CN112234233A - Fuel cell internal current distribution on-line detection device - Google Patents
Fuel cell internal current distribution on-line detection device Download PDFInfo
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- CN112234233A CN112234233A CN202011078944.2A CN202011078944A CN112234233A CN 112234233 A CN112234233 A CN 112234233A CN 202011078944 A CN202011078944 A CN 202011078944A CN 112234233 A CN112234233 A CN 112234233A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/04537—Electric variables
- H01M8/04574—Current
- H01M8/04589—Current of fuel cell stacks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/08—Measuring current density
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/04537—Electric variables
- H01M8/04574—Current
- H01M8/04582—Current of the individual fuel cell
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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
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Abstract
The invention provides an on-line detection device for current distribution in a fuel cell, which comprises a double-sided subarea acquisition board, a signal processing module and an upper computer; the double-sided partition collecting plate is arranged between any two adjacent fuel cell units and consists of a plurality of collecting units, wherein each collecting unit comprises a top layer copper-clad gold-plating partition, a top layer PCB insulating material layer, a top layer wiring layer, a middle PCB insulating material layer, a bottom layer wiring layer, a bottom layer PCB insulating material layer and a bottom layer copper-clad gold-plating partition; the middle PCB insulating material layer is provided with a hollow area, and the inside of the hollow area is filled with sampling resistors which are respectively connected with the metallized through holes in the middle of the top layer copper-clad gold-plated subarea and the bottom layer copper-clad gold-plated subarea; the signal processing module is used for processing the signals of the potential differences at two ends of the sampling resistor acquired through the top routing layer and the bottom routing layer, and then displaying and analyzing the signals in real time; the on-line detection device can detect the current density distribution condition at any position in the galvanic pile.
Description
Technical Field
The invention belongs to the field of fuels, and particularly relates to an on-line detection device for internal current distribution of a fuel cell.
Background
With the shortage of traditional energy sources such as fossil and the continuous warming of global climate, human faces huge energy crisis and environmental crisis, and a new, efficient and clean energy source is urgently needed to be searched to gradually replace the traditional fossil energy source. Proton Exchange Membrane Fuel Cells (PEMFCs) are high-efficiency and clean energy devices, and have become hot spots of research in various countries due to their excellent performance, and have been gradually applied to the fields of aerospace, ships, automobiles, backup power sources, and the like.
In practical applications, the fuel cell product usually requires a plurality of single fuel cell units to be connected in series to form a higher power generation device, and structurally, the fuel cell product is characterized in that bipolar plates and membrane electrodes are sequentially stacked and assembled into a whole, namely a stack. The lifetime and performance of pem fuel cells are still the major shortboards that have limited their development. The lifetime and performance of pem fuel cells are affected by many factors, one of which is directly reflected in the current density distribution within the cell. Uneven distribution of current density in a reactor reaction area (MEA) can cause differences in internal voltage and in-plane current, reducing the utilization of reactants and electrocatalysts, reducing cell efficiency and accelerating cell aging, ultimately resulting in reduced cell life. Therefore, it is necessary to design an online partition detection device capable of acquiring the internal current distribution change during the operation of the fuel cell to monitor the performance and the expected life of the cell in real time.
The partition collecting plate of the traditional online partition detecting device is a single-side partition, namely only one side of the collecting plate is distributed with copper-coated gold-plated partitions distributed in a dense matrix. The single-sided subarea collection plate is placed at the position, close to an end plate, of the cathode or the anode of the galvanic pile to replace a current collection plate, the sampling resistors are connected with copper foils on the subarea collection plate through leads, voltage at two ends of each sampling resistor is collected to obtain current flowing through each subarea, and the current of each subarea flows transversely on the plane of the subarea collection plate after flowing through the sampling resistors and finally converges at the current collection hole connected with a load line. When the power and the current of the electric pile are small, the design of the single-side subarea collecting plate can also meet the requirement, but when the area of the reaction area of the electric pile is increased, the current can even reach hundreds of amperes during operation, so that the large current is dangerous to flow transversely on the subarea collecting plate, the current near the collecting hole is particularly gathered, the thin copper layer on the surface of the subarea collecting plate can generate higher temperature rise through the large current, and in addition, the operation environment temperature of the electric pile per se can reach 70-80 ℃, the risk of plate explosion can be generated, and the design is unacceptable for the hydrogen fuel cell electric pile sensitive to open fire.
The traditional online partition detection device has many design limitations. The partition test board is placed close to the outermost battery unit, the measured current distribution flowing through the battery unit cannot directly reflect the specific current distribution condition of other battery units of the whole pile, an external sampling resistor is required to be placed on the outer side of the circuit board, and the test partition and the sampling resistor are connected through copper foil. Due to design and process limitations, such as different lengths of wires from each segment to the electronic load, and different amounts of solder at the two ends of the sampling resistor, the impedance of the non-sampling resistor varies from channel to channel. And because the impedance of the sampling resistor is very small, generally from several milliohms to tens of milliohms, the impedance consistency among the sub-partitions is greatly influenced, and the current density distribution of each partition is influenced to a certain extent.
In order to solve the problem that the impedance of different sub-partition channels of the traditional single-face partition acquisition board is different, the existing partition battery device is optimized in design to a certain extent, and a plurality of schemes are provided. The more representative scheme is equal-length wiring, namely, a path for connecting a load, which flows through the sampling resistor and then reaches the current collecting hole, of each partition is uniform to be as long as the path is in a snake-shaped wiring mode, so that the impedance of each partition channel can be ensured to be equal, and the influence of unequal impedance on the current density distribution of each partition is avoided. However, the use of the serpentine wiring and other methods for equal-length wiring means that the length of the channel of each partition is greatly increased, the impedance is increased, and particularly when the width of the lead of the channel is not sufficient, the impedance on the line is far greater than the sampling resistance, and the precision is difficult to control, so that the selection of the high-precision sampling resistance loses significance. Meanwhile, difficulty is brought to a subsequent measuring link, and a specific resistance value on each channel is difficult to measure by a common measuring instrument.
In addition, the existing online partition detection device basically only has a few or more than ten partitions due to the limitation of partition acquisition board space, device precision and other factors, cannot be applied to large fuel cell galvanic pile required in practical application, has certain scientific research significance, and has little practical application significance.
Therefore, it is desirable to design a multi-partitioned battery device that can be inserted between a plurality of battery cells of a stack, and that has a small impedance of each sub-partitioned channel and maintains a high uniformity.
Disclosure of Invention
The invention provides an on-line detection device for current distribution in a fuel cell, which aims to solve the problems that the current density distribution of a middle cell unit of a galvanic pile cannot be directly monitored by the conventional device, and the measurement precision and consistency are insufficient.
The specific technical scheme of the invention is as follows:
the on-line detection device for the current distribution in the fuel cell is characterized by comprising a double-sided subarea acquisition board, an upper computer and signal processing modules positioned at two ends of the double-sided subarea acquisition board; the double-sided subarea acquisition board is a multilayer printed circuit board, is arranged between any two adjacent fuel cell units, and is used for detecting subarea current density distribution in the fuel cell on line;
the double-sided partition collecting Board comprises a plurality of collecting units which are arranged in an array, wherein each collecting unit comprises a top layer copper-clad gold-plated partition, a top layer PCB (Printed Circuit Board) insulating material layer, a top layer wiring layer, a middle PCB insulating material layer, a bottom layer wiring layer, a bottom layer PCB insulating material layer and a bottom layer copper-clad gold-plated partition which are sequentially arranged from top to bottom; the top copper-clad and gold-plated subareas of the adjacent acquisition units are electrically isolated from each other, and the bottom copper-clad and gold-plated subareas of the adjacent acquisition units are electrically isolated from each other;
a hollow area is arranged in the middle of the middle PCB insulating material layer, a sampling resistor is buried in the hollow area, and the sampling resistor is respectively connected with the metalized through hole in the middle of the top layer copper-clad gold-plated subarea and the bottom layer copper-clad gold-plated subarea through a lead;
the signal processing module is used for processing signals of potential differences at two ends of the sampling resistor acquired through the top routing layer and the bottom routing layer, and then transmitting the processed signals to an upper computer for real-time display and analysis.
Further, the thickness of the top copper-plated gold layer and the thickness of the bottom copper-plated gold layer are both 140-175 microns; the thicknesses of the top PCB insulating material layer, the middle PCB insulating material layer and the bottom PCB insulating material layer are all 0.5-1 mm.
Further, the signal processing module comprises a signal amplifier, a multi-channel analog-to-digital converter and a microcontroller; the potential difference is amplified by the signal amplifier and then transmitted to the microcontroller for processing through the multi-channel analog-to-digital converter.
Further, the areas of the top copper-clad gold-plated partition and the bottom copper-clad gold-plated partition of different acquisition units are the same.
Furthermore, the sampling resistor is fixed in the excavated area through insulating cement, the sampling resistor is a high-precision chip resistor, the resistance value is 5-50 m omega, and the resistance values of the sampling resistors in the acquisition units are the same.
Furthermore, the impedance of the conducting wire used for connecting the sampling resistor with the metalized through hole in the middle of the top copper-clad plating partition and the bottom copper-clad plating partition in each acquisition unit is the same.
A galvanic pile applying a fuel cell internal current distribution online detection device is characterized by comprising a fuel cell galvanic pile, a double-sided partition acquisition board, a signal processing module, an upper computer and an electronic load; the fuel cell stack comprises a plurality of fuel cell units which are connected in series, and each fuel cell unit consists of an anode bipolar plate, a membrane electrode and a cathode bipolar plate which are sequentially superposed; the double-sided subarea acquisition board is a multilayer printed circuit board, is arranged between any two adjacent fuel cell units, namely is positioned between a cathode bipolar plate of the previous fuel cell unit and an anode bipolar plate of the next fuel cell unit, and is used for detecting subarea current density distribution in the fuel cell on line;
the double-sided partition collecting plate consists of a plurality of collecting units which are arranged in an array mode, and each collecting unit comprises a top layer copper-clad gold-plating partition, a top layer PCB insulating material layer, a top layer wiring layer, a middle PCB insulating material layer, a bottom layer wiring layer, a bottom layer PCB insulating material layer and a bottom layer copper-clad gold-plating partition which are sequentially arranged from top to bottom; the top copper-clad and gold-plated subareas of the adjacent acquisition units are electrically isolated from each other, and the bottom copper-clad and gold-plated subareas of the adjacent acquisition units are electrically isolated from each other;
a hollow area is arranged in the middle of the middle PCB insulating material layer, a sampling resistor is buried in the hollow area, and the sampling resistor is respectively connected with the metalized through hole in the middle of the top copper-clad gold-plated partition and the bottom copper-clad gold-plated partition through a lead; the metallized through holes of the double-sided partition collecting plates between different fuel cell units are vertically aligned;
the signal processing module is arranged in an area where two ends of the double-sided partition collecting plate extend out of the fuel cell unit, and is used for processing the potential difference at two ends of the sampling resistor collected through the top routing layer and the bottom routing layer and transmitting the processed signal to the upper computer for real-time display and analysis.
And the electronic load is connected with two ends of the fuel cell stack and is used for assisting the performance test of the fuel cell stack.
Further, the thickness of the top copper-plated gold layer and the thickness of the bottom copper-plated gold layer are both 140-175 microns; the thicknesses of the top PCB insulating material layer, the middle PCB insulating material layer and the bottom PCB insulating material layer are all 0.5-1 mm.
Further, the signal processing module comprises a signal amplifier, a multi-channel analog-to-digital converter and a microcontroller; the potential difference is amplified by the signal amplifier and then transmitted to the microcontroller for processing through the multi-channel analog-to-digital converter.
Further, the areas of the top copper-clad gold-plated partition and the bottom copper-clad gold-plated partition of different acquisition units are the same.
Furthermore, the sampling resistor is fixed in the excavated area through insulating cement, the sampling resistor is a high-precision chip resistor, the resistance value is 5-50 m omega, and the resistance values of the sampling resistors in the acquisition units are the same.
Furthermore, the impedance of the conducting wire used for connecting the sampling resistor with the metalized through hole in the middle of the top copper-clad plating partition and the bottom copper-clad plating partition in each acquisition unit is the same.
The invention has the beneficial effects that:
1. the double-sided partition acquisition board provided by the invention can be arranged between any two adjacent fuel cell units, and can be used for detecting the current density distribution condition of any position in the galvanic pile on line, so that the defect that the traditional mode can only detect the current density distribution of the cell unit close to the end plate is overcome;
2. the sampling resistor is buried in the middle PCB insulating material layer of the double-sided subarea acquisition board, and the wires in the top wiring layer and the bottom wiring layer can not flow through the current in the galvanic pile, so that the lengths of the wires can not be required to be consistent, a complex wiring mode of snake-shaped wiring is avoided, the difference of each subarea impedance caused by the inconsistent lengths of the wires when the voltages at two ends of the sampling resistor are acquired by the traditional mode is improved, and the real current density distribution condition in the battery is influenced;
3. the top layer copper-clad gold-plating subareas of the adjacent acquisition units are electrically isolated from each other, and the bottom layer copper-clad gold-plating subareas of the adjacent acquisition units are electrically isolated from each other, so that the current of each acquisition unit from the top layer copper-clad gold-plating subarea is gathered to the bottom layer copper-clad gold-plating subarea after passing through the metalized via hole, the sampling resistor and the metalized via hole and then is transmitted to the acquisition unit of the next layer, thereby avoiding the problems of large current and high temperature of the compact copper-clad gold-plating subarea of the traditional online subarea monitoring device due to larger reaction area of a galvanic pile, and reducing the risk of plate.
Drawings
Fig. 1 is a layered cross-sectional view of a double-sided sectional acquisition plate in an online detection device for internal current distribution of a fuel cell according to embodiment 1 of the present invention;
fig. 2 is a structural diagram of a signal processing module connected to a single acquisition unit in the on-line detection device for internal current distribution of a fuel cell according to embodiment 1 of the present invention;
fig. 3 is a schematic wiring diagram of a top wiring layer in an on-line detection device for internal current distribution of a fuel cell according to embodiment 1 of the present invention;
fig. 4 is a schematic wiring diagram of a bottom wiring layer in an on-line detection device for internal current distribution of a fuel cell according to embodiment 1 of the present invention;
fig. 5 is a diagram of an installation position of a double-sided partitioned collecting plate in a stack to which an online detection device for current distribution inside a fuel cell is applied according to embodiment 2 of the present invention;
fig. 6 is a schematic view illustrating the stack installation and disassembly of the double-sided partition collecting plates in the stack using the on-line detection device for the current distribution in the fuel cell according to embodiment 2 of the present invention.
The figures include the following reference numerals:
1: two-sided subregion acquisition board
2: signal processing module
3: top layer PCB insulating material layer
4: intermediate PCB insulating material layer
5: bottom layer PCB insulating material layer
6: excavated area
7: sampling resistor
CT: top copper-clad and gold-plated subarea
CB: partition coated with copper and gold on bottom layer
LT: top wiring layer
LB: bottom routing layer
T: metallized via
B1: anode bipolar plate
M: membrane electrode
B2: cathode bipolar plate
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the following embodiments and the accompanying drawings.
The following non-limiting examples are presented to enable those of ordinary skill in the art to more fully understand the present invention and are not intended to limit the invention in any way.
Example 1
The embodiment provides an on-line detection device for current distribution in a fuel cell, which comprises a double-sided subarea acquisition board 1, an upper computer and signal processing modules 2 positioned at two ends of the double-sided subarea acquisition board; the double-sided subarea acquisition board is a multilayer printed circuit board, is arranged between any two adjacent fuel cell units, and is used for detecting subarea current density distribution in the fuel cell on line;
the double-sided subarea acquisition board consists of 12 multiplied by 7 acquisition units which are arranged in an array, the layered cross-sectional view of the double-sided subarea acquisition board is shown in figure 1, and each acquisition unit comprises a top layer copper-clad and gold-plated subarea CT, a top layer PCB insulating material layer 3, a top layer wiring layer LT, a middle PCB insulating material layer 4, a bottom layer wiring layer LB, a bottom layer PCB insulating material layer 5 and a bottom layer copper-clad and gold-plated subarea CB which are sequentially arranged from top to bottom; the top layer copper-clad and gold-plated subareas CT of the adjacent acquisition units are electrically isolated from each other, the bottom layer copper-clad and gold-plated subareas CB of the adjacent acquisition units are electrically isolated from each other, and the areas of the top layer copper-clad and gold-plated subareas CT and the bottom layer copper-clad and gold-plated subareas CB of the different acquisition units are the same; the wiring schematic diagrams of the top routing layer LT and the bottom routing layer LB are respectively shown in FIGS. 3 and 4;
a hollow area 6 is arranged in the middle of the middle PCB insulating material layer 4, a sampling resistor 7 is buried in the hollow area 6, the sampling resistor is fixed in the hollow area through insulating glue, and the sampling resistor 7 is respectively connected with a metallized through hole T in the middle of a top copper-clad gold-plated partition CT and a bottom copper-clad gold-plated partition CB through leads; the impedance of the lead used for connecting the sampling resistor 7 with the metallized through hole T in the middle of the top copper-clad gold-plated subarea CT and the bottom copper-clad gold-plated subarea CB in each acquisition unit is the same; the sampling resistors are high-precision chip resistors, the resistance value is 10m omega, and the resistance values of the sampling resistors in the acquisition units are the same;
the signal processing module 2 is connected to two ends of the sampling resistor 7 through a top routing layer LT and a bottom routing layer LB as shown in fig. 2, performs signal processing on potential difference at two ends of the sampling resistor 7, and transmits the processed signal to an upper computer for real-time display and analysis.
Further, the thicknesses of the top copper-clad gold layer CT and the bottom copper-clad gold layer CB are both 140 mu m; the thicknesses of the top PCB insulating material layer 3, the middle PCB insulating material layer 4 and the bottom PCB insulating material layer 5 are all 0.5 mm.
Further, the signal processing module comprises a signal amplifier, a multi-channel analog-to-digital converter and a microcontroller; the potential difference is amplified by the signal amplifier and then transmitted to the microcontroller for processing through the multi-channel analog-to-digital converter.
Example 2
The embodiment provides a galvanic pile applying a fuel cell internal current distribution online detection device, as shown in fig. 5, which includes a fuel cell galvanic pile, a double-sided partition collecting board 1, a signal processing module 2, an upper computer and an electronic load; the fuel cell stack comprises a plurality of fuel cell units which are connected in series, and each fuel cell unit consists of an anode bipolar plate B1, a membrane electrode M and a cathode bipolar plate B2 which are sequentially overlapped; the double-sided subarea acquisition board 1 is a multilayer printed circuit board, is arranged between any two adjacent fuel cell units, namely is positioned between a cathode bipolar plate B2 of the previous fuel cell unit and an anode bipolar plate B1 of the next fuel cell unit, and is used for detecting subarea current density distribution in the fuel cell on line as shown in figure 6;
the double-sided partition collecting plate consists of 12 multiplied by 7 collecting units which are arranged in an array, and each collecting unit comprises a top layer copper-clad gold-plating partition CT, a top layer PCB insulating material layer 3, a top layer wiring layer LT, a middle PCB insulating material layer 4, a bottom layer wiring layer LB, a bottom layer PCB insulating material layer 5 and a bottom layer copper-clad gold-plating partition CB which are sequentially arranged from top to bottom; the top layer copper-clad and gold-plated subareas CT of the adjacent acquisition units are electrically isolated from each other, the bottom layer copper-clad and gold-plated subareas CB of the adjacent acquisition units are electrically isolated from each other, and the areas of the top layer copper-clad and gold-plated subareas CT and the bottom layer copper-clad and gold-plated subareas CB of the different acquisition units are the same;
a hollow area 6 is arranged in the middle of the middle PCB insulating material layer 4, a sampling resistor 7 is buried in the hollow area 6, the sampling resistor is fixed in the hollow area through insulating glue, and the sampling resistor 7 is respectively connected with a metallized through hole T in the middle of a top copper-clad gold-plated partition CT and a bottom copper-clad gold-plated partition CB through leads; the impedance of the lead used for connecting the sampling resistor 7 with the metallized through hole T in the middle of the top copper-clad gold-plated subarea CT and the bottom copper-clad gold-plated subarea CB in each acquisition unit is the same; the metallized through holes T of the double-sided subarea acquisition plate 1 among different fuel cell units are vertically aligned; the sampling resistors are high-precision chip resistors, the resistance value is 10m omega, and the resistance values of the sampling resistors in the acquisition units are the same;
the signal processing module 2 is arranged in an area where two ends of the double-sided partition collecting plate 1 extend out of the fuel cell unit, processes the electric potential difference at two ends of the sampling resistor 7 collected by the top routing layer LT and the bottom routing layer LB, and transmits the processed signal to an upper computer for real-time display and analysis;
and the electronic load is connected with two ends of the fuel cell stack and is used for assisting the performance test of the fuel cell stack.
Further, the thicknesses of the top copper-clad gold layer CT and the bottom copper-clad gold layer CB are both 140 mu m; the thicknesses of the top PCB insulating material layer 3, the middle PCB insulating material layer 4 and the bottom PCB insulating material layer 5 are all 0.5 mm.
Further, the signal processing module comprises a signal amplifier, a multi-channel analog-to-digital converter and a microcontroller; the potential difference is amplified by the signal amplifier and then transmitted to the microcontroller for processing through the multi-channel analog-to-digital converter.
Claims (10)
1. The on-line detection device for the current distribution in the fuel cell is characterized by comprising a double-sided subarea acquisition board, an upper computer and signal processing modules positioned at two ends of the double-sided subarea acquisition board; the double-sided partition collecting plate is arranged between any two adjacent fuel cell units;
the double-sided partition collecting plate consists of a plurality of collecting units which are arranged in an array mode, wherein each collecting unit comprises a top layer copper-clad gold-plating partition, a top layer PCB insulating material layer, a top layer wiring layer, a middle PCB insulating material layer, a bottom layer wiring layer, a bottom layer PCB insulating material layer and a bottom layer copper-clad gold-plating partition which are sequentially arranged from top to bottom; the top copper-clad and gold-plated subareas of the adjacent acquisition units are electrically isolated from each other, and the bottom copper-clad and gold-plated subareas of the adjacent acquisition units are electrically isolated from each other; the middle of the middle PCB insulating material layer is a hollow area provided with a sampling resistor, and the sampling resistor is respectively connected with a metalized through hole in the middle of the top copper-clad gold-plated subarea and the bottom copper-clad gold-plated subarea;
the signal processing module is used for processing signals of potential differences at two ends of the sampling resistor acquired through the top routing layer and the bottom routing layer, and then transmitting the processed signals to an upper computer for real-time display and analysis.
2. The on-line detection device for the internal current distribution of the fuel cell as claimed in claim 1, wherein the signal processing module comprises a signal amplifier, a multi-channel analog-to-digital converter and a microcontroller; the potential difference is amplified by the signal amplifier and then transmitted to the microcontroller for processing through the multi-channel analog-to-digital converter.
3. The on-line detection device for internal current distribution of fuel cell as claimed in claim 1, wherein the areas of the top copper-clad area and the bottom copper-clad area of different collection units are the same.
4. The on-line detection device for the internal current distribution of the fuel cell as recited in claim 1, wherein the sampling resistor is fixed in the excavated area through an insulating adhesive, the sampling resistor is a high-precision chip resistor, the resistance value is 5-50 m Ω, and the resistance values of the sampling resistors in the respective collection units are the same.
5. The on-line detection device for internal current distribution of fuel cell as claimed in claim 1, wherein the impedance of the conductive wires connecting the sampling resistors with the plated through holes in the middle of the top copper-clad plating partition and the bottom copper-clad plating partition is the same in each of the collection units.
6. The on-line detection device for the internal current distribution of the fuel cell according to claim 1, wherein the thicknesses of the top copper-clad gold layer and the bottom copper-clad gold layer are both 140-175 μm; the thicknesses of the top PCB insulating material layer, the middle PCB insulating material layer and the bottom PCB insulating material layer are all 0.5-1 mm.
7. A galvanic pile applying a fuel cell internal current distribution online detection device is characterized by comprising a fuel cell galvanic pile, a double-sided partition acquisition board, a signal processing module, an upper computer and an electronic load; the fuel cell stack comprises a plurality of fuel cell units connected in series; the double-sided partition collecting plate is arranged between any two adjacent fuel cell units;
the double-sided partition collecting plate consists of a plurality of collecting units which are arranged in an array mode, wherein each collecting unit comprises a top layer copper-clad gold-plating partition, a top layer PCB insulating material layer, a top layer wiring layer, a middle PCB insulating material layer, a bottom layer wiring layer, a bottom layer PCB insulating material layer and a bottom layer copper-clad gold-plating partition which are sequentially arranged from top to bottom; the top copper-clad and gold-plated subareas of the adjacent acquisition units are electrically isolated from each other, and the bottom copper-clad and gold-plated subareas of the adjacent acquisition units are electrically isolated from each other; the middle of the middle PCB insulating material layer is a hollow area provided with a sampling resistor, and the sampling resistor is respectively connected with a metalized through hole in the middle of the top copper-clad plating gold-plating subarea and the bottom copper-clad plating gold-plating subarea; the metallized through holes of the double-sided partition collecting plates between different fuel cell units are vertically aligned;
the signal processing module is arranged in an area where two ends of the double-sided partition collecting plate extend out of the fuel cell unit, and is used for processing the potential difference at two ends of the sampling resistor collected through the top routing layer and the bottom routing layer and transmitting the processed signal to the upper computer for real-time display and analysis.
And the electronic load is connected with two ends of the fuel cell stack and is used for assisting the performance test of the fuel cell stack.
8. The electric pile for applying the fuel cell internal current distribution online detection device according to claim 6, wherein the signal processing module comprises a signal amplifier, a multi-channel analog-to-digital converter and a microcontroller; the potential difference is amplified by the signal amplifier and then transmitted to the microcontroller for processing through the multi-channel analog-to-digital converter.
9. The stack applying the on-line detection device for current distribution inside a fuel cell according to claim 6, wherein the areas of the top copper-clad gold-plated sub-area and the bottom copper-clad gold-plated sub-area of different collection units are the same; the impedance of the lead used for connecting the sampling resistor with the metalized through hole in the middle of the top copper-clad plating gold-plating subarea and the bottom copper-clad plating gold-plating subarea in each acquisition unit is the same.
10. The galvanic pile applying the fuel cell internal current distribution online detection device according to claim 6, wherein the sampling resistor is fixed in the excavated area through an insulating glue, the sampling resistor is a high-precision chip resistor, the resistance value is 5-50 m Ω, and the resistance values of the sampling resistors in the acquisition units are the same.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011078944.2A CN112234233A (en) | 2020-10-10 | 2020-10-10 | Fuel cell internal current distribution on-line detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011078944.2A CN112234233A (en) | 2020-10-10 | 2020-10-10 | Fuel cell internal current distribution on-line detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112234233A true CN112234233A (en) | 2021-01-15 |
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Cited By (5)
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| CN113075444A (en) * | 2021-03-26 | 2021-07-06 | 电子科技大学 | Online detection device for internal current wiring type distribution of fuel cell |
| CN113078336A (en) * | 2021-03-26 | 2021-07-06 | 电子科技大学 | Fuel cell internal temperature distributed measurement and control device and electric pile thereof |
| CN113363539A (en) * | 2021-05-28 | 2021-09-07 | 电子科技大学 | High-resolution partition detection system for internal current of fuel cell stack |
| CN115084614A (en) * | 2022-08-19 | 2022-09-20 | 中国科学院宁波材料技术与工程研究所 | Solid oxide fuel cell stack |
| CN116879774A (en) * | 2023-09-08 | 2023-10-13 | 上海氢晨新能源科技有限公司 | Plane current distribution measuring device and method for fuel cell |
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| CN113075444A (en) * | 2021-03-26 | 2021-07-06 | 电子科技大学 | Online detection device for internal current wiring type distribution of fuel cell |
| CN113078336A (en) * | 2021-03-26 | 2021-07-06 | 电子科技大学 | Fuel cell internal temperature distributed measurement and control device and electric pile thereof |
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| CN116879774B (en) * | 2023-09-08 | 2023-11-24 | 上海氢晨新能源科技有限公司 | Plane current distribution measuring device and method for fuel cell |
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