Storage battery memory and communication device
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United States of America Patent
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Feb 27, 1996
Issued Date -
N/A
app pub date -
May 1, 1995
filing date -
Apr 16, 1992
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Abstract
A memory device connected to a storage battery stores a battery identification code and other data such as present and maximum temperature and voltage, and information concerning the vehicle on which the battery is used. Information transfer between the battery memory device and a charger is done through the battery cables, eliminating the need for special connections. A high power, low energy pulse imposed on the battery leads may be detected at each end of the cables, in spite of the low impedance nature of large lead acid batteries. A method and apparatus for transmitting data on a pair of battery cables includes transmitting each data pulse as a plurality of short duration pulses whereby each short duration pulse is created by momentarily imposing a high power, low energy pulse at one end of the cables. These pulses are detected at the other end of the cables and are applied to a resettable multivibrator having a output pulse width slightly greater than the interval between said short duration pulses. If the output of the multivibrator is continuous during a predetermined period, a valid data pulse is recognized.
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