JPS6072171A - Thermal battery - Google Patents

Abstract

PURPOSE:To provide an activation device of thermal battery which activates the battery with an electrical or shock type ignition device by fixing a firing pin to outer terminals of an electrical ignition device and arranging a safety device which is electrically connected through a shear pin which disconnects it if necessary. CONSTITUTION:A shear pin 9 is cut when 140G or more of shock is applied, and a firing pin 8 naturally falls within a holder 13 and striks a shock type ignition type device to ignite. A flame ignites heating agent 1 in each layer through a fire conducting hole to activate a battery. When such shock is not available, a shock bar is inserted into a shock bar hole 12 and struk with a hammer. The firing pin 8 cuts the shear pin 9 and the shock type ignition device is operated. When an electrical ignition device is used, a finger is inserted into a pulling out ring 10 and the shear pin 9 is pulled out and a conductive lead 11 is disconnected, then outer power source is connected to ignition device outer terminals 6' and 6'', and current of 300mA is introduced for 10ms. An electrical ignition device is ignited and exposed part of heating agent is burned at first, then the battery is activated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to thermal batteries, and more particularly to a starting igniter for starting and activating thermal batteries.

Conventional structure and problems Thermal batteries usually use molten salt with a melting point of 350'C or higher as an electrolyte, so they are inactive at room temperature and do not supply any electricity at all, even after long-term storage. It exhibits the same characteristics as a new battery. Taking advantage of this advantage, it is mainly used as an emergency power source. In terms of application, it must satisfy the requirements that it operates reliably and supplies power during use, and that it is easy to use.

However, in addition to the power generation section, membrane-type thermal batteries often have a built-in heating agent that heats and melts the molten salt electrolyte, and an igniter that ignites the heating agent. . Specifically, the power generation section uses calcium for the negative electrode and a eutectic salt of potassium chloride and lithium chloride (melting point 362°) for the electrolyte.
C), calcium chromate is used for the positive electrode active material '7f, and 2y'/ful is used for the current collector plate.On the other hand, the heating agent is one that utilizes thermite reaction using a mixture of metal powder and oxidizing agent, and the combination Various types are considered depending on the application and required performance, but the representative one is zirconium-
These include lead chromate-potassium permanganate heating agents and iron-potassium perchlorate heating agents.

Three to six types of igniters have already been proposed, but
Representative examples include the following.

(1) Electric igniter This creates an electric bridge made of platinum filament between a pair of electrode terminals, wraps it with an igniting agent such as lead azide, and when electricity is passed through it, the filament becomes red-hot and ignites. An igniter that emits a flame.

(2) Impact type igniter Unlike electric type igniters, which require an external power source, this type of igniter uses an igniter between the camp and the ignition metal to ignite a flame when hit.

(3) Spontaneous ignition type igniter This type of igniter utilizes the ignition point specific to a substance, and uses a mixed gas of ether and oxygen. This is used in fire alarms, etc.

Among these, (1) is used the most, followed by (2) and (3).

The reason for this is that the electric type can be made smaller, has relatively high ignition reliability, and allows for a much more sophisticated design than the impact type. The impact type requires a band device to apply an impact to the igniter, and for example, as in U.S. Patent No. 3,679,487, the tip is actuated by a spring, or the tip is actuated by acceleration. There is a method, but it has the disadvantage of requiring a considerable amount of space for it. Since spontaneous ignition type batteries have limited use, it is no exaggeration to say that most thermal batteries are electric type or impact type.

However, the electric type also has a few drawbacks.
The first is that, as mentioned above, the electric bridge uses ultra-fine platinum filaments, which have the property of igniting at a few -mA to several hundred mA, so leakage current or static electricity, for example, can ignite the bridge. If it flows between the terminals, it may easily become activated. Second, it cannot be used in places without an external power source. Thirdly, although the reliability is high, if the device does not operate properly in the intended use, human life may be affected, and countermeasures are required.

On the other hand, impact type lighters are used as a means of fixing the pencil lead.
Usually, the safety bottle is removed when necessary, as in U.S. Patent No. 3679aB7, or by pushing out a spring smaller than the lead, as in Japanese Patent Publication No. 46-17326 and Japanese Patent Publication No. 52-24973. , measures have been taken to allow the pencil lead to fall. However, the reliability of both the method of pulling out the safety pin and the method of pushing out the spring was still in its infancy.

Purpose of the Invention The present invention relates to a starting device that operates in both electric and impact types, and provides a highly reliable thermal battery that can prevent accidental activation of an electric igniter and activate the battery even in the event of an inoperation. The purpose is to provide

Structure of the Invention The present invention includes an electric igniter and an impact igniter, and provides electrical continuity through a shear pin that fixes a pencil lead to an external terminal of the electric igniter and cuts it when necessary. It has a safety device in the state, and when activated, it is electrically operated,
Both impact type igniters have a mechanism that can activate the battery.

The explanatory diagram of the embodiment shows a longitudinal sectional view showing a typical embodiment of the present invention.

Reference numeral 1 denotes a unit cell consisting of the above-mentioned battery system, and in this example, 8 cells are connected in series and designed to generate a voltage of 20 V and 17 J. 2 is a heating agent, which is made of the heating agent system mentioned above, is formed into a sheet and is stacked alternately with unit cells 1, and is used to heat the unit cell to a temperature higher than the melting point of the electrolyte used in the unit cell. Use materials that ignite and are highly safe to handle. 3 is a heat storage layer, which is provided at both ends of the stack of unit cells 1 and heating agent 2 to store the generated heat, suppress cooling, and extend the operating time of the battery.0 4 is an electric ignition. The device has the property of emitting a flame when a pulse current of about 10m5 is passed with a current of 300mA, and the pair of electrodes 5' and 6'' have the property of igniting when energy equivalent to the external terminals 6' and 6'' is applied. For example, if the lead 8 is 6g and the drop height is 30, then 2m-g-h=m'
- When calculated by substituting g' and h', it is found that ignition occurs when 140G is applied. 9 is a shear pin, 140G
It is necessary to select materials and wire diameters that are safe for cutting safely under the impact of 30G during normal handling and transportation. Reference numeral 10 denotes a pull-out ring for the shear bottle, which can be removed by inserting a finger into the pull-out ring when, for example, only the electric type must be used, or when the shear pin is not necessary. 11 are external terminals for igniter 6', 6'', Sharpie/9, and pull-out ring 10
A lead wire for electrical continuity with the electric igniter 4.
Its role is to prevent accidental electricity from flowing into the device and causing a fire. 12 is a hole for an impact rod used when no acceleration is applied to the pencil lead 8; 13 is a holder;
It is united as one.

Reference numeral 16 denotes an outer case, and 17 a heat insulating material layer, which serves to keep the integrated layer of the cell and heating agent warm, and also houses an electric igniter. 18' and 18'' are a pair of output terminals. 1
Numeral 9 is a large groove hole through which the flame emitted from the igniter does not pass, and the heating agent 2 exposed to the large groove hole is ignited all at once by the flame, so that the heating agent in each layer is burned at the same time. 20 is a heating agent exposed portion that receives the flame emitted from the electric igniter.

In the above configuration, the activation procedure of this thermal battery can be described as follows: (a), (b), ((), and any combination thereof.

(a) In the case of impact operation with an accelerated helmet, if the impact value is 14oG or more, the shear pinot 9 will be cut off, and the lead 8 will become a free-falling body and slide inside the holder 13, hitting the impact type igniter 7 and igniting it. Then, the flame passes through the large groove holes 19 and ignites the heating agent 1 in each layer, thereby activating the entire battery.

(b) In the case of impact operation without acceleration, insert the impact rod into the impact rod hole 12 and hit the impact rod with a hammer, etc., and the lead 8 will cut the Sharpie/9 and activate the impact type igniter. .

(C) When using an electric igniter, insert your finger into the pull-out ring 10, pull out the shear pin 9, and cut the conductive lead wire 11, then connect the external power supply to the igniter external terminals 6' and 6'', and the 300mA
When a current of IQII1 is passed through, the electric igniter 4 emits a flame, the heating agent exposed portion 20 burns first, and the entire battery is activated for combustion.

Effects of the Invention As described above, the present invention can be used in both electric and impact methods, and can be applied to most uses of thermal batteries. The fact that the igniter can mechanically function as a safety device, and that even in the unlikely event that one of the igniters does not work, the effectiveness of the ignition has been significantly improved should not be overlooked. Furthermore, if the impact type mechanism is not required, the entire holder can be removed and only the electric type can be used.

In this way, thermal batteries are often used for emergency purposes, especially in equipment that involves human life, so the present invention has made them more reliable than ever before. It can be said that the significance of having a 7-starting mechanism is significant.

[Brief explanation of the drawing]

The figure is a longitudinal sectional view showing an embodiment of the thermal battery of the present invention. 1...Battery, 2...Heating agent, 4...
...Electric igniter, 6', 6'...External terminal for starting, 7...Impact igniter, 8...
Pen lead, 9. Char bottle, 13. Holder.

Claims (3)

[Claims] (1) A thermal battery characterized by being equipped with an electric igniter and an impact igniter. (2) The impact type igniter is an impact type igniter having a writing lead, and the writing lead is fixed by a shear bottle when not in use, and is configured to be cut off when in use.
Thermal batteries described in section. (3) The shear pin is an external terminal of an electric igniter