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Fault detection of current sensors in the range

A current sensor and current technology, applied in instruments, electrical devices, measuring devices, etc., can solve problems such as difficult to detect sensor failures

Active Publication Date: 2019-10-11
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is more difficult to detect sensor failures when the sensor provides output data within a specific and normal operating range

Method used

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  • Fault detection of current sensors in the range
  • Fault detection of current sensors in the range
  • Fault detection of current sensors in the range

Examples

Experimental program
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Embodiment Construction

[0021] This specification describes embodiments of the disclosure. It is to be understood, however, that the disclosed embodiments are merely examples and that other embodiments may be embodied in various alternative forms. The figures are not necessarily to scale; some features may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention. Those of ordinary skill in the art will appreciate that various features illustrated and described with reference to any one figure may be combined with features illustrated in one or more other figures to form embodiments not explicitly illustrated or described. The illustrated combination of features provides a representative embodiment for a typical application. However, various combinations and modific...

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Abstract

The present invention relates to in-range current sensor fault detection, and discloses a current sensor fault detection system capable of detecting a current sensor when the current sensor is operating and providing a current sensor output within a normal operating range Fault. The current sensor is monitored by at least one controller that compares the change in battery state of charge error to a predetermined threshold. The amount of change in the battery state of charge error is a first change in battery state of charge calculated by integrating battery current with respect to time and a second change in battery state of charge calculated based on battery open circuit voltage during said time difference between.

Description

technical field [0001] The present disclosure relates to detection of current sensor failure when the current sensor is operating within an effective operating range. Background technique [0002] Current sensors are used in hybrid vehicles to detect the current flowing into and out of the battery pack. The accuracy and operability of these sensors can be important in monitoring overall hybrid system operation - allowing the vehicle to meet emissions and safety requirements. Conventionally, a sensor failure is determined if the sensor provides an output outside the allowable operating range. Sensor failures are more difficult to detect when the sensor provides output data within a specified and normal operating range. [0003] Vehicles equipped with current sensors now detect faults when the sensor stops outputting data or when the output exceeds a certain operating range. Contents of the invention [0004] A current sensor failure detection strategy is disclosed that i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R35/00B60L58/10
CPCB60L3/0038B60L2240/547B60L2240/549B60L2240/80B60L2270/12G01R35/00B60W2710/08B60W10/08B60L58/12B60L58/21B60W10/26B60W2510/244B60W20/50Y02T10/70
Inventor 常晓光王旭何川乔瑟芬·S·李
Owner FORD GLOBAL TECH LLC