Low-Voltage Connection with Safety Circuit and Method for Determining Proper Connection Polarity
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United States of America Patent
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Issued Date -
Jul 8, 2010
app pub date -
Mar 24, 2010
filing date -
Nov 28, 2008
priority date (Note) -
Abandoned
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Abstract
A safety circuit for use in low-voltage systems improves safety of and additional features to low-voltage connections. When incorporated into a battery, the circuit leaves the battery disconnected from the low-voltage system until it determines that it is safe to make a connection. When the safety circuit determines that no unsafe conditions exist and that it is safe to connect the battery, the safety circuit may connect the battery by way of a “soft start” that provides a connection over a period of time that reduces or prevents inductive voltage spikes on the low-voltage system. A method is used for detection of proper polarity of the connections between the battery and the low-voltage system. When incorporated into a jumper cable, the safety circuit provides communication abilities, can provide test abilities, and improves connection safety and functionality, such as allowing transfer of power between low-voltage systems having different voltages.
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