LOW CARBON FOOTPRINT HYBRID BATTERY CHARGER PROJECT PROPOSAL
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1 LOW CARBON FOOTPRINT HYBRID BATTERY CHARGER PROJECT PROPOSAL Students: Blake Kennedy, Phil Thomas Advisors: Dr. Huggins, Mr. Gutschlag, Dr. Irwin Date: December 11, 2007
2 PRESENTATION OUTLINE Project Summary Previous Research Patents and Standards Project Description System High Level Block Diagram Subsystem Description and Specifications Software High Level Block Diagram Datasheet Analytical Evaluations Project Equipment Project Schedule
3 PROJECT SUMMARY Charge a mobile battery for vehicular applications using renewable energy Photovoltaic arrays Wind turbine Develop microcontroller algorithms Three Modes of Operation Emphasize efficient energy collection Minimize utility A.C. energy Store renewable energy in power bank until needed
4 PREVIOUS RESEARCH What has been created by others? Solar powered vehicles Utility A.C. electric vehicles Wind turbine power generation Photovoltaic power generation Wind/Solar hybrid power generation Renewable energy charging a storage bank PWM battery charger
5 APPLICABLE PATENTS Relevant Patents Description Battery charger system for electric vehicles U.S. Patent # with quick charge and safe charge Power system for converting variable source U.S. Patent # power to constant load power U.S. Patent # Electric vehicle battery charger Device for determining the charge condition U.S. Patent # of a battery Battery charging controller for photovoltaic U.S. Patent # array using stationary battery and PWM to provide a constant load Device and method for pulse charging a U.S. Patent # batteryusing PWM for photovoltaic applications.
6 APPLICABLE STANDARDS Relevant Standard IEC IEC IEEE 1013 IEEE UL 2202 UL UL UL Description Photovoltaic (PV) stand-alone systems Design verification Overvoltage Protection for Photovoltaic (PV) Power Generating Systems Recommended Practice for Sizing Lead-Acid Batteries for Stand-Alone Photovoltaic (PV) Systems IEEE Recommended Practice for Sizing Lead-Acid Batteries for Stationary Applications Electric Vehicle Charging System Equipment Personnel Protection Systems for Electric Vehicle (EV) Supply Circuits: General Requirements Personnel Protection Systems for Electric Vehicle (EV) Supply Circuits: Particular Requirements for Protection Devices for Use in Charging Systems Plugs, Receptacles and Couplers for Electric Vehicles IEC- International Electrotechnical Commission
7 PREVIOUS KNOWLEDGE APPLICATION What is new with our project? All of these systems will be combined to charge a vehicle battery Utilization of battery to battery charging
8 HIGH LEVEL SYSTEM BLOCK DIAGRAM Solar Energy Renewable Energy Wind Energy Voltage/Current sense leads Key: = Primary Objective = Extended Objective (if time permits) = Power Flow = Control Signal Stationary Battery Charger Stationary Battery Voltage/Current sense leads AC Energy Select Menu Keypad Max Battery Life (On/Off) Min. Charge Time (On/Off) Battery Charging (On/Off) Percent Battery Full AC to DC converter Mobile Battery Charger Emergency Charge Microcontroller System Power Control System Time Remaining Liquid Crystal Display Mobile Battery Voltage/current sense leads
9 RENEWABLE ENERGY Photovoltaic (P.V.) Energy Provide sufficient energy to charge the mobile battery given sun hours per day May simulate some power with D.C. power supply Plan to use Kyocera KC50T High Efficiency: > 16% Max Power: 54W Competitive Cost
10 RENEWABLE ENERGY Wind Energy Provides 1.2 kwh/day at a height of 50m May simulate some power with D.C. power supply Plan to use Southwest Wind Power Air-X Start up wind speed: 7 M.P.H. Rotor Diameter: 46 in. Max Power: 28 M.P.H Vout= 24VDC Competitive Cost
11 STATIONARY BATTERY CHARGER Integrates wind and P.V. energy to charge stationary battery Must accept max input values Voltage: 24V Current: 42A Output specifications dependent on stationary battery Charges stationary battery to maximize life Charging Scheme to be determined Monitors voltage and current characteristics of renewable energy and stationary battery
12 STATIONARY BATTERY Stores renewable energy to maximize energy collection when mobile battery is not charging Reduces mobile battery charge time Capacity needed determined by: What is practical from cost standpoint Stationary battery decay vs. mobile battery Must be at least 180Wh Battery chemistry to be determined
13 STATIONARY BATTERY Possible battery choices Optima Sealed Lead Li-Ion Ni-CD Ni-MH Lead Acid Acid Temperature Range (C) 130 to to to to to -40 Calendar Life (years)? 2 to 5 2 to 5 2 to 5 2 to 8 Max Charge Cycles to to to 500 Discharge Profile Flat Slope Flat Flat Flat Self Discharge 20C (% /mo) Very Low 2 15 to to 25 4 to 8 Memory Effect No No Yes Yes No Ability to Trickle Charge Yes No Yes Yes Yes Charging Characteristic 2 stage Deep Discharge Yes Yes Yes Yes No Relatively Quick Charge Yes Yes Yes Yes No Constant Voltage Or Current Charge Voltage Voltage Current Current Voltage Relative Expense/ Capacity Cheap Expensive Moderate Moderate Cheap Approx Expense (dollars) 150 <
14 STATIONARY BATTERY Li-Ion Eliminated No Trickle Charge Sealed Lead Acid Eliminated Low charge cycles Ni-Cd eliminated because similar to Ni-MH Ni-MH has less memory effect Ni-MH has higher energy density Optima Lead Acid vs Ni-MH Optima less charge cycles significantly lower cost no memory effect. Conclusion Trade off between charge cycles and cost Will probably choose Optima Lead Acid battery
15 MOBILE BATTERY CHARGER Accepts energy from stationary battery Must accept max input values based on stationary battery specifications Must be capable of outputting Voltage: 14.9V Current: 4.8A The mobile battery charger shall be capable of charging the mobile battery within at least 12 hours
16 MOBILE BATTERY Panasonic LC-RA1212P for Gaucho 12V lead-acid battery Rated capacity: 12Ah Minimal charge time 2 hours 39 minutes Maximum battery life 2-8 years charge cycles Constant Voltage Charge
17 POWER CONTROL SYSTEM
18 POWER CONTROL SYSTEM Power control system switches charging modes of mobile battery charger Three modes of charging Maximum battery life Minimum charge time Emergency charge (Extended Objective) Monitors voltage and current characteristics of stationary battery and mobile battery Operational between 0C and 45C for battery protection
19 POWER CONTROL SYSTEM Power control system is user interface Keypad input User selects mode of charge L.C.D. output Battery charging indicator Battery charge percentage indicator Time remaining until battery charged indicator
20 POWER CONTROL SYSTEM SOFTWARE Microcontroller software necessary for user input/output and switching charger modes Stationary battery charger flowchart:
21 MOBILE BATTERY CHARGER FLOWCHART
22 SYSTEM DATASHEET Minimum Maximum Units Sun Hours KWh/(m^2*day) Wind Speed 7 28 MPH Stationary Battery Capacity Wh Mobile Battery Charger Output Voltage V Mobile Battery Charger Output Current A Temperature 0 45 C Time for mobile battery to charge Hrs
23 ANALYTICAL CALCULATIONS Load Calculation Capacity 12V*12Ah=144Wh 144 W*3600 sec*1.25 = J Solar Power Calculation Efficiency*Area*Sun hours*3600 seconds Maximum Spec 54W= J/hour Worst Case for Chicago = J/day Worst Case Number of Solar Modules J/ J= P.V. Modules
24 ANALYTICAL CALCULATIONS Load Calculation Capacity 12V*12Ah=144Wh 144 W*3600 sec*1.25 = 648,000 J Wind Power 12 M.P.H. 1.2 kwh/day 12 M.P.H. 4,320,000 J/day generated Average in Peoria, IL M.P.H.
25 EQUIPMENT LIST Equipment Quantity Estimated Unit Cost Estimated Total Cost Kyocera KC50T Photovoltaic Module 3 $ $ Southwest Wind Company 400W Air-X Wind Turbine 1 $ $ Mast for Wind Turbine 1 $ $ Optima D35 Lead-Acid Battery 1 $ $ Micropac535 Development Board 1 $0.00 $0.00 Total: $1, Power electronics will be purchased after schematic finalization.
26 Ghantt Chart Charger Scheme Research Charger Scheme Research Pspice/MATLAB Simulations Pspice/MATLAB Simulations Mobile Battery Charger Mobile Battery Charger Controller Software Design Stationary Battery Charger Stationary Battery Charger Spring Break March Stationary Battery Charger Stationary Battery Charger Renewable Energy Source Integration Renewable Energy Source Integration Testing Testing Presentation/Report Preparation Presentation/Report Preparation Days: Blake Phil
27 QUESTIONS?
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