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Three-layer structure single battery of thermal battery

A single battery, three-layer structure technology, applied in the direction of delayed action cells, etc., can solve the problems of no practical application and poor discharge effect, and achieve the effect of improving the weight ratio, high versatility and good economy.

Inactive Publication Date: 2018-05-01
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 KCl, another reaction product of the heating powder, will be miscible with the LiF-LiCl-LiBr all-lithium electrolyte to form a new quaternary electrolyte system. The minimum eutectic point and ion mobility will change, and the discharge effect is extremely poor. Possibility of practical application

Method used

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  • Three-layer structure single battery of thermal battery
  • Three-layer structure single battery of thermal battery
  • Three-layer structure single battery of thermal battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Take the required raw materials according to the content of each component in the heating-positive electrode layer, and the total weight of the raw materials is 3g, wherein the mass percentage of active Fe powder is: 62.4%, LiClO 4 The mass percentage of LiF is 15.6%, the mass percentage of anhydrous LiF is 2.7%, and the mass percentage of anhydrous LiBr is 19.3%. After drying, sieve with a 100-mesh sieve frame, and sieve 30-40 times until the four components are evenly mixed to obtain the required heating powder. Take by weighing 1.0g of LiB alloy, 2.5g of total lithium spacer powder (the mass percentage of MgO is 60%, and the balance is LiF-LiCl-LiBr eutectic salt, and in this eutectic salt, the mass percentage of LiF is 9% , the mass percentage of LiCl is 22%, and the mass percentage of LiBr is 69%). Conduct electrical performance test after assembling the single battery, the test temperature is 550°C, and the steady-state current density is 50mA / cm 2 , pulse curre...

Embodiment 2

[0034] Take the required raw materials according to the content of each component in the heating-positive electrode layer, and the total weight of the raw materials is 3g, wherein the mass percentage of active Fe powder is: 75.2%, LiClO 4The mass percentage of LiF is 10.3%, the mass percentage of anhydrous LiF is 1.8%, and the mass percentage of anhydrous LiBr is 12.7%. After drying, sieve with a 100-mesh sieve frame, and sieve 30-40 times until the four components are evenly mixed to obtain the required heating powder. Take by weighing LiSi alloy 1.0g, all lithium spacer powder 2.5g (the mass percentage composition of MgO is 40%, and surplus is LiF-LiCl-LiBr eutectic salt, and the mass percentage of LiF is 9% in this eutectic salt, The mass percent of LiCl is 22%, and the mass percent of LiBr is 69%). After the single battery is assembled, the electrical performance test is carried out. The weight specific capacity of the single battery is 300A·s / g.

Embodiment 3

[0036] Take the required raw materials according to the content of each component in the heating-positive electrode layer, and the total weight of the raw materials is 3g, wherein the mass percentage of active Fe powder is: 68.5%, LiClO 4 The mass percentage of LiF is 13.0%, the mass percentage of anhydrous LiF is 2.3%, and the mass percentage of anhydrous LiBr is 16.2%. After drying, sieve with a 100-mesh sieve frame, and sieve 30-40 times until the four components are evenly mixed to obtain the required heating powder. Take by weighing LiB alloy 1.0g, all lithium spacer powder 2.5g (the mass percent composition of MgO is 50%, and surplus is LiF-LiCl-LiBr eutectic salt, and in this eutectic salt, the mass percent of LiF is 9% , the mass percentage of LiCl is 22%, and the mass percentage of LiBr is 69%). After the single battery is assembled, the electrical performance test is carried out, and the weight specific capacity of the single battery is 340A·s / g.

[0037] In summar...

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Abstract

The invention discloses a three-layer structure single battery of a thermal battery. The single battery comprises a negative current collector plate, a lithium alloy negative electrode layer, an isolation layer, a heating-positive electrode layer and a positive current collector plate which are sequentially laminated, wherein the heating-positive electrode layer is prepared from active Fe powder,LiClO4, anhydrous LiF and anhydrous LiBr. A positive electrode layer in a traditional four-layer structure single thermal battery is abandoned; a novel heating material of LiClO4-active Fe powder is utilized and then the anhydrous LiF and the anhydrous LiBr are added to the novel heating material to form the heating-positive electrode layer; the design of heating powder of the thermal battery is changed; a product after exothermic reaction is ended is directly subjected to electrochemical reaction as a positive electrode material for the thermal battery, so that the specific capacity of the single battery of the thermal battery is significantly improved, the cost is greatly reduced since a traditional sulfide positive electrode material is no longer used, and the economical efficiency is good. Furthermore, the preparation technology of the single battery disclosed by the invention is consistent with that of a traditional thermal battery, the universality of the production process is high, the economical efficiency is good and the single battery has a good engineering application prospect.

Description

technical field [0001] The invention belongs to the technical field of heat batteries, and in particular relates to a three-layer structure type heat battery single battery. 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] Since Dr. Erb of Germany first proposed it at the end of World War II, the basic structure of the thermal battery has not changed significantly. The single battery of the thermal battery is assembled from heating powder, positive electrode powder, separator powder and negative electrode materials according to a certain proportion. The bulk battery has a four-l...

Claims

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Application Information

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IPC IPC(8): H01M6/36
CPCH01M6/36
Inventor 罗重宵叶丹宏韩婷婷胡冉王超王晓敏白云飞江黎莉
Owner SHANGHAI INST OF SPACE POWER SOURCES
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