Gm Global Technolgoy Operations, Inc.

Matthew Darin

Shengbing Jiang

Sandeep Menon

Wade G Johnson

Brian J Ciesinski

Muralikrishnan Kailasam

A method and apparatus detecting battery drain are provided. The method includes: collecting critical data parameters from a plurality of electronic controller units (ECUs); identifying at least one ECU that is active from among the plurality of ECUs based on the critical data parameters and storing ECU snapshot data of the identified at least one ECU; determining an activity of the identified at least one ECU based on the ECU snapshot data and the critical data parameters; determining battery drain information based on at least one from among the ECU snapshot data, the critical data parameters, the activity of the identified at least one ECU, current draw information and fleet information; and outputting determined battery drain information. The method may be used to determine and isolate a root cause of battery drain by analyzing messages over a vehicle network.

Method and apparatus for detection of battery drain

A switch assembly is provided for use on a vehicle having a source of supply voltage. The assembly comprises a switching network having an input terminal configured to be coupled to the supply voltage and an output terminal. The network comprises: (1) nine series-coupled resistors coupled between the input terminal and the output terminal, each resistor having a substantially predetermined resistance; and (2) nine switches each coupled between the input terminal and the output terminal and capable of being opened and closed by an operator of the vehicle. Eight of the switches are each coupled to a different junction of adjacent resistors, and the ninth switch is coupled between the output terminal and the ninth resistor. The switch assembly further comprises a control module coupled to the output terminal for determining which, if any, of the nine switches is closed.

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Lake Orion, MI, United States of America

Matthew Darin