Electric power management apparatus, system and method

• US 9,252,597 B2
• Filed: 09/23/2011
• Issued: 02/02/2016
• Est. Priority Date: 03/25/2011
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Yumura, Tsubasa, Terashima, Yoshiki
• Primary Examiner(s): Dunn, Drew A
• Assistant Examiner(s): Robbins, Jerry D
• Application Number:
  US13/241,556
• Publication Number:
  US 20120242293A1
• Time in Patent Office: 1,593 Days
• Field of Search: 320/134
• US Class Current: 1/1
• CPC Class Codes: H02J 2310/14 The load or loads being home appliances
• CPC Class Codes: H02J 3/32 using batteries with converting means
• CPC Class Codes: Y02B 70/30 Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
• CPC Class Codes: Y02B 70/3225 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 20/222 Demand response systems, e.g. load shedding, peak shaving
• CPC Class Codes: Y04S 20/242 Home appliances

Abstract

According to one embodiment, an electric power management apparatus is for controlling electric power of at least one home appliance using at least one rechargeable battery. The apparatus includes an analysis unit, a first generating unit, and a second generating unit. The analysis unit analyzes a charge residue of the rechargeable battery. The first generating unit generates a control schedule used to control the electric power of the home appliance in accordance with the charge residue. The second generating unit generates a charge/discharge schedule used to control charge and discharge of the rechargeable battery in accordance with the charge residue.

Claims

1. An electric power management apparatus for controlling electric power of at least one home appliance using at least one rechargeable battery, the apparatus comprising:

an analysis unit configured to analyze a charge residue of the at least one rechargeable battery;

a first generating unit configured to generate a control schedule used to control the electric power of the home appliance in accordance with the charge residue;

a second generating unit configured to generate a charge/discharge schedule used to control charge and discharge the at least one rechargeable battery in accordance with the charge residue;

a first communication unit configured to receive and transmit a first packet from and to the at least one rechargeable battery;

a second communication unit configured to receive a second packet for a request to save electric power from outside, wherein the electric power is saved in accordance with the second packet;

a schedule unit configured to determine whether the request to save electric power is satisfied only by discharge of the at least one rechargeable battery, when the second communication unit receives the second packet; and

a data storage unit configured to store information included in the first packet, the second packet, the control schedule, and the charge/discharge schedule,

wherein the second generating unit generates the charge/discharge schedule upon receiving the second packet, and charging of the at least one rechargeable battery is commenced immediately upon receiving the charge/discharge schedule.

2. The apparatus according to claim 1, wherein the schedule unit estimates a charge residue of the at least one rechargeable battery assumed at an electric power saving start time, based on a current charge residue of the at least one rechargeable battery, a current time and the electric power saving start time, and determines whether the request is satisfied only by the discharge of the at least one rechargeable battery based on comparing the charge residue of the at least one rechargeable battery at the electric power saving start time with the requested saving electric power.

3. The apparatus according to claim 1, wherein when it is determined that the request is satisfied only by the discharge of the at least one rechargeable battery, the schedule unit determines whether the at least one rechargeable battery needs to be charged.

4. The apparatus according to claim 3, wherein when the schedule unit determines whether the at least one rechargeable battery needs to be charged, the schedule unit compares a current charge residue with the requested saving electric power.

10. The apparatus according to claim 1, wherein the data storage unit includes a power saving demand storage unit, a storage unit for a home appliance control schedule table, and a storage unit for a rechargeable battery charging schedule table.

5. An electric power management method for controlling electric power of at least one home appliance using at least one rechargeable battery, the method comprising:

analyzing a charge residue of the at least one rechargeable battery;

generating a control schedule used to control the electric power of the home appliance in accordance with the charge residue;

generating a charge/discharge schedule used to control charge and discharge of the at least one rechargeable battery in accordance with the charge residue;

receiving and transmitting a first packet from and to the at least one rechargeable battery;

receiving a second packet for a request to save electric power from outside, wherein the electric power is saved in accordance with the second packet;

determining whether the request to save electric power is satisfied only by discharge of the at least one rechargeable battery, when the second packet is received; and

storing information included in the first packet, the second packet, the control schedule, and the charge/discharge schedule,

wherein the generating the charge/discharge schedule generates the charge/discharge schedule upon receiving the second packet, and charging of the at least one rechargeable battery is commenced immediately upon receiving the charge/discharge schedule.

6. The method according to claim 5, further comprising:

estimating a charge residue of the at least one rechargeable battery assumed at an electric power saving start time, based on a current charge residue of the at least one rechargeable battery, a current time and the electric power saving start time; and

determining whether the request is satisfied only by the discharge of the at least one rechargeable battery based on comparing the charge residue of the at least one rechargeable battery at the electric power saving start time with the requested saving electric power.

7. The method according to claim 5, wherein when it is determined that the request is satisfied only by the discharge of the at least one rechargeable battery, whether the at least one rechargeable battery needs to be charged is determined.

8. The method according to claim 7, wherein when whether the at least one rechargeable battery needs to be charged is determined, a current charge residue is compared with the electric power requested to save by the request.

9. An electric power management system comprising:

at least one home appliance;

at least one rechargeable battery; and

an electric power management unit,

wherein the electric power management unit comprises;

an analysis unit configured to analyze a charge residue of the at least one rechargeable battery;

a first generating unit configured to generate a control schedule used to control the electric power of the home appliance in accordance with the charge residue;

a second generating unit configured to generate a charge/discharge schedule used to control charge and discharge of the at least one rechargeable battery in accordance with the charge residue;

a first communication unit configured to receive and transmit a first packet from and to the at least one rechargeable battery;

a second communication unit configured to receive a second packet for a request to save electric power from outside, wherein the electric power is saved in accordance with the second packet;

a schedule unit configured to determine whether the request to save electric power is satisfied only by discharge of the at least one rechargeable battery, when the second communication unit receives the second packet; and

a data storage unit configured to store information included in the first packet, the second packet, the control schedule, and the charge/discharge schedule,

wherein the second generating unit generates the charge/discharge schedule upon receiving the second packet, and charging of the at least one rechargeable battery is commenced immediately upon receiving the charge/discharge schedule.

11. The system according to claim 9, wherein the data storage unit includes a power saving demand storage unit, a storage unit for a home appliance control schedule table, and a storage unit for a rechargeable battery charging schedule table.