Gm Global Technolgoy Operations, Inc.

Zhenhui Yao

Mutasim Abdurrahman Salman

Mark William Verbrugge

Nick S Kapsokavathis

David W Walters

An electrical energy storage device is monitored by cyclically applying an electrical load thereto and monitoring voltage and current at transient portions of the cyclically applied electrical load.

Method and system for monitoring an electrical energy storage device

A method is provided for determining a cranking capability of a starting system for an internal combustion engine. An average power output of a battery is determined for the starting system during a start engine cranking interval. A temperature of the starting system is determined at an initiation of the start engine cranking interval. A predetermined average power output capability for a battery having a full state of charge at the determined temperature is looked up. A predetermined minimum average power output required of the battery for starting the respective engine at the determined temperature is looked up. A state of function based on the determined average power outputs is determined. The cranking capability of the starting system is identified in response to the determined state of function.

Cranking capability estimation for a vehicular starting system

There is provided a method and article of manufacture for monitoring an electrical energy storage device for a system. The method comprises stabilizing the electrical energy storage device. Once the device is stabilized, a discrete electrical load is cyclically applied to the electrical energy storage device and state variables of the electrical energy storage device are monitored. A resistance of the electrical energy storage device is determined, and a remaining useful life parameter of the electrical energy storage device is determined based upon the determined resistance.

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Warren, MI, United States of America

Zhenhui Yao