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Aviation battery maintenance is trending toward on-condition maintenance. Nickel-Cadmium (NiCd), Valve Regulated Lead-Acid (VRLA), or prospective Li-ion batteries are used to start engines, provide emergency back-up power, and assure ground power capability for maintenance and pre-flight checkout. As these functions are mission essential, State of Health (SoH) recognition is critical. SoH includes information regarding battery energy, power and residual cycle life. This paper describes an SoH recognition technique for on-board aviation batteries and presents a passive diagnostic device (PDD). The PDD monitors on-board system battery current, voltage and ambient temperature and utilizes no active signals to the battery which can be restricted or even prohibited in order to avoid any interference with the vehicle electrical system.

This paper describes GEM Power's Total Battery Management System (TBMS), a new approach to the management of all battery types including aviation batteries, by means of treatment and analysis of a matrix of battery parameters (MoP). In addition to current and voltage, the MoP includes battery ohmic resistance (Rohm), chemical resistance (Rch), electrical double layer capacity (EDLC) and battery instantaneous open circuit voltage (Ei). The MoP is created by collecting the battery's stationary and transient voltage responses to specifically designed charging/depol pulses.

This paper describes a unique approach to ground and on-board diagnostics and prognostics of aviation batteries based on the sampling and analysis of the battery's intrinsic electrochemical parameters that represent its actual condition. A battery's ability to sustain required energy and power can be accurately determined, allowing replacement prior to failure.

Aviation battery maintenance is trending toward maintenance on-condition. NiCd, VRLA, or prospective Li-ion batteries are used to start engines, provide emergency back-up power, and assure ground power capability for maintenance and pre-flight checkout. As these functions are mission essential, State of Health (SoH) recognition is critical. GEM Power has developed a technological approach for SoH recognition, based on a battery equivalent schematic. The schematic is derived from a Matrix of Parameters (MoP), which includes ohm resistance, chemical resistance, electrical double layer capacity (EDLC), and open circuit voltage (OCV) [1].