Charging circuit for lithium-ion secondary battery and battery pack



(57)【要約】 【課題】 リチウムイオン二次電池の寿命を長くしなが ら、放電容量を大きくして使用時間を長くする。 【解決手段】 充電回路は、電池電圧を検出して満充電 を判定する充電制御回路3と、この充電制御回路3に制 御されてリチウムイオン二次電池1の充電状態を制御す るスイッチング素子4とを備える。充電制御回路3は、 リチウムイオン二次電池1を満充電と判定する設定電圧 を切り換える電圧切換回路5を備える。充電回路は、電 圧切換回路5で設定電圧を切り換えてリチウムイオン二 次電池1を充電している。
PROBLEM TO BE SOLVED: To increase the operating time of a lithium-ion secondary battery by enlarging the discharging capacity, while prolonging the life of the battery. SOLUTION: A charging circuit comprises a charging control circuit 3 that determines full charging by detecting the battery voltage and a switching element 4 that is controlled by the charging control circuit 3 and controls the charging condition of the lithium-ion secondary battery 1. The charging control circuit 3 comprises a voltage-switching circuit 5 for switching a setting voltage that determines a full charging of the lithium-ion secondary battery 1. The charging circuit charges the lithium-ion secondary battery 1 by switching the setting voltage using the voltage-switching circuit 5. COPYRIGHT: (C)2002,JPO




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Cited By (12)

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    EP-1416605-A1May 06, 2004Kabushiki Kaisha ToshibaElektronisches Gerät
    JP-2008113512-AMay 15, 2008Sony Corp, ソニー株式会社電子機器、電子機器の充電方法及びバッテリ
    JP-2008187790-AAugust 14, 2008Hitachi Koki Co Ltd, 日立工機株式会社充電装置
    JP-2011142720-AJuly 21, 2011Sony Corp, ソニー株式会社Battery pack, charging apparatus and charging system
    JP-2013537027-ASeptember 26, 2013コミッサリア ア レネルジー アトミーク エ オ エナジーズ アルタナティブス電池を充電するための方法
    US-6911804-B2June 28, 2005Matsushita Electric Industrial Co., Ltd.Mobile information apparatus, method and program for optimizing the charge state of the apparatus, and battery management server, method and program using the server to optimize the charge state of battery-powered electrical apparatus
    US-7619389-B2November 17, 2009Panasonic CorporationCharge control device for a secondary battery
    US-7977916-B2July 12, 2011Sony CorporationBattery pack
    US-8198856-B2June 12, 2012Sony CorporationElectronic apparatus, charging method therefor, and battery
    US-8508192-B2August 13, 2013Sanyo Electric Co., Ltd.Battery pack capable of calculating relative remaining capacity
    US-9780592-B2October 03, 2017Sanyo Electric Co., Ltd.Battery pack for selectively setting a high capacity mode having a high charge capacity until a full charge of a secondary battery
    WO-2015079607-A1June 04, 2015三洋電機株式会社Batterie