Battery management based on internal optical sensing

摘要

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.

主权项

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.