CN115084570B - Glue injection structure for bipolar plate and glue injection sealed bipolar plate - Google Patents
Glue injection structure for bipolar plate and glue injection sealed bipolar plate Download PDFInfo
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- CN115084570B CN115084570B CN202210958582.9A CN202210958582A CN115084570B CN 115084570 B CN115084570 B CN 115084570B CN 202210958582 A CN202210958582 A CN 202210958582A CN 115084570 B CN115084570 B CN 115084570B
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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
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
- H01M8/0276—Sealing means characterised by their form
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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
- H01M8/02—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
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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
- H01M8/02—Details
- H01M8/0202—Collectors; Separators, e.g. bipolar separators; Interconnectors
- H01M8/0267—Collectors; Separators, e.g. bipolar separators; Interconnectors having heating or cooling means, e.g. heaters or coolant flow channels
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention belongs to the field of fuel cells, and provides a glue injection structure for a bipolar plate and a glue injection sealed bipolar plate. The first sealing groove is used for separating an air inlet, a cooling liquid inlet, a hydrogen outlet and a reaction zone. The second sealing groove is used for separating a hydrogen inlet, a cooling liquid outlet, an air outlet and a reaction zone. The third sealing groove is arranged at the edge of one side, far away from the cathode plate and the anode plate, of the cathode plate and the third sealing groove on the anode plate are communicated at the outer edge of the bipolar plate, and the third sealing groove is communicated with the first sealing groove and the second sealing groove. During glue injection, glue can flow in the first sealing groove, the second sealing groove and the third sealing groove, and the glue flows to the other side of the bipolar plate from the glue injection side on the outer side of the bipolar plate, so that the purpose of double-sided glue injection is achieved. The glue injection structure for the bipolar plate simplifies the structure of the bipolar plate.
Description
Technical Field
The invention relates to the technical field of fuel cells, in particular to a glue injection structure and a glue injection sealing bipolar plate for a bipolar plate.
Background
The hydrogen fuel cell is a power generation device which performs oxidation-reduction reaction of hydrogen and oxygen under the action of a catalyst to convert chemical energy into electric energy. The core components of the membrane electrode assembly generally comprise a membrane electrode assembly and a bipolar plate, wherein the membrane electrode assembly is used as a place for generating electrochemical reaction and mainly plays roles in proton conduction and reaction gas isolation, and the bipolar plate mainly plays roles in structural support, reaction gas distribution, current collection conduction and reaction heat conduction.
The electrochemical reaction of the hydrogen fuel cell needs to be carried out under certain hydrothermal conditions, and heat continuously generated and accumulated in the reaction process needs to be drained to the outside of the cell in time through cooling liquid so as to maintain the stability of the internal environment of the cell. Hydrogen, air and cooling liquid are isolated from each other and cannot mix in the battery, so the sealing reliability of each fluid is a precondition for stable operation of the battery.
At present, the sealing between all fluids in the battery is mostly completed by a bipolar plate injection molding sealing structure. Particularly, a plurality of glue passing holes penetrating through the bipolar plate are required to be formed in the bipolar plate so as to achieve the purpose of double-sided sealant injection, but the sealing structure increases the complexity of a stamping die used for forming the bipolar plate and the difficulty of the laser welding process of the bipolar plate.
Disclosure of Invention
The invention provides a glue injection structure for a bipolar plate and a glue injection sealed bipolar plate, which are used for solving the defects of the prior art that the complexity of a stamping die is increased and the laser welding difficulty is increased due to the fact that glue passing holes penetrating through the bipolar plate are formed in the bipolar plate to achieve the purpose of injecting sealant on two sides, and the third sealing groove is communicated at the outer edge of the bipolar plate, so that the structure of the bipolar plate is simplified, and the complexity of the stamping die and the laser welding difficulty of the bipolar plate are reduced.
The invention provides a glue injection structure for a bipolar plate, which comprises a first sealing groove, a second sealing groove and a third sealing groove which are arranged on a cathode plate and an anode plate, wherein: the first sealing groove is arranged at the outer sides of an air inlet, a cooling liquid inlet and a hydrogen outlet of the bipolar plate, and the air inlet, the cooling liquid inlet and the hydrogen outlet are respectively divided into independent areas by the first sealing groove; the second sealing groove is arranged at the outer sides of the hydrogen inlet, the cooling liquid outlet and the air outlet of the bipolar plate and divides the hydrogen inlet, the cooling liquid outlet and the air outlet into independent areas respectively; the third sealing groove is arranged at the edge of one side of the cathode plate, which is far away from the anode plate, and the edge of one side of the anode plate, which is far away from the cathode plate, the third sealing groove on the cathode plate and the third sealing groove on the anode plate are communicated at the outer edge of the bipolar plate, and the first sealing groove and the second sealing groove are communicated with the third sealing groove.
According to the glue injection structure for the bipolar plate, the first sealing groove comprises a first outer ring sealing groove surrounding the air inlet, the cooling liquid inlet and the hydrogen outlet, and a first separation sealing groove arranged among the air inlet, the cooling liquid inlet and the hydrogen outlet, and the first separation sealing groove is communicated with the first outer ring sealing groove.
According to the glue injection structure for the bipolar plate, provided by the invention, the second sealing groove comprises a second outer ring sealing groove surrounding the outer sides of the hydrogen inlet, the cooling liquid outlet and the air outlet and a second separation sealing groove arranged among the hydrogen inlet, the cooling liquid outlet and the air outlet, and the second separation sealing groove is communicated with the second outer ring sealing groove.
According to the glue injection structure for the bipolar plate provided by the invention, the third sealing groove comprises the annular sealing grooves which surround the first sealing groove, the second sealing groove and the outer side of the reaction zone, the cathode plate and the anode plate are respectively provided with at least one annular sealing groove, and the annular sealing groove positioned on the cathode plate is communicated with the annular sealing groove positioned on the anode plate at the outer edge of the bipolar plate.
According to the glue injection structure for the bipolar plate, when the number of the annular sealing grooves on the cathode plate or the anode plate is more than one, a glue solution channel is arranged between every two adjacent annular sealing grooves.
The invention also provides a glue injection sealing bipolar plate, which comprises a cathode plate and an anode plate, wherein the glue injection structure for the bipolar plate is arranged on the outer sides of the cathode plate and the anode plate, and sealant is filled in the glue injection structure.
According to the glue injection sealing bipolar plate provided by the invention, at least two positioning holes are arranged on the cathode plate and the anode plate, and the positioning holes penetrate through the cathode plate and the anode plate.
According to the glue injection sealing bipolar plate provided by the invention, an air channel communicated with an air inlet and an air outlet is arranged on one side of the cathode plate, which is far away from the anode plate.
According to the glue injection sealing bipolar plate provided by the invention, one side of the anode plate, which is far away from the cathode plate, is provided with a hydrogen channel which is used for being communicated with a hydrogen inlet and a hydrogen outlet.
According to the glue injection sealing bipolar plate provided by the invention, a cooling liquid channel communicated with a cooling liquid inlet and a cooling liquid outlet is arranged between the cathode plate and the anode plate.
The invention provides a glue injection structure for a bipolar plate, which comprises a first sealing groove, a second sealing groove and a third sealing groove which are arranged on a cathode plate and an anode plate. The first sealing groove is arranged on the outer side of the air inlet, the cooling liquid inlet and the hydrogen outlet and is used for separating the air inlet, the cooling liquid inlet and the hydrogen outlet into independent areas respectively, and after the first sealing groove is filled with the sealant, the air in the air inlet, the cooling liquid in the cooling liquid inlet, the hydrogen in the hydrogen outlet and the reaction gas in the reaction area can be guaranteed not to mix and flee, and the sealing reliability of each fluid is guaranteed. The second seal groove is arranged on the outer side of the hydrogen inlet, the cooling liquid outlet and the air outlet and is used for separating the hydrogen inlet, the cooling liquid outlet and the air outlet into independent areas respectively, and after the second seal groove is filled with the sealant, the hydrogen in the hydrogen inlet, the air in the air outlet, the cooling liquid in the cooling liquid outlet and the reaction gas in the reaction area can be guaranteed not to mix and flee, and the sealing reliability of each fluid is guaranteed. The third sealing groove is arranged at the edge of one side of the cathode plate far away from the anode plate and the edge of one side of the anode plate far away from the cathode plate, the third sealing groove on the cathode plate and the third sealing groove on the anode plate are communicated at the outer edge of the bipolar plate, and the third sealing groove is communicated with the first sealing groove and the second sealing groove. During glue injection, glue can flow in the first sealing groove, the second sealing groove and the third sealing groove, and the glue flows to the other side of the bipolar plate from the glue injection side on the outer side of the bipolar plate, so that the purpose of double-sided glue injection is achieved. The glue injection structure for the bipolar plate provided by the invention does not need to form glue through holes on the bipolar plate, simplifies the structure of the bipolar plate, and further reduces the complexity of a stamping die and the welding difficulty of laser welding.
Further, in the bipolar plate with glue injection sealing provided by the invention, the glue injection structure for the bipolar plate is arranged, so that the bipolar plate with glue injection sealing has the same advantages as the bipolar plate with glue injection structure.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of a cathode plate side of a glue injection sealed bipolar plate provided by the present invention;
fig. 2 is a schematic structural diagram of the anode plate side of the glue injection sealed bipolar plate provided by the invention;
FIG. 3 is an exploded view of a glue-injected sealed bipolar plate provided by the present invention;
FIG. 4 is a schematic structural view of a cathode plate provided by the present invention;
FIG. 5 is a schematic structural view of an anode plate provided by the present invention;
FIG. 6 is an A-A view of FIG. 1 provided with the present invention;
FIG. 7 is a view from direction B-B of FIG. 1 provided by the present invention;
figure 8 is a cross-sectional view at the air inlet of a bipolar plate provided by the present invention;
figure 9 is a cross-sectional view at the coolant inlet of a bipolar plate provided by the present invention;
figure 10 is a cross-sectional view of the coolant channels of a bipolar plate provided by the present invention;
reference numerals are as follows:
110. a cathode plate; 120. an anode plate; 130. an air inlet; 140. an air outlet; 150. a coolant inlet; 160. a coolant outlet; 170. a hydrogen inlet; 180. a hydrogen outlet; 190. a reaction zone; 200. sealing the body; 310. a first seal groove; 311. a first outer ring seal groove; 312. a first partition seal groove; 320. a second seal groove; 321. a second outer ring seal groove; 322. a second partition seal groove; 330. a third seal groove; 331. a glue solution channel; 410. positioning holes; 420. an air channel; 430. a hydrogen gas passage; 440. a coolant channel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The glue injected structure and the glue injected sealed bipolar plate for a bipolar plate of the present invention will be described below with reference to fig. 1 to 10.
The invention provides a glue injection structure for a bipolar plate, which comprises a first sealing groove 310, a second sealing groove 320 and a third sealing groove 330, wherein the first sealing groove 310 is respectively arranged on one side of a cathode plate 110 away from an anode plate 120 and one side of the anode plate 120 away from the cathode plate 110, the second sealing groove 320 is respectively arranged on one side of the cathode plate 110 away from the anode plate 120 and one side of the anode plate 120 away from the cathode plate 110, and the third sealing groove 330 is respectively arranged on one side of the cathode plate 110 away from the anode plate 120 and one side of the anode plate 120 away from the cathode plate 110.
Referring to fig. 1 and 4, the first sealing groove 310 is disposed at the left side of the reaction region 190 of the cathode plate 110, the second sealing groove 320 is disposed at the right side of the reaction region 190 of the cathode plate 110, and the third sealing groove 330 surrounds the left side of the first sealing groove 310, the upper side of the reaction region 190, the right side of the second sealing groove 320, and the lower side of the reaction region 190.
Referring to fig. 2 and 5, a first seal groove 310 is disposed at the right side of the reaction region 190 of the anode plate 120, a second seal groove 320 is disposed at the left side of the reaction region 190 of the anode plate 120, and a third seal groove 330 surrounds the left side of the second seal groove 320, the upper side of the reaction region 190, the right side of the first seal groove 310, and the lower side of the reaction region 190.
The first sealing grooves 310 of the cathode plate 110 and the anode plate 120 are used for separating the air inlet 130, the coolant inlet 150, the hydrogen outlet 180 and the reaction region 190, and after glue is injected into the first sealing grooves 310, the sealant can prevent the air entering from the air inlet 130, the coolant entering from the coolant inlet 150, the hydrogen discharged from the hydrogen outlet 180 and the gas in the reaction region 190 from mixing, so that the fluids flow in the respective flow spaces, and the sealing reliability of each fluid is ensured.
The second sealing grooves 320 of the cathode plate 110 and the anode plate 120 are used for separating the hydrogen inlet 170, the coolant outlet 160, the air outlet 140 and the reaction region 190, and after glue is injected into the second sealing grooves 320, the sealant can prevent the hydrogen gas entering from the hydrogen inlet 170, the coolant discharged from the coolant outlet 160, the air discharged from the air outlet 140 and the gas in the reaction region 190 from mixing, so that the fluids flow in the respective flow spaces, and the reliability of sealing of the fluids is ensured.
The third seal groove 330 on the cathode plate 110 and the third seal groove 330 on the anode plate 120 communicate at the outer edges of the cathode plate 110 and the anode plate 120, and the first seal groove 310 and the second seal groove 320 both communicate with the third seal groove 330.
During glue injection, the cathode plate 110 and the anode plate 120 welded together can be placed on a glue injection mold, the size of the inner side edge of the glue injection mold is larger than the size of the outer edges of the cathode plate 110 and the anode plate 120, for example, glue is injected at one side of the cathode plate 110, because the first sealing groove 310 and the second sealing groove 320 are both communicated with the third sealing groove 330, the sealant can flow in the first sealing groove 310, the second sealing groove 320 and the third sealing groove 330 on the cathode plate 110, and the sealant can flow to one side of the anode plate 120 through the outer edge of the cathode plate 110 and then flow into the third sealing groove 330, the second sealing groove 320 and the first sealing groove 310 on the anode plate 120 until the first sealing groove 310, the second sealing groove 320 and the third sealing groove 330 of the anode plate 110 and the anode plate 120 are filled with the sealant, thereby achieving the effect of double-sided glue injection.
In the prior art, the glue holes are formed in the glue injection groove, the sealant flows from one side of the cathode plate 110 to one side of the anode plate 120 through the glue holes to realize the effect of double-sided glue injection, and the complex degree of a stamping die used for forming the polar plate and the process difficulty of laser welding of the bipolar plate are increased due to the glue holes.
The glue injection structure for the bipolar plate provided by the application has the advantages that the first sealing groove 310 and the second sealing groove 320 are communicated with the third sealing groove 330, the third sealing groove 330 positioned between the cathode plate 110 and the anode plate 120 is communicated at the outer edge of the bipolar plate, the glue solution flows to the other side of the bipolar plate from the glue injection side outside the bipolar plate, and the effect of double-sided sealing is finally realized.
The glue injection structure for the bipolar plate provided by the invention does not need to be provided with a glue passing hole structure, so that the structure of the bipolar plate is simplified, and the complexity of a stamping die used for forming the bipolar plate and the process difficulty of laser welding of the bipolar plate are further reduced.
In an embodiment of the present invention, the first sealing groove 310 on the cathode plate 110 is taken as an example for description, and the first sealing groove 310 on the anode plate 120 and the first sealing groove 310 on the cathode plate 110 are symmetrical structures, which will not be described in detail.
In this embodiment, the first seal groove 310 includes a first outer ring seal groove 311 and a first partition seal groove 312. Referring to fig. 4, the air inlet 130, the coolant inlet 150, and the hydrogen outlet 180 are disposed at the left side of the reaction region 190 of the cathode plate 110, and the air inlet 130, the coolant inlet 150, and the hydrogen outlet 180 are sequentially disposed from top to bottom.
The path of the first outer ring sealing groove 311 sequentially passes through the top of the air inlet 130, the left side of the cooling liquid inlet 150, the left side of the hydrogen outlet 180, the bottom of the hydrogen outlet 180, the right side of the cooling liquid inlet 150 and the right side of the air inlet 130, and finally returns to the top of the air inlet 130 to form a sealed sealing groove, and after sealant is injected into the first outer ring sealing groove 311, separation between the reaction zone 190 and the air inlet 130, between the cooling liquid inlet 150 and between the reaction zone 190 and the hydrogen outlet 180 is achieved.
A first partition seal groove 312 is further provided between the bottom of the air inlet 130 and the top of the coolant inlet 150, and between the bottom of the coolant inlet 150 and the top of the hydrogen outlet 180, and the first partition seal groove 312 is communicated with the first outer ring seal groove 311. After the sealant is injected into the first partition sealing groove 312, the fluids in the air inlet 130, the coolant inlet 150, and the hydrogen outlet 180 are prevented from mixing with each other.
In this way, the first seal groove 310 formed by the first outer ring seal groove 311 and the first partition seal groove 312 separates the air inlet 130, the coolant inlet 150, the hydrogen outlet 180, and the reaction zone 190, and ensures the sealing performance of the respective fluids flowing in the respective spaces.
In an embodiment of the present invention, the second sealing groove 320 of the cathode plate 110 is taken as an example for description, and the second sealing groove 320 of the anode plate 120 and the second sealing groove 320 of the cathode plate 110 are symmetrical structures, which will not be described in detail.
In this embodiment, the second seal groove 320 includes a second outer ring seal groove 321 and a second partition seal groove 322. Referring to fig. 4, the hydrogen inlet 170, the coolant outlet 160, and the air outlet 140 are disposed at the right side of the reaction zone 190 of the cathode plate 110, and the hydrogen inlet 170, the coolant outlet 160, and the air outlet 140 are sequentially disposed from top to bottom.
The path of the second outer ring sealing groove 321 sequentially passes through the top of the hydrogen inlet 170, the left side of the cooling liquid outlet 160, the left side of the air outlet 140, the bottom of the air outlet 140, the right side of the cooling liquid outlet 160 and the right side of the hydrogen inlet 170, and finally returns to the top of the hydrogen inlet 170 to form a closed sealing groove, and after sealant is injected into the second outer ring sealing groove 321, the separation between the reaction zone 190 and the air outlet 140, the separation between the cooling liquid outlet 160 and the separation between the reaction zone 190 and the hydrogen inlet 170 are realized.
A second partition sealing groove 322 is further provided between the top of the air outlet 140 and the bottom of the coolant outlet 160, and between the top of the coolant outlet 160 and the bottom of the hydrogen inlet 170, and the second partition sealing groove 322 is communicated with the second outer ring sealing groove 321. After the sealant is injected into the second partition sealing groove 322, the fluids in the air outlet 140, the coolant outlet 160, and the hydrogen inlet 170 are prevented from being mixed with each other.
Thus, the second seal groove 320 formed by the second outer ring seal groove 321 and the second partition seal groove 322 realizes the partition among the air outlet 140, the cooling liquid outlet 160, the hydrogen inlet 170 and the reaction zone 190, and ensures the sealing performance of the flow of each fluid in the respective spaces.
In an embodiment of the present invention, the third sealing groove 330 located at one side of the cathode plate 110 is taken as an example for description, and the third sealing groove 330 located at one side of the anode plate 120 and the third sealing groove 330 located at one side of the cathode plate 110 are symmetrical structures, which are not specifically described.
Referring to fig. 4, in this embodiment, the third sealing groove 330 includes three annular sealing grooves, which are sequentially distributed from the center of the cathode plate 110 to the outside, taking the innermost annular sealing groove as an example, the left and right sides of the annular sealing groove coincide with the left side of the first outer ring sealing groove 311 and the right side of the second outer ring sealing groove 321, so as to achieve the communication between the innermost annular sealing groove and the first outer ring sealing groove 311 and the second outer ring sealing groove 321, the top of the annular sealing groove is located at the top of the reaction zone 190, and the bottom of the annular sealing groove is located at the bottom of the reaction zone 190.
The other two annular seal grooves are distributed outwards in sequence along the center of the cathode plate 110, a plurality of glue solution channels 331 are arranged between the two adjacent annular seal grooves along the extending direction of the annular seal grooves, and the glue solution channels 331 are used for communicating the two adjacent annular seal grooves.
The side of the annular sealing groove located at the outermost side away from the center of the cathode plate 110 is open for mutual communication with the annular sealing groove located at the outermost side of the anode plate 120.
The structure of the first sealing groove 310 will be described by taking the first sealing groove 310 on the cathode plate 110 as an example. The outer edges of the air inlet 130, the coolant inlet 150, and the hydrogen outlet 180 of the cathode plate 110 are provided with first protrusions facing away from the anode plate 120, the top, bottom, left, and right sides of the first seal groove 310 are provided with second protrusions facing away from the anode plate 120 of the cathode plate 110, and a first outer ring seal groove 311 is formed between the first protrusions and the second protrusions. A first partition seal groove 312 communicating with the first outer ring seal groove 311 is formed between the first projection at the bottom of the air inlet 130 and the first projection at the top of the coolant inlet 150, the first projection at the bottom of the coolant inlet 150, and the first projection at the top of the hydrogen outlet 180.
The second sealing groove 320 on the cathode plate 110 and the first and second sealing grooves 310 and 320 on the anode plate 120 have the same structure as the first sealing groove 310 on the cathode plate 110, and will not be described in detail herein.
Taking the third sealing groove 330 on the cathode plate 110 as an example, two rings of annular protrusions are arranged on the outer edge of the side of the cathode plate 110 away from the anode plate 120, the outermost ring of annular sealing groove is formed between the outer annular protrusion and the edge of the cathode plate 110, the middle layer of annular sealing groove is formed in the region between the two annular protrusions, and the inner annular sealing groove is formed between the inner annular protrusion and the reaction zone 190, the first sealing groove 310 and the second sealing groove 320.
The two circles of annular bulges are discontinuous bulges along the direction of the extending path of the two circles of annular bulges, and a glue solution channel 331 is formed between the two discontinuous bulges, so that the flow of the molten glue solution is facilitated during glue injection.
The first sealing groove 310, the second sealing groove 320 and the third sealing groove 330 are formed by protrusions on two sides, and after glue injection is completed, the sealing body 200 is matched with the appearance of the bipolar plate, and the protrusions and the recesses are opposite to each other in the thickness direction to form a clamping structure, so that the structural stability of the glue injection polar plate is facilitated.
The invention also provides an injection sealing bipolar plate, which comprises a cathode plate 110 and an anode plate 120, wherein the back surfaces of the cathode plate 110 and the anode plate 120 are welded together by using a laser welding process. The injection-resin structure for bipolar plates as described above is provided on the front surfaces of the cathode plate 110 and the anode plate 120. Due to the arrangement of the glue injection structure, the same advantages as described above can be achieved. After the glue injection is completed, the sealing body 200 formed by the glue solution forms planes along the two sides of the thickness direction, and the planes are in contact sealing when the sealing body is stacked and assembled with the membrane electrode assembly. When the galvanic pile is pressed, the sealing body 200 cannot be twisted, deformed and dislocated due to the pressing force, and the sealing reliability is guaranteed.
In an embodiment of the present invention, at least two positioning holes 410 are disposed on the cathode plate 110 and the anode plate 120, when the cathode plate 110 and the anode plate 120 are sealed by injection, the cathode plate 110 and the anode plate 120 need to be placed on an injection mold, and the two positioning holes 410 can fix the positions of the cathode plate 110 and the anode plate 120. Two positioning holes 410 can fix the positions of the cathode plate 110 and the anode plate 120, two positioning holes 410 can be arranged at two corners of opposite corners of the bipolar plate, and the positioning holes 410 penetrate through the bipolar plate. Of course, the number of the positioning holes 410 may be greater than two, for example, four positioning holes 410 may be provided at four corners of the bipolar plate.
In one embodiment of the present invention, the reaction region 190 of the cathode plate 110 on the side away from the anode plate 120 is provided with air channels 420 for communicating with the air inlet 130 and the air outlet 140.
In a specific embodiment, the reaction region 190 of the side of the cathode plate 110 away from the anode plate 120 is provided with a plurality of strip-shaped protrusions facing away from the anode plate 120, the plurality of strip-shaped protrusions form the channel for air flow therebetween, and the air channel 420 is used for guiding air from the air inlet 130 to the air outlet 140.
In one embodiment of the present invention, the reaction region 190 of the side of the anode plate 120 away from the cathode plate 110 is provided with a hydrogen channel 430 for communicating with the hydrogen inlet 170 and the hydrogen outlet 180.
In a specific embodiment, the reaction region 190 of the side of the anode plate 120 away from the cathode plate 110 is provided with a plurality of strip-shaped protrusions facing away from the cathode plate 110, the plurality of strip-shaped protrusions form the channel for hydrogen gas to flow through, and the hydrogen gas channel 430 is used for introducing hydrogen gas from the hydrogen gas inlet 170 to the hydrogen gas outlet 180.
In one embodiment of the present invention, a cooling fluid channel 440 for communicating the cooling fluid inlet 150 and the cooling fluid outlet 160 is disposed between the cathode plate 110 and the anode plate 120.
In a specific embodiment, the strip-shaped protrusion for forming the air channel 420 and the strip-shaped protrusion for forming the hydrogen channel 430 are hollow inside, and the hollow inside can be used for flowing the cooling fluid, forming the cooling fluid channel 440 for guiding the cooling fluid from the cooling fluid inlet 150 to the cooling fluid outlet 160.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a injecting glue structure for bipolar plate which characterized in that, is including setting up first seal groove, second seal groove and the third seal groove on negative plate and positive plate, wherein:
the first sealing groove is arranged at the outer sides of an air inlet, a cooling liquid inlet and a hydrogen outlet of the bipolar plate, and the air inlet, the cooling liquid inlet and the hydrogen outlet are respectively divided into independent areas by the first sealing groove;
the second sealing groove is arranged at the outer sides of the hydrogen inlet, the cooling liquid outlet and the air outlet of the bipolar plate, and the hydrogen inlet, the cooling liquid outlet and the air outlet are respectively divided into independent areas by the second sealing groove;
the third sealing groove is arranged at the edge of one side of the cathode plate, which is far away from the anode plate, and the edge of one side of the anode plate, which is far away from the cathode plate, the third sealing groove on the cathode plate and the third sealing groove on the anode plate are communicated at the outer edge of the bipolar plate, and the first sealing groove and the second sealing groove are communicated with the third sealing groove.
2. The glue injection structure for bipolar plates according to claim 1, wherein the first seal groove comprises a first outer ring seal groove surrounding the outside of the air inlet, the coolant inlet and the hydrogen outlet, and a first partition seal groove disposed between the air inlet, the coolant inlet and the hydrogen outlet, the first partition seal groove communicating with the first outer ring seal groove.
3. The injection molding structure for bipolar plates according to claim 2, wherein the second sealing groove comprises a second outer ring sealing groove surrounding the outside of the hydrogen gas inlet, the cooling liquid outlet and the air outlet, and a second partition sealing groove provided between the hydrogen gas inlet, the cooling liquid outlet and the air outlet, the second partition sealing groove communicating with the second outer ring sealing groove.
4. The injection molding structure for bipolar plates according to claim 3, wherein the third sealing groove comprises an annular sealing groove surrounding the first sealing groove, the second sealing groove and the outside of the reaction zone, the cathode plate and the anode plate are both provided with at least one annular sealing groove, and the annular sealing groove on the cathode plate and the annular sealing groove on the anode plate are communicated with each other at the outer edge of the bipolar plate.
5. The glue injection structure for the bipolar plate according to claim 4, wherein when the number of the annular sealing grooves of the cathode plate or the anode plate is greater than one, a glue solution channel is arranged between two adjacent annular sealing grooves.
6. An injection-sealed bipolar plate, which is characterized by comprising a cathode plate and an anode plate, wherein the outsides of the cathode plate and the anode plate are provided with the injection structure for the bipolar plate according to any one of the claims 1~5, and the injection structure is filled with a sealant.
7. The glue-injected sealed bipolar plate of claim 6, wherein at least two positioning holes are formed on the cathode plate and the anode plate, and the positioning holes penetrate through the cathode plate and the anode plate.
8. The glue-injected sealed bipolar plate of claim 6, wherein the side of the cathode plate away from the anode plate is provided with air channels for communicating with an air inlet and an air outlet.
9. The glue-injected, sealed bipolar plate of claim 6, wherein the side of the anode plate remote from the cathode plate is provided with hydrogen channels for communication with a hydrogen inlet and a hydrogen outlet.
10. The bipolar plate of claim 6, wherein a coolant channel is disposed between the cathode plate and the anode plate to communicate a coolant inlet and a coolant outlet.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN212783523U (en) * | 2020-08-13 | 2021-03-23 | 珠海格力电器股份有限公司 | Bipolar plate and fuel cell |
| CN114023992A (en) * | 2021-11-05 | 2022-02-08 | 深圳市氢瑞燃料电池科技有限公司 | Integrated membrane electrode frame sealing structure with double-sided glue injection |
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| JP3920018B2 (en) * | 2000-10-19 | 2007-05-30 | 本田技研工業株式会社 | Fuel cell stack |
| CN112701315B (en) * | 2021-01-27 | 2024-06-25 | 福建亚南电机有限公司 | Sealing structure and sealing method of non-welded metal plate single cell |
| CN214753855U (en) * | 2021-03-29 | 2021-11-16 | 上海骥翀氢能科技有限公司 | Bipolar plate |
| CN113745563B (en) * | 2021-07-30 | 2023-06-20 | 东风汽车集团股份有限公司 | Bipolar plate assembly, manufacturing process thereof, electric pile and fuel cell vehicle |
| CN114335806A (en) * | 2021-12-31 | 2022-04-12 | 常州博瑞电力自动化设备有限公司 | Immersed liquid cooling energy storage battery box |
| CN114639839A (en) * | 2022-03-22 | 2022-06-17 | 上海骥翀氢能科技有限公司 | Metal bipolar plate sealing and coolant channel structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN212783523U (en) * | 2020-08-13 | 2021-03-23 | 珠海格力电器股份有限公司 | Bipolar plate and fuel cell |
| CN114023992A (en) * | 2021-11-05 | 2022-02-08 | 深圳市氢瑞燃料电池科技有限公司 | Integrated membrane electrode frame sealing structure with double-sided glue injection |
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