Charging system

摘要

[Problem] To provide a charging system that levels the amount of grid power that is used, and that is capable of reducing power rates, even if charging has been frequently conducted without limiting the time zones in which charging is conducted. [Solution] A charging system is provided with: a storage unit that is charged by consuming grid power supplied by a power company, and that supplies the stored power through discharge; and a charging unit that charges batteries by consuming power supplied by grid power and the storage unit. Power companies set a power rate that is higher the greater the maximum value of the amount of power supplied for each unit of time is. Furthermore, at least a single charge carried out by the charging unit is carried out over two units of time, and the storage unit supplies power to the charging unit in at least one unit of time other than said two units of time.

主权项

1. A charge system that charges a battery, comprising:
a power storage portion that stores system power supplied from an electric power company and discharges stored power; a charge portion that charges the battery by means of system power supplied from the electric power company or the power charged in the power storage portion; and a control portion that controls a charge into the battery by the charge portion, a charge and a discharge of the power storage portion; wherein in a case where a higher power rate is set as a consumption amount of the system power per each unit time duration becomes larger, the control portion uses the system power supplied from the electric power company to start at least one charge, which is performed from the charge portion into the battery, within a first unit time duration, thereafter, ends the at least one charge within a second unit time duration that follows the first unit time duration, and uses the system power supplied from the electric power company to charge the power storage portion within at least one time span of a time span from a start time point of the first unit time duration to a start time point of the battery charge and a time span from an end time point of the battery charge to an end time point of the second unit time duration.