Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1986-09-26
1988-03-29
Hickey, R. J.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
455 90, H02J 700, H01M 1046
Patent
active
047346353
ABSTRACT:
Unique battery reconditioning circuitry is described that may be advantageously utilized in a portable radio transceiver (100). Reconditioning is initiated by a microcomputer (120) in response to a pre-selected key sequence entered by way of a keyboard (114). The microcomputer (120) turns on a voltage switch (136) to deep discharge a Ni-Cad battery (118) and uses a voltage detector (140) to monitor the voltage Vb of the battery (118). The battery (118) is discharged from a nominal 7.5 V to 6 V in approximately two hours. The battery voltage Vb is converted to a digital value by the voltage detector (140). During the reconditioning process, the microcomputer (120) compares the digital value of the battery voltage Vb to a stored predetermined value to determine that the battery (118) has been discharged to 6 V. Once the battery (118) reaches 6 V, the reconditioning process is terminated and the portable radio transceiver (100) is turned off. The battery reconditioning circuitry of the present invention may be advantageously utilized in a variety of applications where portable equipment is operated from rechargeable batteries.
REFERENCES:
patent: 4302714 (1981-11-01), Yefsky
patent: 4455523 (1984-06-01), Koenck
patent: 4558270 (1985-12-01), Liautaud et al.
patent: 4560937 (1985-12-01), Finger
patent: 4575669 (1986-03-01), Brown
Video Review Mag., Apr. 1984, "Batteries and Power Packs", Meigs, p. 120.
Operating Instructions No. 68P81106C21-0 entitled "KDT Keyboard Data Terminal Battery Charger" 1984 by Motorola, Inc.
Instruction Manual No. 68P81106C36-0 entitled "KDT Keyboard Data Terminal Battery Charger" 1985 by Motorola, Inc.
Hackbart Rolland R.
Hickey R. J.
Motorola Inc.
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