CN116960387A - Fuel cell single cell polar plate structure - Google Patents
Fuel cell single cell polar plate structure Download PDFInfo
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- CN116960387A CN116960387A CN202310933080.5A CN202310933080A CN116960387A CN 116960387 A CN116960387 A CN 116960387A CN 202310933080 A CN202310933080 A CN 202310933080A CN 116960387 A CN116960387 A CN 116960387A
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- 239000000446 fuel Substances 0.000 title claims abstract description 39
- 238000007789 sealing Methods 0.000 claims abstract description 129
- 239000003292 glue Substances 0.000 claims abstract description 112
- 238000002347 injection Methods 0.000 claims abstract description 68
- 239000007924 injection Substances 0.000 claims abstract description 68
- 239000000498 cooling water Substances 0.000 claims abstract description 40
- 238000004891 communication Methods 0.000 claims abstract description 19
- 230000000903 blocking effect Effects 0.000 claims description 12
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- 238000009826 distribution Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 23
- 230000009286 beneficial effect Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 118
- 239000000565 sealant Substances 0.000 description 32
- 239000012528 membrane Substances 0.000 description 21
- 238000000034 method Methods 0.000 description 15
- 238000006243 chemical reaction Methods 0.000 description 9
- 238000005728 strengthening Methods 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000003466 welding Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 4
- 238000003487 electrochemical reaction Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010073 coating (rubber) Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000000576 coating method Methods 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
- 239000006063 cullet Substances 0.000 description 1
- 238000003411 electrode reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- 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
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/0276—Sealing means characterised by their form
-
- 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
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0258—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant
- H01M8/026—Collectors; Separators, e.g. bipolar separators; Interconnectors characterised by the configuration of channels, e.g. by the flow field of the reactant or coolant characterised by grooves, e.g. their pitch or depth
-
- 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
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/0286—Processes for forming seals
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The application relates to a single cell polar plate structure of a fuel cell, which comprises the following components: polar plate body, medium passageway, first gas passage boss, injecting glue seal groove. The sealing glue is injected into the glue injection sealing groove, the sealing glue avoids the first communication channel to form a sealing structure through the first gas channel boss, the influence on the medium smoothness between the first gas channel and the flow channel area is avoided, and the sealing glue can form an integral sealing structure on the polar plate through the arrangement of the first sealing groove and the second sealing groove, meanwhile, the second gas channel, the cooling water channel and the first gas channel can be separated, so that the sealing performance is ensured, and meanwhile, the medium in the medium channel is prevented from leaking mutually; the polar plate structure provided by the application is used for adaptively producing single cells, so that the sealing performance and the production efficiency of the single cells can be effectively improved, the production cost of the single cells can be reduced, and the beneficial effects of mass production requirements of the single cells can be met.
Description
Technical Field
The application relates to the technical field of vehicle fuel cells, in particular to a single cell polar plate structure of a fuel cell.
Background
A fuel cell is a power generation device that directly converts chemical energy in fuel and oxidant into electric energy through an electrochemical reaction. The hydrogen fuel cell comprises anode plates, cathode plates, membrane electrodes and other parts, and the sealing element provides specific areas for the first gas, the second gas and the coolant to perform electrochemical reaction to realize the power generation function. Automotive fuel cells typically require hundreds of cells in series to provide adequate voltage. The conventional fuel cell stack is formed by alternately stacking and press-fitting a bipolar plate assembly and a membrane electrode assembly.
Currently, bipolar plate assemblies are assembled from cathode and anode plates by laser welding. However, in the welding process, defects such as welding through, ablation, welding slag splashing, cold welding, air holes and the like easily occur on the cathode plate and the anode plate, so that products are scrapped, and meanwhile, unavoidable damage is caused to the coating layers of the cathode plate and the anode plate, so that the quality of the products is affected. And the welded bipolar plate may have defects such as warpage, poor lamination or dislocation, which affect the sealing performance. The traditional sealing mode mainly adopts a bipolar plate and a membrane electrode extrusion sealing element to form contact sealing, and comprises the following two modes: the bipolar plate bonding forming sealing ring and the bipolar plate dispensing sealing are difficult to position in the bonding process because the formed sealing ring is soft in material, the sealing ring is thin in thickness, sealing failure can be caused by different gluing thickness and tightness degree, and the bipolar plate bonding forming sealing ring process has low production efficiency. The bipolar plate dispensing seal mainly joints sealing material on the bipolar plate through a dispensing machine, in order to ensure thickness uniformity of a dispensing sealing ring, process parameters of a dispensing point, a receiving point and a joint of the sealing ring are required to be subjected to full experimental verification, and a custom tooling fixture is required to position the bipolar plate.
Aiming at the technical problems, the prior solution is as follows: in the prior art, an independent single cell assembly is formed by bonding an anode plate, a cathode plate and a membrane electrode, so that the problems of welding defects and coating damage of a bipolar plate caused by laser welding are avoided, the pollution of cathode and anode flow fields is avoided, and the assembly efficiency of a galvanic pile is improved. But this scheme melts bonding portion and need heat the rubber coating and then cool down solidification again, and between anode plate and the membrane electrode, between negative plate and the membrane electrode, negative plate water cavity sealing washer all need carry out the heating back cooling, and single cell structure needs to pass through the three heating cooling circulation, because heating temperature is higher to the multiple heating causes the damage to the membrane electrode reaction zone easily, and causes single cell assembly warpage problem. In addition, the bonding adopted by the single cell technical scheme in the first prior art has the problems of complex working procedures, long curing time and low production efficiency. In the second prior art, the single cell structure of the sealing ring is formed by integral glue injection, and the scheme solves the problem of complicated process procedures of glue injection or bonding, so that the production efficiency of the single cell is improved. However, the scheme adopts an outer layer sealing and public pipeline island sealing scheme, so that a purging blind area is easily formed in a cathode cavity and an anode cavity, and water generated by the reaction is not easy to discharge; when the ambient temperature is lower than 0 ℃, the sealing failure is caused by the blockage of a flow passage or the volume expansion after the freezing, and secondly, the sealing area of the scheme is relatively large, so that the volume specific power density of the fuel cell is relatively low; in addition, in the scheme of the second prior art, the water cavity seal adopts contact compression seal, and as the contact sealing surfaces at two sides of the water cavity seal are elastic elements, the seal is easy to fail due to assembly or machining errors.
Therefore, it is necessary to provide a fuel cell electrode plate structure, which is matched with an integrated glue injection sealing process to form a single cell structure, so as to achieve smooth and sealing of the working medium of the integrated seal glue injection fuel cell single cell, thereby solving the problems.
Disclosure of Invention
The application provides a single cell polar plate structure of a fuel cell, which aims to solve the problems that in the prior art, the sealing performance of a sealing element of the single cell structure of the fuel cell is low, the production and assembly efficiency is low, the production cost is high and the requirement of mass production cannot be met.
In order to achieve the above purpose, the technical scheme adopted by the application is as follows:
a fuel cell plate structure comprising:
the polar plate body comprises a flow passage area arranged in the middle and a frame arranged around the flow passage area;
the medium channel comprises a first gas channel, a second gas channel and a cooling water channel which are arranged on the frame;
the first gas channel boss is arranged on the frame around the first gas channel, a communication channel extending towards the flow channel area is arranged on the first gas channel boss, and the communication channel is used for communicating the first gas channel with the flow channel area;
the injecting glue seal groove is arranged on the frame, the injecting glue seal groove comprises a main seal groove arranged along the circumferential direction, a first seal groove and a second seal groove, wherein the first seal groove and the second seal groove are communicated with the main seal groove, the first seal groove is arranged around the second gas channel, and the second seal groove is arranged around the cooling water channel.
According to the technical means, the first seal groove and the second seal groove are formed in the polar plate body and communicated with the main seal groove, the first seal groove is arranged around the second gas channel, the second seal is arranged around the cooling water channel, the first gas channel is provided with the first gas channel boss, and the structural design of the communication channel is arranged between the first gas channel boss and the flow channel region, so that when sealant is injected into the glue injection seal groove, the polar plate body can form a peripheral seal at the second gas channel and the cooling water channel, the first gas channel is formed into a seal structure through the first gas channel boss, the first gas channel is prevented from forming a seal structure at the first gas channel, so that the sealing glue is prevented from forming a seal structure at the communication channel to block the air inlet at the first gas channel, and the second gas channel is prevented from forming a peripheral seal in the first seal groove and the second seal groove through the second gas channel, the medium in the medium channel is effectively prevented from leaking mutually, the sealing performance is ensured, and the first seal groove, the second seal groove is communicated with the main seal groove, so that the seal structure forms an integral seal structure, and the sealing structure is prevented from forming an island seal at the channel, thus the sealing structure is prevented from forming a sealing island, the sealing is easy to be generated, the sealing structure is prevented from forming the sealing structure, and the sealing structure is not to be completely due to the water is prevented from forming the problem, and the problem that is caused due to the failure due to the water is caused when the low temperature is caused by the water, and the water is low-temperature and poor, and has the effect and is caused by the blowing and the problem; and the sealing structure is formed by injecting the sealant once, so that the sealing performance is ensured, the production efficiency is effectively improved, and the production cost is reduced.
Optionally, the communication channel includes a duct, a converging groove and a flow passage expansion area, the duct is communicated with the first gas channel, the flow passage expansion area is communicated with the flow passage area, the converging groove is arranged between the duct and the flow passage expansion area, and the converging groove is used for communicating the duct with the flow passage expansion area.
According to the technical means, the first gas enters the converging groove through the duct, flows through the converging groove and flows into the flow passage area through the flow passage expansion area. The diffusion area of the first gas can be increased through the design of the duct and the flow passage expansion area, so that the first gas can be more uniformly distributed in the flow passage area of the polar plate body, the reaction contact area of the first gas entering the reaction area is increased, and the utilization rate of the first gas in electrochemical reaction is improved; through setting up the sink between duct and runner extension, can effectively improve the degree of consistency that the gas distributes in the entering runner area of first gas, make the first gas realize smooth gas distribution between duct and runner extension to improve fuel cell's reaction efficiency and stability.
Optionally, a plurality of injecting glue connecting holes are uniformly distributed in the main sealing groove along the circumferential direction, the injecting glue connecting holes penetrate through the polar plate body along the thickness direction of the polar plate body, and the injecting glue connecting holes are symmetrical about the center of the polar plate body.
According to the technical means, the sealant is injected into the sealant injection connecting hole from the outer side of the polar plate body, and the sealant forms an integrated sealing structure in the sealant injection sealing groove.
Optionally, between the main seal groove and the converging groove, between the secondary seal groove and the converging groove, a glue blocking structure protruding towards the opening direction of the glue injection seal groove is arranged.
According to the technical means, the glue blocking structure is designed, so that the sealing glue can be effectively blocked from overflowing into the converging groove in the glue injection sealing groove, the communicating channel is prevented from being blocked, the sealing performance is ensured, and meanwhile, the smoothness of a working medium in the communicating channel is ensured.
Optionally, a polar plate reinforcing structure protruding towards the opening direction of the glue injection sealing groove is arranged between adjacent glue injection connecting holes on the long edge of the polar plate body and located in the sealing groove.
According to the technical means, the pole plate reinforcing structure can provide supporting force for the membrane electrode, so that warping damage of the membrane electrode caused by overlarge glue injection pressure in the glue injection process of the single cell is avoided; meanwhile, the reinforcing ribs are formed on the pole plate body by the pole plate reinforcing structure, so that the structural strength of the pole plate body is improved, and the risk of buckling deformation of the pole plate body in the transportation process is avoided.
Optionally, the polar plate body has a plurality of injecting glue exhaust holes along circumference distribution, and is a plurality of injecting glue exhaust holes are located the main seal groove is kept away from one side of runner district, injecting glue exhaust hole is followed the thickness direction of polar plate body runs through the setting.
According to the technical means, in the glue injection process, redundant gas in the glue injection sealing groove is discharged through the glue injection vent hole so as to balance the internal gas pressure, ensure the glue inlet pressure balance, avoid the problem of air pocket of a sealing structure formed in the glue injection sealing groove, and further improve the sealing performance of the single cell.
Optionally, a glue injection overflow groove is arranged between the main seal groove and the runner area, and the glue injection overflow groove extends along the long side direction of the polar plate body.
According to the technical means, the hidden danger of pollution to the runner area when glue overflows during glue injection in the glue injection sealing groove can be effectively avoided through the glue injection overflow groove arranged between the runner area and the main sealing groove.
Optionally, the second gas channel is equipped with along circumference towards the bellied second gas channel boss of injecting glue seal groove opening direction, the cooling water channel is equipped with along circumference towards the bellied cooling water channel boss of injecting glue seal groove opening direction, first time seal groove is around second gas channel boss sets up, the second time seal groove is around cooling water channel boss sets up.
According to the technical means, the second gas channel boss and the cooling water channel boss avoid the sealing glue from affecting the smooth performance of medium circulation in the second gas channel or the cooling water channel.
Optionally, the electrode plate body is an anode plate, the first gas channel is used for providing a circulation channel for a first gas, and the second gas channel is used for providing a circulation channel for a second gas.
Optionally, the electrode plate body is a cathode plate, the first gas channel is used for providing a circulation channel for the second gas, and the second gas channel is used for providing a circulation channel for the first gas.
The application has the beneficial effects that: according to the electrode plate structure, the single cell comprises two electrode plate bodies and a membrane electrode which are stacked, and the sealant is injected into the sealant connecting hole to form a sealing structure in the sealant sealing groove, so that the first gas channel, the second gas channel and the cooling water channel of the electrode plate bodies are sealed while the single cell structure is connected in a sealing mode, and the problem of mutual internal leakage among medium channels is avoided. Through the first gas channel boss that sets up on the polar plate body for the sealant can avoid forming sealedly between first gas channel department and runner district in the injecting glue seal groove, can separate disconnection with first gas channel and cooling water passageway, second gas channel simultaneously, thereby avoid second gas or cooling water to get into the runner district. The fuel cell pole plate structure provided by the application is used for adaptively producing the integrated glue injection sealed fuel cell, so that the sealing performance and the production efficiency of the cell are effectively improved, the assembly process of the cell is simplified, and the production cost of the fuel cell is reduced, thereby having the beneficial effect of meeting the mass production requirement of the cell; and the sealing structure integrally formed in the glue injection sealing groove effectively reduces the ratio of the area of the sealing structure to the area of the polar plate, thereby increasing the area ratio of the effective reaction area of the single cell structure and further improving the volumetric specific power density of the fuel cell.
Drawings
FIG. 1 is a schematic view of a plate structure according to an embodiment of the present application;
fig. 2 is a schematic view of a portion of the cross-sectional structure A-A of fig. 1 at a sink.
Description of the part reference numerals
The electrode plate comprises an electrode plate body 1, a flow passage area 101, a frame 102, a medium passage 2, a first gas passage 201, a first gas inlet passage 201a, a first gas outlet passage 201b, a second gas passage 202, a second gas inlet passage 202a, a second gas outlet passage 202b, a second gas passage boss 202c, a cooling water passage 203, a cooling water passage boss 203a, a cooling water inlet passage 203b, a cooling water outlet passage 203c, a first gas passage boss 3, a communication passage 301, a cullet 301a, a converging groove 301b, a flow passage expansion area 301c, a glue injection sealing groove 4, a main sealing groove 401, a glue injection connecting hole 401a, a first sealing groove 402, a second sealing groove 403, a glue blocking structure 5, an electrode plate reinforcing structure 6, a glue injection vent hole 7 and a glue injection overflow groove 8.
Detailed Description
Other advantages and effects of the present application will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present application with reference to specific examples. The application may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present application.
Please refer to fig. 1-2. It should be noted that, the illustrations provided in the present embodiment merely illustrate the basic concept of the present application by way of illustration, and only the components related to the present application are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complex. The structures, proportions, sizes, etc. shown in the drawings attached hereto are for illustration purposes only and are not intended to limit the scope of the application, which is defined by the claims, but rather by the claims. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the application, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the application may be practiced.
Before describing embodiments of the present application in detail, an application environment of the present application will be described. The technology of the application is mainly applied to the technical field of fuel cells for automobiles. The application is used for solving the problems of low sealing performance, low production and assembly efficiency, high production cost and incapability of meeting the requirement of mass production of the sealing element of the single cell structure of the fuel cell in the prior art.
Referring to fig. 1 to 2, the present application provides a single cell plate structure of a fuel cell, which includes:
in an exemplary embodiment of the present application, the plate body 1 includes a flow channel region 101 disposed at the middle, and a frame 102 disposed around the flow channel region 101; a medium passage 2 including a first gas passage 201, a second gas passage 202, and a cooling water passage 203 provided on the frame 102; the first gas channel boss 3 is arranged on the frame 102 around the first gas channel 201, a communication channel 301 extending towards the flow channel region 101 is arranged on the first gas channel boss 3, and the communication channel 301 is used for communicating the first gas channel 201 with the flow channel region 101; the injecting glue seal groove 4 is arranged on the frame 102, the injecting glue seal groove 4 comprises a main seal groove 401 arranged along the circumferential direction, a first seal groove 402 and a second seal groove 403 communicated with the main seal groove 401, the first seal groove 402 is arranged around the second gas channel 202, and the second seal groove 403 is arranged around the cooling water channel 203.
In this embodiment, by providing the first seal groove 402 and the second seal groove 403 on the polar plate body 1 and communicating with the main seal groove 401, the first seal groove 402 is disposed around the second gas channel 202, the second seal is disposed around the cooling water channel 203, the first gas channel boss 3 is disposed at the first gas channel 201, and the structural design of the communication channel 301 is disposed between the first gas channel boss 3 and the flow channel region 101, so that when the sealant is injected into the sealant injection seal groove 4 in the polar plate body 1, a peripheral seal can be formed at the second gas channel 202 and the cooling water channel 203, a sealing structure is formed at the first gas channel 201 by avoiding the communication channel 301 through the first gas channel boss 3, so that the sealing structure is prevented from blocking the air inlet at the first gas channel 201, and the peripheral seal is formed in the first seal groove 402 and the second seal channel 403 through the second gas channel 202 and the cooling water channel 203, the medium in the medium channel 2 can be effectively prevented from being leaked mutually, and thus the sealing performance is ensured, and the sealing structure is prevented from forming a sealing structure at the integral seal structure when the first seal groove 402, the second seal groove 403 and the main seal channel 203 are easily communicated with the main seal groove 203, thus the sealing structure is prevented from forming a clean water-down, and the sealing structure is prevented from forming a sealing structure at the sealing structure, and forming a low-temperature, and the sealing structure is prevented from forming a failure due to the sealing structure when the sealing structure is caused by the sealing failure of the sealing structure and has a low temperature and the sealing structure; and the sealing structure is formed by injecting the sealant once, so that the sealing performance is ensured, the production efficiency is effectively improved, and the production cost is reduced.
In another exemplary embodiment, the first gas channel 201 includes a first gas inlet channel 201a and a first gas outlet channel 201b, the second gas channel 202 includes a second gas inlet channel 202a and a second gas outlet channel 202b, and the cooling water channel 203 includes a cooling water inlet channel 203b and a cooling water outlet channel 203c.
In an exemplary embodiment of the present application, the communication channel 301 includes a duct 301a, a converging channel 301b and a flow expansion region 301c, the duct 301a is in communication with the first gas channel 201, the flow expansion region 301c is in communication with the flow channel region 101, the converging channel 301b is disposed between the duct 301a and the flow expansion region 301c, and the converging channel 301b is used for communicating the duct 301a with the flow expansion region 301 c.
In this embodiment, the first gas in the first gas channel 201 enters the converging groove 301b through the duct 301a, flows through the converging groove 301b and flows into the flow passage area 101 through the flow passage expansion area 301 c. The diffusion area of the first gas can be increased through the design of the duct 301a and the flow passage expansion area 301c, so that the first gas can be more uniformly distributed into the flow passage area 101 of the polar plate body 1, the reaction contact area of the first gas entering the reaction area is increased, and the utilization rate of the first gas in the electrochemical reaction is improved; by arranging the converging groove 301b between the duct 301a and the flow passage expansion region 301c, the uniformity of the gas distribution of the first gas entering the flow passage region 101 can be effectively improved, so that the first gas can be smoothly distributed between the duct 301a and the flow passage expansion region 301c, and the reaction efficiency and stability of the fuel cell can be improved.
In an exemplary embodiment of the present application, a plurality of glue injection connection holes 401a are uniformly distributed in the main seal groove 401 along the circumferential direction, the glue injection connection holes 401a are disposed through in the thickness direction of the plate body 1, and the plurality of glue injection connection holes 401a are symmetrical with respect to the center of the plate body 1.
In this embodiment, four glue injection connecting holes 401a are uniformly distributed in the main seal groove 401 along the circumferential direction, the glue injection connecting holes 401a are formed in a penetrating manner along the thickness direction of the polar plate body 1, and sealant is injected into the glue injection connecting holes 401a by aligning the sealant from the outer side of the polar plate body 1, so that an integrated seal structure is formed in the glue injection seal groove 4.
In an exemplary embodiment of the present application, a glue blocking structure 5 protruding toward the opening direction of the glue injection sealing groove 4 is disposed between the main sealing groove 401 and the converging groove 301b, and between the secondary sealing groove 403 and the converging groove 301 b.
In this embodiment, the glue blocking structure 5 can effectively block the sealant from flowing into the flow channel expansion area 301c in the process of injecting the sealant in the sealant injection sealing groove 4, and the glue blocking structure 5 is a convex rib structure protruding towards the membrane electrode, so that the glue blocking function can be realized, and meanwhile, a reinforcing structure can be formed on the polar plate, thereby improving the structural strength of the polar plate; the glue blocking structure 5 is designed, and can also effectively block the overflow of the sealant in the glue injection sealing groove 4 into the sink 301b, so that the blocking of the communication channel 301 is avoided, the sealing performance is ensured, and meanwhile, the smoothness of the working medium in the communication channel 301 is ensured.
In an exemplary embodiment of the present application, a plate reinforcing structure 6 protruding toward the opening direction of the glue injection sealing groove 4 is provided between adjacent glue injection connection holes 401a located in the sealing groove on the long side of the plate body 1.
In this embodiment, through the bellied polar plate additional strengthening 6 of the same direction orientation of the last setting of polar plate body 1 with injecting glue seal groove 4 opening, polar plate additional strengthening 6 be used for with the membrane electrode butt, can provide holding power to the membrane electrode through polar plate additional strengthening 6 to avoid single cell because injecting glue pressure is too big in the injecting glue process, cause membrane electrode warpage damage, simultaneously from becoming the strengthening rib on polar plate body 1 through polar plate additional strengthening 6, thereby improve the structural strength of polar plate body 1, avoid polar plate body 1 to take place warp deformation's risk in the transportation.
In an exemplary embodiment of the present application, the plate body 1 is circumferentially provided with a plurality of glue injection vent holes 7, the glue injection vent holes 7 are located at a side of the main seal groove 401 away from the runner area 101, and the glue injection vent holes 7 are disposed through in a thickness direction of the plate body 1.
In this embodiment, by injecting sealant into the sealant connection hole 401a, the sealant enters the sealant injection seal groove 4, and the gas inside the sealant injection seal groove 4 discharges the redundant gas inside through the sealant injection vent hole 7 formed on the polar plate body 1, so as to balance the pressure of the gas inside, ensure the pressure balance of the sealant injection, and avoid the problem of air pocket in the sealing structure formed in the sealant injection seal groove 4, thereby improving the sealing performance of the single cell.
In an exemplary embodiment of the present application, a glue injection overflow groove 8 is provided between the main seal groove 401 and the runner area 101, and the glue injection overflow groove 8 extends along the long side direction of the plate body 1.
In this embodiment, the glue overflow groove 8 disposed between the runner area 101 and the main seal groove 401 can effectively avoid the hidden trouble of pollution to the runner area 101 when glue overflows during the glue injection in the glue injection seal groove 4.
In an exemplary embodiment of the present application, the second gas passage 202 is provided with a second gas passage boss 202c protruding toward the opening direction of the glue injection seal groove 4 in the circumferential direction, the cooling water passage 203 is provided with a cooling water passage boss 203a protruding toward the opening direction of the glue injection seal groove 4 in the circumferential direction, the first seal groove 402 is provided around the second gas passage boss 202c, and the second seal groove 403 is provided around the cooling water passage boss 203 a.
In this embodiment, the membrane electrode is in a flat planar structure, and since the glue injection sealing groove 4 is formed on the electrode plate body 1, the first sealing groove 402 and the second sealing groove 403 are disposed around the second gas channel 202 and the cooling water channel 203, so that the second gas channel boss 202c and the cooling water channel boss 203a are formed on the electrode plate body 1, thereby avoiding the sealant flowing into the second gas channel 202 or the cooling water channel 203, and affecting the smooth performance of medium circulation in the second gas channel 202 or the cooling water channel 203.
In an exemplary embodiment of the present application, the plate body 1 is an anode plate, the first gas channel 201 is used to provide a flow channel for the first gas, and the second gas channel 202 is used to provide a flow channel for the second gas.
In an exemplary embodiment of the present application, the plate body 1 is a cathode plate, the first gas channel 201 is used to provide a flow channel for the second gas, and the second gas channel 202 is used to provide a flow channel for the first gas.
By way of example, the anode plate, the membrane electrode and the cathode plate are sequentially stacked to form a single cell frame, sealing glue is injected into the glue injection connecting hole 401a formed in the electrode plate body 1, the sealing glue forms a sealing structure in the glue injection sealing groove 4, the electrode plate and the membrane electrode are in sealing connection to form a single cell structure, and the sealing structure is of an integrated structure, so that the sealing performance is effectively improved, and meanwhile, the production efficiency is improved.
Working principle: according to the electrode plate structure, the single cell comprises two electrode plate bodies 1 and a membrane electrode which are stacked, and the sealant is injected into the sealant connecting hole 401a to form a sealing structure in the sealant sealing groove 4, so that the first gas channel 201, the second gas channel 202 and the cooling water channel 203 of the electrode plate body 1 are sealed while the single cell structure is connected in a sealing mode, and the problem of mutual internal leakage between the medium channels 2 is avoided. Through the first gas channel boss 3 arranged on the polar plate body 1, the sealant can avoid forming a seal between the first gas channel 201 and the runner area 101 in the glue injection sealing groove 4, and meanwhile, the first gas channel 201, the cooling water channel 203 and the second gas channel 202 can be separated, so that the second gas or cooling water is prevented from entering the runner area 101. The fuel cell pole plate structure provided by the application is used for adaptively producing the integrated glue injection sealed fuel cell, so that the sealing performance and the production efficiency of the cell are effectively improved, the assembly process of the cell is simplified, and the production cost of the fuel cell is reduced, thereby having the beneficial effect of meeting the mass production requirement of the cell; and the sealing structure integrally formed in the glue injection sealing groove 4 effectively reduces the ratio of the area of the polar plate of the sealing structure, thereby increasing the area ratio of the effective reaction area of the single cell structure and further improving the volume ratio power density of the fuel cell. Glue blocking structure 5 through setting up on the polar plate has effectively avoided the glue filling seal groove 4 in the glue filling glue overflow to block up sink 301b, glue filling overflow groove 8 that sets up on polar plate body 1 has effectively avoided polar plate body 1 to go out the glue overflow on the long limit and has caused runner district 101 to pollute, polar plate additional strengthening 6 through setting up on polar plate body 1, polar plate additional strengthening 6 that sets up on anode plate and the negative plate set up relatively, and all with the membrane electrode butt, apply a support to the membrane electrode through polar plate additional strengthening 6 for the membrane electrode can effectively avoid because the too big beneficial effect that causes polar plate warpage damage of glue filling pressure.
The above embodiments are merely preferred embodiments for fully explaining the present application, and the scope of the present application is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present application, and are intended to be within the scope of the present application.
Claims (10)
1. A fuel cell battery plate structure, comprising:
the polar plate body comprises a flow passage area arranged in the middle and a frame arranged around the flow passage area;
the medium channel comprises a first gas channel, a second gas channel and a cooling water channel which are arranged on the frame;
the first gas channel boss is arranged on the frame around the first gas channel, a communication channel extending towards the flow channel area is arranged on the first gas channel boss, and the communication channel is used for communicating the first gas channel with the flow channel area;
the injecting glue seal groove is arranged on the frame, the injecting glue seal groove comprises a main seal groove arranged along the circumferential direction, a first seal groove and a second seal groove, wherein the first seal groove and the second seal groove are communicated with the main seal groove, the first seal groove is arranged around the second gas channel, and the second seal groove is arranged around the cooling water channel.
2. The fuel cell single cell plate structure according to claim 1, wherein: the communication channel comprises a duct, a converging groove and a flow passage expansion area, the duct is communicated with the first gas channel, the flow passage expansion area is communicated with the flow passage area, the converging groove is arranged between the duct and the flow passage expansion area, and the converging groove is used for communicating the duct with the flow passage expansion area.
3. The fuel cell single cell plate structure according to claim 1, wherein: a plurality of injecting glue connecting holes are uniformly distributed in the main sealing groove along the circumferential direction, the injecting glue connecting holes penetrate through the polar plate body along the thickness direction, and the injecting glue connecting holes are symmetrical about the center of the polar plate body.
4. The fuel cell single cell plate structure according to claim 2, wherein: and a glue blocking structure protruding towards the opening direction of the glue injection sealing groove is arranged between the main sealing groove and the converging groove and between the secondary sealing groove and the converging groove.
5. A fuel cell single cell plate structure according to claim 3, wherein: and a polar plate reinforcing structure protruding towards the opening direction of the glue injection sealing groove is arranged between adjacent glue injection connecting holes on the long edge of the polar plate body and positioned in the sealing groove.
6. The fuel cell single cell plate structure according to claim 4, wherein: the polar plate body has a plurality of injecting glue exhaust holes along circumference distribution, and is a plurality of injecting glue exhaust holes are located the main seal groove is kept away from one side of runner district, injecting glue exhaust hole is followed the thickness direction of polar plate runs through the setting.
7. The fuel cell single cell plate structure according to claim 6, wherein: and a glue injection overflow groove is arranged between the main sealing groove and the flow channel area, and extends along the long side direction of the polar plate body.
8. The fuel cell single cell plate structure according to claim 1, wherein: the second gas channel is provided with a second gas channel boss protruding towards the opening direction of the glue injection sealing groove along the circumferential direction, the cooling water channel is provided with a cooling water channel boss protruding towards the opening direction of the glue injection sealing groove along the circumferential direction, the first sealing groove is arranged around the second gas channel boss, and the second sealing groove is arranged around the cooling water channel boss.
9. The fuel cell single cell plate structure according to claim 1, wherein: the polar plate body is an anode plate, the first gas channel is used for providing a circulation channel for first gas, and the second gas channel is used for providing a circulation channel for second gas.
10. The fuel cell single cell plate structure according to claim 9, wherein: the polar plate body is a cathode plate, the first gas channel is used for providing a circulation channel for the second gas, and the second gas channel is used for providing a circulation channel for the first gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310933080.5A CN116960387A (en) | 2023-07-27 | 2023-07-27 | Fuel cell single cell polar plate structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310933080.5A CN116960387A (en) | 2023-07-27 | 2023-07-27 | Fuel cell single cell polar plate structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116960387A true CN116960387A (en) | 2023-10-27 |
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ID=88444259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310933080.5A Pending CN116960387A (en) | 2023-07-27 | 2023-07-27 | Fuel cell single cell polar plate structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116960387A (en) |
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2023
- 2023-07-27 CN CN202310933080.5A patent/CN116960387A/en active Pending
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