Utility Evaluation And Value-Innovation Research Of External-Power-Supply Solution For Mobile Communication Terminals

Represented by smart phones and tablets, mobile communication terminals havebeen bringing profound changes to the way people communicate each other and getaccess to information. The existing mobile communication terminals widely useinternal lithium batteries. The using time of mobile terminal is unsatisfactory due tothe limited energy density of lithium battery and the increasing power consumption.Therefore users need an external power supply for electric energy supplement.Exceptthe mobile equipment standard accessories charger, existing mobile terminal externalpower supply solutions include backup battery, charging dock, wireless charging,mobile power supply, etc.As a beginning, the dissertation briefly introduces the technical principle,development history and the future trend of the above solutions. Then brings in theconcept of demand and utility, and segment the using situations of mobile terminalsinto three levels according to the using behavior: base situation, desktop situation andoutdoor situation; Furthermore, the dissertation defines and classifies the requirementlevels of the mobile terminals using time and the objective utility of kinds of solutionsmeeting the above requirement。After that, the dissertation expands the intention andextension of utility such as security, easy access and optionality, charging rate,capacity, operation convenience, and the cultural heritage. And then evaluates theutility of typical mobile terminal external power supply solutions in different usingsituations on the basis of the theory of cardinal utility and ordinal utility theory.On the base of utility evaluation, aiming at the convenient using experience ofwireless charging solution but abandoning its weakness of high-cost, the dissertationdiscusses a low-cost, convenient and fast mobile terminal external power supplysolution，using the basic principle of value engineering and tools.