Fuel cell runner structure
By improving the flow channel structure of the fuel cell, extending the residence time of the reactant gas and improving heat dissipation efficiency, the problems of water blockage and low gas utilization in traditional flow channels are solved, and more efficient fuel cell performance is achieved.
Patent Information
- Application Number
- CN202423316093.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Traditional straight parallel flow channels have a smaller pressure drop and a lower overall flow velocity. The water produced in the reaction cannot be discharged in time, resulting in local water blockage in the flow channel, short residence time of the reacting gas, and low gas utilization rate.
Design a flow channel structure including a bipolar plate, an inlet, an outlet, a guide chamber, and a guide groove to increase the residence time of the reactant gas in the bipolar plate, and improve heat dissipation efficiency through copper heat sinks and bumps.
The residence time of the reactant gas in the bipolar plate was extended, improving gas utilization. The heat dissipation efficiency was further improved by using copper heat sinks and bumps, thus solving the problems of water blockage in the flow channel and low gas utilization.
Smart Images
Figure CN223911650U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fuel cell technology, specifically to a fuel cell flow channel structure. Background Technology
[0002] Fuel cells are a type of energy source characterized by high efficiency, high specific energy, and low pollution, attracting increasing attention. The electrode plates are a crucial component of a fuel cell; the flow channels on their surfaces play a vital role in distributing reactant gases, collecting current, providing mechanical support, managing hydrothermal processes, and separating the anode and cathode gases. A well-designed electrode flow channel system ensures that all parts of the electrode receive sufficient reactant gases and that generated water is promptly discharged, thereby guaranteeing good performance and stability of the fuel cell.
[0003] Improvements can be made to the existing technology. Currently, the straight parallel flow channel is the most common flow channel. However, the traditional straight parallel flow channel has the following shortcomings: due to the small pressure drop of the straight parallel flow channel, the overall flow velocity is reduced, and the water produced by the reaction cannot be discharged in time, which can easily cause local water blockage in the flow channel; in addition, the residence time of the reaction gas in the straight parallel flow channel is short, and the gas utilization rate is low.
[0004] The information disclosed in the prior art is only intended to enhance the understanding of the background technology of this application, and should not be regarded as an admission or in any way implying that the information constitutes prior art known to those skilled in the art.
[0005] Therefore, it is necessary to propose a fuel cell flow channel structure for the above technical solution. Utility Model Content
[0006] The purpose of this invention is to provide a fuel cell flow channel structure to solve the problems mentioned in the background art.
[0007] To achieve the above objectives, this utility model provides the following technical solution: a fuel cell flow channel structure, including a bipolar plate, an air inlet is provided at the upper left end of the bipolar plate, a second air guide cavity arranged in a ring is provided at the right side of the air inlet, a first air guide groove is provided at the lower end of the second air guide cavity, a circular cavity is provided at the bottom of the first air guide groove, a second air guide groove is provided at the bottom of the circular cavity, a third air guide groove is provided at the bottom of the second air guide groove, a first air guide cavity is provided at the bottom of the third air guide groove, and an air outlet is provided at the right side of the first air guide cavity.
[0008] Preferably, a plurality of first heat sinks are fixedly disposed on the front end face of the bipolar plate, and a plurality of first heat sink protrusions are fixedly disposed on the front end face of the first heat sinks.
[0009] Preferably, the number of the first radiating fins is not less than ten, and the number of the first radiating bumps is not less than nine.
[0010] Preferably, the back end surface of the bipolar plate is fixedly connected with a plurality of second radiating fins, and the back end surface of the second radiating fin is fixedly connected with a plurality of second radiating bumps.
[0011] Preferably, the second radiating bump and the second radiating fin are both made of copper material.
[0012] Preferably, the inside of the first air guiding cavity is fixedly provided with a guide plate.
[0013] The utility model has the advantages of:
[0014] Through the structural design of the bipolar plate, the air inlet, the air outlet, the first air guiding cavity, the guide plate, the second air guiding cavity, the first air guiding groove, the circular cavity, the second air guiding groove and the third air guiding groove, when the reaction gas enters the bipolar plate through the air inlet, it will pass through the second air guiding cavity, the first air guiding groove, the circular cavity, the second air guiding groove, the third air guiding groove and the first air guiding cavity in sequence, and finally be discharged through the air outlet, the whole process requires a long time, which can greatly increase the residence time of the reaction gas in the bipolar plate, thereby improving the utilization rate of the gas, solving the problem that the straight line parallel flow channel is the most common flow channel, but the traditional straight line parallel flow channel has the following problems: the pressure drop of the straight line parallel flow channel is small, the overall flow rate is low, the water produced by the reaction cannot be discharged in time, and the phenomenon of local water blocking in the flow channel is easy to occur; in addition, the residence time of the reaction gas in the straight line parallel flow channel is short, and the gas utilization rate is low.
[0015] Through the structural design of the first radiating fin, the first radiating bump, the second radiating bump and the second radiating fin, the first radiating fin, the first radiating bump, the second radiating bump and the second radiating fin made of copper material can be used in cooperation, which can greatly increase the heat dissipation efficiency of the bipolar plate, and the cost of copper material is low, thereby improving the practicability of the bipolar plate. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is a three-dimensional partial schematic view of the overall structure of the utility model;
[0017] Figure 2 It is a left view partial structure schematic view of the utility model;
[0018] Figure 3 It is a rear view partial structure schematic view of the utility model;
[0019] Figure 4 It is a top view partial structure schematic view of the utility model;
[0020] Figure 5The sectional view partial structure schematic diagram of the utility model.
[0021] In the drawing, reference numerals are: 1, bipolar plate; 2, first fin; 3, first heat dissipation bump; 4, air inlet; 5, air outlet; 6, second heat dissipation bump; 7, second fin; 8, first air guide cavity; 9, guide plate; 10, second air guide cavity; 11, first air guide groove; 12, circular cavity; 13, second air guide groove; 14, third air guide groove. DETAILED DESCRIPTION
[0022] In order to make the skilled in the art better understand the technical scheme of the utility model, the utility model is described in detail below in conjunction with the drawings, and the description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the utility model.
[0023] It should be noted that: similar signs and letters indicate similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.
[0024] It should be noted that: similar signs and letters indicate similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.
[0025] In addition, the terms "horizontal", "vertical", "overhang" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.
[0026] In the description of the utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0027] Please refer to Figures 1-5The utility model provides an embodiment: a fuel cell flow channel structure, including bipolar plate 1, the left side upper end of bipolar plate 1 is equipped with air inlet 4, the right side of air inlet 4 is equipped with the second gas guide cavity 10 of annular arrangement, the lower end of second gas guide cavity 10 is equipped with the first gas guide groove 11 of intercommunication, the bottom of first gas guide groove 11 is equipped with the circular cavity 12 of intercommunication, the bottom of circular cavity 12 is equipped with the second gas guide groove 13 of intercommunication, the bottom of second gas guide groove 13 is equipped with the third gas guide groove 14 of intercommunication, the bottom of third gas guide groove 14 is equipped with the first gas guide cavity 8 of intercommunication, the inside fixed setting of first gas guide cavity 8 has guide plate 9, the right side of first gas guide cavity 8 is equipped with the air outlet 5 of intercommunication,
[0028] Specifically, as shown in Figure 1 、 Figure 2 、 Figure 3 And Figure 5 Show, when using, after the reaction gas enters bipolar plate 1 through air inlet 4, will pass through second gas guide cavity 10, first gas guide groove 11, circular cavity 12, second gas guide groove 13, third gas guide groove 14 and first gas guide cavity 8 in proper order, and finally discharge through air outlet 5, the time required for the whole process is long, can greatly increase the residence time of reaction gas in bipolar plate 1, thereby can improve the utilization rate of gas, solve the current straight line parallel flow channel is the most common flow channel, but, traditional straight line parallel flow channel has the following disadvantages: because the pressure drop of straight line parallel flow channel is small, the overall flow rate is reduced, the water produced by reaction cannot be discharged in time, and the phenomenon of local water blocking in flow channel is easily caused, in addition, the residence time of reaction gas in straight line parallel flow channel is short, and the gas utilization rate is low.
[0029] The front end of bipolar plate 1 is fixedly provided with a plurality of first radiating fins 2, the front end of first radiating fin 2 is fixedly provided with a plurality of first radiating bosses 3, the number of first radiating fin 2 is not less than ten, the number of first radiating boss 3 is not less than nine, the rear end of bipolar plate 1 is fixedly connected with a plurality of second radiating fins 7, the rear end of second radiating fin 7 is fixedly connected with a plurality of second radiating bosses 6, and second radiating boss 6 and second radiating fin 7 are both made of copper material;
[0030] As shown in Figure 1 And Figure 4 Show, when using, the cooperation of the plurality of first radiating fins 2, first radiating bosses 3, second radiating bosses 6 and second radiating fins 7 made of copper material can greatly increase the heat dissipation efficiency of the bipolar plate 1, and the cost of copper material is relatively low, thereby improving the practicality of the bipolar plate 1.
[0031] Working principle: when the reaction gas enters into the bipolar plate 1 through the gas inlet 4, will in turn through the second gas guide cavity 10, the first gas guide groove 11, the circular cavity 12, the second gas guide groove 13, the third gas guide groove 14 and the first gas guide cavity 8, finally through the gas outlet 5 and is discharged, the whole process required time is long, can greatly increase the residence time of reaction gas in the bipolar plate 1, to improve the utilization rate of gas, second, can pass through the cooperation of copper material by multiple first radiating fin 2, first radiating bump 3, second radiating bump 6 and second radiating fin 7, the cooperation of use, can greatly increase the heat dissipation efficiency of the bipolar plate 1, copper material cost is lower simultaneously, to improve the practicality of the bipolar plate 1.
[0032] It is to be understood that the terminology "including", "comprising", or any other variation thereof, is intended to cover a non-exclusive inclusion, such that processes, methods, articles, or apparatuses that comprise a list of elements are not to be construed as consisting only of those elements but can include other elements not expressly listed or inherent to such processes, methods, articles, or apparatuses.
[0033] Although the utility model discloses as above, the utility model is not limited to this. Any person skilled in the art, without departing from the utility model concept, can also make several variations and improvements, and these all belong to the protection scope of the utility model, therefore the protection scope of the utility model patent should be the range limited by the claims.
Claims
1. A fuel cell flow channel structure, characterized by: The application relates to a bipolar plate (1), which is provided with an air inlet (4) at the left upper end, a second air guide cavity (10) in the shape of a ring is arranged at the right side of the air inlet (4), a first air guide groove (11) is arranged at the lower end of the second air guide cavity (10) and is in communication with the second air guide cavity (10), a circular cavity (12) is arranged at the bottom of the first air guide groove (11) and is in communication with the first air guide groove (11), a second air guide groove (13) is arranged at the bottom of the circular cavity (12) and is in communication with the circular cavity (12), a third air guide groove (14) is arranged at the bottom of the second air guide groove (13) and is in communication with the second air guide groove (13), a first air guide cavity (8) is arranged at the bottom of the third air guide groove (14) and is in communication with the third air guide groove (14), and an air outlet (5) is arranged at the right side of the first air guide cavity (8) and is in communication with the first air guide cavity (8).
2. A fuel cell flow channel structure as claimed in claim 1, characterized by: A plurality of first heat dissipation fins (2) are fixedly arranged on the front end surface of the bipolar plate (1), and a plurality of first heat dissipation protrusions (3) are fixedly arranged on the front end surface of the first heat dissipation fins (2).
3. A fuel cell flow channel structure as claimed in claim 2, wherein: The number of the first heat dissipation fins (2) is not less than ten, and the number of the first heat dissipation protrusions (3) is not less than nine.
4. A fuel cell flow channel structure as claimed in claim 2, wherein: First heat dissipation strips are arranged on the bipolar plate (1) between two adjacent rows of the first heat dissipation fins (2).
5. A fuel cell flow channel structure as claimed in claim 1, wherein: A plurality of second heat dissipation fins (7) are fixedly connected to the rear end surface of the bipolar plate (1), and a plurality of second heat dissipation protrusions (6) are fixedly connected to the rear end surface of the second heat dissipation fins (7).
6. A fuel cell flow channel structure as claimed in claim 5, wherein: Second heat dissipation strips are arranged on the bipolar plate (1) between two adjacent rows of the second heat dissipation fins (7).
7. A fuel cell flow channel structure as claimed in claim 4, wherein: The first heat dissipation fins (2), the first heat dissipation protrusions (3), the second heat dissipation protrusions (6), the second heat dissipation fins (7), the first heat dissipation strips and the second heat dissipation strips are all made of copper material, aluminum alloy or stainless steel.
8. A fuel cell flow channel structure as claimed in claim 1, wherein: A guide plate (9) is fixedly arranged in the first air guide cavity (8).