SECONDARY BATTERY CHARGING AND DISCHARGING CONTROL METHOD

Title:

SECONDARY BATTERY CHARGING AND DISCHARGING CONTROL METHOD

Document Type and Number:

Japanese Patent JP2008277030

Kind Code:

A

Abstract:

To realize a long-time operation of a secondary battery and its long operating life while reducing burden on a user of a portable information device.

There is provided a charging and discharging control method of a secondary battery employed for the portable information device. When having connected the portable information device to an external electric power supply such as an AC adapter or the like, the method includes steps of: charging the secondary battery to a charging upper limit not exceeding a maximum rating capacity: discharging the secondary battery to a given capacity not exceeding the maximum rating capacity: and discharging a secondary battery, which has been charged to its upper limit charging capacity, to a given capacity in at least two days.

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Inventors:

ASAHI HIROYUKI

Application Number:

JP2007116926A

Publication Date:

November 13, 2008

Filing Date:

April 26, 2007

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC IND CO LTD

International Classes:

H02J7/00; H01M10/44; H02J7/04; H02J7/34

Attorney, Agent or Firm:

Fumio Iwahashi
Hiroki Naito
Daisuke Nagano

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