CHARGE AND DISCHARGE CONTROL METHOD OF NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

Title:

CHARGE AND DISCHARGE CONTROL METHOD OF NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

Document Type and Number:

Japanese Patent JP2005085566

Kind Code:

A

Abstract:

To reduce deterioration of capacity due to charge and discharge cycle in a non-aqueous electrolyte secondary battery, or in a battery pack combining a plurality of these as a unit cell, which comprises a positive electrode that has a layer structure and contains, as a positive electrode active material, a lithium transition metal complex oxide containing at least Ni and Mn as a transition metal and a negative electrode that contains a carbon material as a negative electrode active material and has the initial charge and discharge efficiency higher than that of the positive electrode.

By a control circuit 3 incorporated in an equipment using a secondary battery or a battery pack, or in the secondary battery or the battery pack, the voltage of the unit cell constituting the secondary battery or battery pack is monitored, and the discharge is controlled so that the discharge termination voltage of each battery 1 may be 2.9 V or more.

Inventors:

KINOSHITA AKIRA
TODE SHINGO
TAKAHASHI YASUFUMI
FUJIMOTO HIROYUKI
NAKANE IKURO
FUJITANI SHIN

Application Number:

JP2003315137A

Publication Date:

March 31, 2005

Filing Date:

September 08, 2003

Export Citation:

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Assignee:

SANYO ELECTRIC CO

International Classes:

H01M10/05; H01M4/505; H01M4/525; H01M10/42; H01M10/44; H02J7/00; (IPC1-7): H01M10/44; H01M4/02; H01M4/58; H01M10/40

Domestic Patent References:

JP2002044875A	2002-02-08
JP2002176108A	2002-06-21
JP3244314B2	2002-01-07

Attorney, Agent or Firm:

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