PoLiFlex™

JHeydecke/17Jun2007/ Company Confidential March 08 12007 proprietary material of VARTA Microbattery GmbH

Basisfolie

Technology

VARTA Microbattery

PoLiFlex

Lithium Polymer Technology

PoLiFlex™

JHeydecke/17Jun2007/ Company Confidential March 08 22007 proprietary material of VARTA Microbattery GmbH

Basic Technology

Basic technologyBasic technology

PoLiFlex™

JHeydecke/17Jun2007/ Company Confidential March 08 32007 proprietary material of VARTA Microbattery GmbH

Basisfolie

Chemical construction and reaction

The lithium-ion rechargeable battery

a bx yz

Electrochemistry

PoLiFlex™

JHeydecke/17Jun2007/ Company Confidential March 08 42007 proprietary material of VARTA Microbattery GmbH

Basisfolie

Chemical construction and reaction

Technology

- Hot-lamination step guarantees a very good

adhesion between:

- current collector and electrode material

- separator and electrode material

Low impedance and very good capacity

over cycling

PoLiFlex™

JHeydecke/17Jun2007/ Company Confidential March 08 52007 proprietary material of VARTA Microbattery GmbH

Basisfolie

Technology

-Most advanced lithium rechargeable technology

-Next generation after Lithium Ion

-High volumetric and gravimetric energy density

-Low swelling (up to 0.3mm for the life of the battery at RT)

-Excellent cycle life

-Excellent discharge rate capability

-Excellent performance even at extreme temperatures

-Excellent performance at 45°C and 60°C

PoLiFlex™

JHeydecke/17Jun2007/ Company Confidential March 08 62007 proprietary material of VARTA Microbattery GmbH

Basisfolie

Benefits of PoLiFlex-Technology

Li-Ion prismatic hard casing

-More weight at similar capacity

-Thickness mostly >5mm

-Liquid electrolyte: may leak and destroy

electronic

-Safety circuit needs additional space

-Electrode coiled: no solid contacts

VARTA PoLiFlexTM

-15-30% less weight (i.e. comp. to steel can)

-Slim: down to 1.5mm (actually)

-Low swelling

-No free liquid electrolyte, no risk of

damage the electronic

-Safe circuit needs no additional

space (incorparated in sealing area)

-Lamination technology: solid contact,

high reliability

PoLiFlex™

JHeydecke/17Jun2007/ Company Confidential March 08 72007 proprietary material of VARTA Microbattery GmbH

Basisfolie

Benefits of PoLiFlex-Technology

VARTA PoLiFlexTM Applications.

All VARTA PoLiFlexTM were produces at plat Ellwangen in series production.

- Apple nano-Ipod (second generation, available from september 2006.

- Biometric Card (Bloomberg)

- Mobile Phone (Siemens/BenQ CF110)

PoLiFlex™

JHeydecke/17Jun2007/ Company Confidential March 08 82007 proprietary material of VARTA Microbattery GmbH

PoLiFlex®-Batterie:2,4 mm

PoLiFlex® for NEW Apple iPod nano, 2th generation, available from sept. 2006

PoLiFlex™

JHeydecke/17Jun2007/ Company Confidential March 08 92007 proprietary material of VARTA Microbattery GmbH

PoLiFlex®-Batterie:2,4 mm flach

Aluminium-Gehäuse:4,5 mm flach (innen)

PoLiFlex® for NEW Apple iPod nano

PoLiFlex™

JHeydecke/17Jun2007/ Company Confidential March 08 102007 proprietary material of VARTA Microbattery GmbH

Basisfolie

Benefits of PoLiFlex-Technology

Biometric Card (Bloomberg)

2,6 mm PoLiFlexTM

inside

PoLiFlex™

JHeydecke/17Jun2007/ Company Confidential March 08 112007 proprietary material of VARTA Microbattery GmbH

Basisfolie

Benefits of PoLiFlex-Technology

VARTA PoLiFlexTM Applications.

All VARTA PoLiFlexTM were produces at plat Ellwangen in series production.

- Apple nano-Ipod (second generation, available from september 2006.

- Biometric Card (Bloomberg)

- Mobile Phone (Siemens/BenQ CF110)

PoLiFlex™

JHeydecke/17Jun2007/ Company Confidential March 08 122007 proprietary material of VARTA Microbattery GmbH

Basisfolie

Siemens Slider-Handy CF110

PoLiFlex Tyoe 44 34 41 ( Flamingo )

PoLiFlex™

JHeydecke/17Jun2007/ Company Confidential March 08 132007 proprietary material of VARTA Microbattery GmbH

Preparation of the electrodes

Casting of electrode films

Slurry

Casting onto carrier film or current collector

PoLiFlex™

JHeydecke/17Jun2007/ Company Confidential March 08 142007 proprietary material of VARTA Microbattery GmbH

Preparation of the electrodes

Hot-Lamination of the electrodes in case of coating onto carrier foil

Electrode slitting

Current collector

Electrode band

Electrode band

PoLiFlex™

JHeydecke/17Jun2007/ Company Confidential March 08 152007 proprietary material of VARTA Microbattery GmbH

Lamination of Bi-cells

Bi-cell

Preslitted electrodes and

separators

Positive

Separator

Negative

Positive

Separator

Connecting by hot lamination

process

PoLiFlex™

JHeydecke/17Jun2007/ Company Confidential March 08 162007 proprietary material of VARTA Microbattery GmbH

Stacking and welding the Bi-cells

Machine making Bi- cells by hot

lamination process

Stacking Bi-cells Cutting Bi- cell current collectrors

and connecting

them by ultrasonic welding

PoLiFlex™

JHeydecke/17Jun2007/ Company Confidential March 08 172007 proprietary material of VARTA Microbattery GmbH

Pouch fabrication

A. Partial cell packaging in

multilayer aluminum foil

B. Pouch activation through

open side with electrolyte which

is completely bound in the stack

SelaledOpen

C. Formation, degassing,

cutting of gas pouch, final sealing and

folding

Gas pouch D. Assembly of PCM

(protection circuit module)

PoLiFlex™

JHeydecke/17Jun2007/ Company Confidential March 08 182007 proprietary material of VARTA Microbattery GmbH

VARTA PoLiFlex™-Batteries are produced with highly automated plant at Ellwangen (Germany)

Modern Production- Technology and Engineering for PoLiFlexTM

Automatic production

PoLiFlex™

JHeydecke/17Jun2007/ Company Confidential March 08 192007 proprietary material of VARTA Microbattery GmbH

BasisfolieBasisfolie

Flexibility of PoLiFlexTM cells

n x

Modular stacking concept

Very flexible range of footprints Different shapes

PoLiFlex™

JHeydecke/17Jun2007/ Company Confidential March 08 202007 proprietary material of VARTA Microbattery GmbH

ThankThank youyou