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Explosion-proof lithium battery cover assembly sealing structure and preparation method thereof and sealing process

A lithium battery, lithium primary battery technology, applied in the direction of battery cover/end cover, battery pack components, manufacturing tools, etc., can solve problems such as high internal pressure, battery temperature rise, lithium battery explosion, etc.

Pending Publication Date: 2021-04-27
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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  • Explosion-proof lithium battery cover assembly sealing structure and preparation method thereof and sealing process
  • Explosion-proof lithium battery cover assembly sealing structure and preparation method thereof and sealing process
  • Explosion-proof lithium battery cover assembly sealing structure and preparation method thereof and sealing process

Examples

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preparation example Construction

[0046] The preparation method of the sealing glass material of the explosion-proof lithium battery cover group 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 10%,

[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 300-600°C at a rate...

Embodiment 1

[0078] 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%.

[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...

Embodiment 2

[0090] 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%.

[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...

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Abstract

The invention belongs to the field of sealing glass and preparation thereof, and particularly relates to an explosion-proof lithium battery cover assembly sealing structure and a preparation method thereof and a sealing process. The preparation method of the explosion-proof lithium battery cover group sealing glass material comprises the following step of: (1) selecting the following raw materials in percentage by mole: 40%-60% of SiO2, 10%-30% of B2O3, 0%-5% of Al2O3, 5%-15% of BaO, 5%-10% of Na2O, 0%-5% of K2O, 0%-5% of MgO, 0%-5% of CaO, 0%-5% of TiO2, 0%-5% of ZnO2 and 0%-5% of ZnO, wherein the various oxides should comprise various salts and acid-base compounds thereof. The invention discloses an explosion-proof lithium battery cover assembly sealing glass material and a structural design thereof for improving battery capacity, provides a preparation method of the explosion-proof lithium battery cover group sealing glass material and a sealing process, and provides a glass material which is resistant to electrolyte corrosion, excellent in electrochemical performance, controllable in mechanical strength and used for sealing a primary lithium battery cover assembly.

Description

technical field [0001] The invention belongs to the field of sealing glass and its preparation, and in particular relates to the structure of an explosion-proof lithium battery cover assembly and its preparation method and sealing process. 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 by...

Claims

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Application Information

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IPC IPC(8): C03C8/02C03B5/16H01M50/147H01M50/191H01M50/342
CPCC03C8/02C03B5/16Y02E60/10
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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