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High-voltage interlock fault self-diagnosis circuit, control method and new energy vehicle

A high-voltage interlocking and self-diagnosis technology, applied in electric vehicles, vehicle components, electrical devices, etc., can solve problems that affect the fault response speed and occupy chip resources, so as to ensure the safety of users and vehicles, improve efficiency, and improve power supply reliability effect

Inactive Publication Date: 2020-12-18
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this detection device needs to use the MCU to detect the resistance value of each resistor during detection, which needs to occupy chip resources, and the MCU needs to perform calculations, thus affecting the response speed to the fault when the fault occurs.

Method used

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  • High-voltage interlock fault self-diagnosis circuit, control method and new energy vehicle
  • High-voltage interlock fault self-diagnosis circuit, control method and new energy vehicle

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Embodiment Construction

[0027] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0028] Such as figure 2 As shown, in the high-voltage system of the new energy vehicle, there are multiple high-voltage components, and the high-voltage components are connected through the low-voltage equipotential line HVIL, and the electrical connection integrity of the entire high-voltage system is monitored through HVIL.

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Abstract

The invention discloses a high-voltage interlocking fault self-diagnosis circuit, a control method and a new energy automobile. The high-voltage interlocking fault self-diagnosis circuit comprises a Vcc power supply, a low-voltage plug-in, a fault display circuit, a high-voltage contactor control circuit, a high-voltage contactor driving circuit and a current-limiting resistor. The self-diagnosiscircuit can detect the electrical connection integrity of a high-voltage loop; the abnormal high-voltage component can be accurately positioned and disconnected or connected, and meanwhile, power supply of the high-voltage component can be rapidly cut off; and the high-voltage interlocking fault self-diagnosis circuit, the control method and the new energy automobile are economical, simple, high in reliability, rapid in reaction and high in fault detection efficiency, and the safety of the user and the vehicle can be guaranteed to the greatest extent.

Description

technical field [0001] The invention relates to the technical field of automotive electronics, in particular to a high-voltage interlock fault self-diagnosis circuit, a control method and a new energy vehicle. Background technique [0002] The High Voltage Interlock (HVIL) circuit is an important part of new energy vehicles. It connects all high-voltage components in series through an equipotential line, and uses low-voltage signals to monitor the electrical integrity of all components connected to the high-voltage bus on the electric vehicle. sex. When the high voltage interlock circuit is connected normally, the voltage signal can be detected at the end of the circuit; when the high voltage interlock circuit is disconnected or not connected normally, the voltage signal will not be detected at the end of the circuit, by detecting the end of the interlock circuit The voltage signal is used to judge the on-off of the high-voltage circuit, but it is impossible to accurately l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L3/00B60L3/04
CPCB60L3/0023B60L3/04
Inventor 单成龙
Owner GREE ELECTRIC APPLIANCES INC
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