Using battery orientation to control mode of operation

Details Using battery orientation to control mode of operation Using battery orientation to control mode of operation

2007-08-30

2011-11-08

Assouad, Patrick (Department: 2858)

Electricity: battery or capacitor charging or discharging

Battery or cell charging

With current sensing to detect proper battery connection

Reexamination Certificate

active

08054049

ABSTRACT:
Electrical contacts in the battery compartment of a device will permit a battery to be inserted with the “+” pole of the battery against either one of the two contacts, with the “−” pole of the battery positioned against the other contact. A polarity-sensing circuit detects the battery's orientation. If a first orientation is detected, i.e., the “+” pole of the battery is touching Contact “A” and the “−” pole of the battery is touching Contact “B”, the polarity-sensing circuit mode-of-operation1will be selected. If the second orientation is detected, i.e., the “+” pole of the battery is touching Contact “B” and the “−” pole of the battery is touching Contact “A”, mode-of-operation2will be selected. A bridge rectifier, downstream from the polarity sensor, can ensure that the other circuits in the device receive power that is polarized correctly regardless of battery orientation.

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