Battery driving device, load control method, integrated circuit and load control program
First Claim
Patent Images
1. A battery-driven device that is driven by a chargeable battery, comprising:
- a storage unit operable to store therein one or more voltage thresholds in one-to-one association with one or more operations to be executed by the battery-driven device, each voltage threshold representing a voltage, immediately after a start of discharging of a battery that is fully charged, at which the voltage of the battery changes from a sharp voltage drop to a moderate voltage drop during execution of one of the operations associated therewith;
a voltage measuring unit operable to measure a voltage of the battery during the execution of one of the operations;
a specifying unit operable to specify the one of the operations being executed by the battery-driven device;
an acquisition unit operable to acquire one of the voltage thresholds that corresponds to the specified operation from the storage unit;
a voltage comparison unit operable to compare the acquired voltage threshold with the measured voltage; and
a control unit operable to control power consumption of the battery to decrease during the execution of the specified operation if the measured voltage is equal to or more than the acquired voltage threshold.
1 Assignment
0 Petitions
Accused Products
Abstract
A battery-driven device extends an operating time of a battery (a secondary battery). A battery control unit included in the battery drive-device stores therein one or more voltage thresholds, and detects a sharp voltage drop that occurs immediately after the start of discharging of a battery that is fully charged, based on the current and voltage of the battery and the stored voltage thresholds. Upon detecting a sharp voltage drop, the battery control unit decreases power consumption of the battery.
-
Citations
7 Claims
-
1. A battery-driven device that is driven by a chargeable battery, comprising:
-
a storage unit operable to store therein one or more voltage thresholds in one-to-one association with one or more operations to be executed by the battery-driven device, each voltage threshold representing a voltage, immediately after a start of discharging of a battery that is fully charged, at which the voltage of the battery changes from a sharp voltage drop to a moderate voltage drop during execution of one of the operations associated therewith; a voltage measuring unit operable to measure a voltage of the battery during the execution of one of the operations; a specifying unit operable to specify the one of the operations being executed by the battery-driven device; an acquisition unit operable to acquire one of the voltage thresholds that corresponds to the specified operation from the storage unit; a voltage comparison unit operable to compare the acquired voltage threshold with the measured voltage; and a control unit operable to control power consumption of the battery to decrease during the execution of the specified operation if the measured voltage is equal to or more than the acquired voltage threshold. - View Dependent Claims (2, 3, 4)
-
-
5. A load control method used in a battery-driven device that is driven by a chargeable battery, the battery-driven device including a storage unit operable to store therein one or more voltage thresholds in one-to-one association with one or more operations to be executed by the battery-driven device, each voltage threshold representing a voltage, immediately after a start of discharging of a battery that is fully charged, at which the voltage of the battery changes from a sharp voltage drop to a moderate voltage drop during execution of one of the operations associated therewith, the load control method comprising:
-
a voltage measuring step of measuring a voltage of the battery during the execution of one of the operations; a specifying step of specifying the one of the operations being executed by the battery-driven device; an acquisition step of acquiring one of the voltage thresholds that corresponds to the specified operation from the storage unit; a voltage comparison step of comparing the acquired voltage threshold with the measured voltage; and a control step of controlling power consumption of the battery to decrease daring the execution of the specified operation if the measured voltage is equal to or more than the acquired voltage threshold.
-
-
6. A non-transitory computer-readable recording medium storing a load control program used in a battery-driven device that is driven by a chargeable battery, the battery-driven device including a storage unit operable to store therein one or more voltage thresholds in one-to-one association with one or more operations to be executed by the battery-driven device, each voltage threshold representing a voltage, immediately after a start of discharging of a battery that is fully charged, at which the voltage of a battery changes from a sharp voltage drop to a moderate voltage drop during execution of one of the operations associated therewith, the load control program comprising:
-
a voltage measuring step of measuring a voltage of the battery during the execution of one of the operations; a specifying step of specifying the one of the operations being executed by the battery-driven device; an acquisition step of acquiring one of the voltage thresholds that corresponds to the specified operation from the storage unit; a voltage comparison step of comparing the acquired voltage threshold with the measured voltage; and a control step of controlling power consumption of the battery to decrease during the execution of the specified operation if the measured voltage is equal to or more than the acquired voltage threshold.
-
-
7. An integrated circuit used in a battery-driven device that is driven by a chargeable battery, the integrated circuit comprising:
-
a storage unit operable to store therein one or more voltage thresholds in one-to-one association with one or more operations to be executed by the battery-driven device, each voltage threshold representing a voltage, immediately after a start of discharging of a battery that is fully charged, at which the voltage of a battery changes from a sharp voltage drop to a moderate voltage drop during execution of one of the operations associated therewith; a voltage measuring unit operable to measure a voltage of the battery during the execution of one of the operations; a specifying unit operable to specify the one of the operations being executed by the battery-driven device; an acquisition unit operable to acquire one of the voltage thresholds that corresponds to the specified operation from the storage unit; a voltage comparison unit operable to compare the acquired voltage threshold with the measured voltage; and a control unit operable to control power consumption of the battery to decrease during the execution of the specified operation if the measured voltage is equal to or more than the acquired voltage threshold.
-
Specification