LithiumIon Battery Char

Report
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 ?

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