System and method for heating back-up battery of motor vehicle emergency radio communication device when temperature is below a limit value
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United States of America Patent
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Dec 15, 2015
Grant Date -
Oct 3, 2013
app pub date -
Mar 28, 2013
filing date -
Mar 30, 2012
priority date (Note) -
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Abstract
An emergency system for a motor vehicle having an onboard power supply system which triggers in an emergency a radio emergency call regardless of the state of the on-board power supply system of the motor vehicle, including a radio communication device that triggers the emergency call, a back-up battery including one or more electrochemical cells that supply the radio communication device with electric energy, and an electric heating device supplied with power by the on-board power supply system with which the back-up battery can be heated when its temperature is below or drops below a lower limit value, wherein the electric heating device is a heating foil including heating resistors laminated between electrically insulating foils and having a thickness <2 mm, and the heating foil is arranged in a substantially planar, two-dimensional contact to the electrochemical cell(s) of the battery.
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