Bike Charge Stephanie Dalquist MAS.863 Final presentation 17 December 2001

Introduction Rechargeable batteries Available worldwide Reduces waste and long term cost of battery usage Expensive Energy from bicycle Already used for blinkers, accessories

Market Where bicycles are popular Quantity, distance, frequency of use Appropriate for rural and city use Appropriate for developing and developed areas

Market: China Of 1500 million bicycles worldwide, 470 million in China Chosen for cost, space concerns $1800 per capita income Maybe enough to live on, but extra costs add up fast

Fabrication: Battery Storage Robust circuit Drives current through batteries LED lit when battery charged Vacuum formed PET and ABS storage Durable Tight seal

Fabrication: Motor Housing Motor acts as induction generator Attached above front wheel by clamp ABS housing for protection

Fabrication: Synthesis Storage on handlebars Motor at front wheel One small wire between the two

Costs At retail, material costs: $1Battery pack $8Motor $1Enclosure $2Miscellaneous $13Total Lessen costs in bulk, less manufacturing capital Product could be sold around $16

Further Improvements Higher efficiency for faster charge Improved motor housing and attachments for durability and protection Exploration of different places for parts Fewer manufacturing techniques for easier, cheaper construction Lower cost, with more locally crafted parts Availability of different common sizes

Resources Bicycles in Beijing, China World Factbook, World Resources Rechargeable Battery Market How Batteries Work Power from Bicycles