Gas gauge implementation

Details Gas gauge implementation Gas gauge implementation

1999-10-13

2000-11-28

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Battery or cell charging

With detection of current or voltage amplitude

320137, H02J 704

Patent

active

061540129

ABSTRACT:
A battery management system is provided having a battery management unit (BMU) and an integrated switch and sensor unit (SSU) for accurately measuring the charge state of a rechargeable battery and providing charge protection for the rechargeable battery. The system uses a charger unit to charge the rechargeable battery and a combination sensor switch circuit having a first and second mirror current proportional to the current used to charge and discharge the rechargeable battery. The switch function in sensor switch circuit disconnects the battery from receiving additional charge when a disconnect signal is provided. A battery management unit is used to detect conditions such as over voltage, over current, and over temperature associated with the rechargeable battery and transmit the disconnect signal to the sensor and switch unit when at least one condition is detected.

REFERENCES:
patent: 5600247 (1997-02-01), Matthews
patent: 5777454 (1998-07-01), McAndrews et al.
patent: 6047380 (2000-04-01), Nolan et al.
patent: 6052006 (2000-04-01), Talaga, Jr. et al.

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