JP3456105B2 - Thermal battery - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal battery, and more particularly to a structure of an output lead part.

[0002]

2. Description of the Related Art Thermal batteries are inactive at room temperature, but become active when heated to a high temperature to supply electric power to the outside, and are a type of storage battery.

Therefore, the shelf life is extremely good, and
It can be used after storage for 10 years without any change in battery performance immediately after manufacture. Further, since it is operated at a high temperature, the electrode reaction is likely to proceed and has a high output characteristic, so that it is used as a power source for defense equipment such as various flying objects and induction equipment and an emergency power source.

The structure of the output lead portion of the conventional thermal battery will be described below with reference to FIG. In FIG. 4, a plurality of unit cells 1 and heating agents 2 are alternately laminated to form an electromotive section laminate. The positive and negative electrodes of the electromotive section laminate are electrically connected to the hermetically sealed output terminal 13 of the outer cover 11 via the collector plate 3 with the output lead plate.

The upper temperature control body 4, the lower temperature control body 5, and the ignition pad 6 are laminated at respective positions, and the side peripheral surface of the insulator 7 is formed so that the fire zone 8 formed by extraction molding is located inside. And is surrounded by a heat insulating layer 9.

A spark plug 10 is provided above the ignition pad 6 and is electrically connected to a hermetically sealed input terminal 14 of an outer cover 11. The outer lid 11 and the outer case 1
2 has a welded and sealed structure.

To activate the battery, an ignition current is passed from the outside of the battery to the hermetically sealed input terminal 14, the ignition plug 10 is ignited, the ignition pad 6 is burned, and the squib 8 is discharged.
Each heating agent 2 is burnt through the. Each unit cell 1 is heated and the unit cell reacts to generate electromotive force, passes through the current collector plate 3 with an output lead plate, and supplies power from the hermetically sealed output terminal 13. Upper temperature controller 4, lower temperature controller 5
This function is provided for the purpose of suppressing rapid heating immediately after battery operation and maintaining heat to reduce cooling during battery operation.

The electromotive section is laminated and assembled by laminating the lower temperature control body 5, the heating agent 2, the current collector plate 3 with an output lead plate, and the unit cell 1 on a laminating jig. After stacking a plurality of batteries 1, a collector plate 3 with an output lead plate, a heating agent 2, an upper temperature control body 4, and an ignition pad 6 are stacked, and then the stacking portion is pressurized with a constant pressure. The purpose of this pressurization is to stabilize the dimensions of the electromotive section laminate and to bring the unit cell and heating agent into close contact with each other to stabilize heat conduction and the reaction of the electromotive section.

After pressurizing, the position of each current collector plate 3 with output lead plate and the distance between the two are measured with a caliper or the like, and each output lead plate extraction opening is formed on the insulator 7 with a blade or scissors. Holes are preliminarily formed in a shape substantially the same as the cross-sectional shape of the output lead plate so that there is no deviation.

Next, one output lead plate is passed through the opening in advance and the insulator 7 is wound around the side peripheral surface of the electromotive section laminate, while the other output lead plate is inserted into the corresponding opening on the insulator 7. Through this, the insulator 7 is wound and assembled on the entire side surface of the electromotive section laminate. (For example, JP-A-62-139
(270 publication)

[0011]

However, in the above-mentioned conventional structure of the insulator, the thickness of the unit cell and the heating agent is increased when the output lead plate is taken out at a plurality of locations or when the number of unit cells is laminated. Due to this variation, the deviation in the height direction always causes a dimensional difference of several mm or more, and it is extremely difficult to accurately calculate the position and distance of each output lead plate by desk calculation. Since the position of the current collector plate with output lead plate of the subsequent electromotive section laminate is dimensionally measured according to the actual product, and the position of the corresponding opening of the output lead plate for taking out is determined, so much time is spent. However, since the flow of the assembling process is stopped, the productivity is very poor and the cost of the thermal battery is high.

In order to solve the above problem, therefore, as shown in FIG. 5, the insulator 7 is preliminarily provided with a rectangular hole 15 larger than the cross-sectional shape of the output lead plate 3 '. Output lead plate 3'while wrapping around the starter stack
There is also a method of extracting the heat to the outside through the rectangular hole 15, but in this method, the combustion heat of the heating agent 2 is directly transmitted to the output lead plate 3 ′ through the rectangular hole 15 and the output lead plate 3 ′. Is thermally impaired, its mechanical strength is reduced, it may be damaged by vibration or shock, and power may not be supplied, which is not practical.

The present invention solves the above-mentioned problems of the prior art by facilitating the winding of the insulator around the electromotive section laminate, shortening the working time thereof, and improving the productivity without impairing the reliability of the battery. It is an object of the present invention to provide a low-cost thermal battery and an improved battery.

[0014]

In order to solve this object, a thermal battery of the present invention has a window part which can be opened and closed in an insulator, and an opening for taking out an output lead part in the window part. The portion is provided in a shape substantially the same as the cross-sectional shape of the output lead portion.

Furthermore, the thermal battery of another invention has a window part which can be opened and closed in both sides of the insulator, and an opening part for taking out the output lead part is formed so as to straddle both opening parts of the window part, The opening is provided in a shape that is substantially the same as the cross-sectional shape of the output lead portion.

Further, the thermal battery of another invention has an opening window portion in the insulator and a lid portion for closing the opening window portion, and the opening portion for taking out the output lead portion is provided in the lid portion as the output lead portion. The cross-sectional shape is approximately the same.

According to these configurations, the openable / closable window portion or the opening window portion provided in the insulator may be set in advance at an approximate position for taking out the output lead portion. The positioning and processing of the output lead take-out opening, which had been done by individually finding the position of the collector plate with output lead plate of the electromotive section laminate, was simplified, and each output lead was taken out. The output lead part can be easily protected from combustion heat by closing the window part or closing the opening window part with a lid. It is possible to provide a thermal battery with improved productivity and low cost without facilitating the reliability of the battery by facilitating the winding of the insulator and shortening the working time.

[0018]

DETAILED DESCRIPTION OF THE INVENTION

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

In FIG. 1 (a), 7 is an insulator, which is a window portion 16 which can be opened and closed in a single opening in advance at an approximate position of a takeout portion of a plate-shaped output lead portion (hereinafter referred to as an output lead plate) 3 '. Is provided. When the insulator 7 is wound around the electromotive force laminated body, the output lead plate 3 ′ is taken out from the window part 16 while being wound with the window part 16 being opened to the outside, and the output lead plate 3 ′ is horizontal with the output lead plate 3 ′. Along the same position in the direction, the window 16 is provided with an opening 17 having substantially the same cross-sectional shape as the output lead plate 3 ′, and the output lead plate 3 ′ is inserted into the opening 17 while closing the window 16. It has been configured.

FIG. 1A is a schematic view showing the state at that time, and the insulator 7 is preferably made of a material having a heat insulating property.
In this embodiment, a ceramic fiber molded into a sheet having a thickness of 1 mm is used, and the output lead plate 3'is made of iron plated with nickel to have a thickness of 0.1 mm.

The output lead plate 3'has a thickness of 0.1 to
As long as the flakes have a thickness of about 0.5 mm, the influence of combustion heat diffusion from the openings is small. Therefore, as shown in FIG. 1B, the horizontal length of the openings 17 is equal to the output lead plate 3 '. May be longer than the cross-sectional length of.

(Embodiment 2) A second embodiment of the present invention will be described below with reference to the drawings.

In FIG. 2, reference numeral 7 denotes an insulator, and a window portion 16 that can be opened and closed is provided in advance at an approximate position of the takeout portion of the output lead plate 3 ′ so as to straddle both opening portions of the window portion 16. The configuration is the same as that of the first embodiment except that an opening 17 for taking out the output lead plate 3'is provided in the.

(Third Embodiment) A third embodiment of the present invention will be described below with reference to the drawings.

In FIG. 3 (a), 7 is an insulator, and an opening window portion 16 is provided at an approximate position of the extraction portion of the output lead plate 3 '. After taking out the output lead plate 3'from the opening window 16 while winding the insulator 7 around the electromotive section laminate, an opening 17 having substantially the same cross-sectional shape as the output lead plate 3'is provided in advance. The output lead plate 3 ′ is inserted into the opening 17 of the lid 18 that is open to close the opening window 16.

The lid 18 may be made of the material cut out for the opening window provided in the insulator 7.

Further, the output lead plate 3'has a thickness of 0.1 to 10.
As long as it is a thin piece having a thickness of about 0.5 mm, the horizontal length of the opening 17 may be longer than the cross-sectional length of the output lead plate 3'as shown in FIG. .

The lid 18 may be formed to be larger than the opening window 16 and may be installed inside or outside the insulator 7 to close the opening window 16. The lid 18 may be made of a ceramic fiber sheet. In addition to the above materials, natural mica may be used.

With the configuration of the present invention as described above, it is only necessary to preset the window portion as the takeout hole of the output lead plate at an approximate position, and each output lead plate can be easily taken out from the window portion. The output lead plate can be protected from the heat of combustion by closing the window portion or closing the opening window portion with a lid.

[0030]

As described above, the structure of the present invention facilitates the winding of the heat insulating insulator around the electromotive section laminate, shortens the working time, and does not impair the reliability of the battery. It is possible to provide a thermal battery with improved productivity and low cost.

[Brief description of drawings]

FIG. 1A is a schematic view showing the vicinity of an output lead portion of a thermal battery according to a first embodiment of the present invention, and FIG. 1B is a schematic view showing the vicinity of an output lead portion of another specification of a thermal battery according to the first embodiment of the present invention. Schematic showing

FIG. 2 is a schematic view showing the vicinity of an output lead portion of a thermal battery according to a second embodiment of the present invention.

FIG. 3 (a) is a schematic view showing the vicinity of the output lead portion of the thermal battery in the third embodiment of the present invention, and (b) shows the vicinity of the output lead portion of another specification of the thermal battery in the third embodiment of the present invention. Schematic showing

FIG. 4 is a cross-sectional view of a conventional thermal battery

FIG. 5 is a schematic diagram showing the vicinity of an output lead portion of a thermal battery in a conventional comparative example.

[Explanation of symbols]

1 unit cell 2 heating agent 3 Current collector with output lead plate 3'output lead plate 4 Upper temperature controller 5 Lower temperature controller 6 ignition pad 7 insulator 8 fire zones 9 Thermal insulation layer 10 Spark plug 11 Exterior lid 12 exterior case 13 Hermetically sealed output terminal 14 Hermetically sealed input terminals 15 Hole 16 windows 17 openings 18 Lid

Front Page Continuation (72) Inventor Kazuya Omichi 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Tomoya Watanabe, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. 72) Inventor Kazuhiro Kimura 1006, Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) Reference JP-A-58-150274 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H01M 6/36 H01M 2/30

Claims (3)

(57) [Claims] 1. A thermal battery comprising an insulator on at least a side peripheral surface of an electromotive section laminate in which a plurality of unit cells and a heating agent are laminated, wherein the insulator is a window that can be opened / closed in a single opening. Has a section,
A thermal battery in which an opening for taking out the output lead portion is provided in the window portion in a shape substantially the same as the cross-sectional shape of the output lead portion. 2. A thermal battery comprising an insulator on at least a side peripheral surface of an electromotive section laminate in which a plurality of unit cells and a heating agent are laminated, and a window portion which can be opened and closed in both sides of the insulator. Have
A thermal battery in which an opening for taking out the output lead portion is formed so as to straddle both opening portions of the window portion, and the opening portion is provided in a shape substantially the same as the cross-sectional shape of the output lead portion. 3. A thermal battery comprising an insulator on at least a side peripheral surface of an electromotive section laminate in which a plurality of unit cells and a heating agent are laminated, wherein the insulator has an opening window portion and the opening window thereof. A thermal battery comprising a lid portion for closing the portion, and an opening for taking out the output lead portion is provided in the lid portion in a shape substantially the same as the cross-sectional shape of the output lead portion.