The method of the power supply, charging control device and the power supply system

Discloses a method of energy can be used when needed, easily increased or decreased, and the power supply method capable of reducing the initial investment in infrastructure. The power supply method comprising: an initial setting step by the charging means each including a plurality of secondary batteries of the battery device, and performs contactless power transmission means for transmitting to charge the batteries in a stacked manner of a power control apparatus the initial setting is performed; power transmission instruction step, the charging control means provides an instruction to start the contactless power transmission from the charging device via the initial setting step of setting the initial to the battery apparatus; contactless power transmission step, performed from the charging device non-contact power transmission apparatus to the battery; and a charging step is completed, upon completion of charging of the battery device, the battery device notifies the charging control means charging is completed. After the completion of the charging step, a transmission instruction step, wherein said charging control means starts the non-indicating means for indicating a transmission apparatus with the battery power in the power transmission instruction step in said different battery charging apparatus contact power transmission.