Integrated composite electrode bipolar plate

Abstract

The invention belongs to the technical field of fuel cells, and particularly relates to an integrated composite electrode bipolar plate which comprises an anode plate and a cathode plate, cooling liquid inlets are formed in the middles of the anode plate and the cathode plate, cooling liquid outlets are formed in the centers of the other ends of the anode plate and the cathode plate, vertical grooves are formed in one side of the anode plate and one side of the cathode plate in an array mode, and the vertical grooves are communicated with the anode plate and the cathode plate. Transverse communicating grooves are formed in one side of the anode plate and one side of the cathode plate in an array mode, a distribution mechanism is fixedly connected into the transverse communicating groove close to the cooling liquid inlet, and a flowing mechanism used for controlling flowing of cooling liquid is fixedly connected into the transverse communicating groove of each vertical groove located on the two adjacent sides. The flowing mechanism controls cooling liquid flowing down from the vertical groove to flow to the center of the transverse communicating groove, and the situation that most of the cooling liquid directly flows to the cooling liquid outlet on the lower portion, so that the amount of the cooling liquid in the transverse communicating groove is small, the flowing path of the cooling liquid is short, the cooling efficiency is low, and the cooling effect is poor is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of fuel cells, and in particular relates to an integrated composite electrode bipolar plate. Background Art

[0002] Bipolar plates, also known as current collecting plates, are one of the important components of fuel cells and have the following functions and properties: they separate fuel and oxidant to prevent gas from penetrating; they collect and conduct current with high electrical conductivity; the designed and processed flow channels can evenly distribute gas to the reaction layer of the electrode for electrode reaction; they can dissipate heat to maintain a uniform temperature field in the battery; they are corrosion-resistant; impact- and vibration-resistant; thin; light-weight; low-cost, easy to machine, and suitable for mass production.

[0003] After searching, a Chinese patent with the publication number "CN118073595A" provides a composite bipolar plate for a fuel cell stack. By providing an arc-shaped guide plate and a semicircular connecting groove, the arc-shaped guide plate can guide the coolant entering the semicircular diversion groove, allowing it to enter the semicircular connecting groove and collide with it, slowing the movement of the coolant and performing secondary mixing of the coolant, thereby improving the coolant's heat dissipation effect on the gas. However, the bipolar plate in this patent is vertically arranged inside the battery. The coolant flows from top to bottom. When passing through the arc-shaped guide plate, it flows directly downward from the bottom of the arc-shaped guide plate. The amount of coolant in the middle part of the semicircular connecting groove is relatively small, resulting in poor cooling effect. Summary of the Invention

[0004] The object of the present invention is to provide an integrated composite electrode bipolar plate to solve the problems raised in the above background technology.

[0005] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions: The present invention provides an integrated composite electrode bipolar plate, comprising an anode plate and a cathode plate, wherein one end of the anode plate is provided with a reducing agent inlet, and the other end of the anode plate is provided with a reducing agent outlet, the end of the cathode plate close to the reducing agent inlet is provided with an oxidant inlet, and the other end of the cathode plate is provided with an oxidant outlet, the middle parts of the anode plate and the cathode plate are both provided with a cooling liquid inlet, and the center parts of the other ends of the anode plate and the cathode plate are both provided with a cooling liquid outlet, one side of the anode plate and the cathode plate are both provided with an array of vertical grooves, one side of the anode plate and the cathode plate are both provided with an array of transverse connecting grooves, a distribution mechanism is fixedly connected in the transverse connecting groove close to the cooling liquid inlet, and each of the transverse connecting grooves located on the adjacent two vertical grooves is fixedly connected to a flow mechanism for controlling the flow of cooling liquid.

[0006] Furthermore, the distribution mechanism includes a temporary storage frame fixedly connected to the transverse connecting groove, one side of the temporary storage frame is fixedly connected to the inner wall of the transverse connecting groove, and a flow cavity exists between the other side of the temporary storage frame and the inner wall of the transverse connecting groove. An array of flow outlets is opened above the side of the temporary storage frame close to the flow cavity, and the upper end of the temporary storage frame is connected to the coolant inlet.

[0007] Furthermore, the flow mechanism includes a first baffle plate fixedly connected to the transverse connecting groove, one side of the first baffle plate is close to the vertical groove, the other end of the first baffle plate is located at the center of the transverse connecting groove, the end of the first baffle plate located at the center of the transverse connecting groove is fixedly connected to a second baffle plate, the end of the second baffle plate away from the first baffle plate is close to another adjacent vertical groove, a first semicircular opening is opened at the end of the first baffle plate close to the second baffle plate, a second semicircular opening is opened at the end of the second baffle plate close to the first semicircular opening, a first limiting plate is fixedly connected to the first baffle plate, a second limiting plate is fixedly connected to the second baffle plate, and the first limiting plate and the second limiting plate are respectively located on both sides of the first semicircular opening and the second semicircular opening.

[0008] Furthermore, a rotating shaft is rotatably connected in the transverse connecting groove, a rotating blade is fixedly connected to the position of the rotating shaft above the first semicircular opening, and a stirring blade is fixedly connected to the position of the rotating shaft below the first semicircular opening.

[0009] Furthermore, the first semicircular opening and the second semicircular opening form a circular opening, and the radius of the circular opening is greater than the radius of the rotation axis.

[0010] Furthermore, a first baffle is fixedly connected to a position of the inner wall of the transverse communicating groove close to the second semicircular opening, and a second baffle is fixedly connected to a position of the inner wall of the transverse communicating groove close to the first semicircular opening.

[0011] Furthermore, a side of the first baffle close to the circular opening is arc-shaped, and a side of the second baffle close to the circular opening is arc-shaped.

[0012] Furthermore, both ends of the vertical groove and the horizontal connecting groove are fixedly connected with a guide plate, the other end of the guide plate is fixedly connected to the first blocking plate, and the other end of the guide plate in the adjacent vertical groove is fixedly connected to the second blocking plate.

[0013] Furthermore, the flow cavity is communicated with the vertical groove.

[0014] Furthermore, the outflow port and the vertical groove are staggered, and the outflow port is located between two adjacent vertical grooves.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention evenly distributes the coolant to multiple vertical grooves through the distribution mechanism, preventing the amount of coolant in the vertical grooves at the two ends of the anode plate and the cathode plate far from the coolant inlet from being small, resulting in low heat exchange efficiency and poor cooling efficiency at both ends; The flow mechanism set up controls the coolant flowing down in the vertical groove to flow to the center of the horizontal connecting groove, preventing most of the coolant from flowing directly to the coolant outlet below, resulting in less coolant in the horizontal connecting groove, a shorter coolant flow path, lower cooling efficiency, and poor cooling effect.

[0016] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the cross-sectional structure of the anode plate of the present invention; Figure 3 for Figure 2 A schematic diagram of the front structure of FIG. Figure 4 It is a structural diagram of the distribution mechanism of the present invention; Figure 5 It is a schematic diagram of the partial structure of the flow mechanism of the present invention.

[0019] In the figure: 1. Anode plate; 2. Cathode plate; 3. Reductant inlet; 4. Reductant outlet; 5. Oxidant inlet; 6. Oxidant outlet; 7. Coolant inlet; 8. Coolant outlet; 9. Vertical groove; 10. Horizontal connecting groove; 11. Distribution mechanism; 12. Flow mechanism; 13. Temporary storage frame; 14. Flow chamber; 15. Outlet; 16. First baffle plate; 17. Second baffle plate; 18. First semicircular opening; 19. Second semicircular opening; 20. First limiting plate; 21. Second limiting plate; 22. Rotating shaft; 23. Rotating blade; 24. Stirring blade; 25. First baffle plate; 26. Second baffle plate; 27. Guide plate. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described 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 should fall within the scope of protection of the present invention.

[0021] See also Figures 1 to 5 The present invention provides an integrated composite electrode bipolar plate, comprising an anode plate 1 and a cathode plate 2, wherein a reducing agent inlet 3 is provided at one end of the anode plate 1, and a reducing agent outlet 4 is provided at the other end of the anode plate 1, an oxidant inlet 5 is provided at one end of the cathode plate 2 near the reducing agent inlet 3, and an oxidant outlet 6 is provided at the other end of the cathode plate 2, a cooling liquid inlet 7 is provided at the middle portion of the anode plate 1 and the cathode plate 2, a cooling liquid outlet 8 is provided at the center portion of the other end of the anode plate 1 and the cathode plate 2, vertical grooves 9 are arranged in an array on one side of the anode plate 1 and the cathode plate 2, and transverse connecting grooves 10 are arranged in an array on one side of the anode plate 1 and the cathode plate 2, a distribution mechanism 11 is fixedly connected to the transverse connecting groove 10 near the cooling liquid inlet 7, and a flow mechanism 12 for controlling the flow of cooling liquid is fixedly connected to each transverse connecting groove 10 located on both sides of the adjacent vertical grooves 9.

[0022] The cooling liquid is evenly distributed to the multiple vertical grooves 9 by the distribution mechanism 11, so as to prevent the cooling liquid amount in the vertical grooves 9 at both ends of the anode plate 1 and the cathode plate 2 from being small, resulting in low heat exchange efficiency and poor cooling efficiency at both ends; the flow mechanism 12 is provided to control the cooling liquid flowing down in the vertical grooves 9 to flow to the center of the horizontal connecting groove 10, so as to prevent most of the cooling liquid from flowing directly to the cooling liquid outlet 8 below, resulting in a small amount of cooling liquid in the horizontal connecting groove 10, which makes the cooling liquid flow path shorter, the cooling efficiency lower, and the cooling effect poor.

[0023] See also Figure 3 and Figure 4 The distribution mechanism 11 includes a temporary storage frame 13 fixedly connected to the transverse communicating groove 10. One side of the temporary storage frame 13 is fixedly connected to the inner wall of the transverse communicating groove 10. There is a flow cavity 14 between the other side of the temporary storage frame 13 and the inner wall of the transverse communicating groove 10. An array of flow outlets 15 are opened above the side of the temporary storage frame 13 close to the flow cavity 14. The upper end of the temporary storage frame 13 is connected to the coolant inlet 7.

[0024] When the coolant flows in from the coolant inlet 7, it will first flow into the temporary storage frame 13. When the temporary storage frame 13 is full of coolant, the coolant will flow out from the outflow port 15. The height of each outflow port 15 is the same, so the coolant can flow evenly from the outflow port 15 to the flow cavity 14 and then flow into the vertical groove 9, thereby avoiding the situation where the amount of coolant at both ends of the anode plate 1 and the cathode plate 2 is small when the coolant flows in directly from the coolant inlet 7, resulting in poor cooling effect.

[0025] See also Figure 5 The flow mechanism 12 includes a first baffle plate 16 fixedly connected to the transverse connecting groove 10, one side of the first baffle plate 16 is close to the vertical groove 9, and the other end of the first baffle plate 16 is located at the center of the transverse connecting groove 10. The end of the first baffle plate 16 located at the center of the transverse connecting groove 10 is fixedly connected to the second baffle plate 17, and the end of the second baffle plate 17 away from the first baffle plate 16 is close to another adjacent vertical groove 9. A first semicircular opening 18 is opened at one end of the first baffle plate 16 close to the second baffle plate 17, and a second semicircular opening 19 is opened at one end of the second baffle plate 17 close to the first semicircular opening 18. A first limiting plate 20 is fixedly connected to the first baffle plate 16, and a second limiting plate 21 is fixedly connected to the second baffle plate 17. The first limiting plate 20 and the second limiting plate 21 are respectively located on both sides of the first semicircular opening 18 and the second semicircular opening 19.

[0026] See also Figure 3 and Figure 5 A rotating shaft 22 is rotatably connected in the transverse connecting groove 10 , a rotating blade 23 is fixedly connected to the position of the rotating shaft 22 above the first semicircular opening 18 , and a stirring blade 24 is fixedly connected to the position of the rotating shaft 22 below the first semicircular opening 18 .

[0027] When the coolant flowing downward from the top of the vertical groove 9 flows to the transverse connecting groove 10, it will flow into the transverse connecting groove 10 under the guidance of the guide plate 27, and the coolant flows to the first baffle plate 16, and continues to flow to the middle of the transverse connecting groove 10 on the first baffle plate 16. When the coolant flows to the first semicircular opening 18, it will flow downward through the first semicircular opening 18 and the second semicircular opening 19. The coolant flows to the space below the first baffle plate 16 of the transverse connecting groove 10 and continues to flow to the two ends of the transverse connecting groove 10, and will flow into the vertical grooves 9 at both ends. In this process, the flow path of the coolant is extended, and the amount of coolant in the middle position of the transverse connecting groove 10 is large, which improves the cooling efficiency and effect. When the coolant flows from both ends of the transverse connecting groove 10 to the middle, the coolant will drive the rotating blades 23 to rotate, thereby driving the rotating shaft 22 to rotate, and then driving the stirring blades 24 to rotate. The stirring blades 24 stir the coolant, and the coolant at both ends converges above the first baffle plate 16 and the second baffle plate 17 for preliminary mixing, and flows to the stirring blades 24 through the circular opening. The stirring blades 24 stir the converged coolant to make it fully mixed. During the operation of the battery, the temperature of different areas is different, and the temperature of the coolant after heat exchange in different areas is different. Sufficient mixing allows coolants of different temperatures to mix with each other, thereby balancing the overall temperature and avoiding insufficient cooling in local areas, thereby improving the overall cooling effect.

[0028] See also Figure 5 The first semicircular opening 18 and the second semicircular opening 19 form a circular opening, the radius of which is greater than the radius of the rotating shaft 22 , and the circular opening allows the coolant to have space to flow from the top of the transverse connecting groove 10 to the bottom of the transverse connecting groove 10 .

[0029] See also Figure 5 A first baffle 25 is fixedly connected to the position of the inner wall of the transverse communicating groove 10 near the second semicircular opening 19, and a second baffle 26 is fixedly connected to the position of the inner wall of the transverse communicating groove 10 near the first semicircular opening 18. The first baffle 25 and the second baffle 26 have the same function. Taking the first baffle 25 as an example, the first baffle 25 will block the coolant flowing from the second baffle plate 17 to the circular opening, preventing the coolant from flowing to the first baffle plate 16. At the same time, the first baffle 25 and the second baffle 26 have a guiding effect on the flowing coolant, causing the coolant at both ends to rotate at the circular opening, thereby causing the coolant at both ends to be preliminarily mixed, and the rotating coolant provides power to the rotating blade 23, driving the rotating blade 23 to rotate.

[0030] See also Figure 5The first baffle 25 has an arc-shaped side close to the circular opening, and the second baffle 26 has an arc-shaped side close to the circular opening. The first baffle 25 and the second baffle 26 guide the coolant and make the coolant rotate and preliminarily mix at the circular opening.

[0031] See also Figure 3 Both ends of the vertical groove 9 and the horizontal connecting groove 10 are fixedly connected with a guide plate 27, the other end of the guide plate 27 is fixedly connected to the first baffle plate 16, and the other end of the guide plate 27 in the adjacent vertical groove 9 is fixedly connected to the second baffle plate 17. The guide plate 27 can guide the coolant above the vertical groove 9 to the horizontal connecting groove 10, extend the flow path of the coolant, and improve the cooling effect.

[0032] See also Figure 3 The flow cavity 14 is connected to the vertical groove 9. When the coolant flows from the outflow port 15 into the flow cavity 14, it can flow into the vertical groove 9 through the flow cavity 14, thereby performing cooling.

[0033] See also Figure 3 and Figure 4 The outflow port 15 is staggered with the vertical grooves 9. The outflow port 15 is located between two adjacent vertical grooves 9. The coolant flowing out of the outflow port 15 will first flow to the bottom end of the horizontal connecting groove 10, and then diffuse to both ends and flow into the two adjacent vertical grooves 9, so that the coolant flowing in from the coolant inlet 7 can flow more evenly into multiple vertical grooves 9, avoiding the situation where the amount of coolant in the vertical grooves 9 at both ends of the anode plate 1 and the cathode plate 2 is small, which makes the heat exchange efficiency at both ends low and the cooling effect poor.

[0034] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An integrated composite electrode bipolar plate, characterized in that: The invention comprises an anode plate (1) and a cathode plate (2), wherein one end of the anode plate (1) is provided with a reducing agent inlet (3), and the other end of the anode plate (1) is provided with a reducing agent outlet (4), an end of the cathode plate (2) close to the reducing agent inlet (3) is provided with an oxidant inlet (5), and the other end of the cathode plate (2) is provided with an oxidant outlet (6), a cooling liquid inlet (7) is provided in the middle of the anode plate (1) and the cathode plate (2), and a cooling liquid outlet (8) is provided in the center of the other end of the anode plate (1) and the cathode plate (2), a vertical groove (9) is provided in an array on one side of the anode plate (1) and the cathode plate (2), a transverse connecting groove (10) is provided in an array on one side of the anode plate (1) and the cathode plate (2), a distribution mechanism (11) is fixedly connected in the transverse connecting groove (10) close to the cooling liquid inlet (7), and a flow mechanism (12) for controlling the flow of the cooling liquid is fixedly connected in each of the transverse connecting grooves (10) located on the two adjacent vertical grooves (9).

2. The integrated composite electrode bipolar plate according to claim 1, characterized in that: The distribution mechanism (11) includes a temporary storage frame (13) fixedly connected to the transverse connecting groove (10), one side of the temporary storage frame (13) is fixedly connected to the inner wall of the transverse connecting groove (10), a flow cavity (14) is present between the other side of the temporary storage frame (13) and the inner wall of the transverse connecting groove (10), an array of flow outlets (15) are provided above one side of the temporary storage frame (13) close to the flow cavity (14), and the upper end of the temporary storage frame (13) is connected to the coolant inlet (7).

3. The integrated composite electrode bipolar plate according to claim 2, characterized in that: The flow mechanism (12) includes a first baffle plate (16) fixedly connected to the transverse connecting groove (10), one side of the first baffle plate (16) is close to the vertical groove (9), the other end of the first baffle plate (16) is located at the center of the transverse connecting groove (10), the end of the first baffle plate (16) located at the center of the transverse connecting groove (10) is fixedly connected to a second baffle plate (17), the end of the second baffle plate (17) away from the first baffle plate (16) is close to another adjacent vertical groove (9), and the A first semicircular opening (18) is formed at one end of the first baffle plate (16) close to the second baffle plate (17), and a second semicircular opening (19) is formed at one end of the second baffle plate (17) close to the first semicircular opening (18). A first limiting plate (20) is fixedly connected to the first baffle plate (16), and a second limiting plate (21) is fixedly connected to the second baffle plate (17). The first limiting plate (20) and the second limiting plate (21) are respectively located on both sides of the first semicircular opening (18) and the second semicircular opening (19).

4. The integrated composite electrode bipolar plate according to claim 3, characterized in that: A rotating shaft (22) is rotatably connected in the transverse connecting groove (10), a rotating blade (23) is fixedly connected to the rotating shaft (22) at a position above the first semicircular opening (18), and a stirring blade (24) is fixedly connected to the rotating shaft (22) at a position below the first semicircular opening (18).

5. The integrated composite electrode bipolar plate according to claim 3, characterized in that: The first semicircular opening (18) and the second semicircular opening (19) form a circular opening, and the radius of the circular opening is greater than the radius of the rotating shaft (22).

6. The integrated composite electrode bipolar plate according to claim 3, characterized in that: A first baffle (25) is fixedly connected to a position of the inner wall of the transverse connecting groove (10) close to the second semicircular opening (19), and a second baffle (26) is fixedly connected to a position of the inner wall of the transverse connecting groove (10) close to the first semicircular opening (18).

7. The integrated composite electrode bipolar plate according to claim 6, characterized in that: The side of the first baffle (25) close to the circular opening is arc-shaped, and the side of the second baffle (26) close to the circular opening is arc-shaped.

8. The integrated composite electrode bipolar plate according to claim 3, characterized in that: Both ends of the vertical groove (9) intersecting with the transverse connecting groove (10) are fixedly connected to a guide plate (27), the other end of the guide plate (27) is fixedly connected to the first blocking plate (16), and the other end of the guide plate (27) in the adjacent vertical groove (9) is fixedly connected to the second blocking plate (17).

9. The integrated composite electrode bipolar plate according to claim 2, characterized in that: The flow chamber (14) is communicated with the vertical groove (9).

10. The integrated composite electrode bipolar plate according to claim 2, characterized in that: The outflow port (15) and the vertical groove (9) are staggered, and the outflow port (15) is located between two adjacent vertical grooves (9).

Images