JPH06101339B2 - Liquid fuel cell - Google Patents

Description

FIELD OF THE INVENTION The present invention relates to a liquid-fueled hydrazine-air fuel cell,
The present invention relates to a liquid ring type fuel cell such as a methanol-air fuel cell, and more particularly to a long service life of the cell, improvement of cell performance, improvement of liquid sealing property, and miniaturization of cell body.

2. Description of the Related Art Conventionally, in order to prevent the deterioration of the negative electrode due to the outside air, this type of fuel cell has an anolite supply passage and an anolite discharge passage that communicate with each other at a position higher than the electrodes or the anolite chamber. Anolite was supplied to the anolite chamber from the anolite supply passage by an independent communication pipe for each, and the anolite chamber was filled with the anolite during non-power generation to prevent outside air from entering. Further, during non-power generation, the anolyte in the anolyte supply passage and the anolyte discharge passage flows out of the battery to eliminate the liquid short circuit between the adjacent cells.

Problems to be Solved by the Invention FIG. 3 shows a cell frame of the conventional fuel cell.

The fuel cell body is formed by stacking the cell frame 4 in which the anolite supply passage 1 and the anolite discharge passage 2 are provided at a position higher than the anolite chamber 3. The flow of the anolite in the battery frame 4 is sent from the anolite supply passage 1 to the lower part of the battery frame 4 through the communication pipe 5, then enters the anolite chamber 3, and then flows out of the battery through the upper anolite passage 2. Air flows through the upper and lower entrances 6 and 7 of the battery frame 4.

As described above, in the conventional fuel cell, since the liquid sealing surfaces of the anolite supply passage 1 and the anolite discharge passage 2 are divided into two parts, the pressure for the liquid seal becomes uneven and liquid leakage often occurs. It was Also, the anolite supply passage 1
Since the branch pipe 5 is located beside the battery frame 4, there is a drawback that the battery body becomes large.

The present invention aims to eliminate the above-mentioned drawbacks.

Means for Solving the Problems To achieve this object, the present invention provides an anolite supply passage and an anolite discharge passage on the same surface in a battery frame, and separates the battery frame into an anolite chamber frame and an air chamber frame. The two types of frames are each provided with an anolyte chamber separator and an air chamber separator, and a communication pipe for supplying anolite from the anolyte supply passage to the lower portion of the battery is provided between the separators.

As a result, the anolite supply passage and the communication pipe, which are conventionally located beside the battery frame, come to the center of the battery frame in the present invention, so the air supply direction may intersect the anolite supply direction. It is also possible to supply the anolyte and the anolyte in the same direction, and since the anolyte supply passage and the anolyte discharge passage are on the same surface, the pressure for liquid sealing is uniform, and the anolite supply passage and Since the communication pipe is located in the center of the battery frame, the battery body can be downsized.

Embodiment An embodiment of the present invention will be described with reference to FIGS. 1 and 2.

As shown in FIG. 1 and FIG. 2, the anolite supply passage 1 and the anolite discharge passage 2 are provided on the same surface of the anolite chamber frame 4a provided with the anolite chamber separator 8a and the air chamber separator 8b and the upper portion of the air chamber frame 4b. The anolite is provided from the anolite supply passage 1 through the communication pipe 5 to the lower part of the battery, then enters the anolite chamber 3, and then passes through the upper anolite discharge passage 2 to flow out of the battery. At the time of non-power generation, the anolite in the anolite supply passage 1 and the anolite discharge passage 2 flows out of the battery, and the adjacent cells are in a liquid independent form. Further, since the anolite remains in the anolite chamber 3 and the communication pipe 5, it is possible to prevent outside air from entering the anolite chamber 3. Air is supplied from the air port 6 so as to intersect with the anolite supply direction because the anolite supply passage 1 and the communication pipe 5 are located in the center of the battery frames 4a and 4b.

EFFECTS OF THE INVENTION As described above, according to the present invention, it is possible to prevent the outside air from entering the anolite chamber during non-power generation, and since each cell is liquid independent, it is possible to prevent liquid short circuit and prevent deterioration of the electrodes, and to supply anolite. Since the passage and the anolite discharge passage are on the same surface, the pressurization for liquid sealing is uniform and the liquid sealing performance is improved, and since the anolite supply passage and communication pipe are located in the center of the battery frame, Since the rib directions of the anolyte chamber separator and the air chamber separator intersect by being able to supply from the lateral direction, there is a significant industrial value with remarkable advantages such as good pressure on the electrode surface and improved battery performance. .

[Brief description of drawings]

FIG. 1 is a perspective view showing a battery frame in an embodiment of the present invention, FIG. 2 is a sectional view of the battery frame of FIG. 1, and FIG. 3 is a perspective view showing a battery frame of a conventional liquid fuel cell. . 1 is an anolite supply passage, 2 is an anolite discharge passage, 3
Is an anolite chamber, 4 is a battery frame, 4a is an anolite chamber frame, 4b
Is an air chamber frame, 5 is a communication pipe, 6 is an air port, 7 is an air port, 8
Is a separator, 8a is an anolyte chamber separator, and 8b is an air chamber separator.

Claims (1)

[Claims] 1. An anolyte chamber frame, an air chamber frame, and a power generation part in which a diaphragm is interposed between positive and negative electrodes. The anolyte chamber frame and the air chamber frame each have a separator disposed in the frame. An anolite chamber is formed in the latter, and an air chamber is formed in the latter, and the anolite chamber frame on the surface opposite to the surface on which the anolite chamber is provided is the surface opposite to the surface on which the air chamber is provided. The negative electrode of the power generation part is placed on the surface of the anolyte chamber side of the anolite chamber frame, and the positive electrode of the power generation part is placed on the surface of the air chamber frame on the air chamber side. , The anolite chamber frame at a position higher than the anolite chamber and electrodes,
An anolite supply passage and an anolite discharge passage are provided through the air chamber frame, and between the anolite chamber frame on the side opposite to the surface of the anolite chamber frame on which the anolite chamber is provided, and between the air chamber frames, A communication pipe that supplies anolite from the anolite supply passage is provided to a position lower than the anolite chamber, a hole that connects the communication pipe and the anolite chamber is provided at the bottom of the anolite chamber frame, and an anolite chamber is provided at the top of the anolite chamber frame. And an anolite discharge passage are provided in the air chamber frame, and a rib is formed in the air chamber frame to form an air port for supplying air to the positive electrode of the power generation portion facing the air chamber. At times, an anolite is supplied from the anolite supply passage to each power generation part through a communication pipe, and when no power is generated, the inside of each power generation part is filled with anolyte to prevent outside air from entering. Noraito supply passage, configured liquid fuel cell comprising such anolyte flows out to the outside of the battery in the anolyte discharge passage.