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Discharging method and system for new energy vehicle

A new energy vehicle and system failure technology, applied in electric vehicles, electrical devices, vehicle components, etc., can solve the problems of long duration, high voltage state of vehicles, hidden dangers, etc., to achieve rapid discharge, improve safety performance, reduce The effect of energy consumption

Inactive Publication Date: 2015-02-18
CHONGQING CHANGAN AUTOMOBILE CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the method of connecting power resistors in parallel has the following disadvantages: on the one hand, the increased power resistors are always in working condition, which increases the energy consumption of the vehicle; state, there is a security risk

Method used

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  • Discharging method and system for new energy vehicle
  • Discharging method and system for new energy vehicle
  • Discharging method and system for new energy vehicle

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Embodiment Construction

[0036] The core of the present invention is to provide a discharge method and system for a new energy vehicle, which is used for the new energy vehicle to quickly complete the process of de-energizing the entire vehicle. In this system, when the new energy vehicle needs to be discharged, its vehicle controller first determines whether the motor system fails, and when it detects that the motor system fails, the vehicle controller sends a discharge command to An electric heater, the electric heater releases the electric energy on the DC bus through its own heating resistance according to the discharge instruction. When it is detected that the motor system is working normally, the vehicle controller sends a discharge instruction to the motor controller, and the motor controller releases the electric energy on the DC bus by driving the motor winding according to the discharge instruction.

[0037] In order to enable those skilled in the art to better understand the solutions of th...

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PUM

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Abstract

The invention discloses a discharging method and system for a new energy vehicle. When the whole vehicle needs powering down, a whole vehicle controller is adopted to determine whether a motor system of the new energy vehicle breaks down or not; when the motor system breaks down, the whole vehicle controller sends a discharging instruction to an electric heater of the new energy vehicle, so that the electric heater releases electric energy on a DC bus through its own heating resistor according to the discharging instruction. Therefore, compared with the conventional discharging method by increasing a power resistor, the discharging method, which adopts the electric heater to release the electric energy on the DC bus when the motor system breaks down, reduces energy consumption of the whole vehicle; since the resistance value of the heating resistor is quite large, the release of the electric energy on the DC bus can be quickly realized, and the safety performance of the whole vehicle is improved.

Description

technical field [0001] The invention relates to the technical field of new energy vehicle control, in particular to a discharge method and system for new energy vehicles. Background technique [0002] With the development of science and technology, the automobile industry has attracted more and more attention in industrial production and daily life, especially the development of new energy vehicles. New energy vehicles will become the development trend of the future automotive industry due to their energy saving and environmental protection features. [0003] The motor controller of the new energy vehicle, related components of the electric heater and the power battery are connected in parallel through the DC bus. The electric energy on the DC bus is provided by the power battery, and the power battery end has a high-voltage relay. When the vehicle is powered off, the high-voltage relay at the power battery terminal will be cut off. Since a large-capacity power capacitor i...

Claims

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Application Information

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IPC IPC(8): B60R16/02B60L3/00
CPCB60R16/02B60L3/00
Inventor 韩亚南孙韬薛山张辉万艳宽
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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