For Electric Vehicle Team Members •Pramit Tamrakar- Electrical Engineering •Jimmy Skadal- Electrical Engineering •Hao Wang- Electrical Engineering •Matthew Schulte- Electrical Engineering Advisor •Ayman Fayed Client •Adan Cervantes- Element One Systems Team-id- SdMay11-04 Problem Statement To develop an efficient and safe system for charging and monitoring of multi-cell series batteries in Electric Vehicles by using AC to DC converters. System Specifications Functional Decomposition (Hardware) Functional Decomposition (Software) Functional Requirement Li-Ion Battery Management (90 cells in series) Implement a Constant-Current Constant- Voltage (CCCV) charging procedure Battery Gauging Temperature Monitoring Overcharging Protection Achieve 100 miles range per charge Non-Functional Requirements Generating a 324 VDC power bus for battery charging Designing a circuit capable of generating the 324 VDC power bus form a lower, or a higher voltage source Ensuring safety Constraints and Technology considerations Constraints: The charging process Technology: Three Stages Charging Technology Slow charge stage Fast charge stage Constant voltage charging stage Voltage converter Boost converter circuit MSP430 Microcontroller Constraints: High voltage control Technology: Scaling down by a factor about ten Risk Electric Shock: The risk of electric shock is possible when working with a charging system. System Component Damage: As power is being applied and the charging system is running, the risk of overheating, voltage/current spikes, and incorrect connections are possible. Mitigation Testing and Simulation: To prevent component damage and ensure proper design, the system will be modeled to test for expected results. Low Volt System: With the 16V – 42V scaled down system, the risk a shock is reduced. Smart and Safe: By knowing how to be safe and building the system with human/component safety in mind will aid in avoiding risk. Project Tasks & Schedule Cost Breakdown Questions ?