Electricity: battery or capacitor charging or discharging – Diverse charging or discharging rates for plural batteries
Patent
1997-08-07
1999-02-23
Tso, Edward H.
Electricity: battery or capacitor charging or discharging
Diverse charging or discharging rates for plural batteries
320160, H02J 700
Patent
active
058748237
ABSTRACT:
A controlled battery charger for appropriately executing trickle charging for an electronic apparatus incorporating more than two batteries even when output terminal voltages of the incorporated batteries differ. A battery charger of the present invention includes a trickle charging circuit serially inserted between the output terminals of the first and the second batteries. An example of the trickle charging circuit is constituted by the first zener diode whose cathode is connected to the output terminal of the first battery, and the second zener diode whose cathode is connected to the output terminal of the second battery and whose anode is connected to the anode of the first zener diode, i.e., is constituted by two zener diodes serially connected in opposing directions. A resistor may be serially inserted between the anodes of the first and the second zener diodes. When the gap between the output terminal voltages Vbat1 and Vbat2 of the first and the second batteries becomes larger than the first or the second zener voltage Vz1 or Vz2, the trickle charging circuit enters the current-carrying state. For example, when the first battery is over-discharged and the gap between the output terminal voltages Vbat1 and Vbat2 is greater than the second zener voltage Vz2, the output terminals enter the current-carrying states, and a current flows from the second battery to the first battery until the gap of the voltage level is equal to or lower than the zener voltage Vz2. As a result, trickle charging for the first battery is performed by the second battery. The resistor inserted serially between the first and the second zener diodes controls the current volume that flows between the batteries in the current-carrying state into a microcurrent appropriate for trickle charging.
REFERENCES:
patent: 4315162 (1982-02-01), Ferguson
patent: 5483144 (1996-01-01), Marek
patent: 5486749 (1996-01-01), Brainard
patent: 5635817 (1997-06-01), Shiska
patent: 5684384 (1997-11-01), Barkat et al.
Bogdon Bernard D.
International Business Machines - Corporation
Tso Edward H.
LandOfFree
Controlled battery charger for charging multiple batteries does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Controlled battery charger for charging multiple batteries, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Controlled battery charger for charging multiple batteries will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-310296