CHARGING DEVICE

To provide a charging device which charges a battery by power supplied from a system, capable of reducing power which becomes waste when estimating a full charge capacity of a battery.SOLUTION: A charging device executes: first charging processing that power is supplied to a first power storage device St1 from a system P until a first battery B1 becomes a full charging state, and power is supplied to the first power storage device St1 from a second power storage device St2; estimation processing that power is supplied from at least the first power storage device St1 to the second power storage device St2 until the first battery B1 becomes a complete discharge state, for estimating an integrated value of current output from the first power storage device St1 as a full charge capacity of the first battery B1 until the first power storage device St1 becomes the complete discharge state from the full charging state; and second charging processing that power is supplied to the first power storage device St1 from the second power storage device St2 until the first battery B1 becomes the full charging state.SELECTED DRAWING: Figure 1 【課題】系統から供給される電力によりバッテリを充電させる充電装置において、バッテリの満充電容量を推定する際に無駄になる電力を低減する。【解決手段】第１バッテリＢ１が満充電状態になるまで系統Ｐから第１蓄電装置Ｓｔ１へ電力を供給させるとともに第２蓄電装置Ｓｔ２から第１蓄電装置Ｓｔ１へ電力を供給させる第１充電処理を実行し、第１バッテリＢ１が完全放電状態になるまで少なくとも第１蓄電装置Ｓｔ１から第２蓄電装置Ｓｔ２へ電力を供給させ、第１蓄電装置Ｓｔ１が満充電状態から完全放電状態になるまでの間に第１蓄電装置Ｓｔ１から出力される電流の積算値を第１バッテリＢ１の満充電容量として推定する推定処理を実行し、第１バッテリＢ１が満充電状態になるまで第２蓄電装置Ｓｔ２から第１蓄電装置Ｓｔ１へ電力を供給させる第２充電処理を実行する。【選択図】図１