APPARATUS AND METHOD OF DIAGNOSING CURRENT SENSOR OF ECO-FRIENDLY VEHICLE

• US 20170115370A1
• Filed: 05/25/2016
• Published: 04/27/2017
• Est. Priority Date: 10/26/2015
• Status: Abandoned Application

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: Chang, Jung Moon, Hwang, Do Sung
• Application Number:
  US15/164,433
• Publication Number:
  US 20170115370A1
• Time in Patent Office: Days
• CPC Class Codes: B60L 2240/547 Voltage
• CPC Class Codes: B60L 2240/549 Current
• CPC Class Codes: B60L 3/0038 relating to sensors
• CPC Class Codes: B60L 3/12 Recording operating variables ; Monitoring of operating variables
• CPC Class Codes: B60L 58/12 responding to state of charge [SoC]
• CPC Class Codes: G01R 35/005 Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references G01R33/0035, G01R35/002 take precedence
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

An apparatus and a method of diagnosing a current sensor of an eco-friendly vehicle is provided. A fault is detected in a current range between disconnection and short-circuit of a current sensor by monitoring whether a load using a high voltage in the eco-friendly vehicle is operated to detect a fault of the current sensor sensing an output current of a high voltage battery. The apparatus includes the current sensor configured to sense an output current of a high voltage battery and a load monitor that monitors whether a load in the eco-friendly vehicle is operated. A controller then detects an abnormality in the current sensor when the current sensor senses a current exceeding a first threshold value and the load is not operated.

Claims

1. An apparatus of diagnosing a current sensor of an eco-friendly vehicle, comprising:

a load monitor configured to monitor whether a load in the eco-friendly vehicle is operated, wherein the current sensor is configured to sense an output current of a high voltage battery; and

a controller configured to detect an abnormality in the current sensor when the current sensor senses a current exceeding a first threshold value and the load is not operated.

2. The apparatus of diagnosing a current sensor of an eco-friendly vehicle according to claim 1, wherein the load is any one of a driving motor, a low voltage direct current (DC) to DC converter (LDC), an inverter, an air conditioner compressor, and an on-board charger.

3. The apparatus of diagnosing a current sensor of an eco-friendly vehicle according to claim 1, wherein the controller is configured to reset the current sensor in response to detecting the abnormality in the current sensor.

4. The apparatus of diagnosing a current sensor of an eco-friendly vehicle according to claim 1, further comprising:

a voltage sensor configured to sense a voltage of the high voltage battery.

5. The apparatus of diagnosing a current sensor of an eco-friendly vehicle according to claim 4, wherein the controller is configured to detect the abnormality in the load when a voltage variation of the high voltage battery exceeds a second threshold value for a threshold period of time and detect the abnormality in the current sensor when the voltage variation of the high voltage battery is less than the second threshold value for the threshold period of time, when the current sensor senses the current exceeding the first threshold value and the load is not operated.

6. The apparatus of diagnosing a current sensor of an eco-friendly vehicle according to claim 5, wherein the controller is configured to reset the current sensor in response to detecting the abnormality in the current sensor.

7. A method of diagnosing a current sensor of an eco-friendly vehicle, comprising:

monitoring, by a load monitor, whether a load in the eco-friendly vehicle is operated;

sensing, by the current sensor, an output current of a high voltage battery; and

detecting, by a controller, an abnormality in the current sensor when the current sensor senses a current exceeding a first threshold value and the load is not operated.

8. The method of diagnosing a current sensor of an eco-friendly vehicle according to claim 7, wherein the load is any one of a driving motor, a LDC, an inverter, an air conditioner compressor, and an on-board charger.

9. The method of diagnosing a current sensor of an eco-friendly vehicle according to claim 7, further comprising:

resetting, by the controller, the current sensor in response to detecting the abnormality in the current sensor.

10. A method of diagnosing a current sensor of an eco-friendly vehicle, comprising:

monitoring, by a load monitor, whether a load in the eco-friendly vehicle is operated;

sensing, by the current sensor, an output current of a high voltage battery;

sensing, by a voltage sensor, a voltage of the high voltage battery; and

detecting, by a controller, an abnormality in the current sensor based on the voltage sensed by the voltage sensor when the current sensor senses a current exceeding a first threshold value and the load is not operated.

11. The method of diagnosing a current sensor of an eco-friendly vehicle according to claim 10, wherein the detection includes:

monitoring, by the controller, a voltage variation of the high voltage battery for a threshold period of time when the current sensor senses the current exceeding the first threshold value and the load is not operated;

detecting, by the controller, the abnormality in the current sensor when the voltage variation is less than a second threshold value; and

detecting, by the controller, the abnormality in the load when the voltage variation exceeds the second threshold value.

12. The method of diagnosing a current sensor of an eco-friendly vehicle according to claim 11, further comprising:

resetting, by the controller, the current sensor in response to detecting the abnormality in the current sensor.