A magnetically conductive fuel cell bipolar plate flow channel structure

Abstract

The present invention relates to the technical field of fuel cells, and discloses a magnetically conductive fuel cell bipolar plate flow channel structure, comprising an anode plate body and a cathode plate body with the same structure, wherein a flow channel for flowing gas is formed in the grooves inside the anode plate body and the cathode plate body by means of a plurality of groups of equally spaced spacers; a flow suppression block is movably connected at equal intervals at the front and rear of the bottom of the flow channel; when the gas flow rate in the flow channel is large, the present invention can ensure that the gas flows slowly through the flow channel, ensure the uniform distribution and diffusion of the gas and the reaction efficiency, and prevent the gas flow rate from being too fast, causing uneven gas diffusion and resulting in insufficient reaction; when the gas flow rate in the flow channel is small, the gas can flow smoothly through the flow channel, ensure that there is enough gas for uniform distribution and diffusion and to ensure reaction efficiency, and prevent the lack of uniform diffusion of the gas, resulting in insufficient reaction.

Description

Technical Field

[0001] The invention relates to the technical field of fuel cells, and in particular to a magnetically conductive bipolar plate flow channel structure for a fuel cell. Background Art

[0002] The design of the gas flow channel in the fuel cell has an important impact on the battery performance. The flow channel is used to transfer hydrogen in the battery and promote its reaction with oxygen near the catalyst layer to generate electricity and water. When the flow rate of hydrogen entering the flow channel is large, the hydrogen cannot diffuse evenly, and the hydrogen may not be able to react with the catalyst layer fully or in time. When the flow rate of hydrogen entering the flow channel is small, there will be insufficient hydrogen diffusion and insufficient hydrogen to react with the catalyst layer, which will lead to a decrease in battery performance. For this reason, we have introduced a magnetically conductive fuel cell bipolar plate flow channel structure. Summary of the invention

[0003] The object of the present invention is to provide a magnetically conductive fuel cell bipolar plate flow channel structure to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solutions: A magnetically conductive fuel cell bipolar plate flow channel structure, comprising an anode plate body and a cathode plate body of the same structure, wherein a flow channel for flowing gas is formed in the grooves inside the anode plate body and the cathode plate body through a plurality of groups of equally spaced spacers;

[0005] The bottom of the flow channel is movably connected with flow-reducing resistance blocks at equal intervals in front and back;

[0006] A moving frame is provided at the front of the groove inside the anode plate body and the cathode plate body, and the moving frame moves forward and backward under the action of the electromagnets at the front ends of the anode plate body and the cathode plate body;

[0007] A limit seat is provided at the front end of the flow channel, and a gas outlet assembly is also provided on the mobile frame, which penetrates and extends out of the limit seat. The gas outlet assembly is connected with the gas inlet pipe assembly at the middle of the front end of the anode plate body and the cathode plate body through the mobile frame;

[0008] The partition plate is also provided with a slot corresponding to the position of the flow suppression block, and a toggle assembly is slidably connected in the slot, and the pull rods on the mobile frame extend into the corresponding partition plate at intervals, and the toggle assembly is fixed on the pull rods;

[0009] As the movable frame moves forward and backward, the end of the air outlet component cooperates with the limit seat, thereby adjusting the flow of gas entering the flow channel through the air outlet component. At the same time, by moving the flow suppression block through the toggle component, the angle of the flow suppression block is adjusted, thereby adjusting the speed of the gas flowing through the flow channel.

[0010] Preferably, the movable frame includes a hollow metal movable frame slidably connected to the front part of the groove, and a light rod is provided at the front end of the hollow metal movable frame and extends through the groove, and a limiting convex disc is provided at the end of the light rod, and a spring is also sleeved on the light rod, and both ends of the spring rest against the inner wall of the groove and the front end surface of the hollow metal movable frame.

[0011] Preferably, the air intake pipe assembly comprises an air intake pipe connected to the middle of the front end of the anode plate body and the cathode plate body, and a rubber bellows connected after the rear end of the air intake pipe extends into the groove;

[0012] The rear end of the rubber bellows is connected to the middle part of the front end of the hollow metal moving frame, so that the rubber bellows is communicated with the inner cavity of the hollow metal moving frame.

[0013] Preferably, the gas outlet assembly includes a gas outlet pipe and a truncated cone-shaped hollow tube fixed at equal intervals at the rear end of the hollow metal mobile frame, the surface of the truncated cone-shaped hollow tube is evenly distributed with gas outlet holes, and the middle part of the front end of the truncated cone-shaped hollow tube is connected with an external threaded cylinder;

[0014] The air outlet pipe is connected with the inner cavity of the hollow metal moving frame, and a truncated cone-shaped cavity consistent with the shape of the truncated cone-shaped hollow pipe is arranged in the middle of the rear end of the limiting seat. The rear end of the air outlet pipe extends into the truncated cone-shaped cavity and is screwed with the external threaded tube.

[0015] Preferably, the front end of the flow suppression block is fan-shaped, and the cylinder in the middle of the lower end of the flow suppression block is inserted into the limiting hole at the bottom of the flow channel;

[0016] A plurality of groups of flow guiding chute grooves distributed at equal intervals are arranged on the upper part of the flow suppression resistance block.

[0017] Preferably, the toggle assembly comprises a sleeve fixed on the pull rod and a toggle plate fixed at the front and rear ends of both sides of the sleeve, and the toggle plate is slidably connected in the corresponding slot;

[0018] A convex plate is provided on one side of the flow suppression resistance block close to the toggle assembly, arc-shaped protrusions are provided in the middle of the front and rear ends of the convex plate, and the convex plate extends between the front and rear corresponding toggle plates.

[0019] Preferably, a gas diffusion layer is provided on the surface of the grooves inside the anode plate body and the cathode plate body, a proton exchange membrane is provided between the two groups of gas diffusion layers, and a catalytic layer is provided on the surface of the gas diffusion layer close to one end of the proton exchange membrane.

[0020] Preferably, a discharge pipe is further provided at the middle of the rear end of the anode plate body and the cathode plate body.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention can adjust the front and rear movement of the movable frame so that the end of the gas outlet component cooperates with the limit seat, thereby adjusting the flow rate of the gas entering the flow channel through the gas outlet component, and at the same time, by moving the flow suppression block by the toggle assembly, the angle of the flow suppression block can be adjusted, thereby adjusting the speed of the gas flowing through the flow channel; when the gas flow rate in the flow channel is large, it can ensure that the gas flows slowly in the flow channel, ensuring the uniform distribution and diffusion of the gas and the reaction efficiency, preventing the gas flow rate from being too fast, causing uneven gas diffusion, and resulting in insufficient reaction; when the gas flow rate in the flow channel is small, it can ensure that the gas flows smoothly in the flow channel, ensuring that there is enough gas for uniform distribution and diffusion and reaction efficiency, and preventing insufficient reaction due to insufficient gas for uniform diffusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the first three-dimensional structure of the anode plate body of the present invention;

[0024] Figure 3 It is a second three-dimensional structural schematic diagram of the anode plate body of the present invention;

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the connection between the pull rod, the air outlet pipe and the movable frame of the present invention;

[0026] Figure 5 It is a schematic diagram of the three-dimensional structure of the connection between the externally threaded cylinder and the truncated cone-shaped hollow tube of the present invention;

[0027] Figure 6 It is a three-dimensional structural schematic diagram of the toggle assembly of the present invention;

[0028] Figure 7 It is a schematic diagram of the three-dimensional structure of the flow suppression resistance block of the present invention;

[0029] Figure 8 It is a schematic diagram of the top view of the flow suppression block of the present invention;

[0030] Fig. 9 It is a schematic diagram of the three-dimensional structure of the flow suppression resistance block, the toggle assembly and the pull rod in the initial state of the present invention;

[0031] Fig.10 For the present invention Fig. 9 The enlarged structural diagram at A in the middle;

[0032] Fig.11 For the present invention Fig. 9 A schematic diagram of a top view structure;

[0033] Fig.12 For the present invention Fig.11 The enlarged structural diagram at B in the middle;

[0034] Fig.13 It is a schematic diagram of the three-dimensional structure of the connection between the flow suppression block, the movable frame, the gas outlet assembly and the anode plate body in the initial state of the present invention;

[0035] Fig.14 For the present invention Fig.13 A schematic diagram of a top view structure;

[0036] Fig.15 For the present invention Fig.14 The enlarged structural diagram at C in the middle;

[0037] Fig.16 It is a schematic diagram of the three-dimensional structure of the flow suppression block, the movable frame, the gas outlet assembly and the anode plate body connected after the flow suppression block is rotated by an angle according to the present invention;

[0038] Fig.17 For the present invention Fig.16 A schematic diagram of a top view structure;

[0039] Fig.18 For the present invention Fig.17 The enlarged structural diagram at D in the middle;

[0040] Fig.19 It is a schematic diagram of the top view of the structure of the flow suppression resistance block of the present invention being connected to the toggle assembly after being rotated at an angle.

[0041] In the figure: 1. anode plate; 101. air inlet pipe; 102. electromagnet; 103. limiting convex disc; 104. flow channel; 105. partition plate; 106. limiting hole; 107. discharge pipe; 108. slot; 109. limiting seat; 1091. truncated cone cavity; 110. rubber bellows; 111. hollow metal moving frame; 112. pull rod; 113. air outlet pipe; 114. spring; 115. bare rod; 116. external threaded cylinder; 117. truncated cone hollow tube; 118. air outlet hole; 119. sleeve; 120. toggle plate; 121. flow suppression block; 122. cylinder; 123. convex plate; 124. arc-shaped protrusion; 125. guide chute; 2. cathode plate; 3. gas diffusion layer; 4. proton exchange membrane. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Example:

[0044] See also Figure 1-19 , the present invention provides a technical solution:

[0045] A magnetically conductive fuel cell bipolar plate flow channel structure comprises an anode plate body 1 and a cathode plate body 2 of the same structure, wherein a flow channel 104 for flowing gas is formed in the grooves inside the anode plate body 1 and the cathode plate body 2 through a plurality of groups of equally spaced spacers 105, a gas diffusion layer 3 is provided on the surface of the grooves inside the anode plate body 1 and the cathode plate body 2, a proton exchange membrane 4 is provided between the two groups of gas diffusion layers 3, and a catalyst layer is provided on the surface of the gas diffusion layer 3 close to one end of the proton exchange membrane 4.

[0046] Models of gas diffusion layer 3 include Toray carbon paper series of carbon fiber paper (such as YLS30T, YLS25, YLS30, YLS35), woven cloth GDL of carbon fiber woven cloth, non-woven cloth GDL of carbon fiber non-woven cloth, carbon black paper GDL of carbon black paper and other models that meet the use requirements.

[0047] The catalytic layer is mainly composed of a catalyst and a carrier. Common catalysts include platinum (Pt), platinum alloys (such as Pt-Ru, Pt-Co, etc.) and other non-precious metal catalysts (such as palladium, nickel, etc.). The carrier is usually selected from materials with high specific surface area and good conductivity, such as carbon black, carbon nanotubes or graphene.

[0048] The proton exchange membrane 4 adopts Nafion series membrane produced by DuPont Company of the United States, proton exchange membrane produced by Gore Company of the United States, Aciplex series membrane produced by Asahi Company of Japan, or other proton exchange membranes that meet the use requirements.

[0049] The hydrogen enters the flow channel 104 on the anode plate 1 from the anode plate 1, and reaches the catalyst layer from the gas diffusion layer 3 on the anode plate 1. The catalyst undergoes an oxidation reaction to generate hydrogen ions and electrons, and the hydrogen is then discharged from the discharge pipe 107 of the anode plate 1.

[0050] The proton exchange membrane 4 has high proton permeability and electronic insulation, so hydrogen ions can directly pass through the proton exchange membrane 4 into the catalyst layer on the cathode plate 2, while electrons need to be transported to the current collector through the porous electrode, flow through the external load to reach the catalyst layer on the cathode plate 2. Similarly, oxygen undergoes a reduction reaction on the catalyst layer on the cathode plate 2 to generate water, which enters the cathode flow channel through the porous medium and is finally discharged through the discharge pipe 107 of the cathode plate 2 under the purge of oxygen.

[0051] A limit seat 109 is provided at the front end of the flow channel 104, and a discharge pipe 107 is also provided at the middle of the rear end of the anode plate body 1 and the cathode plate body 2;

[0052] The rear end of the flow channel 104 is open, so that after the gas (hydrogen or oxygen) flows from the front of the flow channel 104 to the rear of the flow channel 104, the gas or generated water can smoothly gather from the rear of the flow channel 104 and be discharged through the discharge pipe 107.

[0053] The bottom of the flow channel 104 is movably connected with flow suppression blocks 121 at equal intervals at the front and back. The front end of the flow suppression blocks 121 is fan-shaped. When the gas in the flow channel 104 flows from front to back, when the gas contacts the front end surface of the flow suppression blocks 121, the gas will flow to the two ends of the flow suppression blocks 121, thereby reducing the time for the gas to pass through the flow suppression blocks 121, and further reducing the flow rate of the gas.

[0054] The cylinder 122 at the middle of the lower end of the flow suppression block 121 is inserted into the limiting hole 106 at the bottom of the flow channel 104. When the toggle assembly moves back and forth with the pull rod 112, the flow suppression block 121 can rotate around the cylinder 122.

[0055] A plurality of groups of equally spaced flow guide chute 125 are provided on the upper portion of the flow suppression block 121. Fig. 9 , 10 As shown in Figures 11, 12, 13, 14 and 15, in the initial state, the flow suppression block 121 is perpendicular to the longitudinal direction of the flow channel 104, so that the guide groove 125 forms a certain angle with the longitudinal direction of the flow channel 104, and the two ends of the flow suppression block 121 are attached to the inner wall of the partition plate 105, so that when the gas in the flow channel 104 flows from front to back, a part of the gas will be temporarily blocked by the flow suppression block 121, and the other part of the gas will flow out through the guide groove 125, thereby reducing the flow rate of the gas in the flow channel 104.

[0056] The diversion chute 125 is arranged at a certain angle to the longitudinal direction of the flow channel 104, so that when the gas flows out through the diversion chute 125, the flow stroke is increased, thereby reducing the gas flow rate;

[0057] Furthermore, by providing the guide chute 125 , the gas at this time will not be completely blocked by the flow suppression block 121 , and the flow of the gas in the flow channel 104 can still be guaranteed.

[0058] like Fig.16 , 17 As shown in FIGS. 18 and 19, the electromagnet 102 is energized to drive the hollow metal moving frame 111 to move forward, so that when the pull rod 112 drives the toggle assembly to move forward along the slot 108, the toggle assembly toggle the flow suppression block 121 to rotate the angle with the cylinder 122 as the center until the diversion chute 125 is parallel to the longitudinal direction of the flow channel 104, and the end of the flow suppression block 121 away from the toggle assembly is no longer attached to the surface of the corresponding partition plate 105 (a gap is formed between one end of the flow suppression block 121 and the surface of the corresponding partition plate 105);

[0059] In this way, when the gas in the flow channel 104 flows from front to back, part of the gas will flow backward through the above-mentioned gap, and the other part of the gas will flow directly backward along the guide chute 125 to ensure the flow rate of the gas in the flow channel 104.

[0060] Since the guide chute 125 is parallel to the longitudinal direction of the flow channel 104 , the gas can flow directly backward through the guide chute 125 , and the guide chute 125 will not reduce the gas flow rate.

[0061] A moving frame is provided at the front of the groove inside the anode plate body 1 and the cathode plate body 2. Under the action of the electromagnet 102 at the front end of the anode plate body 1 and the cathode plate body 2, the moving frame moves forward and backward;

[0062] The movable frame includes a hollow metal movable frame 111 which is slidably connected to the front of the groove, and a light rod 115 which passes through and extends out of the groove is provided at the front end of the hollow metal movable frame 111, and a limiting convex plate 103 is provided at the end of the light rod 115. A spring 114 is also sleeved on the light rod 115, and both ends of the spring 114 are against the inner wall of the groove and the front end surface of the hollow metal movable frame 111.

[0063] In the initial state, under the elastic force of the spring 114 on the hollow metal moving frame 111, the distance between the hollow metal moving frame 111 and the electromagnet 102 is the farthest. At this time, the limiting convex plate 103 is closely attached to the outer wall of the anode plate body 1 and the cathode plate body 2;

[0064] At the same time, the truncated cone-shaped hollow tube 117 is extended from the truncated cone-shaped cavity 1091 on the limiting seat 109, and the gas is ensured to flow out of the truncated cone-shaped hollow tube 117 at a maximum flow rate.

[0065] The electromagnet 102 is connected and disconnected with the power supply under the control of the PLC, and can control the magnitude of the current flowing through the electromagnet 102 , thereby controlling the magnitude of the suction force of the electromagnet 102 on the hollow metal moving frame 111 .

[0066] When the electromagnet 102 is energized, suction is generated, causing the hollow metal moving frame 111 to move forward while overcoming the elastic force of the spring 114, so that the air outlet pipe 113 on the hollow metal moving frame 111 drives the truncated cone-shaped hollow tube 117 to move forward until the truncated cone-shaped hollow tube 117 enters the truncated cone-shaped cavity 1091. In this way, the distance between the outer surface of the truncated cone-shaped hollow tube 117 and the inner wall of the truncated cone-shaped cavity 1091 gradually decreases, thereby reducing the gas flow rate flowing out through the air outlet 118, thereby reducing the gas flow rate flowing into the flow channel 104.

[0067] When the electromagnet 102 exerts a strong suction force on the hollow metal moving frame 111, the distance between the outer surface of the truncated cone shaped hollow tube 117 and the inner wall of the truncated cone shaped cavity 1091 is small, and the gas flow rate flowing out through the air outlet 118 is small, thereby making the gas flow rate flowing into the flow channel 104 smaller.

[0068] When the suction force of the electromagnet 102 on the hollow metal moving frame 111 is small, the distance between the outer surface of the truncated cone hollow tube 117 and the inner wall of the truncated cone cavity 1091 is large, the gas flow rate flowing out through the air outlet 118 is large, and thus the gas flow rate flowing into the flow channel 104 is large.

[0069] The mobile frame is also provided with an air outlet assembly penetrating and extending through the limit seat 109, and the air outlet assembly is connected with the air inlet pipe assembly at the middle of the front end of the anode plate body 1 and the cathode plate body 2 through the mobile frame;

[0070] The air intake pipe assembly includes an air intake pipe 101 connected to the middle of the front end of the anode plate body 1 and the cathode plate body 2, and a rubber bellows 110 connected after the rear end of the air intake pipe 101 extends into the groove;

[0071] The rear end of the rubber bellows 110 is connected to the middle of the front end of the hollow metal moving frame 111 , so that the rubber bellows 110 is communicated with the inner cavity of the hollow metal moving frame 111 .

[0072] By setting the rubber bellows 110 , the rubber bellows 110 is retractable, so when the hollow metal moving frame 111 moves forward and backward, it can be ensured that gas can still be introduced into the inner cavity of the hollow metal moving frame 111 through the air inlet pipe 101 .

[0073] The gas outlet assembly includes a gas outlet pipe 113 and a truncated cone-shaped hollow tube 117 fixed at equal intervals at the rear end of the hollow metal mobile frame 111. The surface of the truncated cone-shaped hollow tube 117 is evenly distributed with gas outlet holes 118. The middle part of the front end of the truncated cone-shaped hollow tube 117 is connected with an external threaded tube 116.

[0074] The air outlet pipe 113 is connected to the inner cavity of the hollow metal movable frame 111 , and a truncated cone-shaped cavity 1091 having the same shape as the truncated cone-shaped hollow tube 117 is provided in the middle of the rear end of the limiting seat 109 . The rear end of the air outlet pipe 113 extends into the truncated cone-shaped cavity 1091 and is screwed to the external threaded tube 116 .

[0075] The truncated cone-shaped hollow tube 117 is narrow at the front and wide at the back, and the truncated cone-shaped cavity 1091 is also narrow at the front and wide at the back.

[0076] Gas is introduced into the inner cavity of the hollow metal moving frame 111 through the air inlet pipe 101 and the rubber bellows 110 , and then enters the external threaded tube 116 through the air outlet pipe 113 , and finally enters the truncated cone-shaped hollow tube 117 and is discharged from the air outlet 118 into the flow channel 104 .

[0077] The partition plate 105 is also provided with a slot 108 corresponding to the position of the flow-suppressing resistance block 121, and a toggle assembly is slidably connected in the slot 108. The pull rod 112 on the mobile frame extends into the corresponding partition plate 105 at intervals, and the toggle assembly is fixed on the pull rod 112;

[0078] As the movable frame moves forward and backward, the end of the gas outlet component cooperates with the limit seat 109, thereby adjusting the flow rate of the gas entering the flow channel 104 through the gas outlet component. At the same time, by moving the flow suppression block 121 through the toggle component, the angle of the flow suppression block 121 is adjusted, thereby adjusting the speed of the gas flowing through the flow channel 104.

[0079] The toggle assembly includes a sleeve 119 sleeved and fixed on the pull rod 112 and a toggle plate 120 fixed at the front and rear ends of both sides of the sleeve 119, and the toggle plate 120 is slidably connected in the corresponding slot 108;

[0080] A convex plate 123 is provided on one side of the flow suppression resistance block 121 close to the toggle assembly. An arc-shaped protrusion 124 is provided in the middle of the front and rear ends of the convex plate 123 , and the convex plate 123 extends between the front and rear corresponding toggle plates 120 .

[0081] With such an arrangement, when the pull rod 112 drives the toggle assembly to move forward and backward, the protruding plate 123 is always located between the front and rear corresponding toggle plates 120, so that the flow suppression block 121 rotates at an angle with the cylinder 122 as the center.

[0082] Specifically, when in use, gas is introduced into the inner cavity of the hollow metal moving frame 111 through the air inlet pipe 101 and the rubber bellows 110, and the gas then enters the external threaded tube 116 through the air outlet pipe 113, and finally enters the truncated cone-shaped hollow tube 117 and is then discharged from the air outlet 118 into the flow channel 104.

[0083] In the initial state, the truncated cone-shaped hollow tube 117 extends from the truncated cone-shaped cavity 1091 on the limiting seat 109, and the gas is ensured to flow out of the truncated cone-shaped hollow tube 117 at a maximum flow rate;

[0084] At the same time, the flow-reducing resistance block 121 is perpendicular to the longitudinal direction of the flow channel 104, so that the guide chute 125 forms a certain angle with the longitudinal direction of the flow channel 104, and the two ends of the flow-reducing resistance block 121 are attached to the inner wall of the partition plate 105;

[0085] In this way, when the gas flow in the flow channel 104 is large, part of the gas will be temporarily blocked by the flow suppression block 121, and the other part of the gas will flow out through the guide chute 125, thereby reducing the flow rate of the gas in the flow channel 104, ensuring that the gas flows slowly in the flow channel 104, ensuring the uniform distribution and diffusion of the gas and the reaction efficiency, and preventing the gas flow rate from being too fast, causing uneven gas diffusion and resulting in insufficient reaction.

[0086] After the electromagnet 102 is energized, suction is generated, so that the hollow metal moving frame 111 moves forward under the action of overcoming the elastic force of the spring 114, so that the gas outlet pipe 113 on the hollow metal moving frame 111 drives the truncated cone-shaped hollow tube 117 to move forward until the truncated cone-shaped hollow tube 117 enters the truncated cone-shaped cavity 1091, so that the distance between the outer surface of the truncated cone-shaped hollow tube 117 and the inner wall of the truncated cone-shaped cavity 1091 is gradually reduced, so that the gas flow rate flowing out through the gas outlet 118 becomes smaller, thereby reducing the gas flow rate flowing into the flow channel 104;

[0087] At this time, when the pull rod 112 drives the toggle assembly to move forward along the slot 108, the toggle assembly toggle the flow suppression block 121 to rotate around the cylinder 122 until the flow guide chute 125 is parallel to the longitudinal direction of the flow channel 104, and the end of the flow suppression block 121 away from the toggle assembly is no longer attached to the surface of the corresponding partition plate 105 (a gap is formed between one end of the flow suppression block 121 and the surface of the corresponding partition plate 105);

[0088] In this way, when the gas in the flow channel 104 flows from front to back, part of the gas will flow backward through the above-mentioned gap, and the other part of the gas will flow directly backward along the guide groove 125, ensuring the flow rate of the gas in the flow channel 104, ensuring that the gas flows smoothly in the flow channel 104, ensuring that there is enough gas for uniform distribution and diffusion, and ensuring the reaction efficiency, preventing insufficient reaction due to insufficient gas for uniform diffusion.

[0089] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A magnetically conductive fuel cell bipolar plate flow channel structure, comprising an anode plate body and a cathode plate body of the same structure, characterized in that: The grooves inside the anode plate body and the cathode plate body are provided with a plurality of groups of equally spaced spacers to form flow channels for flowing gas; The bottom of the flow channel is movably connected with flow-reducing resistance blocks at equal intervals in front and back; A moving frame is provided at the front of the groove inside the anode plate body and the cathode plate body, and the moving frame moves forward and backward under the action of the electromagnets at the front ends of the anode plate body and the cathode plate body; A limit seat is provided at the front end of the flow channel, and a gas outlet assembly is also provided on the mobile frame, which penetrates and extends out of the limit seat. The gas outlet assembly is connected with the gas inlet pipe assembly at the middle of the front end of the anode plate body and the cathode plate body through the mobile frame; The partition plate is also provided with a slot corresponding to the position of the flow suppression block, and a toggle assembly is slidably connected in the slot, and the pull rods on the mobile frame extend into the corresponding partition plate at intervals, and the toggle assembly is fixed on the pull rods; As the movable frame moves forward and backward, the end of the air outlet component cooperates with the limit seat, thereby adjusting the flow of gas entering the flow channel through the air outlet component. At the same time, by moving the flow suppression block through the toggle component, the angle of the flow suppression block is adjusted, thereby adjusting the speed of the gas flowing through the flow channel.

2. The magnetically conductive fuel cell bipolar plate flow channel structure according to claim 1, characterized in that: The movable frame comprises a hollow metal movable frame slidably connected to the front of the groove, and a light rod is provided at the front end of the hollow metal movable frame and extends through the groove, and a limiting convex disc is provided at the end of the light rod. A spring is also sleeved on the light rod, and both ends of the spring abut against the inner wall of the groove and the front end surface of the hollow metal movable frame.

3. The magnetically conductive fuel cell bipolar plate flow channel structure according to claim 2, characterized in that: The air intake pipe assembly comprises an air intake pipe connected to the middle of the front end of the anode plate body and the cathode plate body, and a rubber bellows connected after the rear end of the air intake pipe extends into the groove; The rear end of the rubber bellows is connected to the middle part of the front end of the hollow metal moving frame, so that the rubber bellows is communicated with the inner cavity of the hollow metal moving frame.

4. The magnetically conductive fuel cell bipolar plate flow channel structure according to claim 3, characterized in that: The air outlet assembly includes an air outlet pipe and a truncated cone-shaped hollow tube fixed at equal intervals at the rear end of the hollow metal mobile frame, the surface of the truncated cone-shaped hollow tube is evenly distributed with air outlet holes, and the middle part of the front end of the truncated cone-shaped hollow tube is connected with an external threaded cylinder; The air outlet pipe is connected with the inner cavity of the hollow metal moving frame, and a truncated cone-shaped cavity consistent with the shape of the truncated cone-shaped hollow pipe is arranged in the middle of the rear end of the limiting seat. The rear end of the air outlet pipe extends into the truncated cone-shaped cavity and is screwed with the external threaded tube.

5. The magnetically conductive fuel cell bipolar plate flow channel structure according to claim 1, characterized in that: The front end of the flow suppression block is fan-shaped, and the cylinder in the middle of the lower end of the flow suppression block is inserted into the limiting hole at the bottom of the flow channel; A plurality of groups of flow guiding chute grooves distributed at equal intervals are arranged on the upper part of the flow suppression resistance block.

6. The magnetically conductive fuel cell bipolar plate flow channel structure according to claim 5, characterized in that: The toggle assembly includes a sleeve sleeved and fixed on the pull rod and a toggle plate fixed at the front and rear ends of both sides of the sleeve, and the toggle plate is slidably connected in the corresponding slot; A convex plate is provided on one side of the flow suppression resistance block close to the toggle assembly, arc-shaped protrusions are provided in the middle of the front and rear ends of the convex plate, and the convex plate extends between the front and rear corresponding toggle plates.

7. The magnetically conductive fuel cell bipolar plate flow channel structure according to claim 1, characterized in that: The surfaces of the grooves in the anode plate body and the cathode plate body are provided with gas diffusion layers, a proton exchange membrane is provided between the two groups of gas diffusion layers, and a catalytic layer is provided on the surface of the gas diffusion layer close to one end of the proton exchange membrane.

8. The magnetically conductive fuel cell bipolar plate flow channel structure according to claim 1, characterized in that: A discharge pipe is also provided at the middle of the rear end of the anode plate body and the cathode plate body.

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