CN113497255B - Be applied to accurate runner titanium metal joint of hydrogen fuel cell - Google Patents

Abstract

The embodiment of the invention discloses a precise runner titanium metal joint applied to a hydrogen fuel cell. The invention relates to a precise runner titanium metal joint applied to a hydrogen fuel cell, which comprises the following components: the device comprises a galvanic pile shell interface, a mounting handle, a first branch pipe, a saccular channel pipe and a second branch pipe; the electric pile shell interface is arranged on an electric pile shell of the hydrogen fuel cell electric pile to be filled with hydrogen, and is used for providing hydrogen to the inside of the hydrogen fuel cell electric pile; the mounting handle is made of titanium metal materials and is mounted on the galvanic pile shell interface, a first mounting hole is formed in the mounting handle, and the first branch pipe is arranged in the first mounting hole. The precise runner titanium metal joint applied to the hydrogen fuel cell can effectively reduce the fluctuation range of the hydrogen pressure value in the hydrogen fuel cell, thereby improving the working efficiency and the stability of the output voltage of the hydrogen fuel cell.

Description

Be applied to accurate runner titanium metal joint of hydrogen fuel cell

Technical Field

The embodiment of the invention relates to the field of hydrogen fuel cells, in particular to a precise runner titanium metal joint applied to a hydrogen fuel cell.

Background

A hydrogen fuel cell is a device that generates electric power using an electrochemical reaction of hydrogen-oxygen. The hydrogen gas required for the electrochemical reaction of a hydrogen fuel cell has severe conditions such as temperature, humidity, pressure, etc. when the reaction is performed. Under different reaction conditions, the working efficiency of the hydrogen fuel cell has sensitive fluctuation, for example, the pressure value of the input hydrogen can greatly influence the working efficiency of the hydrogen fuel cell, and the stability of the output voltage can also be influenced.

Disclosure of Invention

The embodiment of the invention provides a precise runner titanium metal joint applied to a hydrogen fuel cell, which can effectively reduce the fluctuation range of a hydrogen pressure value in the hydrogen fuel cell through improving the structure, thereby improving the working efficiency and the stability of output voltage of the hydrogen fuel cell.

The embodiment of the invention provides a precise runner titanium metal joint applied to a hydrogen fuel cell, which comprises the following components: the device comprises a galvanic pile shell interface, a mounting handle, a first branch pipe, a saccular channel pipe and a second branch pipe;

the electric pile shell interface is arranged on an electric pile shell of the hydrogen fuel cell electric pile to be filled with hydrogen, and is used for providing hydrogen to the inside of the hydrogen fuel cell electric pile;

the mounting handle is made of titanium metal material and is mounted on the galvanic pile shell interface, a first mounting hole is formed in the mounting handle, and the first branch pipe is arranged in the first mounting hole;

the saccular channel tube is made of elastic materials, an expansion cavity is arranged in the saccular channel tube, air inlets and air outlets are formed in two ends of the expansion cavity, the air inlets of the saccular channel tube are arranged on the first branch tube and are located in the galvanic pile shell, the second branch tube is installed at the air outlets of the saccular channel tube, and the second branch tube is used for transmitting hydrogen input into the hydrogen fuel cell galvanic pile to a preset position.

By adopting the technical scheme, the concrete good sealing effect of the hydrogen fuel cell pile is realized by adopting the titanium material and the precisely machined mounting handle, the capsule channel pipe is arranged at the port of the second branch pipe inside the hydrogen fuel cell pile shell, the functions of slowly pressurizing and slowly depressurizing can be realized, and the pressure fluctuation inside and outside the fuel cell pile shell can be reduced to the minimum by matching with an external pressure stabilizing device, so that the influence of the pressure fluctuation on the electrochemical reaction is reduced to the minimum, and the voltage output is more stable.

In one possible solution, the mounting handle is provided with a plurality of first mounting holes.

By adopting the technical scheme, a plurality of first mounting holes can be formed in the mounting handle, so that a plurality of first branch pipes can be mounted, the hydrogen can be conveyed to different positions by the plurality of first branch pipes, and effective transmission of hydrogen in the electric pile is realized.

In one possible solution, the first branch pipe includes: the straight pipe and the bent pipe are arranged in a staggered manner.

By adopting the technical scheme, the size of the mounting handle is smaller, the design accuracy of the flow channel is higher, and the layout among the first branch pipes is not affected.

In one possible solution, the cross-sectional area of the capsule-shaped channel tube is circular.

By adopting the technical scheme, the cross section area of the saccular channel tube is set to be round, so that the deformation potential of expanding or shrinking is larger, and the buffering effect is better.

In one possible embodiment, the cross-sectional area of the saccular passage tube is elliptical.

By adopting the technical scheme, the saccular channel pipe has the deformation buffering capacity, and on the other hand, due to the oval shape, the deformation process can change in the length direction, the proper deformation can be realized, the sealing effect between the saccular channel pipe and the first branch pipe and the second branch pipe is better, and the slipping caused by expansion deformation is avoided.

In one possible implementation, the method further includes: a positioning plate;

the locating plate is provided with a first through hole, the second branch pipe is arranged in the first through hole, the saccular channel pipe is propped against the locating plate, and the locating plate is used for locating the saccular channel pipe.

By adopting the technical scheme, the saccular channel tube can be positioned, the influence on components and parts inside the galvanic pile due to overlarge deformation of the saccular channel tube is avoided, and meanwhile, when the saccular channel tube deforms, the sealing effect between the saccular channel tube and the positioning plate is better due to mutual extrusion.

In one possible implementation, the method further includes: a limiting gasket;

the limiting gasket is made of elastic materials, a second through hole is formed in the limiting gasket, the second branch pipe is arranged in the second through hole, and the saccular channel pipe abuts against the limiting gasket.

By adopting the technical scheme, the deformation stress of the saccular channel tube is reduced to be too concentrated, and the sealing effect with the second branch tube is affected.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic view of the overall structure of a precision flow path titanium metal joint for a hydrogen fuel cell according to an embodiment of the present invention;

FIG. 2 is an internal structural view of a precision flow channel titanium metal joint for a hydrogen fuel cell in accordance with an embodiment of the present invention;

fig. 3 is a horizontal cross-sectional view of a precision flow path titanium metal joint for a hydrogen fuel cell in accordance with an embodiment of the present invention.

Reference numerals in the drawings:

1. a galvanic pile shell interface; 2. a mounting handle; 3. a first branch pipe; 3', an elbow; 4. a saccular channel tube; 5. a second branch pipe; 6. a positioning plate; 7. and a limiting gasket.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; either directly, or indirectly, through intermediaries, may be in communication with each other, or may be in interaction with each other, unless explicitly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances. The technical scheme of the invention is described in detail below by specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.

In hydrogen fuel cells, the rate of the electrochemical reaction is affected by many factors, such as temperature, humidity, hydrogen pressure, air pressure, etc. The hydrogen pressure input directly affects the distribution and reaction rate of hydrogen in the hydrogen fuel cell stack, and further affects the stability of output voltage, which is important. The stability of the hydrogen pressure input of the current hydrogen fuel cell is often controlled by an external pressure stabilizing valve and other devices. However, the external pressure stabilizing device inevitably generates pressure fluctuation during operation, and the pressure fluctuation of the part has certain influence on electrochemical reaction inside the hydrogen fuel cell stack, such as fluctuation in aspects of hydrogen distribution, reaction rate and the like inside the hydrogen fuel cell, and reflects the fluctuation to output electric energy to influence the quality of the output electric energy.

Fig. 1 is a schematic diagram of the overall structure of a precision flow path titanium metal joint applied to a hydrogen fuel cell according to an embodiment of the present invention, fig. 2 is an internal structural diagram of the precision flow path titanium metal joint applied to the hydrogen fuel cell according to an embodiment of the present invention, and fig. 3 is a horizontal cross-sectional view of the precision flow path titanium metal joint applied to the hydrogen fuel cell according to an embodiment of the present invention.

As shown in fig. 1 to 3, the precise runner titanium metal joint applied to a hydrogen fuel cell provided in the embodiment of the invention includes: the galvanic pile shell comprises a galvanic pile shell interface 1, a mounting handle 2, a first branch pipe 3, a saccular channel pipe 4 and a second branch pipe 5.

The cell stack shell interface 1 is arranged on a cell stack shell of a hydrogen fuel cell stack to be filled with hydrogen, and the cell stack shell interface 1 is used for providing hydrogen into the hydrogen fuel cell stack.

The mounting handle 2 is made of titanium metal material and is mounted on the galvanic pile shell interface 1, a first mounting hole is formed in the mounting handle 2, and the first branch pipe 3 is arranged in the first mounting hole.

The mounting handle 2 is made of titanium and is processed by a five-axis processing center, and has the advantages of high precision, corrosion resistance and good confidentiality.

The bladder channel tube 4 is made of an elastic material, and an expansion cavity is arranged in the bladder channel tube 4, and the expansion cavity is used for acting as a flow channel of fluid on one hand and can be used for expanding to buffer the pressure change rate when the pressure fluctuation occurs in the fluid on the other hand. That is, upon pressure fluctuation, the saccular passage tube 4 may be slowly increased in expansion volume or contracted in volume to be slowly decreased.

Wherein, the two ends of the expansion cavity are provided with an air inlet and an air outlet, and the air inlet of the saccular channel pipe 4 is arranged on the first branch pipe 3 and is positioned in the galvanic pile shell. The first branch pipe 3 serves to access the gas. The second branch pipe 5 is installed at the gas outlet of the bladder-shaped channel pipe 4, and the second branch pipe 5 is used for transmitting the hydrogen gas input into the hydrogen fuel cell stack to a preset position.

By adopting the technical scheme, the concrete good sealing effect of the hydrogen fuel cell pile is realized by adopting the titanium material and the precisely machined mounting handle 2, the capsule channel pipe 4 is arranged at the port of the second branch pipe 5 inside the hydrogen fuel cell pile shell, the functions of slowly pressurizing and slowly depressurizing can be realized, and the pressure fluctuation inside and outside the fuel cell pile shell can be reduced to the minimum by matching with an external pressure stabilizing device, so that the influence of the pressure fluctuation on electrochemical reaction is reduced to the minimum, and the voltage output is more stable.

Alternatively, as shown in fig. 2, the embodiment of the present invention provides a precise runner titanium metal joint applied to a hydrogen fuel cell, and the mounting handle 2 is provided with a plurality of first mounting holes.

By adopting the technical scheme, a plurality of first mounting holes can be formed in the mounting handle 2, so that a plurality of first branch pipes 3 can be mounted, the hydrogen can be conveyed to different positions by the plurality of first branch pipes 3, and the effective transmission of the hydrogen in the galvanic pile is realized.

Optionally, the embodiment of the present invention provides a precise runner titanium metal joint applied to a hydrogen fuel cell, where the first branch pipe 3 includes: a straight pipe and a bent pipe 3', and the straight pipe and the bent pipe 3' are arranged in a staggered way.

In fig. 3, the distinction between straight pipe and bent pipe 3' is only schematically shown.

By adopting the technical scheme, the installation handle 2 is smaller in size, the flow channel is higher in design precision, and meanwhile, the layout among the first branch pipes 3 is not affected.

Alternatively, the embodiment of the invention provides a precise runner titanium metal joint applied to a hydrogen fuel cell, and the cross section area of the saccular channel tube 4 is circular.

By adopting the technical scheme, the cross section area of the saccular channel tube 4 is set to be round, so that the deformation potential of expanding or shrinking is larger, and the buffering effect is better.

Alternatively, the cross-sectional area of the saccular channel tube 4 is elliptical, and the precise runner titanium metal joint is applied to the hydrogen fuel cell.

By adopting the technical scheme, the saccular channel pipe 4 has specific deformation buffering capacity on one hand, and on the other hand, due to the oval shape, the deformation process can change in the length direction, and proper deformation can be achieved, so that the sealing effect between the saccular channel pipe 4 and the first branch pipe 3 and the second branch pipe 5 is better, and slipping caused by expansion deformation is avoided.

Optionally, as shown in fig. 3, the precise runner titanium metal joint applied to the hydrogen fuel cell provided in the embodiment of the invention further includes: and a positioning plate 6.

The positioning plate 6 is provided with a first through hole, the second branch pipe 5 is arranged in the first through hole, the saccular channel pipe 4 is propped against the positioning plate 6, and the positioning plate 6 is used for positioning the saccular channel pipe 4.

By adopting the technical scheme, the saccular channel tube 4 can be positioned, the influence on components and parts inside a galvanic pile caused by overlarge deformation of the saccular channel tube 4 is avoided, and meanwhile, when the saccular channel tube 4 deforms, the sealing effect between the saccular channel tube 4 and the positioning plate 6 is better due to mutual extrusion.

Optionally, the precise runner titanium metal joint applied to the hydrogen fuel cell provided by the embodiment of the invention further comprises: and a limit gasket 7.

The limiting gasket 7 is made of elastic material, a second through hole is formed in the limiting gasket 7, the second branch pipe 5 is arranged in the second through hole, and the saccular channel pipe 4 abuts against the limiting gasket 7.

By adopting the technical scheme, the deformation stress of the saccular passage pipe 4 is reduced to be too concentrated, and the sealing effect with the second branch pipe 5 is affected.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be a direct contact between the first feature and the second feature, or an indirect contact between the first feature and the second feature through an intervening medium.

Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is at a lower level than the second feature.

In the description of the present specification, reference to the description of the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., means that a particular feature, structure, 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, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims (2)

1. A precision flow path titanium metal joint for a hydrogen fuel cell comprising: the device comprises a galvanic pile shell interface, a mounting handle, a first branch pipe, a saccular channel pipe and a second branch pipe;

the electric pile shell interface is arranged on an electric pile shell of the hydrogen fuel cell electric pile to be filled with hydrogen, and is used for providing hydrogen to the inside of the hydrogen fuel cell electric pile;

the mounting handle is made of titanium metal material and is mounted on the galvanic pile shell interface, a first mounting hole is formed in the mounting handle, and the first branch pipe is arranged in the first mounting hole;

the saccular channel pipe is made of elastic materials, an expansion cavity is arranged in the saccular channel pipe, air inlets and air outlets are formed in two ends of the expansion cavity, the air inlets of the saccular channel pipe are arranged on the first branch pipe and are positioned in a galvanic pile shell interface, the second branch pipe is arranged at the air outlets of the saccular channel pipe, and the second branch pipe is used for transmitting hydrogen input into a hydrogen fuel cell galvanic pile to a preset position; the mounting handle is provided with a plurality of first mounting holes; the first branch pipe includes: the straight pipe and the bent pipe are arranged in a staggered manner;

the cross section area of the saccular channel tube is elliptical;

further comprises: a positioning plate;

the locating plate is provided with a first through hole, the second branch pipe is arranged in the first through hole, the saccular channel pipe is propped against the locating plate, and the locating plate is used for locating the saccular channel pipe.

2. The precision flow path titanium metal joint of claim 1, further comprising: a limiting gasket;

the limiting gasket is made of elastic materials, a second through hole is formed in the limiting gasket, the second branch pipe is arranged in the second through hole, and the saccular channel pipe abuts against the limiting gasket.

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