Title:
CHARGING METHOD FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND BATTERY PACK
Document Type and Number:
WIPO Patent Application WO/2012/127775
Kind Code:
A1
Abstract:
This method charges one or more nonaqueous electrolyte secondary batteries by constant-current charging in n steps (where n is an integer of 2 or more). At this time: (1) the one or more secondary batteries are charged by a current Ic(k) until the charge voltage for each of the batteries reaches voltage Ec(k) (where k is an integer of 1 or higher and is n - 1 or less); (2) when the charge voltage for each battery reaches the voltage Ec(k), the one or more secondary batteries are charged at a current Ic(k+1), which is smaller than the current Ic(k) until the charge voltage of each of the batteries is a voltage Ec(k+1), which is higher than the voltage Ec(k); and (3) the currents Ic(k) and Ic(k+1) are set according to the usage frequency or number of charges and discharges of the one or more secondary batteries.
Inventors:
SUZUKI TATSUHIKO
NAGASAKI AKIRA
NAGASAKI AKIRA
Application Number:
PCT/JP2012/001121
Publication Date:
September 27, 2012
Filing Date:
February 20, 2012
Export Citation:
Assignee:
PANASONIC CORP (JP)
SUZUKI TATSUHIKO
NAGASAKI AKIRA
SUZUKI TATSUHIKO
NAGASAKI AKIRA
International Classes:
H01M10/44; H01M4/525; H01M10/0525
Domestic Patent References:
| WO2009150773A1 | 2009-12-17 | |||
| WO2011033700A1 | 2011-03-24 | |||
| WO2011065009A1 | 2011-06-03 | |||
| WO2011074199A1 | 2011-06-23 |
Foreign References:
| JP2005151683A | 2005-06-09 | |||
| JPH10145979A | 1998-05-29 | |||
| JPH07296853A | 1995-11-10 |
Attorney, Agent or Firm:
ISHII, Kazuo et al. (JP)
Kazuo Ishii (JP)
Kazuo Ishii (JP)
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Claims:
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