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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

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 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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