JPS58155664A - Molten-salt type fuel cell - Google Patents

Abstract

PURPOSE:To equalize the temperature distribution during the operation of a molten-salt fuel cell, and enable the operational temperature of the fuel cell to be regulated by providing a battery frame with flow paths, which are used for supplying and exhausting both a heating medium and a refrigerant and which can perform cooling of either external heating or self-heating. CONSTITUTION:The central part of a battery frame 1 has a hollow space which is formed by a fuel chamber 2, current-collecting projections 3, and refrigerant-and-heating-medium paths 4 which also serve as current-collecting projections. In the hollow center of the battery frame 1, refrigerant-and-heating-medium flow paths 7 each extending from a refrigerant-and-heating- medium inlet 5 to a refrigerant-and-heating-medium outlet 6 are provided. The peripheral part 8 of the battery frame 1 is provided with fuel-inlet-side paths 9 and fuel-outlet-side paths 10 which are connected to the fuel chamber 2, as well as oxidant-inlet-side paths 11 and oxidant- outlet-side paths 12 which are connected to an oxidant chamber 13 provided on the back surface of the battery frame 1. In the central part of the battery frame 1, there are the oxidant chamber 13, oxidant-chamber-side current-collecting projections 14 and oxidant-chamber-side refrigerant-and-heating-medium paths 15, and refrigerant-and-heating-medium flow paths 7 each extending from an oxidant-chamber-side refrigerant-and-heating-medium inlet 16 to an oxidant- chamber-side refrigerant-and-heating-medium outlet 17 are provided. Here, these members cross perpendicularly to the current-collecting projections 3, the refrigerant-and-heating-medium paths 4 and the like which are provided on the fuel chamber side.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a molten salt fuel cell, and in particular, in order to equalize the temperature of the cell body and control the operating temperature, flow paths for supplying and discharging coolant and hot medium are arranged in the cell frame. Regarding the laminated structure.

The object of the present invention is to provide a flow path for supplying and discharging a coolant or a hot medium in the battery frame of a stacked battery, and to
The present invention provides a molten salt fuel cell characterized by equalizing the temperature distribution during operation and making it possible to control the operating temperature.

The operating temperature of the molten salt fuel cell is 650-700C. To maintain this operating temperature, depending on the scale of the fuel cell, there are two methods: ■ Heating is done by an external power source; ■ It is possible to generate electrochemical reactions by introducing the fuel and oxidizing agent for the reaction, and the self-heating generated at this time. be. Normally, in a fuel cell with a large stacked structure, the temperature is maintained by self-heating of the latter, and it is rather necessary to cool the cell body. In either case, temperature distribution often occurs depending on the scale of the stacked battery. Therefore, in order to operate the fuel cell safely and efficiently, it is necessary to appropriately control the operating temperature of the fuel cell main body and to equalize the temperature.

In the present invention, a flow path for supplying and discharging a hot medium or a coolant that can handle either external heating or cooling due to self-heating is arranged in the cell frame constituting the fuel cell, and the nine characteristics are t%. .

Embodiments of the present invention will be described in detail below with reference to the drawings.

Embodiment 1 FIG. 1 shows a battery frame 1 according to the present invention, with a fuel chamber 2 in the center,
The current collecting protrusion 3 and the current collecting protrusion S form a coolant/hot medium passage 4 which is hollow and extends from the coolant/hot medium inlet 5 to the coolant/hot medium outlet 6 to form a cold/hot medium flow path 7 . Battery frame periphery 81C
is provided with a fuel inlet side passage 9 communicating with the fuel chamber 2 and a fuel outlet side passage 1o, and an oxidizing agent inlet side passage 11 and an oxidizing agent outlet side passage 12 communicating with the oxidizing agent chamber provided on the back side of the battery frame 1. is provided.

FIG. 2 shows a state in which FIG. 1 is turned over. As in FIG.
, there is an oxidizer chamber-side refrigerant/hot medium passage 15, and a refrigerant/hot medium flow path 7 is formed which communicates from an oxidizer chamber-side refrigerant/hot medium inlet 16 to an oxidizer chamber-side refrigerant/hot medium outlet 17. These are disposed perpendicularly to the current collector protrusion 3, coolant passage 4, etc. provided on the fuel chamber side.

FIG. 3 shows a cross section of the central part of FIG. 2, with the oxidizer chamber 13 on the upper side and the fuel chamber 2 on the lower side.

The oxidizer chamber side passage 15 and the gas separation plate 18 are of course electrically conductive, but are hermetically sealed and integrated so that the coolant/hot medium channel 7 does not communicate with the oxidizer chamber.

The fuel chamber side is constructed in a similar manner.

Figure 4 shows an example in which a circular electrically conductive material such as a stainless steel pipe is used, whereas Figure 3 has a rectangular shape to form a coolant/hot medium flow path. It is easier to process than.

In this embodiment, an example is shown in which the fuel chamber 2 or the oxidizer chamber 13 is provided with three coolant and hot medium flow paths, but it is possible to further increase the number of coolant flow paths or change the arrangement if necessary. is also possible. The inside of the vibrator may also be a material with corrugations or irregularities (for example, ThermoExcel) to facilitate heat exchange.

Example 2 In the battery frame 1 of Example 1, two battery frames were used,
One of them is on the fuel chamber side, and the other is on the oxidizer chamber side.
As shown in the figure, a battery frame 19 with a cold/hot medium flow path is provided, and the sixth
As shown in the figure, in the process of stacking the battery frames 1 of Example 1 by stacking them and bonding them to have electrical conductivity,
20t of cold and hot medium passage holes are formed arbitrarily, such as at intervals of several tens.

As described above, according to the laminated structure of the present invention, it is possible not only to heat the battery from the outside at the start of operation, but also to supply a heating medium to the inside of the battery body. The thermal strain caused is significantly reduced. Furthermore, during operation, the temperature can be controlled by passing a coolant so that the battery does not overheat due to the heat generated by the electrochemical reaction, making it possible to operate the battery safely. Furthermore, if temperature control can be performed using a refrigerant/heating medium, the start-up time at the start of operation can be shortened, and in the event of an abnormality, the temperature can be lowered in a short period of time, which will become more effective as batteries become larger.

[Brief explanation of the drawing]

1 and 2 are plan views of a battery frame according to an embodiment of the present invention, FIG. 3 is a side sectional view near the center of FIG. 2, and FIG.
5 is a side sectional view of a battery frame according to another embodiment of the present invention, FIG. 5 is a perspective view of a battery frame according to another embodiment of the present invention, and FIG.
The figure is a sectional view of a battery frame according to another embodiment of the present invention. 1...Battery frame, 2...Fuel chamber, 4...Cooling/heating medium passage, 1322 diagram/A/7 MJ diagram

Claims (1)

[Claims] 1. A fuel chamber and an oxidizing agent chamber are provided on both sides with a gas separation plate interposed therebetween, and a passage for supplying and discharging fuel and oxidizing agent is provided at the periphery, and the fuel chamber and In a fuel cell having a Marugameike frame structure that enables direct current collection from the negative and positive electrodes disposed in the oxidizer chamber, at least a part of the current collecting protrusion of the cell frame is hollow; A molten salt fuel cell in which a flow path for a coolant or a hot medium is formed in a hollow portion to provide a t-% characteristic. 2. A molten salt fuel according to claim 1, characterized in that a battery frame is provided for each stack of a plurality of unit cells to hold a flow path for a coolant or a hot medium. battery. 3. In claim 1, either the fuel chamber t or the oxidizer chamber is disposed on one side with a gas separation plate interposed therebetween, and the other side is provided with a flow path for a refrigerant or a hot medium. A molten battery made by intermittently stacking battery frames in which nine basic structural units are provided with notched portions, and the notched portions of the basic structural units face each other to form flow paths for the coolant or hot medium. Salt fuel cell.