High-temperature-resistant and shrinkage-resistant ceramic diaphragm and manufacturing method and application thereof

A ceramic diaphragm and high-temperature-resistant technology, which is applied in the direction of electrical components, circuits, battery pack components, etc., can solve problems such as safety concerns, inappropriate lithium-ion power batteries, poor heat resistance, etc., and achieve the effect of improving safety

Inactive Publication Date: 2018-04-13
广东骏东科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of diaphragm is not suitable for lithium-ion power batteries because of the limited heat resistance of its own matrix. Because of its poor heat resistance, the diaphragm is easy to shrink and cause a short circuit in the battery. At the same time, there are also great hidden concerns in terms of safety.

Method used

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  • High-temperature-resistant and shrinkage-resistant ceramic diaphragm and manufacturing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 6 grams of polyester fiber non-woven fabric and 4 grams of polyolefin microporous membrane are combined by a wet process to form a non-woven separator-coated microporous membrane. The non-woven separator-coated microporous membrane is used in new Production of lithium-ion power batteries. The new lithium-ion power battery to be produced is tested.

[0019] The test results are: the ionic conductivity is higher than 10-3S / cm, the pore size is 0.4μm, the film thickness is 15μm, the air permeability of the film is 100s / 100cc: 85, the shrinkage rate at 200°C is less than 1%, and the shrinkage rate at 180°C is 0. Result reference figure 1 .

Embodiment 2

[0021] Using 6 grams, 10 grams, 20 grams of polyester fiber non-woven fabrics and 4 grams, 20 grams, 15 grams of polyolefin microporous membranes are combined by a wet process to form a non-woven diaphragm-coated microporous membrane. The non-woven diaphragm laminated microporous membrane is used in the production of new lithium-ion power batteries. The new lithium-ion power battery to be produced is tested.

[0022] The test results are: the ionic conductivity is higher than 10-3S / cm, the pore size is 0.6μm, the film thickness is 60μm, the air permeability of the film is 90s / 100cc: 85, the shrinkage rate at 200°C is less than 1%, and the shrinkage rate at 180°C is 0. Result reference figure 1 .

Embodiment 3

[0024] 20 grams of polyester fiber non-woven fabric and 15 grams of polyolefin microporous membrane are combined by papermaking wet process to form a non-woven diaphragm-coated microporous film. The non-woven diaphragm-coated microporous film is used in Production of new lithium-ion power batteries. The new lithium-ion power battery to be produced is tested.

[0025] The test results are: the ionic conductivity is higher than 10-3S / cm, the pore size is 0.7μm, the film thickness is 45μm, the air permeability of the film is 80s / 100cc: 85, the shrinkage rate at 200°C is less than 1%, and the shrinkage rate at 180°C is 0. Result reference figure 1 .

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Abstract

The invention provides a high-temperature-resistant and shrinkage-resistant ceramic diaphragm and a manufacturing method and an application thereof. The high-temperature-resistant and shrinkage-resistant ceramic diaphragm is a non-woven fabric diaphragm composite micropore membrane formed by polyester fiber non-woven fabrics and polyolefin microporous membranes. The invention also provides a preparation method of the ceramic diaphragm; the preparation method comprises the following steps of performing compounding on one or more of polyester fiber non-woven fabrics of 6-20g and one or more of polyolefin microporous membranes of 4-15g by adopting a wet process. The invention also provides a novel lithium ion power battery produced by the non-woven fabric diaphragm composite micropore membranes. The wet method-prepared non-woven fabric diaphragm composite micropore membrane is heat resistant (unshrinkable at 180 DEG C, shrinkage degree less than 1% at 200 DEG C), puncturing resistant, lowin shrinkage, high in electrolyte absorption speed and amount, and high in battery baking time and efficiency, and high in safety.

Description

technical field [0001] The invention belongs to the diaphragm technology of lithium-ion batteries, and in particular relates to a high-temperature-resistant and non-shrinkable ceramic diaphragm and its manufacturing method and application. Background technique [0002] Lithium-ion battery separators currently used in the market are mostly polyethylene, polypropylene, single-layer or multi-layer and ceramic coating. This type of separator is not suitable for lithium-ion power batteries because of the limited heat resistance of its own matrix. Because of its poor heat resistance, the separator is easy to shrink and cause a short circuit in the battery. At the same time, it also has great hidden concerns in terms of safety. Contents of the invention [0003] In view of this, the present invention provides a high temperature resistant and non-shrinkable ceramic diaphragm, its manufacturing method and application. [0004] The present invention is achieved through the followin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/14H01M2/16H01M50/403H01M50/434H01M50/44H01M50/489
CPCH01M50/403H01M50/411H01M50/44Y02E60/10
Inventor 黄博然林应升孙建逊黄韩瑾
Owner 广东骏东科技有限公司
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