Ford Global Technolgoies, LLC

Cathleen Tistle

Mark Eifert

Christopher Semanson

Jeremy L Russell

Jeff Raymond Mohr

Mark J Ferrel

David Crist Gabriel

Josephine S Lee

David Anthony Symanow

Karin Lovett

James Brian Keyse

A system using a computer to be configured to perform particular actions by virtue of having software, firmware, hardware, or a combination installed. One aspect includes a system, programmed to receive a fault signal from an auxiliary battery sensor. The system also determines if a low voltage set point is greater than the main battery voltage, and sends an open switch signal to a battery isolation switch if the low voltage set point is greater than the main battery voltage value. The system will send an auxiliary set point signal to an auxiliary battery charger to maintain a low voltage. The system will receive a current signal from an auxiliary battery sensor to indicate an auxiliary battery current value. The system also determines if the auxiliary battery current is above a maximum current value, and send a disable auxiliary battery maintenance signal to the auxiliary battery charger.

System and method of maintaining high voltage battery charging with detected auxiliary battery fault

A method is provided for determining a lower voltage set-point, an upper voltage set-point, a temperature-dependent upper current set-point, a time limit value, and a lower current hysteresis threshold set-point based on a measured temperature of a battery. A charge current from a battery charging circuit is provided. If a charge voltage is above the lower voltage set-point and below the upper voltage set-point and the charge current exceeds the temperature-dependent upper current set-point, timer is started. If the timer reaches a time limit value while the charge current exceeds the temperature-dependent upper current set-point and the charge voltage is between the lower voltage set-point and the upper voltage set-point, the charge current is reduced.

Maintaining a vehicle battery

This disclosure generally relates to a system, apparatus, and method for diagnosing a vehicle battery for further charging purposes. A battery diagnostic tool is provided to receive temperature information on the vehicle battery during a vehicle battery charging operation. The temperature information is referenced to generate a temperature gradient that will be further referenced to identify temperature changes to the vehicle battery over a period of time.

Vehicle battery status detection by tracking a temperature gradient

A auto-stop/start vehicle with an engine and a battery includes at least one controller that calibrates an engine auto-stop delay time based on a state of charge (SOC) of a battery. The calibrated engine auto-stop delay time increases as the SOC of the battery decreases, and decreases as the SOC of the battery increases. The controller further initiates shutdown of an engine upon expiration of the calibrated engine auto-stop delay time.

Calibration of engine auto-stop delay times

A vehicle system according to an exemplary aspect of the present disclosure includes, among other things, a DC/DC converter bus adapted to operate at a first voltage set-point and a low voltage battery bus adapted to operate at a second voltage set-point different from the first voltage set-point.

Growing community of inventors

Manchester, MI, United States of America

Cathleen Tistle