An electrically driven vehicle includes a battery pack including a battery ECU, a gate ECU provided separately from the battery pack, and an HVECU provided separately from the battery pack and the gate ECU and configured to control any one of battery power and battery current of the secondary battery as a control target. The gate ECU relays communication between the battery ECU and the HVECU, and stores, in a ring buffer, history information on information exchanged between the battery ECU and the HVECU.