Electric power supply system

Abstract

According to one embodiment, an electric power supply system includes a processor, a power circuit and an embedded controller. The processor includes a first controller configured to modify an operating frequency of the processor and a second controller configured to modify an operating power of the processor. The power circuit and the embedded controller detect a presence or an absence of a battery in parallel. The power circuit instructs the first controller to modify the operating frequency when removal of the battery is detected. The embedded controller causes the second controller to modify the operating power via a Basic Input/Output System (BIOS) when the removal of the battery is detected, and causes the first controller to stop modify the operating power via the power circuit.

What is claimed is: 
     
         1 . An electric power supply system comprising:
 a power circuit that creates a third power to output to a load using a first power from an adaptor and a second power from a battery, and outputs the third power to the load; and   an embedded controller that determines a type of the adaptor based at least in part on a voltage value of the first power, wherein   the embedded controller sets an input current limit value according to the type of the adaptor, the input current limit value being applied to monitor a current value of the first power; the current value of the first power monitored by the power circuit.   
     
     
         2 . The electric power supply system of  claim 1 , wherein
 the embedded controller sets the input current limit value to the power circuit, and   the power circuit creates the third power by supplementing with the second power from the battery when detecting that the power consumed by the load exceeds the input current limit value.   
     
     
         3 . The electric power supply system of  claim 2 , further comprising:
 a processor that comprises a first controller configured to modify an operating frequency of the processor and a second controller configured to modify an operating power of the processor;   wherein the embedded controller that detects presence or absence of the battery at least partially in parallel with detection by the power circuit,   the power circuit instructs the first controller to modify the operating frequency, and instructs the first controller to stop modifying the operating frequency according to an instruction from the embedded controller when the power circuit detects removal of the battery, and   the embedded controller causes the second controller to modify the operating power by notifying a Basic Input/Output System (BIOS) of removal of the battery when the embedded controller detects the removal of the battery, and instructs the power circuit to instruct the first controller to stop modifying the operating frequency of the processor after causing the second controller to modify the operating power, the BIOS comprising a program executed by the processor.   
     
     
         4 . The electric power supply system of  claim 2 , further comprising:
 a processor that operates by power at a first set value in a normal mode, and operates by power at a second set value greater than the first set value in a high-load mode, wherein   the power circuit that outputs the third power to the load comprising the processor and a predetermined device; and   the embedded controller that detects presence or absence of the battery, and notifies a Basic Input/Output System (BIOS) of removal of the battery and shuts down supply of power to the predetermined device in response to detecting the absence of the battery, the BIOS being a program executed by the processor,   wherein notification of the removal of the battery causes the BIOS to update at least one of the first set value or the second set value to lower at least one of the first set value or the second set value, and   wherein shutdown of the power supply to the predetermined device is performed within a short period of time as compared with the update of the at least one of the first set value or the second set value caused by the notification of the removal of the battery.   
     
     
         5 . The electric power supply system of  claim 4 , wherein
 the embedded controller detects a remaining battery level of the battery,   the embedded controller notifies the BIOS of the remaining battery level of the battery and shuts down the supply of power to the predetermined device when the remaining battery level of the battery falls below a reference value,   the notification of the remaining battery level of the battery causes the BIOS to update at least one of the first set value and the second set value to lower at least one of the first set value and the second set value, and   the shutdown of the power supply to the predetermined device is performed within a short period of time as compared with the update of the at least one of the first set value or the second set value caused by the notification of the remaining battery level of the battery.