BATTERY GAUGE ESTIMATION DEVICE
First Claim
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1. A battery gauge estimation device, comprising:
- an impedance element for coupling with a first terminal and a second terminal of a battery;
a first switch for coupling between the impedance element and the first terminal of the battery;
a control circuit for configuring the first switch to be intermittently conducted at a first frequency in a first period and to be intermittently conducted at a second frequency in a second period;
a current detection circuit, coupled with the impedance element, for detecting a first current flowing through the impedance element in the first period and for detecting a second current flowing through the impedance element in the second period; and
an estimation circuit for generating a remaining power estimation according to at least one of the first current, the second current, a first AC impedance of the impedance element when the first current flows through the impedance element, and a second AC impedance of the impedance element when the second current flows through the impedance element.
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Abstract
A battery gauge estimation device is disclosed, having an impedance element, a switch, a control circuit, a voltage detection circuit, and an estimation circuit. The impedance element is coupled between a first terminal and a second terminal of a battery, and the switch is coupled between the impedance element and the first terminal of the battery. The control circuit configures the switch to be intermittently conducted at a predetermined frequency. The voltage detection circuit detects the voltage difference between the terminals of the impedance element. The estimation circuit generates a remaining power estimation according to the detected voltage difference.
5 Citations
20 Claims
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1. A battery gauge estimation device, comprising:
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an impedance element for coupling with a first terminal and a second terminal of a battery; a first switch for coupling between the impedance element and the first terminal of the battery; a control circuit for configuring the first switch to be intermittently conducted at a first frequency in a first period and to be intermittently conducted at a second frequency in a second period; a current detection circuit, coupled with the impedance element, for detecting a first current flowing through the impedance element in the first period and for detecting a second current flowing through the impedance element in the second period; and an estimation circuit for generating a remaining power estimation according to at least one of the first current, the second current, a first AC impedance of the impedance element when the first current flows through the impedance element, and a second AC impedance of the impedance element when the second current flows through the impedance element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A battery gauge estimation device, comprising:
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an impedance element for coupling with a first terminal and a second terminal of a battery; a first switch for coupling between the impedance element and the first terminal of the battery; a control circuit for configuring the first switch to be intermittently conducted at a first frequency in a first period; a voltage detection circuit, coupled with the impedance element, for detecting a first voltage difference between terminals of the impedance element in the first period; and an estimation circuit for generating a remaining power estimation according to at least one of the first voltage difference and a first AC impedance of the impedance element when the first voltage difference is applied on the impedance element. - View Dependent Claims (10, 11, 12, 13)
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14. A battery gauge estimation device, comprising:
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an impedance element for coupling with a first terminal and a second terminal of a battery; a transistor for coupling between the impedance element and the first terminal of the battery; a control circuit for configuring the first switch to be conducted in a first period and configuring a voltage at a control terminal of the transistor to periodically vary at a first frequency; a voltage detection circuit, coupled with the impedance element, for detecting a first voltage difference between terminals of the impedance element in the first period; and an estimation circuit for generating a remaining power estimation according to at least one of the first voltage difference. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification