Hot-pressing die for bipolar plate of HT-PEM fuel cell

Abstract

The utility model belongs to the technical field of fuel cell bipolar plate molds, and particularly relates to an HT-PEM fuel cell bipolar plate hot-pressing mold. The HT-PEM fuel cell bipolar plate hot-pressing mold comprises an upper mold plate, the bottom surface of the upper mold plate is provided with a pressing convex part, a plurality of upper heating holes are uniformly formed in the upper mold plate above the pressing convex part, and a plurality of upper heat dissipation liquid holes are uniformly formed in the upper mold plate above the upper heating holes; a material groove matched with the pressing convex part is formed in the top surface of the lower mold plate, a plurality of lower heating holes are uniformly formed in the lower mold plate below the material groove, and a plurality of lower heat dissipation liquid holes are uniformly formed in the lower mold plate below the lower heating holes. According to the HT-PEM fuel cell bipolar plate hot-pressing die, the upper part and the lower part of a raw material in the trough are in a uniform temperature field, the temperature is rapidly raised to the required temperature, and when a larger bipolar plate is produced, the internal crystallization of the bipolar plate is uniform, the internal stress is small, and the bipolar plate is flat and does not warp during cooling, so that the die is suitable for processing the bipolar plate with a high processing temperature requirement.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of fuel cell bipolar plate mould, specifically relates to a kind of HT-PEM fuel cell bipolar plate hot-pressing mould. BACKGROUND

[0002] High Temperature Proton Exchange Membrane Fuel Cell (HT-PEMFC) is a kind of fuel cell which uses hydrogen as fuel, and hydrogen generates proton and electron under the action of anode catalyst, proton reaches cathode through exchange membrane and reacts with oxygen in cathode, and electron is transferred from anode to cathode through external circuit to form electric current.

[0003] HT-PEM fuel cell needs to use bipolar plate, commonly used metal bipolar plate, epoxy resin composite bipolar plate, modified epoxy resin composite bipolar plate and polyphenylene sulfide composite bipolar plate, wherein metal bipolar plate and epoxy resin composite bipolar plate have poor corrosion resistance, which affects the service life of HT-PEM fuel cell. Polyphenylene sulfide composite bipolar plate has the advantages of high and low temperature resistance and good corrosion resistance, but it needs high processing temperature, and the existing processing mould is difficult to form a uniform temperature field when heating when coping with bipolar plate with high processing temperature requirement, and the area of bipolar plate that can be processed by the way of air cooling and small area mould is small, because if larger bipolar plate is processed, the cooling speed of the mould after increasing size will be slower, which affects the production speed. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of HT-PEM fuel cell bipolar plate hot-pressing mould to solve the technical problem that the existing bipolar plate mould is not suitable for processing bipolar plate with high processing temperature requirement.

[0005] In order to solve the above technical problems, the utility model provides a kind of HT-PEM fuel cell bipolar plate hot-pressing mould, comprising: upper die plate, the bottom surface of which is provided with pressing convex part, a plurality of upper heating holes are uniformly arranged in the upper die plate above the pressing convex part, and a plurality of upper heat dissipation liquid holes are uniformly arranged in the upper die plate above the upper heating holes;Lower die plate, the top surface of which is provided with material groove matched with the pressing convex part, a plurality of lower heating holes are uniformly arranged in the lower die plate below the material groove, and a plurality of lower heat dissipation liquid holes are uniformly arranged in the lower die plate below the lower heating holes.

[0006] Further, each two of the upper heating holes forms a group, and an upper temperature measuring hole is arranged between each group of upper heating holes;Each two of the lower heating holes forms a group, and a lower temperature measuring hole is arranged between each group of lower heating holes.

[0007] Further, the trough bottom is provided with a trough top rod through hole; and the trough is provided with a bottom plate.

[0008] Further, the lower die plate is provided with a plurality of positioning columns on the top surface; and the upper die plate is provided with positioning holes matched with the positioning columns on the bottom surface.

[0009] Further, the upper heating holes are each provided with an upper electric heating rod, and the power of the upper electric heating rod gradually decreases from the two sides to the middle of the upper die plate; and the lower heating holes are each provided with a lower electric heating rod, and the power of the lower electric heating rod gradually decreases from the two sides to the middle of the lower die plate.

[0010] Further, the upper heating holes and the lower heating holes are each ten; and the upper heat dissipation liquid holes and the lower heat dissipation liquid holes are each six.

[0011] The beneficial effects of the present application are as follows: the present application aims to solve the technical problem that the existing bipolar plate mold is not suitable for processing bipolar plates with high processing temperature requirements; the upper die plate of the HT-PEM fuel cell bipolar plate hot-pressing mold is uniformly provided with upper heating holes above the pressing convex part, the lower die plate is uniformly provided with lower heating holes below the trough, and after the pressing convex part is pressed into the trough to close the mold, the temperature field of the raw material in the trough is uniform, the raw material is rapidly heated to the required temperature, and the upper heating holes are uniformly provided with upper heat dissipation liquid holes above, and the lower heating holes are uniformly provided with lower heat dissipation liquid holes below, so that the heat can be quickly and uniformly removed after the pressure is released, and when a larger bipolar plate is produced, the internal crystallization of the bipolar plate is uniform during cooling, the internal stress is small, and the bipolar plate is flat and does not warp, so the mold is suitable for processing bipolar plates with high processing temperature requirements. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings required to be used in the specific embodiments or the prior description will be briefly introduced as follows: obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0013] Figure 1 is an explosion of the HT-PEM fuel cell bipolar plate hot-pressing mold of the present application Figure 1 ;

[0014] Figure 2 is an explosion of the HT-PEM fuel cell bipolar plate hot-pressing mold of the present application Figure 2 ;

[0015] In the drawings:

[0016] Upper template 100, pressing protrusion 110, upper heating hole 120, upper heat dissipation liquid hole 130, upper temperature measuring hole 140, positioning hole 150, lower template 200, material trough 210, lower heating hole 220, lower heat dissipation liquid hole 230, lower temperature measuring hole 240, material trough top rod through hole 250, bottom plate 260, positioning column 270, upper electric heating rod 310, lower electric heating rod 320, top rod 410. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments implemented by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] Example

[0019] like Figure 1 As shown, this utility model provides a hot pressing mold for HT-PEM fuel cell bipolar plates, including: an upper template 100, the bottom surface of which is provided with a pressing protrusion 110, and a plurality of upper heating holes 120 are uniformly opened in the upper template 100 above the pressing protrusion 110, and a plurality of upper heat dissipation holes 130 are uniformly opened in the upper template 100 above the upper heating holes 120; a lower template 200, the top surface of which is provided with a material groove 210 adapted to the pressing protrusion 110, and a plurality of lower heating holes 220 are uniformly opened in the lower template 200 below the material groove 210, and a plurality of lower heat dissipation holes 230 are uniformly opened in the lower template 200 below the lower heating holes 220.

[0020] The upper mold plate 100 of this HT-PEM fuel cell bipolar plate hot pressing mold has upper heating holes 120 evenly opened above the pressing protrusion 110, and the lower mold plate 200 has lower heating holes 220 evenly opened below the material groove 210. After the pressing protrusion 110 is pressed into the material groove 210 and the mold is closed, the raw material in the material groove 210 can have a uniform temperature field both above and below, and can be rapidly heated to the required temperature. In addition, the upper heating holes 120 have upper cooling liquid holes 130 evenly arranged above them, and the lower heating holes 220 have lower cooling liquid holes 230 evenly arranged below them. This can quickly and evenly remove heat after the pressurization is completed. When producing larger bipolar plates, it can also make the internal crystallization of the bipolar plate uniform, with low internal stress, flatness and no warping during cooling. Therefore, this mold is suitable for processing bipolar plates with high processing temperature requirements.

[0021] like Figure 1As shown, the upper heating holes 120 are in groups of two, and an upper temperature measuring hole 140 is arranged between each group of upper heating holes 120; the lower heating holes 220 are also in groups of two, and a lower temperature measuring hole 240 is arranged between each group of lower heating holes 220. The upper temperature measuring hole 140 and the lower temperature measuring hole 240 can be used to arrange temperature measuring sensors to monitor the temperature.

[0022] As shown in Figure 1 and Figure 2 As shown, the trough bottom of the trough 210 can be provided with a trough top rod through hole 250; the trough 210 is provided with a bottom plate 260. The size of the bottom plate 260 is matched with the trough 210, and by arranging the bottom plate 260 in the trough 210, different thicknesses of bipolar plates can be produced by adjusting the thickness of the bottom plate 260. By arranging the trough top rod through hole 250, the cooled bipolar plate can be taken out by the way of the ejector rod 410 passing through the trough top rod through hole 250 to lift the bottom plate 260.

[0023] As shown in Figure 1 and Figure 2 As shown, the top surface of the lower die plate 200 is provided with a plurality of positioning columns 270; the bottom surface of the upper die plate 100 is provided with positioning holes 150 matched with the positioning columns 270. When the mold is closed, the positioning columns 270 are inserted into the positioning holes 150 to ensure accurate mold closing.

[0024] In at least one embodiment, the uniform temperature field is formed as follows. The upper heating holes 120 are each provided with an upper electric heating rod 310, and the power of the upper electric heating rod 310 gradually decreases from both sides of the upper die plate 100 to the center; the lower heating holes 220 are each provided with a lower electric heating rod 320, and the power of the lower electric heating rod 320 gradually decreases from both sides of the lower die plate 200 to the center. The outermost side of the upper die plate 100 and the lower die plate 200 has a large heat dissipation area, and the center has a small heat dissipation area. By gradually reducing the power from both sides to the center, the difference between the highest temperature and the lowest temperature in the upper and lower temperature fields of the raw material in the trough 210 can be within 10℃.

[0025] In at least one embodiment, the upper heating holes 120 and the lower heating holes 220 are each ten; the upper heat dissipation liquid holes 130 and the lower heat dissipation liquid holes 230 are each six.

[0026] In summary, the upper die plate 100 of the hot-pressing die for the bipolar plate of the HT-PEM fuel cell is uniformly provided with the upper heating holes 120 above the pressing convex parts 110, the lower die plate 200 is uniformly provided with the lower heating holes 220 below the material grooves 210, the pressing convex parts 110 are pressed into the material grooves 210 after the die is closed, so that the raw materials in the material grooves 210 are uniformly heated from top to bottom, and the temperature is rapidly raised to the required temperature, the upper die plate 100 is uniformly provided with the upper heat dissipation liquid holes 130 above the upper heating holes 120, the lower die plate 200 is uniformly provided with the lower heat dissipation liquid holes 230 below the lower heating holes 220, and the heat can be quickly and uniformly removed after the pressure is finished, when a larger bipolar plate is produced, the internal crystallization of the bipolar plate is uniform during cooling, the internal stress is small, and the bipolar plate is flat and does not warp, so the die is suitable for processing bipolar plates with high processing temperature requirements.

[0027] In the embodiments provided in the present application, it should be understood that the disclosed system and device can be implemented in other manners. The above described embodiments are only illustrative, for example, the division of the mechanism is only a logical function division, and there can be another division manner in actual implementation, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0028] In the description of the present application, it should be explained that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0029] Based on the above ideal embodiments according to the present application, through the above description, related technical personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the contents in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A hot press mold for an HT-PEM fuel cell bipolar plate, characterized by, The utility model relates to a HT-PEM fuel cell bipolar plate hot-pressing mould, including: Upper die plate (100) bottom is equipped with press convex part (110), the upper die plate (100) in press convex part (110) top is evenly provided with a plurality of upper heating hole (120), the upper die plate (100) in upper heating hole (120) top is evenly provided with a plurality of upper heat dissipation liquid hole (130); Lower die plate (200) top is provided with the material groove (210) of adaptation with press convex part (110), the lower die plate (200) in material groove (210) bottom is evenly provided with a plurality of lower heating hole (220), the lower die plate (200) in lower heating hole (220) bottom is evenly provided with a plurality of lower heat dissipation liquid hole (230).

2. The HT-PEM fuel cell bipolar plate hot-pressing mould of claim 1, wherein, each two of the upper heating holes (120) form a group, and an upper temperature measuring hole (140) is provided between each group of upper heating holes (120); each two of the lower heating holes (220) form a group, and a lower temperature measuring hole (240) is provided between each group of lower heating holes (220).

3. The HT-PEM fuel cell bipolar plate hot-pressing mould of claim 2, wherein, a material groove top rod through hole (250) is provided in the bottom of the material groove (210); a bottom plate (260) is provided in the material groove (210).

4. The HT-PEM fuel cell bipolar plate hot-pressing mould of claim 3, wherein, a plurality of positioning columns (270) are provided on the top surface of the lower die plate (200); a plurality of positioning holes (150) are provided in the bottom surface of the upper die plate (100) and are adapted to the positioning columns (270).

5. The HT-PEM fuel cell bipolar plate hot-pressing mould of claim 4, wherein, an upper electric heating rod (310) is provided in each of the upper heating holes (120), and the power of the upper electric heating rod (310) gradually decreases from both sides of the upper die plate (100) to the middle; a lower electric heating rod (320) is provided in each of the lower heating holes (220), and the power of the lower electric heating rod (320) gradually decreases from both sides of the lower die plate (200) to the middle.

6. The HT-PEM fuel cell bipolar plate hot-pressing mould of claim 5, wherein, there are ten upper heating holes (120) and ten lower heating holes (220); there are six upper heat dissipation liquid holes (130) and six lower heat dissipation liquid holes (230).

Images