CHARGING CONTROL SYSTEM

An objective of the present invention is to suppress a heat generation during charging while preventing erroneous detection of welding of a relay on the battery charging path. A charging control device 100 including: a first electrode side supply path 101a and a second electrode supply path 101b which form a supply path from a charging installation 220 to a battery 200; a voltage measurement circuit 120 configured to measure a voltage between the first electrode side supply path and the second electrode side supply path; a first electrode side relay 130a on the first electrode side supply path, the first electrode side relay being located closer to the battery than the voltage measurement circuit; a second electrode side relay 130b on the second electrode side supply path, the second electrode side relay being located closer to the battery than the voltage measurement circuit; a series circuit of a resistor 140 and a resistance regulation relay 150, the series circuit being connected in parallel to the voltage measurement circuit; and a controller 110 configured to control opening and closing the first electrode side relay, the second electrode side relay and the resistance regulation relay, wherein the controller is configured to control the resistance regulation relay to be closed when performing welding determination of the first electrode side relay and/or the second electrode side relay.