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Self Charging Gadgets

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Presentation on the idea of self charging gadgets. Team Teknovates was one of the top 10 teams from India to present in the finals of IBM Technology Web Contest 2011. Visit http://www.rishidua.com/self-charging-gadgets-ibm-technical-web-contest/ for more information.

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Self Charging Gadgets

  1. 1. Self Charging Gadgets Rishi Dua, Harsh Parikh Team Teknovates, IIT Delhi IBM Technology Web Contest 2011 Supervisor: Dr. Shouri Chatterjee Rishi, Harsh (Team Teknovates, IIT Delhi) Self Charging Gadgets 1 / 7
  2. 2. Self Charging Gadgets Introduction When we press a key on our mobile phone, a part of the energy we apply is used to press the key and most of it gets dissipated. The essence of self-charging gadgets lies in the fact that they would capture this energy using a piezoelectric layer and use it to charge the gadget that we are using. Rishi, Harsh (Team Teknovates, IIT Delhi) Self Charging Gadgets 2 / 7
  3. 3. Self Charging Gadgets Introduction Piezoelectric materials are materials that physically deform in the presence of an electric
  4. 4. eld, or conversely, produce an electrical charge when mechanically deformed. This eect is due to the spontaneous separation of charge within certain crystal structures under the right conditions producing an electric dipole. Rishi, Harsh (Team Teknovates, IIT Delhi) Self Charging Gadgets 3 / 7
  5. 5. Self Charging Gadgets Working A thin piezoelectric layer is
  6. 6. tted below the keypad of the gadget (like a mobile phone) When we press the button of the gadget, mechanical stress is produced in the piezoelectric material. Due to this stress, electric potential dierence is generated. Thus this Voltage is used to Charge the gadget. This helps sustaining battery for long time and also may eliminate the need of chargers. Rishi, Harsh (Team Teknovates, IIT Delhi) Self Charging Gadgets 4 / 7
  7. 7. Self Charging Gadgets Working A thin piezoelectric layer is
  8. 8. tted below the keypad of the gadget (like a mobile phone) When we press the button of the gadget, mechanical stress is produced in the piezoelectric material. Due to this stress, electric potential dierence is generated. Thus this Voltage is used to Charge the gadget. This helps sustaining battery for long time and also may eliminate the need of chargers. Rishi, Harsh (Team Teknovates, IIT Delhi) Self Charging Gadgets 5 / 7
  9. 9. Self Charging Gadgets Advantages of using piezoelectric substances No external source required. Charge gadget purely on the basis of our Mechanical Force Voltages of 2 to 10 volts, sucient to charge the gadget No need for mechanical limit stops. Can be designed to exhibit very little mechanical damping Highest energy density compared to any other method of charging that we could possibly imagine like solar energy, temperature variations etc. No device replacement: Existing mobile phones can be
  10. 10. tted with a piezoelectric layer. The self-charging gadget helps by increasing battery time duration. Cost eective: PZT is cheap and easily available. Environment friendly, as it helps saving electricity. Rishi, Harsh (Team Teknovates, IIT Delhi) Self Charging Gadgets 6 / 7
  11. 11. Self Charging Gadgets Feasibility and Cost Analysis Instead of PZT bulk, use PZT thin
  12. 12. lms. We arranged the PZT thin
  13. 13. lms one on top of other with metallic layers in between so that the Voltage generated by each layer adds up and thus sucient voltage is available to charge the gadget. PZT is cheaply available and 1000s of PZT
  14. 14. lms can be made easily by mechanical hydraulic presses in any laboratory, just as we made it in Ceramics Laboratory. The marginal cost it would add to the current price of mobile phones is negligible compared to the utility and energy-savings it would provide. Acoustic noise and Temperature dierence do not provide sucient energy and solar charging is a costly alternative. Piezoelectric charging provides the highest energy density. Rishi, Harsh (Team Teknovates, IIT Delhi) Self Charging Gadgets 7 / 7

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