Information handling system battery charge management to support quick start

摘要

A portable information handling system manages battery charge to maintain a minimum level that supports boot by disconnecting the battery from a battery discharge path so that battery charge is lost substantially only to self-discharge. The battery automatically reconnects to the battery discharge path if external power becomes available to charge the battery. The minimum battery charge level provides adequate power in combination with the external power to support boot of the portable information handling system to an operational state.

主权项

1. A portable information handling system comprising:
a planar housing; a processor disposed in the planar housing and operable to execute instructions to process information; a memory disposed in the planar housing and interfaced with the processor, the memory operable to store the information; a display disposed in the planar housing and interfaced with the processor and memory, the display operable to present the information as visual images; a battery disposed in the housing and operable to power the processor, memory and display; a battery switch interfaced with the battery and operable to disconnect the battery from providing power to the processor, memory and display; a power manager disposed in the housing and operable to manage power applied by the battery for powering the processor, memory and display, and operable to accept power applied from an external charger for powering the processor, memory and display, and for charging the battery; and a battery charge manager interfaced with the battery switch and power manager, the battery charge manager operable to determine a minimum battery charge level and to activate the switch to disconnect the battery at the minimum charge level; wherein the processor, memory and display have surge current operational states that draw current in excess of current available from the external charger and the minimum battery charge level comprises a battery charge reserve sufficient to supplement external charger current during the surge current operational states.