JPH0324028B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to improvements in thermal batteries. [Prior art] A thermal battery is a battery that uses molten salt as an electrolyte.At room temperature, the electrolyte is a non-conductive solid salt, so it is inactive as a battery, but when heated to a high temperature, the electrolyte becomes ionically conductive. It becomes a molten salt with good properties, becomes active as a battery, and becomes capable of supplying power to the outside. Usually, a thermal battery has a built-in exothermic agent that heats the electrolyte and an ignition device that generates heat from the exothermic agent, and electric power can be extracted by activating the ignition device as needed. Such thermal batteries are: (1) capable of long-term storage with virtually no performance deterioration; (2) capable of instantly activating the battery; and (3) capable of high-output discharge. (4) It can be used in a wide temperature range, and (5) It is resistant to vibrations and shocks. It is used as an emergency power source. By the way, a conventional thermal battery of this type has a structure as shown in FIG. A battery case 1 containing a unit cell, a heat generating agent, an ignition device, etc. is sealed by welding a battery cover 2, and an output terminal 3 and an ignition terminal 4 are provided on the battery cover 2. . Further, the output terminal 3 and the ignition terminal 4 are each insulated from the battery cover 2 by an insulating glass 5. Further, an electric wire 6 is connected to the output terminal 3, and an electric wire 7 is connected to the ignition terminal 4 by soldering. To activate such a conventional thermal battery, it is sufficient to apply a necessary current to the electric wire 7, and then the ignition device inside the battery is activated through the ignition terminal 4, thereby activating the battery. Electric power is supplied to the outside through an electric wire 6 through an output terminal 3. [Problems to be Solved by the Invention] However, in such conventional thermal batteries, protection of the connection between the electric wire 6 and the output terminal 3 or the connection between the electric wire 7 and the ignition terminal 4 is not considered. Because of this, wires 6 or 7 were damaged during handling.
Accidents have occurred infrequently, such as when the wire is cut or the solder comes off at the connection between the wire and the terminal, such as the connection between the wire 6 and the output terminal 3. Furthermore, during discharge under vibration or high temperature, the solder at the connection between the electric wire 6 and the output terminal 3 melts and the electric wire 6 comes off, resulting in cases where power cannot be supplied to the outside. Ta. [Means for Solving the Problems] The present invention provides a thermal battery that solves the above-mentioned problems, and for this purpose, the present invention provides a battery cover including terminals of the thermal battery and electric wires connected to these terminals. After coating the surface with insulating paint,
An electric wire connected to a terminal is fixed to a battery cover with a thermosetting adhesive [Example] The thermal battery of the present invention will be described below with reference to the drawings. Figures 1 and 2 show an embodiment of the thermal battery of the present invention, in which a battery case 1 containing a unit cell, a heat generating agent, an ignition device, etc. is hermetically sealed by welding a battery cover 2. Furthermore, an output terminal 3 and an ignition terminal 4 are provided on the battery cover 2. Further, the output terminal 3 and the ignition terminal 4 are each insulated from the battery cover 2 by an insulating glass 5. Further, an electric wire 6 is connected to the output terminal 3, and an electric wire 7 is connected to the ignition terminal 4 by soldering.
In addition, the output terminal 3, the ignition terminal 4 and the electric wire 6,
The surface of the battery cover 2 including 7 is coated with an insulating paint 8, as shown in FIG. It is fixed with adhesive 9. Therefore, in this embodiment, the electric wire 6 and the output terminal 3
Further, the electric wire 7 and the ignition terminal 4 did not come off during handling, and there was no accident in which the electric wire came off from the terminal at the connection between the electric wire 6 and the output terminal 3 during battery discharge. Note that even if the electric wires 6 and 7 are fixed on the battery cover 2 as described above, problems such as leakage do not occur because the electric wires 6 and 7 and the surface of the battery cover 2 are coated with an insulating paint. The following table shows the frequency of accidents caused by disconnection of electric wires as described above for the conventional thermal battery and the thermal battery of the present invention.

[Table] As is clear from the table above, with the conventional product, wires were broken at a rate of 3 out of 100, while with the product of the present invention, wires were broken during handling.
Out of 1000, not one occurred. In addition, regarding wire disconnection during discharge, the conventional product has 90
While this occurred at a rate of 10, not one out of 500 occurred in the product of the present invention. [Effects of the Invention] As described above, according to the present invention, accidents such as wires being cut during handling and wires coming off due to solder melting during discharge can be completely eliminated, and the reliability of thermal batteries is greatly improved. It can also be improved significantly.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the thermal battery of the present invention, Fig. 2 is an enlarged longitudinal cross-sectional view of the main part of the embodiment of the invention shown in Fig. 1, and Fig. 3 is an example of a conventional thermal battery. FIG. 2... Battery cover, 3... Output terminal, 4...
Ignition terminal, 6, 7... Electric wire, 8... Insulating paint,
9...Adhesive.

Claims (1)

[Scope of Claims] 1. A thermal battery having an insulating paint 8, the insulating paint 8 covering terminals 3, 4, battery end faces having the terminals 3, 4, and electric wires 6 connected to the terminals 3, 4. , 7, and the electric wires 6, 7 are fixed to the battery end face with an adhesive 9.