A battery connector system for connecting battery cells of a battery module includes a carrier assembly having a carrier housing and a plurality of bus bar assemblies held by the carrier housing. The bus bar assemblies are configured to connect corresponding battery terminals of adjacent battery cells. The carrier assembly includes a plurality of cell connecting sections each holding a corresponding bus bar assembly and cover portions associated with the cell connecting sections. The carrier housing has a unitary construction with each of the cell connecting sections and cover portions being integral.