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Title : Intelligent battery charger

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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  1. Title : Intelligent battery charger Supervisor : Maeve Duffy Student : Noel Walsh

  2. 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.

  3. Introduction • Variation in chemistries is to allow a choice for their customers based on • Cost • Capacity • Why Back-up battery is required.

  4. 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

  5. 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

  6. Research • Software Required • Eagle : Schematic and Layout. • Pspice : test and simulation. • Microcontroller development environment.

  7. Project Timetable

  8. Project Timetable

  9. 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

  10. 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.

  11. Project Outline • Test Prototype for each charging algorithm. • Create production board in eagle layout. • Debug production board. • Test with R:COM system.

  12. 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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