Fuel cell runner structure

Abstract

The utility model provides a fuel cell runner structure which comprises a plurality of runner bodies arranged in parallel, and a runner ridge is arranged between every two adjacent runner bodies; each runner ridge at least comprises a first runner ridge and a second runner ridge which are integrally arranged; the first runner ridge is arranged close to an inlet of the runner body; an included angle formed by the intersection of the first runner ridge and the second runner ridge on the same runner ridge is an obtuse angle; at least one first notch is formed in each first runner ridge; at least one second notch is formed in each second runner ridge; and the first notches and the second notches are communicated with the adjacent runner bodies. The first notches and the second notches are formed in the runner ridge, so that cooling liquid can be more uniformly distributed in the runner body, the flow distribution is uniform, each polar plate can be ensured to be good in heat dissipation, and the purpose of effectively cooling the fuel cell stack is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a fuel cell flow channel structure. Background Art

[0002] Faced with the increasingly stringent exhaust emission standards in China and even the world and the future energy crisis, major automobile manufacturers are developing low-emission new energy technologies to adapt to this development trend. Among them, fuel cell vehicles are one of the areas that major automobile companies are vigorously developing. Fuel cells have many advantages such as cleanliness and high efficiency, and are attracting more and more attention.

[0003] A fuel cell is composed of multiple bipolar plates and membrane electrode stacks with the same structure. Each bipolar plate has a reaction flow field and needs to be cooled separately. Generally, the internal space formed by the combination of the anode plate and the cathode plate is the cooling area. When the fuel cell is working at full load, the temperature is the highest and the required heat dissipation is the largest. If the heat dissipation is insufficient, the performance of the fuel cell stack may be reduced, and in severe cases, irreversible damage to the fuel cell may be caused. Therefore, the cooling design of the fuel cell stack is particularly critical.

[0004] In the prior art, the electrode plates of fuel cells are bipolar plates formed by combining an anode plate and a cathode plate. The electrode plate design is mainly based on hydrogen and air paths, leaving little design space for the cooling chamber, resulting in very uneven water distribution, thereby affecting the heat dissipation of the stack; when the fuel cell is operating at high power, it is difficult to meet the normal heat dissipation requirements of the stack. Utility Model Content

[0005] Based on this, an embodiment of the utility model provides a fuel cell flow channel structure, which aims to solve the problem of insufficient flow and uneven distribution of cooling water channels of existing fuel cell plates, resulting in insufficient heat dissipation of the fuel cell under high-power conditions.

[0006] To achieve the above-mentioned purpose, an embodiment of the utility model provides a fuel cell flow channel structure, including a plurality of flow channel bodies arranged in parallel, and a flow channel ridge is arranged between two adjacent flow channel bodies; each of the flow channel ridges includes at least a first flow channel ridge and a second flow channel ridge arranged integrally; the first flow channel ridge is arranged close to the entrance of the flow channel body; the angle formed by the intersection of the first flow channel ridge and the second flow channel ridge located on the same flow channel ridge is an obtuse angle; each of the first flow channel ridges is provided with at least one first notch; each of the second flow channel ridges is provided with at least one second notch; the first notch and the second notch are both arranged in communication with the adjacent flow channel bodies.

[0007] As a preferred embodiment, the first notches on two adjacent first flow channel ridges are on the same horizontal line.

[0008] As a preferred embodiment, adjacent first notches are parallel to each other and symmetrically arranged.

[0009] As a preferred implementation, the second notches on two adjacent second flow channel ridges are on the same horizontal line.

[0010] As a preferred embodiment, adjacent second notches are parallel to each other and symmetrically arranged.

[0011] As a preferred embodiment, the length of the first notch and the length of the second notch are both equal to the width of the flow channel body.

[0012] As a preferred embodiment, the depth of the first notch and the depth of the second notch are both smaller than the thickness of the flow channel ridge.

[0013] As a preferred embodiment, the first notch is arranged close to the inlet of the flow channel body; and the second notch is arranged on an end of the second flow channel ridge close to the first flow channel ridge.

[0014] As a preferred embodiment, when a plurality of the first notches are provided on the same first flow channel ridge, the plurality of the first notches are arranged at equal intervals.

[0015] As a preferred embodiment, when a plurality of the second notches are provided on the same second flow channel ridge, the plurality of the second notches are arranged at equal intervals.

[0016] As a preferred embodiment, the angle is a rounded angle. By setting the rounded angle, it is beneficial to promote the flow diversion of the fluid, so that the flow distribution of each flow channel body is uniform, and at the same time, the loss of turbulent kinetic energy during the flow of the fluid is reduced, and the gas kinetic energy loss caused by the structure is reduced, and the generation of corner vortices is avoided.

[0017] As a preferred embodiment, the fuel cell flow channel structure is a fuel cell coolant flow channel structure.

[0018] For example, when the fuel cell flow channel structure is applied to the coolant (water) flow channel of the fuel cell plate, the coolant flow channel of the fuel cell flow channel structure of the present application has more distribution backflow areas, so that the coolant can be more evenly distributed in the flow channel body, and the flow distribution is uniform, which can ensure that each plate can dissipate heat well, thereby achieving the purpose of effectively cooling the fuel cell stack, and can effectively solve the problem of insufficient coolant flow and uneven distribution. And the structure is simple, the energy consumption is low, it is economical and practical, easy to install, stable and reliable, and has good processability.

[0019] The utility model proposes a fuel cell flow channel structure, which provides a first notch and a second notch on the flow channel ridge, so that the coolant flow channel of the fuel cell flow channel structure has more distribution backflow areas, so that the coolant can be more evenly distributed in the flow channel body, and the flow distribution is even, which can ensure that each plate can dissipate heat well, thereby achieving the purpose of effectively cooling the fuel cell stack, and can effectively solve the problem of insufficient coolant flow and uneven distribution. In addition, the present application has a simple structure, low energy consumption, economical and practical, easy installation, stable and reliable, good processability, and can be used in a fuel cell system, especially suitable for the use of fuel cells under high-power conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of a three-dimensional structure of a fuel cell flow channel structure according to an embodiment of the utility model;

[0022] Figure 2 for Figure 1 A front view of a fuel cell flow channel structure;

[0023] Figure 3 for Figure 1 Rear view of the fuel cell flow channel structure.

[0024] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0030] Specifically, Figure 1 to Figure 2 As shown, an embodiment of the utility model provides a fuel cell flow channel structure, including a plurality of parallel arranged flow channel bodies 10, and a flow channel ridge 20 is arranged between two adjacent flow channel bodies 10; each of the flow channel ridges 20 includes at least a first flow channel ridge 21 and a second flow channel ridge 22 which are arranged integrally; the first flow channel ridge 21 is arranged close to the inlet 11 of the flow channel body 10; the angle formed by the intersection of the first flow channel ridge 21 and the second flow channel ridge 22 located on the same flow channel ridge 20 is an obtuse angle; each of the first flow channel ridges 21 is provided with at least one first notch 30; each of the second flow channel ridges 22 is provided with at least one second notch 40; the first notch 30 and the second notch 40 are both connected to the adjacent flow channel bodies 10.

[0031] By setting a first notch 30 on the first flow channel ridge 21 and a second notch 40 on the second flow channel ridge 22, and connecting the first notch 30 and the second notch 40 with the adjacent flow channel body, the coolant flow channel of the fuel cell flow channel structure has more distribution backflow areas, so that the coolant can be more evenly distributed in the flow channel body and the flow distribution is uniform.

[0032] As a preferred embodiment, the first notches 30 on two adjacent first flow channel ridges 21 are on the same horizontal line. In this way, the coolant can be more evenly distributed in the flow channel body, and the flow rate is evenly distributed.

[0033] As a preferred embodiment, adjacent first notches 30 are parallel to each other and symmetrically arranged, so that the coolant can be more evenly distributed in the flow channel body, and the flow distribution is even.

[0034] As a preferred embodiment, the second notches 40 on two adjacent second flow channel ridges 22 are located on the same horizontal line. In this way, the coolant can be more evenly distributed in the flow channel body, and the flow distribution is even.

[0035] As a preferred embodiment, adjacent second notches 40 are parallel to each other and symmetrically arranged, so that the coolant can be more evenly distributed in the flow channel body, and the flow distribution is even.

[0036] As a preferred embodiment, the length of the first notch 30 and the length of the second notch 40 are both equal to the width of the flow channel body 10. In this way, the coolant can be more evenly distributed in the flow channel body, and the flow distribution is even.

[0037] As a preferred embodiment, the depth of the first notch 30 and the depth of the second notch 40 are both less than the thickness of the flow channel ridge 20. In the embodiment of the present application, the thickness of the first flow channel ridge 21 is equal to the thickness of the second flow channel ridge 22, and both are equal to the thickness of the flow channel ridge 20. By controlling the depth of the first notch 30 and the depth of the second notch 40 to be less than the thickness of the flow channel ridge 20, it can be ensured that the coolant flow channel of the fuel cell flow channel structure has more distribution backflow areas, so that the coolant can be more evenly distributed in the flow channel body, and the flow channel structure can be ensured to have good structural strength.

[0038] As a preferred embodiment, the first notch 30 is arranged near the inlet of the flow channel body 10, and the second notch 40 is arranged on one end of the second flow channel ridge 22 close to the first flow channel ridge 21. In this way, the coolant can be more evenly distributed in the flow channel body, and the flow distribution is even.

[0039] As a preferred embodiment, when a plurality of first notches 30 are provided on the same first flow channel ridge 21, the plurality of first notches 30 are provided at equal intervals, so that the coolant can be more evenly distributed in the flow channel body and the flow rate is evenly distributed.

[0040] As a preferred embodiment, when a plurality of second notches 40 are provided on the same second flow channel ridge 22, the plurality of second notches 40 are provided at equal intervals, so that the coolant can be more evenly distributed in the flow channel body and the flow rate is evenly distributed.

[0041] As a preferred embodiment, the angle is a rounded angle. By setting the rounded angle, it is beneficial to promote the flow diversion of the fluid, so that the flow distribution of each flow channel body is uniform, and at the same time, the loss of turbulent kinetic energy during the flow of the fluid is reduced, and the gas kinetic energy loss caused by the structure is reduced, and the generation of corner vortices is avoided.

[0042] As a preferred embodiment, the fuel cell flow channel structure is a fuel cell coolant flow channel structure.

[0043] like Figure 3 As shown, in the fuel cell flow channel structure of the present application, the gas flow channel structure has not been changed, and a commonly used gas flow channel structure can be used.

[0044] For example, when the fuel cell flow channel structure is applied to the coolant (water) flow channel of the fuel cell plate, the coolant flow channel of the fuel cell flow channel structure of the present application has more distribution backflow areas, so that the coolant can be more evenly distributed in the flow channel body, and the flow distribution is uniform, which can ensure that each plate can dissipate heat well, thereby achieving the purpose of effectively cooling the fuel cell stack, and can effectively solve the problem of insufficient coolant flow and uneven distribution. And the structure is simple, the energy consumption is low, it is economical and practical, easy to install, stable and reliable, and has good processability.

[0045] The utility model proposes a fuel cell flow channel structure, which provides a first notch and a second notch on the flow channel ridge, so that the coolant flow channel of the fuel cell flow channel structure has more distribution backflow areas, so that the coolant can be more evenly distributed in the flow channel body, and the flow distribution is even, which can ensure that each plate can dissipate heat well, thereby achieving the purpose of effectively cooling the fuel cell stack, and can effectively solve the problem of insufficient coolant flow and uneven distribution. In addition, the present application has a simple structure, low energy consumption, economical and practical, easy installation, stable and reliable, good processability, and can be used in a fuel cell system, especially suitable for the use of fuel cells under high-power conditions.

[0046] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A fuel cell flow channel structure, characterized in that: It comprises a plurality of parallelly arranged flow channel bodies, with a flow channel ridge being arranged between two adjacent flow channel bodies; each of the flow channel ridges comprises at least an integrally arranged first flow channel ridge and a second flow channel ridge; the first flow channel ridge is arranged close to the entrance of the flow channel body; the angle formed by the intersection of the first flow channel ridge and the second flow channel ridge located on the same flow channel ridge is an obtuse angle; each of the first flow channel ridges is provided with at least one first notch; each of the second flow channel ridges is provided with at least one second notch; the first notch and the second notch are both arranged in communication with the adjacent flow channel bodies.

2. The fuel cell flow channel structure according to claim 1, characterized in that: The first notches on two adjacent first flow channel ridges are located on the same horizontal line.

3. The fuel cell flow channel structure according to claim 2, characterized in that: Adjacent first notches are parallel to each other and symmetrically arranged.

4. The fuel cell flow channel structure according to claim 1, characterized in that: The second notches on two adjacent second flow channel ridges are located on the same horizontal line.

5. The fuel cell flow channel structure according to claim 4, characterized in that: Adjacent second notches are parallel to each other and symmetrically arranged.

6. The fuel cell flow channel structure according to claim 1, characterized in that: The length of the first notch and the length of the second notch are both equal to the width of the flow channel body; The depth of the first notch and the depth of the second notch are both smaller than the thickness of the flow channel ridge.

7. The fuel cell flow channel structure according to claim 1, characterized in that: The first notch is arranged near the inlet of the flow channel body; the second notch is arranged on an end of the second flow channel ridge near the first flow channel ridge.

8. The fuel cell flow channel structure according to claim 1, characterized in that: When a plurality of the first notches are disposed on the same first flow channel ridge, the plurality of the first notches are disposed at equal intervals.

9. The fuel cell flow channel structure according to claim 1, characterized in that: When a plurality of the second notches are disposed on the same second flow channel ridge, the plurality of the second notches are disposed at equal intervals.

10. The fuel cell flow channel structure according to claim 1, characterized in that: The angle is a rounded angle; the fuel cell flow channel structure is a fuel cell coolant flow channel structure.

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