JPH03105873A - fuel cell storage container - Google Patents

Abstract

PURPOSE:To connect numerous conductors to one terminal and also retain a good insulating property of a fuel cell storage container by filling the current terminal and voltage terminal of the fuel cell storage container with insulating material having good heat conductivity, and cooling the filling material by means of a cooling jacket. CONSTITUTION:A lead 14 serving as an electricity transmitting portion is passed through the center of a terminal box 2 and the lead 14 is supported by the terminal box 2 while in an insulated state by an insulator 15 from the terminal box 2. The terminal box 2 and the insulator 15, and the insulator 15 and the lead 14 have sealing property by which they can withstand the inner pressure of a storage container. Insulating material having good heat conductivity is packed around the lead 14 in the storage container 2 while under good gas permeability, and a cooling jacket 17 is installed around the insulating material. Thus a fuel cell storage container is obtained which has a compact current terminal having good insulating performance against current cables through which big current flows and which further has a compact voltage terminal having good cooling performance from which several voltage cables can be taken out all together.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cooling device for current terminals and voltage terminals of a fuel cell container. [Prior Art] Generally, in storage containers for storing electrical equipment, bushing type terminals and lead wire connection devices are used to extract generated electricity to the outside. A conventional example of this terminal is described in Japanese Patent Application Laid-Open No. 55-103057. Its structure is shown in FIGS. 3 and 4. A terminal box 2 is attached to the outer wall 1 of the storage container. This terminal box 2 has a hollow terminal 3 with a bottom and an insulator 7 provided on the outer periphery of the main part.
It is attached so that a part is located inside the terminal box 2 (3a) and a part is located outside the terminal box 2 (3b) via the terminal box 2. A lead wire 4 for connecting to an electrical device in the storage container is connected to the terminal 3a in the terminal box 2 via a connecting tube 6.
An external lead wire 5 is connected to the terminal 3b outside the terminal box 2. The electrical equipment connection lead wire 4 and the external lead wire 5 are connected by the terminal 3 in this way. The structure for cooling this terminal 3 is shown in Figure 4. The electrical equipment connection lead wire 4 is connected to the terminal box 2 via the connection pipe 6 as described above.
It is connected to the inner terminal 10. The terminal 10 is a hollow cylindrical lead 8
It is connected to the terminal 11 outside the terminal box 2 via the terminal box 2. The external connection lead wire 5 is connected to this terminal l1. A ventilation pipe 9 is installed in the hollow part of the hollow cylindrical reed 8. The ventilation pipe 9 connects the insulator 1 to the outside of the terminal box 2.
It is connected via 2. A cooling medium such as hydrogen gas is supplied from the outside of the terminal box 2 into the ventilation pipe 9, and as shown in FIG.
It flows as shown by the arrow in FIG. That is, the cooling medium that has passed through the ventilation pipe 9 flows from the bottom of the hollow cylindrical lead 8.
After passing through the inner wall of the hollow cylindrical lead 8 and cooling the hollow cylindrical lead 8, etc., it passes through the connecting pipe 6 and is discharged to the outside of the terminal box 2. The connecting pipe 6 is connected to the outside of the terminal box 2 via an insulator 13. [Problem W to be solved by the invention] In the above conventional example, there are four parts that must be sealed to separate the inside and outside of the storage container.
There are several places. That is, the connection part between the storage container outer wall 1 and the terminal box 2, the connection part between the terminal box 2 and the terminal 3, the connection part between the terminal box 2 and the insulator 2, and the connection part between the terminal box 2 and the insulator 13. There are several places. In cases where the inside of the container is subject to high temperature and high pressure, such as a fuel cell storage container, it is possible that the above-mentioned connections will be destroyed due to the effects of both heat and pressure and the sealing performance will be lost, so it is necessary to reduce the number of connections as much as possible. .

In addition, when the above conventional example is used as a current cable terminal for a fuel cell storage container, the cross-sectional dimension of the hollow cylindrical lead of the current-carrying part inside the terminal becomes large due to the large amount of current, which increases the size of the terminal itself. There is a problem in that the connection area between the terminal box and the terminal box and the connection area between the terminal box and the outer wall of the storage container are enlarged, which affects the sealing performance against the internal pressure of the container.

Furthermore, when using the above conventional example as a voltage cable terminal for a fuel cell storage container, the number of voltage cables is large (sometimes tens of cables), so as many terminals as the number of voltage cables are needed in the storage container. Installing them is a big financial burden, and in some cases there may be too many to install. Therefore, a terminal with a structure that allows multiple voltage cables to be taken out and cooled is required. The present invention has been made in view of the above points, and therefore, its purpose is to provide a current terminal that has a small number of connection parts, is compact and has good insulation performance for a current cable that carries a large current, and furthermore, The object of the present invention is to provide a fuel cell storage container having a voltage terminal that is compact and has good cooling performance from which several voltage cables can be taken out at once. [Means for solving the problem] In order to achieve the above object, the leads of the terminal part are not hollow but are densely packed, and an insulating material with good thermal conductivity is placed around the leads to have gas permeability. A cooling jacket is provided around it, and an inert gas supply port for purging the inside of the fuel cell storage container is installed on the opposite side of the filling material and the cooling jacket from the storage container side. The structure is to be installed at the location of [Function] Particles made of an insulating material with good thermal conductivity have the function of electrically insulating between the current-carrying lead and the storage container, and the function of transmitting the heat of the lead to the cooling jacket by thermal conduction. The cooling jacket has the effect of removing heat from the reeds as described above. Since this cooling jacket is electrically insulated from the leads and independent from the storage container itself, the cooling medium is supplied to and discharged from the cooling jacket at the supply pipe connection. There is no need to provide electrical insulation or pressure resistance against the internal pressure of the storage container. In addition, since the inert gas supplied into the storage container is supplied to the storage container after passing through the filling made of an insulating material with good thermal conductivity, the filling is cooled by the cooling jacket and condensation occurs. It has the effect of preventing insulation from being impaired.

〔Example〕

The present invention will be explained below based on the illustrated embodiments. An example of this is shown in FIG. Fuel cell storage container outer wall 1
A terminal box 2 is connected to the terminal box 2. A lead 14, which is a current-carrying part, is connected to the center of the terminal box 2, and the lead 14 is insulated from the terminal box 2 by an insulator l5.
It is supported by The terminal box 2, the insulator 15, and the insulator 15 and the lead 14 have sealing properties that can withstand the internal pressure of the storage container. The area around the lead 14 in the storage container 2 is filled with an insulating material having good thermal conductivity and good gas permeability. A cooling jacket 17 is installed around it. Additionally, fuel cells require the surrounding atmosphere to be filled with an inert gas such as nitrogen gas, so the inside of the fuel cell storage container must be purged with inert gas. Since water vapor is generated and may leak into the atmosphere, even if the inside of the storage container is purged with inert gas, there is ample chance that the leaked water vapor will come into contact with the filling material 16 and condense. could be. It can be said that when such a phenomenon occurs, the insulation performance of the filler 16 may deteriorate or even disappear. Therefore, it is necessary to prevent this condensation, and for this purpose, the inert gas supply port 18 for supplying into the storage container is provided at a position opposite to the storage container with respect to the filling 16 in the terminal box 2. ．． With this structure, since the inert gas is supplied into the storage container after passing through the filling 16, it is possible to prevent the filling 16 from condensing. FIG. 2 shows another embodiment of the present invention.
This figure shows a number of thin leads 19 attached to one terminal as a current-carrying part. As is clear from this figure, a number of leads 19 can be connected to one terminal without impairing the functionality of the embodiment shown in FIG. [Effects of the Invention] According to the present invention, current terminals and voltage terminals of a fuel cell storage container are filled with an insulating material having good thermal conductivity, and the filling material is cooled by a cooling jacket, thereby making it possible to conduct electricity. This has the effect of improving sealing performance because it reduces the amount of insulation between the parts and the other parts. Furthermore, by adopting the above structure, many leads, which are current-carrying parts, can be attached to one terminal, so many conductive wires can be connected to one terminal. Furthermore, the above-mentioned insulator with good thermal conductivity is filled so that it has gas permeability, and the inert gas used to purge the inside of the fuel cell storage container passes through the filling and then the fuel cell storage container is filled. By adopting a structure in which the fuel is supplied inside the fuel cell, it is possible to prevent the filling material from condensing due to water vapor leaking from the fuel cell body, thereby maintaining insulation properties.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of a terminal portion according to an embodiment of the present invention, FIG. 2 is a vertical cross-sectional view of a terminal portion according to another embodiment of the present invention, FIG. 3 is a vertical cross-sectional view of a conventional example, and FIG. The figure is a structural diagram showing the third @ terminal cooling structure. DESCRIPTION OF SYMBOLS 1... Outer wall of storage container, 2... Terminal box, 14... Current-carrying lead, 15... Insulator, 16... Insulating filling with good thermal conductivity, 17... Cooling jacket for,
18...Inert gas supply port.

Claims (1)

[Scope of Claims] 1. In a fuel cell storage container equipped with a fuel cell, a terminal for taking out a current cable and a voltage cable from the fuel cell, and a cooling mechanism for cooling the terminal, A fuel cell storage container characterized by being filled with an insulator having good thermal conductivity and provided with a cooling jacket for cooling the filling. 2. In the fuel cell storage container according to claim 1, the current terminal and the voltage terminal are filled with an insulating material having good thermal conductivity so as to have gas permeability. A current terminal and a voltage terminal are provided with a supply port for the inert gas at a position such that the inert gas to be supplied into the storage container can be supplied into the fuel cell storage container after passing through the filler. Fuel cell storage container.