Integrated glue injection sealed fuel cell single cell structure, glue injection mold, manufacturing process and battery stack

Abstract

The present invention relates to an integrated glue-injection sealed fuel cell single cell structure, a glue-injection mold, a manufacturing process, and a battery stack. The integrated glue-injection sealed fuel cell single cell structure comprises: an anode plate, a membrane electrode, and a cathode plate stacked in sequence in the same direction to form a single cell frame structure. The single cell frame structure is provided with a plurality of glue-injection holes, through which sealant is injected to form a sealing structure. The single cell frame structure is sealed and connected through the sealing structure to form an integrated glue-injection sealed fuel cell single cell structure. The present application forms a single cell structure through a one-time glue-injection integrated sealing connection, effectively improving the sealing performance and production efficiency of the single cell, simplifying the single cell assembly process, reducing the production cost of the single cell, and meeting the beneficial effect of single cell mass production requirements. In addition, the one-piece formed sealing structure reduces the ratio of the sealing area to the plate area, thereby having the beneficial effect of increasing the proportion of the effective reaction area of ​​the single cell.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle fuel cells, and in particular to an integrated glue-injected sealed fuel cell single cell structure, a glue-injected mold, a manufacturing process, and a battery stack. Background Art

[0002] Fuel cells are power generation devices that convert the chemical energy of fuel and oxidant directly into electricity through an electrochemical reaction. A hydrogen fuel cell consists of components such as an anode plate, cathode plate, and membrane electrode assembly. Sealed elements provide a specific area for hydrogen, oxygen, and coolant to react and generate electricity. Automotive fuel cells typically require hundreds of cells connected in series to generate sufficient voltage. Traditional fuel cell stacks are constructed by alternately stacking and press-fitting bipolar plate assemblies and membrane electrode assemblies.

[0003] At present, the bipolar plate assembly is assembled by laser welding of cathode plates and anode plates. However, during the welding process, the cathode and anode plates are prone to defects such as weld penetration, ablation, slag splashing, cold welding, and air holes, which may lead to product scrapping. At the same time, the coatings of the cathode and anode plates are inevitably damaged, affecting product quality. In addition, the bipolar plates after welding may have defects such as warping, poor fitting or misalignment, which affect the sealing performance. The traditional sealing method mainly uses the bipolar plate and the membrane electrode to extrude the sealing element to form a contact seal, including the following two methods: bipolar plate bonding molding sealing ring and bipolar plate dispensing sealing. The bipolar plate bonding molding sealing ring is difficult to position during the bonding process because the material of the molded sealing ring is relatively soft. The thickness of the sealing ring is very thin, and the thickness and tightness of the glue coating are different, which will lead to sealing failure. In addition, the bipolar plate bonding molding sealing ring process has low production efficiency. Bipolar plate dispensing sealing mainly uses a dispensing machine to bond the sealing material to the bipolar plate. In order to ensure the uniformity of the thickness of the dispensing sealing ring, it is necessary to fully experimentally verify the process parameters of the sealing ring's starting point, end point, and joints, and customized tooling fixtures are required to position the bipolar plate. In addition, a long curing time is required after dispensing is completed, which seriously affects production efficiency.

[0004] In response to the above technical problems, the existing solutions are as follows: Prior art 1 forms an independent single cell assembly by bonding the anode plate, cathode plate and membrane electrode together. Although it avoids the welding defects and coating damage problems caused by laser welding of the bipolar plate, it also avoids the contamination of the cathode and anode flow fields and improves the assembly efficiency of the battery stack. However, the molten bonding part of this solution needs to be heated and glued before cooling and solidifying, and the sealing rings between the anode plate and the membrane electrode, between the cathode plate and the membrane electrode, and the water cavity on the cathode plate all need to be heated and cooled. The single cell structure needs to go through three heating and cooling cycles. Due to the high heating temperature and multiple heating, the membrane electrode reaction area is easily damaged and the single cell assembly is warped. In addition, the bonding method used in the single cell technical solution proposed in prior art 1 has the problems of cumbersome procedures, long curing time, and low production efficiency. Prior art 2 uses a single cell structure with a sealing ring formed by integrated glue injection. Although this solution solves the problem of cumbersome glue dispensing or bonding process, it improves the production efficiency of the single cell. However, this solution adopts an outer layer seal and a common pipeline island seal solution, which easily leads to the formation of a purge blind area in the cathode and anode cavities, making it difficult to discharge the water generated by the reaction; when the ambient temperature is below 0 degrees, there is a blockage of the flow channel or volume expansion after freezing, causing the seal to fail. Secondly, the sealing area of ​​this solution accounts for a large proportion, resulting in a low volume-to-power density of the fuel cell; in addition, the water cavity seal in the solution of the second existing technology adopts a contact compression seal. Since the contact surfaces on both sides of the water cavity seal are elastic elements, it is easy to cause the seal to fail due to assembly or processing errors.

[0005] Therefore, it is necessary to provide an integrated fuel cell single cell structure with glue injection sealing to take into account the sealing performance of the fuel cell single cell, production and assembly efficiency, and reduce production costs while meeting the needs of mass production, thereby solving the above problems. Summary of the Invention

[0006] One of the purposes of the present invention is to provide an integrated glue-injected sealed fuel cell single cell structure to solve the problems in the prior art of low sealing performance, low production and assembly efficiency, high production cost and inability to meet mass production needs of the sealing elements of the fuel cell single cell structure; the second purpose is to provide a glue-injected mold; the third purpose is to provide an integrated glue-injected sealed fuel cell single cell structure manufacturing process; the fourth purpose is to provide an integrated glue-injected sealed fuel cell single cell structure battery stack.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] An integrated glue-injection sealed fuel cell single cell structure, comprising: an anode plate, a membrane electrode, and a cathode plate, wherein the anode plate, the membrane electrode, and the cathode plate are stacked in sequence along the same direction to form a single cell frame structure;

[0009] The single cell frame structure is provided with a plurality of glue injection holes, through which sealant is injected into the single cell frame structure to form a sealing structure, and the sealing structure is used to seal and connect the single cell frame structure to form the integrated glue injection sealed fuel cell single cell structure.

[0010] According to the above technical means, a sealing structure is formed by injecting sealant into the injection holes provided on the single cell frame structure, and at the same time, the single cell frame structure is sealed and connected to form an integrated fuel cell single cell structure. The present application seals and connects the anode plate, membrane electrode and cathode plate through one injection, thereby having the beneficial effect of ensuring the sealing performance of the single cell structure while avoiding affecting the reaction efficiency of the single cell structure; the integrated injection-sealed fuel cell single cell structure proposed in the present application effectively improves the sealing performance of the single cell and the production efficiency of the single cell, simplifies the single cell assembly process, and reduces the production cost of the fuel cell single cell, thereby having the beneficial effect of being able to meet the mass production needs of the single cell; and the one-piece molded sealing structure effectively reduces the ratio of the sealing area to the plate area, thereby increasing the effective reaction zone area ratio of the single cell, and thereby improving the volume power density of the fuel cell.

[0011] Optionally, the sealing structure includes an anode sealing ring, a cathode sealing ring, a water cavity sealing ring and a sealing connecting column that are integrally injection-molded. The anode sealing ring is sealingly connected between the anode plate and the membrane electrode, the cathode sealing ring is sealingly connected between the cathode plate and the membrane electrode, and the water cavity sealing ring is connected to the side of the cathode plate away from the membrane electrode. A sealing connecting column is formed at the injection hole, and the sealing connecting column connects the anode sealing ring, the cathode sealing ring and the water cavity sealing ring into one.

[0012] According to the above technical means, the anode sealing ring, cathode sealing ring, water cavity sealing ring and sealing connecting column are formed by injecting sealant into the injection hole of the single cell frame structure at one time. The sealing connecting column is formed in the injection hole of the single cell frame structure, and the anode sealing ring, cathode sealing ring and water cavity sealing ring are connected into one through the sealing connecting column.

[0013] Optionally, the anode plate is provided with an anode plate first gas flow channel area, the membrane electrode is provided with a membrane electrode reaction area corresponding to the anode plate first gas flow channel area, the cathode plate is provided with a cathode plate second gas flow channel area on a side facing the membrane electrode corresponding to the membrane electrode reaction area, and the cathode plate is provided with a cathode plate cooling water flow channel area on a side facing away from the membrane electrode, the anode plate first gas flow channel area and the membrane electrode reaction area form a first reaction chamber of the single cell frame structure, and the cathode plate second gas flow channel area and the membrane electrode reaction area form a second reaction chamber of the single cell frame structure;

[0014] The single cell frame structure is provided with a first gas common channel, a cooling water common channel and a second gas common channel. The membrane electrode is provided with a first gas channel boss and a second gas channel boss around the first gas common channel and the second gas common channel respectively. A first gas duct is provided on the first gas channel boss of the membrane electrode and a second gas duct is provided on the second gas channel boss of the membrane electrode. The first reaction chamber is connected to the first gas common channel through the first gas duct, and the second reaction chamber is connected to the second gas common channel through the second gas duct. The cathode plate cooling water flow channel area is connected to the cooling water common channel.

[0015] According to the above technical means, the present application seals and connects the anode plate, membrane electrode and cathode plate through one-time glue injection, and simultaneously realizes the sealing of the first reaction chamber, the second reaction chamber and the cooling water flow channel area of ​​the cathode plate, thereby avoiding the problem of mutual leakage of hydrogen, air or cooling water. By setting the hydrogen channel boss and the air channel boss on the membrane electrode, the sealant can be prevented from forming a seal at the first gas common channel and the second gas common channel on the membrane electrode during the process of injecting the sealant, thereby avoiding blockage of the first gas duct and the second gas duct.

[0016] Optionally, the mold electrode also includes a membrane electrode frame, on which are provided a membrane electrode first gas inlet main channel, a membrane electrode cooling water inlet main channel, a membrane electrode second gas inlet main channel, a membrane electrode first gas outlet main channel, a membrane electrode cooling water outlet main channel and a membrane electrode second gas outlet main channel. The membrane electrode frame is also provided with a membrane electrode sealing area, on which are distributed a plurality of membrane electrode glue injection connection holes.

[0017] According to the above technical means, the membrane electrode glue injection connection hole set on the membrane electrode frame is connected with the glue injection hole set on the single cell frame structure, so that the sealant can form a sealing ring on both sides of the membrane electrode along the thickness direction. The sealing area set on the membrane electrode frame is used to cooperate with the anode plate and the cathode plate to form an anode sealing ring and a cathode sealing ring.

[0018] Optionally, the mold electrode includes a membrane electrode anode side and a membrane electrode cathode side along the thickness direction; the membrane electrode anode side includes a membrane electrode first gas inlet channel boss and a membrane electrode first gas outlet channel boss, the membrane electrode first gas inlet channel boss is arranged along the circumference of the membrane electrode first gas inlet main channel, the membrane electrode first gas outlet channel boss is arranged along the circumference of the membrane electrode first gas outlet main channel, the membrane electrode first gas inlet channel boss is provided with a membrane electrode first gas inlet duct at one end close to the membrane electrode reaction zone, the membrane electrode first gas outlet channel boss is close to the membrane electrode reaction zone A membrane electrode first gas outlet duct is provided at one end; the membrane electrode cathode side includes a membrane electrode second gas inlet channel boss and a membrane electrode second gas outlet channel boss, the membrane electrode second gas inlet channel boss is arranged along the circumference of the membrane electrode second gas inlet main channel, the membrane electrode second gas outlet channel boss is arranged along the circumference of the membrane electrode second gas outlet main channel, the membrane electrode second gas inlet channel boss is provided with a membrane electrode second gas inlet duct at one end close to the membrane electrode reaction zone, and the membrane electrode second gas outlet channel boss is provided with a membrane electrode second gas outlet duct at one end close to the membrane electrode reaction zone.

[0019] According to the above technical means, the membrane electrode first gas inlet channel boss and the membrane electrode first gas outlet channel boss set on the anode side of the membrane electrode can effectively avoid the blockage of the membrane electrode first gas inlet main channel and the membrane electrode first gas outlet main channel during the formation of the anode sealing ring on the anode side sealing area of ​​the membrane electrode, and the anode side of the membrane electrode is connected to the first reaction chamber through the membrane electrode first gas inlet duct and the membrane electrode first gas outlet duct; the membrane electrode second gas inlet channel boss and the membrane electrode second gas outlet channel boss set on the cathode side of the membrane electrode can effectively avoid the blockage of the membrane electrode second gas inlet main channel and the membrane electrode second gas outlet main channel during the formation of the cathode sealing ring on the cathode side of the membrane electrode, and the cathode side of the membrane electrode is connected to the second reaction chamber through the membrane electrode second gas inlet duct and the membrane electrode second gas outlet duct.

[0020] Optionally, the cathode plate also includes a cathode plate frame, on which are provided a first gas inlet channel for the cathode plate, a cooling water inlet channel for the cathode plate, a second gas inlet channel for the cathode plate, a first gas outlet channel for the cathode plate, a cooling water outlet channel for the cathode plate and a second gas outlet channel for the cathode plate; a cathode plate glue injection sealing groove is provided on the cathode plate frame corresponding to the membrane electrode sealing area; and a cathode plate glue injection connection hole is provided in the cathode plate glue injection sealing groove corresponding to the membrane electrode glue injection connection hole.

[0021] According to the above technical means, the cathode plate is connected to the glue injection hole set on the single cell frame structure through the cathode plate glue injection connection hole, so that the sealant can smoothly enter the cathode plate glue injection sealing groove, thereby forming a cathode sealing ring between the cathode plate glue injection sealing groove and the membrane electrode cathode side glue injection sealing area.

[0022] Optionally, a cathode plate first flow channel extension area and a cathode plate second flow channel extension area are provided on the cathode plate frame, one end of the cathode plate first flow channel extension area is connected to the membrane electrode second gas inlet duct, and the other end is connected to the cathode plate second gas flow channel area; one end of the cathode plate second flow channel extension area is connected to the membrane electrode second gas outlet duct, and the other end is connected to the cathode plate second gas flow channel area; a cathode plate glue injection overflow groove is also provided between the cathode plate second gas flow channel area and the cathode plate glue injection sealing groove.

[0023] According to the above technical means, the cathode plate first flow channel extension area and the cathode plate second flow channel extension area set on the cathode plate are connected with the membrane electrode second gas inlet duct and the membrane electrode second gas outlet duct respectively, so that the membrane electrode second gas inlet main channel is connected with the membrane electrode second gas outlet main channel. At the same time, the setting of the cathode plate first flow channel extension area and the cathode plate second flow channel extension area can effectively improve the reaction uniformity of the second reaction chamber, thereby improving the reaction efficiency of the cathode reaction chamber of the fuel cell single cell structure; the cathode plate glue overflow groove set between the cathode plate second gas flow channel area and the cathode plate glue injection sealing groove avoids the hidden danger of glue overflow during glue injection causing pollution to the membrane electrode cathode side reaction area.

[0024] Optionally, the anode plate further includes an anode plate frame, on which are provided an anode plate first gas inlet main channel, an anode plate cooling water inlet main channel, an anode plate second gas inlet main channel, an anode plate first gas outlet main channel, an anode plate cooling water outlet main channel and an anode plate second gas outlet main channel; an anode plate glue injection sealing groove is provided on the anode plate frame corresponding to the membrane electrode sealing area, and a plurality of anode plate glue injection exhaust holes are provided in the anode plate glue injection sealing groove.

[0025] According to the above technical means, an anode sealing ring is formed between the anode plate glue injection sealing groove provided on the anode plate and the membrane electrode sealing area on the anode side of the membrane electrode, and the anode plate glue injection exhaust hole provided in the anode plate glue injection sealing groove can quickly discharge the gas in the single cell frame structure during the process of injecting sealant into the single cell frame structure, thereby balancing the internal air pressure and avoiding clogging of the sealant in the glue injection hole.

[0026] Optionally, the anode plate frame is provided with an anode plate first flow channel extension area and an anode plate second flow channel extension area, one end of the anode plate first flow channel extension area is connected to the membrane electrode first gas inlet duct, and the other end is connected to the anode plate first gas flow channel area, one end of the anode plate second flow channel extension area is connected to the membrane electrode first gas outlet duct, and the other end is connected to the anode plate first gas flow channel area; an anode plate glue injection overflow groove is also provided between the anode plate first gas flow channel area and the anode plate glue injection sealing groove.

[0027] According to the above technical means, the anode plate first flow channel extension area and the anode plate second flow channel extension area provided on the anode plate are connected to the membrane electrode first gas inlet duct and the membrane electrode first gas outlet duct respectively, thereby connecting the membrane electrode first gas inlet main channel and the membrane electrode first gas outlet main channel. At the same time, the setting of the anode plate first flow channel extension area and the anode plate second flow channel extension area can effectively improve the reaction uniformity of the first reaction chamber, thereby improving the reaction efficiency of the anode reaction chamber of the fuel cell single cell structure; the anode plate glue overflow groove provided between the anode plate first gas flow channel area and the anode plate glue injection sealing groove avoids the hidden danger of glue overflow during glue injection causing pollution to the membrane electrode anode side reaction area.

[0028] Optionally, the anode plate and the anode side of the membrane electrode are sealed and connected via the anode sealing ring, and the anode sealing ring is used to seal the first reaction chamber; the cathode plate and the cathode side of the membrane electrode are sealed and connected via the cathode sealing ring, and the cathode sealing ring is used to seal the second reaction chamber.

[0029] According to the above technical means, the first reaction chamber is sealed by the anode sealing ring to prevent the first gas and the second gas or the cooling water in the first reaction chamber from leaking into each other, and the second reaction chamber is sealed by the cathode sealing ring to prevent the second gas and the first gas or the cooling water in the second reaction chamber from leaking into each other. At the same time, the anode sealing ring and the cathode sealing ring are used to seal and connect the anode plate, the membrane electrode, and the cathode plate to form an integrated single cell structure.

[0030] A glue injection mold is applied to the integrated glue injection and sealed fuel cell single cell structure, the glue injection mold comprising: a glue injection upper mold, which has a plurality of mold glue injection channels coaxially arranged with the glue injection holes along the thickness direction, a water cavity sealing glue injection groove for glue injection molding of the water cavity sealing ring is provided on the molding surface of the glue injection upper mold, and a glue injection upper mold cooling groove is provided in the middle of the glue injection upper mold; a glue injection lower mold, which has a plurality of mold glue discharge channels coaxially arranged with the mold glue injection channels along the thickness direction, a glue injection lower mold cooling groove is provided in the middle of the glue injection lower mold, and the glue injection lower mold is provided with a glue sealing molding groove corresponding to the water cavity sealing glue injection groove; wherein, the mold glue injection channel and the mold glue discharge channel cooperate to form a glue injection flow channel of the glue injection mold, the water cavity sealing glue injection groove and the glue sealing molding groove of the glue injection lower mold cooperate to form a glue sealing molding area of ​​the glue injection mold, and the glue injection upper mold cooling groove and the glue injection lower mold cooling groove cooperate to form a mold hollow cooling area of ​​the glue injection mold.

[0031] According to the above technical means, a water cavity sealing glue injection groove is provided on the glue injection upper mold, and a water cavity sealing ring is formed between the side of the cathode plate away from the membrane electrode and the water cavity glue injection sealing groove during the process of injecting sealant into the mold glue injection flow channel, and the excess sealant in the single cell frame structure is discharged through the mold glue discharge channel provided on the mold glue injection lower mold; by forming a sealing structure of an integrated fuel cell single cell structure in the glue sealing molding area provided on the glue injection mold, the middle part of the single cell structure is located in the hollow cooling area of ​​the glue injection mold, and the middle part of the single cell structure can be effectively isolated from the influence of temperature changes during the heating and curing process of the sealing structure in the glue sealing molding area, thereby avoiding damage to the reaction zone in the middle of the single cell structure due to excessively high heating temperature, and reducing the risk of warping of the single cell structure.

[0032] Optionally, the upper glue injection mold is provided with a glue sealing groove corresponding to the cathode plate glue injection overflow groove, and the glue sealing groove of the upper glue injection mold matches the shape of the cathode plate glue injection overflow groove; the lower glue injection mold is provided with a glue sealing groove corresponding to the anode plate glue injection overflow groove, and the glue sealing groove of the lower glue injection mold matches the shape of the anode plate glue injection overflow groove; the glue sealing groove of the upper glue injection mold and the glue sealing groove of the lower glue injection mold cooperate to form the glue sealing area of ​​the glue injection mold.

[0033] According to the above technical means, the cathode plate glue injection overflow groove and the anode plate glue injection overflow groove are located in the glue sealing area of ​​the glue injection mold during the glue injection process, thereby avoiding the glue overflow problem inside the single battery structure during the glue injection process of the glue injection mold.

[0034] A manufacturing process for an integrated glue-injection sealed fuel cell single cell structure, wherein the integrated glue-injection sealed single cell structure is formed by integral glue injection molding using a glue injection mold, and the process comprises:

[0035] The anode plate, the membrane electrode and the cathode plate are stacked in sequence on the molding surface of the lower injection mold;

[0036] Clamping the upper injection mold and the lower injection mold;

[0037] Using a vacuum pump to evacuate the air in the injection mold through the mold glue outlet channel;

[0038] Injecting sealant into the injection mold through the mold injection channel using a low-pressure injection process to form the sealing structure in the single cell structure;

[0039] The mold sealing molding area is heated to solidify the sealing structure.

[0040] Based on the above-mentioned technical means, the present application utilizes a low-pressure injection process to uniformly inject sealant into the single-cell frame structure, filling the gaps between the structures and effectively achieving sealing. The low-pressure injection process can provide a lower injection pressure, preventing damage to the cell structure caused by excessive injection pressure. The low-pressure injection process can also reduce or eliminate bubbles generated during the injection process, improving the quality of the injection seal. The integrated injection-sealed fuel cell single-cell structure manufacturing process proposed in this application can complete the production of fuel cell single-cell structures in a short period of time, greatly improving production efficiency while also meeting the needs of mass production.

[0041] An integrated glue-injected sealed fuel cell single cell structure battery stack, the battery stack includes a plurality of the integrated glue-injected sealed fuel cell single cell structures stacked and assembled in sequence, the side of the anode plate in the single cell structure facing away from the membrane electrode and the side of the cathode plate in the adjacent single cell structure facing away from the membrane electrode cooperate to form a cooling water cavity, and the water cavity sealing ring is used to seal the cooling water cavity.

[0042] The beneficial effects of the present invention are as follows: a sealing structure is formed by injecting sealant into the injection holes provided on the single-cell frame structure, and the single-cell frame structure is sealed and connected to form an integrated fuel cell single-cell structure. The present application seals and connects the anode plate, membrane electrode and cathode plate at the same time by injecting sealant at one time; the integrated injection-sealed fuel cell single-cell structure proposed in the present application effectively improves the sealing performance of the single cell and the production efficiency of the single cell, simplifies the single cell assembly process, and reduces the production cost of the fuel cell single cell, thereby having the beneficial effect of being able to meet the mass production needs of single cells; and the one-piece formed sealing structure effectively reduces the ratio of the sealing structure to the plate area, thereby increasing the effective reaction area ratio of the single cell structure, and thereby improving the volume-to-power density of the fuel cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1Schematic diagram of a single cell structure according to an embodiment of the present invention;

[0044] Figure 2 This is an exploded schematic diagram of a single cell structure according to an embodiment of the present invention;

[0045] Figure 3 This is an exploded schematic diagram of a single-cell frame structure according to an embodiment of the present invention;

[0046] Figure 4 for Figure 2 Schematic diagram of the structure of the cathode side of the membrane electrode;

[0047] Figure 5 for Figure 2 Schematic diagram of the structure of the anode side of the membrane electrode;

[0048] Figure 6 for Figure 2 Schematic diagram of the structure of the cathode plate;

[0049] Figure 7 for Figure 2 Schematic diagram of the structure of the anode plate;

[0050] Figure 8 for Figure 2 Schematic diagram of the structure of the anode sealing ring;

[0051] Figure 9 for Figure 2 Schematic diagram of the structure of the cathode sealing ring;

[0052] Figure 10 for Figure 2 Schematic diagram of the structure of the water cavity sealing ring;

[0053] Figure 11 A schematic cross-sectional view of a single cell structure shown in an embodiment of the present application;

[0054] Figure 12 This is a cross-sectional diagram of the air inlet and outlet ducts of a single cell structure;

[0055] Figure 13 This is a schematic diagram of the cross section of the hydrogen inlet and outlet ducts of a single cell structure;

[0056] Figure 14 This is a cross-sectional schematic diagram of the glue injection process of the glue injection mold and the single cell frame structure shown in an embodiment of the present application;

[0057] Figure 15 This is a flow chart of the manufacturing process of the integrated glue injection sealed fuel cell single cell structure shown in the embodiment of the present application;

[0058] Figure 16 This is a schematic diagram of the battery stack structure shown in an embodiment of the present application.

[0059] Part Number Description

[0060] Single cell frame structure 1, first reaction chamber 101, second reaction chamber 102, first gas common channel 103, cooling water common channel 104, second gas common channel 105;

[0061] Anode plate 2, anode plate first gas flow channel area 201, anode plate frame 202, anode plate first gas inlet main channel 202a, anode plate cooling water inlet main channel 202b, anode plate second gas inlet main channel 202c, anode plate first gas outlet main channel 202d, anode plate cooling water outlet main channel 202e, anode plate second gas outlet main channel 202f, anode plate glue injection sealing groove 203, anode plate glue injection exhaust hole 203a, anode plate first flow channel extension area 204, anode plate second flow channel extension area 205, anode plate glue injection overflow groove 206;

[0062] Membrane electrode 3, membrane electrode reaction area 301, membrane electrode first gas channel boss 302, membrane electrode second gas channel boss 303, first gas duct 304, second gas duct 305, membrane electrode frame 306, membrane electrode first gas inlet main channel 306a, membrane electrode cooling water inlet main channel 306b, membrane electrode second gas inlet main channel 306c, membrane electrode first gas outlet main channel 306d, membrane electrode cooling water outlet main channel 306e, membrane electrode second gas outlet main channel 306f, membrane electrode The anode sealing area 306g, the membrane electrode glue injection connection hole 306h, the membrane electrode anode side 307, the membrane electrode first gas inlet channel boss 307a, the membrane electrode first gas outlet channel boss 307b, the membrane electrode first gas inlet duct 307c, the membrane electrode first gas outlet duct 307d, the membrane electrode cathode side 308, the membrane electrode second gas inlet channel boss 308a, the membrane electrode second gas outlet channel boss 308b, the membrane electrode second gas inlet duct 308c, and the membrane electrode second gas outlet duct 308d;

[0063] Cathode plate 4, cathode plate second gas flow channel area 401, cooling water flow channel area 402, cathode plate frame 403, cathode plate first gas inlet main channel 403a, cathode plate cooling water inlet main channel 403b, cathode plate second gas inlet main channel 403c, cathode plate first gas outlet main channel 403d, cathode plate cooling water outlet main channel 403e, cathode plate second gas outlet main channel 403f, cathode plate glue injection sealing groove 404, cathode plate glue injection connection hole 404a, cathode plate first flow channel extension area 405, cathode plate second flow channel extension area 406, cathode plate glue injection overflow groove 407;

[0064] Sealing structure 5, anode sealing ring 501, anode sealing ring periphery seal 501a, anode sealing ring hydrogen inlet main channel seal 501b, anode sealing ring cooling water inlet main channel seal 501c, anode sealing ring air inlet main channel seal 501d, anode sealing ring hydrogen outlet main channel seal 501e, anode sealing ring cooling water outlet main channel seal 501f, anode sealing ring air outlet main channel seal 501g, cathode sealing ring 502, cathode sealing ring periphery seal 502a, cathode sealing ring hydrogen inlet main channel seal 502b, cathode sealing ring cooling water inlet main channel seal 502c, cathode sealing ring air inlet Main channel seal 502d, cathode sealing ring hydrogen out main channel seal 502e, cathode sealing ring cooling water out main channel seal 502f, cathode sealing ring empty main channel seal 502g, water chamber sealing ring 503, water chamber sealing ring circumferential seal 503a, water chamber sealing ring hydrogen in main channel seal 503b, water chamber sealing ring cooling water in main channel seal 503c, water chamber sealing ring empty in main channel seal 503d, water chamber sealing ring hydrogen out main channel seal 503e, water chamber sealing ring cooling water out main channel seal 503f, water chamber sealing ring empty main channel seal 503g, sealed connecting column 504;

[0065] Glue injection mold 6, glue injection upper mold 601, mold glue injection channel 601a, water cavity sealing glue injection groove 601b, glue injection upper mold cooling groove 601c, glue injection upper mold sealing groove 601d, glue injection lower mold 602, mold glue outlet channel 602a, glue injection lower mold cooling groove 602b, glue injection lower mold sealing molding groove 602c, glue injection lower mold sealing groove 602d, glue injection flow channel 603, sealing molding area 604, mold hollow cooling area 605, glue injection mold sealing area 606;

[0066] Single cell structure 7;

[0067] Battery stack 8, cooling water chamber 801. DETAILED DESCRIPTION

[0068] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention.

[0069] See also Figures 1 to 16It should be noted that the diagrams provided in this embodiment are only schematic illustrations of the basic concept of the present invention. Therefore, the diagrams only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. The type, quantity and proportion of each component in actual implementation can be changed at will, and the component layout type may also be more complex. The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read. They are not used to limit the limiting conditions for the implementation of the present invention and therefore have no technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be considered as the scope of the implementation of the present invention without substantially changing the technical content.

[0070] Before describing the embodiments of the present invention in detail, we will first describe its application environment. The technology of this invention is primarily applied in the field of automotive fuel cell technology. This invention addresses the existing problems of low sealing performance, low production and assembly efficiency, high production costs, and an inability to meet mass production requirements for the sealing components of fuel cell single cell structures.

[0071] Please combine Figures 1 to 13 As shown, the present application proposes an integrated glue-injected sealed fuel cell single cell structure 7, comprising:

[0072] In an exemplary embodiment of the present application, the anode plate 2, the membrane electrode 3 and the cathode plate 4 are stacked in sequence along the same direction to form a single cell frame structure 1; a plurality of glue injection holes are opened on the single cell frame structure 1, and the single cell frame structure 1 is injected with sealant through the glue injection holes to form a sealing structure 5, and the sealing structure 5 is used to seal the single cell frame structure 1 to form an integrated glue injection sealed fuel cell single cell structure 7.

[0073] In this embodiment, a single-cell frame structure 1 is formed by simply stacking an anode plate 2, a membrane electrode 3, and a cathode plate 4 in sequence. Sealant is injected into the glue injection holes provided on the single-cell frame structure 1, thereby connecting the anode plate 2, the membrane electrode 3, and the cathode plate 4 together through the adhesive properties of the sealant itself. At the same time, an anode sealing ring 501, a cathode sealing ring 502, and a water cavity sealing ring 503 are formed within the single-cell frame structure 1. The sealing structure 5 is connected together via a sealing connecting column 504, thereby forming an integrated glue-injected sealed fuel cell single-cell structure 7. The integrated glue-injected sealed fuel cell single-cell structure 7 proposed in this application effectively improves the sealing performance and single-cell production efficiency of the single-cell structure 7, simplifies the single-cell assembly process, and reduces the production cost of the fuel cell single-cell structure 7, thereby having the beneficial effect of meeting the needs of single-cell mass production. Furthermore, the integrally formed sealing structure 5 effectively reduces the ratio of the sealing area to the plate area, thereby increasing the effective reaction area ratio of the single cell, thereby improving the volume-to-power density of the fuel cell.

[0074] In an exemplary embodiment of the present application, the sealing structure 5 includes an anode sealing ring 501, a cathode sealing ring 502, a water cavity sealing ring 503 and a sealing connecting column 504 that are integrally injected with glue. The anode sealing ring 501 is sealed and connected between the anode plate 2 and the membrane electrode 3. The cathode sealing ring 502 is sealed and connected between the cathode plate 4 and the membrane electrode 3. The water cavity sealing ring 503 is connected to the side of the cathode plate 4 away from the membrane electrode 3. A sealing connecting column 504 is formed at the glue injection hole. The sealing connecting column 504 connects the anode sealing ring 501, the cathode sealing ring 502 and the water cavity sealing ring 503 into one.

[0075] In this embodiment, the anode sealing ring 501, the cathode sealing ring 502, the water cavity sealing ring 503 and the sealing connecting column 504 are formed by injecting sealant into the injection hole of the single cell frame structure 1 at one time. The sealing connecting column 504 is formed in the injection hole of the single cell frame structure 1, and the anode sealing ring 501, the cathode sealing ring 502 and the water cavity sealing ring 503 are connected into one through the sealing connecting column 504.

[0076] In an exemplary embodiment of the present application, the anode plate 2 is provided with an anode plate first gas flow channel area 201, the membrane electrode 3 is provided with a membrane electrode reaction area 301 corresponding to the anode plate first gas flow channel area 201, the cathode plate 4 is provided with a cathode plate second gas flow channel area 401 on the side facing the membrane electrode 3 corresponding to the membrane electrode reaction area 301, and the cathode plate 4 is provided with a cathode plate cooling water flow channel area 402 on the side away from the membrane electrode 3. The anode plate first gas flow channel area 201 and the membrane electrode reaction area 301 form the first reaction chamber 101 of the single cell frame structure 1, and the cathode plate second gas flow channel area 401 and the membrane electrode reaction area 301 form the second reaction chamber 102 of the single cell frame structure 1; the single cell frame structure 1 is provided with a first gas common Channel 103, cooling water common channel 104 and second gas common channel 105, the membrane electrode 3 is respectively provided with a membrane electrode first gas channel boss 302 and a membrane electrode second gas channel boss 303 around the first gas common channel 103 and the second gas common channel 105, a first gas duct 304 is provided on the membrane electrode first gas channel boss 302, and a second gas duct 305 is provided on the membrane electrode second gas channel boss 303, the first reaction chamber 101 is connected to the first gas common channel 103 through the first gas duct 304, the second reaction chamber 102 is connected to the second gas common channel 105 through the second gas duct 305, and the cooling water flow channel area 402 of the cathode plate is connected to the cooling water common channel 104.

[0077] In this embodiment, the present application seals the anode plate 2, the membrane electrode 3 and the cathode plate 4 by injecting glue once, and at the same time realizes the sealing of the first reaction chamber 101, the second reaction chamber 102 and the cooling water flow channel area 402 of the cathode plate, thereby avoiding the problem of hydrogen, air or cooling water leaking into each other. By setting the hydrogen channel boss and the air channel boss on the membrane electrode 3, the sealant can be prevented from forming a seal at the first gas common channel 103 and the second gas common channel 105 on the membrane electrode 3 during the process of injecting the sealant, thereby avoiding clogging the first gas duct 304 and the second gas duct 305, thereby ensuring the sealing performance of the single cell structure 7 while avoiding affecting the reaction efficiency of the single cell structure 7. The first reaction chamber 101 provides a reaction chamber for hydrogen and the membrane electrode reaction zone 301, and the second reaction chamber 102 provides a reaction chamber for air and the membrane electrode reaction zone 301. The first gas flow channel area 201 of the anode plate and the second gas flow channel area 401 of the cathode plate both adopt a concave-convex structure design. The concave surface of the first gas flow channel area 201 of the anode plate facing the membrane electrode 3 provides a hydrogen flow channel for the single cell structure 7, and the concave surface of the second gas flow channel area 401 of the cathode plate facing the membrane electrode 3 provides an air flow channel for the single cell structure 7. The concave surfaces of the anode plate 2 and the cathode plate 4 on the side away from the membrane electrode 3 both provide cooling water flow channels for the single cell structure 7.

[0078] In an exemplary embodiment of the present application, the mold electrode also includes a membrane electrode frame 306, on which are provided a membrane electrode first gas inlet main channel 306a, a membrane electrode cooling water inlet main channel 306b, a membrane electrode second gas inlet main channel 306c, a membrane electrode first gas outlet main channel 306d, a membrane electrode cooling water outlet main channel 306e and a membrane electrode second gas outlet main channel 306f. The membrane electrode frame 306 is also provided with a membrane electrode sealing area 306g, on which a plurality of membrane electrode glue injection connection holes 306h are distributed.

[0079] In this embodiment, the membrane electrode 3 includes a membrane electrode reaction zone 301 arranged in the middle of the membrane electrode 3 and a membrane electrode frame 306 arranged around the membrane electrode reaction zone 301. The membrane electrode frame 306 is used to support the membrane electrode reaction zone 301. The hydrogen inlet main channel and the hydrogen outlet main channel are symmetrical about the center of the membrane electrode 3. The membrane electrode cooling water inlet main channel 306b and the membrane electrode cooling water outlet main channel 306e are symmetrical about the center of the membrane electrode 3. The membrane electrode second gas inlet main channel 306c and the membrane electrode second gas outlet main channel The channels 306f are symmetrical about the center of the membrane electrode 3, and the membrane electrode first gas inlet main channel 306a, the membrane electrode cooling water inlet main channel 306b, the membrane electrode second gas inlet main channel 306c and the membrane electrode first gas outlet main channel 306d, the membrane electrode cooling water outlet main channel 306e, and the membrane electrode second gas outlet main channel 306f are respectively arranged on the left and right sides of the membrane electrode reaction area 301, and the membrane electrode first gas inlet main channel 306a, the membrane electrode cooling water inlet main channel 306b, the membrane electrode second gas inlet main channel 306c are respectively arranged on the left and right sides of the membrane electrode reaction area 301. The main channel 306c is arranged along the short axis direction of the membrane electrode frame 306, and the membrane electrode first gas outlet main channel 306d, the membrane electrode cooling water outlet main channel 306e, and the membrane electrode second gas outlet main channel 306f are arranged along the short axis direction of the membrane electrode frame 306, and the membrane electrode first gas outlet main channel 306d, the membrane electrode cooling water outlet main channel 306e, and the membrane electrode second gas outlet main channel 306f are aligned with the membrane electrode first gas inlet main channel 306a, the membrane electrode cooling water inlet main channel 306b, and the membrane electrode. The arrangement directions of the second gas inlet main channel 306c are opposite. The above arrangement is beneficial to the reaction uniformity of the single cell structure 7. The membrane electrode glue injection connection hole 306h set on the membrane electrode sealing area 306g facilitates the flow of sealant from the membrane electrode cathode side 308 to the membrane electrode anode side 307. The membrane electrode sealing area 306g includes a membrane electrode anode sealing area and a membrane electrode cathode sealing area. The sealant forms an anode sealing ring 501 in the membrane electrode anode sealing area and forms a cathode sealing ring 502 on the membrane electrode cathode sealing area.

[0080] In an exemplary embodiment of the present application, the mold electrode includes a membrane electrode anode side 307 and a membrane electrode cathode side 308 along the thickness direction; the membrane electrode anode side 307 includes a membrane electrode first gas inlet channel boss 307a and a membrane electrode first gas outlet channel boss 307b, the membrane electrode first gas inlet channel boss 307a is arranged along the circumference of the membrane electrode first gas inlet main channel 306a, the membrane electrode first gas outlet channel boss 307b is arranged along the circumference of the membrane electrode first gas outlet main channel 306d, the membrane electrode first gas inlet channel boss 307a is provided with a membrane electrode first gas inlet duct 307c at one end close to the membrane electrode reaction zone 301, and the membrane electrode first gas outlet channel boss 307b is provided close to the membrane electrode reaction zone 306d. A membrane electrode first gas outlet duct 307d is provided at one end of 01; the membrane electrode cathode side 308 includes a membrane electrode second gas inlet channel boss 308a and a membrane electrode second gas outlet channel boss 308b, the membrane electrode second gas inlet channel boss 308a is arranged along the circumference of the membrane electrode second gas inlet main channel 306c, and the membrane electrode second gas outlet channel boss 308b is arranged along the circumference of the membrane electrode second gas outlet main channel 306f, the membrane electrode second gas inlet channel boss 308a is provided with a membrane electrode second gas inlet duct 308c at one end close to the membrane electrode reaction zone 301, and the membrane electrode second gas outlet channel boss 308b is provided with a membrane electrode second gas outlet duct 308d at one end close to the membrane electrode reaction zone 301.

[0081] In this embodiment, the membrane electrode first gas channel boss 302 includes a membrane electrode first gas inlet channel boss 307a and a membrane electrode first gas outlet channel boss 307b arranged on the membrane electrode anode side 307, and the first gas duct 304 includes a membrane electrode first gas inlet duct 307c and a membrane electrode first gas outlet duct 307d. The membrane electrode first gas inlet channel boss 307a is provided with a plurality of membrane electrode first gas inlet ducts 307c, and the plurality of membrane electrode first gas inlet ducts 307c are evenly arranged along the short axis direction of the membrane electrode frame 306. The membrane electrode first gas outlet channel boss 307b is provided with a plurality of membrane electrode first gas outlet ducts 307d, and the plurality of membrane electrode first gas outlet ducts 307d are evenly arranged along the short axis direction of the membrane electrode frame 306. The membrane electrode frame 306 is a rectangular structure. The provision of the membrane electrode first gas inlet channel boss 307a and the membrane electrode first gas outlet channel boss 307b can improve the efficiency of hydrogen inflow and outflow, increase the surface area and contact area of ​​the hydrogen inflow and outflow channels, and improve the efficiency of hydrogen inflow and outflow, thereby improving the hydrogen supply and reaction efficiency of the fuel cell, and improving the performance and efficiency of the cell. The provision of the membrane electrode first gas inlet duct 307c and the membrane electrode first gas outlet duct 307d can control the flow path and distribution of hydrogen, providing a dedicated channel for hydrogen circulation within the first reaction chamber 101, preventing mixing of hydrogen with other reactants and ensuring the purity and quality of the hydrogen. At the same time, it can evenly distribute hydrogen throughout the first chamber, thereby improving the uniformity of the reaction and reducing the problem of localized reactions, thereby having the beneficial effect of improving the operating stability and efficiency of the first reaction chamber 101 within the single cell structure 7. The membrane electrode second gas channel boss 303 includes a membrane electrode second gas inlet channel boss 308a and a membrane electrode second gas outlet channel boss 308b arranged on the membrane electrode cathode side 308. The second gas duct 305 includes a membrane electrode second gas inlet duct 308c and a membrane electrode second gas outlet duct 308d. The membrane electrode second gas inlet channel boss 308a is provided with a plurality of membrane electrode second gas inlet ducts 308c, and the plurality of membrane electrode second gas inlet ducts 308c are evenly arranged along the short axis direction of the membrane electrode frame 306. The membrane electrode second gas outlet channel boss 308b is provided with a plurality of membrane electrode second gas outlet ducts 308d, and the plurality of membrane electrode second gas outlet ducts 308d are evenly arranged along the short axis direction of the membrane electrode frame 306. The arrangement of the membrane electrode second gas inlet channel boss 308a and the membrane electrode second gas outlet channel boss 308b can improve the air inlet and outlet efficiency, increase the surface area and contact area of ​​the air inlet and outlet channels, improve the air inlet and outlet efficiency, and thus improve the air supply and reaction efficiency of the fuel cell.The setting of the membrane electrode second gas inlet duct 308c and the membrane electrode second gas outlet duct 308d can control the flow path and distribution of the air, provide a special channel for the air circulation in the second reaction chamber 102, avoid the mixing of air and other reactants, and ensure the purity and quality of the air; at the same time, it can make the air evenly distributed in the second reaction chamber 102, thereby improving the uniformity and effect of the reaction, reducing the problem of local reaction, and thus having the beneficial effect of improving the working stability and working efficiency of the second reaction chamber 102 of the single cell structure 7.

[0082] In an exemplary embodiment of the present application, the cathode plate 4 also includes a cathode plate frame 403, on which are provided a cathode plate first gas inlet main channel 403a, a cathode plate cooling water inlet main channel 403b, a cathode plate second gas inlet main channel 403c, a cathode plate first gas outlet main channel 403d, a cathode plate cooling water outlet main channel 403e and a cathode plate second gas outlet main channel 403f, and a cathode plate glue injection sealing groove 404 is provided on the cathode plate frame 403 corresponding to the membrane electrode sealing area 306g, and a cathode plate glue injection connection hole 404a is provided in the cathode plate glue injection sealing groove 404 corresponding to the membrane electrode glue injection connection hole 306h.

[0083] In this embodiment, the cathode plate frame 403 is arranged around the cathode plate second gas flow channel area 401 to provide support for the cathode plate second gas flow channel area 401, and the cathode plate glue injection sealing groove 404 is used to cooperate with the membrane electrode sealing area 306g set on the cathode side 308 of the membrane electrode. During the glue injection process, the sealant forms a cathode sealing ring 502 between the cathode plate glue injection sealing groove 404 and the membrane electrode sealing area 306g set on the cathode side 308 of the membrane electrode, thereby achieving sealing performance while connecting the cathode plate 4 and the membrane electrode together. A cathode plate glue injection connection hole 404a is opened in the cathode plate glue injection sealing groove 404 corresponding to the membrane electrode glue injection connection hole 306h, so that the sealant can smoothly enter the single cell frame structure 1 and form a cathode sealing ring 502 between the cathode side 308 of the membrane electrode and the cathode plate 4.

[0084] In an exemplary embodiment of the present application, a cathode plate first flow channel extension area 405 and a cathode plate second flow channel extension area 406 are provided on the cathode plate frame 403, one end of the cathode plate first flow channel extension area 405 is connected to the membrane electrode second gas inlet duct 308c, and the other end is connected to the cathode plate second gas flow channel area 401; one end of the cathode plate second flow channel extension area 406 is connected to the membrane electrode second gas outlet duct 308d, and the other end is connected to the cathode plate second gas flow channel area 401; a cathode plate glue injection overflow groove 407 is also provided between the cathode plate second gas flow channel area 401 and the cathode plate glue injection sealing groove 404.

[0085] In this embodiment, the provision of the cathode plate first flow channel extension region 405 and the cathode plate second flow channel extension region 406 can effectively increase the contact area between the air in the second reaction chamber 102 and the membrane electrode reaction region 301, thereby promoting the transmission and reaction rate of air on the cathode side 308 of the membrane electrode; it can also allow air to flow evenly within the second reaction chamber 102, avoiding the problem of localized accumulation of air leading to uneven reaction. In addition, the inclined provision of the cathode plate first flow channel extension region 405 and the cathode plate second flow channel extension region 406 can effectively increase the effective surface area of ​​the cathode plate 4, thereby increasing the contact area between the air and the cathode plate 4, promoting the transmission and reaction rate of air on the cathode plate 4. By providing the cathode plate glue overflow groove 407 between the cathode plate second gas flow channel region 401 and the cathode plate glue injection sealing groove 404, the hidden danger of glue overflow during glue injection causing contamination of the reaction region on the cathode side 308 of the membrane electrode can be effectively avoided.

[0086] In an exemplary embodiment of the present application, the anode plate 2 also includes an anode plate frame 202, on which are provided an anode plate first gas inlet main channel 202a, an anode plate cooling water inlet main channel 202b, an anode plate second gas inlet main channel 202c, an anode plate first gas outlet main channel 202d, an anode plate cooling water outlet main channel 202e and an anode plate second gas outlet main channel 202f, and an anode plate glue injection sealing groove 203 is provided on the anode plate frame 202 corresponding to the membrane electrode sealing area 306g, and a plurality of anode plate glue injection exhaust holes 203a are provided in the anode plate glue injection sealing groove 203.

[0087] In this embodiment, the anode plate frame 202 is arranged around the first gas flow channel area 201 of the anode plate to support the first gas flow channel area 201 of the anode plate. The anode plate glue injection sealing groove 203 is used to inject glue between the membrane electrode sealing area 306g on the anode side 307 of the membrane electrode to form an anode sealing ring 501. At the same time, the anode plate 2 is connected to the membrane electrode 3 through the anode sealing ring 501. The anode plate glue injection sealing groove 203 is provided with an anode plate glue injection exhaust hole 203a. During the glue injection process, the air in the single cell frame structure 1 can be effectively discharged to balance the internal gas pressure, ensuring that the sealant can smoothly enter the single cell frame structure 1 to form a sealing structure 5. The number of the anode plate glue injection exhaust holes 203a is less than the number of the membrane electrode glue injection connection holes 306h and the cathode plate glue injection connection holes 404a, ensuring that the internal gas pressure can be balanced while effectively avoiding a large amount of sealant loss, thereby ensuring the uniformity of the glue injection inside the single cell frame structure 1. The anode plate glue injection exhaust holes 203 a are arranged in the middle of the upper, lower, left and right frames of the anode plate 2 .

[0088] In an exemplary embodiment of the present application, an anode plate first flow channel extension area 204 and an anode plate second flow channel extension area 205 are provided on the anode plate frame 202. One end of the anode plate first flow channel extension area 204 is connected to the membrane electrode first gas inlet duct 307c, and the other end is connected to the anode plate first gas flow channel area 201. One end of the anode plate second flow channel extension area 205 is connected to the membrane electrode first gas outlet duct 307d, and the other end is connected to the anode plate first gas flow channel area 201. An anode plate glue injection overflow groove 206 is also provided between the anode plate first gas flow channel area 201 and the anode plate glue injection sealing groove 203.

[0089] In this embodiment, the provision of the anode plate first flow channel extension region 204 and the anode plate second flow channel extension region 205 effectively increases the contact area between hydrogen and the membrane electrode reaction region 301 within the first reaction chamber 101, promoting the transmission and reaction rate of hydrogen on the anode side 307 of the membrane electrode; it also allows hydrogen to flow evenly within the first reaction chamber 101, avoiding the problem of localized accumulation of hydrogen leading to uneven reaction. Furthermore, the inclined provision of the anode plate first flow channel extension region 204 and the anode plate second flow channel extension region 205 effectively increases the effective surface area of ​​the anode plate 2, thereby increasing the contact area between hydrogen and the anode plate 2 and promoting the transmission and reaction rate of hydrogen on the anode plate 2. The provision of the anode plate glue overflow groove 206 between the anode plate first gas flow channel region 201 and the anode plate glue injection sealing groove 203 effectively avoids the potential risk of glue overflow during glue injection contaminating the reaction region on the anode side 307 of the membrane electrode.

[0090] In an exemplary embodiment of the present application, the anode plate 2 and the anode side 307 of the membrane electrode are sealed and connected by an anode sealing ring 501, and the anode sealing ring 501 is used to seal the first reaction chamber 101; the cathode plate 4 and the cathode side 308 of the membrane electrode are sealed and connected by a cathode sealing ring 502, and the cathode sealing ring 502 is used to seal the second reaction chamber 102; the water chamber sealing ring 503 is used to seal the cooling water flow channel area 402 of the cathode plate.

[0091] In this embodiment, a sealing structure 5 is formed by injecting sealant into the injection hole of the single cell frame structure 1 at one time, forming a cathode sealing ring 502 between the cathode side 308 of the membrane electrode and the cathode plate 4, and sealingly connecting the cathode side 308 of the membrane electrode to the cathode plate 4. An anode sealing ring 501 is formed between the anode side 307 of the membrane electrode and the anode plate 2, and sealingly connecting the anode side 307 of the membrane electrode to the anode plate 2. A water cavity sealing ring 503 is formed on the side of the cathode plate 4 away from the cathode side 308 of the membrane electrode. A sealing connection column 504 is formed in the injection hole of the single cell frame structure 1. The anode sealing ring 501, the cathode sealing ring 502, the water cavity sealing ring 503 and the sealing connection column 504 are integrally formed. By adopting this application, a sealing structure 5 can be formed in the single cell frame structure 1 by injecting sealant once, ensuring the sealing performance while completing the sealing connection of the single cell frame structure 1, reducing the production process, improving the production assembly efficiency, and reducing the production cost, thereby having the beneficial effect of meeting the needs of mass production.

[0092] In another exemplary embodiment, the anode sealing ring 501 includes an anode sealing ring circumferential seal 501a, an anode sealing ring hydrogen inlet main channel seal 501b, an anode sealing ring cooling water inlet main channel seal 501c, an anode sealing ring air inlet main channel seal 501d, an anode sealing ring hydrogen outlet main channel seal 501e, an anode sealing ring cooling water outlet main channel seal 501f, and an anode sealing ring air outlet main channel seal 501g; the cathode sealing ring 502 includes a cathode sealing ring circumferential seal 502a, a cathode sealing ring hydrogen inlet main channel seal 502b, and a cathode sealing ring cooling water inlet main channel seal 502c. , cathode sealing ring air inlet main channel seal 502d, cathode sealing ring hydrogen outlet main channel seal 502e, cathode sealing ring cooling water outlet main channel seal 502f, cathode sealing ring air outlet main channel seal 502g; water cavity sealing ring 503 includes water cavity sealing ring circumferential seal 503a, water cavity sealing ring hydrogen inlet main channel seal 503b, water cavity sealing ring cooling water inlet main channel seal 503c, water cavity sealing ring air inlet main channel seal 503d, water cavity sealing ring hydrogen outlet main channel seal 503e, water cavity sealing ring cooling water outlet main channel seal 503f, water cavity sealing ring air outlet main channel seal 503g.

[0093] See also Figure 14As shown, the present application also proposes a glue injection mold 6, which includes a glue injection upper mold 601 and a glue injection lower mold 602. The glue injection upper mold 601 is provided with a plurality of mold glue injection channels 601a, and the mold glue injection channels 601a are coaxially arranged with the glue injection holes. A water cavity sealing glue injection groove 601b for glue injection molding of the water cavity sealing ring 503 is provided on the molding surface of the glue injection upper mold 601, and a glue injection upper mold cooling groove 601c is provided in the middle of the glue injection upper mold 601; the glue injection lower mold 602 is provided with a plurality of mold glue outlet channels 602a along the thickness direction, and the mold glue outlet channels 602a are aligned with the mold glue injection channels 60 1a is coaxially arranged, and a lower injection mold cooling groove 602b is provided in the middle of the lower injection mold 602, and a lower injection mold sealing molding groove 602c is provided on the lower injection mold 602 corresponding to the water cavity sealing injection groove 601b; the mold injection channel 601a and the mold glue outlet channel 602a cooperate to form a glue injection flow channel 603 of the injection mold 6; the water cavity sealing injection groove 601b and the lower injection mold sealing molding groove 602c cooperate to form a sealing molding area 604 of the injection mold 6; the upper injection mold cooling groove 601c and the lower injection mold cooling groove 602b cooperate to form a mold hollow cooling area 605 of the injection mold 6.

[0094] In this embodiment, a water cavity sealing glue injection groove 601b is provided on the glue injection upper mold 601, and a water cavity sealing ring 503 is formed between the side of the cathode plate 4 away from the membrane electrode 3 and the water cavity glue injection sealing groove during the process of injecting sealant into the mold glue injection flow channel 603, and the excess sealant in the single cell frame structure 1 is discharged through the mold glue discharge channel 602a provided on the mold glue injection lower mold 602; by forming a sealing structure 5 of the integrated fuel cell single cell structure 7 in the glue molding area 604 provided on the glue injection mold 6, the middle part of the single cell structure 7 is located in the hollow cooling area of ​​the glue injection mold 6, and in the process of heating and curing the sealing structure 5 in the glue molding area 604, the middle part of the single cell structure 7 can be effectively isolated from contact with the heat source to avoid being affected by temperature changes, thereby avoiding damage to the reaction zone in the middle of the single cell structure 7 due to excessive heating temperature, and reducing the risk of warping of the single cell structure 7. The diameter of the glue inlet of the mold glue injection channel 601a is larger than the glue injection outlet of the glue injection channel, which facilitates the glue injection operation; the diameter of the glue outlet of the mold glue outlet channel 602a is smaller than the glue outlet, which facilitates the outflow of sealant.

[0095] In an exemplary embodiment of the present application, the upper glue injection mold 601 is provided with a glue injection upper mold sealing groove 601d corresponding to the cathode plate glue injection overflow groove 407, and the glue injection upper mold sealing groove 601d matches the shape of the cathode plate glue injection overflow groove 407; the lower glue injection mold 602 is provided with a glue injection lower mold sealing groove 602d corresponding to the anode plate glue injection overflow groove 206, and the glue injection lower mold sealing groove 602d matches the shape of the anode plate glue injection overflow groove 206; the glue injection upper mold sealing groove 601d and the glue injection lower mold sealing groove 602d cooperate to form a glue injection mold sealing area 606.

[0096] In this embodiment, the cathode plate glue injection overflow groove 407 and the anode plate glue injection overflow groove 206 are located in the glue injection mold sealing area 606 of the glue injection mold 6 during the glue injection process, thereby avoiding the glue overflow problem inside the single cell structure 7 during the glue injection process of the glue injection mold 6.

[0097] The present application also proposes a manufacturing process for an integrated glue-injection sealed fuel cell single cell structure 7 .

[0098] See also Figure 15 , Figure 15 This is a flow chart of the manufacturing process of the integrated glue injection sealed fuel cell single cell structure 7 shown in an embodiment of the present application.

[0099] like Figure 15 As shown, in an exemplary embodiment of the present application, the manufacturing process of the integrated glue injection sealed fuel cell single cell structure 7 includes at least steps S110 to S150, which are described in detail as follows:

[0100] Step S110 , stacking the anode plate 2 , the membrane electrode 3 and the cathode plate 4 in sequence on the molding surface of the lower injection mold 602 .

[0101] Step S120 , closing the glue injection upper mold 601 and the glue injection lower mold 602 .

[0102] In step S130 , a vacuum pump is used to exhaust the air in the injection mold 6 through the mold glue outlet channel 602 a .

[0103] In step S140 , a low-pressure injection process is used to inject sealant into the injection mold 6 through the mold injection channel 601 a to form a sealing structure 5 in the single cell structure 7 .

[0104] Step S150 , the mold sealing molding area 604 is heated to solidify the sealing structure 5 .

[0105] In this embodiment, the sealing structure 5 of the present application adopts liquid silicone material. The low-viscosity liquid silicone material can quickly fill the sealing cavity and can achieve rapid solidification in a short time, shortening the production time of the single cell structure 7, thereby improving the production efficiency of the single cell. The injection mold fixes the anode plate 2, the membrane electrode 3, and the cathode plate 4 through the clamping pressure when the injection upper mold 601 and the injection lower mold 602 are closed, and forms the mold hollow cooling area 605, the injection mold sealing area 606, and the sealing molding area 604 of the injection mold 6. The mold hollow cooling area 605 can effectively prevent the middle of the single cell structure 7 from contacting the heat source, thereby preventing the reaction area in the middle of the single cell structure 7 from being damaged due to excessive heating temperature, and reducing the risk of warping of the single cell structure 7; the injection mold sealing area 606 can effectively prevent glue overflow during the injection process. Phenomenon; In the sealing molding area 604, the sealant is quickly solidified through a medium-temperature rapid curing process to form a sealing structure 5; By adopting a low-pressure injection process, the sealant can be evenly injected into the single-cell frame structure 1, filling the gaps between the structures and effectively achieving sealing; and the low-pressure injection process provides a smaller injection pressure, avoiding excessive injection pressure to damage the single-cell frame structure 1; the low-pressure injection process can reduce or eliminate bubbles generated during the injection process, avoid causing injection defects such as material shortages and air holes in the sealing structure 5, and improve the quality of injection sealing. The integrated injection sealing fuel cell single-cell structure 7 manufacturing process proposed in this application can complete the production of the fuel cell single-cell structure 7 in a short time, thereby greatly improving production efficiency, and Jing'er has the beneficial effect of meeting mass production needs.

[0106] Please combine Figure 16 As shown, the present application also proposes an integrated glue-injected sealed fuel cell single cell structure 7 cell stack 8.

[0107] In an exemplary embodiment of the present application, the battery stack 8 includes a plurality of integrated glue-injected sealed fuel cell single cell structures 7 stacked and assembled in sequence, and the side of the anode plate 2 in the single cell structure 7 facing away from the membrane electrode 3 cooperates with the side of the cathode plate 4 in the adjacent single cell structure 7 facing away from the membrane electrode 3 to form a cooling water chamber 801.

[0108] Working principle: The anode plate 2, membrane electrode 3, and cathode plate 4 are stacked in sequence on the molding surface of the lower injection mold 602 of the injection mold 6, and the upper injection mold 601 and the lower injection mold 602 are closed to form the mold hollow cooling area 605, the injection mold sealing area 606, and the sealing molding area 604 of the injection mold 6. The anode plate 2, membrane electrode 3, and cathode plate 4 are fixed by the clamping pressure. Before the injection mold 6 is closed, the air in the injection mold 6 is evacuated by vacuum to form a negative pressure in the single cell frame structure 1. During injection, the sealant is prevented from being blocked in the injection channel, thereby improving the injection efficiency. The sealant is injected into the mold injection channel 601a set on the upper injection mold 601, and the sealant forms a water cavity sealing ring 503 between the water cavity sealing injection groove 601b and the surface of the cathode plate 4 away from the cathode side 308 of the membrane electrode. The sealant enters the membrane through the cathode plate injection connection hole 404a set on the cathode plate. The cathode side 308 of the electrode is formed, and a cathode sealing ring 502 is formed between the cathode plate 4 and the cathode side 308 of the membrane electrode. The sealant enters the anode side 307 of the membrane electrode through the membrane electrode glue injection connection hole 306h set on the membrane electrode 3, and forms an anode sealing ring 501 between the anode side 307 of the membrane electrode and the anode plate 2. The single cell frame structure 1 evacuates the air in the single cell frame structure 1 through the anode plate glue injection exhaust hole 203a set on the anode plate 2 to balance the internal gas pressure of the single cell frame structure 1, thereby ensuring the glue injection efficiency. After the sealant fills the single cell frame structure 1, the excess sealant flows from the anode plate glue injection exhaust hole 203a into the mold glue outlet channel 602a, thereby completing the glue injection. After the glue injection is completed, the sealant in the single cell frame structure 1 is quickly cured to form a sealing structure 5 by using a medium-temperature rapid curing process on the glue molding area 604 of the glue injection mold 6, thereby forming a sealed connection to form a single cell structure 7.The present application seals the anode plate 2, the membrane electrode 3 and the cathode plate 4 at the same time by injecting the sealant at one time, thereby achieving the sealing of the first reaction chamber 101, the second reaction chamber 102 and the cooling water flow channel area 402 of the cathode plate, thereby avoiding the problem of hydrogen, air or cooling water leaking into each other. By setting the hydrogen channel boss and the air channel boss on the membrane electrode 3, the sealant can be prevented from forming a seal at the first gas common channel 103 and the second gas common channel 105 on the membrane electrode 3 during the process of injecting the sealant, thereby avoiding clogging the first gas duct 304 and the second gas duct 305. 5, thereby having the beneficial effect of ensuring the sealing performance of the single cell structure 7 while avoiding affecting the reaction efficiency of the single cell structure 7; the integrated glue injection sealing fuel cell single cell structure 7 proposed in this application effectively improves the sealing performance of the single cell and the production efficiency of the single cell, simplifies the single cell assembly process, and reduces the production cost of the fuel cell single cell, thereby having the beneficial effect of meeting the needs of mass production; and the one-piece molded sealing structure 5 effectively reduces the ratio of the sealing structure 5 to the plate area, thereby increasing the effective reaction area ratio of the single cell structure 7, and thus improving the volume power density of the fuel cell.

[0109] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or modification made by those skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. An integrated glue-injection sealed fuel cell single cell structure, characterized in that: include: Anode plate, membrane electrode and cathode plate, wherein the anode plate, the membrane electrode and the cathode plate are stacked in sequence along the same direction to form a single cell frame structure; The single cell frame structure is provided with a plurality of glue injection holes, through which sealant is injected into the single cell frame structure to form a sealing structure, and the sealing structure is used to seal the single cell frame structure to form the integrated glue injection sealed fuel cell single cell structure; The sealing structure includes an anode sealing ring, a cathode sealing ring, a water cavity sealing ring and a sealing connection column formed by integral injection molding. The anode sealing ring is sealed between the anode plate and the membrane electrode, the cathode sealing ring is sealed between the cathode plate and the membrane electrode, and the water cavity sealing ring is connected to the side of the cathode plate away from the membrane electrode. A sealing connection column is formed at the injection hole, and the sealing connection column connects the anode sealing ring, the cathode sealing ring and the water cavity sealing ring into one; The anode plate is provided with an anode plate first gas flow channel area, the membrane electrode is provided with a membrane electrode reaction area corresponding to the anode plate first gas flow channel area, the cathode plate is provided with a cathode plate second gas flow channel area on a side facing the membrane electrode corresponding to the membrane electrode reaction area, and the cathode plate is provided with a cathode plate cooling water flow channel area on a side facing away from the membrane electrode. The anode plate first gas flow channel area and the membrane electrode reaction area form a first reaction chamber of the single cell frame structure, and the cathode plate second gas flow channel area and the membrane electrode reaction area form a second reaction chamber of the single cell frame structure; The single cell frame structure is provided with a first gas common channel, a cooling water common channel and a second gas common channel. The membrane electrode is provided with a first gas channel boss and a second gas channel boss around the first gas common channel and the second gas common channel respectively. A first gas duct is provided on the first gas channel boss of the membrane electrode and a second gas duct is provided on the second gas channel boss of the membrane electrode. The first reaction chamber is connected to the first gas common channel through the first gas duct, and the second reaction chamber is connected to the second gas common channel through the second gas duct. The cathode plate cooling water flow channel area is connected to the cooling water common channel.

2. The integrated glue-injection sealed fuel cell single cell structure according to claim 1, characterized in that: The membrane electrode also includes a membrane electrode frame, on which are provided a first gas inlet main channel for the membrane electrode, a main cooling water inlet channel for the membrane electrode, a second gas inlet main channel for the membrane electrode, a first gas outlet main channel for the membrane electrode, a main cooling water outlet main channel for the membrane electrode and a second gas outlet main channel for the membrane electrode. The membrane electrode frame is also provided with a membrane electrode sealing area, on which are distributed a plurality of membrane electrode glue injection connection holes.

3. The integrated glue injection sealed fuel cell single cell structure according to claim 2, characterized in that: The membrane electrode comprises a membrane electrode anode side and a membrane electrode cathode side along the thickness direction; The membrane electrode anode side includes a membrane electrode first gas inlet channel boss and a membrane electrode first gas outlet channel boss. The membrane electrode first gas inlet channel boss is arranged along the circumference of the membrane electrode first gas inlet main channel, and the membrane electrode first gas outlet channel boss is arranged along the circumference of the membrane electrode first gas outlet main channel. The membrane electrode first gas inlet channel boss is provided with a membrane electrode first gas inlet duct at one end close to the membrane electrode reaction zone, and the membrane electrode first gas outlet channel boss is provided with a membrane electrode first gas outlet duct at one end close to the membrane electrode reaction zone. The cathode side of the membrane electrode includes a membrane electrode second gas inlet channel boss and a membrane electrode second gas outlet channel boss. The membrane electrode second gas inlet channel boss is arranged along the circumference of the membrane electrode second gas inlet main channel, and the membrane electrode second gas outlet channel boss is arranged along the circumference of the membrane electrode second gas outlet main channel. The membrane electrode second gas inlet channel boss is provided with a membrane electrode second gas inlet duct at one end close to the membrane electrode reaction zone, and the membrane electrode second gas outlet channel boss is provided with a membrane electrode second gas outlet duct at one end close to the membrane electrode reaction zone.

4. The integrated glue injection sealed fuel cell single cell structure according to claim 3, characterized in that: The cathode plate also includes a cathode plate frame, on which are provided a first gas inlet channel for the cathode plate, a cooling water inlet channel for the cathode plate, a second gas inlet channel for the cathode plate, a first gas outlet channel for the cathode plate, a cooling water outlet channel for the cathode plate and a second gas outlet channel for the cathode plate; a cathode plate glue injection sealing groove is provided on the cathode plate frame corresponding to the membrane electrode sealing area; and a cathode plate glue injection connection hole is provided in the cathode plate glue injection sealing groove corresponding to the membrane electrode glue injection connection hole.

5. The integrated glue injection sealed fuel cell single cell structure according to claim 4, characterized in that: The cathode plate frame is provided with a cathode plate first flow channel extension area and a cathode plate second flow channel extension area, one end of the cathode plate first flow channel extension area is connected to the membrane electrode second gas inlet duct, and the other end is connected to the cathode plate second gas flow channel area; one end of the cathode plate second flow channel extension area is connected to the membrane electrode second gas outlet duct, and the other end is connected to the cathode plate second gas flow channel area; a cathode plate glue injection overflow groove is also provided between the cathode plate second gas flow channel area and the cathode plate glue injection sealing groove.

6. The integrated glue injection sealed fuel cell single cell structure according to claim 1, characterized in that: The anode plate also includes an anode plate frame, on which are provided a first gas inlet main channel for the anode plate, a cooling water inlet main channel for the anode plate, a second gas inlet main channel for the anode plate, a first gas outlet main channel for the anode plate, a cooling water outlet main channel for the anode plate and a second gas outlet main channel for the anode plate; an anode plate glue injection sealing groove is provided on the anode plate frame corresponding to the membrane electrode sealing area, and a plurality of anode plate glue injection exhaust holes are provided in the anode plate glue injection sealing groove.

7. The integrated glue injection sealed fuel cell single cell structure according to claim 6, characterized in that: The anode plate frame is provided with an anode plate first flow channel extension area and an anode plate second flow channel extension area. One end of the anode plate first flow channel extension area is connected to the membrane electrode first gas inlet duct, and the other end is connected to the anode plate first gas flow channel area. One end of the anode plate second flow channel extension area is connected to the membrane electrode first gas outlet duct, and the other end is connected to the anode plate first gas flow channel area; an anode plate glue injection overflow groove is also provided between the anode plate first gas flow channel area and the anode plate glue injection sealing groove.

8. The integrated glue injection sealed fuel cell single cell structure according to claim 3, characterized in that: The anode plate and the anode side of the membrane electrode are sealed and connected via the anode sealing ring, and the anode sealing ring is used to seal the first reaction chamber; The cathode plate and the cathode side of the membrane electrode are sealed and connected via the cathode sealing ring, and the cathode sealing ring is used to seal the second reaction chamber.

9. A glue injection mold, used for the integrated glue injection sealed fuel cell single cell structure according to any one of claims 1 to 8, characterized in that: The injection mold comprises: The glue injection upper mold has a plurality of mold glue injection channels coaxially arranged with the glue injection holes in the thickness direction, a water cavity sealing glue injection groove for glue injection molding of the water cavity sealing ring is provided on the molding surface of the glue injection upper mold, and a glue injection upper mold cooling groove is provided in the middle of the glue injection upper mold; The glue injection lower mold has a plurality of mold glue outlet channels coaxially arranged with the mold glue injection channel in the thickness direction, a glue injection lower mold cooling groove is provided in the middle of the glue injection lower mold, and a glue injection lower mold sealing molding groove is provided in the glue injection lower mold corresponding to the water cavity sealing glue injection groove; Among them, the mold injection channel and the mold glue outlet channel cooperate to form the injection flow channel of the injection mold, the water cavity sealing injection groove and the injection lower mold sealing molding groove cooperate to form the injection molding area of ​​the injection mold, and the injection upper mold cooling groove and the injection lower mold cooling groove cooperate to form the mold hollow cooling area of ​​the injection mold.

10. The injection mold according to claim 9, characterized in that: The glue injection upper mold is provided with a glue injection upper mold sealing groove corresponding to the glue injection overflow groove of the cathode plate, and the glue injection upper mold sealing groove matches the shape of the glue injection overflow groove of the cathode plate; The glue injection lower mold is provided with a glue injection lower mold sealing groove corresponding to the glue injection overflow groove of the anode plate, and the glue injection lower mold sealing groove matches the shape of the glue injection overflow groove of the anode plate; The glue sealing groove of the upper glue injection mold cooperates with the glue sealing groove of the lower glue injection mold to form the glue sealing area of ​​the glue injection mold.

11. A manufacturing process for an integrated glue injection sealed fuel cell single cell structure, comprising: using the glue injection mold according to any one of claims 9 to 10 to integrally inject and mold the integrated glue injection sealed single cell structure, characterized in that: The process comprises: The anode plate, the membrane electrode and the cathode plate are stacked in sequence on the molding surface of the lower injection mold; Clamping the upper injection mold and the lower injection mold; Using a vacuum pump to evacuate the air in the injection mold through the mold glue outlet channel; Injecting sealant into the injection mold through the mold injection channel by low-pressure injection to form the sealing structure in the single cell structure; The mold sealing molding area is heated to solidify the sealing structure.

12. An integrated glue-injection sealed fuel cell single cell structure battery stack, characterized in that: The battery stack comprises a plurality of integrated glue injection sealed fuel cell single cell structures as described in any one of claims 1 to 8, which are stacked and assembled in sequence. The side of the anode plate in the single cell structure facing away from the membrane electrode cooperates with the side of the cathode plate in the adjacent single cell structure facing away from the membrane electrode to form a cooling water cavity, and the water cavity sealing ring is used to seal the cooling water cavity.

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