Electric storage system

• US 10,389,142 B2
• Filed: 06/25/2015
• Issued: 08/20/2019
• Est. Priority Date: 08/21/2014
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Sugeno, Naoyuki, Watanabe, Kohki, Yanagihara, Kazuharu, Imamura, Noritoshi, Suzuki, Yusuke
• Primary Examiner(s): Ngo, Brian
• Application Number:
  US15/329,701
• Publication Number:
  US 20170207637A1
• Time in Patent Office: 1,517 Days
• Field of Search: 320118, 320126
• 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 53/65 involving identification of vehicles or their battery types
• CPC Class Codes: B60L 53/665 Methods related to measuring, billing or payment
• 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 58/10 for monitoring or controlling batteries
• CPC Class Codes: H01M 10/425 Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing printed circuits H05K1/00
• CPC Class Codes: H01M 2010/4271 Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
• CPC Class Codes: H02J 3/32 using batteries with converting means
• CPC Class Codes: H02J 7/0013 acting upon several batteries simultaneously or sequentially H02J7/1423 takes precedence
• CPC Class Codes: H02J 7/0014 Circuits for equalisation of charge between batteries
• CPC Class Codes: H02J 7/0019 using switched or multiplexed charge circuits
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• 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 10/126 : 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]
• CPC Class Codes: Y04S 30/14 : Details associated with the interoperability, e.g. vehicle recognition, authentication, identification or billing

Abstract

Provided is an electric storage system including: a plurality of electric storage devices including a plurality of modules, a battery management unit, and a line concentrator connected with the battery management unit; wherein the plurality of modules include a battery unit, a voltage measurement unit, a temperature measurement unit and a current measurement unit, and wherein the battery management unit is configured to control at least one of the plurality of electric storage devices based on an instruction transmitted from the line concentrator.

Claims

1. An electric storage system comprising:

a common power line;

a plurality of electric storage devices including a plurality of modules;

a battery management unit;

a line concentrator connected with the battery management unit; and

a system controller connected with the line concentrator through a communication passage,

wherein the plurality of modules include a battery unit, a voltage measurement unit, a temperature measurement unit and a current measurement unit,

wherein the battery management unit is configured to control at least one of the plurality of electric storage devices based on an instruction transmitted from the line concentrator,

wherein the common power line is connected to the battery management unit and the line concentrator, and

wherein the electric storage device is configured to stop charging/discharging in a case that a series number and parallel number of the modules of the electric storage device set in the line concentrator by the system controller are different from a series number and parallel number of the modules of the electric device detected by the line concentrator.

2. The electric storage system according to claim 1, wherein the battery management unit is configured to control charge/discharge of the electric storage device based on the instruction transmitted from the line concentrator.

3. The electric storage system according to claim 1, wherein the line concentrator is configured to acquire an identification information of the battery management unit from the battery management unit, and in a case where the identification information is consecutively acquired a plurality of times with no change, the line concentrator determines that the battery management unit is in a state of being connected to the line concentrator.

4. The electric storage system according to claim 1,

wherein the line concentrator is configured to acquire an identification information of the battery management unit from the battery management unit, and

wherein charge/discharge of the at least one of the plurality of electric storage devices is permitted in a case where an identification information set in the line concentrator and the identification information acquired from the battery management unit match.

5. The electric storage system according to claim 4, wherein charge/discharge of the at least one of the plurality of electric storage devices is prohibited in a case where the identification information set in the line concentrator and the identification information acquired from the battery management unit by the line concentrator do not match or the identification information is not acquired.

6. The electric storage system according to claim 1, wherein the line concentrator is configured to acquire the measurement data transmitted from the modules through the battery management unit.

7. The electric storage system according to claim 1, further comprising a power conditioning system, wherein the power conditioning system is configured to control

a first current value of a first current that flows to the at least one of the plurality of electric storage devices to a first value or lower by controlling a second current value of a second current that flows to the line concentrator in a case where a voltage of the at least one of the plurality of electric storage devices is within a first value range.

8. The electric storage system according to claim 1, further comprising a power conditioning system, wherein the power conditioning system is configured to control

a first current value of a first current that flows to the at least one of the plurality of electric storage devices to a second value or lower by controlling a second current value of a second current that flows to the line concentrator in a case where a temperature of the at least one of the plurality of electric storage devices is within a second value range.

9. The electric storage system according to claim 7, wherein the power conditioning system is configured to control the second current value of the second current to a value calculated based on a minimum current value associated with at least one current that flows to the plurality of electric storage devices.

10. The electric storage system according to claim 7, wherein the power conditioning system is configured to control the second current value of the second current to a value calculated based on at least one of one half of a rated current value and one quarter of the rated current value associated with at least one of the plurality of electric storage devices.

11. The electric storage system according to claim 7, wherein the power conditioning system is configured to control the first current value of the first current to a third value or lower in a case where the voltage of the at least one of the plurality of electric storage devices is at least one of a voltage lower than a charge upper limit voltage and a voltage higher than a discharge lower limit voltage.

12. The electric storage system according to claim 1, wherein in a case where a voltage difference between the plurality of electric storage devices is outside of a value range, an alarm operation is performed, and charge/discharge of at least one of the plurality of electric storage devices is controlled.

13. The electric storage system according to claim 1, wherein a charge/discharge operation of the at least one of the plurality of electric storage devices is prohibited in a case where a first connection mode of the modules of the at least one of the plurality of electric storage devices set in the line concentrator and a second connection mode of the modules based on data that the line concentrator has received are different.

14. The electric storage system according to claim 1, wherein an alarm operation is performed in a case where a first connection mode of the battery management unit set in the line concentrator and a second connection mode of the battery management unit based on data that the line concentrator has received are different.

15. The electric storage system according to claim 1, wherein in a case where an abnormality occurs in at least one of the modules and the battery management unit, the line concentrator issues an instruction to stop charge/discharge to the at least one of the plurality of electric storage devices in which the abnormality has occurred.

16. The electric storage system according to claim 1,

wherein upon receiving an instruction from the system controller, the line concentrator transmits an instruction to the battery management unit.

17. The electric storage system according to claim 1, wherein the electric storage device is configured to supply power to at least one of a power network and a power generator, and the at least one of the power network and the power generator is configured to supply power to the electric storage device.

18. The electric storage system according to claim 1, wherein the voltage measurement unit is configured to measure a voltage of the battery unit, the temperature measurement is configured to measure a temperature of the battery unit, the current measurement unit is configured to measure a current of the battery unit.

19. The electric storage system according to claim 1, wherein the line concentrator is configured to control the plurality of modules.