Battery pack with a remaining battery power calculating...

Details Battery pack with a remaining battery power calculating... Battery pack with a remaining battery power calculating...

2006-08-22

2006-08-22

Tibbits, Pia (Department: 2838)

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

Regulated discharging

C320S132000, C320S106000

Reexamination Certificate

active

07095212

ABSTRACT:
A battery pack has a secondary battery connected to a plus side terminal. A protective circuit protects the secondary battery from overcharge and over-discharge. A calculation circuit operates with a minus side terminal as a reference for calculating a remaining capacity of the secondary battery. An N-channel MOS transistor is connected between the secondary battery and the minus terminal for controlling charge and discharge of the secondary battery in accordance with a signal from the protective circuit. A level shifter circuit is connected between the calculation circuit and a communication terminal.

REFERENCES:
patent: 5017856 (1991-05-01), Johnson, Jr.
patent: 5493197 (1996-02-01), Eguchi et al.
patent: 5530336 (1996-06-01), Eguchi et al.
patent: 6448743 (2002-09-01), Sano et al.
patent: 2002151163 (2000-11-01), None

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