An impact type lithium thermal battery assembly for bombs

Abstract

The invention discloses a percussion type lithium thermal battery component for bullets. The percussion type lithium thermal battery component integrally comprises a thermal battery, a firing mechanism and an outer structure body, wherein the thermal battery adopts a percussion cap seat formed by punching, a percussion cap is fixed by closing up the percussion cap seat, and the percussion type lithium thermal battery component is simple, reliable and good in quality consistency. The firing mechanism adopts an annular groove firing pin structure, the pin pulling force is small, and the firing is reliable. The outer structure body ingeniously designs a cross positioning gasket with the effects of accurate positioning and heat insulation, and can ensure that the firing mechanism can reliably fire the thermal battery and realize consistency in electrical performance of the percussion type lithium thermal battery component under high and low-temperature environments. The percussion type lithium thermal battery component has the characteristics of small volume, light weight, compact structure and good manufacturability, and is suitable for large-batch production.

Description

technical field [0001] The invention belongs to the technical field of pyrotechnic batteries, and mainly relates to an impact type lithium thermal battery assembly for bombs. Background technique [0002] In the past, the thermal battery and firing mechanism installed in the missile body to provide electrical performance were designed separately for each component, which mainly has the following disadvantages: [0003] 1. The separate design of thermal battery and firing mechanism takes up a lot of volume and weight, especially the weight of the firing mechanism, which reaches 200g (excluding thermal battery and outer structure). [0004] 2. In the previous design of percussion-type activated thermal batteries, the shell with screw hole and supporting screws are used to fix the percussion cap, and the screws are tightened to compress the percussion cap, and the shell with screw cap and supporting screws They are all processed by lathing, the height occupied by the fixed fla...

AI Technical Summary

Problems solved by technology

[0003] 1. The separate design of the thermal battery and firing mechanism takes up a lot of volume and weight, especially the weight of the firing mechanism, which reaches 200g (excluding the thermal battery and outer structure)

[0004] 2. In the previous design of percussion-type activated thermal batteries, the shell with screw hole and supporting screws are used to fix the percussion cap, and the screws are tightened to compress the percussion cap, and the shell with screw cap and supporting screws They are all processed by lathing, the height occupied by the fixed flash cap is large, and the corresponding size of the thermal battery is also large. Moreover, the lathe processing process of this method is more complicated than the stamping process, the material consumption is large, the cost is high, and it is difficult to control the consistency of quality Big

[0005] 3. In the previous design of the firing mechanism, the firing pin is connected with the safety pin with a hole structure. The force of pulling out the pin for releasing the safety is relatively large, and the head of the safety pin must be aligned with the hole where the firing pin is inserted during assembly, which is time-consuming and laborious.

Moreover, the volume and weight of the firing mechanism are relatively large, which cannot meet the volume and weight required by the technical requirements of this type of projectile-impact lithium thermal battery assembly.

[0006] 4. In the past, the separate thermal battery and firing mechanism required special tooling calibration during assembly, and the inspection and calibration was time-consuming and laborious. Once the firing pin of the firing mechanism deviated from the center of the thermal battery, the activation reliability of the thermal battery would be reduced.

The thermal battery is connected and fixed by welding the metal lugs and the metal shell case. When the thermal battery is working, the heat is transferred from the thermal battery shell to the shell shell of the outer structure through the metal lugs, and the internal temperature will quickly drop to the working temperature range. The following will cause the electrolyte of the unit cell to solidify and stop the hot battery from working; the rapid heat conduction will cause the surface temperature of the hot battery to rise rapidly, which will cause the temperature around the hot battery to rise and affect the reliable operation of electronic components

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