Hydrogen fuel cell bipolar plate with convenient installation assembly and installation method

Abstract

The invention discloses a hydrogen fuel cell bipolar plate with a convenient installation assembly and an installation method, which are applied to the technical field of hydrogen fuel cell bipolar plates, and the technical scheme is characterized in that the hydrogen fuel cell bipolar plate comprises an anode plate, a cathode plate and a membrane electrode; each of the anode plate and the cathode plate comprises a base body and inclined guide blocks, the inclined guide blocks are symmetrically and fixedly connected to two sides of the base body in an outward expanding and inclined manner, a positioning fixing block parallel to the base body is fixedly connected to each inclined guide block, and a positioning interlocking structure is arranged on each positioning fixing block; the membrane electrode comprises a base membrane part and self-stretching blocks which are symmetrically and fixedly connected to the two sides of the base membrane part in a protruding mode and are of a polygonal structure, and a base body is provided with self-stretching grooves matched with the self-stretching blocks; the invention has the technical effects of simple structure and convenience in installation.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen fuel cell bipolar plates, and particularly relates to a hydrogen fuel cell bipolar plate with a convenient installation component and an installation method. Background Art

[0002] Due to its wide sources, clean and pollution-free, convenient storage and transportation, high utilization rate and other characteristics, hydrogen energy is regarded as the most promising secondary energy source in the 21st century. The utilization of hydrogen energy is one of the important ways to achieve carbon neutrality. A proton exchange membrane fuel cell is an energy conversion device that directly converts chemical energy into hydrogen energy. It has the characteristics of high energy conversion rate, high power density, low noise, low radiation, wide application range, etc., and is the core way of hydrogen energy application. As one of the core components of a proton exchange membrane fuel cell, the bipolar plate plays roles such as supporting the membrane electrode, providing fluid channels, conducting electrons, and dissipating reaction heat.

[0003] Currently, a Chinese invention with the publication number CN110571447B discloses a fuel cell integrated metal bipolar plate assembly structure, which includes an anode plate, a cathode plate, and a membrane electrode; both the anode plate and the cathode plate include a plate flow field area structure and a plate peripheral structure; the membrane electrode is provided with membrane electrode positioning holes, and the plate peripheral structures of the anode plate and the cathode plate are respectively provided with a membrane electrode anode-side positioning post and a membrane electrode cathode-side positioning post that cooperate with them; the membrane electrode anode-side positioning post and the membrane electrode cathode-side positioning post are respectively provided with a cooperating card slot and a snap protrusion, realizing the interlocking between the anode plate and the cathode plate, and clamping the membrane electrode by the anode plate and the cathode plate; the plate peripheral structures of the anode plate and the cathode plate are respectively provided with a cooperating component positioning hole and a component positioning post; The existing invention realizes the positioning between the anode plate, the cathode plate and the membrane electrode by setting the membrane electrode anode-side positioning post and the membrane electrode cathode-side positioning post, and realizes the interlocking between the anode plate and the cathode plate through the card slot and the snap protrusion. However, when installing the bipolar plate, this invention needs to align the positioning posts and positioning holes, as well as the card slot and the snap protrusion to achieve assembly. The structure is complex, the installation is cumbersome and the installation efficiency is not high, so there is a need for improvement. Summary of the Invention

[0004] The first object of the present invention is to provide a hydrogen fuel cell bipolar plate with a convenient installation component, and its advantage is simple structure and convenient installation.

[0005] The above technical object of the present invention is achieved through the following technical solutions: A hydrogen fuel cell bipolar plate with a convenient installation component, including an anode plate, a cathode plate, and a membrane electrode; both the anode plate and the cathode plate include a substrate and inclined guiding blocks symmetrically and fixedly connected to both sides of the substrate in an outwardly expanding manner. A positioning and fixing block parallel to the substrate is fixedly connected to the inclined guiding block, and a positioning and interlocking structure is provided on the positioning and fixing block. The membrane electrode includes a base film portion and self-stretching blocks symmetrically and fixedly connected to both sides of the base film portion and having a polygonal structure. Self-stretching grooves matching the self-stretching blocks are provided on the substrate.

[0006] The present invention is further configured as: The positioning and interlocking structure includes at least one frustum-shaped positioning block fixedly connected to the bottom of the positioning and fixing block along the vertical direction and having an inverted frustum shape, and a frustum-shaped positioning groove correspondingly opened directly above the frustum-shaped positioning block on the positioning and fixing block and having the same shape as the frustum-shaped positioning block.

[0007] The present invention is further configured as: A first positioning adsorption magnet is coaxially and fixedly connected to the bottom of the frustum-shaped positioning block, and a second positioning adsorption magnet is coaxially and fixedly connected to the bottom of the frustum-shaped positioning groove. The first positioning adsorption magnet and the second positioning adsorption magnet are arranged with the same polarity.

[0008] The present invention is further configured as: The repulsive force between adjacent first positioning adsorption magnets and second positioning adsorption magnets is not greater than 1 / 3 of the self-weight of the anode plate or the lead plate.

[0009] The present invention is further configured as: Mesh-shaped or serrated anti-slip and interlocking textures are provided on the conical side wall of the frustum-shaped positioning block and the conical groove wall of the frustum-shaped positioning groove. When the frustum-shaped positioning block is inserted into the frustum-shaped positioning groove, the friction between the two is increased to achieve interlocking, so as to prevent relative displacement between the anode plate and the cathode plate.

[0010] The present invention is further configured as: The self-stretching block includes a stretching portion fixedly connected to the bottom surface of the base film portion and a first abutting portion fixedly connected to the top surface of the base film portion and having a square structure. Second abutting portions for abutting against the first abutting portion are symmetrically and fixedly connected to the bottom surface of the substrate.

[0011] The present invention is further configured as: The stretching portion has a triangular structure.

[0012] The present invention is further configured as: The surfaces of the stretching portion and the self-stretching groove are coated with a polytetrafluoroethylene self-lubricating coating.

[0013] The present invention is further configured as: Handling handles are integrally formed on both sides of the positioning and fixing block by injection molding.

[0014] The second object of the present invention is to provide an installation method for a hydrogen fuel cell bipolar plate with a built-in convenient installation component, which has the advantages of simple structure and convenient installation.

[0015] The above technical object of the present invention is achieved through the following technical solutions: an installation method for a hydrogen fuel cell bipolar plate with a built-in convenient installation component, applying a hydrogen fuel cell bipolar plate with a built-in convenient installation component as described in any one of the above technical solutions; including: Step 1, first lay the membrane electrode on the cathode plate, and place the self-stretching block of the membrane electrode in the self-stretching groove, and no alignment is required during the placement process; Step 2, then cover the anode plate on the cathode plate, and during the covering process, the inclined guiding blocks of the cathode plate and the anode plate are fitted to achieve preliminary positioning; Step 3, due to the gravity of the anode plate, the anode plate automatically aligns with the cathode plate along the inclined guiding block. At the same time, the positioning interlocking structure provided on the positioning fixing block enables the anode plate and the lead plate to achieve precise positioning and locking; Step 4, repeat steps 1-3 to stack the membrane electrode and the cathode plate on the anode plate respectively, and repeat this process.

[0016] In summary, the present invention has the following beneficial effects: 1. The inclined guiding blocks are arranged on the anode plate and the cathode plate, and the positioning and interlocking components are arranged on the inclined guiding blocks. At the same time, the self-stretching blocks with polygonal structures are arranged at both ends of the base film part of the membrane electrode. When assembling, first place the membrane electrode on the cathode plate. In this process, only need to place the self-stretching blocks in the self-stretching grooves without alignment. Due to the gravity of the self-stretching blocks and the inclined contact between the self-stretching blocks and the self-stretching grooves, the membrane electrode can be laid flat on the substrate of the anode plate or the cathode plate without alignment. Subsequently, when positioning and placing the anode plate on the cathode plate, first realize the preliminary positioning between the anode plate and the cathode plate through the inclined guiding blocks, and realize the precise positioning between the anode plate and the cathode plate by combining the frustum positioning block and the frustum positioning groove. The first positioning adsorption magnet and the second positioning adsorption magnet with opposite polarities are respectively arranged at the bottom of the frustum positioning block and the bottom of the frustum positioning groove, and the repulsive force is set to be not greater than 1 / 3 of the self-weight of the anode plate or the cathode plate. When the frustum positioning block enters the frustum positioning groove, the repulsive force between the first positioning adsorption magnet and the second positioning adsorption magnet hinders the descending speed of the upper plate but does not affect the final fitting state of the anode plate and the cathode plate. On the one hand, by delaying the falling speed, there is enough time for the anode plate and the cathode plate to align themselves, improving the alignment accuracy. On the other hand, since the second abutting part for abutting against the first abutting part is arranged on the bottom surface of the substrate, the second abutting part has enough time to abut against the first abutting part, so that the membrane electrode is tightened and the accuracy between the membrane electrode and the anode plate and the cathode plate is improved. The structure is simple and the installation efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the overall structural sectional view of this embodiment; Figure 2 is Figure 1 the enlarged schematic view of part A of Figure 3 is the structural schematic view of the anode plate or the cathode plate of this embodiment; Figure 4 is the structural schematic view of the membrane electrode of this embodiment.

[0018] Reference numerals: 1, anode plate; 11, substrate; 12, inclined guiding block; 13, positioning and fixing block; 14, positioning and interlocking structure; 141, frustum positioning block; 142, frustum positioning groove; 143, first positioning adsorption magnet; 144, second positioning adsorption magnet; 2, cathode plate; 3, membrane electrode; 31, self-stretching block; 311, stretching part; 312, first abutting part; 313, second abutting part; 32, self-stretching groove; 33, base film part. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The present invention will be further described in detail below with reference to the accompanying drawings.

[0020] Example 1: Reference Figures 1 to 4 , a hydrogen fuel cell bipolar plate with a convenient installation component, comprising an anode plate 1, a cathode plate 2 and a membrane electrode 3. Both the anode plate 1 and the cathode plate 2 include a substrate 11 and inclined guide blocks 12 symmetrically and fixedly connected to both sides of the substrate 11 and extending outward. A positioning and fixing block 13 parallel to the substrate 11 is fixedly connected to the inclined guide block 12. A positioning and interlocking structure 14 is provided on the positioning and fixing block 13 to achieve precise positioning and locking between the anode plate 1 and the cathode plate 2. The membrane electrode 3 includes a base film part 33 and self-stretching blocks 31 symmetrically and convexly fixedly connected to both sides of the base film part 33 and having a polygonal structure. A self-stretching groove 32 matching the self-stretching block 31 is formed on the substrate 11. When assembling, first place the membrane electrode 3 on the cathode plate 2. In this process, only need to place the self-stretching block 31 in the self-stretching groove 32 without alignment. Due to the gravity of the self-stretching block 31 and the inclined contact between the self-stretching block 31 and the self-stretching groove 32, the membrane electrode 3 can be smoothly laid on the substrate 11 of the anode plate 1 or the cathode plate 2 without alignment. Handling handles are integrally formed on both sides of the positioning and fixing block 13 by injection molding, which makes it more convenient to handle the anode plate 1 and the cathode plate 2 through the handling handles.

[0021] Reference Figures 1 to 2, Specifically, the positioning and interlocking structure 14 includes at least one frustum-shaped positioning block 141 fixedly connected to the bottom of the positioning and fixing block 13 along the vertical direction and having an inverted frustum shape, and a frustum-shaped positioning groove 142 correspondingly formed above the frustum-shaped positioning block 141 on the positioning and fixing block 13 and having the same shape as the frustum-shaped positioning block 141. A first positioning and attracting magnet 143 is fixedly connected coaxially to the bottom of the frustum-shaped positioning block 141, and a second positioning and attracting magnet 144 is fixedly connected coaxially to the bottom of the frustum-shaped positioning groove 142. The first positioning and attracting magnet 143 and the second positioning and attracting magnet 144 are arranged with the same polarity, and the repulsive force between the adjacent first positioning and attracting magnet 143 and the second positioning and attracting magnet 144 is not greater than 1 / 3 of the self-weight of the anode plate 1 or the lead plate. When the anode plate 1 is positioned and placed on the cathode plate 2, first, the preliminary positioning between the anode plate 1 and the cathode plate 2 is realized through the inclined guiding block 12. The precise positioning between the anode plate 1 and the cathode plate 2 is realized by combining the frustum-shaped positioning block 141 and the frustum-shaped positioning groove 142. By respectively providing the first positioning and attracting magnet 143 and the second positioning and attracting magnet 144 with opposite polarities at the bottom of the frustum-shaped positioning block 141 and the bottom of the frustum-shaped positioning groove 142 and setting the repulsive force not greater than 1 / 3 of the self-weight of the anode plate 1 or the cathode plate 2, when the frustum-shaped positioning block 141 enters the frustum-shaped positioning groove 142, the repulsive force between the first positioning and attracting magnet 143 and the second positioning and attracting magnet 144 hinders the descending speed of the upper plate but does not affect the final fitting state of the anode plate 1 and the cathode plate 2. On the one hand, by delaying the falling speed, sufficient time is provided for the anode plate 1 and the cathode plate 2 to perform self-alignment, improving the alignment accuracy. On the other hand, since the second abutting portion 313 for abutting against the first abutting portion 312 is provided on the bottom surface of the substrate 11, the second abutting portion 313 has sufficient time to abut against the first abutting portion 312, so that the membrane electrode 3 is tightened and the accuracy between the membrane electrode 3, the anode plate 1, and the cathode plate 2 is improved. The structure is simple and the installation efficiency is high.

[0022] Specifically, grid-shaped or serrated anti-slip and interlocking textures are provided on the conical side wall of the frustum-shaped positioning block 141 and the conical groove wall of the frustum-shaped positioning groove 142. When the frustum-shaped positioning block 141 is inserted into the frustum-shaped positioning groove 142, the friction force between the two is increased to achieve interlocking, so as to prevent relative displacement between the anode plate 1 and the cathode plate 2.

[0023] Reference Figures 3 to 4, specifically, the self-stretching block 31 includes a stretching portion 311 protruding and fixedly connected to the bottom surface of the base film portion 33, and a first abutting portion 312 protruding and fixedly connected to the top surface of the base film portion 33 and having a square structure. A second abutting portion 313 for abutting against the first abutting portion 312 is symmetrically and fixedly connected to the bottom surface of the base body 11. The stretching portion 311 and the surface of the self-stretching groove 32 are coated with a polytetrafluoroethylene self-lubricating coating. By coating the self-lubricating coating, the smoothness of the alignment process of the membrane electrode 3 is ensured, and the normal use of the hydrogen fuel cell is prevented from being affected due to the inability to align the membrane electrode 3. In this embodiment, the stretching portion 311 has a triangular structure.

[0024] Embodiment 2: An installation method for a bipolar plate of a hydrogen fuel cell with a built-in convenient installation component, which applies a bipolar plate of a hydrogen fuel cell with a built-in convenient installation component as shown in Embodiment 1, includes: Step 1: First, lay the membrane electrode 3 on the cathode plate 2, and place the self-stretching block 31 of the membrane electrode 3 in the self-stretching groove 32. No alignment is required during the placement process. Step 2: Subsequently, cover the anode plate 1 on the cathode plate 2. During the covering process, the inclined guiding blocks 12 of the cathode plate 2 and the anode plate 1 are fitted to achieve preliminary positioning. Step 3: Due to the gravitational force of the anode plate 1, the anode plate 1 automatically aligns with the cathode plate 2 along the inclined guiding block 12. At the same time, the positioning interlocking structure 14 provided on the positioning and fixing block 13 enables precise positioning and locking of the anode plate 1 and the lead plate. Step 4: Repeat Steps 1-3 to stack the membrane electrode 3 and the cathode plate 2 on the anode plate 1 respectively, and so on.

[0025] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make creatively contributive modifications to this embodiment according to needs after reading this specification, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A hydrogen fuel cell bipolar plate with a convenient installation assembly, comprising an anode plate (1), a cathode plate (2) and a membrane electrode (3); characterized in that: The anode plate (1) and the cathode plate (2) both comprise a base (11) and an inclined guide block (12) which is outwardly expanded and obliquely symmetrically fixedly connected to both sides of the base (11); the inclined guide block (12) is fixedly connected to a positioning fixing block (13) arranged parallel to the base (11); the positioning fixing block (13) is provided with a positioning interlocking structure (14); the membrane electrode (3) comprises a base membrane portion (33) and a self-stretching block (31) which is protruding and symmetrically fixedly connected to both sides of the base membrane portion (33) and has a polygonal structure; the base (11) is provided with a self-stretching groove (32) which cooperates with the self-stretching block (31).

2. A hydrogen fuel cell bipolar plate with a convenient installation assembly according to claim 1, characterized in that: The positioning interlocking structure (14) comprises at least one frustum positioning block (141) fixedly connected to the bottom of the positioning fixing block (13) along the vertical direction and having an inverted frustum-shaped structure, and a frustum positioning groove (142) correspondingly opened on the positioning fixing block (13) and located directly above the frustum positioning block (141) and having the same shape as the frustum positioning block (141).

3. A hydrogen fuel cell bipolar plate with a convenient installation assembly according to claim 2, characterized in that: A first positioning adsorption magnet (143) is coaxially fixedly connected to the bottom of the frustum positioning block (141), and a second positioning adsorption magnet (144) is coaxially fixedly connected to the bottom of the frustum positioning groove (142), wherein the first positioning adsorption magnet (143) and the second positioning adsorption magnet (144) are arranged with the same polarity.

4. A hydrogen fuel cell bipolar plate with a convenient installation assembly according to claim 3, characterized in that: The repulsive force between the adjacent first positioning adsorption magnets (143) and the second positioning adsorption magnets (144) is no greater than 1 / 3 of the self-weight of the anode plate (1) or the lead plate.

5. A hydrogen fuel cell bipolar plate with a convenient installation assembly according to claim 2, characterized in that: The conical side wall of the frustum positioning block (141) and the conical groove wall surface of the frustum positioning groove (142) are both provided with a grid-like or sawtooth-like anti-slip interlocking texture, and when the frustum positioning block (141) is inserted into the frustum positioning groove (142), the friction between the two is increased to achieve interlocking, thereby avoiding relative displacement between the anode plate (1) and the cathode plate (2).

6. A hydrogen fuel cell bipolar plate with a self-contained convenient installation assembly according to claim 1, characterized in that: The self-stretching block (31) comprises a stretching portion (311) protruding and fixedly connected to the bottom surface of the base film portion (33) and a first abutting portion (312) protruding and fixedly connected to the top surface of the base film portion (33) and having a square structure, and a second abutting portion (313) for abutting against the first abutting portion (312) is symmetrically fixedly connected to the bottom surface of the base body (11).

7. A hydrogen fuel cell bipolar plate with a self-contained convenient installation assembly according to claim 6, characterized in that: The stretching portion (311) has a triangular structure.

8. A hydrogen fuel cell bipolar plate with a self-contained convenient installation assembly according to claim 6, characterized in that: The surfaces of the stretching portion (311) and the self-stretching groove (32) are coated with a polytetrafluoroethylene self-lubricating coating.

9. A hydrogen fuel cell bipolar plate with a convenient installation assembly according to claim 2, characterized in that: Carrying handles are integrally formed on both sides of the positioning and fixing block (13) based on injection molding.

10. A method for installing a hydrogen fuel cell bipolar plate with a self-contained convenient installation component, using a hydrogen fuel cell bipolar plate with a self-contained convenient installation component as described in any one of claims 1 to 9 above; characterized in that: include: Step 1: First, lay the membrane electrode (3) on the cathode plate (2), and place the self-stretching block (31) of the membrane electrode (3) in the self-stretching groove (32), and no alignment is required during the placement process; Step 2: Subsequently, the anode plate (1) is covered on the cathode plate (2), and the covering process makes the cathode plate (2) and the inclined guide block (12) of the anode plate (1) fit together to achieve preliminary positioning; Step 3: Due to the gravity of the anode plate (1), the anode plate (1) automatically aligns with the cathode plate (2) along the inclined guide block (12). At the same time, the positioning interlocking structure (14) provided on the positioning fixing block (13) enables the anode plate (1) and the lead plate to be precisely positioned and locked; Step 4: Repeat steps 1-3 to respectively stack the membrane electrode (3) and the cathode plate (2) on the anode plate (1), and repeat this process back and forth.

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