Method for controlling battery charge and discharge

• US 6,661,201 B2
• Filed: 06/18/2002
• Issued: 12/09/2003
• Est. Priority Date: 06/20/2001
• Status: Expired due to Fees

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Ueda, Toshifumi, Morishita, Nobuyasu
• Primary Examiner(s): Tso, Edward H.
• Application Number:
  US10/175,437
• Publication Number:
  US 20030001541A1
• Time in Patent Office: 539 Days
• Field of Search: 320/126, 320/127, 320/131, 320/132, 320/149, 324/436, 324/433
• US Class Current: 320/132
• CPC Class Codes: B60L 15/2045 for optimising the use of energy
• CPC Class Codes: B60L 53/11 DC charging controlled by the charging station, e.g. mode 4
• CPC Class Codes: B60L 58/10 for monitoring or controlling batteries
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H02J 7/0071 with a programmable schedule
• CPC Class Codes: H02J 7/007182 in response to battery voltage
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/64 Electric machine technologies in electromobility
• 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 10/72 Electric energy management in electromobility
• CPC Class Codes: Y02T 90/12 Electric charging stations
• CPC Class Codes: Y02T 90/14 Plug-in electric vehicles

Abstract

The present invention provides a method for controlling battery charging and discharging in which a battery is charged and discharged such that a SOC (state of charge) value of the battery is increased/decreased to a predetermined range when the SOC value of the battery is in a predetermined range; and a range of the SOC values in which charging and discharging processes are performed sequentially varies and a range of the SOC values after the charging and discharging processes also sequentially varies.

Claims

1. A method for controlling battery charging and discharging, wherein:

a battery is charged and discharged such that a SOC (state of charge) value of the battery is increased/decreased to a predetermined range when the SOC value of the battery is in a predetermined range; and

a range of the SOC values in which charging and discharging processes are performed sequentially varies and a range of the SOC values after the charging and discharging processes also sequentially varies.

2. A method for controlling battery charging and discharging according to claim 1, wherein both the range of the SOC values in which charging and discharging processes are performed and the range of the SOC values after the charging and discharging processes vary between 10% and 100%.

3. A method for controlling battery charging and discharging according to claim 1, wherein both the range of the SOC values in which charging and discharging processes are performed and the range of the SOC values after the charging and discharging processes vary in stages from a low SOC value to a high SOC value.

4. A method for controlling battery charging and discharging according to claim 1, wherein charging and discharging processes are performed such that the SOC value is decreased in stages when the range of the SOC values after the charging and discharging processes is between 40% and 100%.