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Preparation method and sealing process of explosion-proof primary lithium battery cover group and sealing glass

A lithium primary battery, sealing glass technology, used in battery pack parts, circuits, electrical components, etc.

Pending Publication Date: 2021-04-23
XIAN SEAL ELECTRONICS MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the current lithium primary battery cover set, the present invention provides an explosion-proof lithium primary battery cover set, which has the advantages of electrolyte corrosion resistance, excellent electrochemical performance, and controllable mechanical strength. When the internal pressure of the battery is greater than the design When under pressure, the glass cracks and the internal pressure of the battery is slowly released, so that the battery will not explode violently and other dangerous situations

Method used

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  • Preparation method and sealing process of explosion-proof primary lithium battery cover group and sealing glass
  • Preparation method and sealing process of explosion-proof primary lithium battery cover group and sealing glass
  • Preparation method and sealing process of explosion-proof primary lithium battery cover group and sealing glass

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preparation example Construction

[0046] The preparation method of the sealing glass of the explosion-proof lithium primary battery cover group is characterized in that it comprises the following steps:

[0047] 1), select raw materials according to the following molar percentages:

[0048] SiO 2 : 40%~60%

[0049] B 2 o 3 : 10%~30%

[0050] Al 2 o 3 : 0%~5%

[0051] BaO: 5% to 15%

[0052] Na 2 O: 5% to 15%

[0053] K 2 O: 0% to 5%

[0054] MgO: 0% to 5%

[0055] CaO: 0% to 5%

[0056] TiO 2 : 0%~5%

[0057] ZrO 2 : 0%~5%

[0058] ZnO: 0% to 5%

[0059] Among them, various oxides should include various salts and acid-base compounds;

[0060] 2) Prepare the above-mentioned raw materials and place them in an ultra-high-speed disperser for mixing and dispersing, so that various raw materials can be mixed and dispersed evenly;

[0061] 3) Put the uniformly mixed materials in the crucible, place the crucible in a silicon-molybdenum furnace, and raise the temperature from room temperature to 300...

Embodiment 1

[0078] 1), a sealing glass for explosion-proof lithium primary battery cover group, prepared from the following raw materials in terms of molar mass ratio: SiO 2 : 40%, B 2 o 3 : 30%, Al 2 o 3 : 1%, BaO: 10%, Na 2 O: 9%, K 2 O: 3%, MgO: 2%, CaO: 2%, TiO 2 : 1%, ZrO 2 : 1%, ZnO: 1%.

[0079] 2) Prepare the above-mentioned raw materials and place them in an ultra-high-speed disperser for mixing and dispersing, so that various raw materials can be mixed and dispersed evenly;

[0080] 3) Put the uniformly mixed materials in the crucible, place the crucible in a silicon-molybdenum furnace, and raise the temperature from room temperature to 300-600°C at a rate of 8-10°C / min in an air atmosphere, and at 300-600°C Keep warm for 30-60 minutes to promote the decomposition of various salts and acid-base compounds, then raise the temperature to 1500-1700°C at a rate of 8-10°C / min, and keep warm at 1500-1700°C for 1-2 hours; stir several times during the period , make the melting ...

Embodiment 2

[0090] 1), a sealing glass for explosion-proof lithium primary battery cover group, prepared from the following raw materials in terms of molar mass ratio: SiO 2 : 45%, B 2 o 3 : 25%, Al 2 o 3 : 1%, BaO: 10%, Na 2 O: 9%, K 2 O: 3%, MgO: 2%, CaO: 2%, TiO 2 : 1%, ZrO 2 : 1%, ZnO: 1%.

[0091] 2) Prepare the above-mentioned raw materials and place them in an ultra-high-speed disperser for mixing and dispersing, so that various raw materials can be mixed and dispersed evenly;

[0092] 3) Put the uniformly mixed materials in the crucible, place the crucible in a silicon-molybdenum furnace, and raise the temperature from room temperature to 300-600°C at a rate of 8-10°C / min in an air atmosphere, and at 300-600°C Keep warm for 30-60 minutes to promote the decomposition of various salts and acid-base compounds, then raise the temperature to 1500-1700°C at a rate of 8-10°C / min, and keep warm at 1500-1700°C for 1-2 hours; stir several times during the period , make the melting ...

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Abstract

The invention discloses a preparation method and a sealing process of an explosion-proof primary lithium battery cover group and sealing glass. A glass material which is resistant to electrolyte corrosion, excellent in electrochemical performance, controllable in mechanical strength and used for sealing the primary lithium battery cover group is provided, and the compressive strength of the glass is controlled by designing glass components and the sealing thickness. The explosion-proof principle is that when the internal pressure of the battery is greater than the designed pressure in the use process, namely the pressure of the battery is overloaded, the pressure-bearing strength of the glass material is just reached, so that the glass is cracked, the internal pressure of the battery is slowly released, and the battery does not have dangerous situations such as violent explosion. The shell is made of stainless steel series and carbon steel series, the stainless steel series comprises 304L, 316L and the like, and the core column is made of series iron-nickel alloys such as alloys 4J28, 4J50, 4J52 and the like. A SiO2-B2O3-BaO-Na2O3 glass system is selected as a main body, and various metal oxides are added to adjust the thermal expansion coefficient, the glass softening temperature, the chemical stability and the mechanical properties of the glass.

Description

technical field [0001] The invention belongs to the field of sealing glass and its preparation, and in particular relates to a preparation method and sealing process of an explosion-proof lithium primary battery cover group and sealing glass. Background technique [0002] The explosion of lithium primary batteries can be mainly divided into the following aspects: (1) The moisture content inside the battery is too high during the assembly or use of the lithium battery. The water will react with the electrolyte of the lithium battery to generate gas, and react with metal lithium Lithium oxide is produced, which will lose the capacity of the battery. The gas produced in this series will increase the internal pressure of the battery. When the battery case cannot withstand it, the lithium battery will explode. (2) The internal short circuit of the battery, the battery will be discharged with a large current, which will generate a lot of heat, and a larger short circuit will occur...

Claims

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Application Information

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IPC IPC(8): C03C8/24C03C3/093C03C6/00H01M50/186H01M50/191H01M50/159C03C29/00C03C27/00
CPCC03C8/24C03C3/093C03C1/00C03C29/00C03C27/00Y02E60/10
Inventor 王哲华斯嘉冯庆刘卫红杨文波乔星徐绍华郗雪艳
Owner XIAN SEAL ELECTRONICS MATERIAL TECH CO LTD
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