CN105529476A - A process for shortening the activation time of thermal batteries - Google Patents

Abstract

The invention discloses a technique for shortening activation time of thermal batteries. An ignition strip on the periphery of a galvanic pile is turned upwards to the lower part of a mesopore asbestos pad; the ignition strip is directly burnt after an electric igniter is detonated; and heating substances in each single battery are ignited through the ignition strip from top to bottom, so that the thermal batteries are activated. According to the technique, traditional activation processes of detonating the electric igniter, igniting a heating plate, burning the ignition strip and finally igniting each single battery from top to bottom are changed into the processes of directly burning the ignition strip after detonating the electric igniter and then igniting each single battery from top to bottom, so that the activation time can be shortened by about 0.1-0.2 second; and the technique is simple in process, does not generate a redundant substance, and is of great significance in improvement of the activation time.

Description

A process for shortening the activation time of thermal batteries

technical field

The invention belongs to the technical field of thermal batteries, and in particular relates to a process for shortening the activation time of thermal batteries.

Background technique

The thermal battery is a kind of thermally activated reserve battery that uses the heating system of the battery itself to heat and melt the non-conductive solid-state salt electrolyte into an ionic conductor and enter the working state. The internal electrolyte of the thermal battery is a eutectic melt composed of two or more inorganic salts. At room temperature, the electrolyte is a non-conductive solid; when in use, the electric ignition head inside the battery is ignited by an external current, thereby igniting the heating inside the battery. material, the internal temperature of the battery rises rapidly, causing the molten salt electrolyte to melt and conduct electricity, activate the battery, and output electricity. The use of solid salt electrolytes is the main feature of thermal batteries, which are clearly distinguished from batteries using aqueous electrolytes, organic electrolytes, and solid electrolytes. This makes the thermal battery have the characteristics of long storage time, high output current density, high specific energy, wide temperature range, and no need for maintenance and maintenance during storage, so it is widely used in the working power supply of various missiles, torpedoes and nuclear weapons. application.

The activation time of the thermal battery refers to the time elapsed from the activation signal being given to the minimum voltage required for the output of the thermal battery. Modern weapon systems require fast response and good mobility, and put forward higher requirements for the activation time of the battery. The general process of thermal battery activation: giving the activation signal (current), detonating the electric ignition head, igniting the heating sheet, burning the ignition strip, and igniting the heating material in each single battery, etc. When the temperature in the middle of the stack reaches When the melting point of the electrolyte is above, the electrolyte melts to form an ion conductor, which activates the battery to output electric energy. The activation time of the battery is related to the ambient temperature before activation, the load current during activation, the burning rate of the ignition strip, the burning rate of the heating plate, the diameter of the single battery, and the design of the calorific value, but these conditions are generally the same as the use of thermal batteries. The requirements are related to the design scheme and cannot be changed casually, so other design measures must be taken in order to further shorten the activation time of the battery.

Contents of the invention

In order to solve the above problems, the present invention provides a process for shortening the activation time of a thermal battery. The thermal battery is a stack composed of a plurality of single cells connected in series and in parallel. The thermal battery includes an electric ignition head, an ignition strip, heating a substance, the method comprising the steps of:

(1) detonate the electric ignition head, and directly burn the ignition strip after the electric ignition head is detonated;

(2) The ignition strip ignites the heating substance in each single battery from top to bottom;

(3) The heating material in each single battery burns to activate the whole thermal battery.

Preferably, the detonation of the electric ignition head in the step (1) adopts an electric activation method.

Preferably, the ignition strip in the step (2) is turned over on the periphery of the electric stack to a position where it can burn after the ignition head is detonated.

Compared with the prior art, the present invention relates to a process for shortening the activation time of the thermal battery. The ignition strip around the electric stack is turned up to the lower part of the mesopore asbestos pad, and the electric ignition head and the ignition heating sheet are reburned. The ignition strip and the activation process of each single cell in the stack are changed to directly burn the ignition strip after detonating the electric ignition head, and then ignite each single cell in the stack, which can improve the activation The time is about 0.1s~0.2s. This improved method is simple in process and does not produce redundant products, which is of great significance for improving the activation time.

Description of drawings

Fig. 1 is a kind of technological process flowchart of shortening thermal battery activation time of the present invention;

Figure 2(a) is the activation map of the traditional structure;

Fig. 2(b) is the activation map after adopting the present invention.

detailed description

The unit battery provided by the embodiment of the present invention has a diameter of 68mm, a total height of 95mm, a working load of 16A, and a low temperature working temperature of -45°C. The temperature is low, in order to ensure that the activation time of the battery meets the requirements, it is necessary to design the distribution of the ignition bars in the stack according to the method of the present invention; as shown in Figure 1, Figure 2(a) and Figure 2(b), the present invention provides A method for shortening the activation time of a thermal battery, the thermal battery is a stack composed of a plurality of single cells connected in series and in parallel, the thermal battery includes an electric ignition head 1, an ignition strip 2, and a heating substance 3, the method includes the following steps step:

(1) The electric ignition head 1 is detonated by means of electric activation, and the ignition strip 2 is directly burned after the electric ignition head 1 is detonated;

(2) The ignition strip 2 ignites the heating substance 3 in each single battery from top to bottom;

(3) The heating substance 3 in each single battery burns to activate the whole thermal battery.

The test results show that the battery produced according to the invention works under the condition of low temperature and full load, and the activation time is not more than 0.7s. The battery produced without the method of the invention is discharged under the same conditions, and the activation time is 0.95s.

The invention relates to a process for shortening the activation time of a thermal battery, that is, the traditional activation process of detonating an electric ignition head, igniting a heating sheet, and then burning an ignition strip is changed to directly burning an ignition strip after detonating an electric ignition head, so that The activation time is increased by about 0.1 s to 0.2 s. This improved method is simple in process and does not produce redundant substances, which is of great significance for increasing the activation time.

The preferred embodiments of the invention disclosed above are only to help illustrate the invention. The preferred embodiments are not exhaustive in all detail, nor are the inventions limited to specific embodiments described. Obviously, many modifications and variations can be made based on the contents of this specification. This description selects and specifically describes these embodiments in order to better explain the principle and practical application of the present invention, so that those skilled in the art can well understand and utilize the present invention. The invention is to be limited only by the claims, along with their full scope and equivalents.

Claims (3)

1. A process for shortening the activation time of a thermal battery, wherein the thermal battery is a stack composed of a plurality of single cells connected in series and in parallel, and the thermal battery comprises an electric ignition head, an ignition strip, a stack, and a heating substance, It is characterized in that the process method comprises the following steps: (1) detonate the electric ignition head, and directly burn the ignition strip after the electric ignition head is detonated; (2) The ignition strip ignites the heating substance in each single battery from top to bottom; (3) The heating material in each single battery burns to activate the whole thermal battery. 2 . The process for shortening the activation time of the thermal battery according to claim 1 , wherein the method of detonating the electric ignition head in the step (1) is electric activation. 3 . 3. The process for shortening the activation time of the thermal battery according to claim 1, characterized in that in the step (2), the ignition strip is turned up and extended to a position where it can be directly burned after the electric ignition head is detonated.