BATTERY PACK
First Claim
1. A battery pack comprising:
- a secondary battery;
a measurement unit for measuring a terminal voltage and a current of the secondary battery;
a protection unit for preventing the secondary battery from being overcharged when the terminal voltage measured by the measurement unit is equal to or higher than an overcharge detection voltage; and
a control unit to which the terminal voltage and current measured by the measurement unit are input, the control unit having a first operating mode and a second operating mode in which the consumed current is small, as compared to that in the first operating mode, wherein;
a voltage in a range of from a full charge voltage of the secondary battery to less than the overcharge detection voltage is defined as a voltage threshold,the control unit changes from the first operating mode to the second operating mode when a state in which a transition requirement is satisfied lasts for a predetermined period of time, andthe transition requirement is that the current measured by the measurement unit be smaller than a current threshold and the terminal voltage measured be equal to or smaller than the voltage threshold.
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Accused Products
Abstract
A battery pack having a secondary battery; a measurement unit measuring a terminal voltage and a current of the secondary battery; a protection unit preventing the secondary battery from being overcharged when the terminal voltage measured by the measurement unit is equal to or higher than an overcharge detection voltage; and a control unit receiving the terminal voltage and current measured by the measurement unit, the control unit having a first mode and a second mode in which current is less consumed than the first mode. A voltage in a range of from a full charge voltage to less than the overcharge detection voltage is defined as a voltage threshold. The control unit changes from the first mode to the second mode when a state in which a transition requirement is satisfied lasts for a predetermined period of time.
35 Citations
11 Claims
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1. A battery pack comprising:
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a secondary battery; a measurement unit for measuring a terminal voltage and a current of the secondary battery; a protection unit for preventing the secondary battery from being overcharged when the terminal voltage measured by the measurement unit is equal to or higher than an overcharge detection voltage; and a control unit to which the terminal voltage and current measured by the measurement unit are input, the control unit having a first operating mode and a second operating mode in which the consumed current is small, as compared to that in the first operating mode, wherein; a voltage in a range of from a full charge voltage of the secondary battery to less than the overcharge detection voltage is defined as a voltage threshold, the control unit changes from the first operating mode to the second operating mode when a state in which a transition requirement is satisfied lasts for a predetermined period of time, and the transition requirement is that the current measured by the measurement unit be smaller than a current threshold and the terminal voltage measured be equal to or smaller than the voltage threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification