JPS58137972A - Fuel cell - Google Patents

Abstract

PURPOSE:To simplify the construction and facilitate monitor of water leakage from the piping to a cooler by installing an inlet branch pipe and an outlet branch pipe which are connecting between an inlet main pipe and a cooler, and an outlet main pipe and a cooler, between manifolds respectively. CONSTITUTION:Cooling water is introduced from a supply pipe 18 which is fixed to a cell holder 77 to an inlet main pipe, and fed to a cooling pipe from an inlet branch pipe. After cooling, water is exhausted to the outside through an opposite path to a supply path, that is, from an outlet converging pipe 10, an outlet main pipe 12, and an exhausting pipe 19 in order. In short, cooling water flows as shown in a break line arrow. A cooling system piping is connected in such a way that the inlet main pipe 11 and the outlet main pipe 12 are connected to the supply pipe 18 and the exhausting pipe 19 with a frange 78 respectively, and the inlet branch pipe 11 and the outlet branch pipe 12 are connected to the inlet main pipe 11 and the outlet main pipe 12 with a joint 75 respectively, and they are connected to the outside with a manifold 13. Therefore, assembly and deassembly are easy and check is also easy.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel cell, and in particular relates to a self-gravity fuel cell by simplifying the cooling structure and pipes of the cell main body.

A conventional fuel cell is a fuel cell that has an air electrode that has an air flow path and a fuel electrode that has a fuel gas flow path. A plurality of fl-kA regulators are arranged to prevent air and fuel gas from mixing.

As a means of supplying air and fuel gas to the stacked batteries, manifolds are fixed to the four sides of the stacked batteries, and one side of the opposing manifolds serves as an inlet and the other serves as an outlet. Air or fuel gas is supplied all at once.

1 again. Generally, in a fuel cell, it is necessary to maintain a constant temperature of 17L. In order to cool the excess fIIk generated when one power generation is performed, a cooling pipe is arranged inside the battery, passing through the manifold.

Below is 1 about the structure of fuel cells since It and its drawbacks.
11 using Figure 3 from Figure 111! Tomorrow.

jll- is the disassembly of the battery components, and a large number of lips are provided for both fuel 1i1 and air iis to form gas passages 3. The primary and both poles and the 4 flat mK are installed so that the catalyst layer 4 and the 1 trix S for electrolyte retention are installed. arranged orthogonally,
A pair of unit cells is constructed. Reference numeral 6 denotes a fuel and air separator, which is arranged for each unit cell. 7 is cooling pipe 8t! A cooler with one groove that can be installed in each unit cell. In addition, the cooling pipe 8 has an inlet branch w9. It is connected to the outlet merging pipe 10. Furthermore, the inlet branch pipe 9. The outlet merging pipe 1G has an inlet main pipe 11° and an outlet main pipe 12.
The cooling medium is connected to and the cooling water flows through it.

FIG. 2 shows a fuel cell stack m, and FIG. #E3 shows a fuel cell stack lIA arranged in a storage tank.

In these drawings, reference numeral 1B indicates a mania old which forms a space for supplying and discharging gas, and is installed on all four sides of the stacked battery 14. Each mania old 13 has gas supply and exhaust pipe 1! ! , 16 are provided to penetrate through the storage tank 17, making it possible to supply and discharge gas from outside the storage tank. Also,
Population control for cooling11. Since the outlet main pipe 12 is disposed inside the mania old 13, it is a cooling water supply/discharge pipe 1g.

19 is Marfold 1m. It is piped to penetrate the storage tank 17.

With this configuration, the oxidizing agent was used to blow out the air as shown by the arrow. Water *', which serves as fuel, flows in the direction shown by the arrow, and p power is generated through an electrochemical reaction in the catalyst section.

In the manifold lid fuel cell, the structure is very complicated because the cooling pipe 8 is arranged in the manifold old 136.9. There are drawbacks such as concerns about water leakage inside the Mania Old 13, making maintenance and inspection difficult. Furthermore, the inside of the FF Nifold 13 is filled with phosphoric acid vapor in an electrolytic solution], and contact with this phosphoric acid vapor is also considered.

There are disadvantages such as limited materials.

An object of the present invention is to provide a fuel cell with a simple structure and high reliability by improving the structure for supplying and discharging a cooling medium to a cooler arranged for each of a plurality of single cells.

A feature of the present invention is that the inlet branch pipe and the outlet branch pipe that connect the inlet and outlet main pipes with the cooling leakage pipes are arranged between the respective manifolds to form a fuel cell.

An embodiment of the present invention will be described below with reference to FIGS. 4 and 5.

Fig. 4 shows a state in which the battery of the present invention is stored in a storage tank and a pipe connected to the cooling pipe is arranged between the mania olds. The state is shown in Figure 115. As shown in these drawings, the pipes to the cooler are provided with an inlet branch pipe 9 and an outlet merging pipe 1G at the thresholds of the mania olds 13 adjacent to each other, and these inlet branch pipes and outlet merging pipe 9 Several cooling pipes 8 are fixedly arranged in the .
1 and the outlet main pipe 12. The inlet main pipe 11 and the outlet main pipe 12 are connected to a battery clamping plate 71 as shown in FIG.
It is supported by a receiver 74 fixed with bolts 76.

In such a configuration, the cooling water flowing as a cooling medium flows through the water supply pipe 11119 fixed to the battery holder 77 and the main pipe 11.
The cooling pipe is guided from the inlet branch pipe 9 to the cooling pipe.

8 will be introduced. Here, a plurality of cooling pipes 8 are arranged so that cooling water is uniformly distributed within the battery. Next, the cooled water is discharged to the outside through the reverse route to the water supply, that is, through the outlet merging pipe 1G and the outlet main pipe IL discharge pipe 190111. In other words, the cooling water flows like an arrow.

The cooling system pipes include the inlet and outlet main pipes 11 and 12, and the water supply and discharge pipes 18 and 19 are 9% connected to the fufunji 78. Entrance @
Inlet and outlet junction pipe 9.10 and inlet and outlet main pipe 11.1
1 is connected to the mania old 1 by the joint 7B.
Since the connections are made externally, assembly and disassembly work is very easy, and inspection is also facilitated.

Generally, when a fuel cell generates one power, the temperature inside the battery storage tank is maintained at high temperature II (approximately 190C).9. When stopped, the temperature is normal. therefore.

Expansion and contraction due to cooling water temperature changes occur in the inlet and outlet main pipes 11.1! and inlet branch pipe and outlet merge pipe L let
Where does it occur? They slow O expansion and contraction.

Number 9, Uke ζ 614d speed, ride possible 11 trunk construction 7, Mae, @ hand 7 glue? It is made of a V-medium and rectangular pipe. Especially fitting 7! ! If it is filled with an insulating material, an electrical short circuit with the cooling pipe 8 can be prevented, which is more effective.

As described above, if the fuel cell is constructed as in the present invention, s#
Since the cooling device, inlet and outlet main pipes, and the inlet, branch, and outlet convergence pipes are not installed in the manifold, the structure is very simple, and there is no risk of water leakage from each piping to the cooler. The effect of this is that it can be easily monitored and reliability is greatly improved.

[Brief explanation of drawings]

FIG. 1 is an exploded view showing the conventional fuel cell configuration, #Iz is a schematic perspective view showing the stacked structure of FIG.
FIG. 4 is a plan view showing a fuel cell 1* in a state S stored in a storage tank according to an embodiment of the present invention, and FIG. 5 is a side view of FIG. l...Fuel@%2...Air electrode, 7...Cooler, 9
...Inlet branch pipe, 10...Outlet*flow pipe, 11...
Inlet main pipe, 12... Outlet top '1.13... Manifold. ) 81 times

Claims (1)

[Claims] 1. A stacked battery is formed by stacking a plurality of quasi-cells each having an electrolytic at in connection with an air electrode and a fuel electrode having gas flow passages, and air and fuel gas are supplied to the four sides of the stacked battery. In addition to fixing the L7 old, inlet branch pipes and outlet merging pipes connected to the inlet and outlet main pipes are assembled for each multiple single cells, and the amount of cooling through which the cooling medium flows is arranged.
Then, the inlet branch pipe and the outlet merging pipe connecting the inlet and outlet main pipes and the cooler are mutually vhKill! (Between the manifold) A fuel cell with the derived energy as a sign.