Impedance-based battery state estimation method
First Claim
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1. A method, comprising:
- measuring a first battery voltage of a battery of a device and a first charging current after terminating a constant current charging mode;
producing a charging impulse on the battery;
measuring a second battery voltage and a second charging current in response to terminating the constant current charging mode; and
determining an impedance of the battery on a basis of a voltage difference between the first and the second battery voltage and a difference between the first charging current and the second charging current.
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Abstract
The invention relates to a method, The method comprises measuring a first battery voltage of a battery of a device at and a first charging current after terminating a constant current charging mode and before initiating a constant voltage charging mode, producing a charging impulse on the battery, measuring a second battery voltage and a second charging current, and determining an impedance of the battery on the basis of a voltage difference between the first and the second battery voltage and a difference between the first and the second charging current. The invention further relates to an apparatus and a computer program product that perform the method.
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16 Claims
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1. A method, comprising:
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measuring a first battery voltage of a battery of a device and a first charging current after terminating a constant current charging mode; producing a charging impulse on the battery; measuring a second battery voltage and a second charging current in response to terminating the constant current charging mode; and determining an impedance of the battery on a basis of a voltage difference between the first and the second battery voltage and a difference between the first charging current and the second charging current. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus comprising at least one processor, memory including computer program code, the memory and the computer program code configured to, with the at least one processor, cause the apparatus to perform at least the following:
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measure a first battery voltage of a battery of a device and a first charging current after terminating a constant current charging mode and before initiating a constant voltage charging mode; produce a charging impulse on the battery; measure a second battery voltage and a second charging current in response to terminating the constant current charging mode; and determine an impedance of the battery on a basis of a voltage difference between the first and the second battery voltage and a difference between the first charging current and the second charging current. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification