JPH01209669A - Molten carbonate fuel cell - Google Patents

Abstract

PURPOSE:To increase insulation by winding more than one belt-shaped fastening bands onto a manifold housing and fastening the fastening bands in the circumference direction to press each manifold housing against a stack through an insulating seal. CONSTITUTION:Manifold housing fastening bands 16 are wound onto a manifold housing 13, and fastened in the circumference direction to press the manifold housing 13 against the surroundings of a stack 11. When gas is supplied to the inside of the manifold housing 13 from a gas pipe 15, an insulation seal 10, arranged in the surrounding of the stack, of the manifold housing 13 tends to inflate by gas pressure. However, since the manifold housing 13 is fastened with the fastening bands 16, the insulation seal 10 uniformly presses the surroundings of the stack 11. The insulation seal 10 is uniformly brought into contact with the stack 11. Good insulation condition is thereby maintained.

Description

[Detailed description of the invention] [Purpose of the invention] (, field of use in the fluorescent industry) Akira Motonuma is concerned with the improvement of molten salt-type fuel for Biike.

(Prior Art) The structure of a conventional molten carbonate fuel pond is shown in FIGS. 5 to 8, and the four-tube structure is as follows. A large number of cells 1 and cooling plates 2, which are the basic elements of electromagnetic bodies, are stacked together! f<@body 11
Configure. Thermal materials 6 are stacked on top and bottom 1 of this laminate 11. In addition, the laminate axially tightening bar 7 has a structure like this.
A compressive force is applied in the axial direction by the tightening rod 8 and the adjustment spring 9. In order to insulate the periphery of the side surface of the laminate 11, each side surface (four sides in FIGS. 5 and 6) is covered with an insulating seal 106 as shown in FIG. The insulating seal 10 is pushed away from the laminate 11f using a marbold 4 and a manifold tightening spring 5 to increase the layer density against the laminate 11f. The shape of the manifold 4 (as shown in Figure 6 and Fig. 6) is a square prism, polygon, or square shape.

(Problem to be solved by the invention) In this more structured structure, nil 6,
There was 1. There are eight ways to increase the insulation properties of the laminate 11 by densely layering the insulating seal 10 in the laminate.

In order to make it dense 7d, it is necessary to apply uniform pressure (uniform pressure) to the seal surface of the seal, but it is necessary to apply uniform pressure to the seal surface.
0 to 700°C), press the insulation seal 10 onto the insulation seal pressing surface of the manifold 4.
temperature distribution and thermal deformation.

In addition, since the manifold tightening springs 5, which provide a force to substantially press the manifold, are attached only to the upper and lower ends, the lower end of the manifold may be deformed. The pressing surface creates an irregular surface 12 and the insulating seal 10 is subjected to an unconstrained -f1 weight distribution.

This means that the adhesion of the insulating seal to the laminate deteriorates, and as a result, the insulating properties and power generation efficiency of the jet body deteriorate.

Therefore, one object of the present invention is to provide an excellent molten carbonate fuel cell that improves the adhesion between the product and the insulating seal (thereby reducing the insulation properties and the efficiency of the shield). purpose.

[Structure of the invention]

(Means for checking divisions) Fujomei is configured to feed gas between the manifold housing and the insulating seal, and use the gas pressure to press the insulating seal against the laminate with uniform pressure. Furthermore, the gas pressure causes the insulating seal to push against the stack, and the reaction force tries to separate the entire manifold from the stack.
In order to suppress this, multiple band-shaped fasteners are installed around the outside of the manifold housing.

That is, the molten carbonate fuel formation pond of the present invention.

A gas is sent between the manifold housing and the insulating seal by placing it in a manifold that is in close contact with each side of the laminate.
In order to press the insulating seal against the stack body due to the internal gas pressure generated, and to suppress the reaction force generated between the insulating seal and the stack body, a plurality of strips are tightened around the outer periphery of the manifold housing. When purchased, each manifold housing is pressed against the stack through an insulating seal by winding the tool and tightening the fastener so that tension is applied in the same direction.

(Function) When gas is fed under a certain pressure into the manifold, which is surrounded by a manifold housing with a hollow interior and an insulating seal attached to the side of the stacked body of the housing, the gas pressure causes a relatively soft The insulation seal will begin to swell. In order to suppress this bulge, a plurality of band-shaped fasteners are wrapped around the outer peripheral surface of the manifold casing, and when the band is tightened by the tightening device and tension is applied to the band, the manifold casing is pressed toward the product +i# body side. The manifold is pressed against the product body in a state where the pressing force against the manifold casing due to the tension of the band and the reaction force due to the gas pressure applied to the insulating seal are balanced. At this time, uniform pressure acts on the entire sealing surface of the insulating seal due to gas pressure (Archimedes' principle). Therefore, the entire surface of the insulating seal is pressed by uniform pressure, and f! Care must be taken to ensure good insulation.

Furthermore, by adjusting the gas pressure to -J4, arbitrary uniform pressure can be easily achieved, resulting in the following advantages.

First, the first body is assembled like a trowel, but when the entire body is assembled as a fuel cell and begins to operate, it begins to shrink in the axial direction.For this reason, the conventional device has an insulating seal in the manifold that was installed at the beginning, 1j There is a risk that relative displacement will occur between the bodies and the initially installed insulation condition will deteriorate, or
There was a risk that the insulating seal would be damaged, but in the present invention, when the gas internal pressure in the manifold is sufficiently reduced when it begins to shrink, the pressing force on the insulating seal is reduced, reducing damage caused by rubbing during relative displacement of the laminate. be able to. Furthermore, once the shrinkage has subsided, when the gas pressure is returned to its original state, the insulating seal is again subjected to uniform pressure and is brought into close contact again. In this way, according to the present invention, insulating seals can be made for ¥! Adhesion can be controlled arbitrarily.

(Example) The present invention will be described in detail below with reference to the drawings.

1 to 4 show an embodiment of a molten carbon dioxide fuel cell according to the present invention 1. 1 and 2 in FIG. A laminate 11 is constructed.

The lower end of the laminate is supported by a frame 19 via a heat insulating material 6, and the upper end is similarly subjected to a compressive force via the heat insulating material 6 by a tightening bar in the axial direction of the laminate.

Furthermore, all four outer surfaces of the laminate are covered with insulating seals 10. The manifold 4 is composed of this insulating seal 10, a manifold housing 13 that houses the insulating seal 10, and a gas pipe 15 that feeds gas into the manifold housing 13. The inside of the manifold housing 13 is hollow, and when gas is fed through the gas pipe 15, uniform pressure acts on the insulating seal 10.

If this continues, the insulating seal 10 will be damaged by the gas pressure.
A bulging reaction force is generated and the stack is separated from the laminate 11.Therefore, at least two
Wrap the manifold housing tightening band 16 longer than the
By tightening, the manifold housing 13 is pressed against the product 11.

In this way, the manifold housing 13 is attached to the tightening band 161.
Since it is pressed against the one-layer body and fixed, the insulating seal 10 can be sealed even when gas pressure 14 is applied.

The product 1 is pressed against the product 1 body 11 with uniform pressure without separating from the product 1 body 11. The gas pressure direction is indicated by an arrow. In this way, the insulating seal 10 is uniformly adhered to the stack 11, and a good insulation state can be obtained.

In addition, since the gas pressure can be controlled arbitrarily, the insulating seal 10
The adhesion to the laminate 11 can be arbitrarily changed.

FIG. 2 is a cross section of FIG. 1, and FIG. 3 is a 741 example in which the first outer peripheral concave surface is roughened. In this case, the outer peripheral cross-sectional shape of each manifold housing has a circular arc shape having the same center. Each manifold is tightened in the circumferential direction by tightening two or more manifold case tightening bands tightly around the manifold case in the circumferential direction and applying tension using the manifold tightening band tightening device 17.

Further, FIG. 4 is a second example of the cross section of FIG. 2.

Insert the manifold housing holding jig 18% into the manifold imitation body with this -JA, which has a cedar shape (or rectangular parallelepiped shape, and has a circular arc around its outer periphery), and tighten the manifold housing around this presser foot ft3 tool 18. It has accessories attached.

〔Effect of the invention〕

Molten carbonate fuel cell sauce C according to the present invention.

Attach the manifold housing tightening band 16 to the manifold housing 13, and tighten the tightening band 16 by the tightening band tightening device 17.
When the manifold housing 13 is tightened in the circumferential direction, the manifold housing 13 is pressed against the outer peripheral edge of the side surface of the integral stack 11. Here, gas is fed into the manifold housing 13 from the gas pipe 15 and gas pressure is applied. Here, the laminate 11 of the manifold housing 13
11111 However, the seal 10 tries to inflate due to gas release, but the manifold unit 13 is sufficiently pressed by the tightening band 16, so the insulating seal is Phrases - To press with pressure G konararu. In this way, the insulating seal 10 can uniformly cover the laminate 11, and a good insulation state can be obtained.In addition, the gas pressure can be easily controlled, resulting in close contact. can be changed freely. This power has the following advantages.

In other words, when the laminate 11 is assembled (laminated)
Sometimes it shrinks in the axial direction, and the whole book shrinks on the order of several centimeters. Therefore, since a relative displacement occurs between the insulating seal 10 and the side surface of the product, the insulating seal 10 initially
If they are kept pressed together with a constant force, they will shift from each other and the insulating seal 10 will be damaged. At this time, with the apparatus of the present invention, the gas pressure is initially weakened to prevent the relative displacement movement between the insulating seal 10 and the all-in-one assembly 11 from culminating. After sufficient contraction, the gas pressure can be increased to a predetermined uniform pressure to tightly seal the insulating seal 10 to the laminate 11.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view showing an implementation row of the present invention, and FIG.
tA;aJ'r plane view of the embodiment shown in the figure;
Figure 4 is a 4Jll location diagram of the embodiment of Fuo Akinoike, Figure 5 and Figure 6 are cutaway perspective views of conventional car products, Figure 7,
FIGS. 8 and 8 are vertical sectional views illustrating the operation of the conventional example. 1...Cell, 2...Cooling plate, 3...Cooling piping, 4
...Manifold, 5...Manifold tightening spring. 6... Insulation material, 7... Laminated main direction tightening bar, 8...
...Tightening rod, 9...Tightening force adjustment spring, 1
0... Insulating seal, 11... Laminated body, 12... Irregular surface, 13... Manifold housing, 1.1... Gas pressure, 15... Gas pipe, II3... Manifold housing Tightening band, 17... Tightening band tightening device, 18... Manifold i body holding jig. 19... mount. Agent Patent Attorney Noriyoshi Chika Hikaru Ichikawa Matsuyama 2nd IyA Father-in-law 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Claims] In the manifold that is in close contact with the side surface of the fuel cell stack, gas pressure is applied between the manifold housing and the insulating seal that is in close contact with the stack to provide electrical insulation, and the insulating seal is pressed against the stack and the outer circumference of the manifold housing is pressed. A pressing means that presses all the manifold casings against the laminate through an insulating seal with a force greater than the gas reaction force by installing a plurality of band-shaped fasteners on the holder and tightening the fasteners so that tension is applied in the circumferential direction. A molten carbonate fuel cell characterized by comprising: