DEVICE AND METHOD FOR CONTROLLING SECONDARY BATTERY
First Claim
1. A secondary battery control device used for an electronic device that is driven by power supplied from a secondary battery, wherein:
- the electronic device has a sleep mode in which supply of power to a part of circuitry of the electronic device is temporarily stopped, anda part of functions of the control device is stopped during the sleep mode, and wherein;
the control device comprises;
an acquisition section for acquiring a remaining capacity of the secondary battery during a non-sleep mode;
a calculation section for calculating, as a restoration time from the sleep mode, a time which is shorter than a full discharge time that is required for the secondary battery to be fully discharged, by using the remaining capacity of the secondary battery, which is acquired during the non-sleep mode immediately before the sleep mode, and using a discharging current value from the secondary battery during the sleep mode;
a setting section for setting the restoration time in a wake timer which functions even during the sleep mode; and
an instruction section which causes the wake timer to start when its operation mode is changed from the non-sleep mode to the sleep mode, restores its operation mode from the sleep mode to the non-sleep mode when the restoration time set in the wake timer is up, and instructs the acquisition section to reacquire the remaining capacity of the secondary battery.
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Accused Products
Abstract
A secondary battery control device having a sleep mode includes a current detection element for detecting a charging/discharging current value of a battery, a voltage detection element for detecting an open-circuit voltage value of the battery, and a control section for calculating the remaining capacity of the battery based on the detected values. When the control section enters the sleep mode, the control section sets, in a wake timer, based on the remaining battery capacity and the discharging current value at this time, an amount of time required for the remaining battery capacity to reach a predetermined value (about 5%), as an amount of time required for the control section to be restored to a normal mode. When the set amount of time has passed, the control section is restored to the normal mode, and corrects the remaining battery capacity to obtain an accurate remaining battery capacity.
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Citations
11 Claims
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1. A secondary battery control device used for an electronic device that is driven by power supplied from a secondary battery, wherein:
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the electronic device has a sleep mode in which supply of power to a part of circuitry of the electronic device is temporarily stopped, and a part of functions of the control device is stopped during the sleep mode, and wherein; the control device comprises; an acquisition section for acquiring a remaining capacity of the secondary battery during a non-sleep mode; a calculation section for calculating, as a restoration time from the sleep mode, a time which is shorter than a full discharge time that is required for the secondary battery to be fully discharged, by using the remaining capacity of the secondary battery, which is acquired during the non-sleep mode immediately before the sleep mode, and using a discharging current value from the secondary battery during the sleep mode; a setting section for setting the restoration time in a wake timer which functions even during the sleep mode; and an instruction section which causes the wake timer to start when its operation mode is changed from the non-sleep mode to the sleep mode, restores its operation mode from the sleep mode to the non-sleep mode when the restoration time set in the wake timer is up, and instructs the acquisition section to reacquire the remaining capacity of the secondary battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A secondary battery control method used for an electronic device that is driven by power supplied from a secondary battery, wherein:
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the electronic device has a sleep mode in which supply of power to a part of circuitry of the electronic device is temporarily stopped, and a part of functions of the control device is stopped during the sleep mode, and wherein; the control method comprises the steps of; acquiring a remaining capacity of the secondary battery during a non-sleep mode; calculating, as a restoration time from the sleep mode, a time which is shorter than a full discharge time that is required for the secondary battery to be fully discharged, by using the remaining capacity of the secondary battery, which is acquired during the non-sleep mode immediately before the sleep mode, and using a discharging current value from the secondary battery during the sleep mode; setting the restoration time in a wake timer which functions even during the sleep mode; and causing the wake timer to start when the operation mode is changed from the non-sleep mode to the sleep mode, restoring the operation mode from the sleep mode to the non-sleep mode when the restoration time set in the wake timer is up, and reacquiring the remaining capacity of the secondary battery. - View Dependent Claims (11)
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Specification