Power supply system, computer apparatus and maximum power control method
View Patent ↗In dealing with degradation in performance of a system unit due to excessive controlling by performing a power consumption control function after power consumption of the system unit actually exceeds a maximum power of a power supply apparatus, the present invention solves the above technological problems, and controls the power consumption of a system unit in a state while making full use of performance of the power supply apparatus.
1. A computer apparatus, comprising:
a system unit having a CPU for performing data processing;
a power supply apparatus connected to a commercial power supply for supplying power to the system unit;
an intelligent battery for supplying power to the system unit in a state where power consumption in the system unit exceeds a predetermined value; and
a controller having a function of communication with the intelligent battery and also having power management in the system unit executed, in a state of connecting with the power supply apparatus, based on information on discharge acquired from the intelligent battery.
2. The computer apparatus according to claim 1 , wherein:
the power management executed by the controller slows down operating speed of the CPU, and
the controller exerts control so as to restore the operating speed of the CPU after elapse of a predetermined time from the slowdown of the speed.
3. The computer apparatus according to claim 1 , further comprising a DC/DC converter for correcting variation of voltage arising when the output voltage from the power supply apparatus droops and is balanced by battery voltage of the intelligent battery.
4. A computer apparatus, comprising:
a system unit for performing data processing;
a power supply apparatus connected to a commercial power supply for supplying power to the system unit;
an intelligent battery for supplying power to the system unit in the case where power consumption in the system unit exceeds a maximum output power of the power supply apparatus;
a voltage measurement circuit for detecting that the output voltage from the power supply apparatus is lower than a predetermined voltage threshold; and
a controller for having operation of power consumption reduction in the system unit executed based on output from the voltage measurement circuit.
5. The computer apparatus according to claim 4 , further comprising a current measurement circuit for measuring an output current from the power supply apparatus, wherein, on detecting that the output current from the power supply apparatus is lower than a predetermined current threshold by using the current measurement circuit, the controller makes the system unit stop the operation of power consumption reduction and restore the previous operation.
6. A maximum power control method in the case where maximum output power from a power supply apparatus connected to a commercial power supply is smaller than maximum power consumption of a system unit for performing data processing, wherein:
power is supplied from the power supply apparatus to the system unit;
power is supplied from a battery to the system unit in a state where power consumption in the main unit exceeds a predetermined value; and
operation of power consumption reduction for the system unit is started after the power consumption of the system unit exceeds the predetermined value.
7. The maximum power control method according to claim 6 , wherein a characteristic that output voltage from the power supply apparatus droops when the power consumption of the system unit exceeds the maximum output power from the power supply apparatus is caught and execution of the operation of power consumption reduction for the system unit is started.
8. The maximum power control method according to claim 6 , wherein, on shifting from supply of power by the power supply apparatus to supply of power by the battery, variation of input voltage supplied to an inverter of a liquid crystal display provided to the system unit is corrected.
9. The maximum power control method according to claim 6 , wherein the operation of power consumption reduction slows down operating speed of the CPU performing data processing in the system unit.
10. The maximum power control method according to claim 9 , wherein the operating speed of the CPU is restored to the previous operating speed after the elapse of a predetermined time from the execution of the operation of power consumption reduction.
11. A maximum power control method in the case where maximum output power from a power supply apparatus connected to a commercial power supply is smaller than maximum power consumption of a system unit for performing data processing, wherein:
power is supplied from the power supply apparatus to the system unit;
power is supplied from a battery to the system unit in the case where power consumption in the system unit exceeds a predetermined value; and
execution of operation of power consumption reduction for the system unit is started by recognizing a discharge current from the battery.
12. The maximum power control method according to claim 11 , wherein recognition of the discharge current is to measure the current discharged from the battery inside or outside a battery pack constituting the battery.