JPS6044966A - Fuel cell module - Google Patents

Abstract

PURPOSE:To simplify a module and increase its reliability by directly supply cooling media to a stacked cell in a pressurized container and exhausting vaporized media in the pressurized container. CONSTITUTION:Fuel gas is supplied to a stacked cell from a reaction gas supply hole 8a through a manifold 6a and flows downward through grooves installed between unit cells 1 and separator plates 2 or cooling plates 3. Air is supplied to the stacked cell through a manifold 6b. Insulating coolant 105 put in a pressurized container 11 is supplied to a coolant header 101 with a pump 103, and supplied to cooling plates 3 through a coolant pipe 102. Vaporized coolant in cooling plates 3 is exhausted to the pressurized container 11, then liquified with a condenser 105. Liquified coolant is stored in the bottom of the container 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for cooling a fuel cell stack consisting of stacked fuel cells having a number of stacked t'L'fc cells.

[Prior art]

A conventional device of this type is shown in FIG. In the figure, 1 is a unit cell of a fuel cell consisting of a matrix and two electrodes, and 2 is an adjacent unit cell /I/1.
Place the separator plate between 7'L;/(separator plate).

3 is a NYC cooling plate inserted every several unit cells. 4a is composed of several unit cells 1. Separator plate 2.
an upper holding plate placed on the integral upper part of the cooling plate 3;
At the bottom of 4bFi is f'1. 'fc Lower lower plate 5 is a bolt that tightens the upper presser plate 4a and the lower presser plate 4b. 6a is a NYC manifold A which is constructed from the above Z5 and is provided laterally in contact with the FC stacked battery;
'There are two spaces VC Rikien Sakuen on JJ board a7a. 8a is a supply port for the FC reaction gas provided in the manifold a6a, and 8b is a valve for the manifold J, the partition plate a6aM partition plate a7a, and the supply port 8a for the reaction gas is provided at the position of N pairs (!: 7"). A similar manifold b6b is provided on the opposite side of the central mold 1111 to face the manifold a6b for mutual pressure (not shown).

Insert the cooling pipe into 9 cooling plates, 10a is 4iM
(Headers a and 10b installed at the inlet of the cooling pipe of RIi
)j n'rc header b provided at the outlet of the plurality of cooling pipes.

This is a pressure vessel containing a 11-inch IW battery, cooling pipes, etc.

Explain the action to the arrow. The fuel gas is supplied to the stacked battery from, for example, the IX gas supply port 8a through the manifold 68. The fuel gas flows downstream through a large number of grooves provided between the unit cell 1 and the separator plate 2 or the cooling plate 3. On the other hand, air, which is an oxidizing agent, is supplied to the laminated layer '1; L pond through the manifold 6b & valve. This air passes through the unit center Jvi and flows downstream through the 'nter groove provided opposite to the fuel gas groove. A well-known electrochemical reaction occurs between the fuel gas and the air fuel 'ttc unit unit cell to generate vehicle power and at the same time generate heat. A part of this heat heats the remaining fuel gas and air and is carried away to the outside, but most of it is transferred to the cooling plate 3 and flows through the cooling pipe 9 provided within the cooling plate. Due to the flowing cooling water, υ is pumped out to the outside by 7'L.

. - 10,000, the cooling water is supplied from the i part of the pressure vessel 11 to the header a1.
Supplied through 0a, fL distributed to the cooling pipe 9,
Ru. The cooling water operates in such a way that the temperature of the cooling water rises or evaporates due to the heat generated by the battery through the Q cooler, and is discharged to the outside from the header btob.

The conventional device is constructed as described above, and since the cooling water flows inside the stacked fuel cell, the six cooling water systems must have a complicated pressure-resistant structure.

[Summary of the Invention] This invention was made to eliminate the drawbacks of the conventional method described above, such as the high cost of water quality control. [,1 changing electricity id! A cooling medium having three properties is passed through a closed cooling system to laminated heavy oil stored in a pressure vessel.
(In order to supply 1m of coal, the overall module configuration is 1j).It is intended to be a simple and reliable fuel cell module.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. Second
In the figure, 1 is a unit cell, 2 is an fL7c separator plate placed between adjacent unit cells 1, and 3 is a cooling plate inserted every several unit cells. 4a is a plurality of unit cells 1. Separator plate 2. An upper presser plate 4b is placed on the top of the laminate of the cooling plate 3, and an upper presser plate 4b is placed on the bottom.
L7 is the lower valve plate.

5 is a bolt that tightens the upper holding plate 4a and the lower valve plate 4b.

6b is the side surface vC of the fLfC stacked battery configured as above.
The manifolds 7-L and 7n are adjacent to each other, and are separated into two spaces by a partition plate a7aK inside.

8a is a fuel gas supply port provided in the manifold a6a, abu is a partition plate aZa in the manifold a6a;
A valve n'fc is provided at a position opposite to the supply port 8a and is a one-way outlet for reaction air. Similar manifold b&, b
As shown in FIG. 3, the manifolds a6a are provided on opposite sides of the stacked battery facing each other. Manifold b6b is separated between two walls by a partition plate b7b.

The fact that these components of the stacked battery are housed in the pressure vessel 11 is similar to the prior art shown in FIG. Furthermore, 101 is a refrigerant header.

102 is a refrigerant pipe 3 branched from the refrigerant header 101
, 103 is the refrigerant in the plurality of refrigerant headers 101? It is a pump that supplies 104 is an insulator provided between the sum number of refrigerant headers, and 105 is a refrigerant.

I will explain the operation shortly. As in the conventional method, the fuel gas is supplied to the stacked battery from the reactant gas supply port 8a, for example, through the manifold 6a. The fuel scum is disposed between the unit cell 1 and the separate layer and the cooling plate 3.
,. Alternatively, electricity, which is an oxidizing agent, is supplied to the stacked battery through a manifold 6b4 and a valve. The air is connected to the unit cell 1 and is installed opposite the hiJ combustion gas groove.
'14 〃1 electric power costs 71-. The fuel gas and air are 11") Electric 7HJ Unino 1 Cell 1 is a well-known electrifier! Ryoji anti LP1, 1- generates electric power and at the same time generates reaction heat. One of this heat The remaining fuel gas and air (as a result, the temperature rises and is carried away to the outside), but most of it is transmitted to the cooling plate 3 and flows inside the cooling plate.
'] The surface solvent in the tank is evaporated and turned into steam and discharged into the pressure vessel.

The rlF medium 105I'f is placed inside the pressure vessel 11 as a light chamber.

The liquid is stored in the lower part of the pressure vessel 11 in a liquid state. Refrigerant 105 is pumped up from the bottom of the container by pump 103. Eaves supplied to the refrigerant header 101.

The refrigerant is supplied to the cooling plate 3 through the refrigerant pipe 102 branched at θ. The fc vapor that evaporates within the cooling plate is /' of the cooling plate 3.
] Opening 1 to the pressure vessel 11, located on the opposite side to the pressure vessel 102.
] into the pressure vessel 11 through the section.

7'Lfc steam discharged into the pressure vessel 11
The refrigerant is condensed and liquefied by a condenser 105 K provided in the battery module 10, and is stored again in the lower part of the pressure vessel 11.In order to prevent the gas that reacts in the battery module from leaking into the container, the refrigerant is kept at a temperature close to the operating temperature of the battery. is 200
It is desirable to have a vapor pressure that slightly exceeds the supply pressure of the reaction gas at around ℃.

'f. In order to set the pressure of the container housing the battery stack to a higher level than the refrigerant vapor pressure, it is necessary to fill the pressure container with a non-condensable gas such as nitrogen.

In the above embodiment, the medium pump 103 and the condenser 105 are installed inside the pressure vessel 11.
These may be provided outside the pressure vessel 17 and connected via piping. In the above embodiment, the refrigerant header 101 is connected to the cooling plate 3 through the refrigerant pipe 102.The refrigerant header may be provided inside the cooling plate 3 as shown in FIG.

〔Effect of the invention〕

As described above, according to the present invention, the structure is such that the 111M is vaporized inside the moving plate and the vapor is discharged to the same pressure vessel (c). is tom r
There is no need to use lrl Gt construction, and since an electrically insulating medium is used as the refrigerant itself, the quality of the cooling water can be controlled.

There is no need to take any precautions such as measures against piping.
This has the effect that the entire fc unit can be simplified by one unit and a highly reliable device can be obtained.

[Brief explanation of drawings]

FIG. 1 shows the configuration of a conventional fuel cell module.
FIG. 2 is a configuration diagram showing a fuel tank module according to an embodiment of the present invention, FIG. 31J is an enlarged perspective view of a cooling plate 1s according to the embodiment of FIG. 2, and FIG. FIG. 7 is an enlarged perspective view of a cooling plate portion according to another embodiment VC. . 1...Unit cell, 2...° separator plate, 3...
・6 Reversing plate, 4a... Lower valve plate, 4b... Lower valve plate, 5... Bolt + 6a... Manipole f'a-
6b...-Manifold b,? a... Partition plate, 8a.
...Reaction gas supply port. 81)... Reaction gas outlet, 9... Cooling pipe, 10a
...Hender a, 10b...Header b, 11...Pressure vessel, 1o1...Refrigerant header, 102...Refrigerant pipe, 1o3...Pump. 104... Insulating joint, 105... Refrigerant. In addition, in FIG. 1, the same reference numerals indicate the same or equivalent parts. Agent Masuo Iwa '4 1 - 16.3 Chopsticks 2! '- 3 Figure 3 No. 4 Figure D-71'shi' [1 mountain +li rq (spontaneous) - 'I effect'11°ll<'l°7111' bar 1, 4i
1 no Omote Elementary School '1 Toki 4 (j Showa 58-151915 No.:L
If f+li+1 is 4-! Relationship with IGf'l- 1.11°Kidashi 19 (1 person I 1. Place Higashi 1; j Tokyo F-dai 111-ku Marunouchi', 1112
Number: 3.1. te'1 title (601) -', Representative Ministry of Ryodenki Co., Ltd. Part 111 A, G Part-1 Ryo'Ichiki Co., Ltd. 5, Column 6 of the scope of claims of the specification subject to amendment, Amendment Amend the claims as shown in the Attachment of Contents. 7. A document stating the scope of claims after the amendment to the list of attached documents One or more copies of the scope of claims after amendment (1) A plurality of fuel cells formed by sandwiching a matrix holding an electrolyte between two electrodes In the fuel cell module 17c, in which a plurality of cell stacks in which a plurality of cells are laminated via a separator plate or a cooling plate is housed in a pressure vessel, the cooling medium is provided on the cooling plate by directly filling the pressure vessel with a cooling medium. The inlet of the pressure vessel is connected to the liquefied cooling medium of the pressure vessel, and the outlet of the pressure vessel is connected to the chamber of the upper ml pressure vessel, and the pressure vessel is further connected to a condenser for the vaporized cooling medium. A fuel cell module comprising a delivery means for supplying the cooling medium to the inlet, and the cooling medium has electrical insulation properties. (2) The fuel according to claim 1, wherein the cooling medium has a vapor pressure higher than the pressure of the fuel gas supplied to the battery module with respect to the operating temperature of the battery stack. Battery module 1. (3) The fuel cell module according to claim 1, characterized in that a non-condensable gas is introduced or discharged into the chamber of the pressure vessel.

Claims (1)

[Scope of Claims] (Several fuel cells formed by sandwiching INJi deliquefaction liquid retention matrix between two electrodes) (Rake 4
)1. In a fuel cell module housed in a pressure vessel, which is a cell stack stacked with cooling plates. A cooling medium is directly filled into the pressure vessel, and an inlet for the cooling medium provided on the cooling plate is connected to the liquefied cooling medium of the pressure vessel, and an outlet is placed in the chamber of the pressure vessel. The fuel cell module is characterized in that the pressure vessel is connected to a condenser for a vaporized cooling medium, and further includes a delivery means for supplying the cooling medium to the inlet, and the cooling medium has electrical insulation properties. . (2) The cooling medium has an operating temperature V of the battery stack.
2. The fuel cell module according to claim 1, wherein a vapor pressure higher than the pressure of the fuel gas supplied to said cell module is applied to said fuel cell module. (31) The fuel cell module according to claim 1, characterized in that a non-condensable gas is introduced or discharged into the chamber of the pressure vessel.