CN219597824U - Micro-channel composite bipolar plate mold for cold press molding - Google Patents

Abstract

The utility model discloses a cold-press molding micro-channel composite bipolar plate mold, which comprises: the first die holder and the second die holder are opposite; a first die, a discharging frame and a demoulding module are sequentially arranged between the first die holder and the second die holder; the first die holder is fixedly connected with the first die and is in sliding connection with the discharging frame; the first mould is provided with a micro-channel structure, and the micro-channel structure comprises: the first main runner and the second main runner are arranged in parallel; the first main flow channel is communicated with the second main flow channel through a plurality of first shunt channels; a second sub-runner is formed at the joint of the first sub-runner and the first main runner; the radius of the second sub-runner is smaller than that of the first sub-runner. The utility model can balance the gas in the flow channel by arranging the micro-flow channel structure, prevent the condensation of water vapor during the reaction and improve the performance of the bipolar plate.

Description

Micro-channel composite bipolar plate mold for cold press molding

Technical Field

The utility model relates to the technical field of bipolar plate processing, in particular to a cold-press molding micro-channel composite bipolar plate mold.

Background

The bipolar plate accounts for more than 60 percent of the total specific gravity of the whole proton exchange membrane fuel cell stack, accounts for more than 30 percent of the total manufacturing cost of the whole cell, is one of core components of the proton exchange membrane cell, is positioned at the outermost layer of the whole cell building monomer structure, and plays roles in supporting the cell stack, collecting current, radiating heat, conveying reaction gas and the like. With the development of technology, the flow channel design of the bipolar plate has been changed from the traditional mold to a more advanced parallel flow channel design, and the design not only can meet the requirements of a micro-flow channel structure, but also can effectively reduce the defects brought by the bipolar plate in application, because gas and water are conveyed through the flow channel in a semiconductor, and the gas and the water are also a great key for the bipolar plate and even the fuel cell to play roles, but the parallel flow channel mold has a relatively single structure, and the gas is easily unevenly distributed in the flow channel, so that water vapor is condensed in a pipeline to prevent the conveying of the gas, and further the efficiency of the bipolar plate is seriously affected.

Disclosure of Invention

In view of the above, the utility model aims to provide a cold-press molding micro-channel composite bipolar plate mold, which has a simple and reasonable structure, and can balance gas in a channel through the arrangement of a micro-channel structure, prevent water vapor condensation during reaction and improve the performance of a bipolar plate.

A cold-press formed micro-fluidic channel composite bipolar plate mold comprising: the first die holder and the second die holder are opposite; a first die, a discharging frame and a demoulding module are sequentially arranged between the first die holder and the second die holder; the first die holder is fixedly connected with the first die and is in sliding connection with the discharging frame; the first mould is provided with a micro-channel structure, and the micro-channel structure comprises: the first main runner and the second main runner are arranged in parallel; the first main flow channel is communicated with the second main flow channel through a plurality of first shunt channels; a second sub-runner is formed at the joint of the first sub-runner and the first main runner; the radius of the second sub-runner is smaller than that of the first sub-runner.

In the technical scheme, the second sub-runner with the radius smaller than that of the first sub-runner is formed at the joint of the first sub-runner and the first main runner, so that the pressure of the first main runner can be increased, the pressure of the second main runner can be reduced, the relative difference of pressure drops between the first sub-runners is reduced, the distribution of gas in the whole runner in the transmission process is balanced, the water vapor condensation is prevented when the water drainage performance is improved, and the gas utilization rate and the water drainage capacity are greatly improved, so that the performance of the bipolar plate is improved.

As a preferable technical scheme of the utility model, the first sub-channels are arranged in parallel and uniformly arranged between the first main channel and the second main channel.

In the technical scheme, the first sub-runners are uniformly arranged in parallel, so that uniform distribution of gas in the whole runner structure can be ensured, and the utilization rate of the gas is improved.

As a preferable technical scheme of the utility model, the first diversion channels are divided by a flow plate; one end of the flow plate, which is close to the first main flow channel, is in an inverted T shape, and the other end of the flow plate extends along the direction perpendicular to the second main flow channel.

In the above technical scheme, one end of the flow plate is of an inverted T shape, and a convex part formed on one side of the inverted T can play a role in turbulent flow on one hand, and on the other hand, the pressure drop of the first main flow channel relative to the second main flow channel is larger, so that the efficiency of the bipolar plate is improved.

As a preferable technical scheme of the utility model, the middle part of the first die holder is provided with a plug hole; the first die is provided with an inserting block matched with the inserting hole.

In the technical scheme, the connection stability of the first die holder and the first die can be ensured through the arrangement of the matched plug holes and plug blocks.

As a preferable technical scheme of the utility model, four corners of the first die holder are also provided with guide posts, and the guide posts extend along the direction of the discharging frame; the discharging frame is provided with a guide hole matched with the guide column.

Among the above-mentioned technical scheme, first die holder pass through the guide post with the guiding hole of blowing frame is connected, through the sliding fit of guide post and guiding hole, can remove first die holder to blowing frame direction to drive first mould and extrude to blowing frame direction, the reuse of whole mould has been guaranteed in the setting of guide post and guiding hole, has improved the practicality.

As a preferable technical scheme of the utility model, one side of the demoulding module is fixedly connected with the discharging frame, and the other side of the demoulding module is fixedly connected with the second mould base.

As a preferred embodiment of the present utility model, the demolding module includes: the demolding pad, the limiting plate and the elastic group are sequentially wrapped in the demolding frame; two ends of one side of the limiting plate are fixedly connected to the second die holder through a bracket; the elastic group comprises a plurality of springs and is arranged on the inner side of the bracket, and through holes matched with the springs are formed in the limiting plate; one end of the spring is fixedly connected with the second die holder, and the other end of the spring passes through the through hole and contacts with the demoulding backing plate.

In the technical scheme, the demolding base plate is arranged, so that the stress of the composite material in the pressing process is uniform, and the molding of the composite material is ensured; the limiting plate is arranged, so that the pressing depth of the composite material can be limited on one hand, and the size of the composite material can be limited on the other hand; the whole plate is slowly lifted on the same horizontal plane through the elastic groups, and finally is ejected out of the discharging frame.

As a preferable technical scheme of the utility model, the springs are distributed in an array.

In the above technical scheme, the evenly that the drawing of patterns backing plate atress can be guaranteed in the spring setting of array distribution, and can improve spring resilience speed fast, circulated use many times in the short time provides the availability factor of mould.

As a preferable technical scheme of the utility model, a placing through groove is formed in the middle of the discharging frame, and the shape and the size of the placing through groove are matched with those of the first die.

In the above technical scheme, the first die matched with the placing through groove can ensure the stability of the lamination of the composite material, so that the composite material can be molded conveniently.

As a preferable technical scheme of the utility model, the demoulding pad is movably arranged between the demoulding frame and the placing through groove; the shape and the size of the demoulding backing plate are matched with those of the placing through groove.

According to the technical scheme, the demolding base plate is movably arranged between the demolding frame and the placing through groove, the lower surface of the demolding base plate is uniformly stressed in the compression and rebound process, the return stroke of the upper die is slow in demolding, the micro-channel composite bipolar plate is guaranteed to gradually rise under the action of the elastic force of the spring group, and finally the micro-channel composite bipolar plate is directly ejected into the discharging frame, so that the micro-channel composite bipolar plate product with coordinated appearance and excellent performance can be obtained.

Compared with the prior art, the utility model has the beneficial effects that:

the second sub-runner with the radius smaller than that of the first sub-runner is formed at the joint of the first sub-runner and the first main runner, so that the pressure of the first main runner can be increased, the pressure of the second main runner can be reduced, the relative difference of pressure drops between the first sub-runners is reduced, the distribution of gas in the whole runner in the transmission process is balanced, the water drainage performance is improved, the water vapor condensation is prevented when the reaction occurs, and the gas utilization rate and the water drainage capability are greatly improved, so that the performance of the bipolar plate is improved.

In conclusion, the micro-channel die can well improve the water management problem of the bipolar plate, and effectively avoid the flooding phenomenon.

Drawings

Fig. 1 is an exploded front view of a cold press molded micro flow channel composite bipolar plate mold according to this embodiment.

Fig. 2 is a schematic view of a micro flow channel structure in a first mold.

Fig. 3 is an enlarged schematic view of the portion a in fig. 2.

Fig. 4 is a top view of the first die holder.

FIG. 5 is a top view of a discharge frame

Fig. 6 is an exploded side view of the cold-press molded micro flow channel composite bipolar plate mold of the present embodiment.

Reference numerals illustrate:

the die comprises a first die holder 100, a plug hole 101, a guide column 102, a second die holder 200, a first die 300, a first main runner 301, a second main runner 302, a first sub runner 303, a second sub runner 304, a flow plate 305, a plug block 306, a discharging frame 400, a guide hole 401, a placing through groove 402, a demoulding module 500, a demoulding backing plate 501, a demoulding frame 502, a limiting plate 503, an elastic group 504 and a support 505.

Detailed Description

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the utility model. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Referring to fig. 1 to 3, in a preferred embodiment, a cold-press molding micro-channel composite bipolar plate mold includes: the first die holder 100 and the second die holder 200 are opposite; a first die 300, a discharging frame 400 and a demoulding module 500 are sequentially arranged between the first die holder 100 and the second die holder 200; the first die holder 100 is fixedly connected with the first die 300 and is slidably connected with the discharging frame 400; the first mold 300 is provided with a micro flow channel structure, and the micro flow channel structure includes: a first main flow passage 301 and a second main flow passage 302 arranged in parallel; the first main runner 301 and the second main runner 302 are communicated through a plurality of first sub runners 303; a second sub-runner 304 is formed at the connection part of the first sub-runner 303 and the first main runner 301; the radius of the second sub-runner 304 is smaller than that of the first sub-runner 303.

In this embodiment, the first main flow channel 301 may be an inflow channel; the second primary flow channel 302 may be a flow channel.

In the specific implementation process, by forming the second sub-runner 304 with the radius smaller than that of the first sub-runner 301 at the joint of the first sub-runner 303 and the first main runner 301, the pressure of the first main runner 301 can be increased, the pressure of the second main runner 302 can be reduced, the relative difference of pressure drops between the first sub-runners 303 is reduced, the distribution of gas in the whole runner in the transmission process is balanced, the water vapor condensation is prevented when the water discharge performance is improved, and the utilization rate and the water discharge capability of the gas are greatly improved, so that the performance of the bipolar plate is improved.

In this embodiment, the first sub-channels 303 are arranged in parallel, and are uniformly arranged between the first main channel 301 and the second main channel 302.

In the specific implementation process, the first sub-runners 303 are uniformly arranged in parallel, so that uniform distribution of gas in the whole runner structure can be ensured, and the utilization rate of the gas can be improved.

In this embodiment, in the micro flow channel structure, the width of the first main flow channel 301 and the second main flow channel 302 is 2.00 mm, and the depth is 1.00 mm; the first sub-flow channels 303 have a depth, width and ridge width of 1.00 and mm; the second runner 304 has a width of 0.20 mm and a depth of 1.00 mm.

In this embodiment, the first sub-channels 303 are divided by a flow plate 305; one end of the flow plate 305, which is close to the first main flow channel 301, is inverted T-shaped, and the other end extends along a direction perpendicular to the second main flow channel 302.

In a specific implementation process, one end of the flow plate 305 is inverted T-shaped, and a convex portion formed on one side of the inverted T can play a role in turbulence on one hand, and on the other hand, the pressure drop of the first main flow channel 301 relative to the second main flow channel 302 is larger, so that the efficiency of the bipolar plate is improved.

In this embodiment, a plug hole 101 is disposed in the middle of the first die holder 100; the first mold 300 is provided with a plug block 306 adapted to the plug hole 101.

Referring to fig. 4, in the implementation process, the connection stability between the first die holder 100 and the first die 300 can be ensured through the arrangement of the matched plug hole 101 and plug block 306.

In this embodiment, guide posts 102 are further disposed at four corners of the first die holder 100, and the guide posts 102 extend along the direction of the discharging frame 400; the discharging frame 400 is provided with a guiding hole 401 adapted to the guiding column 102.

Referring to fig. 1, fig. 6, and fig. 5, in the implementation process, the first die holder 100 is connected with the guide hole 401 of the discharging frame 400 through the guide post 102, and the first die holder 100 can be moved towards the discharging frame 400 through the sliding fit between the guide post 102 and the guide hole 401, so as to drive the first die 300 to extrude towards the discharging frame 400, and the arrangement of the guide post 102 and the guide hole 401 ensures the recycling of the whole die, thereby improving the practicability.

Referring to fig. 1 and 6, in this embodiment, one side of the demolding module 500 is fixedly connected to the discharging frame 400, and the other side is fixedly connected to the second mold holder 200.

In this embodiment, the demolding module 500 includes: a demoulding pad 501, a limiting plate 503 and an elastic group 504 which are sequentially wrapped in a demoulding frame 502; two ends of one side of the limiting plate 503 are fixedly connected to the second die holder 200 through a bracket 505; the elastic set 504 includes a plurality of springs, and is disposed inside the bracket 505, and the limiting plate 503 is formed with a through hole adapted to the springs; one end of the spring is fixedly connected with the second die holder 200, and the other end of the spring passes through the through hole and contacts with the demolding pad 501.

In the specific implementation process, the demolding pad 501 is arranged, so that the stress of the composite material in the pressing process is uniform, and the molding of the composite material is ensured; the limiting plate 503 can limit the pressing depth of the composite material on one hand and limit the size of the composite material on the other hand; by providing the elastic set 504, the whole plate slowly rises on the same horizontal plane and finally is ejected into the discharging frame 400.

In this embodiment, the springs are distributed in an array.

In the concrete implementation process, the evenly stressed demolding base plate 501 can be guaranteed through the arrangement of the springs distributed in the array mode, the rebound speed of the springs can be improved, the springs can be recycled for many times in a short time, and the service efficiency of the mold is improved.

In this embodiment, a placement through groove 402 is formed in the middle of the discharging frame 400, and the shape and size of the placement through groove 402 are adapted to the shape and size of the first mold 300.

In a specific implementation process, the first mold 300 adapted to the placement through groove 402 can ensure the lamination stability of the composite material, so as to facilitate the molding of the composite material.

In this embodiment, the stripper plate 501 is movably disposed between the stripper frame 502 and the placement through-slot 402; the demolding pad 501 is matched with the placing through groove 402 in shape and size.

In the specific implementation process, the demolding base plate 501 is movably arranged between the demolding frame 502 and the placing through groove 402, in the compression and rebound process, the lower surface of the demolding base plate 501 is uniformly stressed, the return stroke of an upper die is slow during demolding, the micro-channel composite bipolar plate is ensured to gradually rise under the action of the elastic force of the spring group, and finally the micro-channel composite bipolar plate is directly ejected into the discharging frame 400, so that the micro-channel composite bipolar plate product with coordinated appearance and excellent performance can be obtained.

It is understood that the utility model has low production cost, the cold press molding process can be operated at normal temperature, heating is not needed, the operation time is short, a large amount of manpower and material resources are saved, and batch production can be satisfied.

The working principle of the utility model is as follows: specifically, when the bipolar plate is used, all parts of the cleaned die are assembled into a whole according to the sequence of the second die holder 200, the elastic group 504, the limiting plate 503, the demolding base plate 501, the demolding frame 502, the discharging frame 400, the first die 300 and the first die holder 100, then the first die holder 100 and the second die holder 200 are respectively connected with a hydraulic press, composite materials are uniformly poured into the discharging frame 400 and pre-pressed and paved, the first die 300 is slowly pressed down and gradually matched with the first die 300, the first die holder 100 and the discharging frame 400 collide and are tightly attached together, the springs are compressed, the composite materials are cured into a composite bipolar plate with certain hardness, the first die 300 is slowly lifted, the lower surface of the demolding base plate 501 is uniformly stressed in the compression and rebound processes, the return stroke of the upper die is slow during demolding, the micro-channel composite bipolar plate is gradually lifted under the action of the elasticity of the spring group, and finally the bipolar plate is directly ejected into the discharging frame 400, and the micro-channel composite bipolar plate product with coordinated appearance and excellent performance can be obtained.

In the description of the present utility model, it should be understood that the terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present utility model 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 utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

While the utility model has been described in conjunction with the specific embodiments above, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, all such alternatives, modifications, and variations are included within the spirit and scope of the following claims.

Claims (10)

1. The utility model provides a cold press molding's micro channel compound bipolar plate mould which characterized in that includes:

a first die holder (100) and a second die holder (200) which are opposite to each other;

a first die (300), a discharging frame (400) and a demoulding module (500) are sequentially arranged between the first die holder (100) and the second die holder (200);

the first die holder (100) is fixedly connected with the first die (300) and is in sliding connection with the discharging frame (400);

a micro flow channel structure is provided on the first mold (300), the micro flow channel structure including:

a first main flow passage (301) and a second main flow passage (302) arranged in parallel; the first main runner (301) is communicated with the second main runner (302) through a plurality of first sub-runners (303); a second sub-runner (304) is formed at the joint of the first sub-runner (303) and the first main runner (301); the radius of the second sub-channel (304) is smaller than that of the first sub-channel (303).

2. The cold-press formed micro flow channel composite bipolar plate mold according to claim 1, wherein,

the first sub-runners (303) are arranged in parallel and are uniformly arranged between the first main runner (301) and the second main runner (302).

3. The cold-press formed micro flow channel composite bipolar plate mold according to claim 2, wherein,

the first sub-channels (303) are divided by a flow plate (305); one end of the flow plate (305) close to the first main flow channel (301) is in an inverted T shape, and the other end of the flow plate extends along a direction perpendicular to the second main flow channel (302).

4. The cold-press molded micro flow channel composite bipolar plate mold according to claim 3, wherein,

the middle part of the first die holder (100) is provided with a plug hole (101); the first die (300) is provided with a plug-in block (306) matched with the plug-in hole (101).

5. The cold-press formed micro flow channel composite bipolar plate mold according to claim 4, wherein,

guide posts (102) are further arranged at four corners of the first die holder (100), and the guide posts (102) extend along the direction of the discharging frame (400);

the discharging frame (400) is provided with a guide hole (401) matched with the guide column (102).

6. The cold-press formed micro flow channel composite bipolar plate mold according to claim 5, wherein,

one side of the demolding module (500) is fixedly connected with the discharging frame (400), and the other side of the demolding module is fixedly connected with the second mold base (200).

7. The cold-press formed micro flow channel composite bipolar plate mold according to claim 6, wherein,

the demolding module (500) comprises: the demolding base plate (501), the limiting plate (503) and the elastic group (504) are sequentially wrapped in the demolding frame (502);

two ends of one side of the limiting plate (503) are fixedly connected to the second die holder (200) through brackets (505);

the elastic group (504) comprises a plurality of springs and is arranged on the inner side of the bracket (505), and through holes matched with the springs are formed in the limiting plate (503);

one end of the spring is fixedly connected with the second die holder (200), and the other end of the spring passes through the through hole to be in contact with the demoulding pad (501).

8. The cold-formed micro flow channel composite bipolar plate mold according to claim 7, wherein the springs are distributed in an array.

9. The cold-press formed micro flow channel composite bipolar plate mold according to claim 8, wherein,

the middle part of blowing frame (400) forms and places logical groove (402), place logical groove (402) shape and size with the shape and the size looks adaptation of first mould (300).

10. The cold-press formed micro flow channel composite bipolar plate mold according to claim 9, wherein,

the demoulding backing plate (501) is movably arranged between the demoulding frame (502) and the placing through groove (402); the shape and the size of the demoulding pad (501) are matched with those of the placing through groove (402).