Battery overheating protection circuit

Details Battery overheating protection circuit Battery overheating protection circuit

2008-08-12

2011-10-11

Diao, M'Baye (Department: 2858)

Electricity: battery or capacitor charging or discharging

Battery or cell charging

With thermal condition detection

C320S134000, C320S136000, C320S152000

Reexamination Certificate

active

08035348

ABSTRACT:
A battery overheating protection circuit includes a thermal resistor samples the temperature of the battery and converts the temperature into a temperature voltage, a comparison circuit compares the temperature voltage with a reference voltage for judging whether the temperature of the battery is higher than the maximum reference temperatures temperature or not. If yes, the comparison circuit outputs a protection signal to drive a charging module to stop charging the battery in the charging process, and to cut off the conducting path to draw power from the battery in the discharging process. The present invention sets two different maximum reference temperatures during charging process and discharging process by a reference voltage module, which makes the maximum allowable discharging temperature is higher than the maximum allowable charging temperature.

REFERENCES:
patent: 6288883 (2001-09-01), Chen
patent: 7434985 (2008-10-01), Hsu et al.
patent: 7830124 (2010-11-01), McClure
patent: 2006/0076926 (2006-04-01), Lee
patent: 2006/0164041 (2006-07-01), Ooshita et al.
patent: 2006/0255771 (2006-11-01), Sakakibara
patent: 2007/0140031 (2007-06-01), Sako
patent: 2840470 (2006-11-01), None

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