A battery assembly container comprising: a box body having an opening in an upper surface of the box body, and accommodating a battery assembly; a lid body configured to close the opening of the box body; heater units for a plurality of systems provided in the box body, wherein each of a plurality of heaters (102a to 102f) of the heater units for the plurality of systems includes: a heater wire (106a to 106f) provided in the box body; a positive side heater wiring line (120a1 to 120a6) connected to a positive terminal of the heater wire (106a to 106f); and a negative side heater wiring line (120b1 to 120b6) connected to a negative terminal of the heater wire (106a to 106f), and wherein a plurality of heaters of a heater unit for at least one system, among the heater units for the plurality of systems, are connected in series, and a terminal frame provided outside the box body, wherein the terminal frame includes: a plurality of positive side connection terminals (144a1 to 144a6) each connected to the positive side heater wiring lines (120a1 to 120a6), in correspondence with each of the heaters (102a to 102f); a plurality of negative side connection terminals (144b1 to 144b6) each connected to the negative side heater wiring lines (120b1 to 120b6), in correspondence with each of the heaters (102a to 102f); and one or more jumper wires (148a to 148d) electrically connecting the positive side connection terminals and the negative side connection terminals corresponding respectively to the plurality of heaters connected in series. a box body having an opening in an upper surface of the box body, and accommodating a battery assembly; a lid body configured to close the opening of the box body; heater units for a plurality of systems provided in the box body, wherein each of a plurality of heaters (102a to 102f) of the heater units for the plurality of systems includes: a heater wire (106a to 106f) provided in the box body; a positive side heater wiring line (120a1 to 120a6) connected to a positive terminal of the heater wire (106a to 106f); and a negative side heater wiring line (120b1 to 120b6) connected to a negative terminal of the heater wire (106a to 106f), and a heater wire (106a to 106f) provided in the box body; a positive side heater wiring line (120a1 to 120a6) connected to a positive terminal of the heater wire (106a to 106f); and a negative side heater wiring line (120b1 to 120b6) connected to a negative terminal of the heater wire (106a to 106f), and wherein a plurality of heaters of a heater unit for at least one system, among the heater units for the plurality of systems, are connected in series, and a terminal frame provided outside the box body, wherein the terminal frame includes: a plurality of positive side connection terminals (144a1 to 144a6) each connected to the positive side heater wiring lines (120a1 to 120a6), in correspondence with each of the heaters (102a to 102f); a plurality of negative side connection terminals (144b1 to 144b6) each connected to the negative side heater wiring lines (120b1 to 120b6), in correspondence with each of the heaters (102a to 102f); and one or more jumper wires (148a to 148d) electrically connecting the positive side connection terminals and the negative side connection terminals corresponding respectively to the plurality of heaters connected in series. a plurality of positive side connection terminals (144a1 to 144a6) each connected to the positive side heater wiring lines (120a1 to 120a6), in correspondence with each of the heaters (102a to 102f); a plurality of negative side connection terminals (144b1 to 144b6) each connected to the negative side heater wiring lines (120b1 to 120b6), in correspondence with each of the heaters (102a to 102f); and one or more jumper wires (148a to 148d) electrically connecting the positive side connection terminals and the negative side connection terminals corresponding respectively to the plurality of heaters connected in series.