BATTERY CONTROL DEVICE, BATTERY SYSTEM, ELECTRIC VEHICLE, CHARGE CONTROL DEVICE, BATTERY CHARGER, MOVABLE BODY, POWER SUPPLY SYSTEM, POWER STORAGE DEVICE, AND POWER SUPPLY DEVICE

• US 20120313562A1
• Filed: 02/24/2011
• Published: 12/13/2012
• Est. Priority Date: 02/25/2010
• Status: Abandoned Application

• Current Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Murao, Hiroya, Kataoka, Shinya, Kirimoto, Mika
• Application Number:
  US13/580,808
• Publication Number:
  US 20120313562A1
• Time in Patent Office: Days
• US Class Current: 318/139
• 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 53/305 Communication interfaces
• CPC Class Codes: B60L 53/62 in response to charging parameters, e.g. current, voltage or electrical charge
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: B60L 58/22 Balancing the charge of battery modules
• CPC Class Codes: G01R 19/16542 for batteries charge condition monitoring in G01R31/36
• CPC Class Codes: G01R 31/3835 involving only voltage measurements
• CPC Class Codes: G01R 31/396 Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
• CPC Class Codes: H01M 10/441 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 10/482 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H02J 7/0025 Sequential battery discharge in systems with a plurality of batteries
• CPC Class Codes: H02J 7/0048 Detection of remaining charge capacity or state of charge [SOC]
• 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

Abstract

A battery control device is connected to a plurality of battery cells. The battery control device includes a voltage value calculator, a communicator, and a voltage value updater. The voltage value calculator calculates, based on a current flowing through a plurality of battery cells, a voltage of each battery cell. If the battery control device is connected to a charge control device, the communicator receives information relating to a voltage of each battery cell, which has been detected by a voltage detector in the charge control device, from the charge control device. The voltage value updater updates the voltage calculated by the voltage value calculator based on the voltage information received by the communicator.

Claims

1. A battery control device connected to a plurality of battery cells connected in series and configured to be connectable to an external device including a voltage detector that detects a voltage of each of the plurality of battery cells, the battery control device comprising:

a calculator that calculates the voltage of each battery cell based on a current flowing through said plurality of battery cells;

a receiver that receives voltage information relating to the voltage of each battery cell, which has been detected by said voltage detector, from said external device; and

an updater that updates the voltage calculated by said calculator based on said voltage information received by said receiver.

2. The battery control device according to claim 1, further comprising a range determiner that determines whether the voltage of each battery cell belongs to a predetermined voltage range or not,

wherein said calculator corrects said voltage of each battery cell based on a determination result by said range determiner.

3. The battery control device according to claim 2, wherein said range determiner determines whether the voltage of each battery cell belongs to said voltage range or not based on a comparison result between a reference voltage and the voltage of each battery cell.

4. The battery control device according to claim 1, further comprising a connection determiner that determines that said external device has been connected to said battery control device.

5. The battery control device according to claim 4, wherein said updater updates said voltage based on said voltage information in response to the determination of the connection by said connection determiner.

6. The battery control device according to claim 1, further comprising an external terminal connectable to said external device,

wherein said external terminal includes a plurality of connection terminals electrically connected to an electrode terminal of each of said plurality of battery cells.

7. The battery control device according to claim 1, further comprising an outputter that outputs information relating to a charge state of each of said plurality of battery cells.

8. A battery system comprising:

a plurality of battery cells connected in series; and

the battery control device according to claim 1 that is connected to said plurality of battery cells.

9. An electric vehicle comprising:

a plurality of battery cells connected in series;

the battery control device according to claim 1 that is connected to said plurality of battery cells;

a motor that is driven with electric power from said plurality of battery cells; and

a drive wheel that rotates with a torque generated by said motor.

10. A charge control device configured to be connectable as said external device to the battery control device according to claim 1 and a plurality of battery cells, comprising:

a voltage detector that detects a voltage of each of said plurality of battery cells; and

a transmitter that transmits voltage information relating to the voltage detected by said voltage detector to said battery control device.

11. A battery charger comprising:

a charger for charging a plurality of battery cells; and

the charge control device according to claim 10 that is configured to be connectable to said plurality of battery cells.

12. A movable body comprising:

a plurality of battery cells connected in series;

the battery control device according to claim 1 that is connected to said plurality of battery cells;

a movable main body; and

a power source that converts electric power from said plurality of battery cells into power for moving said movable main body.

13. A charging system comprising:

a plurality of battery cells connected in series;

the battery control device according to claim 1 that is connected to said plurality of battery cells; and

the battery charger according to claim 11 that is connected to said plurality of battery cells.

14. A power storage device comprising:

a plurality of battery cells connected in series;

the battery control device according to claim 1 that is connected to said plurality of battery cells; and

a system controller that performs control relating to charge or discharge of said plurality of battery cells.

15. A power supply device connectable to an external object, comprising:

the power storage device according to claim 14; and

a power conversion device that is controlled by said system controller in said power storage device and converts electric power between said plurality of battery cells in said power storage device and said external object.