Integrated sealing ring for fuel cell stack
By integrating the sealing functions of hydrogen, air and coolant through an integrated sealing ring design, the complexity and leakage problems of traditional fuel cell stack sealing designs are solved, achieving high-efficiency sealing performance and a simplified installation process.
Patent Information
- Application Number
- CN202520028792.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-01-07
AI Technical Summary
Traditional fuel cell stacks employ multiple independent sealing rings in their sealing design, which leads to complex installation, unstable sealing, difficult maintenance, and the risk of leakage.
It adopts an integrated sealing ring design, including first, second and third sealing ring bodies, connecting ribs and anti-detachment protrusions, which are integrally molded by mold. It uses materials such as fluororubber, EPDM rubber or silicone, and is designed with a wave shape to adapt to different interfaces, integrating the sealing functions of hydrogen, air and coolant.
It simplifies the installation process, improves sealing performance, reduces maintenance costs, extends service life, and ensures the safety and stability of the fuel cell stack.
Smart Images
Figure CN223858150U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to fuel cell sealing technical field especially relates to a kind of integrated sealing ring for fuel cell stack. BACKGROUND
[0002] As a kind of efficient, environmentally friendly energy conversion equipment, the performance of fuel cell is influenced by multiple factors, and sealing design is crucial in ensuring the effective isolation of hydrogen, air and coolant. Traditional sealing design often uses multiple independent sealing rings, although these designs can achieve sealing to some extent, but there are several significant defects:
[0003] Installation complexity: the installation process of multiple independent sealing rings requires high-precision alignment and adjustment, increasing the time and difficulty of production and assembly.
[0004] Sealing instability: independent sealing rings may age, deform and wear under high temperature and high pressure, leading to sealing performance degradation and leakage problems.
[0005] High maintenance difficulty: when leakage occurs, multiple sealing rings need to be checked and replaced one by one, resulting in prolonged maintenance time and increased cost.
[0006] In order to overcome the above problems, it is necessary to develop an integrated sealing ring design. SUMMARY
[0007] The utility model provides a kind of integrated sealing ring for fuel cell stack, can simplify sealing structure, improve sealing performance and reduce maintenance cost, to solve the technical problem mentioned in background art.
[0008] The technical scheme of the utility model is as follows: an integrated sealing ring for fuel cell stack, comprising: a first sealing ring body, a second sealing ring body and a third sealing ring body, a connecting rib is arranged between the first sealing ring body and the second sealing ring body, and between the second sealing ring body and the third sealing ring body, the front and back of the first sealing ring body, the second sealing ring body and the third sealing ring body are wavy, and the first sealing ring body, the second sealing ring body and the third sealing ring body are respectively matched with the shape of hydrogen inlet, air inlet and cooling liquid inlet of fuel cell stack.
[0009] Further, the side of the first sealing ring body, the second sealing ring body and the third sealing ring body is provided with anti-falling protrusion.
[0010] Further, the first sealing ring body, the second sealing ring body, the third sealing ring body, the connecting rib and the anti-falling protrusion are integrally formed by mold.
[0011] Further, the material of the first sealing ring body, the second sealing ring body, the third sealing ring body and the connecting rib includes one of fluororubber, ethylene propylene diene rubber and silica gel.
[0012] Further, the front surface and the back surface of the first sealing ring body, the second sealing ring body and the third sealing ring body are provided with three wave crests and two wave troughs, the wave crests of the front surface correspond to the wave crests of the back surface, and the wave troughs of the front surface correspond to the wave troughs of the back surface.
[0013] Further, two connecting ribs are arranged between the first sealing ring body and the second sealing ring body, and two connecting ribs are arranged between the second sealing ring body and the third sealing ring body.
[0014] Further, the thicknesses of the first sealing ring body, the second sealing ring body and the third sealing ring body are equal.
[0015] Further, the thickness of the connecting rib is less than the thickness of the first sealing ring body.
[0016] The utility model discloses a sealing ring for fuel cell stack, which comprises a first sealing ring body, a second sealing ring body and a third sealing ring body. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is the front surface structure schematic drawing of the utility model.
[0018] Figure 2 It is a section structure schematic drawing of the utility model.
[0019] Figure 3 It is another section structure schematic drawing of the utility model. DETAILED DESCRIPTION
[0020] In order to make the person skilled in the art better understand the utility model scheme, the technical scheme in the utility model embodiment will be described clearly and completely below in conjunction with the drawings in the utility model embodiment, and the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the utility model.
[0021] In the technical scheme of the utility model, Figure 1It is a structure diagram provided according to the specific structure of the integrated sealing ring for the fuel cell stack of the utility model, as shown in the figure, Figure 1 The technical scheme of the utility model specifically includes:
[0022] The first sealing ring body 1, the second sealing ring body 2 and the third sealing ring body 3 are provided with connecting ribs 4 between the first sealing ring body 1 and the second sealing ring body 2 and between the second sealing ring body 2 and the third sealing ring body 3, the front surface and the back surface of the first sealing ring body 1, the second sealing ring body 2 and the third sealing ring body 3 are wave-shaped, and the first sealing ring body 1, the second sealing ring body 2 and the third sealing ring body 3 are respectively matched with the shapes of the hydrogen inlet, the air inlet and the cooling liquid inlet of the fuel cell stack.
[0023] In an embodiment of the utility model, the side surface of the first sealing ring body 1, the second sealing ring body 2 and the third sealing ring body 3 is provided with anti-falling protrusions 5.
[0024] In an embodiment of the utility model, the first sealing ring body 1, the second sealing ring body 2, the third sealing ring body 3, the connecting rib 4 and the anti-falling protrusion 5 are integrally formed by a mold.
[0025] In an embodiment of the utility model, the material of the first sealing ring body 1, the second sealing ring body 2, the third sealing ring body 3 and the connecting rib 4 includes one of fluorine rubber, ethylene-propylene-diene rubber and silica gel.
[0026] In an embodiment of the utility model, the front surface and the back surface of the first sealing ring body 1, the second sealing ring body 2 and the third sealing ring body 3 are provided with three wave crests and two wave troughs, the wave crests of the front surface correspond to the wave crests of the back surface, and the wave troughs of the front surface correspond to the wave troughs of the back surface.
[0027] In an embodiment of the utility model, the connecting rib 4 between the first sealing ring body 1 and the second sealing ring body 2 is provided with two, and the connecting rib 4 between the second sealing ring body 2 and the third sealing ring body 3 is provided with two.
[0028] In an embodiment of the utility model, the thickness of the first sealing ring body 1, the second sealing ring body 2 and the third sealing ring body 3 is equal.
[0029] In an embodiment of the utility model, the thickness of the connecting rib 4 is less than the thickness of the first sealing ring body 1.
[0030] The utility model discloses a kind of high elasticity, corrosion-resistant material (such as fluorine rubber, ethylene-propylene rubber, silica gel or new composite material), hydrogen, air and the sealing function of cooling liquid are integrated together in design.The shape is accurately designed to adapt to different interfaces and ensure sealing effect.The material obtained by the utility model can be quickly formed, and production cycle is shortened.The high fluidity of the material makes injection molding or die casting more efficient, reducing raw material waste.
[0031] The inner and outer shapes of the sealing ring are optimized (wavy structure), which can maintain good sealing performance under different pressure and temperature conditions, prevent medium leakage and mixing. With the convex structure of the edge, the sealing ring can be effectively prevented from falling off during installation and use.
[0032] The utility model discloses by adopting mold, multiple sealing functions are integrated in the same mold for integrated molding, which avoids subsequent assembly process and reduces production complexity.
[0033] The integrated design of the utility model reduces assembly steps, simplifies installation and replacement process, improves production efficiency and reduces operation risk.
[0034] The integrated sealing ring of the utility model can ensure that hydrogen, air and cooling liquid are effectively isolated at inlet and outlet, prevent leakage and mixing, and thus improve overall sealing reliability.
[0035] The utility model reduces the number of contact surfaces and moving parts, and the integrated design significantly reduces wear and prolongs the service life of the sealing ring.
[0036] The utility model can adapt to thermal expansion and shrinkage of fuel cell during working process, maintain stable sealing performance, and thus improve the overall stability of the stack.
[0037] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solutions of the utility model and are not limited. Although the utility model is described in detail with reference to examples, those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the utility model, which should be covered in the scope of claims of the utility model.
Claims
1. An integrated seal ring for a fuel cell stack, characterized by, The application relates to a fuel cell sealing ring, which comprises a first sealing ring body (1), a second sealing ring body (2) and a third sealing ring body (3), connecting ribs (4) are arranged between the first sealing ring body (1) and the second sealing ring body (2) and between the second sealing ring body (2) and the third sealing ring body (3), the front surface and the back surface of the first sealing ring body (1), the second sealing ring body (2) and the third sealing ring body (3) are in a wave shape, and the first sealing ring body (1), the second sealing ring body (2) and the third sealing ring body (3) are respectively matched with the shapes of hydrogen inlets, air inlets and cooling liquid inlets of a fuel cell stack. The side surfaces of the first sealing ring body (1), the second sealing ring body (2) and the third sealing ring body (3) are provided with anti-falling protrusions (5).
2. The integrated gasket for a fuel cell stack of claim 1, wherein, The first sealing ring body (1), the second sealing ring body (2), the third sealing ring body (3), the connecting ribs (4) and the anti-falling protrusions (5) are integrally formed by a mold.
3. The integrated gasket for a fuel cell stack of claim 2, wherein, The materials of the first sealing ring body (1), the second sealing ring body (2), the third sealing ring body (3) and the connecting ribs (4) comprise one of fluorine rubber, ethylene-propylene-diene rubber and silica gel.
4. The integrated gasket for a fuel cell stack of claim 1, wherein, The front surface and the back surface of the first sealing ring body (1), the second sealing ring body (2) and the third sealing ring body (3) are respectively provided with three wave crests and two wave troughs, the wave crests of the front surface correspond to the wave crests of the back surface, and the wave troughs of the front surface correspond to the wave troughs of the back surface.
5. The integrated gasket for a fuel cell stack of claim 1 wherein, Two connecting ribs (4) are arranged between the first sealing ring body (1) and the second sealing ring body (2), and two connecting ribs (4) are arranged between the second sealing ring body (2) and the third sealing ring body (3).
6. The integrated gasket for a fuel cell stack of claim 1, wherein, The thicknesses of the first sealing ring body (1), the second sealing ring body (2) and the third sealing ring body (3) are equal.
7. The integrated gasket for a fuel cell stack of claim 1 wherein, The thickness of the connecting rib (4) is smaller than the thickness of the first sealing ring body (1).
8. The integrated gasket for a fuel cell stack of claim 7, wherein,