Microprocessor controlled battery reconditioner for portable radio transceivers
US4734635A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 1986 |
| Grant date | Mar 29, 1988 |
| Priority date | — |
| Expiry date | Sep 26, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S320/16
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.