CN216958106U - Cooling pipeline structure of fuel cell - Google Patents

Abstract

A cooling pipe structure of a fuel cell, comprising: a first cooling line located within a stack of the fuel cell; a second cooling line located outside the cell stack; and the connecting pipe is connected with the first cooling pipeline and the second cooling pipeline, the connecting pipe is respectively provided with an O-shaped ring groove at the position of connecting the first cooling pipeline and the second cooling pipeline, the connecting pipe is in sealing connection with the first cooling pipeline and the second cooling pipeline through an O-shaped ring positioned in the O-shaped ring groove, and the surface roughness of the O-shaped ring groove is greater than that of other parts of the connecting pipe. The cooling pipeline structure of the fuel cell connects the inner pipeline and the outer pipeline of the fuel cell in a floating way by the connecting pipe, provides a simplified assembly structure, reduces the manufacturing cost, can save the assembly time, and is beneficial to the miniaturization and the light weight of a fuel cell system.

Description

Cooling pipeline structure of fuel cell

Technical Field

The present invention relates to a cooling pipe structure of a fuel cell.

Background

In recent years, with the restrictions of vehicle exhaust gas regulations and carbon dioxide/fuel efficiency regulations, it is required to achieve both dry purification of engine exhaust gas and improvement in efficiency of fuel consumption. The construction of safe cities and human habitats is enhanced in all countries to enhance the containment and sustainable urban construction, sustainable human habitats planning and management capabilities of all countries. There is therefore a need in all countries to enhance the provision of safe, affordable, easy to use, sustainable transportation systems to all, to improve traffic safety and road safety, in particular to expand public transportation, to reduce the negative environmental impact of everyone in a city, including special concerns about air quality, and municipal waste management, etc. In the transportation field, in the vehicle manufacturing industry, it is urgently required to take measures against environmental issues to develop a technology capable of improving the improvement rate of global energy efficiency.

Conventionally, there is a fuel cell vehicle in which a motor is driven by electric power supplied from a fuel cell. Known fuel cells include various pipes penetrating the stack, for example, a coolant supply pipe and a coolant discharge pipe, which allow a coolant to flow therein and are connected to external pipes. However, the known fuel cell system has a complicated piping structure, a large number of parts, a high manufacturing cost, and a large number of assembling man-hours.

SUMMERY OF THE UTILITY MODEL

The utility model provides a cooling pipeline structure of a fuel cell, which connects an internal pipeline and an external pipeline of the fuel cell by a connecting pipe in a floating way, provides a simplified assembly structure, reduces the manufacturing cost, can save the assembly time and is beneficial to the miniaturization and the light weight of a fuel cell system.

The cooling pipe structure of the fuel cell of the present invention includes: a first cooling line located within a stack of the fuel cell; a second cooling line located outside the cell stack; and the connecting pipe is connected with the first cooling pipeline and the second cooling pipeline, the connecting pipe is respectively provided with an O-shaped ring groove at the position of connecting the first cooling pipeline and the second cooling pipeline, the connecting pipe is in sealing connection with the first cooling pipeline and the second cooling pipeline through an O-shaped ring positioned in the O-shaped ring groove, and the surface roughness of the O-shaped ring groove is greater than that of other parts of the connecting pipe.

In order to make the aforementioned and other features and advantages of the utility model more comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 shows a cooling pipe structure of a fuel cell according to an embodiment of the present invention.

Fig. 2 is a perspective view of the connection pipe of fig. 1.

Fig. 3 is a sectional view of the connection pipe of fig. 1.

Description of the reference numerals

100: fuel cell

102: cell stack

110: first cooling pipeline

112: supply pipe

114: discharge pipe

122: supply manifold

124: discharge manifold

130: second cooling pipeline

132. 134: external manifold

140. 150: connecting pipe

142a, 142 b: end of connecting pipe

144a, 144 b: o-shaped ring groove

146a, 146 b: o-shaped ring

Detailed Description

Embodiments of the present invention are described below with reference to the drawings.

The drawings are for easy understanding of the present invention and show only the main structure, and the structure or specific shape thereof which does not affect the understanding of the technical means of the present invention may be omitted. In different embodiments, the same reference signs are used for the same or similar elements to facilitate comparison and understanding. In the following description, up, down, left, right, front, and rear are based on the direction viewed by the user. In addition, the cooling circuit structure shown in the following embodiments is taken as an example, only the part related to the technical solution of the present application is expressed, and appropriate simplification is made to facilitate clear description of the technical solution of the present application. It will be appreciated by those skilled in the art that the teachings of the present application can be applied with equal benefit to similar devices.

Fig. 1 shows a cooling pipe structure of a fuel cell according to an embodiment of the present invention. The fuel cell 100 of the present embodiment includes, for example, a cell stack 102 composed of a plurality of cell units, and the fuel cell 100 is provided therein with a first cooling pipe 110, in which a cooling medium (e.g., cooling water) can flow, so as to cool the fuel cell 100. For example, the first cooling pipe 110 in the fuel cell 100 includes at least a supply pipe 112 penetrating the cell stack 102 and used for supplying the cooling medium, a discharge pipe 114 penetrating the cell stack 102 and used for discharging the cooling medium, and a supply manifold 122 and a discharge manifold 124 formed on the cell stack end cover 104 by respectively communicating the supply pipe 112 and the discharge pipe 114.

In addition, a second cooling pipe 130 is provided outside the cell stack 102, and includes external manifolds 132 and 134 respectively connecting the supply manifold 122 and the discharge manifold 124, for supplying the cooling medium from the outside of the cell stack 110 into the cell stack 110 along the external manifolds 132 and 122, and discharging the cooling medium in the cell stack 110 to the outside of the cell stack 110 along the discharge manifold 124 and the external manifold 134. In this way, a circulation line through which the cooling medium flows can be formed inside the cell stack 110. Of course, the specific configuration and number of cooling channels may vary depending on the actual configuration of the fuel cell.

In order to connect the supply manifold 122 and the discharge manifold 124 to the corresponding external manifolds 132 and 134, the present embodiment provides connecting pipes 140 and 150 between the supply manifold 122 and the external manifolds 132 and between the discharge manifold 124 and the external manifolds 134, respectively. The connecting pipes 140 and 150 of the present embodiment may have the same or similar structure, and the connecting pipe 140 is taken as an example for description.

Referring to fig. 1 to fig. 3, fig. 2 is a perspective view of the connection tube 140, and fig. 3 is a cross-sectional view of the connection tube 140. The connecting pipe 140 has opposite ends 142a and 142b connected to the supply manifold 122 and the external manifold 132, respectively, and has O- ring grooves 144a and 144b on the opposite ends 142a and 142b, respectively. O- rings 146a and 146b, as shown in FIG. 1, may be disposed in the O- ring grooves 144a and 144b, respectively. In assembly, the connection portion can be sealed by elastic deformation of the O- rings 146a and 146b by merely butting the two end portions 142a and 142b of the connection pipe 140 against the supply manifold 122 and the external manifold 132 in a floating connection manner.

In addition, in order to prevent the O- rings 146a and 146b from sliding with respect to the connection pipe 140, the surface roughness of the O- ring grooves 144a and 144b of the present embodiment is larger than that of the other portions of the connection pipe 140. In this manner, an effective seal between the connecting tube 140 and the supply and external manifolds 122, 132 may be ensured. In this embodiment, the surface roughness of the O- ring grooves 144a and 144b can be changed by machining the inner surfaces of the O- ring grooves 144a and 144b or by inserting a molded metal or other material sleeve into the O- ring grooves 144a and 144 b. On the other hand, considering that the surroundings of the stack 102 and the stack end cover 104 may be charged or damp, the connection pipe 140 may be made of a non-metal or insulating material in this embodiment, so as to prevent the connection pipe 140 from rusting after being wetted, or generating an electrical leakage or a short circuit.

Based on the above description, the connecting tube 150 and its corresponding discharge manifold 124 and external manifold 134 may adopt similar structures and materials, which are not described herein again.

In summary, the cooling pipeline structure of the present invention forms the O-ring groove at the connection end of the connection pipe and forms the floating connection by the corresponding O-ring, so that the assembly structure can be simplified, the manufacturing cost and the assembly time can be reduced, and the miniaturization and the light weight of the fuel cell system can be facilitated. In addition, although the foregoing embodiments have been described with reference to cooling pipes as an example, in practice, the technical solution of the present invention can also be applied to connecting pipes at various possible positions in the fuel cell system to obtain similar technical effects.

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; while the utility model has been described in detail and with reference to the foregoing embodiments, it will 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; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (1)

1. A cooling pipe structure of a fuel cell, characterized by comprising:

a first cooling line located within a stack of the fuel cell;

a second cooling line located outside the cell stack; and

the connecting pipe is provided with O-shaped ring grooves at the positions for connecting the first cooling pipeline and the second cooling pipeline respectively, and is in sealing connection with the first cooling pipeline and the second cooling pipeline through O-shaped rings positioned in the O-shaped ring grooves, wherein the surface roughness of the O-shaped ring grooves is greater than that of other parts of the connecting pipe.

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