System and method for diagnosing relay fault
AssigneeLG Energy Solution, Ltd.
InventorYou Seob Gil
Life of this patent
Estimating the term…
Abstract
A relay abnormality diagnosis system and method capable of diagnosing an abnormality of a relay by directly connecting a diagnosis resistor to a current measurement unit and by using a current input to the current measurement unit from the diagnosis resistor and a current flowing on an electric circuit measured by the current measurement unit, in the relay abnormality diagnosis system that diagnoses the abnormality of the relay using the diagnosis resistor.
Claims14
A relay abnormality diagnosis system configured to diagnose an abnormality of a relay positioned on an electric circuit between a battery and a load, the relay abnormality diagnosis system comprising:
- a connector having a first end configured to electrically connect a current path parallel to the load at a point between the relay and the load and a second end connected to the current path;
- a current measurement circuit configured to measure each of (i) a current flowing on the electric circuit between the battery and the relay and (ii) a current flowing on the current path;
- a resistor positioned on the current path;
- a switch positioned on the current path and configured to switchably connect or disconnect the relay and the current measurement circuit;
- and
- a control circuit configured to:
- control a connection between the relay and the current measurement circuit via the switch, and
- diagnose an abnormality of the relay based on a current input to the current measurement circuit over the current path and a measured current flowing on the electric circuit.
A relay abnormality diagnosis method comprising:
- measuring, by a current measurement circuit, each of (i) a current flowing on an electric circuit between a battery and a relay positioned between the battery and a load, and (ii) a current flowing on a current path connected to the electric circuit parallel to the load through a connector, the current path having a resistor and a switch positioned thereon;
- switchably controlling, by a control circuit, a connection between a relay positioned on the electric circuit and the current measurement circuit, via the switch;
- and
- diagnosing, by the control circuit, an abnormality of the relay based on a current input to the current measurement circuit over the current path and a measured current flowing on the electric circuit.
Dependencies are inferred from the claim text.