Polypropylene PP Battery Separator for Lithium Battery
In the structure of the lithium battery, separator is one of the key component. The properties of the separator determines of interface structure, resistance of battery,directly influencing the capacitance, circulation,safety and other properties. High performance separator is very important to improve the comprehensive performance of the lithium battery.
The main function of the separator is to separate the positive and negative pole, in case of the short-circuiting due to the contact of the two poles. Furthermore, it also help the electrolyte pass through. The material of the separator is non-conductive. Its physical and chemical properties have a great impact on battery performance.Theseparator will be different according to types of batteries. For Lithium battery series, the electrolyte is an organic solvent system,which is requires a solvent resistance separator material,generally using high strength porous polyolefin film.
20um Separator
|
Term
|
Unit
|
Inspection value
|
|
Appearance
|
|
Ivory-white
|
|
Thickness
|
micron
|
20±2
|
|
Gas permeability
|
Sec/100ml
|
350-550
|
|
Porosity
|
%
|
38-44
|
|
Puncturing Strength
|
g
|
>300
|
|
Tensile strength MD
|
Mpa
|
>90
|
|
Tensile strength TD
|
Mpa
|
>100
|
|
Film close temperature
|
℃
|
≤135
|
|
Film break temperature
|
℃
|
≥147
|
|
90℃ heat shrink MD
|
%
|
≤3.5
|
|
90℃ heat shrink TD
|
%
|
≤2
|
|
105℃ heat shrink MD
|
%
|
≤5
|
|
105℃ heat shrink TD
|
%
|
≤3
|
|
120℃ heat shrink MD
|
%
|
≤20
|
|
120℃ heat shrink TD
|
%
|
≤15
|
25um Separator
|
Name
|
PP(polypropylene) Separator
|
|
Item
|
Unit
|
Type
|
|
PP-25
|
|
Thickness
|
um
|
25
|
|
Air Permeability
|
sec/100ml
|
520
|
|
Factor of porosity
|
%
|
42
|
|
Tensile Strength
|
MD
|
Kg/cm2
|
>1200
|
|
TD
|
Kg/cm2
|
>130
|
|
Puncture Strength
|
g
|
>450
|
|
Thermal contraction (90℃ 1h)
|
MD
|
%
|
≤2.5
|
|
TD
|
%
|
≤0.5
|
|
Thermal contraction
(105℃ 1h)
|
MD
|
%
|
≤4
|
|
TD
|
%
|
≤1
|
|
Obturator temperature
|
℃
|
153
|
