CN217588992U

CN217588992U - Hot-pressing device for fuel cell MEA

Info

Publication number: CN217588992U
Application number: CN202220998535.2U
Authority: CN
Inventors: 方蕾; 茹皓; 高璐璐; 沈新龙; 赵海敏; 曹寅亮; 杨光华; 张树国; 徐淳川
Original assignee: Jiangsu Haohydrogen Century New Energy Co ltd
Current assignee: Jiangsu Haohydrogen Century New Energy Co ltd
Priority date: 2022-04-26
Filing date: 2022-04-26
Publication date: 2022-10-14
Anticipated expiration: 2032-04-26

Abstract

The utility model discloses a hot-pressing device for fuel cell MEA, comprising a bottom plate and a top plate, wherein the bottom plate and the top plate are connected through a guide pillar, a pressing plate is arranged on the guide pillar in a sliding manner, a driving mechanism for driving the pressing plate to move towards the bottom plate along the guide pillar is arranged on the top plate, and a first hot-pressing plate and a second hot-pressing plate which are arranged just opposite to each other are respectively arranged on the opposite surfaces of the bottom plate and the pressing plate; the driving mechanism drives the pressing plate to press the first hot pressing plate and the second hot pressing plate against the fuel cell MEA and heat the pressed fuel cell MEA. The utility model discloses a molecular resonance method is to the heating of hot pressing plate body, and use pressure device to carry out the hot pressing to hydrogen fuel cell MEA after reaching required temperature, this method is compared and has the advantage that the heating is even, the energy consumption is low in traditional electrical heating and heating oil heating method, compares in the hot pressing temperature of the control MEA that microwave heating method can be better, can not have the microwave and reveal the danger healthy.

Description

Hot-pressing device for fuel cell MEA

Technical Field

The utility model relates to a fuel cell technical field, concretely relates to a hot press unit for fuel cell MEA.

Background

The fuel cell is a clean, high-efficiency and pollution-free electrochemical power generation device, and has attracted general attention at home and abroad in recent years. Among various fuel cells, proton exchange membrane fuel cells have the advantages of fast start at normal temperature, low working temperature, large current density, light weight, small volume, long service life, simple design of a cell stack sealing part due to the use of solid electrolyte and the like, are applied to power sources of electric vehicles and mobile power sources, and have wide market prospects.

There are two existing fuel cell hot-pressing methods: the first hot pressing method is to heat a pressing plate and then use a pressure device for hot pressing, the heating method comprises heat conduction oil heating, steam heating and electric heating, the heat conduction oil heating method has the advantages of high heat capacity and uniform temperature, low energy consumption, low heating speed and difficult control of temperature, the electric heating method is rapid in heating and simple in operation, the defects of large power consumption, unchanged replacement of a resistance wire in a fault mode, rapid temperature rise of the steam heating method, but a pressure boiler needs to be purchased, steam with high pipeline pressure is easy to condense into water to cause uneven plate surface temperature, if MEA is heated unevenly, partial resin is likely not melted, and the contact area between platinum carbon molecules and a catalyst layer on a microstructure is not increased sufficiently.

The second one is a hot pressing method of pressure device pressurization and microwave heating, for example, patent specification with publication number CN100377399C discloses a hydrogen-air fuel cell MEA microwave hot pressing device, which comprises a fixing frame, a square frame is arranged in the fixing frame, the square frame and a bottom plate of the fixing frame form a barrel-shaped structure, a plurality of groups of overlapped membrane electrodes are arranged in the square frame, a microwave antenna plate is arranged on the membrane electrode at the uppermost layer, the microwave antenna plate is connected with the output end of a microwave generator, an insulating cushion block is arranged on the microwave antenna plate, and a pressure device is arranged on the insulating cushion block. According to the scheme, media such as carbon fiber, platinum and Nafion resin in the MEA can absorb microwaves to generate heat, the heating is uniform, the power consumption is low, the temperature in the heating process of the MEA is not monitored and measured conveniently, the temperature of the MEA during hot pressing cannot be controlled well, and microwave heating can cause microwave leakage and damage to human health.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hot press unit for fuel cell MEA compares in traditional hot pressing mode, has the advantage that the heating is even, the energy consumption is low.

A hot-pressing device for fuel cell MEA comprises a bottom plate and a top plate, wherein the bottom plate and the top plate are connected through a guide pillar, a pressing plate is arranged on the guide pillar in a sliding mode, a driving mechanism used for driving the pressing plate to move towards the bottom plate along the guide pillar is arranged on the top plate, and a first hot-pressing plate and a second hot-pressing plate which are arranged oppositely are arranged on the opposite surfaces of the bottom plate and the pressing plate respectively; the driving mechanism drives the press plate to press the first and second hot press plates against the fuel cell MEA, and the fuel cell MEA is heated.

In this scheme, first hot pressboard and second hot pressboard surface are level and smooth, can guarantee its thermally equivalent when contacting with fuel cell MEA, adopt the clamp plate to compress tightly simultaneously, have reduced thermal scattering and disappearing.

Preferably, the first hot pressing plate and the second hot pressing plate both comprise a hot pressing plate body and a molecular resonance heat flow generator embedded in the hot pressing plate body and used for heating the hot pressing plate body.

Further preferably, the hot pressing plate body comprises two parts spliced with each other, and a groove for placing the molecular resonance heat flow generator is formed at the spliced interface of the two parts.

Preferably, the hot-pressing plate body is made of high-temperature resistant materials.

Preferably, the guide posts include four guide posts located at four corners of the bottom plate and the top plate.

Preferably, the drive mechanism is a hydraulic cylinder.

The utility model has the advantages that:

the hot-pressing plate body is heated by adopting a molecular resonance method, and the hydrogen fuel cell MEA is hot-pressed by using the pressure device after the required temperature is reached.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of a first hot press plate (a second hot press plate);

fig. 3 is a schematic structural diagram of a hot-press plate body.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, a hot press apparatus for a fuel cell MEA includes a base plate 1, a top plate 2, a pressing plate 3, a first hot-pressing plate 4, and a second hot-pressing plate 5; the bottom plate 1 and the top plate 2 are fixedly connected through guide posts 6 positioned at four corners, and the pressing plate 3 is positioned between the bottom plate 1 and the top plate 2 and is arranged on the guide posts 6 in a sliding manner; a driving mechanism 7 is fixed on the top plate 2 and used for driving the pressing plate 3 to move towards the bottom plate 1 along the guide post 6, and the driving mechanism 7 specifically adopts a hydraulic cylinder.

The first hot pressing plate 4 is fixed on the bottom plate 1, the second hot pressing plate 5 is fixed on the bottom surface of the top plate 2, and the first hot pressing plate 4 and the second hot pressing plate 5 are arranged oppositely; as shown in fig. 2 and 3, in this embodiment, each of the first hot pressing plate 4 and the second hot pressing plate 5 includes a hot pressing plate body 41 and a molecular resonance heat generator 42 embedded in the hot pressing plate body 41, specifically, a groove 411 is formed on the hot pressing plate body 41, one surface of the groove 411 opposite to the bottom plate 1 or the top plate 2 is open, and the molecular resonance heat generator 42 is disposed in the groove 411; alternatively, the hot-pressing plate 41 is provided in two separable parts, and the two parts form a groove 411 for placing the molecular resonance heat-flow generator 42 at the interface of the two parts. The specific structure of the molecular resonance heat flow generator 42 for heating the surface of the hot pressing plate 41 is the prior art, and reference may be made to the molecular resonance heat flow generator disclosed in patent No. CN101639233B, which is not described herein again. In this embodiment, the hot-pressing plate 41 is made of a high-temperature-resistant material.

The utility model discloses a hot pressing method:

heating the surface of the hot-pressing plate body 41 by a molecular resonance heat generator 42; placing a plurality of MEA horizontally or in a superposition way among the buffer materials; placing the buffer material and the MEA on a first hot press plate 4 of a press device; the platen 3 is driven by a hydraulic cylinder to apply pressure to the plurality of MEAs and heat them.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. A hot-pressing device for a fuel cell MEA is characterized by comprising a bottom plate and a top plate, wherein the bottom plate and the top plate are connected through a guide pillar, a pressing plate is arranged on the guide pillar in a sliding mode, a driving mechanism used for driving the pressing plate to move towards the bottom plate along the guide pillar is arranged on the top plate, and a first hot-pressing plate and a second hot-pressing plate which are arranged oppositely are arranged on the opposite surfaces of the bottom plate and the pressing plate respectively; the driving mechanism drives the press plate to press the first hot press plate and the second hot press plate against the fuel cell MEA and heat the fuel cell MEA.

2. The hot-pressing apparatus for a fuel cell MEA according to claim 1, wherein the first and second hot-pressing plates each comprise a hot-pressing plate body and a molecular resonance thermal flow generator embedded in the hot-pressing plate body for heating the hot-pressing plate body.

3. The hot-pressing apparatus for a fuel cell MEA according to claim 2, wherein the hot-pressing plate body comprises two parts that are assembled with each other, and the two parts form a groove at the assembled interface for placement of the molecular resonance heat flow generator.

4. The hot-pressing apparatus for a fuel cell MEA according to claim 2, wherein the hot-pressing plate body is made of a high temperature resistant material.

5. The hot-pressing apparatus for a fuel cell MEA according to claim 1, wherein the guide posts include four at four corners of the bottom plate and the top plate.

6. The hot-pressing apparatus for a fuel cell MEA according to claim 1, wherein the driving mechanism is a hydraulic cylinder.