In-situ battery health detector and end-of-life indicator
First Claim
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1. A system for monitoring a battery in a portable electronic device, comprising:
- a load-generating apparatus configured to apply a pulse load to the battery;
a monitoring apparatus configured to determine an impedance of the battery by measuring a voltage of the battery during the pulse load; and
a management apparatus configured to;
assess a health of the battery based on the impedance by analyzing a linearity of the impedance of the battery for at least two separate charge-discharge cycles performed on the battery; and
use the assessed health to manage use of the battery in the portable electronic device.
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Abstract
Some embodiments provide a system that monitors a battery in a portable electronic device. During operation, the system applies a pulse load to the battery and determines an impedance of the battery by measuring a voltage of the battery during the pulse load. Next, the system assesses a health of the battery based on the impedance. Finally, the system uses the assessed health to manage use of the battery in the portable electronic device.
35 Citations
12 Claims
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1. A system for monitoring a battery in a portable electronic device, comprising:
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a load-generating apparatus configured to apply a pulse load to the battery; a monitoring apparatus configured to determine an impedance of the battery by measuring a voltage of the battery during the pulse load; and a management apparatus configured to; assess a health of the battery based on the impedance by analyzing a linearity of the impedance of the battery for at least two separate charge-discharge cycles performed on the battery; and use the assessed health to manage use of the battery in the portable electronic device. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A portable electronic device, comprising:
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a battery; a set of components powered by the battery; a charger configured to apply a pulse load to the battery; a monitoring apparatus configured to determine an impedance of the battery by measuring a voltage of the battery during the pulse load; and a management apparatus configured to; assess a health of the battery based on the impedance by analyzing a linearity of the impedance of the battery for at least two separate charge-discharge cycles performed on the battery; and use the assessed health to manage use of the battery in the portable electronic device. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification