A charge/discharge device that is configured to control charge/discharge of an electric-power storage apparatus , the charge/discharge device comprising: a heating determination unit that is configured to obtain a temperature of the electric-power storage apparatus at a time of starting up the electric-power storage apparatus and determine whether to heat the electric-power storage apparatus based on the temperature; characterized by further comprising: a heating control unit that is configured to control heating of the electric-power storage apparatus , when the heating determination unit determines to heat the electric-power storage apparatus , by obtaining a frequency characteristic, which is a relation between a frequency of charge and discharge and a resistance value of an internal resistance of the electric-power storage apparatus corresponding to the temperature and an obtained charge level of the electric-power storage apparatus and by performing control of alternately repeating charge and discharge of the electric-power storage apparatus in a charge/discharge period specified based on the frequency characteristic; and a voltage measurement unit that is configured to measure a voltage of the electric-power storage apparatus , wherein the heating control unit is configured to apply any current to the electric-power storage apparatus for a fixed period of time, then reduce the current to zero, and obtain the frequency characteristic based on a voltage reduction characteristic obtained based on a time change in a measured voltage of the voltage measurement unit immediately after the current is reduced to zero. a heating determination unit that is configured to obtain a temperature of the electric-power storage apparatus at a time of starting up the electric-power storage apparatus and determine whether to heat the electric-power storage apparatus based on the temperature; characterized by further comprising: a heating control unit that is configured to control heating of the electric-power storage apparatus , when the heating determination unit determines to heat the electric-power storage apparatus , by obtaining a frequency characteristic, which is a relation between a frequency of charge and discharge and a resistance value of an internal resistance of the electric-power storage apparatus corresponding to the temperature and an obtained charge level of the electric-power storage apparatus and by performing control of alternately repeating charge and discharge of the electric-power storage apparatus in a charge/discharge period specified based on the frequency characteristic; and a voltage measurement unit that is configured to measure a voltage of the electric-power storage apparatus , a heating control unit that is configured to control heating of the electric-power storage apparatus , when the heating determination unit determines to heat the electric-power storage apparatus , by obtaining a frequency characteristic, which is a relation between a frequency of charge and discharge and a resistance value of an internal resistance of the electric-power storage apparatus corresponding to the temperature and an obtained charge level of the electric-power storage apparatus and by performing control of alternately repeating charge and discharge of the electric-power storage apparatus in a charge/discharge period specified based on the frequency characteristic; and a voltage measurement unit that is configured to measure a voltage of the electric-power storage apparatus , wherein the heating control unit is configured to apply any current to the electric-power storage apparatus for a fixed period of time, then reduce the current to zero, and obtain the frequency characteristic based on a voltage reduction characteristic obtained based on a time change in a measured voltage of the voltage measurement unit immediately after the current is reduced to zero. <EOS>