1. Solar-Powered Mobile Power Station (MPS)
Team:
Brad Jensen
Will Klema
Nate Schares
Client:
PowerFilm, Inc.
Advisor:
Dr. Ayman Fayed

2. Conceptual Diagram:

3. Use-Case Scenario: Military: Commercial:
Individual Soldier Power Source
Charge Laptop, GPS, etc.
Commercial:
Camping/Remote Destination
Personal electronics charging

4. Functional Requirements
Optimized for standard Solar Panel input – 15V (60W) Amorphous Silicon Panel
100W minimum Lithium-Ion battery capacity
12V DC input (with AC-DC Adapter)
Outputs:
5V USB output (USB 2.0 output)
12V DC output
120V AC output with switch
Circuitry must be able to function in a temperature range of -25° C and 60°C
Charging LED Indicators/state of charge indicators
MPPT Charge controller with rating of up to 200W 15V – PowerFilm Solar Quad)
Charge Balancing Circuitry to keep Li-Ion Batteries balanced to prevent over or under charging
Temperature sensor for batteries with alarm LED
Achieve 80% or greater efficiency on all outputs

5. Non-Functional Requirements
The MPS shall be designed mainly for military soldier use
The MPS should also be designed with options for commercial use
The unit should have a weight of less than 5 pounds
Unit should be manufactured for a cost of under $500 per unit
The unit should easily fit inside a military backpack

6. Tasks Breakdown
Spring, 2010
FYI: Built with Microsoft Project

7. Tasks Breakdown
Fall, 2010
FYI: Built with Microsoft Project

8. Cost Estimate

9. Potential Risks and Mitigation
Overheating
AC Inverter
Climate Conditions
Battery Charging
Electrical Shock
AC Voltage
Overcharging Li-Ion Batteries
Hydrogen gas build up
Explosions
Li-ion very sensitive to overcharge.
Mitigation
AC Circuit Breaker
Monitor Battery Temp.
Charge Balancer