Fault detection system and method of DC/DC converter

A DC converter and fault detection technology, which is applied to electric vehicles, electric vehicle charging technology, and electrical devices, can solve problems such as increasing the cost of DCDC, and achieve the effects of improving reliability, saving costs, and reducing interference

Inactive Publication Date: 2019-05-07
HANTENG AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in terms of DCDC fault detection, the existing technology uses the VCU to communicate with the DCDC converter to realize fault detection, and installs a CAN communication chip inside the DCDC converter, which will increase the cost of DCDC.

Method used

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  • Fault detection system and method of DC/DC converter
  • Fault detection system and method of DC/DC converter

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Embodiment Construction

[0018] The specific implementation manner of the present invention will be described in further detail below by describing the best embodiment with reference to the accompanying drawings.

[0019] Such as figure 1 As shown, a fault detection system for a DC / DC converter, the DC / DC converter includes a main control module, a voltage conversion module, and a fault detection module, the main control module is connected to the voltage conversion module and the fault detection module respectively, and the main control module It is the main control chip of the DC / DC converter. The voltage conversion module is mainly the voltage conversion core of the DC / DC. It is composed of a switching tube circuit and used for voltage conversion. Fault detection, including voltage and current detection temperature fault detection and short circuit detection, etc. After the main control chip detects the fault through the detection module, it needs to send the fault information to the vehicle contro...

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Abstract

The invention discloses a fault detection system and method of a DC / DC converter. The DC / DC converter comprises a master control module, a voltage conversion module and a fault detection module. The master control module is connected with the voltage conversion module and the fault detection module. The output end of the master control module is connected with a fault diagnosis line. The master control module sends a level signal through the fault diagnosis line. A VCU detects the level signal sent through the fault diagnosis line and judges whether a fault exists in the DC / DC converter or notaccording to the high and low state of the level signal and the duration time. The system and method have the advantages that a CAN communication chip does not need to be adopted, the fault diagnosisline is directly adopted for outputting the high level, the VCU obtains the high level and conducts judgment, so that fault information is obtained, the cost of the DC / DC converter can be saved, transmission of a fault signal of the DC / DC converter is not affected, meanwhile, a storage battery is forbidden to be charged, and the situation that the storage battery is damaged due to unstable voltage in the DC / DC fault process is avoided.

Description

technical field [0001] The invention relates to the field of fault detection of automobile electrical appliances, in particular to a fault detection system and method for a storage battery DC / DC converter. Background technique [0002] In recent years, with the promotion of green travel, the concept of environmental protection and energy saving, and the crisis of petroleum energy, the new energy automobile industry has achieved rapid and effective development. Compared with traditional cars, new energy vehicles add a DCDC converter device to charge the battery, and charge the battery by changing the voltage input to the power battery. The diagnostic function of the DCDC converter can protect the performance of the battery, improve the service life of the battery, and prevent the battery from being damaged. At the same time, it can avoid accidents caused by the damage of the battery during the driving of the electric vehicle and the failure of the vehicle to drive normally. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L3/00
CPCY02T90/16
Inventor 李厚兵赵予民王福军崔新龙王军
Owner HANTENG AUTOMOBILE CO LTD
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