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EVAPORE ® A NEW BATTERY SEPARATOR FILM
BY KARL ZIMMERMANN
ON FEBRUARY 19TH, 2015
1
2
© Brückner Maschinenbau 3
World LiB Separator Market Size
Outlook for separators
Source: AVICENNE ENERGY Analysis 2014
2,5 bn.m2 in 2025
750 Mio m2
in 2014
© Brückner Maschinenbau 4
Separator Film - the Key within the Battery
One separator film for all needs? Separator
Film
Wettability
Permeability
Electrical
resistivity
Costs
Safety
Puncture
strength
Lifetime
Performance
Requirements
Thickness
Range
Tolerance
Mechanics
Tensile Strength
Puncture Resistance
Pore
Porosity
Pore Size & Distribution
Gurley
Thermal
Shrinkage
Melt Integrity
Shutdown
Electric
Electrolyte Resistivity
Insulating Resistance
Chemical Costs
Production Costs
Electrolyte Compatibility
Battery Separator Film for Li-Ion-Batteries
General Requirements
© Brückner Maschinenbau
© Brückner Maschinenbau
Market Development
Source: Avicenne Energy, The rechargeable battery market 2013-2025, 4/2014
High production efficiency,
uptime & output
Low production costs
Minimized energy consumption
Easy operation, low maintenance
Wet Dry Evapore
© Brückner Maschinenbau
Profitability in Battery Separator Film Production
How to succeed in a rapidly growing market?
$ / m
² 7
© Brückner Maschinenbau 8
World LiB Separator Market Size
Outlook for ceramic coated separators
Source: AVICENNE ENERGY Analysis 2014
2,5 bn.m2 in 2025
750 Mio m2
in 2014
Lithium-Ion Batteries
Requirements 3C vs EV
© Brückner Maschinenbau
Mobile electronic applications:
mobile phones, notebooks, PDAs,… (3C) EV applications
Moderate safety precautions Highest safety precautions
Lifetime 2-3 years Typical life time ~ 10 years
Moderate environmental conditions Critical environmental conditions
(-30°C – 70°C, mechanical stress)
Charge- / discharge current 1C Full EV : 5C Hybrid EV : 20C
© Brückner Maschinenbau
Production of Ceramic Coated BSF
Stretching Equipment for BSF
Line layout
Film thickness range 10 – 30 µm
Net film width 4,2 m
Line speed ( mech ) 50 m/min
Line capacity 9000 m²/h
Width 0,5 m up to 1,4 m
Single or Double Side Coating
Coating Equipment for BSF
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BSF – EV Development
Scanning Electron Microscopy (SEM) – cross section
Ceramic Coating Layer
PE - Evapore® Base Separator
Ceramic Coating Layer
10 x 10cm samples (MD marked) are
put in an oven at 105, 120, 140, 160 °C
for 1 hour
Change in dimensions in MD and TD
are determined
Percentaged shrinkage is given in
relation to original size of sample
© Brückner Maschinenbau
BSF – EV Development
Shrinkage
Oven Test 1 hour @ 160 °C
before after
with
coating without
coating
after
© Brückner Maschinenbau 13
0
10
20
30
40
50
60
70
80
90°C 105°C 120°C 140°C 160°C 180°C 200°C
Shri
nka
ge [
%]
Temperature
Hot Air Shrinkage Test (1h) 16 µm PE uncoated vs. PE coated Separator
Uncoated PE Separator
Coated PE Separator
TD MD
MD, TD
Basic characterization in small cells
80 x 50mm 1.2 Ah
Detailed tests in large format cells
150 x 300mm 40 Ah
Performance tests
- cycle life
- high rate capability
Safety / Abuse tests
- overcharge
- hot oven
- short circuit
- nail penetration
Cell Test for EV
Battery Tests
Cycle Life Rate Capability
© Brückner Maschinenbau 15
BSF Types Most Commonly Used
Comparison of specific BSF properties
© Brückner Maschinenbau -CONFIDENTIAL-
BSF Production Cost
Comparison of existing technologies for BSF production + coating
© Brückner Maschinenbau -CONFIDENTIAL-
0
0.5
1
1.5
2
2.5
Wet Dry Evapore®
Direct Cost Coating
0.9
$ / m²
2.3
1.3
1.0
0.4
0.5 2 x 2µm
ceramic coating
Brückner recipe
range
0.5-1.0
range
0.5-1.0
ceramic coating
depending on
coating recipe &
materials
2.0
Battery Separator Film Line
© Brückner Maschinenbau 18
Choose the right partner for your BSF Production
Brückner – worldwide No. 1 in film stretching technology
Unique, patented semi-dry EVAPORE® process
Proven equipment, vast process know-how, product guarantees,
unmatched R&D capacities
© Brückner Maschinenbau 19
Thank You
