Over discharge protection circuit for a rechargeable battery

Details Over discharge protection circuit for a rechargeable battery Over discharge protection circuit for a rechargeable battery

1996-05-31

1998-03-17

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

307116, 307125, 364483, 320 2, 320 13, 361 88, 361 90, 361 92, H01H 8312

Patent

active

057290610

ABSTRACT:
An over discharge protection circuit for a rechargeable battery which prevents an over discharge of the battery in response to a current operating condition, even though the operational state of an electric/electronic apparatus is changed for the purpose of saving the power consumption. The over discharge protection circuit comprises a selector selecting a threshold voltage in response to the operating condition of the electric/electronic apparatus; a comparitor comparing the output terminal voltage of said battery with the threshold voltage selected by the selector; a switch opening or closing a power feed line along which the battery is powered; and a controller controlling the switch in response to the comparison result by the comparitor.

REFERENCES:
patent: 5049805 (1991-09-01), Celenza et al.
patent: 5191291 (1993-03-01), Taylor
patent: 5345392 (1994-09-01), Mito et al.
patent: 5442794 (1995-08-01), Wisor et al.
patent: 5477124 (1995-12-01), Tamai
patent: 5483165 (1996-01-01), Cameron et al.

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