Battery charging methods and apparatuses

Details Battery charging methods and apparatuses Battery charging methods and apparatuses

1996-12-20

1998-10-06

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Battery or cell charging

With thermal condition detection

320153, H02J 704

Patent

active

058182047

ABSTRACT:
Techniques for controlling the charging of batteries and portable electronic devices are described. In order to avoid inclusion of a temperature sensing element within a battery pack, various techniques are described that control charging of the battery with respect to its temperature. For example, when the portable electronic device is powered on, a timer may begin counting which, after a predetermined time period, will allow an external charging device to charge the battery. Alternatively, if a temperature sensing element is provided within the device for monitoring the temperature of some other element, its monitored temperature may also be taken into account in determining when the battery is within a safe temperature range for charging. A temperature gradient measured by the temperature sensing element within the device may also be considered to counteract the impact of drastic temperature differences between the battery and the device itself.

REFERENCES:
patent: 5013993 (1991-05-01), Bhagwat et al.
patent: 5519302 (1996-05-01), Mino et al.
patent: 5627451 (1997-05-01), Takeda
patent: 5642032 (1997-06-01), Kokuga

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