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A temperature-adjustable thermal battery heating material and its preparation method

A technology for heating materials and temperature adjustment, which is applied in the direction of delayed action cells, etc., can solve the problems of uncontrollable change degree, melting point and melting enthalpy change, and lack of practical application, etc., to achieve high versatility, stable chemical composition, and good economy Effect

Active Publication Date: 2020-08-11
SHANGHAI INST OF SPACE POWER SOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in fact, Fe / KClO 4 The reaction product KCl of the heating powder will react with Li 2 SO 4 -NaCl binary system is soluble in each other to form a new ternary electrolyte system, the minimum eutectic point and ion mobility will change, the melting point and melting enthalpy will change significantly, and the degree of change is uncontrollable. It is still in the laboratory research stage. No possibility of practical application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] According to the content of each component in the temperature-adjustable thermal battery heating material, the required raw materials are weighed, and the total weight of the raw materials is 1000g. Among them, 629 g of ultrafine Fe powder, LiClO 4 Powder 120 g, NaCl powder 93 g, LiCl powder 158 g. After drying, the superfine Fe powder, LiClO 4Add the powder and 500 g of stainless steel grinding rods into a 5 L ceramic ball mill, and mix for 4 hours; add the required LiCl powder and NaCl powder into the ball mill, and then ball mill and mix for 4 hours. After passing through a 100-mesh sieve, the desired product is obtained. ; After the heating powder is burned, 300 g of LiCl-NaCl binary molten salt is generated, and the heat storage capacity of the phase change is about 136.5 kJ (generally, the longer the working time of the thermal battery type product, the greater the heat storage capacity of the phase change heat storage material. The higher the requirement), the h...

Embodiment 2

[0036] According to the content of each component in the temperature-adjustable thermal battery heating material, the required raw materials are weighed, and the total weight of the raw materials is 1000g, of which 808 g of ultrafine Fe powder, LiClO 4 Powder 154 g, NaCl powder 31 g, LiCl powder 7 g. After drying, the superfine Fe powder, LiClO 4 Add the powder and 350 g of stainless steel grinding rods into a 5 L ceramic ball milling jar, and ball mill and mix for 4 h; add the required LiCl powder and NaCl powder into the ball mill, and ball mill and mix for 4 h again, and pass through a 100-mesh sieve to obtain the desired product ; After the heating powder is burned, 100 g of LiCl-NaCl binary molten salt is generated, the heat storage capacity of the phase change is about 45.5 kJ, and the burning speed of the heating powder is 9.96 cm / s.

Embodiment 3

[0038] According to the content of each component in the temperature-adjustable thermal battery heating material, the required raw materials are weighed, and the total weight of the raw materials is 1000g. Among them, 820 g of ultrafine Fe powder, LiClO 4 Powder 134 g, NaCl powder 31 g, LiCl powder 15 g. After drying, the superfine Fe powder, LiClO 4 Add the powder and 500 g of stainless steel grinding rods into a 5 L ceramic ball mill, and mix for 6 hours; add the required LiCl powder and NaCl powder into the ball mill, and then ball mill and mix for 6 hours, and pass through a 100-mesh sieve to obtain the desired product ; After the heating powder is burned, 100 g of LiCl-NaCl binary molten salt is generated, the heat storage capacity of the phase change is about 45.5 kJ, and the burning speed of the heating powder is 9. 78 cm / s.

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Abstract

The invention discloses a temperature adjusting type thermal battery heating material and a preparation method thereof. The heating material is prepared from ultrafine Fe powder, LiClO4 powder, LiCl powder and NaCl powder, wherein the mass percentage of the ultrafine Fe powder ranges from 62.9% to 82.0%, the mass percentage of the LiClO4 powder ranges from 10.4% to 15.4%, the mass percentage of the LiCl powder ranges from 0.7% to 16.4%, and the mass percentage of the NaCl powder ranges from 3.1% to 9.4%. according to the temperature adjusting type thermal battery heating material and the preparation method thereof, the maximum characteristic is to maintain the temperature balance inside a thermal battery, the design of heating powder of the thermal battery is changed, a certain amount of NaCl is added, a NaCl-LiCl eutectic salt type thermal buffer material is formed by ensuring that NaCl reacts with LiCl after the exothermic reaction is completed, and therefore the working time of thethermal battery can be remarkably prolonged.

Description

technical field [0001] The invention belongs to the technical field of thermal batteries, and in particular relates to a temperature-adjustable thermal battery heating material and a preparation method thereof. Background technique [0002] The thermal battery is a primary storage battery that uses the heating system of the battery itself to heat and melt the non-conductive solid-state salt electrolyte into a low-resistance ionic conductor and then enters the working state. Because of its high output power, short activation time, and no maintenance during storage, etc. It has become the most important supporting power supply product for weapons. [0003] As the thermal battery is limited by its working principle and the physical and chemical properties of the electrode material, it can only work normally when its internal temperature is between the working window temperature, and the lower limit of the working window temperature is the melting point temperature of the molten...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M6/36
CPCH01M6/36
Inventor 赵昱枫宋婷婷罗重霄韩婷婷王正仁胡华荣
Owner SHANGHAI INST OF SPACE POWER SOURCES
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