A fuel cell graphite cell structure

Abstract

The utility model relates to fuel cell field, concretely is a kind of fuel cell graphite single cell structure.It includes cathode plate, membrane electrode and anode plate;Two ends of opposite of cathode plate are all adhered with voltage inspection piece through conductive glue;Membrane electrode both sides are all adhered with adhesive film, and two adhesive films are adhered with cathode plate and anode plate respectively.The utility model has good durability, improves fuel cell stack production efficiency, and can realize the promotion of stack consistency and electric performance from single cell level.

Description

Technical Field

[0001] This utility model relates to the field of fuel cells, and in particular to a graphite single-cell structure for fuel cells. Background Technology

[0002] Fuel cell single cells have the following advantages: 1. Improving the performance of a single cell can enhance the overall performance of the fuel cell stack. 2. If a faulty cell is found in the stack, it is easier to replace compared to a bipolar plate stack, thus improving production efficiency. 3. Currently, single cells both domestically and internationally are made of metal; graphite single cells can improve the durability of the entire fuel cell stack, making their development necessary.

[0003] Current research on graphite single cells mostly focuses on half-cells, such as... Figure 1 As shown, a membrane electrode is attached to one side of a bipolar plate through a gel membrane to obtain a half cell. However, it is not a true single cell structure. It only improves the assembly efficiency and does not divide the entire fuel cell stack into multiple independent single cells. Therefore, it is impossible to improve the stack consistency and electrical performance at the single cell level. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a graphite single-cell structure for fuel cells, which has good durability, improves the production efficiency of fuel cell stacks, and can improve stack consistency and electrical performance at the single-cell level.

[0005] The technical solution of this utility model is a graphite single cell structure for a fuel cell, including a cathode plate, a membrane electrode assembly (MEA) and an anode plate; voltage monitoring plates are bonded to opposite ends of the cathode plate by conductive adhesive; adhesive films are bonded to both sides of the MEA, and the two adhesive films are bonded to the cathode plate and the anode plate respectively.

[0006] Preferably, the adhesive film between the cathode plate and the membrane electrode is a cathode hot melt adhesive film, and the adhesive film between the anode plate and the membrane electrode is an anode hot melt adhesive film.

[0007] Preferably, the cathode plate, cathode hot melt adhesive film, membrane electrode, anode hot melt adhesive film and anode plate are stacked and distributed in sequence and hot-pressed together.

[0008] Preferably, the cathode plate has two grooves for mounting voltage monitoring plates.

[0009] Preferably, the voltage monitoring plate is located between the cathode plate and the cathode hot melt adhesive film.

[0010] Preferably, both the cathode plate and the anode plate are made of graphite.

[0011] Compared with the prior art, the present invention has the following beneficial technical effects: the electrode plate material in the present invention is graphite, which has good durability, and the fuel cell stack is divided into multiple independent single cells, which changes the composition of the stack, improves the production efficiency of the fuel cell stack, and improves the consistency and electrical performance of the stack from the single cell level. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the half-cell structure in existing graphite single-cell research.

[0013] Figure 2 This is an exploded view of the structure of an embodiment of the present utility model;

[0014] Figure 3 This is a partial structural schematic diagram of an embodiment of the present utility model;

[0015] Figure 4 This is a schematic diagram of the voltage monitoring plate being attached to the cathode plate.

[0016] Reference numerals: 1. Cathode plate; 2. Cathode hot melt adhesive film; 3. Membrane electrode; 4. Anode hot melt adhesive film; 5. Anode plate; 6. Voltage monitoring plate. Detailed Implementation

[0017] like Figures 2-4 As shown, this embodiment proposes a graphite single-cell fuel cell structure, including a stacked cathode plate 1, a cathode hot melt adhesive film 2, a membrane electrode assembly 3, an anode hot melt adhesive film 4, and an anode plate 5, as well as two voltage monitoring plates 6 bonded to opposite ends of the cathode plate 1 by conductive adhesive. The cathode plate 1 is made of graphite and its main function is to transport and uniformly distribute air. The cathode hot melt adhesive film 2 is used to bond the cathode plate 1 and the membrane electrode assembly 3, and its thickness can compensate for manufacturing errors of the electrode plates, ensuring the thickness consistency of the graphite single cell. The membrane electrode assembly 3 has patch structures at its hydrogen and air inlets and outlets, allowing gas to enter the membrane electrode assembly 3 through the two side plates and react to generate electrical energy. The anode hot melt adhesive film 4 is used to bond the membrane electrode assembly 3 and the anode plate 5, and its thickness can compensate for manufacturing errors of the electrode plates, ensuring the thickness consistency of the graphite single cell. The anode plate 5 is made of graphite and its main function is to transport and uniformly distribute hydrogen. The voltage monitoring plates 6 serve as voltage monitoring devices.

[0018] The cathode plate 1 has two grooves for mounting two voltage monitoring plates 6 respectively. The voltage monitoring plates 6 are located between the cathode plate 1 and the cathode hot melt adhesive film 2, which is conducive to the neat bonding of the entire single cell structure.

[0019] In the fabrication of a single cell, the voltage monitoring plate 6 is first bonded to the groove of the cathode plate 1 using conductive adhesive. Then, the cathode plate 1 is bonded to the cathode hot melt adhesive film 2 using heat bonding, and the anode plate 5 is bonded to the anode hot melt adhesive film 4 using heat bonding. Finally, the cathode plate 1, membrane electrode 3, and anode plate 5, all with adhesive films bonded to them, are stacked sequentially and hot-pressed to complete the fabrication of the single cell.

[0020] In this embodiment, the electrode material is graphite, which has excellent durability, thus overcoming the poor durability of metal single cells. The fuel cell stack is divided into multiple independent single cells, changing the composition of the stack and improving the production efficiency of the fuel cell stack. This achieves improvements in stack consistency and electrical performance at the single cell level, solving the problem that graphite half-cells cannot achieve stack consistency and electrical performance improvements at the single cell level.

[0021] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A graphite single-cell structure for a fuel cell, characterized in that, include: The cathode plate (1) has voltage monitoring plates (6) bonded to its opposite ends by conductive adhesive. Anode plate (5); The membrane electrode (3) has adhesive films bonded to both sides, and the two adhesive films are bonded to the cathode plate (1) and the anode plate (5) respectively.

2. The graphite single-cell structure for a fuel cell according to claim 1, characterized in that, The adhesive film between the cathode plate (1) and the membrane electrode (3) is a cathode hot melt adhesive film (2), and the adhesive film between the anode plate (5) and the membrane electrode (3) is an anode hot melt adhesive film (4).

3. The graphite single-cell structure for a fuel cell according to claim 2, characterized in that, The cathode plate (1), cathode hot melt adhesive film (2), membrane electrode (3), anode hot melt adhesive film (4) and anode plate (5) are stacked and distributed in sequence and hot-pressed together.

4. The graphite single-cell structure for a fuel cell according to claim 2, characterized in that, The cathode plate (1) has two grooves for mounting the voltage inspection plate (6).

5. A graphite single-cell structure for a fuel cell according to claim 4, characterized in that, The voltage inspection plate (6) is located between the cathode plate (1) and the cathode hot melt adhesive film (2).

6. The graphite single-cell structure for a fuel cell according to claim 1, characterized in that, Both the cathode plate (1) and the anode plate (5) are made of graphite.

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