Power Controller Cutoff Voltage Adjustment for Terminal Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Terminal devices experience repeated booting and shutting down due to varying battery voltage, leading to excessive damage and prolonged charging times, as they are shut down by the cutoff mode when the load increases, and pre-charged in a low voltage state.
Innovation Solution
A power control apparatus for terminal devices that sets a flag when shut down by the cutoff mode, using different cutoff voltages to determine whether to power on, with a higher second cutoff voltage for CPU-only operation and releasing the flag after a predetermined charging time, preventing unnecessary shutdowns and extending battery life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the system uses a fixed cutoff voltage for shutdown, then the shutdown control is simple, but the system is repeatedly shut down when load increases causing battery damage
Solution Approach 1:
The patent applies dynamics by making the cutoff voltage adjustable rather than fixed. The power controller dynamically changes the cutoff voltage based on system state: using a first cutoff voltage when the system is normally driven, and a second (higher) cutoff voltage when a shutdown has recently occurred. This dynamic adjustment prevents repeated shutdowns caused by load-induced voltage drops while maintaining simple shutdown control.
2Adaptability or versatility
If the system allows repeated booting and shutting down, then the system can adapt to voltage variations, but the battery and system are excessively damaged
Solution Approach 1:
The patent applies preliminary anti-action by setting a flag when the system shuts down and using this flag to prevent subsequent shutdowns within a predetermined period. When the flag is set, the power controller uses a higher second cutoff voltage that prevents shutdown even if voltage drops occur during operation. This preliminary protective measure stops the harmful cycle of repeated shutdowns before it can damage the battery and system.
3Loss of time
If the battery is pre-charged in a low voltage state, then the charging process starts, but the charging time is extended due to slow pre-charging rate
Solution Approach 1:
The patent applies preliminary action by ensuring the battery voltage is above the appropriate cutoff voltage before the system attempts to operate. By using a higher second cutoff voltage after recent shutdowns, the system prevents operation at low voltage states that would require lengthy pre-charging. This preliminary voltage check ensures the battery is in a suitable state for operation, avoiding extended pre-charging delays.
Data Source
AI summary
The present invention relates to a power control apparatus and method for preventing a system from being repeatedly booted and shut off by re-setting a cut-off voltage when the system is shut down by a cutoff mode. The power control apparatus of a terminal device according to the present invention comprises a power controller 30 for controlling power supplied from a battery 10 to the terminal device; and a memory 60 for storing a cutoff voltage value for shutting down a system if a voltage of the battery 10 is lower than a reference value, wherein the power controller 30 sets a flag when the system is shut down by a cutoff mode. When the system is rebooted, it is determined whether to drive the system based on an additional cutoff voltage, if the flag is set. According to the present invention, it is possible to prevent the system from being shut down by the cutoff mode after it has been driven. Therefore, there is an advantage in that the life span of the battery can be extended and the charging time of the battery can be saved.