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Brendan Flood, Gerard deBlasi, John Fedak IV Lafayette College
Formula Electric Vehicle - Energy Storage, Control, and Management System Brendan Flood, Gerard deBlasi, John Fedak IV Lafayette College
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Presentation Outline Introduction System Overview Energy Storage
Cell Packaging Battery Management System (BMS) Control and Management Pit Station System Control and Data Acquisition (SCADA) Safety Loop Conclusion
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Presentation Outline Introduction System Overview Energy Storage
Cell Packaging Battery Management System (BMS) Control and Management Pit Station System Control and Data Acquisition (SCADA) Safety Loop Conclusion
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Introduction: Motivation
Design a system for Formula Hybrid competition Electric Vehicle category Focus on modularity Can be used in any application that requires energy storage and control
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Introduction: SAE Formula Hybrid Competition
Focuses on both performance and efficiency of designs Events: Endurance Sprint Autocross
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Introduction: Simulation Results
Endurance Expect continuous current of ~200A Aggressive driving will drain the battery Sprint Expect peak currents of ~600A Finish race in 6-8 seconds Typical times: 4-9 seconds
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Presentation Outline Introduction System Overview Energy Storage
Cell Packaging Battery Management System (BMS) Control and Management Pit Station System Control and Data Acquisition (SCADA) Safety Loop Conclusion
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System Overview: Basic Functions
Store & discharge energy Implement management and cell balancing Control system states Display information Define and implement serial communication between subsystems Provide safety measures
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LFEV-ESCM: Overview Two configurations Discharge
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LFEV-ESCM: Overview Two configurations Charge
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Presentation Outline Introduction System Overview Energy Storage
Cell Packaging Battery Management System (BMS) Control and Management Pit Station System Control and Data Acquisition (SCADA) Safety Loop Conclusion
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Cell Packaging: Overview
Secures cells and BMS Provides safety measures Isolation relays & fusing Initially developing and testing a three-cell pack Later integrating full seven-cell pack
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Presentation Outline Introduction System Overview Energy Storage
Cell Packaging Battery Management System (BMS) Control and Management Pit Station System Control and Data Acquisition (SCADA) Safety Loop Conclusion
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BMS: Overview Monitors the following (per cell): Communicates with:
Voltage Temperature Current Communicates with: SCADA Pit Station Controls bypass circuit
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Presentation Outline Introduction System Overview Energy Storage
Cell Packaging Battery Management System (BMS) Control and Management Pit Station System Control and Data Acquisition (SCADA) Safety Loop Conclusion
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Pit Station: Overview Charge a pack Manage cells during charging
Enable/disable bypass Log data Display status to the user
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Pit Station: Cell Balancing
Cell balancing brings cell’s charge levels into alignment Used to: Extend lifetime of cells Improve health over lifetime Increase accuracy of State of Charge calculations
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Presentation Outline Introduction System Overview Energy Storage
Cell Packaging Battery Management System (BMS) Control and Management Pit Station System Control and Data Acquisition (SCADA) Safety Loop Conclusion
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Monitors and controls:
SCADA: Overview Monitors and controls: Cells (via BMS) System states Safety Loop Load Controller Isolation Relays Log system data
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SCADA: Safety Functions
Decides when parameters are out of bounds Cell over voltage threshold, temperature threshold, etc. Controls final connection to the load Sends a signal to close the Load Controller Isolation Relays (IRs) when user presses a button
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Presentation Outline Introduction System Overview Energy Storage
Cell Packaging Battery Management System (BMS) Control and Management Pit Station System Control and Data Acquisition Safety Loop Conclusion
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Safety Loop: Overview Function How
Shut down the system in case of an emergency or malfunction How Accumulator Isolation Relays (AIRs) in the battery pack
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Emergency Stop Buttons
Safety Loop: Overview Safety Box Safety Loop Power Emergency Stop Buttons SCADA Packs Load Controller AIRs The Loop: Starts at the Safety Box 3 Emergency Stop Buttons Brake over-travel switch SCADA Packs Load Controller Cap to connect loop
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Safety Loop: System Connections
Discharge
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Presentation Outline Introduction System Overview Energy Storage
Cell Packaging Battery Management System (BMS) Control and Management Pit Station System Control and Data Acquisition (SCADA) Safety Loop Conclusion
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Conclusion: LFEV-ESCM
System for storing and managing energy Directed at EV applications Important subsystems: Battery pack SCADA & Pit Station Safety loop
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Conclusion: LFEV-ESCM
The LFEV-ESCM team thanks you for your time!
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