TWI506841B - A connected conductive plane for fuel cell pack - Google Patents

Description

Conductive connecting plate

The present invention relates to a conductive connecting plate for a fuel cell stack, and the conductive connecting plate is provided with a concave-convex flow path structure.

Taking a hydrogen-oxygen fuel cell as an example, the operating voltage of a single fuel cell unit is between about 0.6V and 0.9V. Therefore, in the application, a plurality of fuel element pool units are usually connected in series to achieve the operating voltage required for the electronic product. According to the way of stacking, the fuel cell stack can be mainly divided into vertical stacking and horizontal serial connection. The vertically stacked fuel cell stack must stack a plurality of fuel cell units, which is complicated in production structure, difficult to assemble and mass-produced, and the assembled fuel cell stack is heavy and cannot be further thinned, which is disadvantageous for portable electronic product applications. And other issues.

The horizontal series fuel cell system uses multiple fuel cell units on the same plane, and the positive and negative electrodes between the fuel cell units are connected by wires. The design of the fuel cells in each fuel cell unit must still be considered. In the related art of the fuel cell stack, a structure for allowing the reaction fuel to flow into each of the fuel cell units on average has not been found.

Therefore, it is necessary to provide a new conductive connecting plate for the fuel cell stack, and the conductive connecting plate is provided with a concave and convex flow channel junction. The reaction gas is allowed to flow evenly into each of the fuel cell units to solve the problems of the prior art.

One object of the present invention is to provide a conductive connecting plate for use in a fuel cell stack, and the conductive connecting plate is provided with a concave-convex flow path structure.

To achieve the above object, the conductive connecting plate of the present invention comprises a first conductive plate, a second conductive plate, and a connecting portion, wherein the first conductive plate has a first concave-convex flow path structure, and the second conductive plate selectively has The second concave-convex flow path structure or the mesh-shaped perforated structure, and the two ends of the connecting portion are respectively connected to the first conductive plate and the second conductive plate, so that the first conductive plate and the second conductive plate are substantially in different planes.

According to an embodiment of the invention, the first conductive plate and the second conductive plate are integrally formed and joined with the connecting portion, so that the outer shape of the conductive connecting plate is stepped.

According to an embodiment of the invention, the first conductive plate and the second conductive plate have an included angle θ, wherein the included angle θ ranges from 0 degrees to 180 degrees.

According to an embodiment of the invention, the first concave-convex flow path structure and the second concave-convex flow path structure both include a fluid passage and a convex structure, wherein the convex structure is located around the fluid passage.

1, 1a, 1b, 1c, 1d‧‧‧ conductive connecting plate

10‧‧‧First conductive plate

70‧‧‧Second appearance parts

11‧‧‧First concave and convex flow path structure

20, 20a‧‧‧Second conductive plate

21‧‧‧Second concave flow path structure

22‧‧‧Mesh perforated structure

30‧‧‧Connecting Department

Θ‧‧‧ angle

100, 100a‧‧‧ fuel cell stack

111, 211, 41‧‧‧ fluid passage

112, 212, 42‧‧ ‧ convex structure

30‧‧‧Independent first conductive plate

40, 40a‧‧‧Independent second conductive plate

50, 50a‧‧‧ fluid distribution parts

80, 80a, 80b, 80c‧‧‧ fuel cell unit

81, 81a, 81b, 81c‧‧‧ membrane electrode assembly

51‧‧‧First air hole

52‧‧‧Second air holes

53‧‧‧ accommodating slots

60‧‧‧First appearance

Figure 1a is a side view of a conductive connecting plate of the present invention.

Figure 1b is a schematic illustration of a first embodiment of an electrically conductive web of the present invention.

Figure 2 is a schematic illustration of a second embodiment of the electrically conductive web of the present invention.

Figure 3 is a schematic illustration of a third embodiment of the electrically conductive web of the present invention.

Figure 4 is a schematic view showing a fourth embodiment of the electrically conductive connecting plate of the present invention.

Figure 5 is a schematic view showing a fifth embodiment of the electrically conductive connecting plate of the present invention.

Figure 6 is a schematic illustration of a first embodiment of an electrically conductive web of the present invention for use in a fuel cell stack.

Figure 7 is a schematic illustration of another embodiment of an electrically conductive web of the present invention for use in a fuel cell stack.

The above and other objects, features and advantages of the present invention will become more <

Please refer to FIG. 1a, FIG. 1b and FIG. 2 for an embodiment of the conductive connecting plate of the present invention, wherein FIG. 1a is a side view of the conductive connecting plate of the present invention; FIG. 1b is the first conductive connecting plate of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 2 is a schematic view showing a second embodiment of the conductive connecting plate of the present invention.

According to an embodiment of the present invention, as shown in FIGS. 1a and 1b, the conductive connecting plate 1 of the present invention is made of a conductive material. The conductive connecting plate 1 of the present invention comprises a first conductive plate 10, a second conductive plate 20, and a connecting portion 30, wherein the first conductive plate 10 has a first concave-convex flow path structure 11, and the second conductive plate 20 is selectively Having a mesh perforated structure 22 (Fig. 1b) or a second concave and convex flow channel junction Structure 21 (Figure 2). The two ends of the connecting portion 30 are respectively connected to the first conductive plate 10 and the second conductive plate 20 such that the first conductive plate 10 and the second conductive plate 20 are substantially in different planes.

As shown in FIG. 1b, in the present embodiment, the first concave-convex flow path structure 11 of the first conductive plate 10 of the present invention includes a fluid passage 111 and a convex structure 112, wherein the convex structure 112 is located around the fluid passage 111. The second conductive plate 20 of the conductive connecting plate 1 of the present invention is a mesh-shaped perforated structure 22, and the first conductive plate 10 and the second conductive plate 20 are integrally formed and joined with the connecting portion 30, and the first conductive plate 10 is parallel. The two conductive plates 20 have a stepped shape of the conductive connecting plate 1 of the present invention.

According to another embodiment of the present invention, as shown in FIG. 2, the second conductive plate 20a of the conductive connecting plate 1 of the present invention is a second concave-convex flow path structure 21. As shown in FIG. 2, the second concave-convex flow path structure 21 includes a fluid passage 211 and a convex structure 212, wherein the convex structure 212 is located around the fluid passage 211.

Please refer to FIG. 3 to FIG. 5 for a schematic diagram of different implementations of the conductive connecting plate of the present invention.

It should be noted that, as shown in FIG. 3 to FIG. 5, the relative positions of the first conductive plate 10 and the second conductive plate 20 may be variously changed. For example, as shown in FIG. 3, the first of the conductive connecting plates 1b The conductive plate 10 and the second conductive plate 20 are both rectangular, and the connecting portion 30 is connected to the short-axis side edges of the first conductive plate 10 and the second conductive plate 20. Alternatively, as shown in FIG. 4, the connecting portion 30 of the conductive connecting plate 1c is connected to the long-axis side of the first conductive plate 10 and the second conductive plate 20, and the appearance of the conductive connecting plate 1c is the same as that of the first embodiment. It is stepped.

In addition, according to an embodiment of the present invention, the first conductive plate 10 and the second conductive plate 20 do not need to be arranged in parallel, as shown in FIG. It is shown that the first conductive plate 10 of the conductive connecting plate 1d has an angle θ with the second conductive plate 20. It should be noted that the shape and connection position of the first conductive plate 10 and the second conductive plate 20 may be variously changed. The present invention only exemplifies three different embodiments, but the present invention does not The first conductive plate 10 and the second conductive plate 20 of the conductive connecting plate 1d are substantially in different planes, and the angle θ between the first conductive plate 10 and the second conductive plate 20 ranges from 0 to 180 degrees. Just fine. The angle between the angles of Fig. 3 and Fig. 4 is from 0 to 180 degrees.

Please refer to FIG. 6 for an embodiment of the conductive connecting plate of the present invention for a fuel cell stack, wherein FIG. 6 is a schematic view of a first embodiment of the conductive connecting plate of the present invention for a fuel cell stack.

The conductive connecting plate 1 of the present invention is used for the fuel cell stack 100, wherein the fuel cell stack 100 comprises: two membrane electrode sets 81, 81a, one conductive connecting plate 1, an independent first conductive plate 30, and an independent second conductive The plate 40, the fluid dispensing member 50, the first appearance member 60, and the second appearance member 70. The independent first conductive plate 30 corresponds to the first conductive plate 10 of the conductive connecting plate 1, and the fuel cell unit 80 is formed between the independent first conductive plate 30, the membrane electrode group 81, and the first conductive plate 10. The independent second conductive plate 40 corresponds to the second conductive plate 20 of the conductive connecting plate 1, and the fuel cell unit 80a is formed between the independent second conductive plate 40, the membrane electrode group 81a, and the second conductive plate 20.

As shown in FIG. 6, in the present embodiment, the first concave-convex flow path structure 11 and the independent second conductive plate 40 of the first conductive plate 10 both include fluid passages 111, 41 and a convex structure 112, 42, of which the first The convex structure 112 of the conductive plate 10 and the membrane electrode group 81 In close contact, the convex structure 42 of the independent second conductive plate 40 is in close contact with the membrane electrode group 81a. Further, by the design of the fluid passages 111, 41, the reaction fuel is guided to flow in the fluid passages 111, 41 and uniformly chemically react with the membrane electrode groups 81, 8a.

At the same time, the reaction fuel (e.g., hydrogen) enters the fluid passages 111, 211 in the direction indicated by the arrow in Fig. 6, and electrochemically reacts with the membrane electrode groups 81, 81a to cause the fuel cell units 80, 80a to generate electric energy. The water produced by the reaction is discharged by the second conductive plate 20 and the mesh-shaped perforated structure 22 of the independent first conductive plate 30 to maintain the electrical stability of the membrane electrode groups 81, 81a. The fluid distribution member 50 is used for reacting the fuel, the first appearance member 60 and the second appearance member 70 are sufficient to form the appearance of the fuel cell stack 100, and the second appearance member 70 is provided with a plurality of vent holes for the outside air to enter the fuel cell stack. 100 participates in the chemical reaction of the fuel cell units 80, 80a.

Please refer to FIG. 7 for another embodiment of the conductive connecting plate of the present invention for a fuel cell stack, wherein FIG. 7 is a schematic view of another embodiment of the conductive connecting plate of the present invention for a fuel cell stack.

In the present embodiment, as shown in FIG. 7, the conductive connecting plate 1c of the present invention is used for the fuel cell stack 100a, wherein the fuel cell stack 100a includes: two membrane electrode groups 81b, 81c, one conductive connecting plate 1a, two Separate second conductive plates 40, 40a and two fluid distribution members 50, 50a. It should be noted that the fuel cell stack 100a may also include an appearance member (as shown in FIG. 6), and the present invention is not limited to the embodiment shown in FIG.

The independent second conductive plate 40a corresponds to the first conductive plate 10 of the conductive connecting plate 1a, and a fuel cell is formed between the independent second conductive plate 40a, the membrane electrode group 81b and the first conductive plate 10 Unit 80b. The independent second conductive plate 40 corresponds to the second conductive plate 20 of the conductive connecting plate 1, and the fuel cell unit 80c is formed between the independent second conductive plate 40, the membrane electrode group 81c, and the second conductive plate 20.

As shown in Figure 7, the two fluid distribution members 50, 50a are located on either side of the fuel cell units 80b, 80c, respectively. It should be noted that when the fuel cell stack 100a is in operation, the reaction fuel will only enter the fuel cell stack 100a by one of the fluid distribution member 50 or the fluid distribution member 50a, and no reaction fuel will occur simultaneously by the two fluid distribution members 50. The occurrence of 50a entering the fuel cell stack 100a occurs. For example, if the reaction fuel enters the fluid distribution member 50 in the direction shown in FIG. 6, the polarity of the independent second conductive plate 40a is the same as that of the second conductive plate 20 (eg, the anode), and the polarity of the independent second conductive plate 40 is the same as that of the second conductive plate 40. A conductive plate 10 is the same (eg, a cathode). The reaction after the reaction fuel enters the fuel cell stack 100a is the same as that of the previous embodiment, and therefore will not be described again. Please refer to the related description.

In summary, the present invention is a breakthrough in terms of its purpose, means and efficacy, and it is different from the characteristics of the prior art. It is a great breakthrough for the reviewer to ask for an early patent, and to benefit the society. Debian. It is to be noted that the above-described embodiments are merely illustrative of the principles of the invention and its advantages, and are not intended to limit the scope of the invention. Modifications and variations of the embodiments can be made by those skilled in the art without departing from the spirit and scope of the invention. The scope of protection of the present invention should be as described in the scope of the patent application to be described later.

1‧‧‧Electrical connection plate

10‧‧‧First conductive plate

11‧‧‧First concave and convex flow path structure

20‧‧‧Second conductive plate

22‧‧‧Mesh perforated structure

30‧‧‧Connecting Department

111‧‧‧ fluid passage

112‧‧‧ convex structure

Claims (7)

A conductive connecting plate is used for a fuel cell stack. The conductive connecting plate comprises: a first conductive plate having a first concave-convex flow path structure; and a second conductive plate selectively having a first conductive plate a second concave-convex flow channel structure or a mesh-shaped perforated structure; and a connecting portion, the two ends of the connecting portion are respectively connected to the first conductive plate and the second conductive plate, so that the first conductive plate and the second conductive plate The first conductive plate and the second conductive plate are integrally formed and coupled with the connecting portion, so that the conductive connecting plate has a stepped shape. The conductive connecting plate of claim 1, wherein the first conductive plate and the second conductive plate have an angle θ. The conductive connecting plate according to claim 2, wherein the angle θ ranges from 0 degrees to 180 degrees. A conductive connecting plate is used for a fuel cell stack. The conductive connecting plate comprises: a first conductive plate having a first concave-convex flow path structure; and a second conductive plate selectively having a first conductive plate a second concave-convex flow channel structure; and a connecting portion, the two ends of the connecting portion are respectively connected to the first conductive plate and the second conductive plate, such that the first conductive plate and the second conductive plate are substantially in different planes. The conductive connecting plate of claim 4, wherein the first concave-convex flow path structure and the second concave-convex flow path structure both comprise a fluid passage and a convex structure, wherein the convex structure is located around the fluid passage . The conductive connecting plate according to claim 2, wherein the second conductive plate is the mesh-shaped perforated structure. The conductive connecting plate of claim 6, wherein the first concave-convex flow path structure comprises a fluid passage and a convex structure, wherein the convex structure is located around the fluid passage.