BATTERY SYSTEM, ELECTRIC-POWERED VEHICLE, MOVABLE EQUIPMENT, POWER STORAGE DEVICE, AND POWER SOURCE APPARATUS

• US 20140015454A1
• Filed: 01/26/2012
• Published: 01/16/2014
• Est. Priority Date: 03/28/2011
• Status: Active Grant

• Current Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Kunimitsu, Tomonori, Ohkura, Kazumi
• Granted Patent: US 9,329,239 B2
• Time in Patent Office: Days
• US Class Current: 318/139
• CPC Class Codes: B60L 3/0046 relating to electric energy storage systems, e.g. batteries or capacitors
• CPC Class Codes: B60L 58/14 Preventing excessive discharging
• CPC Class Codes: B60L 58/15 Preventing overcharging
• CPC Class Codes: B60L 58/18 of two or more battery modules
• CPC Class Codes: G01R 31/382 Arrangements for monitoring battery or accumulator variables, e.g. SoC
• CPC Class Codes: H01M 10/4257 Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
• CPC Class Codes: H01M 10/482 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 2010/4278 Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
• CPC Class Codes: H02J 7/0019 using switched or multiplexed charge circuits
• CPC Class Codes: H02J 7/00302 Overcharge protection
• CPC Class Codes: H02J 7/00306 Overdischarge protection
• CPC Class Codes: H02J 7/005 Detection of state of health [SOH]
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

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.

Claims

1-11. -11. (canceled)

12. 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,

wherein 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, and

wherein 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.

13. The battery system as cited in claim 12, 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 the outside.

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

15. The battery system as cited in claim 12, 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.

16. The battery system as cited in claim 12, wherein 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.

17. The battery system as cited in claim 12, 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.

18. An electric-powered vehicle comprising:

the battery system as cited in claim 12;

a motor driven by battery system power; and

driving wheel(s) rotated by torque from the motor.

19. Movable equipment comprising:

the battery system as cited in claim 12;

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.

20. A power storage device comprising:

battery systems as cited in claim 12; and

a system control section that performs control related to charging and discharging the plurality of battery modules in the battery systems.

21. A power source apparatus that can connect to the outside comprising:

the power storage device as cited in claim 19; 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 outside.