CHARGE-DISCHARGE MANAGEMENT DEVICE, POWER CONDITIONER, POWER STORAGE DEVICE, AND PROGRAM

• US 20150291044A1
• Filed: 11/13/2013
• Published: 10/15/2015
• Est. Priority Date: 12/05/2012
• Status: Abandoned Application

• Current Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Intellectual Property Management Co., Ltd. (Panasonic Holdings Corporation)
• Inventors: Adachi, Masakazu, Kobayashi, Susumu, Yoshizawa, Jin
• Application Number:
  US14/441,624
• Publication Number:
  US 20150291044A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60L 2240/545 Temperature
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 2250/10 by alarm
• CPC Class Codes: B60L 2250/16 by display
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 53/14 Conductive energy transfer
• CPC Class Codes: B60L 53/22 Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
• CPC Class Codes: B60L 53/305 Communication interfaces
• CPC Class Codes: B60L 53/62 in response to charging parameters, e.g. current, voltage or electrical charge
• CPC Class Codes: B60L 55/00 Arrangements for supplying energy stored within a vehicle to a power network, i.e. vehicle-to-grid [V2G] arrangements
• CPC Class Codes: B60L 58/14 Preventing excessive discharging
• CPC Class Codes: B60L 58/16 responding to battery ageing, e.g. to the number of charging cycles or the state of health [SoH]
• CPC Class Codes: B60L 58/24 for controlling the temperature of batteries
• CPC Class Codes: B60L 58/25 by controlling the electric load
• CPC Class Codes: H01M 10/443 in response to temperature
• CPC Class Codes: H01M 10/48 Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569
• CPC Class Codes: H01M 10/486 for measuring temperature
• CPC Class Codes: H01M 10/488 Cells or batteries combined with indicating means for external visualization of the condition, e.g. by change of colour or of light density
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H01M 50/569 : Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals battery terminal connectors with integrated measuring arrangements G01R31/364
• CPC Class Codes: H02J 7/0047 : with monitoring or indicating devices or circuits
• CPC Class Codes: H02J 7/005 : Detection of state of health [SOH]
• CPC Class Codes: H02J 7/0063 : with circuits adapted for supplying loads from the battery
• CPC Class Codes: H02J 7/007194 : of the battery
• CPC Class Codes: H02J 7/04 : Regulation of charging current or voltage
• CPC Class Codes: Y02E 60/00 : Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• 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: Y04S 10/126 : the energy generation units being or involving electric vehicles [EV] or hybrid vehicles [HEV], i.e. power aggregation of EV or HEV, vehicle to grid arrangements [V2G]

Abstract

A charge-discharge management device includes an instruction unit, an temperature input unit and a setting unit in order to manage charge and discharge states of a storage battery for supplying and receiving electric power to and from a distribution network for supplying electric power to an electric load. The instruction unit indicates magnitude of a charge current for the storage battery. The temperature input unit obtains a battery temperature of the storage battery. The setting unit sets the magnitude of the charge current to a first standard value if the battery temperature is in a normal range. If the battery temperature is out of the normal range, the setting unit sets the charge current to be below the first standard value and more increases a difference between the charge current and the first standard value as a degree of deviation from the normal range is larger.

Claims

1. A charge-discharge management device, configured to manage charge and discharge states of a storage battery, for supplying and receiving electric power to and from a distribution network for supplying electric power to an electric load, wherein the charge-discharge management device comprises:

an instruction unit having a function configured to indicate magnitude of a charge current for the storage battery;

an temperature input unit configured to obtain a battery temperature of the storage battery; and

a setting unit having a function configured to set the magnitude of the charge current in accordance with the battery temperature obtained through the temperature input unit, the setting unit further having

a function configured to set the magnitude of the charge current to a specified first standard value if the battery temperature is in a normal range, and

a function configured, if the battery temperature is out of the normal range, to set the charge current to be below the first standard value and to more increase a difference between the charge current and the first standard value as a degree of deviation from the normal range is larger,

wherein

the instruction unit further has a function configured to indicate an upper limit of a discharge current from the storage battery, and

the setting unit further has

a function configured to set the upper limit of the discharge current to a specified second standard value if the battery temperature is in the normal range, and

a function configured, if the battery temperature is out of the normal range, to set the upper limit of the discharge current to be below the second standard value and to more increase a difference between the upper limit of the discharge current and the second standard value as the degree of deviation from the normal range is larger,

the charge-discharge management device further comprises

a notification output unit configured to output a notification signal if the battery temperature obtained through the temperature input unit is out of the normal range during a period of time while the storage battery is charging or discharging, and

an instruction input unit configured to wait to receive an instruction to keep or stop the storage battery charging or discharging if the notification output unit outputs the notification signal, and

the instruction unit has a function configured, if the instruction input unit receives the instruction to stop the storage battery charging or discharging, to stop the storage battery from charging or discharging.

4. The charge-discharge management device of claim 1, further comprising a correction unit configured to calculate an index value representing a degree of degradation of the storage battery to more decrease the first and second standard values as the degree of degradation represented by the index value more advances.

5. The charge-discharge management device of claim 1, further comprising a communication interface unit configured to communicate with a controller that manages an operation of the electric load, wherein

the setting unit is configured

to be notified of available electric power from the controller through the communication interface unit during a period of time while the storage battery is charging, the available electric power being a difference between electric power supplied from a power supply source for supplying electric power to the storage battery and the electric load, and electric power consumed by the electric load, the magnitude of the charge current being set based on the available electric power, and

to notify the controller through the communication interface unit of the upper limit of the discharge current, which is a criterion of electric power that can be supplied from the storage battery to the electric load, during the period of time while the storage battery is discharging.

6. The charge-discharge management device of claim 1, wherein

the storage battery is equipped for an electrically driven vehicle configured to consume electric power as traveling energy, the electrically driven vehicle comprising a power coupler configured to select from a coupled state that allows the storage battery to supply or receive electric power to or from the distribution network and a separated state that it is separated from the distribution network and allows the electrically driven vehicle to travel, and

the instruction unit is configured to operate for a period of time while the storage battery is coupled to the distribution network.

7. A power conditioner, comprising

a charge-discharge management device of claim 1, and

a power converter configured to perform bidirectional power conversion between the storage battery and the distribution network based on a content that is indicated from the charge-discharge management device.

8. A power storage device, comprising

the power conditioner of claim 7,

the storage battery, and

one housing in which the power conditioner and the storage battery are housed.

9. A program, for allowing a computer to function as the charge-discharge management device of claim 1.

10. The charge-discharge management device of claim 4, further comprising a communication interface unit configured to communicate with a controller that manages an operation of the electric load, wherein

the setting unit is configured

to be notified of available electric power from the controller through the communication interface unit during a period of time while the storage battery is charging, the available electric power being a difference between electric power supplied from a power supply source for supplying electric power to the storage battery and the electric load, and electric power consumed by the electric load, the magnitude of the charge current being set based on the available electric power, and

to notify the controller through the communication interface unit of the upper limit of the discharge current, which is a criterion of electric power that can be supplied from the storage battery to the electric load, during the period of time while the storage battery is discharging.

11. The charge-discharge management device of claim 4, wherein

the storage battery is equipped for an electrically driven vehicle configured to consume electric power as traveling energy, the electrically driven vehicle comprising a power coupler configured to select from a coupled state that allows the storage battery to supply or receive electric power to or from the distribution network and a separated state that it is separated from the distribution network and allows the electrically driven vehicle to travel, and

the instruction unit is configured to operate for a period of time while the storage battery is coupled to the distribution network.

12. The charge-discharge management device of claim 5, wherein

the storage battery is equipped for an electrically driven vehicle configured to consume electric power as traveling energy, the electrically driven vehicle comprising a power coupler configured to select from a coupled state that allows the storage battery to supply or receive electric power to or from the distribution network and a separated state that it is separated from the distribution network and allows the electrically driven vehicle to travel, and

the instruction unit is configured to operate for a period of time while the storage battery is coupled to the distribution network.

13. A power conditioner, comprising

a charge-discharge management device of claim 4, and

a power converter configured to perform bidirectional power conversion between the storage battery and the distribution network based on a content that is indicated from the charge-discharge management device.

14. A power conditioner, comprising

a charge-discharge management device of claim 5, and

a power converter configured to perform bidirectional power conversion between the storage battery and the distribution network based on a content that is indicated from the charge-discharge management device.

15. A power conditioner, comprising

a charge-discharge management device of claim 6, and

a power converter configured to perform bidirectional power conversion between the storage battery and the distribution network based on a content that is indicated from the charge-discharge management device.

16. A power storage device, comprising

the power conditioner of claim 13,

the storage battery, and

one housing in which the power conditioner and the storage battery are housed.

17. A power storage device, comprising

the power conditioner of claim 14,

the storage battery, and

one housing in which the power conditioner and the storage battery are housed.

18. A power storage device, comprising

the power conditioner of claim 15,

the storage battery, and

one housing in which the power conditioner and the storage battery are housed.

2-3. -3. (canceled)