CN211206628U - Bipolar plate coating resistance measuring device - Google Patents
Bipolar plate coating resistance measuring device Download PDFInfo
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- CN211206628U CN211206628U CN201921815603.1U CN201921815603U CN211206628U CN 211206628 U CN211206628 U CN 211206628U CN 201921815603 U CN201921815603 U CN 201921815603U CN 211206628 U CN211206628 U CN 211206628U
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Abstract
The application provides a bipolar plate coating resistance measuring device, which comprises a temperature adjusting part, a pressing part and a measuring part; the measuring part comprises a measuring end which is contacted with a sample (5) to be measured; the pressing part comprises at least one pressing piece, the pressing piece can press and attach the measuring end and the sample (5) to be measured, and a heat exchange channel (12) is arranged on the pressing piece; the temperature adjusting part comprises a temperature adjusting unit (11), and the temperature adjusting unit (11) is communicated with the heat exchange channel (12). The embodiment of the utility model provides a bipolar plate coating resistance measuring device that provides can realize the accurate measurement to bipolar plate resistance under the different temperatures, improves the accuracy that detects.
Description
Technical Field
The application belongs to the technical field of fuel cells, and particularly relates to a bipolar plate coating resistance measuring device.
Background
The PEMFC is a clean and efficient energy conversion device, and the power generation efficiency is between 40 and 60 percent. The bipolar plate is one of the core components in the fuel cell, and has the characteristics of good electrical conductivity, strong corrosion resistance, good heat transfer effect, good ductility, light weight, small volume and the like.
The practical application scene of the fuel cell usually requires that the fuel cell can be quickly started at minus 30 ℃, then the temperature is quickly raised to reach about 80 ℃, and the electric energy is output in full power. The operating principle of a fuel cell dictates that it must operate in a liquid water environment. The common solution is to heat the stack after the auxiliary power supply is turned on, raise the temperature of the stack to above zero, and then start the fuel cell engine.
Another approach to solve the problem of low temperature start-up is for the skilled artisan to prepare negative temperature coefficient coating materials on the metallic bipolar plates, which coatings have the characteristic of high resistance at low temperatures and low resistance at high temperatures. After the fuel cell is started, the current heats the electric pile through the resistance heating of the bipolar plate, so that the electric pile quickly reaches the working environment temperature, and the resistance of the bipolar plate is quickly reduced along with the rise of the environment temperature.
Under the existing conditions, the resistance test of the bipolar plate can not truly reflect the resistance value of the bipolar plate under the low-temperature starting condition and the normal working environment, in particular to a material with negative temperature coefficient characteristics or a material with resistance value very sensitive to temperature. The accurate measurement of the resistance of the bipolar plate can be realized by no proper experimental equipment, and the problem in the process of developing the material of the bipolar plate with low-temperature starting is solved.
SUMMERY OF THE UTILITY MODEL
Therefore, the technical problem to be solved by the application is to provide a bipolar plate coating resistance measuring device, which can realize accurate measurement of bipolar plate resistance at different temperatures and improve the detection accuracy.
In order to solve the above problems, the present application provides a bipolar plate coating resistance measuring device, which includes a temperature adjusting portion, a pressing portion, and a measuring portion;
the measuring part comprises a measuring end which is contacted with a sample to be measured;
the pressing part comprises at least one pressing piece, the pressing piece can press and attach the measuring end and the sample to be measured, and a heat exchange channel is arranged on the pressing piece;
the temperature adjusting part comprises a temperature adjusting unit, and the temperature adjusting unit is communicated with the heat exchange channel.
Preferably, the heat exchange channel comprises an inlet end and an outlet end, the inlet end and the outlet end are both communicated with the temperature regulating unit, at least one part of the heat exchange channel is arranged inside the pressing piece, and a heat exchange agent of the temperature regulating unit can enter the heat exchange channel through the inlet end and enter the temperature regulating unit through the outlet end to form circulation.
Preferably, the pressing portion includes a first pressing member and a second pressing member, and the first pressing member and the second pressing member are disposed opposite to each other to press the measuring end and the sample to be measured between the first pressing member and the second pressing member.
Preferably, the measuring part further comprises a resistance detection device, the measuring end comprises a first contact piece and a second contact piece, the first contact piece and the second contact piece are connected with the resistance detection device, the first contact piece is located between the first pressing piece and the sample to be detected, and the second contact piece is located between the second pressing piece and the sample to be detected;
and/or, the measuring part still includes first conducting layer and second conducting layer, first conducting layer with the sample that awaits measuring contacts, and is located the sample that awaits measuring is close to one side of first compressing tightly the piece, the second conducting layer with the sample that awaits measuring contacts, and is located the sample that awaits measuring is close to one side that the second compressed tightly the piece.
Preferably, the first and second conductive layers are carbon paper, and/or the first and second contacts are gold-plated plates.
Preferably, the temperature adjusting range of the temperature adjusting part is-65 ℃ to 100 ℃.
Advantageous effects
The embodiment of the utility model provides a bipolar plate coating resistance measuring device that provides can realize the accurate measurement to bipolar plate resistance under the different temperatures, improves the accuracy that detects.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present application.
The reference numerals are represented as:
11. a temperature adjusting unit; 12. a heat exchange channel; 13. a connecting hose; 21. a first pressing member; 22. a second pressing member; 31. a first contact member; 32. a second contact member; 33. a resistance detection device; 41. a first conductive layer; 42. a second conductive layer; 5. and (5) testing the sample to be tested.
Detailed Description
Referring to fig. 1 in combination, according to an embodiment of the present application, a bipolar plate coating resistance measuring device includes a temperature regulating portion, a pressing portion, and a measuring portion; the measuring part comprises a measuring end which is contacted with a sample 5 to be measured; the pressing part comprises at least one pressing piece, the pressing piece can press and attach the measuring end and the sample 5 to be measured, and a heat exchange channel 12 is arranged on the pressing piece; the temperature adjusting part comprises a temperature adjusting unit 11, and the temperature adjusting unit 11 is communicated with the heat exchange channel 12. Through setting up temperature regulation portion, can realize the accurate measurement to bipolar plate resistance under the different temperatures, improve the accuracy that detects.
Further, the temperature adjusting unit 11 is a cryostat, and is configured to adjust an ambient temperature of the sample 5 to be measured, so that the sample 5 to be measured is within a predetermined temperature environment.
The heat exchange channel 12 comprises an inlet end and an outlet end, the inlet end and the outlet end are communicated with the temperature adjusting unit 11, at least one part of the heat exchange channel 12 is arranged inside the pressing piece, a heat exchange agent of the temperature adjusting unit 11 can enter the heat exchange channel 12 through the inlet end and enter the temperature adjusting unit 11 through the outlet end so as to form circulation, and the temperature stability of the sample 5 to be detected is guaranteed.
Furthermore, the inlet end and the outlet end are respectively provided with a connecting hose 13, and the temperature adjusting unit 11 is communicated with the heat exchange channel 12 through the connecting hose 13 and the connecting hose 13.
Furthermore, the temperature adjusting unit 11 discharges the heat exchange agent reaching the preset temperature into the connecting hose 13, and the heat exchange agent enters the heat exchange channel 12 through the connecting hose 13, the heat exchange channel 12 is arranged in the pressing piece in a concave shape, the heat exchange agent enters from one end of the pressing piece and is discharged from the other end of the pressing piece, the heat exchange agent enters the temperature adjusting unit 11 again through the other connecting hose 13, and the temperature adjusting unit 11 heats or cools the heat exchange agent again to the preset temperature for repeated use.
The pressing portion includes a first pressing member 21 and a second pressing member 22, and the first pressing member 21 and the second pressing member 22 are disposed opposite to each other to press the measuring end and the test sample 5 to be measured between the first pressing member 21 and the second pressing member 22.
Through setting up first compressing tightly 21 and second compressing tightly 22, press from both sides tight measuring part and the sample 5 that awaits measuring simultaneously from two upper and lower directions, guaranteed stable fixed.
Further, heat exchange channels 12 are arranged in the first pressing piece 21 and the second pressing piece 22 and are communicated with the temperature adjusting unit 11 through the connecting hose 13, so that the temperature of the sample 5 to be measured can be adjusted in the upper direction and the lower direction at the same time, the temperature stability and the balance of the sample 5 to be measured are guaranteed, and the temperature adjusting speed is increased.
Further, the first pressing member 21 and the second pressing member 22 are symmetrically disposed.
The measuring part further comprises a resistance detection device 33, the measuring end comprises a first contact piece 31 and a second contact piece 32, the first contact piece 31 and the second contact piece 32 are connected with the resistance detection device 33, the first contact piece 31 is positioned between the first pressing piece 21 and the sample 5 to be measured, and the second contact piece 32 is positioned between the second pressing piece 22 and the sample 5 to be measured; in this embodiment, the measuring unit further includes a first conductive layer 41 and a second conductive layer 42, the first conductive layer 41 is in contact with the sample 5 to be measured and is located on a side of the sample 5 to be measured close to the first pressing member 21, and the second conductive layer 42 is in contact with the sample 5 to be measured and is located on a side of the sample 5 to be measured close to the second pressing member 22.
Further, the first contact member 31 is located at the top of the sample 5 to be measured, the second contact member 32 is located at the bottom of the sample 5 to be measured, and the horizontal width and the length of the first contact member 31 and the second contact member 32 are not less than the horizontal width and the length of the sample 5 to be measured, so that the first contact member 31 and the second contact member 32 can accurately acquire the current information of the sample 5 to be measured.
Further, the dimension width of the pressing member is larger than the dimension widths of the first contact 31 and the second contact 32, so that the pressing member can completely cover the top surface of the first contact 31 and the bottom surface of the second contact 32.
Further, the first contact 31 and the second contact 32 are communicatively connected to the resistance detection device 33.
Further, the first conductive layer 41 and the second conductive layer 42 are made of a diffusion layer material.
Specifically, in the present embodiment, the first conductive layer 41 and the second conductive layer 42 are carbon paper, and the first contact 31 and the second contact 32 are gold-plated plates.
Further, the pressing portion is a universal press, the universal press presses the measuring portion and the sample 5 to be measured through the first pressing member 21 and the second pressing member 22, and the sample 5 to be measured, the first conductive layer 41 and the second conductive layer 42 are not damaged during pressing.
The temperature adjusting range of the temperature adjusting part is-65 ℃ to 100 ℃.
Further, the temperature adjusting range of the temperature adjusting part is-30 ℃ to 100 ℃, preferably-30 ℃ to 80 ℃.
In another aspect of this embodiment, a method for using the above apparatus is provided, which includes the following steps:
1) clamping and fixing the sample 5 to be measured and the measuring end of the measuring part by using a pressing part;
2) starting a temperature adjusting part, and setting the temperature adjusting temperature of the temperature adjusting part to enable the temperature of the sample 5 to be measured to reach the set temperature;
3) the measuring unit is turned on to measure the resistance value of the sample 5.
Further, the equipment is shut down after the measurement is finished.
Furthermore, the sample 5 to be measured is tightened by adjusting the pressure of the universal press.
Further, the contact resistance and the bulk resistance at the measurement temperature can be obtained by measuring the obtained resistance value.
Further, in step 2), different temperature point values are set by the temperature adjustment unit, and the resistance value of the sample 5 to be measured among the different temperature point values is measured.
Further, in step 2), a temperature section is set by using the temperature adjusting portion, and the temperature of the sample 5 to be measured is increased or decreased in the temperature section by the temperature adjusting portion, thereby continuously measuring the resistance value of the sample 5 to be measured in the temperature section.
Further, a point line graph of the resistance value and the temperature is drawn in the continuous measurement.
When the measuring portion includes the first and second conductive layers 41 and 42, and the first and second contacts 31 and 32, the first contact 31, the first conductive layer 41, the test sample 5 to be tested, the second contact 32, and the second conductive layer 42 are press-fitted by the pressing portion.
The embodiment of the utility model provides a bipolar plate coating resistance measuring device that provides can realize the accurate measurement to bipolar plate resistance under the different temperatures, improves the accuracy that detects.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.
Claims (6)
1. The bipolar plate coating resistance measuring device is characterized by comprising a temperature adjusting part, a pressing part and a measuring part;
the measuring part comprises a measuring end which is contacted with a sample (5) to be measured;
the pressing part comprises at least one pressing piece, the pressing piece can press and attach the measuring end and the sample (5) to be measured, and a heat exchange channel (12) is arranged on the pressing piece;
the temperature adjusting part comprises a temperature adjusting unit (11), and the temperature adjusting unit (11) is communicated with the heat exchange channel (12).
2. The bipolar plate coating resistance measuring device of claim 1, wherein the heat exchanging channel (12) comprises an inlet end and an outlet end, the inlet end and the outlet end are both communicated with the temperature regulating unit (11), at least a part of the heat exchanging channel (12) is arranged inside the pressing member, and the heat exchanging agent of the temperature regulating unit (11) can enter the heat exchanging channel (12) through the inlet end and enter the temperature regulating unit (11) through the outlet end to form a circulation.
3. The bipolar plate coating resistance measuring device of claim 1, wherein the compression portion comprises a first compression member (21) and a second compression member (22), the first compression member (21) and the second compression member (22) being disposed opposite to each other to compress the measuring end and the sample (5) to be measured between the first compression member (21) and the second compression member (22).
4. The bipolar plate coating resistance measuring device of claim 3, wherein the measuring portion further comprises a resistance detecting device (33), the measuring end comprises a first contact member (31) and a second contact member (32), the first contact member (31) and the second contact member (32) are connected with the resistance detecting device (33), the first contact member (31) is located between the first pressing member (21) and the test piece (5) to be measured, and the second contact member (32) is located between the second pressing member (22) and the test piece (5) to be measured;
and/or, the measuring part still includes first conducting layer (41) and second conducting layer (42), first conducting layer (41) with the sample (5) that awaits measuring contacts, and is located the sample (5) that awaits measuring is close to one side of first pressure piece (21), second conducting layer (42) with the sample (5) that awaits measuring contacts, and is located the sample (5) that awaits measuring is close to one side of second pressure piece (22).
5. The bipolar plate coating resistance measuring device of claim 4, wherein the first and second electrically conductive layers (41, 42) are carbon paper and/or the first and second contacts (31, 32) are gold plated.
6. The bipolar plate coating resistance measuring apparatus of claim 1, wherein the temperature adjustment part has a temperature adjustment range of-65 ℃ to 100 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921815603.1U CN211206628U (en) | 2019-10-25 | 2019-10-25 | Bipolar plate coating resistance measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921815603.1U CN211206628U (en) | 2019-10-25 | 2019-10-25 | Bipolar plate coating resistance measuring device |
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| CN211206628U true CN211206628U (en) | 2020-08-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114899429A (en) * | 2022-07-13 | 2022-08-12 | 潍柴动力股份有限公司 | Bipolar plate bonding tool |
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2019
- 2019-10-25 CN CN201921815603.1U patent/CN211206628U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114899429A (en) * | 2022-07-13 | 2022-08-12 | 潍柴动力股份有限公司 | Bipolar plate bonding tool |
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