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Battery Emulator for SE Laptop Computer with Integrated Turn-on Feature

IP.com Disclosure Number: IPCOM000012646D
Original Publication Date: 2003-May-19
Included in the Prior Art Database: 2003-May-19
Document File: 1 page(s) / 40K

Publishing Venue

IBM

Abstract

A battery emulator for a laptop computer with integrated turn on signal circuity is presented. The target application is enterprise computer systems where a laptop is used to act as the system console. It is desirable to have the console power on with the system, and power off with the system automatically. Battery solutions are also discussed and presented against the proposed invention.

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Battery Emulator for SE Laptop Computer with Integrated Turn-on Feature

   What is proposed is a form-factor compatible capacitor/regulator assembly that replaces the system battery in a laptop computer. Additionally, there would be a jumper cable running to a remote assembly to apply a power-on signal to the appropriate pin on the docking station connector. Ideal operating behavior for this application is that the console laptop powers on with the system and conducts a proper and safe shutdown when power is abruptly removed, with no manual interaction. With a battery installed the system would remain on in the absence of a power off pulse. While this is not difficult to implement, current battery technology does not meet enterprise requirements for reliability and longevity. A large capacitor array is presented instead of a battery. This solution has acceptable reliability and longevity, as well as the ability to provide ample time for the laptop computer to detect what it thinks is a rapidly discharging battery and initiate a proper and safe shutdown.

The specific implementation of this battery emulator would be such that it was powered by the system's distributed power bus. This is a good way to make sure the console is active when the system is. Many corporations also impose the requirement that system only have a single line cord, so it is beneficial to derive power from a distributed system bus for this reason also. The total capacitance for the array is subje...