CN216698446U - Fuel cell - Google Patents
Fuel cell Download PDFInfo
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- CN216698446U CN216698446U CN202122616493.XU CN202122616493U CN216698446U CN 216698446 U CN216698446 U CN 216698446U CN 202122616493 U CN202122616493 U CN 202122616493U CN 216698446 U CN216698446 U CN 216698446U
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Abstract
The utility model discloses a fuel cell, comprising: the device comprises an electric pile formed by stacking a plurality of bipolar plates, current collecting plates arranged at two ends of the electric pile, an inspection assembly arranged on the stacking surface of the electric pile and an end plate used for fixing the current collecting plates and the electric pile; every bipolar plate's side is stretched out and is had a slice to patrol and examine the piece, and each is patrolled and examined the piece and be located same one side of stacking the face, and the piece of patrolling and examining of adjacent bipolar plate is located the both ends of stacking the face respectively, patrol and examine the subassembly and locate two of stacking the face both ends including corresponding, every is patrolled and examined the subassembly and includes the PCB board, offers on the PCB board to be used for supplying to patrol and examine the notch that the piece stretches out, and the PCB board is equipped with near every notch and is used for and patrols and examines the copper foil that piece electrically conductive is connected, still be equipped with on the PCB board as the plug-in of drawing forth the end to and with each copper foil and plug-in electrically conductive printed circuit of being connected. According to the utility model, the integration level of the fuel cell is improved, the welding difficulty is reduced and the welding strength is improved in a mode that the inspection sheet is welded to the PCB.
Description
Technical Field
The utility model relates to the technical field of fuel cells, in particular to a voltage inspection assembly for a fuel cell.
Background
The fuel cell stack is formed by alternately stacking a plurality of Membrane Electrode Assemblies (MEA) and bipolar plates, when the stack works, hydrogen and oxygen are respectively distributed to the bipolar plates through the main gas channels of the stack, are uniformly distributed to the membrane electrode through the diversion of the bipolar plates, and are contacted with a catalyst through the membrane electrode support body to carry out electrochemical reaction.
The voltage values and the change conditions of each MEA are monitored in real time in practical use, so that the voltage inspection of each MEA in the stack becomes important.
The bipolar plate at the present stage is usually made of graphite, the graphite bipolar plate and the MEA form a traditional graphite electric pile, the corresponding inspection sheets are arranged on one side of the graphite electric pile, and the sampling current is guided in a mode of welding thin wires on the inspection sheets. Therefore, the traditional graphite galvanic pile has the following defects:
firstly, because the welding difficulty is higher after the traditional graphite galvanic pile is grouped, the mode of welding wires one by one on each bipolar plate before grouping is generally adopted, the consumed time is longer, the section of a lead is small, the welding strength is weaker, the lead is easy to fall off in the use of the subsequent galvanic pile to cause sampling failure, the more the number of the leads is, the more the number of the galvanic pile is, the more the lead is, the aesthetic effect is influenced, and the difficulty in structural design of the galvanic pile is also improved due to the fixation of the lead;
secondly, it is less to patrol and examine between the piece, receives external factors influence to have the risk that switches on each other, for example after the pile encapsulation, the inside comdenstion water that produces after the pile operation of packaging shell is gathered and is leaded to two patrolling and examining the piece to switch on each other between the adjacent piece of patrolling and examining, and the degree of difficulty of doing insulating treatment one by one is also bigger under the little condition of interval.
The specification with the publication number of CN111289901B discloses a fuel cell stack voltage inspection method, which comprises the following steps: under the condition of not influencing the normal work of the galvanic pile, a clamping groove is arranged at the edge position of the bipolar plate; inserting the metal sheet matched with the clamping groove into the position right above the special-shaped clamping groove; a limiting insulating pad is arranged in the direction vertical to the surface of the metal sheet and used for fixing the metal sheet and insulating between adjacent bipolar plates; inserting a quick plug into the metal sheet, wherein the tail end of the quick plug is provided with a high-temperature-resistant lead; and connecting the high-temperature wire with a lower computer PCB, and displaying the voltage real-time data collected by the PCB through an upper computer. But the utility model does not reduce the risk of mutual conduction between the dies due to the short distance.
The specification of publication No. CN212031676U discloses an inspection module for fuel cell voltage and a fuel cell including the same, the inspection module for fuel cell voltage including: a plurality of eyelets having legs; the PCB board is provided with a plurality of fixing holes, and the support leg of each metal ring is inserted into the fixing holes. The utility model adopts the mode that the metal ring is contacted with the polar plate of the fuel cell to acquire signals, and the metal ring is easy to deform and shift to cause sampling failure in the subsequent use of the galvanic pile.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a fuel cell with high integration, which reduces the welding difficulty and improves the welding strength by welding a routing inspection sheet to a PCB.
A fuel cell, comprising: the device comprises an electric pile formed by stacking a plurality of bipolar plates, current collecting plates arranged at two ends of the electric pile, an inspection assembly arranged on the stacking surface of the electric pile and an end plate used for fixing the current collecting plates and the electric pile;
every bipolar plate's side is stretched out and is had a slice to patrol and examine the piece, and each is patrolled and examined the piece and be located same one side of stacking the face, and the piece of patrolling and examining of adjacent bipolar plate is located the both ends of stacking the face respectively, patrol and examine the subassembly and locate two of stacking the face both ends including corresponding, every is patrolled and examined the subassembly and includes the PCB board, offers on the PCB board to be used for supplying to patrol and examine the notch that the piece stretches out, and the PCB board is equipped with near every notch and is used for and patrols and examines the copper foil that piece electrically conductive is connected, still be equipped with on the PCB board as the plug-in of drawing forth the end to and with each copper foil and plug-in electrically conductive printed circuit of being connected.
The utility model discloses a multi-section MEA voltage real-time monitoring device, including polylith bipolar plate, the polylith bipolar plate piles up to become the pile, the pile can adopt the graphite pile that the graphite bipolar plate piled up, patrols and examines the subassembly and locate the both ends of piling up the face respectively, and the piece of patrolling and examining of one end is welded on same PCB board through the copper foil respectively, the copper foil passes through printed circuit connection plug-in components, and external detection device passes through the voltage numerical value and the situation of change of connecting plug-in components real-time supervision on every section of MEA.
PCB plate thickness is 1 ~ 3mm, the PCB board is not more than the width of the face of piling up of galvanic pile in galvanic pile stacking direction ascending width, patrols and examines the subassembly and locates between the two-end plate, optimizes fuel cell's structure space, has improved pleasing to the eye degree.
And the inspection piece is bent to form a folded edge after extending out of the notch, and the folded edge is pressed on the copper foil and is welded and fixed with the copper foil. Will the hem of patrolling piece passes through the copper foil and welds in the PCB board for it is great to patrol piece and copper foil welding area, has improved welding strength.
The copper foil is nickel-plated copper foil, the folded edge of the inspection piece is fixed on the PCB through soldering and the nickel-plated copper foil, and the welded area is covered by insulating glue. Adopt the soldering and wrap up the insulating cement in the welded region, not only improved welding strength, still reduced the risk of intercommunication effectively.
Preferably, the notch is a long-strip-shaped notch, the length of the nickel-plated copper foil is 1-2 mm larger than that of the notch, the thickness of the nickel-plated copper foil is 0.1-0.2 mm, and the thickness of nickel plating is 7-10 mu m; the length dimension of nickel-plated copper foil is greater than the length dimension of notch, conveniently with patrol and examine the piece tin soldering, the nickel plating of certain thickness still has corrosion-resistant effect simultaneously.
The plug-in components adopt standard specification elements, the stitch interval of the plug-in components is more than 1mm, and the detection of the conductivity between each stitch and the corresponding copper foil is facilitated.
The EVA foam is arranged between the PCB and the bipolar plate, the thickness of the EVA foam is 3-6mm, and the EVA foam with certain thickness is arranged between the PCB and the bipolar plate, so that the EVA foam not only plays a role of insulation and isolation, but also provides support and fixation for the PCB.
Preferably, EVA bubble cotton and PCB board and galvanic pile junction all are equipped with two-sided 3M and glue, and the PCB board can be fixed in galvanic pile department through the EVA bubble cotton that two-sided 3M glued, and is convenient reliable.
Compared with the prior art, the utility model has the advantages that:
1. the PCB printed circuit is adopted to replace the traditional lead-out wire, so that the integration level of the fuel cell is improved, and the appearance attractiveness is improved;
2. the traditional mode of welding the lead to the inspection sheet is replaced by the mode of welding the inspection sheet to the PCB, so that the welding difficulty is reduced, and the welding strength is improved;
3. the inspection sheets of the adjacent bipolar plates are positioned at the left side and the right side, so that the intercommunication risk of the traditional galvanic pile is greatly avoided.
Drawings
Fig. 1 is a schematic structural view of a fuel cell according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a first bipolar plate according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a second bipolar plate according to an embodiment of the present invention.
Fig. 4 is a schematic structural view of the inspection module shown in fig. 1.
Fig. 5 is a partially enlarged schematic view of a portion a shown in fig. 4.
Detailed Description
As shown in fig. 1 to 5, a fuel cell includes: the electric pile 1, the current collecting plate 2, the inspection assembly 3 and the end plate 4.
The current collecting plates 2 are arranged at two ends of the galvanic pile 1, and the stacking surface of the galvanic pile 1 is fixedly provided with the routing inspection assembly 3, and the end plates 4 are positioned at the outer sides of the current collecting plates 2 and used for fixing the current collecting plates 2 and the galvanic pile 1.
The electric pile 1 that the polylith bipolar plate piles up and forms, the side of every bipolar plate stretches out a slice and patrols and examines the piece, and each patrols and examines the piece and is located the same one side of stacking the face, and the piece of patrolling and examining of adjacent bipolar plate lies in the both ends of stacking the face respectively, and the electric pile can adopt the graphite electric pile that graphite bipolar plate piles up.
As shown in fig. 2 and 3, the adjacent bipolar plates are a first bipolar plate 11 and a second bipolar plate 13, the stacking surfaces of the first bipolar plate 11 and the second bipolar plate 13 are respectively provided with a first inspection sheet 12 and a second inspection sheet 14, which are symmetrical in position, and a certain distance is provided between the first inspection sheet 12 and the second inspection sheet 14, so that the first inspection sheet 12 and the second inspection sheet 14 can be respectively connected with one inspection assembly 3. The positions of the first inspection piece 12 and the second inspection piece 14 can be adjusted according to the detection requirements.
The inspection component 3 comprises a PCB 32 provided with a notch 31, and one side of the PCB 32 is provided with a nickel-plated copper foil 33. The first inspection piece 12 and the second inspection piece 14 pass through the notch 31 and are bent and pressed against the nickel-plated copper foil 33.
The direction of the folded edges of the first inspection piece 12 and the second inspection piece 14 is opposite, and the folded edges of the first inspection piece 12 and the second inspection piece 14 need to be pressed on the nickel-plated copper foil 33, so that the problem of insufficient soldering during soldering fixation is prevented.
The folded edges of the first inspection piece 12 and the second inspection piece 14 are fixed on the PCB 32 by soldering through a nickel-plated copper foil 33, and the welded area is covered by an insulating glue. Adopt the soldering and wrap up the insulating cement in the welded region, not only improved welding strength, still reduced the risk of intercommunication effectively.
The thickness of the PCB 32 is 2mm, and the width of the PCB 32 in the stacking direction of the galvanic pile 1 is not more than the width of the stacking surface of the galvanic pile 1; the inspection assembly 3 is positioned between the end plates 4, the structural space of the fuel cell is optimized, and the attractiveness is improved.
The notch 31 is a long-strip-shaped notch, the length of the notch 31 is greater than that of the second inspection piece 14, the length of the nickel-plated copper foil 33 is greater than that of the notch by 1-2 mm, the thickness of the nickel-plated copper foil 33 is 0.1-0.2 mm, and the thickness of nickel plating is 7-10 mu m; the length dimension of the nickel-plated copper foil 33 is larger than that of the notch 31, so that the nickel-plated copper foil can be conveniently soldered with the first inspection piece 12 and the second inspection piece 14, and the nickel plating with a certain thickness also has the corrosion resistance.
The number of the notches 31 is the same as the number of the corresponding first inspection piece 12 or second inspection piece 14, one end of the printed circuit 34 is pressed below the nickel-plated copper foil 33, and the other end of the printed circuit 34 is connected with the plug 35. The surface of the PCB 32 on which the insert 35 is provided is a functional area surface, and the surface of the functional area surface is coated with green paint.
The plug-in unit 35 is a molex straight needle plug-in unit, the pin pitch of the molex straight needle plug-in unit is 1.25mm, and before detection, good conductivity between each pin and the corresponding nickel-plated copper foil 33 needs to be ensured.
EVA bubble cotton 36 all is equipped with two-sided 3M glues with PCB board 32 and 1 junction of galvanic pile, and PCB board 32 can be fixed in 1 department of galvanic pile through the EVA bubble cotton 36 that two-sided 3M glues, convenient reliable.
The two inspection assemblies 3 are respectively fixed at a first inspection piece 12 of the first bipolar plate 11 and a second inspection piece 14 of the second bipolar plate 13, the first bipolar plate 11 and the second bipolar plate 13 are stacked in a crossed manner to form an electric pile 1, the first inspection piece 12 and the second inspection piece 14 are respectively soldered on a PCB 32 through bending and a nickel-plated copper foil 33, the nickel-plated copper foil 33 is connected with a plug-in unit 35 through a printed circuit 34, and an external detection device monitors the voltage value and the change condition of each MEA in real time through the connection plug-in unit 35.
Claims (8)
1. A fuel cell, comprising: the device comprises an electric pile formed by stacking a plurality of bipolar plates, current collecting plates arranged at two ends of the electric pile, an inspection assembly arranged on the stacking surface of the electric pile and an end plate used for fixing the current collecting plates and the electric pile;
its characterized in that, the side of every bipolar plate is stretched out and is had a slice to patrol and examine the piece, and each is patrolled and examined the piece and be located same one side of stacking the face, and the piece of patrolling and examining of adjacent bipolar plate is located the both ends of stacking the face respectively, patrol and examine the subassembly and locate two of stacking the face both ends including corresponding, every is patrolled and examined the subassembly and includes the PCB board, offers on the PCB board to be used for supplying to patrol and examine the notch that the piece stretches out, the PCB board near every notch be equipped with be used for with patrol and examine the copper foil of piece conductive connection, still be equipped with on the PCB board as the plug-in of drawing forth the end to and with each copper foil and plug-in conductive connection's printed circuit.
2. The fuel cell according to claim 1, wherein the PCB has a thickness of 1 to 3mm, and a width of the PCB in a stacking direction of the stack is not greater than a width of a stacking surface of the stack.
3. The fuel cell according to claim 1, wherein the routing sheet is bent to form a folded edge after extending out of the notch, and the folded edge is pressed against the copper foil and is welded and fixed with the copper foil.
4. The fuel cell according to claim 3, wherein the copper foil is a nickel-plated copper foil, and the folded edge of the routing sheet is fixed to the PCB by soldering with the nickel-plated copper foil, and the soldered area is covered with an insulating paste.
5. The fuel cell according to claim 4, wherein the notch is an elongated notch, the length dimension of the nickel-plated copper foil is 1 to 2mm greater than the length of the notch, the thickness of the nickel-plated copper foil is 0.1 to 0.2mm, and the thickness of the nickel plating is 7 to 10 μm.
6. The fuel cell of claim 1, wherein the insert is a standard format element and the pin pitch of the insert is 1mm or more.
7. The fuel cell of claim 1, wherein an EVA foam is disposed between the PCB and the bipolar plate, and the EVA foam has a thickness of 3-6 mm.
8. The fuel cell of claim 7, wherein the joint of the EVA foam, the PCB and the stack is provided with double-sided 3M glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122616493.XU CN216698446U (en) | 2021-10-28 | 2021-10-28 | Fuel cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122616493.XU CN216698446U (en) | 2021-10-28 | 2021-10-28 | Fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216698446U true CN216698446U (en) | 2022-06-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122616493.XU Active CN216698446U (en) | 2021-10-28 | 2021-10-28 | Fuel cell |
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| Country | Link |
|---|---|
| CN (1) | CN216698446U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115064724A (en) * | 2022-08-18 | 2022-09-16 | 深圳市万联新能科技有限公司 | Electrode plate group, fuel cell stack, fuel cell and automobile |
| CN115561489A (en) * | 2022-09-29 | 2023-01-03 | 中汽创智科技有限公司 | Electric pile inspection device |
-
2021
- 2021-10-28 CN CN202122616493.XU patent/CN216698446U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115064724A (en) * | 2022-08-18 | 2022-09-16 | 深圳市万联新能科技有限公司 | Electrode plate group, fuel cell stack, fuel cell and automobile |
| CN115064724B (en) * | 2022-08-18 | 2022-12-06 | 深圳市万联新能科技有限公司 | Detection system and car |
| CN115561489A (en) * | 2022-09-29 | 2023-01-03 | 中汽创智科技有限公司 | Electric pile inspection device |
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