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Device and method for measuring resistance of pressurized separator

A technology of separators and resistances, which can be used in measuring devices, measuring resistance/reactance/impedance, measuring electricity, etc., and can solve problems such as volume change

Pending Publication Date: 2021-06-25
LG ENERGY SOLUTION LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, dendrites generated during the charge and discharge process of secondary batteries lead to volume changes, which lead to stress on the separator

Method used

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  • Device and method for measuring resistance of pressurized separator
  • Device and method for measuring resistance of pressurized separator
  • Device and method for measuring resistance of pressurized separator

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0071] Example 1: Manufacture of a divider

[0072] Al 2 o 3 powder, making the binder polymer with Al 2 o 3 The weight ratio is equal to 10:90.

[0073] Subsequently, the Al 2 o 3 The powder was pulverized and dispersed for more than 12 hours to prepare a binder polymer slurry. Al of binder polymer paste 2 o 3 The particle size is about 400 nm.

[0074] Therefore, an organic and inorganic composite separator was prepared by coating both sides of a polyethylene porous film having a thickness of 18 μm (porosity 45%) to a thickness of 3 μm using a dip coating method. As a result of measuring the organic and inorganic composite separator by a porosimeter, the pore diameter and porosity of the porous coating layer coated on the polyethylene porous membrane were 0.4 μm and 55%, respectively.

example 2

[0075] Example 2: Manufacture of a divider

[0076] A separator was prepared in the same manner as in Example 1 except that a slurry containing a ceramic component was coated in a thickness of 2.5 μm on both sides of a 7 μm thick polyethylene porous membrane.

example 3

[0077] Example 3: Fabrication of Dividers

[0078] A separator was produced in the same manner as in Example 1, except that a porous film of 1.5 μm was formed on both sides of a 9 μm thick porous film by selecting one having a high molecular weight from among commercially available polyethylene porous films. The thickness of coating slurry containing ceramic components.

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Abstract

The present invention relates to a device and method which can measure, in real time, the resistance, depending on pressure changes, of a separator that is immersed in an electrolyte, and enables analysis of the resistance properties of a separator reflecting the real operating state of a secondary battery.

Description

technical field [0001] The present invention relates to a device and a method for measuring the electrical resistance of extruded separators. [0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2019-0132213 filed on October 23, 2019, and the entire content of this Korean Patent Application is incorporated herein by reference. Background technique [0003] As the price of energy increases due to the depletion of fossil fuels and the interest in environmental pollution increases, the demand for environmentally friendly alternative energy sources is also increasing. In particular, the demand for secondary batteries as energy sources is rapidly increasing as technology develops and demands for mobile devices increase. Regarding the shape of the secondary battery, a pouch-type secondary battery is in great demand because it can be applied to mobile products having a small thickness, such as mobile phones. [0004] Such a pouch-type...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/02G01R31/389
CPCG01R27/02G01R31/389H01M50/40H01M10/052H01M2220/30H01M10/4285G01R31/3865G01N27/12H01M50/489Y02E60/10
Inventor 尹钟建李廷范河会珍
Owner LG ENERGY SOLUTION LTD