US 9,071,068 B2Granted

Charge/discharge control apparatus

AssigneePanasonic Intellectual Property Management Co., Ltd.

InventorsKazufumi Nishikawa, Yasuo Okuda, Atsushi Ouchi

Life of this patent

Estimating the term…

Loading patent…

Abstract

An estimation unit estimates the amount of power consumption for each unit period of time. A rechargeable battery control unit controls the rechargeable battery such that an exceeding amount of power worth the amount of power exceeding a target amount of power during a unit period of time is charged into the battery, and power is discharged from the battery during a time zone wherein the target amount of power is exceeded, on the basis of the result of the estimation. When the battery needs to be charged in excess of the upper-limit value, the control unit charges the battery up to the upper-limit value during a time zone wherein the amount of power consumption estimated is light, and the amount of power that exceeds the upper-limit value is charged during a time zone that is close to the time zone wherein the target amount of power is exceeded.

Claims9

Dependent claims

A charge/discharge control apparatus that controls charging/discharging of a rechargeable battery, comprising:

estimation circuitry which, in operation, estimates power usage per unit time period;
and
rechargeable battery control circuitry which, in operation, performs control in which, based on a result of the estimation by the estimation circuitry, power in an amount sufficient to allow discharging of an excess amount of power over a target power value within the unit time period is charged into the rechargeable battery, and an amount of power corresponding to the excess amount of power is discharged from the rechargeable battery during a time zone in which the target power value is exceeded,
wherein in the rechargeable battery control circuitry, an upper limit value of a charge amount with respect to full charge of the rechargeable battery is set, and in a case where the rechargeable battery needs to be charged beyond the upper limit value, the rechargeable battery control circuitry charges the rechargeable battery to the upper limit value during a time zone in which the power usage estimated by the estimation circuitry is low, and charges thereinto an excess over the upper limit value during a time zone close to the time zone in which the target power value is exceeded.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 13/807,910Filed 29 Jun 2011
Priority: JP 2010-15030330 Jun 2010
Published: US 2013/0099751 A125 Apr 2013
Granted: 30 Jun 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

H02J 3/32
Arrangements for balancing of the load in networks by storage of energy: using batteries or super capacitors with converting means
H01M 10/44
Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells: methods for charging or discharging
H01M 10/48
Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells: accumulators combined with arrangements for…
H02J 7/04
For charging batteries from AC mains by converters: regulation of charging current or voltage