JPS5958763A - Layer-built fuel cell - Google Patents

Abstract

PURPOSE:To increase the amount of electrolyte stored so as to extend the liquid supply frequency by providing an elastic conductor impregnated with electrolyte in a space surrounded by frame-like sealing members attached to the peripheries of the end surfaces of stacked unit blocks thereby forming a liquid storage chamber, and connecting it to liquid storage grooves corresponding to unit cells through a liquid supply path. CONSTITUTION:Elastic conductive members 9 attached to flat surfaces surrounded by frame-like fluorine-system rubber sealing members 8 spliced onto the top and the bottom of a unit block 1, are impregnated with phosphoric-acid electrolyte. The frame- like sealing member 8 is attached to the flat surface of a half plate 5' located at the bottom of an upper block 1 so as to form a liquid storage chamber 10, surrounded by the frame-like sealing members 8, between the facing half plates 5' and 5' of adjacent blocks 1. The liquid storage chamber 10 formed between the blocks 1, is connected to liquid storage grooves corresponding to unit cells through a liquid supply path which penetrates gas-separating plates 5' and 5. Owing to such constitution as above, arrangement of the stacked members is facilitated, and a deteriorated cell can be replaced for each block. Besides, the liquid supply frequency is extended 4-5 times as compared to one having only liquid storage grooves.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a fuel tank or pond in which unit blocks assembled in units of 10 to 20 cells are piled up in arbitrary quantities to dry up a battery stack.

BACKGROUND ART A conventional battery stack consists of a large number of unit cells (100 to 200 cells) summed B, L, and 1 through a gas separation plate.
h) This is accomplished by tightening between the end plates made of Kinkyu, which abut on the end faces via the terminal plate and heat-resistant insulating plate.

However, when increasing the number to 11 in this way, 5° (]11
It is difficult to align the parts, unevenness occurs in the product 11 direction, and the adhesion with the sea/V part in the manifold F mounting time η1 direction is poor, damaging the sea/L/i9 and causing gas leakage. It was the cause. In addition, it is rarely practical to replace unit cells in a battery stack that are severely degraded or have poor characteristics.

In addition, the electrolytic solution dries due to the operation of the battery length N.
A method is adopted in which a liquid storage groove is formed around one periphery of the gas separation plate corresponding to each unit cell, and liquid is replenished into the matrix of the unit cell via a liquid storage 7♂4 connected to the outside. Since the capacity for storing electrolyte is limited, it is necessary to stop the operation of the frost pond and replenish the electrolyte, which causes a drop in the operating rate.

DISCLOSURE OF THE INVENTION The present invention involves inserting a frame-shaped sea/I/part system around the periphery of each unit block that divides a battery stack into an arbitrary number of units, and 71. An elastic conductor FA impregnated with vinegar solution is provided to form a liquid storage chamber, and the liquid storage chamber and a liquid storage groove corresponding to each unit cell are communicated via a liquid supply passage to form a battery. The purpose is to increase the length of the fluid replenishment period by increasing the hot storage electric M fluid tik in the stack.

In addition, the liquid supply passage and the liquid storage groove described in "af" are filled with water-resistant fibers carrying fine porous particles to facilitate liquid replacement into the matrix.

Example An example of the Kinai FJ4 will be explained with reference to the drawings.

As shown in Figure 1, the unit block f1) is used between the yin and yang gas poles, and the unit block f1) is a unit cell Jv (
2), and each negative and positive reaction gas supply groove +3 for both i1n, respectively.
Carbonaceous gas separation plates (5) having + [4) and -[4] are stacked alternately, and a retraction plate (7) is interposed to separate the flow (61) every few cells. At the top and bottom of this block +11, there are carbonaceous half plates (5) with a flat outer surface and which are arranged with carous supply grooves (3) or (4) only in the inner opening 1. A frame-shaped sheath (8) made of fluorine thread rubber (trade name: Paiton Rubber) is bonded to the periphery of the half play 15') with a fluorine thread adhesive.

On the flat surface of this frame-shaped sheet/L/part 47I (81 and V11), 3 to 4 sheets of carbon paper with a thickness of 0.4 mm are placed as elastic guides and parts (9).
This guide box member (9) is impregnated with a phosphoric acid electrolyte.

When assembling an arbitrary number of such blocks +1+ into a 51Φ stack, remove the -1 frame-shaped seal part (8i is attached to the flat i1i+ of the lower half-full -1-+5'l of the upper block (1). A liquid storage chamber (101) is formed between the opposing half plates (5') and (5') of the adjacent blocks, which are of the same size on the frame-shaped seal side (8). The seventh month (9) is somewhat compressed and serves as an electrical connection between blocks.

It communicates with the liquid storage groove (127) corresponding to each unit cell through the liquid supply passage (lO) that passes through the liquid storage chamber (lO; is the gas fractionating brake) + 5'051 between these blocks (1). In addition, this liquid supply passage (11) passes through each liquid storage chamber (lO), and the liquid and vinegar supplied from the outside are connected to each storage chamber (lO).
The liquid is sent from the liquid storage groove (12) to the liquid storage groove (12) and absorbed into the entire matrix from the periphery of the matrix (M). (In 121, a water-repellent fiber (13) made of fluororesin containing fine porous particles such as silicon carbide or zirconia is used.) matrix (M
) was attacked by an electric shock on the 7th bone.

Figure 4, Example d half bra) tg+ peripheral notch step 04. ), the other embodiment in FIG. join,
Block sum () 1: A thin % fluorine resin L-) (+5+ is interposed between these seal parts to prevent the seal parts from working together and to separate the blocks i1+. A case where ff+'+ is simply made possible is shown.

In this way, Bron9 (arbitrary number r* of 1+) -1
As is well known, the % 10" stack assembled by the above method is fastened with a metal end plate 111" on the lower end surface via a terminal plate and a button heat insulation plate, as is well known.

Although the frame-shaped seal part (8) is an insulator in the above embodiment, an insulating connection between blocks can also be made from the periphery of the blocks by using an expanded black ship parakink.

In addition to the carbon vapor shape body of the above embodiment, a porous carbon plate, particularly a molded body of expanded graphite, can be used for the elastic liquid guide tube (9B) in the liquid storage chamber (10).

These bullet 14 conductors (9) act as electrical connections between the proton and the tsuku (1), but although the electricity and vinegar solution have ionic conductivity, they have almost no electron conductivity, so there is a light leakage state in the impregnated electrolyte. Even in the depleted state, the electrical conductivity between the blocks is not affected in any way.

Effects According to the present invention, a battery stack is formed by stacking an arbitrary number of unit cells, making it easy to align them on the 3< section side, and replacing deteriorated cells with blocks to prevent misalignment. , it is extremely simple to replace conventional cells.

In particular, in the present invention, a frame-shaped liquid storage chamber is formed in the block depth 11M1 with [JI+''!
A bullet impregnated with liquid! 9. This liquid storage chamber provided on the side of the J guide box is used as a storage chamber corresponding to each cell.9. tti), the stored liquid kl in the battery stack increases significantly,
Is the fluid replacement cycle the same as the traditional one? 4-5 compared to the case of only 7ft
It is possible to extend the battery life by twice as much and improve the operating rate of the battery.

In addition, 1 piece of Hikatsumu Pooka Grain is placed in each liquid storage groove and the mucus passage that communicates between each liquid storage chamber and serves as a distribution path to each liquid storage groove.
If the J mixed water 1 b I I fibrous body is stirred, the matrix will be smoothly replenished by electrolysis n (d, due to capillary action with these fibers) from the stored liquid ♀.

4. Simple explanation of Figure ■■1 Figure 1 is a perspective view of a unit block constituting the fuel cell of the present invention, Figure 2 is a partially cutaway oblique view showing an assembled portion of the same block; FIG. 3 is an enlarged sectional view of the main parts same as above.

4 and 5 are both enlarged sectional views of main parts according to other embodiments.

l...Unit block 2...Unit cell 3.4.
...Reaction gas supply groove 5...To the waste separation plate...
・Half” rate 6...Cooling passage 7...Cooling plate 8...Frame seal side 9...Bullet V1
Conductive part phase 10... Storage chamber 11... Liquid supply passage
12...Liquid storage groove] 3...Holiday water V1 fiber body Figure 3

Claims (1)

[Claims] ■ Divide the city and pond stack into an arbitrary number of unit blocks, insert a frame-shaped sea/l' part around the product of each block, and surround it with the part. A liquid storage chamber is formed by disposing an elastic conductive part that holds an electrolyte in the space, and the liquid storage chamber and the liquid storage groove corresponding to each cell are communicated via a liquid supply passage. Stacked fuel cell, characterized in that ■ Patent t!, characterized in that the electricity-coupling passage and the liquid storage flj are filled with water-repellent fibers that support fine porous particles. 'j Water Wholesale 1 Section 1 4G 87 layers large! ! '4i1 η battery. (2) The stacked fuel cell according to claim 1, wherein the elastic conductive part is made of a porous carbon plate, carbon paper, or an expanded black button material.