Battery pack having a protection circuit

Details Battery pack having a protection circuit Battery pack having a protection circuit

2008-04-29

2008-04-29

Sherry, Michael (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific voltage responsive fault sensor

C320S106000, C320S139000, C320S122000

Reexamination Certificate

active

07365952

ABSTRACT:
The battery pack according to the present invention is to avoid any trouble or the like of the primary or secondary battery inside the battery pack with a simple mechanical construction when a load is intermittently connected between the external terminals of the battery pack. For this end, the battery pack includes at least the battery cell and a protection circuit for shutting off overcurrent discharge and features in the provision of shut-off holding means and releasing means. The shut-off holding means maintains discharge shut-off condition after abnormal discharge shut-off by shorting or connecting a low resistance between the external plus terminal and the external minus terminal from outside of the battery pack. The releasing means releases the shut-off condition of the shut-off holding means when a predetermined voltage is applied between the external plus terminal and the external minus terminal.

REFERENCES:
patent: 3480940 (1969-11-01), Lieser
patent: 4767977 (1988-08-01), Fasen et al.
patent: 6150797 (2000-11-01), Mukainakano
patent: 6242893 (2001-06-01), Freedman
patent: 6403261 (2002-06-01), Mitkin et al.
patent: 6563292 (2003-05-01), Fujiwara

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