Decision-Making on Power Bank Design with Human-Generated Power Using Fuzzy Theory

Thanks to the awareness of carbon reduction and sustainability, there is a growing emphasis on using environmentally friendly renewable energy. Despite the widespread use of renewable energies such as solar and hydropower, their availability is still limited by weather conditions with difficulty in providing electricity stably for a long time. Portable chargers can be used to obtain a power supply owing to technological advancements and improved power generation devices. Through market surveys and a questionnaire survey, we identified the design principles of a power bank. Morphological charts were drawn to illustrate feasible options for components and product images. Five designs were proposed through morphological analysis and were evaluated by experts. The results were assessed with a fuzzy comprehensive evaluation to determine the optimal design.