Method and apparatus for controlling thermal runaway in a batter

Details Method and apparatus for controlling thermal runaway in a batter Method and apparatus for controlling thermal runaway in a batter

1995-09-01

1997-06-24

Mullen, Thomas

Communications: electrical

Condition responsive indicating system

Specific condition

340635, 340664, 307 31, 307 35, 307 38, 320 39, 320 48, G08B 2100

Patent

active

056421001

ABSTRACT:
An energy management system comprising a method and an apparatus for controlling thermal runaway in a telecommunications switching station backup battery recharging system receiving current from a power supply and delivering current through a rectifier to a battery and a load, the system having a low voltage disconnect switch capable of interrupting current to the battery. A current shunt is provided for generating a first signal having a first value representative of the current flowing through the rectifier. A current shunt is provided for generating a second signal having a second value representative of the current flowing through the load. A microprocessor is provided for calculating a third value, the third value being equal to the second value subtracted from the first value. A microprocessor is also provided for generating a third signal indicative of thermal runaway when the third value exceeds a predetermined value. A switch for interrupting current to the battery when the third signal exceeds the predetermined value may also be provided.

REFERENCES:
patent: 3940679 (1976-02-01), Brandwein et al.
patent: 4114083 (1978-09-01), Benham et al.
patent: 4451773 (1984-05-01), Papathomas et al.
patent: 4845637 (1989-07-01), Basarath et al.
patent: 5214370 (1993-05-01), Harm et al.
patent: 5304916 (1994-04-01), Le et al.
patent: 5331314 (1994-07-01), Koch

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