Lithium battery health
AssigneeWorcester Polytechnic Institute
InventorsZhu Mao, Yujie Xi, Ethan Zhou
Life of this patent
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Abstract
A vibration-based non-destructive assessment technique for lithium-ion battery (LIB) health addresses a need for an early warning system to detect battery damage or malfunction that electrical signals alone may miss, particularly in the context of thermal runaway risks. A method of evaluating battery health includes applying a stimulus signal to a sensor adhered to an exterior surface of a battery cell, and receiving a vibration signal responsive to the stimulus signal indicative of a vibration of the battery cell. A computation application or instruction set computes battery health based on the vibration signal.
Claims13
A method of determining battery health, comprising:
- applying a voltage across a pair of terminals of a battery under observation;
- receiving an evaluation signal indicative of a vibration of the battery;
- and
- determining, based on the evaluation signal, a state of health of the battery.
A battery analyzer device, comprising:
- a vibration sensor affixed to an external surface of a battery;
- a signal processing server connected to the vibration sensor and configured for receiving an evaluation signal indicative of a vibration of the battery;
- and
- a comparator application configured to determine, based on the evaluation signal, a state of health of the battery.
A computer program embodying program code on a non-transitory computer readable storage medium that, when executed by a processor, performs steps for implementing a method of determining battery health, the method comprising:
- applying a voltage across a pair of terminals of a battery under observation;
- receiving an evaluation signal indicative of a vibration of the battery;
- and
- determining, based on the evaluation signal, a state of health of the battery.
Dependencies are inferred from the claim text.