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Fault processing method for vehicle-mounted charging system of electric vehicle

A fault handling method and on-board charging technology, applied in the direction of electric vehicle charging technology, electric vehicles, charging stations, etc., can solve the problems of poor implementability and poor fault resolution effect, and achieve strong implementability and fault resolution effect Good, the effect of improving execution efficiency

Active Publication Date: 2020-12-01
DONGFENG AUTOMOBILE COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defects and problems in the prior art that the steps are not strong in executability and the effect of troubleshooting is poor, and provide a vehicle-mounted electric vehicle with strong executability of steps and better effect of troubleshooting. High-voltage power-on method of charging system

Method used

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  • Fault processing method for vehicle-mounted charging system of electric vehicle
  • Fault processing method for vehicle-mounted charging system of electric vehicle
  • Fault processing method for vehicle-mounted charging system of electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] see figure 1 — image 3 , a fault handling method for an electric vehicle on-board charging system, including a recoverable fault strategy, wherein the recoverable fault strategy refers to: after the OBC detects a recoverable fault, the OBC first turns off the high-voltage output, and keeps the REQ switch state as on to Keep the No. 1 switch 31 closed, and then report the fault status to the BMS through the OBC_Status message, and then:

[0062] If the recoverable faults are automatically recovered within the set time (preferably 30 seconds), and the consecutive occurrences of recoverable faults do not exceed the set number of times (preferably 20), these two conditions are met at the same time, then the OBC sends an OBC_Status message to the The BMS reports the idle status, and then enters the normal charging process, and the recoverable fault strategy ends this time;

[0063] If one of the two conditions of automatic recovery of recoverable faults within the set tim...

Embodiment 2

[0066] see figure 1 — image 3 , a fault handling method for an electric vehicle on-board charging system, including a non-recoverable fault strategy, wherein the non-recoverable fault strategy refers to: after the OBC detects an unrecoverable fault, the OBC first turns off the high-voltage output, and then reports to the BMS through the OBC_Status message fault state, then detect the state of the ignition switch, if the ignition switch is in the OFF state, then make the REQ switch state OFF to disconnect the No. The module and the low-voltage power supply enter dormancy. At this time, the non-recoverable fault strategy ends;

[0067] The on-board charging system includes a power battery, AC charging equipment, OBC, VCM and BMS, and a low-voltage power supply 4 is connected between the BAT+ and BAT- interfaces on the OBC, and the CC interface and CP interface on the AC charging equipment are respectively One end of VCM and diode 5 is connected, the other end of VCM is connec...

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Abstract

The invention discloses a fault processing method for a vehicle-mounted charging system of an electric vehicle. The fault processing method comprises any one or two of a recoverable fault strategy andan unrecoverable fault strategy.The recoverable fault strategy means that after an OBC detects a recoverable fault, the OBC firstly closes high-voltage output; an REQ switch state is kept to be on soas to keep a first switch closed; a fault state is reported to a BMS through an OBC _ Status message; and then, if the two conditions that the recoverable fault is automatically recovered within theset time and the continuous occurrence frequency of the recoverable fault does not exceed the set frequency are simultaneously satisfied, reporting an idle state through an OBC _ Status message, and then normally charging is performed, or if one of the two conditions is not satisfied, an unrecoverable fault strategy is performed. According to the design, the performability is high, and the fault solving effect is good.

Description

technical field [0001] The invention relates to a fault handling design for a vehicle-mounted charging device, which belongs to the field of new energy sources, and in particular to a fault-handling method for a vehicle-mounted charging system of an electric vehicle. Background technique [0002] As the country's air quality requirements are getting higher and higher, it is also a big challenge for the automotive industry. Therefore, the development of new energy vehicles is very necessary. Now the market for new energy vehicles is growing and the development potential is huge. Electric vehicles rely on electricity as energy to drive vehicles, which can reduce the use of gasoline, which is the development trend of the automotive industry. The on-board charging system can convert household AC into high-voltage direct current to power the power battery, which flexibly solves the problem of charging electric vehicles. Therefore, on-board charging systems are currently the focus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L3/00B60L53/00B60L53/22
CPCB60L3/00B60L53/00B60L53/22Y02T10/70Y02T10/7072Y02T90/14
Inventor 肖聪汪斌黄棕金力苏磊王为才徐远林凌
Owner DONGFENG AUTOMOBILE COMPANY
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