TWI642226B - Ignition component and thermal battery having the same - Google Patents

Abstract

The present invention provides a igniting element comprising: a ceramic fiber having no asbestos component; zirconium powder; and strontium chromate. The invention also provides a thermal battery comprising: a housing; an end cover covering the housing and defining an internal space together with the housing; a pair of terminals passing through the end cover; an excitation element, The system is disposed in the inner space and electrically connected to the pair of terminals; one of the ignition elements as described above is disposed in the inner space and adjacent to the excitation element; and a battery stack is provided In the internal space, the pair of terminals are electrically connected and adjacent to the ignition element. The ignition element of the present invention and the thermal battery to which the ignition element is applied can be applied to a power source of a missile.

Description

Pilot element and thermal battery using the same

The present invention relates to a igniting element, and more particularly to an igniting element using a non-asbestos component. The invention also relates to a thermal battery to which the ignition element is applied.

A thermal battery is a thermally activated and activated pre-storage battery. When stored, the electrolyte is a non-conductive solid. When used, it is activated by a power source or an impact igniting its internal activation chain and a heat sheet to melt the electrolyte into a conductive ion conductor. The battery operating temperature is 400-600 °C. The heat battery activation chain is a combination of an excitation element and an ignition element.

The commonly used electrolyte is a mixture of potassium chloride-lithium chloride eutectic salt or lithium halide, the negative electrode active material is mostly made of a lithium metal alloy, and the positive electrode active material is used for vanadium, iron, cobalt, nickel-based metal sulfide or oxidation. Things etc. act as electrochemical systems. The hot film is a heat source inside the heat battery and is obtained by mixing iron powder with potassium perchlorate.

With high power output characteristics, the thermal battery is mostly used as a power source for missiles (US4675257, US5382479, US7354678). In order to achieve a service life of more than 30 years, to deal with high pressure due to thermal decomposition during work, to achieve high environmental stress, and the like, the heat battery is generally sealed in a metal container. The metal terminal on the thermal battery end cap is made by a glass melting technique, mainly as a path for external power supply and activated power output when the thermal battery is activated, which is a configuration in which the power source is thermally activated and activated.

Conventionally, a wire-bridge heating method is used as a power source for starting the excitation element of the explosive. However, this method is susceptible to electromagnetic waves and causes malfunction, resulting in failure. In order to overcome the problem of electromagnetic interference, the use of a high excitation current starting excitation element is likely to cause an overload of the system. The semiconductor microstructure (Semiconductor-Bridge) heating as a method of ignition (SAND96-0862C, US4708060, US586570) replaces the heating method of the wire bridge structure, and can overcome the effect of electromagnetic waves. In response to the corrosive effect of the composition of the gunpowder on the microstructure of the semiconductor, the technology of laser-igniting the gunpowder is born accordingly. This technology usually uses a laser ignitor combined with a laser generator, a lens, an aperture, etc. as the excitation element. (SAND87-3032, DSTO-TR-0068, SAND2005-0072). Or directly combine the fiber with the explosive (DSTO-TR-1448). The activation device disclosed in the Patent Application Publication No. CN106169588A of the People's Republic of China is a laser generator that combines a laser energy transmitting fiber with a laser ignition torch (composed of a lens, a pyrotechnic, and a separator).

The energy released by the excitation element and the energy required to ignite the ignition element must be properly matched to ensure proper operation of the activation chain and activate the thermal battery.

The traditional ignition element is made of hot paper, which is a base material based on asbestos fibers (CN1068483), which is deposited or mixed with a mixture of zirconium powder and strontium chromate.

Non-asbestos products are the basic requirements of the universal. However, the advantages of natural asbestos fibers are not replaced by ordinary synthetic fibers. The stone tissue paper made of asbestos fiber has the processing property of punching and cutting, superior heat resistance, dimensional stability under high temperature environment, especially the substrate for heat insulating material and heating element inside the heat battery. In order to ensure that the activation chain can activate the thermal battery, parameters such as composition and composition characteristics of the ignition element must be redesigned.

It is an object of the present invention to provide a pilot element that replaces a conventional ignition element based on asbestos fibers.

To achieve the above and other objects, the present invention provides an ignition element comprising: a ceramic fiber having no asbestos composition; zirconium powder; and barium chromate.

In an embodiment of the invention, the ignition element is in the form of a strip or a column.

In an embodiment of the invention, the ignition element has a heat of 320 to 400 cal/g.

In an embodiment of the invention, the material of the non-asbestos-containing ceramic fiber is selected from the group consisting of sodium oxide, magnesium oxide, calcium oxide, aluminum oxide, and cerium oxide.

In an embodiment of the invention, the non-asbestos-containing ceramic fiber has a diameter of 0.2 to 3.0 μm.

In an embodiment of the invention, in the ignition element, the weight percentage of the non-asbestos-containing ceramic fiber is 10-20%.

Another object of the present invention is to provide a thermal battery in place of a conventional thermal battery containing asbestos-containing components.

To achieve the above and other objects, the present invention also provides a thermal battery comprising: a housing; an end cover covering the housing and defining an internal space together with the housing; a pair of terminals that are traversed The end cap; an excitation element disposed in the inner space and electrically connected to the pair of terminals; one of the ignition elements as described above disposed in the inner space and adjacent to the excitation element; And a battery stack disposed in the internal space, electrically connected to the pair of terminals, and adjacent to the ignition element.

In one embodiment of the invention, the excitation element is a laser element, an electric match or an igniter.

In an embodiment of the invention, the laser element comprises: a laser diode; and a lens disposed in the optical path of the laser diode.

In an embodiment of the invention, the laser diode has an emission wavelength of 760 to 980 nm.

In an embodiment of the invention, the power of the laser diode is 200 to 1000 mW.

In an embodiment of the invention, the battery stack has a central aperture, and the ignition element is disposed in the central aperture.

In an embodiment of the invention, the ignition element is disposed at an edge of the stack.

In an embodiment of the invention, the excitation element is disposed adjacent to the top of the thermal battery.

In an embodiment of the invention, the excitation element is disposed adjacent to a bottom of the thermal battery.

The energy released by the excitation element and the energy required to ignite the ignition element and the energy released by the ignition element and the energy required to ignite the heat sheet must be properly matched to ensure proper operation of the activation chain and activate the thermal battery. The hot paper is made by mixing ceramic fiber, zirconium powder and strontium chromate without asbestos component, and then processed into an ignition element. The three must be in the proper proportions to allow the ignition element to be fully ignited instantaneously while still maintaining its appearance integrity.

Thereby, the ignition element of the present invention and the thermal battery using the ignition element can avoid the harm of the components containing the asbestos to the human body and the environment.

In order to fully understand the objects, features and advantages of the present invention, the present invention will be described in detail by the following specific embodiments and the accompanying drawings.

Example 1:

The ignition element of this embodiment is prepared by the following procedure:

The strontium chromate, the zirconium powder, the ceramic fiber without the asbestos component, and the like were added to pure water and stirred for 30 minutes. The uniformly mixed slurry was deposited, filtered, and pressure molded to obtain a thermal paper free of asbestos. Further, the hot paper is punched into a strip-shaped ignition element according to actual needs, or the hot paper is rolled into a columnar ignition element.

In the ignition element of the embodiment, the weight percentage of the non-asbestos-containing ceramic fiber is 15%; the weight percentage of zirconium powder is 40%; and the weight percentage of strontium chromate is 45%, but the present invention Not limited to this. Preferably, the ratio of the components is adjusted such that the heat of the igniting element produced is between 320 and 400 cal/g.

In the present embodiment, the non-asbestos-containing ceramic fiber contains cerium oxide, but the present invention is not limited thereto. Preferably, the material of the non-asbestos-containing ceramic fiber is selected from the group consisting of sodium oxide, magnesium oxide, calcium oxide, aluminum oxide and cerium oxide.

In the present embodiment, the diameter of the non-asbestos-containing ceramic fiber is controlled to be between 1.5 and 2.0 μm, but the present invention is not limited thereto. Preferably, the diameter of the non-asbestos-containing ceramic fiber is controlled to be between 0.2 and 3.0 μm.

Example 2:

As shown in FIG. 1 , the thermal battery 1 of the present embodiment comprises: a housing 10; an end cover 11 covering the housing 10 and defining an internal space 12 together with the housing 10; a pair of terminals 20 Passing through the end cover 11; an excitation element 30 is disposed in the internal space 12 and electrically connected to the pair of terminals 20; one of the ignition elements 40 prepared through Embodiment 1 is set In the internal space 12, adjacent to the excitation element 30; and a battery stack 50 disposed in the internal space 12, electrically connected to the pair of terminals 20, and adjacent to the ignition element 40.

In this embodiment, the excitation element 30 is an electric match N32B (Daveyfire).

In this embodiment, the battery stack 50 includes a plurality of unit groups 51, each of which includes a heat sheet 52, a cathode sheet 53, an electrolyte sheet 54, and an anode sheet 55.

In this embodiment, the battery stack 50 has a central hollow, and the ignition element 40 is disposed in the central hollow, but the invention is not limited thereto. The ignition element 40 can also be disposed at the edge of the stack 50. The arrangement between the igniting element 40 and the battery stack 50 is not particularly limited as long as the igniting element 40 can sufficiently activate the battery stack 50.

In this embodiment, the excitation element 30 is disposed adjacent to the top of the thermal battery 1, but the invention is not limited thereto. The excitation element 30 can also be disposed adjacent to the bottom of the thermal battery 1. The position at which the exciting element 30 is disposed is not particularly limited as long as it is adjacent to the igniting element 40, which is sufficient to excite the igniting element 40.

In this embodiment, the components of the hot sheet 52, the cathode sheet 53, the electrolyte sheet 54, and the anode sheet 55 in the stack 50 are as described in the prior art.

After testing, a current of 1 A was applied for 200 msec at the pair of terminals 20, and the ignition element 40 of Example 1 was ignited by an electric match N32B (Daveyfire) as the excitation element 30 to activate the thermal battery 1. After activation, the power generated by the stack 50 is output via the pair of terminals 20.

Example 3:

The structure of the thermal battery of this embodiment is substantially the same as that of the second embodiment, but the thermal battery of the third embodiment replaces the electric match N32B (Daveyfire) of the second embodiment with an igniter NEI-22 (NEI) as an excitation element.

After testing, a 3.5 A current of 40 msec was applied to the terminal of the thermal battery of this embodiment, and the ignition element of Example 1 was ignited by an igniter NEI-22 (NEI) as an excitation element to activate the thermal battery.

Example 4:

The structure of the thermal battery of this embodiment is substantially the same as that of the second embodiment, but the thermal battery of the fourth embodiment replaces the electric match N32B (Daveyfire) of the second embodiment with a laser element as an excitation element.

In this embodiment, the laser element includes: a laser diode; and a lens disposed in the optical path of the laser diode, but the invention is not limited thereto.

In this embodiment, the emission wavelength of the laser diode is 980 nm, but the invention is not limited thereto. Preferably, a laser diode having an emission wavelength between 760 and 980 nm is used.

In this embodiment, the power of the laser diode is 300 mW, but the invention is not limited thereto. Preferably, a laser diode having a power between 200 and 1000 mW is used.

After testing, a 0.3 A current of 200 msec was applied to the terminal of the thermal battery of this example, and the ignition element of Example 1 was ignited by a laser diode as an excitation element to activate the thermal battery.

As described in the above embodiments 1 to 4, application of an appropriate current activates the heat battery to which the ignition element of the present invention is applied, and has excellent reliability, and the heat battery can be applied to the power source of the missile. Furthermore, the ignition elements of the present invention can be excited by a variety of different excitation elements. It can be seen that the ignition component without the asbestos component of the present invention can completely replace the conventional ignition component containing the asbestos component, thereby avoiding the harm of the components containing the asbestos to the human body and the environment.

The invention has been described above in terms of the preferred embodiments, and it should be understood by those skilled in the art that the present invention is not intended to limit the scope of the invention. It should be noted that variations and permutations equivalent to those of the embodiments are intended to be included within the scope of the present invention. Therefore, the scope of protection of the present invention is defined by the scope of the patent application.

1‧‧‧Heat battery

10‧‧‧shell

11‧‧‧End cover

12‧‧‧Internal space

20‧‧‧ terminals

30‧‧‧Excitation element

40‧‧‧ ignition components

50‧‧‧Battery stack

51‧‧‧Unit Group

52‧‧‧hot film

53‧‧‧ cathode film

54‧‧‧ electrolyte tablets

55‧‧‧Anode film

Fig. 1 is a schematic view showing a heat battery of Embodiment 2 of the present invention.

Claims (5)

A thermal battery comprising: a housing; an end cover covering the housing and defining an internal space together with the housing; a pair of terminals traversing the end cover; an excitation element, the excitation element For the laser element, the laser element has an emission wavelength range of 760 to 980 nm, and the laser element has a power range of 200 to 1000 mW. The excitation element is disposed in the internal space and electrically connected to the pair of terminals. Connecting; a igniting element comprising a non-asbestos-containing ceramic fiber, zirconium powder and strontium chromate, the non-asbestos-containing ceramic fiber having a weight percentage of 10 to 20% and the non-asbestos-containing ceramic fiber The material is selected from the group consisting of sodium oxide, magnesium oxide, calcium oxide, aluminum oxide and cerium oxide, the ignition element is disposed in the inner space adjacent to the excitation element; and a battery stack The inner terminal is disposed in the inner space, electrically connected to the pair of terminals, and adjacent to the ignition element. The thermal battery of claim 1, wherein the ignition element is in the form of a strip or a column. The thermal battery according to claim 1, wherein the ignition element has a heat of 320 to 400 cal/g. The thermal battery according to claim 1, wherein the non-asbestos-containing ceramic fiber has a diameter of 0.2 to 3.0 μm. The thermal battery of claim 1, wherein the laser element comprises: a laser diode; and a lens disposed in the optical path of the laser diode.