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Transcript
ONR HEV HMMWV Team Assault and Battery Team Members: Linnea Anderson, Bryan Blakley, Matthew Braley, Danny George, Slade Klein, Chad Schierman, Matt Shaw, Albert Whetstone Team Advisors: Steve Beyerlein, Herb Hess Team Mentors: Brice Quirl, Yu-Chen Lu 1 Outline Background Overview of Project Current State of Affairs Electrical Systems Mechanical Systems Design Options Work Schedule Budget Conclusion 2 Background Team Assault and Battery has received a military grade HMMWV from the U.S. Marines that has been previously converted to a Hybrid Electric Vehicle (HEV). It is currently in a non-running condition due to various subsystem conflicts and possible issues with non-working parts. The focus will be to unify the electric bus to 360V. The next focus is to install monitors and thermal controls to test the performance of the next generation of lead-acid batteries that are currently in development. This will require the implementation of an advanced control and display system. Also we will be working to incorporate aspects of regenerative braking control and advanced battery management systems. The HMMWV will have operational characteristics as close to those of a normal HMMWV as possible. 3 Needs-Specifications Get the HMMWV self propelled Unify the battery bus to 360 VDC Regulate the battery box to 100±20 °F Instrument the battery pack and vehicle 4 Current State of Affairs Electronics submersed for an extended period of time Unknown condition of power plant/ engine 24 VDC system requires upgrading No documentation for current systems 5 Current State of Affairs 6 Overview CAN 2.0 Bus Communications Drive Power Signals AC 150 PEU 360 VDC Inverter Regen Power Plant 360V 360 VDC Drive Motor Thermal Managment Control Monitoring Battery Pack 360V Nominal 360 VDC for Auxiliary Power Data Acquisition Signals Monitor and Control Sensors DC/DC converter Data Acquisition System Driver Information Control/Management Data Acquisistion Signals Sensors 12 VDC Auxiliary System 24 VDC Auxiliary system 12 VDC Rail 24 VDC Rail 24 VDC 7 Electrical Systems Battery Pack Battery Pack Thermal Management Individual Voltage Individual Temp Pack Current Temp Heater control Aux Power Pedal Positions Throttle and Brake Mux or Signal Conditioning Voltage Current Temp Driver Information Data Acquisition System Data Storage Driver Interface SOC Engine RPM Water Temp Driver Input Reset Etc. Drive Position Forward Reverse Neutral AC 150 Main Bus Voltage ~360V Nominal Outputs Current Voltage Regenerative variance Etc. 8 Electrical Systems Instrumentation Alternative 1 – Microcontroller Based Pros: Less initial cost Distributed computing Task specific Low power Cons: Extensive development time Expandability issues Task Specific Exponential learning curve 9 Electrical Systems Instrumentation Alternative 2 – NI PXI Based Pros: Ready to connect Low development time Highly reconfigurable Extremely expandable Graphical interface capable Cons: Larger initial cost No sleep mode 10 Electrical Systems Power distribution Buck converter 12V Auxiliary Batteries Vehicle auxiliary systems 11 Electrical Systems Alternator AC 150 integration Starting circuit Inputs CAN bus Thermal Management Monitor Control 12 Battery Box Configuration Substitute Batteries 13 Battery Box Configuration Advanced Lead Acid Batteries 14 Thermal Management Alternative 1 – Fans and Blankets Pros: Distributed heat source Not dependent on APU for heat source Quick response time Location specific heating Low maintenance Cons: Moderate power consumption No active cooling 15 Thermal Management Alternative 2 – Engine Heat Transfer Pros: Readily Available Recaptures otherwise lost energy Cons: Engine must be operating Slower response time Less temperature gradient control 16 Motor Mounting Requires Battery Box Modification Fabrication of Mechanical Adapters Environmental protection Torque control Gear reduction 17 Work Schedule 18 Budget Item subcategory Estimated Actual Proposed propulsion system $30,000.00 AC 150 Retrofit Gear Redux $5,000.00 $200.00 Thermal management (Battery Box) radiator water pump tubing radiator fans heat pads Thermal Blankets $320.00 $90.00 $100.00 $150.00 $4,000.00 $244.00 Batteries commercial $1,600.00 Battery Management System Battery Box Modification materials $700.00 Instrumentation NI PXI chassis Touch Screen display $18,000.00 $500.00 Power distrobution DCDC $1,661.00 Cableing Connectors $1,000.00 $1,000.00 Incidentals total in total out difference $30,000.00 $34,565.00 $4,565.00 19 Conclusion Background Overview of Project Current State of Affairs Electrical Systems Mechanical Systems Design Options Work Schedule Budget 20 Questions? 21 Team Photograph 22