Secondary batteries having a protective circuit

Details Secondary batteries having a protective circuit Secondary batteries having a protective circuit

2007-01-16

2007-01-16

Dove, Tracy (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

With nonbattery electrical component electrically connected...

C429S008000, C429S062000, C429S092000, C429S121000

Reexamination Certificate

active

10262232

ABSTRACT:
A secondary battery with high safety is provided. A heater and a diode are connected in series, and a thermistor is connected in parallel with thus formed series circuit. A fuse is connected in series with thus formed parallel circuit to form a protective circuit, which is attached to an accumulator to complete a secondary battery. In the case of overcharging, the accumulator generates heat so that the thermistor heats up to increase the resistance value. As a result, the current pass through the heater, which generates heat to break the fuse. In the case of short circuit, the diode is reverse-biased and no current passes through the heater so that the fuse does not break.

REFERENCES:
patent: 5871858 (1999-02-01), Thomsen et al.
patent: 11-242966 (1999-09-01), None
patent: 2001-126903 (2001-05-01), None
patent: 2001126903 (2001-05-01), None
patent: 2002-233048 (2002-08-01), None
Patent Abstracts of Japan, publication No. 2002-233048, publication date of Aug. 16, 2002 (2 pgs.).
English Abstract of JP-11-242966, Publication dated Sep. 7, 1999.
English Abstract of JP-2001-126903, Publication dated May 11, 2001.
Office Action Dated Sep. 7, 2004 with English Translation (3 pages).

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