JPS6122576A - Fuel cell - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Field of application of the invention] The present invention relates to fuel cells.

[Background of the invention]

FIG. 2 shows a conventional example of a fuel cell.

As shown in the figure, a power generation section 2 having a stacked structure of unit batteries 1 has a cooler (not shown) inserted therebetween for extracting heat loss of the power generation section 2 to the outside. Power generation section 2
A seal plate 3, current collector plates 4a, 4b, and insulating plate 5 are arranged above and below, and these are tightened using upper and lower clamping fittings 6a, 6b and a tightening rod 7 inserted into these clamping fittings 6a, 6b. Although it is fixed, the insulating plate 5 is arranged only on the upper side of the power generation section 2.

Manifolds 8 for supplying and discharging reaction gas to and from the power generation section 2 are attached to all sides of the power generation section 2 via sealing materials 9 that prevent leakage of the reaction gas. This manifold 8 passes through the pressure vessel 11 via an insulating joint 10, so that reaction gas can be supplied and discharged from the outside. Also, a support stand 12 is provided between the lower tightening fitting 6b and the pressure vessel 11.
is provided. This support stand 12 is made of an insulating material for the following reasons. That is, unit battery 1
Let Eo be the generated voltage for one battery, and n be the number of stacked layers, then the potential difference across the stacked battery will be nEo. Since several stacked batteries are connected in series and used, the potential of the lead wires 13a and 13b at both ends of the stacked battery, which is the power generation section 2, becomes a high potential that is an integral multiple of the number of stacked batteries connected in series. This is because it is necessary to electrically insulate the high-potential power generation section 2 and the pressure vessel 11, which is at ground potential. The manifold 8, the clamping fittings 6a, 6b, and the clamping rod 7 are connected to the lead wire 13b via the lead wire 14, and are at the same potential as the lead wire 13b.

In the figure, 15a and 15b are terminals.

In the fuel cell constructed in this manner, the support base 12 is made of insulating material such as insulator, epoxy resin molded product, ceramic, etc., so that it is not affected by bending moment due to shock or vibration during transportation or earthquakes, and the operation of the power generation unit 2. Easily damaged by thermal heat shock caused by stopping.

[Purpose of the invention]

The present invention has been made in view of the above points, and it is an object of the present invention to provide a fuel cell with improved earthquake resistance.

[Summary of the invention]

That is, the present invention provides a pressure vessel, a power generation section housed within the pressure vessel and having a stacked structure of a plurality of unit batteries,
A manifold is arranged on the side surface of the power generation section and supplies and discharges a reactive gas to and from the power generation section. In the fuel cell, which is tightened by a tightening rod inserted into a fitting, and a support base for supporting the power generation section is provided between the lower tightening fitting and the pressure vessel, the underlined fitting and An insulating plate is inserted between this and the current collector plate facing the current collector plate, a stand made of an insulating material is provided between the tightening rod and the lower tightening metal fitting, and the support base is formed of metal. This is characterized by the fact that the power generation section and the lower fastening fitting are insulated by the insulating plate and the stand, and the support base is made of metal.

[Embodiments of the invention]

The present invention will be explained below based on the illustrated embodiments. One embodiment of the invention is shown and discussed in FIGS. 1 and 3. Note that parts that are the same as those in the conventional system are given the same reference numerals, and therefore their explanations will be omitted. In this embodiment, an insulating plate 16 is provided between the lower clamping metal fitting 6b and the current collector plate 4b facing it, and a stand 17 made of an insulating material is provided between the tightening rod 7 and the lower clamping metal fitting 6b. In addition, the support stand 12a was formed of metal.

By doing this, the power generation section 2 and the lower clamping fitting 6b are insulated by the insulating plate 16 and the stand 17, and the support base 12a is made of metal, making it possible to improve earthquake resistance. It is possible to obtain a fuel cell with

That is, the lower tightening fitting 6b and the current collector plate 4b facing it
An insulating plate 16 was provided between the lower tightening fitting 6b and the tightening rod 7, and an insulating stand 17 was provided between the lower tightening fitting 6b and the tightening rod 7. By doing this, the lower clamping bracket 6b and the power generation part 2 via the current collecting plate 4b are insulated by the insulating plate 16 and the stand 17, so that the pressure between the lower clamping bracket 6b and container 1
The support stand 12b provided between the support base 12b and the support base 12b need not be formed of an insulating material as in the conventional case, but can be formed of a metal. Therefore, since the support base 12a is made of metal, its strength against bending moments due to shocks and vibrations during transportation and earthquakes is improved, thereby improving seismic properties and improving reliability in terms of seismic resistance. Furthermore, since the support base 12a is made of metal, the work of attaching the fastening fitting 6b is facilitated.

Another embodiment of the invention is shown in FIG.

In this embodiment, the insulating plate 16a was formed with a groove provided on its side surface. By doing so, the creeping distance of the insulating plate 16a becomes larger, and the insulation properties are increased. For this reason, the power generation unit can now be supported by a support stand made of metal.
The same effects as in the case described above can be achieved.

〔Effect of the invention〕

As described above, according to the present invention, the power generation unit can be supported by a metal support base, and the seismic resistance of the fuel cell is improved, thereby making it possible to obtain a fuel cell with improved seismic resistance.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional side view of the main parts around the lower fastening fitting of an embodiment of the fuel cell of the present invention, FIG. 2 is a longitudinal sectional side view of a conventional fuel cell, and FIG. FIG. 4 is a longitudinal sectional side view of a main part of the circumference of the lower fastening fitting of another embodiment of the fuel cell of the present invention. 1... Unit battery, 2... Power generation section, 4a, 4b...
Current collector plate, 6a... Upper tightening fitting, 6b... Lower tightening fitting, 7... Tightening rod, 8... Manifold, 11.
...Pressure vessel, 12a-...Support stand, 13a, 13b
, 14"・Lead wire, 16.16a...Insulation plate, 17
... Distant made of insulating material.

Claims (1)

[Claims] 1. A pressure vessel, a power generation section housed in the pressure vessel and having a plurality of unit batteries stacked and configured, and a power generation section disposed on a side surface of the power generation section and connected to the power generation section. and a manifold for supplying and discharging a reaction gas, the power generating section is tightened by upper and lower clamping fittings and a tightening rod inserted into the tightening fittings through current collecting plates provided on the upper and lower sides of the power generating section, and the lower In a fuel cell in which a support base for supporting the power generation section is provided between the clamping fitting and the pressure vessel, an insulating plate is provided between the lower clamping fitting and the current collector plate facing thereto. A fuel cell characterized in that a stand made of an insulating material is provided between the tightening rod and the lower tightening fitting when inserted, and the support base is formed of metal. 2. The fuel cell according to claim 1, wherein the insulating plate is provided with a groove on its side surface.