Battery system, electric-powered vehicle, movable equipment, power storage device, and power source apparatus

Patent metadata

Field	Value
Publication number	US-9329239-B2
Application number	US-201214007208-A
Country	US
Kind code	B2
Filing date	Jan 26, 2012
Priority date	Mar 28, 2011
Publication date	May 3, 2016
Grant date	May 3, 2016

Abstract

The signal output circuit of the highest rank state detection section outputs an abnormal signal that is generated by the processing device when an abnormality is detected by the abnormality detection section. When no abnormality is detected, a normal signal is generated by the processing device and output as the detection signal. In each state detection section other than that of the highest rank, the signal output circuit outputs an abnormal signal generated by the processing device when an abnormality is detected by the abnormality detection section, and outputs the detection signal input from a higher rank state detection section when no abnormality is detected.

First claim

The invention claimed is:

1. A battery system comprising a plurality of battery modules,
each battery module including:
a group of battery cells including one or a plurality of battery cells; and
a state detection section provided to detect the state of the corresponding group of battery cells,

each state detection section including:
an abnormality detection section to detect abnormalities in the corresponding group of battery cells;
an abnormal signal generating section to issue abnormal signals indicating an abnormality in the corresponding group of battery cells; and
a signal output circuit that can output abnormal signals issued by the abnormal signal generating section,

wherein the plurality of battery module state detection sections are configured with a signal transmission ranking from highest to lowest rank,
the signal output circuit of the highest rank state detection section outputs the abnormal signal issued from the corresponding abnormal signal generating section when an abnormality is detected by the corresponding abnormality detection section,
the signal output circuit of each state detection section other than the highest rank state detection section outputs the abnormal signal issued from the corresponding abnormal signal generating section when an abnormality is detected by the corresponding abnormality detection section, and outputs the abnormal signal issued from a higher rank state detection section when no abnormal condition is detected by the corresponding abnormality detection section, and
each abnormal signal generating section of the plurality of state detection sections generates a pulse signal with a different duty cycle as its respective abnormal signal.

2. The battery system as recited in claim 1 , wherein parameter detection sections are included to detect parameters indicating the state of one or a plurality of battery cells in the corresponding group of battery cells, and a communication circuit is included to transmit parameters detected by the parameter detection sections to other components within or external from the battery system.

3. The battery system as recited in claim 1 , wherein the abnormal signal generating section and communication circuit of each state detection section are implemented by an arithmetic processing device.

4. The battery system as recited in claim 1 , wherein the abnormal signal generating section, selection signal generating section, and communication circuit of each state detection section are implemented by an arithmetic processing device.

5. The battery system as recited in claim 1 , wherein the abnormality detection section of each state detection section operates on power from the corresponding group of battery cells, while the abnormal signal generating section and signal output circuit of each state detection section operates on power from a power supply other than one or a plurality of the corresponding battery cells.

6. An electric-powered vehicle comprising:
the battery system as recited in claim 1 ;
a motor driven by battery system power; and
at least one driving wheel rotated by torque from the motor.

7. Movable equipment comprising:
the battery system as recited in claim 1 ;
a main unit of the movable equipment; and
a mechanical power source to convert electric power from the battery system to mechanical power to move the main unit of the movable equipment.

8. A power source apparatus that connects to other components within or external from a battery system comprising:
a power storage device recited in claim 7 ; and
a power conversion device that is controlled by the power storage device system control section to perform power conversion between the power storage device battery systems and the other components within or external from the battery system.

9. A power storage device comprising:
battery systems as recited in claim 1 ; and
a system control section that performs control related to charging and discharging the plurality of battery modules in the battery systems.

10. A battery system comprising a plurality of battery modules,
each battery module including:
a group of battery cells including one or a plurality of battery cells; and
a state detection section provided to detect the state of the corresponding group of battery cells,

each state detection section including:
an abnormality detection section to detect abnormalities in the corresponding group of battery cells;
an abnormal signal generating section to issue abnormal signals indicating an abnormality in the corresponding group of battery cells; and
a signal output circuit that can output abnormal signals issued by the abnormal signal generating section,

wherein the plurality of battery module state detection sections are configured with a signal transmission ranking from highest to lowest rank,
the signal output circuit of the highest rank state detection section outputs the abnormal signal issued from the corresponding abnormal signal generating section when an abnormality is detected by the corresponding abnormality detection section,
the signal output circuit of each state detection section other than the highest rank state detection section outputs the abnormal signal issued from the corresponding abnormal signal generating section when an abnormality is detected by the corresponding abnormality detection section, and outputs the abnormal signal issued from a higher rank state detection section when no abnormal condition is detected by the corresponding abnormality detection section, and
the abnormality detection section of each state detection section operates on power from the corresponding group of battery cells, while the abnormal signal generating section and signal output circuit of each state detection section operates on power from a power supply other than one or a plurality of the corresponding battery cells.

11. The battery system as recited in claim 10 , wherein parameter detection sections are included to detect parameters indicating the state of one or a plurality of battery cells in the corresponding group of battery cells, and a communication circuit is included to transmit parameters detected by the parameter detection sections to other components within or external from the battery system.

12. The battery system as recited in claim 10 , wherein the abnormal signal generating section and communication circuit of each state detection section are implemented by an arithmetic processing device.

13. The battery system as recited in claim 10 , wherein the abnormal signal generating section, selection signal generating section, and communication circuit of each state detection section are implemented by an arithmetic processing device.

14. An electric-powered vehicle comprising:
the battery system as recited in claim 10 ;
a motor driven by battery system power; and
at least one driving wheel rotated by torque from the motor.

15. Movable equipment comprising:
the battery system as recited in claim 10 ;
a main unit of the movable equipment; and
a mechanical power source to convert electric power from the battery system to mechanical power to move the main unit of the movable equipment.

16. A power source apparatus that connects to other components within or external from a battery system comprising:
a power storage device as recited in claim 10 ; and
a power conversion device that is controlled by the power storage device system control section to perform power conversion between the power storage device battery systems and the other components within or external from the battery syst

Assignees

• Kunimitsu Tomonori
• Ohkura Kazumi
• Sanyo Electric Co

Inventors

• Kunimitsu Tomonori
• Ohkura Kazumi

Classifications

• H02J7/63

  against overdischarge · CPC title

• H02J7/61

  against overcharge · CPC title

• H02J7/84

  Control of state of health [SOH] · CPC title

• H02J7/56

  Active balancing, e.g. using capacitor-based, inductor-based or DC-DC converters · CPC title

• H01M10/4257

  Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries · CPC title