Patent Document ID: 9157968
Application ID: 13402659
Patent Flag: 1

Claim One:
1. A system for characterizing the health of a rechargeable battery of an aircraft, comprising: a test module electrically connectable to a rechargeable battery having at least a first cell and a second cell, the test module configured to pass at least one current pulse across the battery, the test module configured to measure one or more operational parameters of the battery; a computer readable medium configured to store a standardized relationship data set for a norm battery that defines one or more relationships between a plurality of battery parameters, and one or more baseline normalization coefficients defining the relationship between the battery and the norm battery for normalizing parameters of the battery to the norm battery; and a computer processor configured to: receive the one or more measured operational parameters of said battery from the test module and retrieve the standardized relationship data set and baseline normalization coefficients from the computer readable medium, the processor configured to apply the standardized relationship data set and baseline normalization coefficients to the measured operational parameters to generate normalized operational parameter measurements, the processor further configured to calculate the state-of-health and state-of-charge of the battery based at least in part on the normalized operational parameter measurements; conduct an impedance test on the battery, determine whether power is needed by the aircraft while the impedance test is being performed, and at least partly in response to a determination that power is needed by the aircraft while the impedance test is being performed, abort the impedance test and transition the battery to a discharge state; determine whether the battery needs to be charged, at least partly in response to a determination that that battery needs to be charged, transition the battery to a charge state, and at least partly in response to a determination that power is needed by the aircraft while the battery is being charged, transition the battery to the discharge state; while the battery is in the discharged state, determine if a delta voltage between the first cell and the second cell exceeds a first amount, and at least partly in response to a determination that the delta voltage between the first cell and the second cell exceeds the first amount, cause power sharing to be implemented for the first cell and the second cell so that the first cell and the second cell discharge at substantially the same time.