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December 7 th , 2011

Solar Jackets’ Racer Battery Management System(BMS) Ali Bibonge Daniel Christopher Paul Martin Mark Slade Taverishima Tsegha. December 7 th , 2011. BMS Project Overview. Battery monitoring system for a solar powered race car Maintain batteries in a “safe to operate” and efficient state

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December 7 th , 2011

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  1. Solar Jackets’ Racer Battery Management System(BMS)Ali BibongeDaniel ChristopherPaul MartinMark SladeTaverishima Tsegha December 7th, 2011

  2. BMS Project Overview • Battery monitoring system for a solar powered race car • Maintain batteries in a “safe to operate” and efficient state • For Solar Jackets’ entry into the American/World Solar Challenge • Overall BMS cost of $1200

  3. Proposed Design Objectives • It monitors: • Li-ion cell over/under voltages • Li-ion cell over current • Battery pack overtemperature • Electrically isolate the Li-ion cells • Transmits or receives acquired data via RS-485 to racer systems

  4. Current Design Functionality • It monitors: • Li-ion cell over current • Battery pack overtemperature • Electrically isolate the Li-ion cells • The RS-485 communication component has been incorporated into the BMS PCB and is ready for programming

  5. BMS System Flow Chart

  6. Prototyping

  7. Prototyping

  8. Testing Something here...

  9. Demonstration of Temperature Sensor

  10. Demonstration of Current Sensor

  11. System Development Problems • Programming of the LTC chip for measuring voltages • The LTC chip has been included on the PCB for further programming • Georgia Tech milling machine is broken

  12. Final Budget • Total amount spent is approximately $400 • This covers the electromechanical relay, LM 35 temperature sensors, ACS758 current sensors, DC fuse/fuse holder, and copper bus/connectors

  13. Battery Module and Cell Thresholds

  14. Recommended Future Work • LTC programming • Incorporating the electromechanical relay into the battery box • RS-485 programming • Mounting PCB components

  15. Questions?

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