Constant　current　(CC)　and　constant　voltage　(CV)　charging　are　two　charging　stages　for　li-ion　batteries　in　an　electric　vehicle　wireless　charging　system.　Based　on　the　three-coil　structure,　this　letter　proposes　a　novel　reconfigurable　topology　to　achieve　CC　and　CV　charging.　The　transmitting　coil　is　split　into　two　windings　with　one　winding　having　a　turn　number　much　smaller　than　the　other.　The　two　windings　are　fully　compensated　and　connected　to　the　corresponding　inverter　phase.　The　system　can　be　reconfigured　to　perform　as　the　two-coil　structure　with　a　CC　output　or　as　the　three-coil　structure　with　CV　output.　Unlike　existing　methods,　the　working　frequency　is　fixed　and　only　one　relay　is　utilized　to　achieve　the　shift　of　CC　and　CV　charging,　which　has　the　advantages　of　simpleness　and　low　cost.　An　experimental　prototype　with　94.4%　maximum　efficiency　is　implemented　to　validate　the　proposal.　©　1982-2012　IEEE.