Patent ID: 9553465
Date: 2017-01-24
CPC Classifications: G01N,G01R,H01M,H02J,Y02E

Claim:
1. 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.