One　current　issue　concerning　rapidly　developing　electric　vehicles　(EVs)　is　range　anxiety,　especially　when　no　charging　station　is　around.　A　simple　and　expandable　vehicle-to-vehicle　(V2V)　wireless　charging　scheme　has　been　proposed　to　satisfy　urgent　charging　needs.　In　the　proposed　V2V　system,　one　EV　serves　as　a　mobile　charger　for　the　other.　Two　power　relay　coils　without　compensating　capacitors　are　adopted,　forming　a　strong　coupling　with　the　coils　in　the　EV.　Thus,　power　can　be　transferred　from　one　EV　to　the　other　via　the　ac　magnetic　relay.　The　mathematical　models　of　the　existing　loosely　coupled　V2V　system　and　the　proposed　strongly　coupled　V2V　system　are　established.　The　constant-voltage　and　constant-current　operations　for　the　proposed　V2V　system　are　explored.　The　experimental　results　reveal　that,　compared　with　the　existing　loosely　coupled　V2V　system,　employing　the　proposed　strongly　coupled　V2V　system　can　improve　efficiency　and　reduce　weight,　volume,　and　cost.　©　1986-2012　IEEE.