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IEEE Humanitarian Student Design Competition

IEEE Humanitarian Student Design Competition. Solar Suitcase Energy Storage System Prepared By The Boondocks: Shiva Bhardwaj, Thebe Parsons, Pral Bhojak , Ali Jangda. Why Improve the Electrical Storage System?. Is a major factor of the portability

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IEEE Humanitarian Student Design Competition

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  1. IEEE Humanitarian Student Design Competition Solar Suitcase Energy Storage System Prepared By The Boondocks: Shiva Bhardwaj, Thebe Parsons, PralBhojak, Ali Jangda

  2. Why Improve the Electrical Storage System? • Is a major factor of the portability • The capacity limits the number of applications • Determines the lifetime of the system • Plays a major role in system reliability and efficiency

  3. Lithium Ion vs. Lead AcidComparison

  4. Charging Conditions of Lithium Ion • Constant Voltage • Limiting Charge Current • Monitoring Temperature • Limiting Overcharge Then the question is how do we incorporate these conditions in the current solar suitcase design?

  5. Integrating Lithium Ion Initially considered: • Modifying existing controller hardware But… • Hardware and software are proprietary • Original controller was designed specifically for Lead Acid batteries; modification for Lithium Ion may be impractical

  6. The Free Charge Controller Project • Open source hardware and software • Flexible design that incorporates a microcontroller; allows for customization • Can charge Lithium Ion, Lead Acid, Nickel Cadmium and Nickel Metal Hydride battery types • Large development community, approximately 130 people

  7. Quantitative Comparison between Controllers

  8. Qualitative Comparison between Controllers • Free charge controller is highly customizable and expandable: • Ability to add up to 3 boards for a maximum current throughput of 32 A • Can be designed towards various power applications • Hardware is designed to be easily accessible for testing • Free charge controller has not been tested for reliability yet

  9. Future Improvements and Testing • Including a method to allow for quick changes between storage chemistries • Expanding the current rating for each board • Provide user with feedback • Tests for reliability over operating temperature range, current and voltage range and life expectancy • Test that each battery type is correctly charged

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