Battery protection circuit and protection method

Details Battery protection circuit and protection method Battery protection circuit and protection method

2008-10-09

2011-10-11

Diao, M'Baye (Department: 2858)

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

Regulated discharging

C320S134000

Reexamination Certificate

active

08035346

ABSTRACT:
A battery protection circuit and protection method for a rechargeable battery is provided. The rechargeable battery includes a positive voltage pin, a negative voltage pin, and a temperature sensing pin. A resistance of the temperature sensing pin varies with the temperature of the rechargeable battery. The battery protection circuit includes a temperature and voltage detection unit and a discharging unit. The temperature and voltage detection unit is coupled between the positive voltage pin and the temperature sensing pin, and configured to determine the temperature of the rechargeable battery according to the resistance of the temperature sensing pin. The discharging unit discharges the rechargeable battery when the temperature of the rechargeable battery is higher than a predetermined temperature and stops discharging the rechargeable battery when a voltage of the positive voltage pin is lower than a first predetermined value.

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patent: 5867008 (1999-02-01), Du et al.
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patent: 2001/0011884 (2001-08-01), Sakakibara
patent: 1177217 (1998-03-01), None

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