Title intelligent battery charger
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Title : Intelligent battery charger. Supervisor : Maeve Duffy Student : Noel Walsh. Introduction. The project was a proposal from the PEP program carried out at Blue Tree. The Proposal : Intelligent Back-up Battery charger attached to a Dry trailer system. The circuit is expected to :

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Title : Intelligent battery charger

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Title intelligent battery charger

Title : Intelligent battery charger

Supervisor : Maeve Duffy

Student : Noel Walsh


Introduction

Introduction

  • The project was a proposal from the PEP program carried out at Blue Tree.

  • The Proposal : Intelligent Back-up Battery charger attached to a Dry trailer system.

  • The circuit is expected to :

    • Integrate with the R:COM system

    • Provide an interface to the tractor’s power source (Battery) when the unit is attached.

  • The charger circuitry must provide a degree of intelligence to determine

    • Is power source attached from tractor unit

    • Type of battery chemistry in back-up battery

    • Charging algorithm required for back-up battery

    • Safe voltage, current and temperature levels.


Introduction1

Introduction

  • Variation in chemistries is to allow a choice for their customers based on

    • Cost

    • Capacity

  • Why Back-up battery is required.


Research

Research

  • Battery chemistries: (Initially)

    • 20Ah Sealed Lead Acid ( 6 cells -> 12v) Panasonic

    • 2Ah Lithium Ion (3 cells -> 11.1v) Worley-Parsons

  • Battery chemistries: (development)

    • Nickel Cadmium

  • R:COM Power requirements:

    • Input voltage operates between 11v to 24v (buck converter at input)

    • Normal mode -> 2W

    • Sleep Mode


Research1

Research

  • R:COM system is available in USA and Europe

    • USA tractor unit battery -> 12v

    • Europe Tractor unit battery -> 24v

    • Switch mode converter required.

  • Charging Algorithms:

    • When to begin a charge cycle

    • Monitor process, voltage, current and temperature.

    • Finishing a charge cycle

  • Hardware Components:

    • Operating Conditions

    • Safety issues


Research2

Research

  • Software Required

    • Eagle : Schematic and Layout.

    • Pspice : test and simulation.

    • Microcontroller development environment.


Project timetable

Project Timetable


Project timetable1

Project Timetable


Project outline

Project Outline

  • Research battery chemistries and charging algorithms

    • Lead Acid

    • Lithium-Polymer

    • Nickel Cadmium

  • Outline the requirements and functionality of system.

    • Power requirements of R:COM system and connections

    • Monitor Voltage, Current and Temperature

    • Interface with tractor power source

    • Monitor back-up battery charge.

  • Decide and source hardware components.

    • Microcontroller

    • Operating conditions for each part


Project outline1

Project Outline

  • Analyse and simulate charging algorithms.

    • Properties of battery chemistries

    • Determine when to charge back-up battery, monitor the process and when to stop.

    • Simulate with Pspice

  • Design Schematic using Eagle.

  • Prototype the hardware.

    • Test design

  • Write firmware for microcontroller.

    • C programming language

    • Control charging process and monitor V,I and temp.


Project outline2

Project Outline

  • Test Prototype for each charging algorithm.

  • Create production board in eagle layout.

  • Debug production board.

  • Test with R:COM system.


Expected outcomes

Expected Outcomes

  • Develop a good understanding of battery re-charging circuits.

  • Experience with hardware and software

    • High level of control required from both elements

  • Research and analyse information/data.

  • Standard expected for a commercial design.


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