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Formula of heating powder for thermal battery

A technology of heating powder and heating batteries, which is applied to battery components, circuits, electrical components, etc. It can solve problems such as insufficient heat, affecting thermal life, and excess heat, and achieves long working hours and high safety.

Inactive Publication Date: 2011-11-16
GUIZHOU MEILING POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One is that the activation releases a large amount of heat instantly, making FeS 2 The instantaneous temperature around the positive electrode is significantly higher than its decomposition temperature, for FeS 2 Form a large thermal shock, resulting in FeS 2 Decomposition, affecting the output capacity;
[0005] The second is excess heat at the beginning of activation and insufficient heat at the later stage, resulting in uneven heat distribution, which affects thermal life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment one, the mass percentage of a kind of heating powder formula is composed of: iron powder (Fe) is 76.5%, potassium perchlorate (KClO 4 ) is 14.5%, eutectic salt (NaCl-Li 2 SO 4 ) is 9%. Wherein the mass percent composition of eutectic salt is: lithium sulfate accounts for 58.3% and sodium chloride accounts for 41.7%.

Embodiment 2

[0015] Embodiment two, the mass percentage of a kind of heating powder formula is composed of: iron powder (Fe) is 74%, potassium perchlorate (KClO 4 ) is 15%, eutectic salt (NaCl-Li 2 SO 4 ) is 11%. Wherein the mass percent composition of eutectic salt is: lithium sulfate accounts for 58.3% and sodium chloride accounts for 41.7%.

Embodiment 3

[0016] Embodiment three, the mass percentage of a kind of heating powder formula is composed of: iron powder (Fe) is 72%, potassium perchlorate (KClO 4 ) is 16%, eutectic salt (NaCl-Li 2 SO 4 ) is 12%. Wherein the mass percent composition of eutectic salt is: lithium sulfate accounts for 58.3% and sodium chloride accounts for 41.7%.

[0017] In the above examples, the composition and weight percentage of the present invention are: iron powder (Fe) is 72% to 82%, potassium perchlorate (KClO 4 ) is 12% to 16%, and eutectic salt is 7% to 12%. The preparation method of eutectic salt is to weigh lithium sulfate and sodium chloride which have been dried at 150°C for 6h-8h according to the proportion of lithium sulfate accounting for 38%-45% and sodium chloride accounting for 55%-62%, and sintering at 560°C It can be used after blending, curing and crushing.

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PUM

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Abstract

The invention discloses a formula of heating powder for a thermal battery. An eutectic salt accounting for 7-12% of the total weight is added into the heating powder for a thermal battery formed by mixing iron powder and potassium perchlorate. The weight ratio of iron powder to potassium perchlorate is 84:16, 83:17 or 82:18. The eutectic salt is the mixture of NaCl and Li2SO4, wherein the NaCl accounts for 38-45% of the weight of the eutectic salt, and the Li2SO4 accounts for 55-62%. The formula can prolong the service life of the thermal battery so as to prolong the working life of the thermal battery.

Description

technical field [0001] The invention relates to a heating powder formula for a thermal battery. Background technique [0002] The thermal battery is a heat-activated reserve battery. It is a disposable reserve battery that uses molten salt as an electrolyte and uses a heat source to melt it and activate it. The internal temperature is 450°C to 550°C during operation. Due to the small internal resistance of the thermal battery, high specific energy and specific power, wide operating environment temperature, long storage time, rapid and reliable activation, compact structure, non-directionality during use and not affected by installation orientation, good mechanical properties, Advantages such as no need for maintenance. [0003] Currently used LiSi / FeS 2 System thermal battery, when the activation signal is input to ignite the heating powder, a large amount of heat is released immediately, and then no heat is released, and the temperature in the battery stack is completely ...

Claims

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Application Information

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IPC IPC(8): H01M2/00H01M6/36
CPCY02E60/12
Inventor 万伟华龚英韬魏俊华赵洪楷吴启兵陈祥华张勇
Owner GUIZHOU MEILING POWER SUPPLY CO LTD
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