Browse Prior Art Database

Vehicle Charging Station for Portable Computers

IP.com Disclosure Number: IPCOM000112906D
Original Publication Date: 1994-Jun-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Herman, RL: AUTHOR [+5]

Abstract

Disclosed is a charging station providing three rates of charging for the batteries within a portable computer, using either the DC power supply of a vehicle or a 110/220V AC power source. The charging station includes contacts mating with corresponding contacts on the portable computer, forming the circuit necessary to charge the batteries.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 69% of the total text.

Vehicle Charging Station for Portable Computers

       Block Diagram of Vehicle Charging Station and peripherals

      Disclosed is a charging station providing three rates of
charging for the batteries within a portable computer, using either
the DC power supply of a vehicle or a 110/220V AC power source.  The
charging station includes contacts mating with corresponding contacts
on the portable computer, forming the circuit necessary to charge the
batteries.

      The lowest charging rate is a trickle charge, providing a small
charge not yielding a net positive charge when the computer is
active.  A higher charging rate exceeds the full current demand when
the computer is active, thus providing a net positive charge to the
unit.  A third condition is a "zero charge rate," which is available
if the charging station is used for other features.

      The Figure shows an example of another feature provided by the
charging station, which also contains an RS-232 serial port, so that
the charging station can act as a data handler between the portable
computer and an auxiliary I/O device, such as a modem or printer.
Furthermore, the user may lock the portable computer in the charging
station for security.

      While the charging station goes to a default trickle charging
rate when it is turned on, the charging rate subsequently provided is
controlled by means of commands from the portable computer.

      Because of the temperature variations typic...