Folding fuel cell module structure

Abstract

The utility model discloses a folding fuel cell module structure which comprises single cell structures, and flexible connection structures are arranged among the single cell structures. According to the utility model, the membrane electrode assemblies and the metal bipolar plate assemblies are bonded into the single cells, and meanwhile, a plurality of groups of single cells are connected together through the flexible connection structures at the edges to form a folding type fuel cell module structure, so that the stacking process of a galvanic pile can be greatly simplified, and the stacking of a plurality of single cells can be quickly completed while the stacking precision is ensured; the yield and the production efficiency are effectively improved; the flexible connection structure composed of the composite connection structure and the pores is punched between the continuous single batteries, and the composite connection structure comprises the first barrier film, the metal plate and the second barrier film, so that the stability of the joint is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a foldable fuel cell module structure. Background Art

[0002] A hydrogen fuel cell is a power generation device that uses hydrogen as fuel and oxygen as an oxidant. Its main components include membrane electrodes, bipolar plates, end plates and other structural parts. During the manufacturing process, the key process is to cross-stack the membrane electrodes and bipolar plates and press them together using a press.

[0003] However, the stacking process of battery stacks requires extremely high precision. Currently, robots are mainly used for stacking, and positioning is carried out in conjunction with limit fixtures, or manual stacking is used in combination with limit fixtures for positioning. Since it is necessary to ensure the grip during the grasping action, it is very easy to cause damage to the components, making the assembly process time-consuming, the yield rate is low, and the production cost is high. Even if the stacking process is simplified by bonding the membrane electrode and the bipolar plate to form a single cell structure, or integrating multiple groups of single cell structures into a modular structure, it does not change the stacking method, so it still cannot meet the requirements of future high-rate production. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems and provide a foldable fuel cell module structure.

[0005] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions, including:

[0006] A single cell structure, the single cell structure comprising a first single cell and a second single cell stacked in sequence;

[0007] A soft connection structure is provided between the first single cell and the second single cell, the soft connection structure comprising a composite connection structure and a punched hole, and the first single cell and the second single cell are connected via the soft connection structure;

[0008] The single cell structure is composed of two groups of membrane electrode assemblies and a metal bipolar plate assembly, and the two groups of membrane electrode assemblies are respectively attached to both sides of the metal bipolar plate assembly.

[0009] As a further description of the above technical solution, the membrane electrode assembly includes a first membrane electrode assembly and a second membrane electrode assembly, the first membrane electrode assembly is attached to one end surface of the metal bipolar plate assembly, and the second membrane electrode assembly is attached to the other end surface of the metal bipolar plate assembly.

[0010] As a further description of the above technical solution, the first membrane electrode assembly includes a first normal membrane electrode and a first inactive area frame, and the first normal membrane electrode and the first inactive area frame are sequentially spaced and combined to form the first membrane electrode assembly.

[0011] As a further description of the above technical solution, the second membrane electrode assembly includes a second normal membrane electrode and a second inactive area frame, and the second normal membrane electrode and the second inactive area frame are sequentially spaced and combined to form the second membrane electrode assembly.

[0012] As a further description of the above technical solution, flow channels are stamped on both side end surfaces of the metal bipolar plate assembly, and the flow channels include anode flow channels and cathode flow channels.

[0013] As a further description of the above technical solution, the anode flow channel and the cathode flow channel are arranged in sequence and spaced apart on the metal bipolar plate assembly, the anode flow channel is a corrugated flow channel, and the cathode flow channel is a straight flow channel.

[0014] As a further description of the above technical solution, the soft connection structure is arranged at the edge connection between the first single battery and the second single battery.

[0015] As a further description of the above technical solution, the punching holes are equidistantly arranged between the composite connection structures.

[0016] As a further description of the above technical solution, the composite connection structure includes a barrier film and a metal plate, and the barrier film is made of polyethylene naphthalate film.

[0017] As a further description of the above technical solution, the barrier film includes a first barrier film and a second barrier film, and the first barrier film and the second barrier film are respectively arranged on both sides of the metal plate.

[0018] The beneficial effects of the utility model are as follows:

[0019] 1. The utility model bonds the membrane electrode assembly and the metal bipolar plate assembly into a single cell, and connects multiple groups of single cells together through the soft connection structure at the edge, forming a foldable fuel cell module structure, which can greatly simplify the stacking process of the battery stack, and can quickly complete the stacking of multiple single cells while ensuring the stacking accuracy, effectively improving the yield rate and production efficiency;

[0020] 2. In the present invention, a soft connection structure consisting of a composite connection structure and pores is punched out between continuous single-cell structures. The composite connection structure includes a first barrier film, a metal plate and a second barrier film, which effectively improves the stability of the connection.

[0021] In order to more clearly illustrate the structural features and functions of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the exploded structure of the foldable fuel cell module structure of the utility model;

[0023] Figure 2 It is a schematic structural diagram of the first membrane electrode assembly of the utility model;

[0024] Figure 3 It is a structural schematic diagram of the metal bipolar plate assembly of the utility model;

[0025] Figure 4 It is a structural schematic diagram of the second membrane electrode assembly of the utility model;

[0026] Figure 5 It is a structural schematic diagram of the foldable fuel cell module structure of the utility model;

[0027] Figure 6 It is a structural schematic diagram of the single battery connection structure of the utility model;

[0028] Figure 7 yes Figure 6 Schematic diagram of the enlarged structure at AA in the middle;

[0029] Figure 8 It is a structural schematic diagram of the composite connection structure of the utility model.

[0030] Reference numerals:

[0031] 1. First membrane electrode assembly; 2. Metal bipolar plate assembly; 3. Second membrane electrode assembly; 4. First single cell; 5. Second single cell; 6. Composite connection structure; 61. First barrier membrane; 62. Metal plate; 63. Second barrier membrane; 7. Punched pores; 101. First normal membrane electrode; 102. First inactive area frame; 201. Anode flow channel; 202. Cathode flow channel; 301. Second normal membrane electrode; 302. Second inactive area frame. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solution in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model.

[0033] like Figure 1-Figure 8As shown, in one embodiment, a foldable fuel cell module structure includes: a single cell assembly, the single cell assembly includes a first single cell 4 and a second single cell 5, a soft connection structure is provided between the first single cell 4 and the second single cell 5, the first single cell 4 and the second single cell 5 are connected by the soft connection structure, so that the first single cell 4 and the second single cell 5 can be stacked in sequence to form a fuel cell module structure. Specifically, the number of stacking units can be 50, 100, 150, etc., which can be determined according to actual design requirements.

[0034] The single cell structure consists of two sets of membrane electrode assemblies and a metal bipolar plate assembly 2. The two sets of membrane electrode assemblies are divided into front and back sides and respectively attached to the two sides of the metal bipolar plate. Through the punching process, a soft connection structure between the single cells is manufactured to form a fuel cell module structure with folding function.

[0035] like Figure 1-Figure 8 As shown, in this embodiment, the membrane electrode assembly includes a first membrane electrode assembly 1 and a second membrane electrode assembly 3, the first membrane electrode assembly 1 is attached to one side end surface of the metal bipolar plate assembly 2, and the second membrane electrode assembly 3 is attached to the other side end surface of the metal bipolar plate assembly 2.

[0036] like Figure 1-Figure 8 As shown, in this embodiment, the membrane electrode assembly is an integrated multi-piece modular structure. Specifically, the first membrane electrode assembly 1 includes a first normal membrane electrode 101 and a first inactive area frame 102, and the first normal membrane electrode 101 and the first inactive area frame 102 are sequentially spaced and combined to form the first membrane electrode assembly 1; the second membrane electrode assembly 3 includes a second normal membrane electrode 301 and a second inactive area frame 302, and the second normal membrane electrode 301 and the second inactive area frame 302 are sequentially spaced and combined to form the second membrane electrode assembly 3.

[0037] Specifically, the first normal membrane electrode 101 and the second normal membrane electrode 301 CCM (Catalyst Coated Membrane proton exchange membrane) are coated with a cathode catalyst layer on the front side and bonded with a gas diffusion layer, and the back side is coated with an anode catalyst layer and bonded with a gas diffusion layer.

[0038] like Figure 1-Figure 8 As shown, in this embodiment, the metal bipolar plate assembly 2 is an integrated structure of multiple bipolar plate modules, and flow channels, pores, transition zones and other parts are cross-stamped on the end surfaces on both sides.

[0039] Specifically, the flow channel includes an anode flow channel 201 and a cathode flow channel 202, the anode flow channel 201 is a corrugated flow channel, and the cathode flow channel 202 is a straight flow channel. The front side of the metal bipolar plate assembly 2 is the anode flow channel 201, the cathode flow channel 202, and the cathode flow channel 202 are arranged in a cross-shaped distribution in sequence, while the back side is opposite to the front side, with the cathode flow channel 202, the anode flow channel 201, the cathode flow channel 202, and the anode flow channel 201 being arranged in a cross-shaped distribution in sequence.

[0040] like Figure 1-Figure 8 As shown, in this embodiment, the first membrane electrode assembly 1 and the second membrane electrode assembly 3 are offset and attached. Specifically, during assembly, the first normal membrane electrode 101 corresponds to the second inactive area frame 302, the first normal membrane electrode 101 is attached to the anode surface of the corresponding metal bipolar plate assembly 2 on one side, and the second inactive area frame 302 is attached to the cathode surface of the corresponding metal bipolar plate assembly 2 on the other side; similarly, the first inactive area frame 102 corresponds to the second normal membrane electrode 301, the first inactive area frame 102 is attached to the cathode surface of the corresponding metal bipolar plate assembly 2 on one side, and the second normal membrane electrode 301 is attached to the anode surface of the corresponding metal bipolar plate assembly 2 on the other side.

[0041] like Figure 1-Figure 8 As shown, in this embodiment, the soft connection structure includes a composite connection structure 6 and punched holes 7. The composite connection structure 6 is arranged at the edges of both sides of the single battery, and the punched holes 7 are equidistantly arranged between the composite connection structures 6.

[0042] Furthermore, the composite connection structure 6 includes a barrier film and a metal plate 62, the barrier film includes a first barrier film 61 and a second barrier film 63, the first barrier film 61 and the second barrier film 63 are respectively arranged on both sides of the metal plate 62, and the specific length, height and width dimensions of the structure can be set according to actual conditions.

[0043] Specifically, the barrier film is made of polyethylene naphthalate film (PEN), which has excellent high strength, high modulus and thermal resistance properties, as well as excellent gas barrier properties, water resistance, and radioactivity resistance, so that the membrane electrode assembly can be kept as taut as possible, effectively improving the packaging density.

[0044] Working principle: The membrane electrode assembly and the metal bipolar plate assembly 2 are bonded together to form a single cell structure; at the same time, multiple single cells are connected together through the soft connection structure at the edge to form a foldable fuel cell module structure; between the single cell assemblies, a composite connection structure 6 and a soft connection structure composed of pores are manufactured by punching. The composite connection structure 6 is composed of a first barrier film 61, a metal plate 62 and a second barrier film 63, forming a connection structure similar to a "sandwich", which effectively improves the stability of the connection.

[0045] Through the above technical solution, the present application greatly simplifies the stacking process of the battery stack. While ensuring the stacking accuracy, it can quickly complete the stacking of multiple single batteries, effectively improving the yield rate and production efficiency.

[0046] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A foldable fuel cell module structure, characterized in that: include: A single cell structure, the single cell structure comprising a first single cell (4) and a second single cell (5) stacked in sequence; A soft connection structure is provided between the first single cell (4) and the second single cell (5), the soft connection structure comprising a composite connection structure (6) and a punched hole (7), and the first single cell (4) and the second single cell (5) are connected via the soft connection structure; The single cell structure is composed of two groups of membrane electrode assemblies and a metal bipolar plate assembly (2), and the two groups of membrane electrode assemblies are respectively attached to both sides of the metal bipolar plate assembly (2).

2. The foldable fuel cell module structure according to claim 1, characterized in that: The membrane electrode assembly comprises a first membrane electrode assembly (1) and a second membrane electrode assembly (3), wherein the first membrane electrode assembly (1) is bonded to one end surface of the metal bipolar plate assembly (2), and the second membrane electrode assembly (3) is bonded to the other end surface of the metal bipolar plate assembly (2).

3. The foldable fuel cell module structure according to claim 2, characterized in that: The first membrane electrode assembly (1) comprises a first normal membrane electrode (101) and a first inactive region frame (102); the first normal membrane electrode (101) and the first inactive region frame (102) are sequentially spaced and combined to form the first membrane electrode assembly (1).

4. The foldable fuel cell module structure according to claim 2, characterized in that: The second membrane electrode assembly (3) comprises a second normal membrane electrode (301) and a second inactive region frame (302); the second normal membrane electrode (301) and the second inactive region frame (302) are sequentially spaced and combined to form the second membrane electrode assembly (3).

5. The foldable fuel cell module structure according to claim 1, characterized in that: Flow channels are stamped on both side end surfaces of the metal bipolar plate assembly (2), and the flow channels include an anode flow channel (201) and a cathode flow channel (202).

6. The foldable fuel cell module structure according to claim 5, characterized in that: The anode flow channel (201) and the cathode flow channel (202) are sequentially arranged at intervals on the metal bipolar plate assembly (2); the anode flow channel (201) is a corrugated flow channel, and the cathode flow channel (202) is a straight flow channel.

7. The foldable fuel cell module structure according to claim 1, characterized in that: The soft connection structure is arranged at the edge connection of the first single battery (4) and the second single battery (5).

8. The foldable fuel cell module structure according to claim 1, characterized in that: The punching holes (7) are arranged at equal distances between the composite connection structures (6).

9. The foldable fuel cell module structure according to claim 1, characterized in that: The composite connection structure (6) comprises a barrier film and a metal plate (62), wherein the barrier film is made of polyethylene naphthalate film.

10. The foldable fuel cell module structure according to claim 9, characterized in that: The barrier film comprises a first barrier film (61) and a second barrier film (63), and the first barrier film (61) and the second barrier film (63) are respectively arranged on both sides of the metal plate (62).

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