Control method of low-voltage battery DC charger for pure electric vehicle without state feedback

A low-voltage battery, pure electric vehicle technology, applied in electric vehicles, electric traction, vehicle energy storage, etc., can solve the problems such as the inability of the vehicle controller to obtain feedback information, and the inability to perform fault diagnosis of the low-voltage battery DC charger. Troubleshoot problems, increase reliability

Inactive Publication Date: 2017-02-08
BEIJING ZHIXING HONGYUAN AUTOMOBILE CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] At present, there are two types of common low-voltage battery DC chargers with state feedback and without state. For low-voltage battery DC chargers with state feedback, the common control method is: the vehicle controller determines the low-voltage battery according to the power level of the high-voltage power battery. The working state of the battery DC charger, and then use the feedback information of the low-voltage battery DC charger as a basis for fault diagnosis and working state adjustment of the low-voltage battery DC charger; for the low-voltage battery DC charger without state feedback, the existing technology is basically Both are open-loop control methods, and the vehicle controller cannot obtain feedback information, so it is impossible to diagnose the fault of the low-voltage battery DC charger

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  • Control method of low-voltage battery DC charger for pure electric vehicle without state feedback
  • Control method of low-voltage battery DC charger for pure electric vehicle without state feedback
  • Control method of low-voltage battery DC charger for pure electric vehicle without state feedback

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Embodiment Construction

[0028] Such as Figure 1-4 As shown, in the embodiment of the present invention, a state-feedback low-voltage battery DC charging control method for pure electric vehicles, when the vehicle is in the high-voltage power-on state, according to the high-voltage power battery power and the voltage of the low-voltage battery, the low-voltage battery is charged according to the following steps. Battery DC charger for control:

[0029] Step 1) The vehicle controller receives the brake pedal signal, vehicle gear status, start signal, high-voltage power battery status (power, voltage, current), vehicle speed signal, and charging gun signal through the hardware interface or the vehicle CAN network;

[0030] Step 2) The vehicle controller judges that when the vehicle is at rest, the vehicle gear is in neutral, the driver steps on the brake pedal, no emergency stop switch is pressed, no charging gun signal is present, and there is a start signal, it is determined that the driver has High...

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Abstract

The invention relates to a state-feedback-free control method for a direct-current charger for pure electric vehicles. Voltage feedback of low-voltage storage batteries is introduced while the direct-current charger for the low-voltage storage batteries of the pure electric vehicles can be effectively controlled by the state-feedback-free control method, so that faults of a working state of the direct-current charger for the low-voltage storage batteries can be diagnosed. The state-feedback-free control method has the advantages that high-voltage power batteries can be safely managed, and faults of the low-voltage storage batteries and the faults of the direct-current charger for the low-voltage storage batteries can be diagnosed.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle charging, and in particular relates to a control method for a DC charger for a low-voltage storage battery of a pure electric vehicle without state feedback. Background technique [0002] With the increasing shortage of international crude oil resources and the increasingly stringent requirements on vehicle emissions caused by environmental pollution, new energy vehicles have gradually become a core research and development direction of major automobile manufacturers. In the "Twelfth Five-Year Plan", the development of new energy vehicles has become a key development project of the country, which has received great attention and strong support from the country. The National High-tech Research and Development Program (863 Program) also focuses on new energy vehicles and related projects, fully supporting the development of new energy vehicles and related industries. Under the guidance of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L11/18
CPCY02T10/70
Inventor 李忠志张君鸿姜炜王帅宇
Owner BEIJING ZHIXING HONGYUAN AUTOMOBILE CO LTD
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