Charge control device

A charge control device configured to control charging of a lithium ion battery, the charge control device comprising:

• a first processing unit configured to estimate an inflow current flowing into the lithium ion battery when a current flowing through a load stops;
• a second processing unit configured to derive a protective charging current that is a maximum value of charging current not to cause the lithium ion battery to form lithium deposition;
• a third processing unit configured to calculate a charging upper limit current based on the protective charging current and the inflow current, the charging upper limit current being an upper limit of current to charge the lithium ion battery;
• and
• a fourth processing unit configured to control charging of the lithium ion battery based on a limit electric power calculated from the charging upper limit current and a voltage of the lithium ion battery.