The passive environmental management module includes a second exterior housing wall with an inner surface having said plurality of cooling fins mounted thereto and an outer surface adapted to contact a cold plate. The second exterior housing wall is adapted to thermally couple said plurality of cooling fins to the cold plate. The passive environmental management module includes an overpressure relief port disposed in the second exterior housing wall that is adapted to vent heat and smoke from a faulty battery cell out of the housing into an exhaust manifold behind the cold plate. The passive environmental management module includes a removable desiccant pack. The heat sink is disposed between said overpressure relief port and said desiccant pack along the fin axis. The second exterior housing wall is made from a highly conductive, corrosion-resistant metal. A silicone gasket forms the seal between the active module and the passive environmental module.