JPS6317162Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a fuel cell manifold mounting device, and particularly to an improvement of a sealing member between a battery stack and a manifold mounting collar.

BACKGROUND ART As is well known, the battery stack 1 includes a stack of unit cells in which an electrolyte matrix is interposed between negative and positive gas electrodes, and carbonaceous gas separation plates each having negative and positive gas passages on both sides, and terminals. The upper and lower end plates 2 are tightened and fixed between the upper and lower end plates 2, which are in contact with each other via a plate and a heat-resistant insulating plate (none of which are shown).

On each opposing side of the battery stack 1, there are manifolds 3 on the inlet side and the outlet side for supplying air, respectively.
3 and manifolds 4, 4 on the inlet side and the outlet side for hydrogen supply are attached to the sealing portions of these manifolds. Conventionally, a frame-shaped sealing member 5 made of fluorine rubber as shown in FIG. The upper and lower mounting collars 6, 6 of each manifold were fastened to the upper and lower end plates 2, 2 of the stack using bolts 7.

However, since the left and right mounting collars 8 and 8 of the manifold cannot be tightened with bolts, the pressure against the sealing surface in the stacking direction is not sufficient, and gas (air/hydrogen) tends to leak from these parts. . In order to prevent this, a method of applying a fluoro rubber adhesive 9 to the corners in the stacking direction as shown in Figure 2 was taken, but there was a problem that it was not sufficiently effective against gas leakage. Ta.

DISCLOSURE OF THE INVENTION The present invention forms ribs along the left and right edges of a frame-shaped seal member, and notch steps that can be engaged with the ribs, and each seal member adjacent to each other at the corner of the stack The ribs are connected to each other by engaging with the other notched step through an adhesive, thereby preventing gas leakage from the sealing surface in the stacking direction.

Embodiment An embodiment of the present invention will be described with reference to the drawings, and the corresponding parts are given the same symbols as above.

As shown in FIG. 4, the frame-shaped sealing member 10 of the present invention is formed with a rib 11 rising inwardly along both left and right edges thereof and a cutout step 12 with which the rib can engage. There is.

When installing each manifold 3, 4, first, while sequentially applying the frame-shaped seal members 10 to each peripheral surface of the stack 1, the ribs 11 of each seal member 10 adjacent to each other at the corners of the stack are They are combined in a relationship that engages with the other notch step portion 12 .
The engagement portion between the rib 11 and the notch step portion 12 is firmly joined with an adhesive 13 made of fluorine rubber.

In this way, each of the frame-shaped seal members 10 is closely connected to each other so as to surround the circumferential surface of the stack 1, and the peripheral mounting collars 6, 8 of the manifolds 3, 4 are mounted on each frame-shaped seal member 10. Then, the upper and lower mounting collars 6, 6 are tightened and fixed with the bolts 7 that are screwed into the upper and lower end plates 2, 2 of the stack.

Effects According to the present invention, each frame-shaped sealing member interposed between the battery stack and the manifold mounting collar has ribs and cutout steps formed on the left and right sides of the sealing member, respectively, so that the stacks can be mutually arranged at the corners in the stacking direction. Since the stack is coupled to the stack and tightly surrounds the circumferential surface of the stack, gas leakage from the sealing surface in the stacking direction can be suppressed and battery performance can be improved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a battery stack equipped with a conventional manifold attachment device, FIG. 2 is a plan view of the main part of the same, and FIG. 3 is a perspective view showing a conventional frame-shaped seal member. Fig. 4 is a perspective view of the frame-shaped sealing member according to the present invention, Fig. 5 is a plan view of essential parts of a manifold mounting device using the same sealing member, and Fig. 6 is a schematic sectional view of a battery stack equipped with the inventive device. It is. 1...Battery stack, 2...Stack end plate,
3, 4... Manifold, 5... Frame-shaped seal member (conventional), 6, 8... Manifold mounting collar, 7... Bolt, 10... Frame-shaped seal member (present invention), 11
...Rising rib, 12...Notch step, 13...Adhesive.

Claims (1)

[Scope of utility model registration request] A fuel consisting of a battery stack in which a large number of unit cells and gas separation plates are stacked alternately and tightened in the stacking direction between the upper and lower end plates, and a manifold for each reaction gas is attached to each peripheral surface of the battery stack via a frame-shaped seal member. In the battery, each of the frame-shaped seal members is formed with a rib that rises inwardly along the left and right edges thereof, and a cutout step that can be engaged with the rib, and is formed in the stacking direction of the stack. The sealing members adjacent to each other at the corner portions are connected so as to tightly surround the battery stack with the ribs of one side engaging the notch step portion of the other side, and the upper and lower flanges of each manifold are connected to the upper and lower sides of the stack. A fuel cell characterized in that the fuel cell is fastened to an end plate through seal members.