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US 9,553,465 B2Granted
Battery management based on internal optical sensing
AssigneePalo Alto Research Center Incorporated
InventorsAjay Raghavan, Peter Kiesel, Alexander Lochbaum, Bhaskar Saha, Lars Wilko Sommer, Tobias Staudt
Life of this patent
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Abstract
A battery management system includes one or more fiber optic sensors configured to be disposed within an electrochemical battery. Each fiber optic sensor is capable of receiving input light and providing output light that varies based on the input light and an amount of free or dissolved gas present within the battery. A detector detects the output light and generates an electrical detector signal in response to the output light. Battery management circuitry determines the state of the battery based at least in part on the detector signal.
Claims26
A system, comprising:
- one or more fiber optic sensors configured to be disposed within an electrochemical battery, each fiber optic sensor configured to receive input light and to provide output light that varies based on the input light and an amount of free or dissolved gas present within the battery;
- a light source configured to provide the input light to the fiber optic sensors;
- a detector configured to detect the output light and to generate an electrical detector signal in response to the output light;
- and
- battery management circuitry configured to determine that the battery is in a first battery state based at least in part on the detector signal indicating that the amount of free or dissolved gas is at or above a first threshold and to determine that the battery is in a second battery state based at least in part on the detector signal indicating that the amount of free or dissolved gas is at or above a second threshold different from the first threshold.
2 more elements
A system, comprising:
- one or more fiber optic sensors configured to be disposed within a case of an electrochemical battery, each fiber optic sensor configured to receive input light and to provide output light that varies based on an amount of a gas present within the battery;
- a light source configured to provide the input light to the fiber optic sensors;
- a detector configured to detect the output light and to generate an electrical detector output signal in response to the output light;
- charging circuitry configured to charge the battery;
- and
- battery management circuitry configured to determine that the battery is in a first battery state based at least in part of the detector signal indicating that the amount of gas is at or above a first threshold and to determine that the battery is in a second battery state based at least in part on the detector signal indicating that the amount of gas is at or above a second threshold different from the first threshold, the battery management circuitry further configured to provide feedback information to the charging circuit to control formation of the battery electrodes based at least in part on the detector signal.
3 more elements
A method, comprising:
- optically sensing within an electrochemical battery an amount of a free or dissolved gas present within the battery;
- generating an electrical output signal in response to the sensed amount of gas;
- determining that the battery is in a first battery state based at least in part on the detector signal indicating that the amount of free or dissolved gas is at or above a first threshold;
- and
- determining that the battery is in a second battery state based at least in part on the detector signal indicating that the amount of free or dissolved gas is at or above a second threshold different from the first threshold.
2 more elements
A system, comprising:
- one or more fiber optic sensors configured to be disposed within an electrochemical battery, each fiber optic sensor configured to receive input light and to provide output light that varies based on the input light and an amount of free or dissolved gas present within the battery;
- a light source configured to provide the input light to the fiber optic sensors;
- and
- a detector configured to detect the output light and to generate an electrical detector signal in response to the output light, the electrical detector signal indicating that the battery is in a first battery state in response to a determination that the amount of free or dissolved gas is at or above a first threshold and indicating that the battery is in a second battery state in response to a determination that the amount of free or dissolved gas is at or above a second threshold different from the first threshold.
1 more element
Dependencies are inferred from the claim text.