1. 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

2. Project Goals and System Diagram  Design a Lithium Ion Battery Charger that is capable of safely charging 16 parallel packs of 90 cells in series.  Successfully build a small scale 18 cell charger that is capable of monitoring and balancing the scaled down system.

3. MSP430 Launch PadBuck Circuit Bq76pl536EVM-3 Evaluation module For battery management

4. Functional Decomposition (Hardware)

5. Functional Decomposition (Software)

6. UCC28019AEVM Boost Circuit  Will supply the needed maximum 324 volts to the buck circuit for the large scale charger  350 W Power Factor Correction (PFC) boost converter  390 VDC regulated output  0.9 A of load current  Advanced fault protection

7. Buck circuit and Feedback Loop  The buck circuit will take the voltage generated by the boost buck down to cells  The negative feedback loop  Negative feedback tends to compare actual voltage with desired voltage and seeks to reduce the difference Scaled down buck circuit Inductor100uH Capacitor330uF Value of components

8. Battery Management System  Texas Instruments bq76PL536EVM-3 and MSP430 microcontroller to monitor and regulate the Li-Ion batteries and send information packet to the processor.

9. Battery Management System  Programming using C and WinGUI  Use SPI with an MSP430 to gather the data and make decisions based on battery status

10.  Implementation of the bq76pl536 with 6 series cells in each

11. Test Plan  Subsystem test: Boost Converter System DC supply Buck Converter All necessary voltages and currents Battery Management System communication USB-SPI Processing GUI  Integration Test (scaled down): 18 cell charge/discharge 32.4V-72V CC, 72V CV until 0.3A to batteries

12. Schedule Progress

13. Cost Breakdown ItemW/O LaborWith Labor Parts and Materials: a. Previous school sessions$402.51 b. Printed Circuit Boards$50.00 c. Discrete components$100.00 d. Texas Instruments ICs$0 e. TI PFC boost converter$50.00 f. MSP430 programming board$150.00 Subtotal:$752.51 Test and Build equipment a. oscilloscope, function generator, digital multimeter, PSU$0 b. soldering equipment$0 Subtotal:$0 Labor at $20.00/hour: a. Previous school sessions$28,000 b. Hao Wang$4,000 c. Pramit Tamrakar$4,000 d. Matt Schulte$4,000 e. Jimmy Skadal$4,000 Subtotal:$0$44,000 Texas Instruments endowment:($200) Total:$552.51$88,752.51

14. Questions ?