CN218123452U

CN218123452U - Fuel cell flow field plate

Info

Publication number: CN218123452U
Application number: CN202221999690.2U
Authority: CN
Inventors: 徐真; 刘江; 张民坚; 韦福品; 麦国杰; 冯高和
Original assignee: Guangdong Edman Hydrogen Energy Equipment Co ltd
Current assignee: Guangdong Edman Hydrogen Energy Equipment Co ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-12-23
Anticipated expiration: 2032-07-29

Abstract

The utility model discloses a flow field plate of a fuel cell, which comprises a flow field plate body, wherein the flow field plate body is provided with an air inlet, an air outlet, ridges and a flow channel formed by the separation of the ridges, and also comprises a buffer zone and a middle separation plate, the buffer zone is arranged at one end of the air inlet, one end of the buffer zone is communicated with the air inlet, and the width of the buffer zone is larger than that of the air inlet; the intermediate partition plate is arranged at the other end of the buffer area, a first buffer flow channel is formed between the intermediate partition plate and the corresponding side of the flow field plate body, one end of the first buffer flow channel is communicated with the buffer area, and the other end of the first buffer flow channel is communicated with the flow channel; this application is through setting up buffer and middle space bar in air inlet one end, will be shunted by the fluid that the air inlet got into through buffer and middle space bar, and the fluid after the reposition of redundant personnel has improved the equipartition nature of fluid when getting into the flow field through first buffering runner entering runner in for the fluid distributes more evenly in parallel runner.

Description

Flow field plate of fuel cell

Technical Field

The utility model relates to a fuel cell technical field, concretely relates to fuel cell flow field board.

Background

The flow field plate, also called bipolar plate, is one of the most important components of fuel cell, and has the functions of introducing and distributing fluid, making fuel and oxidant uniformly distributed in the cell interior, and simultaneously discharging the product of electrochemical reaction in time so as to retain high mass transfer efficiency and excellent performance of cell. At present, common flow field plates mainly include parallel flow field plates, serpentine flow field plates, interdigitated flow field plates and dot flow field plates, wherein the parallel flow field plates have the characteristic of easy processing and are widely applied; however, because the channels in the parallel flow field plates are generally short and the distance between the inlet and the outlet of a single channel is relatively short, the fluid is easily unevenly distributed in the parallel flow field plates, and the output performance of the battery is influenced to a certain extent.

SUMMERY OF THE UTILITY MODEL

To overcome the shortcomings of the prior art, the present invention provides a fuel cell flow field plate with more uniform fluid flow.

The utility model adopts the technical proposal that:

a flow field plate of a fuel cell comprises a flow field plate body, a buffer zone and a middle partition plate, wherein the flow field plate body is provided with an air inlet, an air outlet, a ridge arranged between the air inlet and the air outlet, and a flow channel which is formed by the ridge in a separating way and is respectively communicated with the air inlet and the air outlet; the intermediate partition plate is arranged at the other end of the buffer area, a first buffer flow channel is formed between the intermediate partition plate and the corresponding side of the flow field plate body, one end of the first buffer flow channel is communicated with the buffer area, and the other end of the first buffer flow channel is communicated with the flow channel.

Further, the middle partition plate comprises a first middle partition plate and a second middle partition plate, the first middle partition plate and the second middle partition plate are connected to form a T-shaped structure, the first middle partition plate is arranged at the other end of the buffer area, and the second middle partition plate extends towards the air outlet.

Further, the width of the first intermediate separator is larger than that of the buffer area, and the first buffer flow channel is formed between the first intermediate separator and the corresponding side of the flow field plate body.

Further, the device also comprises two side partition plates, the two side partition plates are respectively positioned at two sides of the second middle partition plate, the side partition plate is arranged at the other end of the first buffer flow channel, a second buffer flow channel is formed between the side partition plate and the corresponding side of the flow field plate body and the middle partition plate, one end of the second buffer flow channel is communicated with the first buffer flow channel, and the other end of the second buffer flow channel is communicated with the flow channel.

Further, the side baffle includes first side baffle and second side baffle, first side baffle with second side baffle is connected and is T type structure, first side baffle sets up the other end of first buffering runner, second side baffle to the gas outlet direction extends.

Further, the ridges are disposed on both sides of the second side partition plate, and divide a space between the second buffer flow passage and the air outlet into a plurality of flow passages.

Further, the width of the air outlet is larger than that of the air inlet and smaller than that of the buffer area.

Further, the cross section of the runner is of a U-shaped structure, and two sides of the runner incline towards the middle direction to form a structure with a wide bottom and a narrow top.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic diagram of a fuel cell flow field plate according to an embodiment of the present disclosure;

fig. 2 is a partial structural schematic view of a flow channel provided in an embodiment of the present application.

The flow field plate comprises a flow field plate body 1, an air inlet 2, a buffer area 3, a first buffer flow channel 4, a middle partition plate 5, a second buffer flow channel 6, a side partition plate 7, a ridge 8, a flow channel 9 and an air outlet 10.

Detailed Description

Here, it is to be noted that the functions, methods, and the like related to the present invention are only conventional adaptive applications of the related art. Therefore, the present invention is an improvement of the prior art, and the essential thing lies in the connection relationship between the hardware, not the function, method itself, that is, the present invention relates to a little function, method, but does not include the improvement proposed to the function, method itself. The present invention is described for better illustration of the function and method for better understanding of the present invention.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

Referring to fig. 1 to 2, the flow field plate for a fuel cell of the present application includes a flow field plate body 1, the flow field plate body 1 is provided with an air inlet 2, an air outlet 10, a ridge 8 disposed between the air inlet 2 and the air outlet 10, and a flow channel 9 partitioned by the ridge 8 and respectively communicated with the air inlet 2 and the air outlet 10, and further includes a buffer region 3 and a middle partition plate 5, the buffer region 3 is disposed at one end of the air inlet 2, and one end of the buffer region is communicated with the air inlet 2, and a width of the buffer region 3 is greater than a width of the air inlet 2; the intermediate partition plate 5 is arranged at the other end of the buffer area 3, a first buffer flow channel 4 is formed between the intermediate partition plate and the corresponding side of the flow field plate body 1, one end of the first buffer flow channel 4 is communicated with the buffer area 3, and the other end of the first buffer flow channel is communicated with the flow channel 9.

This application is through setting up buffer 3 and middle space bar 5 in 2 one ends of air inlet, will be shunted by the fluid that air inlet 2 got into through buffer 3 and middle space bar 5, and the fluid after the reposition of redundant personnel has improved the equipartition nature of fluid when getting into the flow field through first buffering runner 4 entering runner 9 in for the fluid distributes more evenly in parallel runner 9.

Specifically, the intermediate partition 5 includes a first intermediate partition 5 and a second intermediate partition 5, the first intermediate partition 5 and the second intermediate partition 5 are connected to form a T-shaped structure, the first intermediate partition 5 is horizontally disposed at the other end of the buffer area 3, and the second intermediate partition 5 is vertically disposed in the center of the first intermediate partition 5 and extends toward the air outlet 10. The width of the first intermediate separator 5 is greater than that of the buffer area 3, and the first buffer flow channel 4 is formed between the first intermediate separator 5 and the corresponding side of the flow field plate body 1. Fluid enters the buffer area 3 from the air inlet 2, and gradually enters the first buffer flow channel 4 formed between the first intermediate baffle plate 5 and the flow field plate body 1 from the other end of the buffer area 3, so that the fluid is buffered to a certain extent, and the fluid is distributed more uniformly.

In order to further split the fluid, the flow field plate further comprises two side partition plates 7, the two side partition plates 7 are respectively located on two sides of the second intermediate partition plate 5, the side partition plates 7 are arranged at the other end of the first buffer flow channel 4, a second buffer flow channel 6 is formed between the side partition plates 7 and the corresponding sides of the flow field plate body 1 and the intermediate partition plate 5, one end of the second buffer flow channel 6 is communicated with the first buffer flow channel 4, and the other end of the second buffer flow channel 6 is communicated with the flow channel 9. The side baffle 7 includes first side baffle 7 and second side baffle 7, first side baffle 7 with second side baffle 7 is connected and is T type structure, first side baffle 7 level sets up the other end of first buffering runner 4, and the width of first side baffle 7 is greater than the width of first buffering runner 4, and the center of first side baffle 7 is corresponding with the center of the first buffering runner 4 other end, second side baffle 7 sets up perpendicularly in the center of first side baffle 7, and to the gas outlet 10 direction extends. After flowing out of the first buffer flow passage 4, the fluid is blocked by the first side partition plate 7, is further divided by the first side partition plate 7, and flows into the flow passage 9 from both sides of the first side partition plate 7.

The ridges 8 are provided on both sides of the second side partition 7 to divide a space between the second buffer flow passage 6 and the air outlet 10 into a plurality of flow passages 9. In this embodiment, the flow channels 9 are formed between the flow field plate body 1 and the ridge 8, between the ridge 8 and the second side separator 7, and between the ridge 8 and the second intermediate separator 5, and the plurality of flow channels 9 are arranged in parallel and are all communicated with the air outlet 10.

The gas inlet 2 is arranged in the center of one side of the flow field plate body 1, the gas outlet 10 is arranged in the center of the other side of the flow field plate body 1, and the width of the gas outlet 10 is greater than the width of the gas inlet 2 and less than the width of the buffer region 3.

The width of the gas outlet 10 is set to be larger than that of the gas inlet 2, so that the fluid outflow width of the gas outlet 10 is increased, the contact area between gas and a gas diffusion layer is increased, the diffusion of the gas to the gas diffusion layer is facilitated, and the performance of the battery is improved.

The cross section of the runner 9 is of a U-shaped structure, and two sides of the runner 9 incline towards the middle direction to form a structure with a wide lower part and a narrow upper part.

By adopting the cross section of the runner 9, the area of the side wall of the runner 9 is increased, so that the heat exchange area is increased, the chemical reaction rate is improved, and the inclined runner side wall is arranged, so that the liquid water generated by the reaction can be discharged more favorably, the water drops are prevented from forming a water film on the side wall of the runner 9, and the battery performance is improved.

In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral combinations thereof; may be an electrical connection; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the specification of the present invention, a large number of specific details are explained. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, systems, and techniques have not been shown in detail in order not to obscure an understanding of this description.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, system, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, systems, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. A fuel cell flow field plate comprises a flow field plate body, wherein the flow field plate body is provided with an air inlet, an air outlet, a ridge arranged between the air inlet and the air outlet, and a flow channel which is formed by the ridge in a separating way and is respectively communicated with the air inlet and the air outlet; the intermediate partition plate is arranged at the other end of the buffer area, a first buffer flow channel is formed between the intermediate partition plate and the corresponding side of the flow field plate body, one end of the first buffer flow channel is communicated with the buffer area, and the other end of the first buffer flow channel is communicated with the flow channel.

2. The fuel cell flow field plate according to claim 1, wherein the intermediate separator includes a first intermediate separator and a second intermediate separator, the first intermediate separator is connected to the second intermediate separator in a T-shaped configuration, the first intermediate separator is disposed at the other end of the buffer zone, and the second intermediate separator extends in the direction of the air outlet.

3. A fuel cell flow field plate as claimed in claim 2, in which the first intermediate separator plate has a width greater than the width of the buffer zone, the first buffer flow channel being formed between the first intermediate separator plate and the corresponding side of the flow field plate body.

4. A fuel cell flow field plate as claimed in claim 2, further comprising two side separators, two of which are disposed on either side of the second intermediate separator, the side separators being disposed at the other end of the first buffer flow channel and forming a second buffer flow channel between the flow field plate body and the corresponding side of the intermediate separator, one end of the second buffer flow channel being in communication with the first buffer flow channel and the other end thereof being in communication with the flow channel.

5. The fuel cell flow field plate according to claim 4, wherein the side separator plate includes a first side separator plate and a second side separator plate, the first side separator plate and the second side separator plate are connected to form a T-shaped structure, the first side separator plate is disposed at the other end of the first buffer flow channel, and the second side separator plate extends toward the gas outlet.

6. A fuel cell flow field plate as claimed in claim 5, in which the ridges are provided on both sides of the second side separator plate, dividing the space between the second buffer flow channels and the gas outlet into a plurality of flow channels.

7. A fuel cell flow field plate as claimed in any one of claims 1 to 6, in which the width of the gas outlet is greater than the width of the gas inlet and less than the width of the buffer region.

8. The fuel cell flow field plate of claim 1, wherein the cross-section of the flow channels is a U-shaped structure, and the two sides of the flow channels are inclined towards the middle direction to form a structure with a wide bottom and a narrow top.