A presentation about lightweight Lithium battery for electric-powered applications.

1. Dong Guan Guang Cheng Electronic Co. Ltd.
www.gce-polarbear.com

2. Mission
At GCE, we have one simple goal and one simple technology:
To build a 100%-green battery that is able to replace fossil fuel
–powered engine and environmentally hazardous lead-acid
battery.
To build a high performance, light-weight battery with robust
charging and discharging systems in order to truly deliver the
advantages of a multiple-cell phosphate battery pack.

3. Why LiFePO4 Battery?
[The Advantages of LiFePO4 Battery]
Safety and Eco-Friendly
Li-Phosphate material has much better thermo-resistance
capability; does not explode under extreme conditions. It
has complete Eco-Friendly chemistry vs. poisonous Lead-
Acid and Ni-MH.
Performance and Stability
Much higher instantaneous power output than conventional
batteries. Capacity of a multi-cell 48V battery (with 32 10Ah
cells) tested showed more than 90% remains after 300+
life-cycles. Estimated capacity after 1000 life-cycles is 70%.
These battery life-cycles are about 5 years in normal
operation for a 48V electric motorcycle.
Cost-Effective
Much cost-effective comparing with conventional battery in
terms of costs of expensive controller system and
professional maintenance tasks.

4. Features and Chemistry Comparison
Battery Type Lead-Acid Lithium Cobalt Lithium Manganese Lithium Phosphate
Cell Voltage 2 3.7 3.7 3.2
Watts/kg Ratio 30-45 110-150 110-150 140-190
Watts/Dimension 50-100 350-450 250-350 100-150
Life-Cycles 300-500 500-1000 500-1000 1000-2000
Self-Discharge/Month 4-5% <5% <5% <3%
Memory Effect High None None None
Protections Required Required Optional
Over-Charge/Discharge Not Required (Must installed for (Must installed for (Better life-cycle
Over-Current, Safety) Safety) and performance)
Short Circuit (S.C.)
Fast Charging &
No Acceptable Acceptable Good
Discharging
Operation <0℃ >55℃ or <-20℃ >50℃ -20℃-60℃
Temperature No or Low Output No or Low Output No or Very Low Output Normal Output
Good Worst Bad Best
Safety S.C.- Explosive @ Fire/Explosion @ Fire/Explosion @ No Explosion
High Temp. High Temp. High Temp. No Fire
Ecological High Pollution
No Pollution No Pollution No Pollution
Lead / Sulfate Acid
Economical Good Better Good Good going to Best

5. Applications
Polar Bear’s Focus
● Electric Motorcycles
● Electric Gardening Tools
● Light Farming Machines
[Business Focus] [Product Attributes: Safety & Mobility]
General Applications
• EV – E-Bike, Electric Motorcycle,
Electric Scooter, Electric Car, Hybrid
Car, Golf Cart, Electric Boat, Mobile Aides
• Gardening – Electric Tiller, Lawn
Mower, Electric Chain Saw, Trimmer.
• Utilities – Forklift, Snow Remover
• Renewable Energy Storage - Solar, Wind

6. Current Product Line
12V: 5Ah, 7.5Ah and 10Ah
24V: 5Ah, 7.5Ah and 10Ah
36V: 7.5Ah, 10Ah and 20Ah
48V: 7.5Ah, 20Ah and 40Ah
Polar Bear Power Batteries feature
robust safety designs with built-in BMS
providing protections against:
a. Over-Charging b. Over-Discharging
c. Over-Current d. Short-Circuit
The advanced built-in BMS with ICMS(Individual Cell
Monitoring System) uses individual control IC to
accurately monitor charging and discharging voltage at
each cell in order to keep the best of capacity balance
for all cells, which greatly optimize the performance of a
multi-cell LiFePO4 battery pack.

7. Polar Bear Technologies
Technology for Efficient Cell Balance
The essential of Cell Balance Management is the
capability in keeping high capacity and performance
of a battery after long-term operation. Our BMS starts
at the beginning of battery cell testing and matching,
not after the assembly of a battery.
Technology for Real-World Performance
With the advanced built-in BMS featuring
ICMS(Individual Cell Monitoring System) design,
robust protections are assured at any operation
condition. Discharging is promptly activated at right
time with right amount of power needed at operation. • Nano-Grade Processed Cells
No energy is wasted.
• 98% +/- 2% at first 130 Life-Cycles
• <15% Cap. Decreasing aft 800 LCs
Technology for Cost-Effectiveness
Instead of using expensive components on • Built-in Auto Cell Monitoring BMS
complicate circuit boards, we invested in Cell Testing • Longer Operational Discharging
and Matching Process to optimize the balance • Complete Cell Protections
system. Simplicity is the idea to design a logical BMS
for practical and cost-effective application.

8. Cell Testing Technology
[Cell Matching and Balance System]
Cell Chemistry Capacity Cell Resistance
Stabilizing Sorting Measurement
Module Voltage Sorting Back-Draw
Assembly & Cell Matching Voltage Testing
Cell Current Cell Balance
Measurement Initialization

9. Technology in Production
[Innovative Quality Assurance]
Quality-Oriented Designs
1. Protection Boards
Module Voltage Run-Card Short-Circuit 2. Production Process
Measurement Recording Prevention 3. Testing Process
Charging/
Full-Function Capacity Balance Discharging Test
Testing & OQC Measurement
Over-Current Output Current
Protection Test Test

10. ODM Capability
[Vertical and Virtual Integration]
Power Product Supply
System Analysis Chain
Analysis Integration
Mechanical
BMS & & Electrical
Power System Integration Safety,
Design Functionality
& Form
Quality &
Performance Manufacturing
& Cost Battery Design Technology
Effectiveness
Total
Efficiency
Analysis

11. Product Demo 1
[ISEKI 24V10Ah Electric Tiller]
Simple
Just hold the start handle to operate the
tiller and release to stop.
Light
The total weight is well under 21kg for
the tiller and just 2.7kg for the battery.
Quiet
No loud engine noise. A neighbor-
friendly advantage let you enjoy the
nature more.
Safe
An AC 300W output supplies sufficient
power for desire operation time while
safety features are well designed
electrically and mechanically.
Healthy and Clean
No air pollution. No bad smell
when storing in garage or in a
car for delivery.

12. Product Demo 2
[Kentfa 48V20Ah Electric Motorcycle]
UL-Certified Safety
Not only the body mechanism but also the battery electricity
are certified by UL, passing numeric strict safety tests.
Powerful
Polar Bear Battery provides this bike with 650W output for
up to 12 degrees of uphill ride. It’s easy to enjoy up to a
60KM of riding with a top speed at 45Km per hour.
Eco-Friendly
No air pollution, no gas-exhaust
smell. A fine act to reduce global
warming and acid-rain. You actually
can save money to save the globe.
Economical
Low cost in long-term owner-
ship, only $0.6 cent per mile in
mileage cost, according to public
utility charge in Taiwan. Much
less cost in mechanical
maintenance; and no cost in
frequent oil-change services.

13. About
About The Company
GCE was founded in 2006 with a 7500m² facility site located in Chang-An Town,
Dong Guan City, Guang Dong Province; about 40 min. of driving distance from
HK. GCE had an initial capital of US$10,000,000. The annual revenue averaged
US$4,000,000 in 2009 and 2010; and expected US$15,000,000 in 2010.
Production Capability
Current production capacity at GCE is 60K of 24V10Ah and 36K Employee Distribution
of 48V20Ah Lithium Phosphate Batteries per year, totaling 48.4M Administration Staffs 16%
R&D Engineers 12%
watts-h per year.
Production Engineers 8%
Production Operators 64%
Production Equipment & Technologies
For quality and safety assurance of a battery, GCE itself is
equipped with 2 SMT lines, 2 DIP lines for BMS PCB
assembly; and vibration, temperature/humidity
testing equipments. GCE’s engineers also
developed many innovative equipments for cell
testing and matching process. These production
technologies were based on years of battery making
experience from many top professionals in battery industry.
These industry first-seen techniques include Automatic
Cell Balance Initialization, Automatic Capacity Measurement,
BMS Circuit Testing and Energy-Saving Charging System.

14. Thank You
For more product information,
please visit our web site at:
www.gce-polarbear.com