Battery pack protection circuit and battery pack including a pro

Details Battery pack protection circuit and battery pack including a pro Battery pack protection circuit and battery pack including a pro

1998-10-05

2000-12-12

Tso, Edward H.

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

320136, H01M 1046

Patent

active

061603813

ABSTRACT:
A battery protection circuit for an external battery pack has a switch for controlling connection of a battery output to a load and a detector for detecting a resistance at a load output terminal. A first comparator compares the detected resistance to a predetermined maximum value, and a second comparator compares the detected resistance to a predetermined minimum value. If the detected resistance is in the range between the minimum and maximum values, a control signal is produced to enable connection of the battery output to the load. If the detected resistance is outside the range, the switch is disabled and no current can flow to the load.

REFERENCES:
patent: 3686530 (1972-08-01), BoGut
patent: 5539299 (1996-07-01), Fernandez et al.
patent: 5554919 (1996-09-01), Uchida
patent: 5617010 (1997-04-01), Higashijima et al.
patent: 5729061 (1998-03-01), Narita

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