Secondary battery protection device from overcharge/overdischarg

Details Secondary battery protection device from overcharge/overdischarg Secondary battery protection device from overcharge/overdischarg

1996-12-24

1999-04-20

Wong, Peter S.

Electricity: battery or capacitor charging or discharging

Battery or cell discharging

With charging

320136, 320164, H02J 700

Patent

active

058960252

ABSTRACT:
A protection circuit device for protecting a secondary battery from an overcharge and/or an overdischarge has first and second terminals, across which a charger and a load are alternatively connectable. A first switch and/or a second switch may be provided in series with the secondary battery between the first and second terminals. In a charging operation mode, the second switch is kept conductive. A charging operation is performed with the first switch made conductive. When the battery is overcharged for some reasons, the first switch is turned off. Upon connection of a load across the first and second terminals, the first switch is restored to a conductive state for a discharging operation which releases the battery from an overdischarge state. In a discharging operation mode, the first switch is kept conductive. A discharge operation is performed with the second switch made conductive. When the battery is overdischarged, the second switch is caused to remain conductive even after commencement of the overdischarge, so that the battery can continue the discharge operation if the temporary overdischarge does not last longer than the predetermined period of time.

REFERENCES:
patent: 5493197 (1996-02-01), Eguchi et al.
patent: 5547775 (1996-08-01), Eguchi et al.
patent: 5705911 (1998-01-01), Tamai
patent: 5742148 (1998-04-01), Sudo et al.
Nikkei Electronics, No. 649, Nov. 20, 1995, pp. 100-117.

Affiliated with

Also associated with

Rating

Secondary battery protection device from overcharge/overdischarg does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Secondary battery protection device from overcharge/overdischarg, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Secondary battery protection device from overcharge/overdischarg will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2250178