items in relation to each other, any more of the listed items in relation to each other, or all combinations of the listed items in relation to each other.
The terms "comprising," "including," and "comprising," as used in this disclosure, are synonymous, inclusive or open-ended, and do not exclude additional, unrecited members, elements, or method steps.
In the present disclosure, the descriptions of "plural", and the like refer to 2 or more in number unless otherwise specified.
In the present disclosure, the technical features described in an open manner include a closed technical scheme composed of the listed features, and also include an open technical scheme including the listed features.
In this disclosure, "preferred," "better," "preferred," and "better" are merely examples or embodiments that are more effective, and it should be understood that they do not limit the scope of the disclosure. In this disclosure, "optional," "optional," and "optional" refer to the presence or absence of, that is, either one of the two parallel schemes is selected from "with" or "without". If multiple "alternatives" occur in a technical solution, if no particular description exists and there is no contradiction or mutual constraint, then each "alternative" is independent.
The present disclosure relates to a bipolar plate fixing tool, which includes: a lower jig 1; the upper jig 2 is detachably fixed right above the lower jig 1; the floating plate 3 is arranged between the upper jig 2 and the lower jig 1, and the lower surface of the floating plate 3 can be in fit contact with the upper surface of the lower jig 1; and the point contact 4 is fixedly arranged at the center position of the upper surface of the floating plate 3, and the point contact 4 is connected with the center position of the lower surface of the upper jig 2 in a point contact manner.
When the upper jig 2 and the lower jig 1 are not parallel enough, pressure can be transmitted to the floating plate 3 from the center of the upper jig 2 through the ball head structure, and the floating plate 3 transmits force to the lower jig 1 after being automatically aligned by gravity, so that the pressure born by two sides of the bipolar plate is ensured to be uniform.
In the present disclosure, the lower surface of the floating plate 3 is configured to be capable of being in abutting contact with the upper surface of the lower jig 1, but this does not mean that the floating plate 3 is in direct abutting contact with the upper surface of the lower jig 1 when in operation, and the bipolar plate is placed between the floating plate 3 and the lower jig 1 when the bipolar plate is fixed.
In practice, the shape of the upper surface of the point contact 4 can be modified by a person skilled in the art to optimize the pressure transmission.
In some preferred embodiments, the upper surface of the point contact 4 is a curved surface protruding upward, and the highest point of the curved surface is the point contact position of the point contact 4 and the center position of the lower surface of the upper fixture 2.
In a more preferred embodiment, the upper surface of the point contact 4 is in a three-dimensional symmetrical pattern, and the symmetry axis thereof vertically passes through the point contact position of the point contact 4 and the center position of the lower surface of the upper jig 2.
Reference in this disclosure to "a stereosymmetrical pattern" at least satisfies: with the axis of the point contact position vertically passing through the center position of the lower surface of the upper jig 2 and the point contact head 4 as the symmetry axis, symmetrical points exist at each point on the three-dimensional symmetrical pattern (i.e., the upper surface of the point contact head 4).
In a further preferred embodiment, the upper surface of the point contact 4 is a spherical surface protruding upward, and the highest point of the spherical surface is the point contact position of the point contact 4 with the center position of the lower surface of the upper jig 2.
In some embodiments, the point contact 4 is fixed to the floating plate 3 by bolts.
In some embodiments, the pressure between the upper and lower tools can be controlled by a pressure sensor (such as a pressure sensor arranged in the force application component) arranged outside the bipolar plate fixing tool and combined with the assembly pressure when the bipolar plate is applied, so that the air tightness of the detection process and the protection of the fixture tool can be considered to a certain extent.
In some preferred embodiments, the bipolar plate fixing tool further comprises a load sensor, wherein the load sensor is arranged at a contact position of the point contact head 4 and the lower surface of the upper tool 2. Therefore, the pressure between the upper jig and the lower jig can be monitored in real time, and compared with a pressure sensor outside the bipolar plate fixing tool, the pressure between the upper jig and the lower jig can be measured more directly, so that the pressure between the upper jig and the lower jig can be controlled more accurately.
In some preferred embodiments, the bipolar plate fixing tool further comprises a load sensor, wherein the load sensor is fixedly arranged at the center of the upper surface of the floating plate 3, and the top of the load sensor comprises the structure of the point contact 4. That is, the point contact 4 described in the present invention is provided by the structure of the load sensor itself.
In some embodiments, a stopper 11 is disposed on the upper surface of the lower fixture 1, where the stopper 11 is used to limit the relative position of the floating plate 3 and the lower fixture 1.
In some embodiments, the stop block 11 is disposed around the outer periphery of the floating plate 3.
In some embodiments, a plurality of screw holes are formed at the edge positions of the upper jig 2 and the lower jig 1, and the upper jig 2 and the lower jig 1 are detachably fixed by screws penetrating through the screw holes and nuts matched with the screws.
In some embodiments, the centers of gravity of the upper jig 2, the point contact head 4, the floating plate 3 and the lower jig 1 are on a vertical line, and the vertical line passes through a point contact position of the point contact head 4 with a center position of a lower surface of the upper jig 2.
Reference to a "vertical line" in this disclosure refers to a line perpendicular to the horizontal.
In some specific embodiments, the screw is disposed at the edge positions of the upper jig 2 and the lower jig 1.
In some specific embodiments, the bipolar plate fixing tool further comprises a sealing structure (such as a gasket) disposed on the upper surface of the lower tool 1 and around the outer periphery of the floating plate 3.
The shapes and dimensions of the lower jig 1, the upper jig 2, and the floating plate 3 are not particularly limited in this disclosure, and those skilled in the art can set them in combination with the structure of the bipolar plate to be measured.
In some specific embodiments, the lower jig 1, the upper jig 2 and the floating plate 3 are respectively provided with two rectangular plates which are parallel to each other and have equal areas, and a supporting block is arranged between the rectangular plates.
In some embodiments, the lower jig 1 and the upper jig 2 have the same shape and size.
In some specific embodiments, the area of the lower surface of the floating plate 3 is slightly smaller than the area of the upper surface of the lower fixture 1, and is greater than or equal to the area of the contact surface of the bipolar plate to be tested.
The disclosure also provides a use method of the bipolar plate fixing tool: and placing a bipolar plate between the lower jig 1 and the floating plate 3, and applying force to the lower jig 1 and/or the upper jig 2 to enable the bipolar plate fixing tool to clamp the bipolar plate, so that a bipolar plate chamber is formed at the bipolar plate. In operation, the floating plate 3 is pressed above the bipolar plate to balance and transfer the forces above and below.
Further, the disclosure also provides a bipolar plate airtight testing device, which comprises the bipolar plate fixing tool.
In particular implementations, the skilled artisan can arrange other components of the bipolar plate hermetic test device in combination with common sense.
In some embodiments, the bipolar plate airtight testing apparatus further comprises: the force application component is used for applying force to the lower jig 1 and/or the upper jig 2, so that the bipolar plate fixing tool clamps the bipolar plate and a bipolar plate cavity is formed at the bipolar plate; and an inflation member for inflating a gas within the bipolar plate chamber.
In practice, the person skilled in the art can monitor the tightness of the bipolar plate chamber over a period of time in various ways. For example, the bipolar plate chamber is placed in a liquid and observed for the presence of bubbles over time.
In some embodiments, the bipolar plate gas tightness test device further comprises a pressure detection component for detecting the gas pressure in the bipolar plate chamber. The detection of the gas tightness in the bipolar plate chamber can also be achieved by monitoring the gas pressure change over a certain period of time.
In some embodiments, the force application member includes a support table and a force application member, the bipolar plate fixing tool is disposed between the support table and the force application member, and the force application member applies force to the lower jig 1 and/or the upper jig 2 such that the bipolar plate fixing tool clamps the bipolar plate and forms a bipolar plate chamber at the bipolar plate.
In particular embodiments, if the bipolar plate chamber includes a plurality of different chambers (e.g., hydrogen chamber, air chamber, coolant chamber, etc.), different gas filling passages may be provided in the gas-filling member for filling the different chambers of the bipolar plate chamber with gas.
The present disclosure further provides a bipolar plate gas tightness test method comprising: the bipolar plate fixing tool is used; or, using the bipolar plate airtight testing device; placing a bipolar plate between the lower jig 1 and the floating plate 3, and applying force to the lower jig 1 and/or the upper jig 2 to enable the bipolar plate fixing tool to clamp the bipolar plate and form a bipolar plate chamber at the bipolar plate; and then filling gas into the bipolar plate chamber, and monitoring the air tightness in the bipolar plate chamber within a certain time.
The bipolar plate fixing tool or the bipolar plate airtight testing device has a better detection effect when being applied to the airtight test of the bipolar plate of the electrolytic tank.
Embodiments of the present disclosure will be described in detail below with reference to examples. It should be understood that these examples are merely illustrative of the present disclosure and are not intended to limit the scope of the present disclosure. The experimental methods in the following examples, for which specific conditions are not noted, are preferably referred to in the guidelines given in the present disclosure, and may be according to the experimental manuals or conventional conditions in the art, and may be referred to other experimental methods known in the art, or according to the conditions suggested by the manufacturer.
In the specific examples described below, the measurement parameters relating to the raw material components, unless otherwise specified, may have fine deviations within the accuracy of weighing. Temperature and time parameters are involved, allowing acceptable deviations from instrument testing accuracy or operational accuracy.
Example 1
The embodiment firstly provides a bipolar plate fixing tool, as shown in fig. 1-4, which comprises a lower tool 1, an upper tool 2, a floating plate 3 and a load sensor.
The edge positions of the upper jig 2 and the lower jig 1 are provided with a plurality of screw holes, and the upper jig 2 and the lower jig 1 are detachably fixed through screws penetrating through the screw holes and nuts matched with the screw holes.
The floating plate 3 is arranged between the upper jig 2 and the lower jig 1, and the lower surface of the floating plate 3 can be in fit contact with the upper surface of the lower jig 1.
The load sensor is fixedly arranged at the central position of the upper surface of the floating plate 3 through a bolt, the top of the load sensor comprises a point contact head 4, and the point contact head 4 is connected with the central position of the lower surface of the upper jig 2 in a point contact manner. The upper surface of the point contact 4 is a spherical surface protruding upwards, and the highest point of the spherical surface is the point contact position of the point contact 4 and the center position of the lower surface of the upper jig 2.
The upper surface of lower tool 1 is equipped with stopper 11, stopper 11 is around the appearance periphery setting of floating plate 3 is used for restricting the floating plate 3 with lower tool 1's relative position.
The lower jig 1, the upper jig 2 and the floating plate 3 are respectively provided with two mutually parallel rectangular plates with equal areas, and supporting blocks are arranged between the rectangular plates. The shape and the size of the lower jig 1 are the same as those of the upper jig 2. The lower surface area of the floating plate 3 is slightly smaller than the upper surface area of the lower jig 1 and is larger than the contact surface area of the bipolar plate to be tested.
The center of gravity of the upper jig 2, the point contact head 4, the floating plate 3 and the lower jig 1 are on a vertical line, and the vertical line passes through the point contact position of the point contact head 4 and the center position of the lower surface of the upper jig 2.
The embodiment also provides a bipolar plate airtight testing device, which comprises the bipolar plate fixing tool, a force application component, an inflation component and a pressure detection component.
The force application component comprises a supporting table and a force application piece, the bipolar plate fixing tool is arranged between the supporting table and the force application piece, and the force application piece applies force to the upper tool 2, so that the bipolar plate fixing tool clamps the bipolar plate, and a bipolar plate cavity is formed at the bipolar plate.
The gas filling component is used for filling gas in the bipolar plate cavity.
The pressure detection component is for detecting a gas pressure in the bipolar plate chamber.
The embodiment further provides a method for testing the airtight performance of the bipolar plate of the electrolytic cell, which comprises the following steps: the bipolar plate is placed between the lower jig 1 and the floating plate 3 by using the bipolar plate airtight testing device, then the upper jig 2 and the lower jig 1 are connected by a screw rod and placed on a supporting table, the upper jig 2 is forced by a force application piece, so that the bipolar plate is clamped by the bipolar plate fixing tool, a bipolar plate cavity is formed at the bipolar plate, and a fastening piece is fixed by matching a nut on the screw rod so as to maintain a sealing state. And then the gas is filled into the bipolar plate cavity through the gas filling part, and the gas tightness in the bipolar plate cavity within a certain time is monitored through the pressure detection part.
As shown in fig. 5, when the upper jig 2 and the lower jig 1 are not uniformly pressed, the pressure can be transmitted to the floating plate 3 from the center of the upper jig 2 through the point contact ball head structure, and the floating plate 3 transmits the force to the lower jig 1 after being automatically aligned by gravity, so that the pressure applied to the two sides of the bipolar plate is uniform, and the testing accuracy of the bipolar plate airtight testing device is further improved.
Example 2
The present embodiment provides a bipolar plate fixing tool, which is different from embodiment 1 only in that: the upper surface of the point contact 4 is a three-dimensional symmetrical curved surface protruding upwards, and the symmetrical axis vertically passes through the point contact position of the point contact 4 and the center position of the lower surface of the upper jig 2.
When the fixing tool is used for the airtight test of the bipolar plate, the stress on two sides of the bipolar plate can be uniform, and the test accuracy of the airtight test device of the bipolar plate can be improved.
Example 3
The embodiment provides a bipolar plate fixing tool, which comprises a lower tool 1, an upper tool 2, a floating plate 3, a point contact 4 and a load sensor.
The edge positions of the upper jig 2 and the lower jig 1 are provided with a plurality of screw holes, and the upper jig 2 and the lower jig 1 are detachably fixed through screws penetrating through the screw holes and nuts matched with the screw holes.
The floating plate 3 is arranged between the upper jig 2 and the lower jig 1, and the lower surface of the floating plate 3 can be in fit contact with the upper surface of the lower jig 1.
The point contact 4 is fixedly arranged at the center position of the upper surface of the floating plate 3 through a bolt, and the point contact 4 is connected with the center position of the lower surface of the upper jig 2 in a point contact manner. The upper surface of the point contact 4 is a spherical surface protruding upwards, and the highest point of the spherical surface is the point contact position of the point contact 4 and the center position of the lower surface of the upper jig 2.
The load sensor is arranged on the lower surface of the upper jig 2 and corresponds to the contact position between the lower surface of the upper jig 2 and the point contact 4.
The upper surface of lower tool 1 is equipped with stopper 11, stopper 11 is around the appearance periphery setting of floating plate 3 is used for restricting the floating plate 3 with lower tool 1's relative position.
The lower jig 1, the upper jig 2 and the floating plate 3 are respectively provided with two mutually parallel rectangular plates with equal areas, and supporting blocks are arranged between the rectangular plates. The shape and the size of the lower jig 1 are the same as those of the upper jig 2. The lower surface area of the floating plate 3 is slightly smaller than the upper surface area of the lower jig 1 and is larger than the contact surface area of the bipolar plate to be tested.
The center of gravity of the upper jig 2, the point contact head 4, the floating plate 3 and the lower jig 1 are on a vertical line, and the vertical line passes through the point contact position of the point contact head 4 and the center position of the lower surface of the upper jig 2.
When the fixing tool is used for the airtight test of the bipolar plate, the pressure between the upper tool and the lower tool can be accurately monitored, and the airtightness in the detection process and the protection of the fixture tool are considered; meanwhile, the stress on two sides of the bipolar plate can be uniform, and the testing accuracy of the bipolar plate airtight testing device is improved.
The above examples merely represent a few embodiments of the present disclosure, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that variations and modifications can be made by those skilled in the art without departing from the spirit of the disclosure, which are within the scope of the disclosure.
Claims (14)
1. The utility model provides a bipolar plate fixes frock which characterized in that, it includes:
a lower jig (1);
the upper jig (2) is detachably fixed right above the lower jig (1);
the floating plate (3) is arranged between the upper jig (2) and the lower jig (1), and the lower surface of the floating plate (3) can be in fit contact with the upper surface of the lower jig (1);
the point contact head (4) is fixedly arranged at the center position of the upper surface of the floating plate (3), and the point contact head (4) is connected with the center position of the lower surface of the upper jig (2) in a point contact manner;
the pressure is transmitted to the contact surface from the center of the upper jig by the point contact structure, and the floating plate structure can be automatically aligned by gravity, so that the stress on two sides of the bipolar plate is uniform.
2. The bipolar plate fixing tool according to claim 1, wherein the upper surface of the point contact (4) is a curved surface protruding upwards, and the highest point of the curved surface is a point contact position between the point contact (4) and the central position of the lower surface of the upper tool (2).
3. The bipolar plate fixing tool according to claim 2, wherein the upper surface of the point contact head (4) is in a three-dimensional symmetrical pattern, and a symmetry axis of the point contact head vertically passes through a point contact position of the point contact head (4) and a center position of the lower surface of the upper tool (2).
4. The bipolar plate fixing tool according to claim 2, wherein the upper surface of the point contact head (4) is a spherical surface protruding upwards, and the highest point of the spherical surface is a point contact position between the point contact head (4) and the central position of the lower surface of the upper tool (2).
5. The bipolar plate fixing tool according to any one of claims 1-4, further comprising a load sensor arranged at a contact position of the point contact head (4) and the lower surface of the upper tool (2).
6. The bipolar plate fixing tool according to any one of claims 1-4, further comprising a load sensor fixedly arranged at the center of the upper surface of the floating plate (3), wherein the top of the load sensor comprises the structure of the point contact (4).
7. The bipolar plate fixing tool according to claim 1, wherein a limiting block (11) is arranged on the upper surface of the lower tool (1), and the limiting block (11) is used for limiting the relative position of the floating plate (3) and the lower tool (1).
8. The bipolar plate fixing tool according to claim 1, wherein a plurality of screw holes are formed in edge positions of the upper jig (2) and the lower jig (1), and the upper jig (2) and the lower jig (1) are detachably fixed through screws penetrating through the screw holes and nuts matched with the screw holes.
9. The bipolar plate fixing tool according to claim 1, wherein the centers of gravity of the upper jig (2), the point contact head (4), the floating plate (3) and the lower jig (1) are on a vertical line, and the vertical line passes through a point contact position of the point contact head (4) with a lower surface center position of the upper jig (2).
10. A bipolar plate airtight testing device, characterized in that it comprises a bipolar plate fixing tool according to any one of claims 1 to 9.
11. The bipolar plate hermetic test device as in claim 10, further comprising:
the force application component is used for applying force to the lower jig (1) and/or the upper jig (2) so that the bipolar plate fixing tool clamps the bipolar plate and a bipolar plate cavity is formed at the bipolar plate;
and an inflation member for inflating a gas within the bipolar plate chamber.
12. The bipolar plate hermetic test device of claim 11, further comprising a pressure detecting means for detecting a gas pressure in the bipolar plate chamber.
13. The bipolar plate airtight testing apparatus according to claim 11 or 12, wherein the force application member comprises a support table and a force application member, the bipolar plate fixture being provided between the support table and the force application member, the force application member applying force to the lower jig (1) and/or the upper jig (2) such that the bipolar plate fixture clamps a bipolar plate and forms a bipolar plate chamber at the bipolar plate.
14. A bipolar plate hermetic test method, comprising: use of a bipolar plate fixing tool according to any one of claims 1 to 9; or, using the bipolar plate airtight testing device according to any one of claims 10 to 13;
placing a bipolar plate between the lower jig (1) and the floating plate (3), and applying force to the lower jig (1) and/or the upper jig (2) to enable the bipolar plate fixing tool to clamp the bipolar plate and form a bipolar plate cavity at the bipolar plate; and then filling gas into the bipolar plate chamber, and monitoring the air tightness in the bipolar plate chamber within a certain time.
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| CN117213765A (en) | 2023-12-12 |
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