ELECTRIC DRIVETRAIN & PERIPHERIALS BATTERY & BATTERY MANAGEMENT SYSTEM 48 lithium ion Samsung INR18650 cells. The cells are connected 4 in parallel 12 in series giving a battery output of 43.2V and 4.32 Ahr. Orion BMS Jr. equipped with cell over-voltage, under- voltage, over-current, and over-temperature protection. It also actively balances cells when charging. POWER DISTRIBUTION SYSTEM The vehicle power distribution delivers energy to the system components only when instructed and safe to do so. Each individual component of the power system is fused for overload and short circuit protection. VEHICLE COMMUNCATION Communication between modules allow data transfer. This allows for real time feedback from motor controller and BMS to be displayed on the steering mounted OLED screen. Micro SD data logging at rear of vehicle with benefits of optimising both driver and vehicle efficiency. VEHICLE GEARBOX Power transfer between motor and wheel requires a 12:1 reduction. The motor, which spins up to 6000 rpm must give a peak torque of 30 Nm at the wheel. Two stages of roller chain reduction are used for an efficient, compact drive system. SYSTEM PERIHEPRALS Several electrical peripherals are required to meet competition technical inspection and to emulate current on-road vehicles. Full lighting system including headlights, indicators, and brake lights. Functioning windscreen wiper system. High tone car horn. The switching of these functions are positioned on a quick release steering wheel along with the dead-man switch and emergency stop. PROJECT OUTLINE: The Shell Eco-marathon challenges young engineers from around the world to design, build, and drive energy-efficient vehicles. Our vehicle will compete at the Shell Eco-Marathon in March 2017. MOTOR CONTROLLER For efficient electric propulsion, a Brushless DC motor from Scorpion Power Systems was selected. Features of the motor controller include: Texas Instruments InstaSPIN-FOC Texas Instruments TMS320F28027F 32-bit microcontroller I2C communication Very low Rds(ON) MOSFETS (<2 mΩ) PROJECT OUTCOME: Vehicle is electrically fully operational. Construction of vehicle chassis in progress by mechanical team. Further testing and optimisation required over the summer in preparation for the 2017 competition. ELECTRICAL PROJECT TEAM: Byron Engler Jack Hendrikz Frank Sullivan Cam Thompson PROJECT SUPERVISORS: Dr. Patrick Geoghegan Dr. Andrew Lapthorn Bruce Robertson 2 5 4 3 1 6 1 2 3 4 5 6