Power storage system

A power storage system comprising:

• a battery including a first power storage, a second power storage, and a first switch unit configured to switch between a first voltage state in which the first power storage and the second power storage are connected in series and chargeable at a first voltage, and a second voltage state in which the first power storage and the second power storage are connected in parallel and chargeable at a second voltage;
• a three-phase motor in which coils of three phases are connected at a neutral point, the three-phase motor being driven by electric power supplied from the battery;
• an inverter connected on an electric power transmission path between the battery and the three-phase motor;
• and
• a DC power supply circuit connected to a first connection portion positioned on an electric power transmission path between the inverter and the battery,
• wherein the DC power supply circuit has a branch circuit connected to a coil of any one phase among the coils of three phases at a positive electrode side of the DC power supply circuit,
• wherein the branch circuit is connected to a coil of any one phase among the coils of three phases at a second connection portion via a second switch unit, and
• wherein the branch circuit is connected to an electric power transmission path at a negative electrode side between the inverter and the battery via a fourth switch unit and a capacitor.