Fuel cell stack based on anti-reverse membrane electrode

Abstract

The invention belongs to the technical field of fuel cell stacks, and discloses a fuel cell stack based on an anti-reverse-pole membrane electrode, the fuel cell stack comprises anti-reverse-pole stack members, a shell member and a moving member, the shell member and the moving member are detachably connected, a space for accommodating a plurality of anti-reverse-pole stack members is formed between the shell member and the moving member, the top of the moving member sinks inwards along the length direction of the moving member to form a top groove, and the top groove is formed in the top of the moving member. A baffle is fixedly connected into the top groove, two clamping plates are symmetrically and fixedly connected to the bottom of the anti-reverse-pole electric pile piece, and grooves matched with the baffle are formed in the clamping plates. According to the invention, the clamping plates at the bottoms of the anti-reverse-pole electric piles are clamped with the baffle plates in the top grooves in the moving part, so that a plurality of anti-reverse-pole electric piles are mounted on the moving plate, when another anti-reverse-pole electric pile is damaged, only the damaged anti-reverse-pole electric pile needs to be pulled, and the damaged anti-reverse-pole electric pile moves on the side edge of the moving part; therefore, the maintenance and replacement difficulty of the electric pile is low, and the maintenance and replacement efficiency is high.

Description

Technical Field

[0001] The present invention belongs to the technical field of fuel cell stacks, and in particular relates to a fuel cell stack based on an anti-reverse polarity membrane electrode. Background Art

[0002] Fuel cell stacks, as efficient and clean energy conversion devices, have been widely used in new energy vehicles and distributed power generation in recent years. A fuel cell stack consists of multiple cells connected in series. Each cell primarily comprises a proton exchange membrane, an anode gas diffusion layer, an anode catalyst layer, a cathode catalyst layer, and a cathode gas diffusion layer. During operation, hydrogen undergoes an oxidation reaction in the anode catalyst layer, producing protons and electrons. Oxygen undergoes a reduction reaction in the cathode catalyst layer, combining with protons to form water. Simultaneously, electrons flow through an external circuit to form an electric current, thereby outputting electrical energy. However, during actual operation, fuel cell stacks may experience reverse polarity due to improper operation, insufficient gas supply, or system control errors. Reverse polarity occurs when the electrode that should be the anode unexpectedly becomes the cathode, while the electrode that should be the cathode becomes the anode, during normal operation of the fuel cell stack. This phenomenon can severely damage the catalyst layer of the membrane electrode, particularly the platinum-carbon catalyst on the anode side. The carbon support or carbon diffusion material of the catalyst is easily oxidized under reverse polarity conditions, leading to irreversible degradation of the membrane electrode performance, seriously affecting the energy output of the fuel cell stack and the reliability and stability of the system. In order to improve the anti-reverse polarity capability of the membrane electrode, the prior art generally adds an appropriate amount of anti-reverse polarity active material, such as an oxygen evolution catalyst, to the catalyst and the membrane electrode to enhance its anti-reverse polarity performance.

[0003] Because when existing batteries are used, multiple battery stacks are fixed in series by screws. Therefore, when one of the battery stacks fails or is damaged, all the battery stacks need to be disassembled as a whole before the damaged battery stack can be located for replacement and repair. Therefore, the repair and replacement of the battery stack is difficult and the repair and replacement efficiency is low. Summary of the Invention

[0004] The object of the present invention is to provide a fuel cell stack based on an anti-reverse polarity membrane electrode to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a fuel cell stack based on an anti-reverse pole membrane electrode, comprising an anti-reverse pole stack component, a detachably connected shell component and a movable component, wherein a space for accommodating multiple anti-reverse pole stack components is formed between the shell component and the movable component, the top of the movable component is sunken along its own length direction to form a top groove, a baffle is fixedly connected to the inside of the top groove, and two clamping plates are symmetrically fixedly connected to the bottom of the anti-reverse pole stack component, and the clamping plates are provided with grooves matching the baffles.

[0006] Preferably, both sides of the movable part are symmetrically connected to the limiting plate in rotation, and the limiting plate protrudes outward toward one side of the anti-reverse polarity stack to form a bulge, and a reset spring is installed on the limiting plate, and the two free ends of the reset spring are fixedly connected to the movable part and the limiting plate respectively.

[0007] Preferably, the housing member includes an outer shell, one side of the outer shell is open to form an inner cavity, and a connecting plate for connecting cables is fixedly connected to one side of the outer shell.

[0008] Preferably, a side frame is fixedly connected to the outer side of the shell, and a through-type bolt hole is opened on the side frame.

[0009] Preferably, the movable member includes an end plate, a side of the end plate facing the inner cavity is fixedly connected to the movable plate, the top groove is formed on the top of the movable plate, and a through hole is opened on the end plate.

[0010] Preferably, the inner cavity is symmetrically connected to two screw rods for rotation, and the bottom of the movable plate is symmetrically fixedly connected to two bottom blocks, and the bottom blocks are screwed together and connected to the screw rods.

[0011] Preferably, a motor is fixedly connected to the outside of the housing, and an output end of the motor is connected to the screw rod.

[0012] Preferably, the anti-reverse polarity stack comprises two symmetrically arranged bipolar plates, an anti-reverse polarity membrane electrode is installed between the two bipolar plates, and the top of the clamping plate is fixedly connected to the bottom of the bipolar plates and the anti-reverse polarity membrane electrode.

[0013] Preferably, a heat sink for dissipating heat is fixedly connected to the top of the housing, and a liquid infusion channel for conveying heat-conducting liquid along a preset path is formed on the heat sink.

[0014] Preferably, the heat dissipation element comprises a heat dissipation plate with a cavity formed therein, and two liquid guide tubes communicating with the cavity are fixedly connected to the heat dissipation plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The present invention allows multiple anti-reversing pole stack components to be installed on the movable plate by engaging the clamping plate at the bottom of the anti-reversing pole stack component with the baffle in the top groove on the movable part. When another anti-reversing pole stack component is damaged, it is only necessary to pull the damaged anti-reversing pole stack component to move the damaged anti-reversing pole stack component to the side of the movable part, and then separate the clamping plate from the baffle to replace the anti-reversing pole stack component. There is no need to disassemble all the stacks as a whole and then locate the damaged stack for replacement and maintenance like in traditional devices. Therefore, the difficulty of repairing and replacing the stack is low and the repair and replacement efficiency is high.

[0017] (2) After the anti-reversal electrode stack is installed on the movable plate, the present invention cooperates with the reset spring to keep the limit plate at the normal angle of the anti-reversal electrode stack. After the anti-reversal electrode stack is installed on the movable plate, the limit plate is used to contact the anti-reversal electrode stack to fix it, so that the anti-reversal electrode stack is more secure after installation. When personnel replace the anti-reversal electrode stack, they only need to pull the limit plate. The device not only improves the securement of the anti-reversal electrode stack after installation, but also increases the difficulty of installing the anti-reversal electrode stack.

[0018] (3) The present invention sets a motor to drive the screw to rotate, so that the bottom block moves along the screw, so that the bottom block drives the moving plate to move, and the moving plate drives the anti-reversing electrode stack to move to the outside or inside of the device, so that when the device is in use, there is no need to fix the anti-reversing electrode stack to the inside of the device by bolts. Therefore, when performing maintenance or inspection of the device, there is no need to remove the bolts, which further reduces the difficulty of maintenance and inspection of the anti-reversing electrode stack and further improves the maintenance and inspection efficiency of the anti-reversing electrode stack.

[0019] (4) In addition, the present invention rotates the screw rod so that the bottom block can drive the movable plate to move to the inside and outside of the shell, so there is no need for personnel to manually move the movable plate supporting the anti-reversing electrode stack, thereby reducing the difficulty of removing the anti-reversing electrode stack and improving the efficiency of removing the anti-reversing electrode stack, further reducing the difficulty of maintaining and repairing the anti-reversing electrode stack and further improving the efficiency of maintaining and repairing the anti-reversing electrode stack. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is one of the three-dimensional diagrams of the present invention;

[0021] Figure 2 This is the second stereogram of the present invention;

[0022] Figure 3 This is the third stereogram of the present invention;

[0023] Figure 4 This is the fourth stereogram of the present invention;

[0024] Figure 5 This is one of the three-dimensional images after the present invention is opened;

[0025] Figure 6 This is the second stereoscopic view of the present invention after opening;

[0026] Figure 7 A perspective view of a housing member of the present invention;

[0027] Figure 8 is a three-dimensional diagram of the heat sink of the present invention;

[0028] Figure 9 A perspective view of a moving part of the present invention;

[0029] Figure 10 is a cross-sectional view of the movable plate of the present invention;

[0030] Figure 11 A three-dimensional diagram of the battery stack of the present invention;

[0031] In the figure: 1. Shell; 11. Outer shell; 12. Inner cavity; 13. Screw; 14. Side frame; 15. Bolt hole; 16. Connecting plate; 17. Motor; 2. Moving part; 21. End plate; 22. Through hole; 23. Limiting plate; 24. Return spring; 25. Bottom block; 26. Moving plate; 27. Top groove; 28. Baffle; 3. Heat sink; 31. Heat sink; 32. Liquid guide tube; 4. Anti-reverse polarity stack; 41. Bipolar plate; 42. Anti-reverse polarity membrane electrode; 43. Card. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0033] See also Figures 1-11 As shown, the present invention provides the following technical solutions:

[0034] A fuel cell stack based on an anti-reversal membrane electrode, the fuel cell stack including an anti-reversal stack component 4. Furthermore, in the present invention, to protect the anti-reversal stack component 4, the fuel cell stack further includes a detachably connected housing component 1 and a movable component 2, wherein a space for accommodating a plurality of anti-reversal stack components 4 is formed between the housing component 1 and the movable component 2.

[0035] In addition, in the present invention, in order to facilitate the replacement of the anti-reversal electrode stack 4, it is not necessary to disassemble all the anti-reversal electrode stacks 4 as a whole to locate the damaged anti-reversal electrode stack 4. Figures 9-11 As shown, the top of the moving part 2 is sunken along its own length direction to form a top groove 27, and a baffle 28 is fixedly connected inside the top groove 27. The bottom of the anti-reverse polarity stack 4 is symmetrically fixedly connected to two clamping plates 43, and the clamping plates 43 are provided with grooves matching the baffle 28.

[0036] In this embodiment, before a person uses the device, the shell part 1 is fixed to the position required by the person. After the shell part 1 is fixed, multiple anti-reverse pole stacks 4 are taken and placed on top of the moving part 2, so that the card plate 43 at the bottom of the anti-reverse pole stack 4 is engaged with the top groove 27 on the moving part 2, and the baffle 28 is engaged with the groove on the card plate 43, so that the anti-reverse pole stack 4 is fixed on the moving part 2, and the moving part 2 is pushed to move the moving part 2 into the shell part 1, and then the corresponding cables and gas pipelines are connected to the shell part 1 and the moving part 2. The device generates electricity through the cooperation of the anti-reverse pole stack 4. When one of the anti-reverse pole stack 4 inside the device is damaged, the device stops working and pulls the moving part 2 to move relative to the shell part 1, so that the moving part 2 moves to the outside of the shell part 1, and multiple anti-reverse pole stacks 4 move to the outside of the shell part 1. The anti-reverse pole stack 4 is pulled to make the anti-reverse pole stack 4 drive the card plate 43 to move, and then the card plate 43 is separated from the baffle 28, and then the card plate 43 is pulled to separate from the top groove 27, and the corresponding damaged anti-reverse pole stack 4 can be disassembled for replacement.

[0037] After the anti-reversal electrode stack 4 is connected in series and mounted on the moving part 2, in order to position and fix the anti-reversal electrode stack 4 and make the anti-reversal electrode stack 4 more secure after installation, as shown in FIG. Figure 5-Figure 6 、 Figure 9 As shown, both sides of the movable part 2 are symmetrically connected to the limiting plate 23, and the limiting plate 23 protrudes outward toward one side of the anti-reverse polarity stack 4 to form a bulge, and a return spring 24 is installed on the limit plate 23, and the two free ends of the return spring 24 are fixedly connected to the movable part 2 and the limiting plate 23 respectively.

[0038] In this embodiment, a plurality of anti-reversal electrode stacks 4 are placed above the moving part 2, so that the clamping plate 43 at the bottom of the anti-reversal electrode stack 4 is engaged with the top groove 27 on the moving part 2, and the baffle 28 is engaged with the groove on the clamping plate 43, so that the anti-reversal electrode stack 4 is fixed on the moving part 2, and the limit plate 23 is pulled by the reset spring 24 to rotate the limit plate 23 around the moving part 2 until the limit plate 23 contacts the plurality of anti-reversal electrode stacks 4, so that the plurality of anti-reversal electrode stacks 4 are more firmly fixed. When one of the anti-reversal electrode stacks 4 is damaged, the device stops working. Pull the limit plate 23 to rotate the limit plate 23 around the movable part 2 until the limit plate 23 is separated from the anti-reverse pole stack 4, pull the movable part 2 to move relative to the shell part 1, move the movable part 2 to the outside of the shell part 1, move multiple anti-reverse pole stacks 4 to the outside of the shell part 1, pull the anti-reverse pole stack 4 to make the anti-reverse pole stack 4 drive the card plate 43 to move, and then separate the card plate 43 from the baffle 28, and then pull the card plate 43 to separate from the top groove 27, so that the corresponding damaged anti-reverse pole stack 4 can be disassembled, and then the replacement of the anti-reverse pole stack 4 can be completed according to the above steps.

[0039] In addition, in the present invention, how the housing 1 is protected against the counter electrode stack 4 is discussed. Figure 1-Figure 5 、 Figure 7 As shown, the housing 1 includes an outer shell 11 , one side of the outer shell 11 is open to form an inner cavity 12 , and a connecting plate 16 for connecting cables is fixedly connected to one side of the outer shell 11 .

[0040] In this embodiment, the shell 11 is fixed at the position required by the personnel. After the shell 11 is fixed, multiple anti-reversal pole stack components 4 are taken and fixed above the moving part 2, so that the clamping plate 43 at the bottom of the anti-reversal pole stack component 4 is engaged with the top groove 27 on the moving part 2, and the baffle 28 is engaged with the groove on the clamping plate 43, so that the anti-reversal pole stack component 4 is fixed on the moving part 2, and the moving part 2 is pushed to move the moving part 2 into the inner cavity 12 inside the shell 11, and then the corresponding cables and gas pipelines are connected to the shell part 1 and the moving part 2, and the anti-reversal pole stack component 4 works in coordination, so that the device generates electricity.

[0041] Furthermore, when the device is in use, in order to prevent the device from malfunctioning or causing other problems due to shaking, the housing 11 needs to be fixed. As to how to fix the housing 11, the present invention provides the following embodiments, such as Figure 1-Figure 7 As shown, a side frame 14 is fixedly connected to the outer side of the housing 11 , and a through-type bolt hole 15 is opened on the side frame 14 .

[0042] In this embodiment, when personnel need to fix the shell 11, the shell 11 is placed at the position where it needs to be fixed. After the shell 11 is fixed, the bolts are passed through the bolt holes 15 on the side frame 14, and the bolts are rotated to move the bolts relative to the side frame 14 until the bolts hit the side frame 14, thereby fixing the side frame 14 and then fixing the shell 11. After the shell 11 is fixed, multiple anti-reverse pole stack components 4 are fixed above the moving component 2, so that the card plate 43 at the bottom of the anti-reverse pole stack component 4 is engaged with the top groove 27 on the moving component 2, and the baffle 28 is engaged with the groove on the card plate 43, so that the anti-reverse pole stack component 4 is fixed on the moving component 2, and the moving component 2 is pushed to move the moving component 2 into the inner cavity 12 inside the shell 11, and then the corresponding cables and gas pipelines are connected to the shell component 1 and the moving component 2, and the anti-reverse pole stack component 4 works in coordination, so that the device generates electricity.

[0043] Specifically, in one embodiment, regarding the above-mentioned moving member 2, as Figures 1-6 、 Figure 9-10 As shown, the moving member 2 includes an end plate 21 , a moving plate 26 is fixedly connected to the side of the end plate 21 facing the inner cavity 12 , a top groove 27 is formed on the top of the moving plate 26 , and a through hole 22 is opened on the end plate 21 .

[0044] In this embodiment, the movable plate 26 is supported by the end plate 21, and the movable plate 26 in the top groove 27 on the movable plate 26 is engaged with the clamping plate 43 on the anti-reversing pole stack 4, so as to support and fix multiple anti-reversing pole stacks 4. When the anti-reversing pole stack 4 needs to be moved into the inner cavity 12, the end plate 21 is moved so that the end plate 21 drives the movable plate 26 to move, so that the movable plate 26 drives the anti-reversing pole stack 4 to move into the inner cavity 12. When the anti-reversing pole stack 4 needs to be moved to the outside of the inner cavity 12, the end plate 21 is moved so that the end plate 21 drives the movable plate 26 to move, so that the movable plate 26 drives the anti-reversing pole stack 4 to move to the outside of the inner cavity 12.

[0045] In addition, in the present invention, after a plurality of anti-reversal electrode stacks 4 are mounted on the movable plate 26, in order to facilitate the movable plate 26 to move the anti-reversal electrode stacks 4 to the outside of the device for inspection and replacement, as shown in FIG. Figure 9 and Figure 7 As shown, two screw rods 13 are symmetrically connected to the inner cavity 12 for rotation, and two bottom blocks 25 are symmetrically fixedly connected to the bottom of the movable plate 26 , and the bottom blocks 25 are screwed together and connected to the screw rods 13 .

[0046] In this embodiment, when it is necessary to drive the movable plate 26 to move, the screw rod 13 is rotated inside the inner cavity 12, so that the bottom block 25 moves along the screw rod 13, so that the bottom block 25 drives the movable plate 26 to move, and then the movable plate 26 drives the anti-reversal electrode stack 4 to move, so that the anti-reversal electrode stack 4 moves to the inside or outside of the device.

[0047] Furthermore, in the present invention, regarding how the screw rod 13 rotates, as shown in FIG. Figures 1-4 and Figure 7 As shown, a motor 17 is fixedly connected to the outside of the housing 11 , and an output end of the motor 17 is connected to the screw rod 13 .

[0048] In this embodiment, when the screw rod 13 needs to be driven to rotate, the motor 17 is operated to drive the screw rod 13 to rotate, so that the bottom block 25 can easily drive the movable plate 26 to move.

[0049] Specifically, in one embodiment, how the anti-reverse polarity stack 4 works is as follows: Figure 5 、 Figure 11 As shown, the anti-reverse polarity stack 4 includes two symmetrically arranged bipolar plates 41 , an anti-reverse polarity membrane electrode 42 is installed between the two bipolar plates 41 , and the top of the clamping plate 43 is fixedly connected to the bottom of the bipolar plates 41 and the anti-reverse polarity membrane electrode 42 .

[0050] In this embodiment, when the device is working, the bipolar plate 41 and the anti-reversal electrode membrane 42 cooperate to generate electricity.

[0051] Moreover, when the device is working, in order to assist the device in dissipating heat, such as Figure 1-Figure 3 As shown, a heat sink 3 for dissipating heat is fixedly connected to the top of the housing 11 , and a liquid infusion channel for conveying heat-conducting liquid along a preset path is formed on the heat sink 3 .

[0052] In this embodiment, when the device is working, the pipe for conveying the thermal fluid is connected to the heat sink 3, and the thermal fluid is conveyed through the fluid delivery channel, thereby assisting the device in heat dissipation, thereby improving the heat dissipation efficiency of the device.

[0053] In addition, in the present invention, regarding the above-mentioned heat sink 3, as Figure 8 As shown, the heat sink 3 includes a heat sink 31 with a cavity formed therein, and two liquid guide tubes 32 communicating with the cavity are fixedly connected to the heat sink 31 .

[0054] In this embodiment, the pipe for transporting the heat transfer fluid is connected to two fluid conduits 32. The heat transfer fluid is input into the cavity inside the heat sink 31 through one of the fluid conduits 32. The heat of the device is absorbed by the heat sink 31, and the heat exchange fluid with increased temperature is discharged to the outside through the other fluid conduit 32 for heat dissipation, thereby improving the heat dissipation efficiency of the device.

[0055] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A fuel cell stack based on an anti-reverse polarity membrane electrode, characterized in that: The invention comprises an anti-reversal electrode stack component (4), a detachably connected housing component (1) and a movable component (2); a space for accommodating a plurality of anti-reversal electrode stack components (4) is formed between the housing component (1) and the movable component (2); the top of the movable component (2) is recessed along its own length direction to form a top groove (27); a baffle (28) is fixedly connected inside the top groove (27); two card plates (43) are symmetrically fixedly connected to the bottom of the anti-reversal electrode stack component (4); and a groove matching the baffle (28) is provided on the card plate (43).

2. A fuel cell stack based on an anti-reverse polarity membrane electrode according to claim 1, characterized in that: Both symmetrical sides of the moving part (2) are rotatably connected to the limiting plate (23), and the limiting plate (23) protrudes outwards toward one side of the anti-reverse polarity stack (4) to form a protrusion. A return spring (24) is installed on the limit plate (23), and the two free ends of the return spring (24) are fixedly connected to the moving part (2) and the limiting plate (23) respectively.

3. A fuel cell stack based on an anti-reverse polarity membrane electrode according to claim 2, characterized in that: The housing (1) comprises an outer shell (11), one side of the outer shell (11) is open to form an inner cavity (12), and one side of the outer shell (11) is fixedly connected to a connecting plate (16) for connecting cables.

4. A fuel cell stack based on an anti-reverse polarity membrane electrode according to claim 3, characterized in that: A side frame (14) is fixedly connected to the outer side of the housing (11), and a through-type bolt hole (15) is provided on the side frame (14).

5. A fuel cell stack based on an anti-reverse polarity membrane electrode according to claim 3 or 4, characterized in that: The movable member (2) comprises an end plate (21), a movable plate (26) is fixedly connected to the side of the end plate (21) facing the inner cavity (12), the top groove (27) is formed on the top of the movable plate (26), and a through hole (22) is provided on the end plate (21).

6. A fuel cell stack based on an anti-reverse polarity membrane electrode according to claim 5, characterized in that: Two screw rods (13) are symmetrically connected to the inner cavity (12) for rotation, and two bottom blocks (25) are symmetrically fixedly connected to the bottom of the movable plate (26), and the bottom blocks (25) are screwed and connected to the screw rods (13).

7. A fuel cell stack based on an anti-reverse polarity membrane electrode according to claim 6, characterized in that: A motor (17) is fixedly connected to the outside of the housing (11), and an output end of the motor (17) is connected to the screw rod (13).

8. The fuel cell stack based on an anti-reverse polarity membrane electrode according to claim 1, characterized in that: The anti-reverse polarity stack (4) comprises two symmetrically arranged bipolar plates (41), an anti-reverse polarity membrane electrode (42) is installed between the two bipolar plates (41), and the top of the clamping plate (43) is fixedly connected to the bottom of the bipolar plates (41) and the anti-reverse polarity membrane electrode (42).

9. A fuel cell stack based on an anti-reverse polarity membrane electrode according to claim 3 or 4, characterized in that: A heat sink (3) for dissipating heat is fixedly connected to the top of the housing (11), and a liquid infusion channel for conveying heat-conducting liquid along a preset path is formed on the heat sink (3).

10. A fuel cell stack based on an anti-reverse polarity membrane electrode according to claim 9, characterized in that: The heat sink (3) comprises a heat sink (31) with a cavity formed therein, and two liquid guide tubes (32) communicating with the cavity are fixedly connected to the heat sink (31).

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