Invention Grant
- Patent Title: Constant current charging, followed by constant voltage charging, responsive to condition
- Patent Title (中): 恒流充电，随后进行恒压充电，响应条件
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Application No.: US12297780Application Date: 2007-04-12
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Publication No.: US08258750B2Publication Date: 2012-09-04
- Inventor: Hironori Yamada
- Applicant: Hironori Yamada
- Applicant Address: JP Tokyo
- Assignee: NEC Corporation
- Current Assignee: NEC Corporation
- Current Assignee Address: JP Tokyo
- Priority: JP2006-116673 20060420
- International Application: PCT/JP2007/058096 WO 20070412
- International Announcement: WO2007/123050 WO 20071101
- Main IPC: H02J7/00
- IPC: H02J7/00
Abstract:
A charging circuit and a charging method by the charging circuit that allow a stable charging operation are provided. The charging method of charging a battery from a charging power supply according to a constant current constant voltage charging system includes the steps of increasing a charging current for each predetermined current level step by step at a time of constant current charging, thereby performing the constant current charging, and stopping the increase of the charging current and continuing the charging maintaining a predetermined minimum chargeable voltage determined by the battery in advance, when it is detected that a supply voltage from the charging power supply has assumed the predetermined minimum chargeable voltage.
Public/Granted literature
- US20090085528A1 CHARGING CIRCUIT AND ITS CHARGE METHOD Public/Granted day:2009-04-02
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