POWER CONTROL APPARATUS

• US 20130134940A1
• Filed: 08/09/2011
• Published: 05/30/2013
• Est. Priority Date: 08/09/2010
• Status: Abandoned Application

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Tominaga, Ryuichiro
• Application Number:
  US13/816,114
• Publication Number:
  US 20130134940A1
• Time in Patent Office: Days
• US Class Current: 320/109
• CPC Class Codes: B60L 2260/58 Departure time prediction
• CPC Class Codes: B60L 53/00 Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
• CPC Class Codes: B60L 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: B60L 53/67 Controlling two or more charging stations
• CPC Class Codes: H01M 10/4207 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 10/46 Accumulators structurally combined with charging apparatus circuits for charging H02J7/00
• CPC Class Codes: H01M 2220/10 Batteries in stationary systems, e.g. emergency power source in plant
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H02J 3/003 Load forecast, e.g. methods or systems for forecasting future load demand
• CPC Class Codes: H02J 7/0071 with a programmable schedule
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries
• CPC Class Codes: Y02T 10/7072 Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles
• CPC Class Codes: Y02T 90/16 Information or communication technologies improving the operation of electric vehicles
• CPC Class Codes: Y02T 90/167 Systems integrating technologies related to power network operation and communication or information technologies for supporting the interoperability of electric or hybrid vehicles, i.e. smartgrids as interface for battery charging of electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: Y04S 10/50 Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
• CPC Class Codes: Y04S 30/14 Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

The power supplying system is provided with: a timing determining unit for determining the timing at which charging and/or discharging of a storage battery, which stores power by being charged and supplies power by being discharged, is to be executed; and a controllable period estimation unit for estimating a controllable period, which is a period of time wherein the timing determining unit is able to determine the timing at which to execute the charging or discharging of the storage battery. The timing determining unit determines the timing at which to execute the charging and/or discharging of the storage battery on the basis of the controllable period.

Claims

1-12. -12. (canceled)

13. A power control apparatus that supplies electric power to a load via a charger/discharger and controls a plurality of storage batteries into which electric power supplied via the charger/discharger is charged, the power control apparatus comprising:

a time period estimation portion that estimates a control-enabled time period of each of the plurality of storage batteries connected to the charger/discharger;

a determination portion that, based on the control-enabled time period, determines a timing for performing at least one of charging and discharging of each of the plurality of storage batteries; and

a setting portion that sets a recommended discharging time period in which each of the storage batteries should be discharged,

wherein

each of the plurality of storage batteries is provided in an electric-powered vehicle,

based on a time period for which the electric-powered vehicle is intended to be parked, the time period estimation portion estimates the control-enabled time period of each of the storage batteries,

the determination portion determines at least part of an overlapping time period between the control-enabled time period and the recommended discharging time period as a discharging timing of each of the storage batteries, and

the determination portion performs switching between respective charging timings of the plurality of storage batteries so that the respective charging timings are shifted from each other and switching between respective discharging timings thereof so that the respective discharging timings are shifted from each other.

14. The power control apparatus according to claim 13, wherein

the determination portion determines the respective charging timings of the plurality of storage batteries so that the respective charging timings do not overlap with each other and the respective discharging timings thereof so that the respective discharging timings do not overlap with each other.

16. The power control apparatus according claim 13, wherein

the determination portion determines as the charging timing of each of the storage batteries, at least part of a period of time that falls within the control-enabled time period and outside the recommended discharging time period.

17. The power control apparatus according to claim 13, wherein

the determination portion determines the discharging timing and the charging timing so that an amount of electric power discharged from each of the storage batteries at the discharging timing substantially equals an amount of electric power charged into the each of the storage batteries at the charging timing.

18. The power control apparatus according to claim 13, wherein

in a case where there is no overlapping period of time between the control-enabled time period and the recommended discharging time period, the determination portion sets only the charging timing that falls within the control-enabled time period without setting the discharging timing that falls within the control-enabled time period.

19. The power control apparatus according to claim 13, wherein

in a case where a predetermined one of the storage batteries is disconnected from the charger/discharger after having been connected thereto for a time period shorter than a duration of the control-enabled time period of said predetermined one of the storage batteries, the determination portion determines a discharging timing of any other one of the storage batteries so that electric power in an amount to compensate for a power shortfall from an amount of electric power that was originally supposed to be supplied from the predetermined one of the storage batteries to the load is supplied from said any other one of the storage batteries to the load.

20. The power control apparatus according to claim 13, further comprising:

a load amount estimation portion that estimates an amount of electric power to be supplied to the load by the power control apparatus,

wherein the setting portion sets as the recommended discharging time period, a time period in which, by the load amount estimation portion, the amount of electric power to be supplied to the load by the power control apparatus is estimated to become larger than in other time periods.

21. The power control apparatus according to claim 13, wherein

the power control apparatus can use system power supplied from a power company, and

the setting portion sets as the recommended discharging time period, a time period in which a cost per unit amount of the system power is high and as a recommended charging time period, a time period in which the cost per unit amount of the system power is low.

22. The power control apparatus according to claim 20, further comprising a stationary storage battery,

wherein controllable capacities of the stationary storage battery and each of the storage batteries provided in the electric-powered vehicle are detected, and

in a case where the controllable capacities of the stationary storage battery and the each of the storage batteries provided in the electric-powered vehicle are larger than a capacity estimated by the load amount estimation portion, the stationary storage battery is discharged at a predetermined discharge rate, and then the each of the storage batteries provided in the electric-powered vehicle is discharged.

23. The power control apparatus according to claim 22, wherein

in a case where the controllable capacities of the stationary storage battery and each of the storage batteries provided in the electric-powered vehicle are smaller than the capacity estimated by the load amount estimation portion, electric power in an amount corresponding to a difference capacity between the controllable capacities of the stationary storage battery and each of the storage batteries provided in the electric-powered vehicle and the capacity estimated by the load amount estimation portion is supplied from standby power.

24. The power control apparatus according to claim 22, wherein

the load amount estimation portion estimates a load capacity based on previous charging/discharging data.

25. The power control apparatus according to claim 22, wherein

at every predetermined time interval, a comparison is made between the controllable capacities of the stationary storage battery and each of the storage batteries provided in the electric-powered vehicle and the capacity estimated by the load amount estimation portion, and based on a result of the comparison, charging/discharging is performed.

26. The power control apparatus according to claim 22, wherein

in a case where a change is made to data on intended parking of the electric-powered vehicle, a comparison is made between the controllable capacities of the stationary storage battery and each of the storage batteries provided in the electric-powered vehicle and the capacity estimated by the load amount estimation portion, and based on a result of the comparison, charging/discharging is performed.

27. The power control apparatus according to claim 22, wherein

based on timings determined by the timing determination portion, the charger/discharger performs charging or discharging of each of the storage batteries provided in the electric-powered vehicle or the stationary storage battery.