Battery-Supercapacitor Hybrid System

Design Team TenFinal Presentation

ECE 480 FS08

Evolution of the Battery/Supercapacitor Hybrid System

System 2

System 1 System 3 System 4

- 51.8 Volts

- 5 x 165F Modules

- 905 Farads Total

- 51.8 Volts

- 56 Li-Po Cells

- 4 PCMs

- 51.8 Volts

- 28 Li-Po Cells

- 2 PCMs

- 2 x 165 F Modules

- 330 Farads Total

- 51.8 Volts

- 14 Li-Po Cells

- 1 PCM

- 85 Farads Total

- 3 Solid-State Relays

- 1 Digital Relay Controller

Comparing Systems SystemSystem 2System 1 System 3 System 4

Limitations:- Excessive Weight- High Cost- Low Energy

Estimated Cost:

$9000

Limitations:- Excessive Weight- Low Power- Limited Cycle Life

Estimated Cost:

$5900

Limitations:- Relatively High Cost- Performance Limited by

Voltage Dependency

Estimated Cost:

$7400

Limitations:

- None

Estimated Cost:

$4200

Our Prototype Battery/Supercapacitor Hybrid System

Battery Components

Cells:- Rechargeable Lithium Polymer- 3.7 V Per Cell- 21 Amp/Hours

Protection Circuit Module: - Protects Cells from Overcharge & Overdischarge - Balances Voltages Between Cells- Short Circuit & Reversed Polarity Protection

Battery Specifications

- 14 Cells- 51.8 Volts- Integrated PCM

Super Capacitor Array

- 165 Farads- 48.6 Volts Nominal- Internal Monitoring Circuitry- Cell Balancing Function- High Power Density- 31 lbs

Control System

Solid-State Relays:- Remote Operated Switch- No Moving Parts- Use N-Channel MOSFETS- Rated at 40 Amps & 200

Volts

Programmable Relay Controller:- Controls Timing & Activation of the

Relays- 24 V- Controls Up To 16 Relays

System Schematic

1 Kilowatt Load Specifications

- Two 5Ω Resistors

- 1 kW Rated Each

- Connected In Parallel

- 2.5Ω Circuit

- 6’ x 9” Heatsink