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

A lithium primary battery, sealing glass technology, applied in battery cover/end cover, battery pack parts, battery box/coating, etc., can solve problems such as improper operation, rupture, internal diaphragm shrinkage, etc.

Pending Publication Date: 2021-03-26
XIAN SEAL ELECTRONICS MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[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 by burning the diaphragm, which will cause the temperature of the battery to rise, causing the electrolyte to decompose into gas, resulting in excessive internal pressure
If the battery compartment cannot withstand this pressure, the battery will explode
(3) Improper operation or use will cause external short circuit
Due to the external short circuit, the battery discharge current is very high, causing the battery to heat up, and the high temperature causes the internal diaphragm in the battery to shrink or completely rupture, causing the internal short circuit of the lithium battery to explode

Method used

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

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preparation example Construction

[0044]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:

[0045] 1), select raw materials according to the following molar percentages:

[0046] SiO 2 : 40%~60%,

[0047] B 2 o 3 : 10%~30%,

[0048] al 2 o 3 : 0%~5%,

[0049] BaO: 5% to 15%,

[0050] Na 2 O: 5% to 10%,

[0051] K 2 O: 0% to 5%,

[0052] MgO: 0% to 5%,

[0053] CaO: 0% to 5%,

[0054] TiO 2 : 0%~5%,

[0055] ZrO 2 : 0%~5%,

[0056] ZnO: 0% to 5%,

[0057] Among them, various oxides should include various salts and acid-base compounds;

[0058] 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;

[0059] 3) Put the uniformly mixed materials in the crucible, place the crucible in a silicon-molybdenum furnace, and raise the temperature from room temperat...

Embodiment 1

[0074] 1), a sealing glass material 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%.

[0075] 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;

[0076] 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...

Embodiment 2

[0085] 1), a sealing glass material 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%.

[0086] 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;

[0087] 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...

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Abstract

The invention discloses an explosion-proof primary lithium battery cover group sealing glass material and a preparation method and a packaging process thereof, and provides a glass material which is resistant to electrolyte corrosion, excellent in electrochemical performance and controllable in mechanical strength and is used for sealing a primary lithium battery cover group. 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 ofthe 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 explosion-proof primary lithium battery cover group comprises a core column and a shell, a sealing hole is formed in the shell, the core column is inserted into the sealing hole and penetrates through the sealing hole, a circle of convex edge is arranged at the edge of the upper surface of the shell, and the shell and the core column are sealed through sealing glass to obtain the explosion-proof primary lithium battery cover group.

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 its 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 o...

Claims

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Application Information

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IPC IPC(8): C03C12/00C03C8/24C03C27/00H01M50/191H01M50/188H01M50/147
CPCC03C12/00C03C8/24C03C27/00Y02E60/10
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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