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

• US 20120280573A1
• Filed: 09/13/2011
• Published: 11/08/2012
• Est. Priority Date: 03/25/2011
• Status: Active Grant

• Current Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Ohkura, Kazumi, Kunimitsu, Tomonori
• Granted Patent: US 8,742,619 B2
• Time in Patent Office: Days
• US Class Current: 307/80
• CPC Class Codes: H02J 2310/48 for electric vehicles [EV] or hybrid vehicles [HEV]
• CPC Class Codes: H02J 7/0016 using shunting, discharge or bypass circuits
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

One state detector detects an abnormal state or a normal state relating to charge and discharge of a battery cell group in one battery module, and generates one detection signal representing the detected state. Another state detector detects an abnormal state or a normal state relating to charge and discharge of another battery cell group in another battery module, and generates another detection signal representing the detected state. One operation processing device sends the one detection signal generated by the one state detector to an external object. Another operation processing device sends the other detection signal generated by the other state detector to the external object. The one detection signal generated by the one state detector is transmitted to at least one of the other operation processing device and the other state detector via a signal line.

Claims

1. A battery system comprising:

a first battery module;

a second battery module; and

a first communication path,

wherein said first battery module includes

a first battery cell group including one or a plurality of battery cells,

a first state detector that detects an abnormal state or a normal state relating to charge and discharge of said first battery cell group, and generates a first detection signal representing the detected state, and

a first communication circuit that sends the first detection signal generated by said first state detector to an external object,

said second battery module includes

a second battery cell group including one or a plurality of battery cells,

a second state detector that detects an abnormal state or a normal state relating to charge and discharge of said second battery cell group, and generates a second detection signal representing the detected state, and

a second communication circuit that sends the second detection signal generated by said second state detector to the external object, and

said first communication path is provided to transmit said first detection signal generated by said first state detector to at least one of said second communication circuit and said second state detector.

2. The battery system according to claim 1, wherein said first communication path transmits the first detection signal generated by said first state detector to at least one of said second communication circuit and said second state detector via said first communication circuit.

3. The battery system according to claim 1, wherein said first communication path includes

a second communication path that transmits the first detection signal generated by said first state detector to said first communication circuit, and

a third communication path that transmits the first detection signal generated by said first state detector to said second state detector.

4. The battery system according to claim 1, further comprising a fourth communication path that transmits said second detection signal generated by said second state detector to at least one of said first communication circuit and said first state detector.

5. The battery system according to claim 4, wherein said fourth communication path transmits said second detection signal generated by said second state detector to at least one of said first communication circuit and said first state detector via said second communication circuit.

6. The battery system according to claim 4, wherein said fourth communication path includes

a fifth communication path that transmits the second detection signal generated by said second state detector to said second communication circuit, and

a sixth communication path that transmits the second detection signal generated by said second state detector to said first state detector.

7. The battery system according to claim 1, further comprising a seventh communication path that transmits the second detection signal generated by said second state detector to the external object without passing through said first and second communication circuits.

8. The battery system according to claim 1, comprising

N (N is a natural number of one or more) third battery modules which are 1st to N-th third battery modules,

an eighth communication path, and

N ninth communication paths which are 1st to N-th ninth communication paths,

wherein each of said N third battery modules includes

a third battery cell group including one or a plurality of battery cells,

a third state detector that detects an abnormal state or a normal state relating to charge and discharge of said third battery cell group, and generates a third detection signal representing the detected state, and

a third communication circuit that sends the third detection signal generated by said third state detector to the external object,

said eighth communication path is provided to transmit said second detection signal generated by said second state detector in said second battery module to at least one of said third communication circuit and said third state detector in the 1st third battery module,

when N is one, the 1st ninth communication path is provided to transmit said third detection signal generated by said third state detector in said 1st third battery module to at least one of said first communication circuit and said first state detector in said first battery module,

when N is 2 or more, the i-th (i is a natural number of 1 to (N−

1)) ninth communication path is provided to transmit said third detection signal generated by said third state detector in the i-th third battery module to at least one of said third communication circuit and said third state detector in the (i+1)-th third battery module, and

the N-th ninth communication path is provided to transmit said third detection signal generated by said third state detector in the N-th third battery module to at least one of said first communication circuit and said first state detector in said first battery module.

9. An electric vehicle comprising:

the battery system according to claim 1;

a motor that is driven with electric power of said battery system; and

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

10. A movable body comprising:

the battery system according to claim 1;

a main body; and

a power source that converts the electric power from said battery system into power for moving said main body.

11. A power storage device comprising:

the battery system according to claim 1; and

a system controller that performs control relating to discharge or charge of said first and second battery modules in said battery system.

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

the power storage device according to claim 11; and

an electric power conversion device that is controlled by said system controller in said power storage device, and converts electric power between said battery system in said power storage device and said external object.