Fuel cell end cover structure and fuel cell drainage system
By setting a slope and a hydrophobic layer on the end cap structure of the fuel cell, combining the water tank and the gas-water separator, the problem of condensation water accumulation of the stack is solved, and the performance and reliability of the stack are improved.
Patent Information
- Application Number
- CN202422132231.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-08-30
AI Technical Summary
Fuel cell stacks are easily disturbed by condensate and liquid water during operation, resulting in performance degradation and even failure. The prior art is difficult to effectively manage the water vapor condensation problem inside the stack.
A fuel cell end cap structure is designed, including the first and second slopes arranged on the end plate of the stack, with the high point close to the stack, to prevent the entry of external condensate water and guide the discharge of water vapor condensate inside the stack, and to form a complete drainage system in combination with a hydrophobic layer, a water reservoir and a gas-water separator.
It effectively blocks the external condensate water from entering the stack, reduces the risk of condensate accumulation, prevents the flooding of the stack, improves the performance and reliability of the stack, and realizes efficient circulation discharge of internal water management of the stack.
Smart Images
Figure CN223140796U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fuel cells, and in particular to a fuel cell end cover structure and a fuel cell drainage system. Background Technique
[0002] As part of a clean energy solution, fuel cell systems have been widely concerned. However, fuel cell stacks are prone to interference from condensed water and liquid water during operation, which may lead to a decline in stack performance or even complete failure.
[0003] In fuel cell systems, water management has always been a challenging issue. The water vapor generated inside the stack may cool and condense into liquid water at the hydrogen inlet and outlet of the stack end plate. These condensed waters may have an adverse impact on the stack, including reducing stack efficiency, damaging catalyst activity, and even causing serious problems such as stack flooding, seriously affecting the performance and lifespan of the stack. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a fuel cell end cover structure and a fuel cell drainage system to alleviate the technical problem that the water vapor generated inside the stack in the prior art may cool and condense into liquid water at the hydrogen inlet and outlet of the stack end plate.
[0005] In a first aspect, an embodiment of the utility model provides a fuel cell end cover structure, including a stack end plate;
[0006] A hydrogen inlet and a hydrogen outlet are provided on the stack end plate;
[0007] On the side of the stack end plate facing away from the stack, a first slope is provided at the hydrogen inlet, and the high point of the first slope is closer to the stack than the low point;
[0008] On the side of the stack end plate facing away from the stack, a second slope structure is provided at the hydrogen outlet, and the high point of the second slope structure is closer to the stack than the low point.
[0009] In combination with the first aspect, an embodiment of the utility model provides a possible implementation manner of the first aspect, wherein a water storage tank is provided below both the first slope and the second slope, so that the accumulated water on both the first slope and the second slope flows into the water storage tank.
[0010] In combination with the first aspect, an embodiment of the utility model provides a possible implementation manner of the first aspect, wherein groove structures are provided at the low points of both the first slope and the second slope, and the groove structures are communicated with the water storage tank.
[0011] In combination with the first aspect, an embodiment of the utility model provides a possible implementation of the first aspect, wherein the groove structure adopts a water guide groove.
[0012] In combination with the first aspect, the embodiment of the utility model provides a possible implementation of the first aspect, wherein the surfaces of the first slope and the second slope are both coated with a hydrophobic layer.
[0013] In combination with the first aspect, an embodiment of the utility model provides a possible implementation of the first aspect, wherein the hydrophobic layer is made of polyvinylidene fluoride.
[0014] In combination with the first aspect, an embodiment of the utility model provides a possible implementation of the first aspect, wherein the water storage tank is connected to the gas-water separator through a pipeline.
[0015] In combination with the first aspect, the embodiment of the utility model provides a possible implementation of the first aspect, wherein a control valve is provided on the above-mentioned pipeline.
[0016] In combination with the first aspect, the embodiment of the utility model provides a possible implementation of the first aspect, wherein the control valve is a solenoid valve.
[0017] In a second aspect, an embodiment of the utility model provides a fuel cell drainage system, including the fuel cell end cover structure.
[0018] Beneficial effects:
[0019] The utility model provides a fuel cell end cover structure, including a stack end plate; a hydrogen inlet and a hydrogen outlet are provided on the stack end plate; a first slope is provided on a side of the stack end plate away from the stack and located at the hydrogen inlet, and the high point of the first slope is closer to the stack than the low point; a second slope structure is provided on a side of the stack end plate away from the stack and located at the hydrogen outlet, and the high point of the second slope structure is closer to the stack than the low point.
[0020] A hydrogen inlet and a hydrogen outlet are provided on an end plate of the fuel cell stack, a first slope is arranged at the hydrogen inlet, and the high point of the first slope is closer to the low point of the fuel cell stack, so that during the operation of the fuel cell stack, external condensed water can be prevented from entering the fuel cell stack; in addition, a second slope is arranged at the hydrogen outlet, and the high point of the second slope structure is closer to the low point of the fuel cell stack, so that during the operation of the fuel cell stack, condensed water generated by the water vapor generated inside the fuel cell stack when it is cooled can be discharged along the surface of the first slope. By setting the first slope and the second slope, condensed water can be discharged more easily, reducing the risk of condensed water accumulation at the hydrogen outlet, preventing external condensed water from entering the fuel cell stack, and the slope structure effectively blocks the entry of external liquid water, preventing the risk of flooding of the fuel cell stack.
[0021] The present utility model provides a fuel cell drainage system, including a fuel cell end cover structure. The fuel cell drainage system has the above-mentioned advantages compared with the prior art, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0023] Figure 1 It is a schematic structural diagram of the fuel cell end cover structure provided by the embodiment of the present utility model;
[0024] Figure 2 is Figure 1 a cross-sectional view taken along A - A in
[0025] Figure 3 is Figure 2 a cross-sectional view taken along B - B in
[0026] Figure 4 It is a schematic diagram of the groove structure in the fuel cell end cover structure provided by the embodiment of the present utility model;
[0027] Figure 5 It is a schematic diagram of the principle of the fuel cell end cover structure provided by the embodiment of the present utility model forming a drainage system.
[0028] Reference Signs:
[0029] 1 - stack end plate; 2 - hydrogen outlet; 3 - hydrogen inlet; 41 - first ramp; 42 - second ramp; 5 - groove structure; 6 - water storage tank; 7 - control valve; 8 - pipeline; 9 - gas - water separator. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0030] The following will clearly and completely describe the technical solutions of the present utility model in conjunction with the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present utility model belong to the scope of protection of the present utility model.
[0031] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.
[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless otherwise specifically defined.
[0033] In the present utility model, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0034] The following further describes the present utility model in detail through specific embodiments in conjunction with the drawings.
[0035] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown in
[0036] The fuel cell end plate 1 is provided with a hydrogen inlet 3 and a hydrogen outlet 2. A first slope 41 is provided at the hydrogen inlet 3, and the high point of the first slope 41 is closer to the fuel cell than the low point, so that during the operation of the fuel cell, external condensed water can be prevented from entering the fuel cell. In addition, a second slope 42 is provided at the hydrogen outlet 2, and the high point of the second slope 42 structure is closer to the fuel cell than the low point, so that during the operation of the fuel cell, the condensed water generated by the condensation of the water vapor inside the fuel cell can drain along the surface of the first slope 41. Through the settings of the first slope 41 and the second slope 42, the condensed water can be drained more easily, the risk of accumulation of condensed water at the hydrogen outlet 2 can be reduced, and external condensed water can be blocked from entering the fuel cell. The slope structure effectively blocks the entry of external liquid water and prevents the risk of fuel cell flooding.
[0037] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown in, in an alternative embodiment of the present embodiment, water storage tanks 6 are provided below both the first slope 41 and the second slope 42, so that the accumulated water on both the first slope 41 and the second slope 42 can flow into the water storage tank 6.
[0038] Wherein, groove structures 5 are provided at the low points of both the first slope 41 and the second slope 42, and the groove structures 5 communicate with the water storage tank 6.
[0039] Wherein, the groove structure 5 adopts a water guide groove.
[0040] Specifically, water storage tanks 6 are provided below both the first slope 41 and the second slope 42, and the condensed water blocked and diverted by both the first slope 41 and the second slope 42 can slide down along the slope into their respective water storage tanks 6.
[0041] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown in, in an alternative embodiment of the present embodiment, hydrophobic layers are coated on the surfaces of both the first slope 41 and the second slope 42.
[0042] Specifically, hydrophobic layers are coated on the surfaces of both the first slope 41 and the second slope 42. Through the setting of the hydrophobic layers, their waterproof performance and protection mechanism can be effectively improved.
[0043] In addition, the hydrophobic layer can be made of polyvinylidene fluoride. Secondly, those skilled in the art can select the material of the hydrophobic layer according to actual needs, and details will not be elaborated here.
[0044] See Figure 1 ,Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown in Figure 2 , Figure 3 , Figure 4 and Figure 5 , in an alternative solution of this embodiment, the water storage tank 6 is connected to the gas-water separator 9 through a pipeline 8.
[0045] Wherein, a control valve 7 is arranged on the pipeline 8.
[0046] Wherein, the control valve 7 adopts an electromagnetic valve.
[0047] Wherein, the opening and closing of the electromagnetic valve can have the same frequency as the opening and closing of the gas-water separator 9. Through the control of the opening and closing of the electromagnetic valve, the water in the water storage tank 6 can be timely discharged into the gas-water separator 9 and then discharged. In addition, those skilled in the art can set the inclination angle and height of the slope according to actual needs, so that external liquid water cannot easily enter the fuel cell stack, achieving the effect of water barrier.
[0048] Specifically, a complete fuel cell stack water management system is composed of a slope structure, a water storage tank 6 and a gas-water separator, so as to prevent the entry of condensed water, promote the discharge of condensed water and the collection of condensed water attached to the surface to form a complete circulation system, effectively solve the problem of condensed water, and improve the performance and reliability of the fuel cell stack.
[0049] This embodiment provides a fuel cell drainage system, including a fuel cell end cover structure.
[0050] Specifically, the fuel cell drainage system has the advantages of the above-mentioned fuel cell end cover structure compared with the prior art, which will not be elaborated here.
[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A fuel cell end cover structure, characterized in that, Comprising: Stack end plate (1); A hydrogen inlet (3) and a hydrogen outlet (2) are provided on the stack end plate (1); A first slope (41) is provided at the hydrogen inlet (3) on the side of the stack end plate (1) facing away from the stack, and the high point of the first slope (41) is closer to the stack than the low point; A second slope (42) structure is provided at the hydrogen outlet (2) on the side of the stack end plate (1) facing away from the stack, and the high point of the second slope (42) structure is closer to the stack than the low point.
2. The fuel cell end cover structure according to claim 1, characterized in that, Water storage tanks (6) are provided below both the first slope (41) and the second slope (42) so that the accumulated water on the first slope (41) and the second slope (42) flows into the water storage tanks (6).
3. The fuel cell end cover structure according to claim 2, characterized in that, Groove structures (5) are provided at the low points of both the first slope (41) and the second slope (42), and the groove structures (5) communicate with the water storage tanks (6).
4. The fuel cell end cap structure according to claim 3, characterized in that, The groove structures (5) adopt water guide grooves.
5. The fuel cell end cap structure according to claim 2, characterized in that, Hydrophobic layers are coated on the surfaces of both the first slope (41) and the second slope (42).
6. The fuel cell end cover structure according to claim 5, characterized in that, The hydrophobic layer is made of polyvinylidene fluoride material.
7. The fuel cell end cap structure according to claim 2, characterized in that, The water storage tank (6) is connected to a gas-water separator (9) through a pipeline (8).
8. The fuel cell end cap structure according to claim 7, characterized in that A control valve (7) is provided on the pipeline (8).
9. The fuel cell end cap structure according to claim 8, characterized in that, The control valve (7) adopts a solenoid valve.
10. A fuel cell drainage system, characterized in that Including the fuel cell end cover structure according to any one of claims 1-9.