When　the　parameters　of　each　module　in　the　input　series　output　parallel（ISOP）dual　active　bridge　DC-DC（DAB）converter　system　are　different，the　system　has　over-voltage　and　over-current　caused　by　unbalanced　transmission　power，which　may　damage　the　device　in　serious　cases.　In　addition，current　stress　and　the　dynamic　performance　of　converters　should　also　be　considered　during　operation.　To　address　these　issues，this　paper　proposes　a　voltage　balance　control　scheme　combined　with　current　stress　optimization　based　on　dual　phase　shift.　The　current　stress　and　transmission　power　model　of　the　converter　under　dual　phase　shift　is　analyzed.　And　then　the　phase　shift　ratio　for　current　stress　optimization　is　obtained　by　the　KKT　condition　method.　On　the　basis　of　current　stress　optimization，a　voltage　balance　control　method　is　proposed.　The　outer　phase　shift　ratio　expression　is　deduced　through　the　transmission　power　model，and　the　voltage　balance　component　and　dynamic　transmission　power　are　introduced　to　achieve　input　voltage　balance　and　output　voltage　stability　and　improve　dynamic　performance.　Finally，a　dual-　module　ISOP-　DAB　experimental　platform　is　built，and　comparative　experiments　are　carried　out　to　verify　The　effectiveness　of　the　control　method　in　this　paper　is　verified　by　the　comparative　experiments.　©　2023　Science　Press.　All　rights　reserved.