Battery　is　a　key　component　of　Electric　Vehicles　(EVs),　which　has　sparked　a　great　demand　for　improvement　in　the　EVs　charging　system.　This　paper　proposes　an　integrated　charging　system　for　wireless　power　transfer　(WPT),　Onboard　charger　(OBC),　and　auxiliary　power　module　(APM).　The　receiving　coil　on　the　secondary　side　can　be　weakly　coupled　with　the　transmitting　coil　of　WPT　and　strongly　coupled　with　the　transmitting　coil　of　OBC.　Using　a　transformer　on　the　receiving　side　to　integrate　the　APM　into　the　circuit.　In　this　way,　receiving　coil,　compensation　network,　and　power　electronics　converter　can　be　shared.　The　integrated　structure　can　work　in　three　working　patterns.　In　the　WPT　mode　and　OBC　mode,　power　grid　delivers　energy　to　the　EV　batteries,　high-voltage　(HV)　batteries　and　low-voltage　(LV)　batteries　can　be　charged　at　the　same　time.　In　the　APM　mode,　HV　batteries　power　LV　batteries.　In　the　traditional　EV　charger,　WPT,　OBC,　and　APM　are　three　separate　systems.　This　paper　integrates　three　charging　systems　with　the　advantages　of　high-power　density　and　cost　effectiveness.　The　experimental　results　verify　the　proposal.　　©　2024　IEEE.