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Discharging method and device of a new energy vehicle motor controller

A technology for motor controllers and new energy vehicles, which is applied to electrical devices, electric vehicles, vehicle components, etc. It can solve the problems of single discharge method, long discharge time, and personal safety injuries, so as to ensure the reliability and safety of discharge performance, ensure reliable discharge, and ensure personal safety

Active Publication Date: 2022-02-15
开沃新能源汽车集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the existing discharge methods have a single way and the discharge time is long. Once an emergency occurs, it may cause harm to personal safety

Method used

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  • Discharging method and device of a new energy vehicle motor controller
  • Discharging method and device of a new energy vehicle motor controller

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings.

[0016] figure 1 It is the flow chart of the discharge method of the new energy vehicle motor controller in the embodiment of the present invention, see figure 1 , the discharge method of the new energy vehicle motor controller includes the following steps:

[0017] The vehicle controller selects to execute the normal discharge mode or the emergency discharge mode by detecting the vehicle running status.

[0018] If the normal discharge mode is executed, the battery management system controls the main relay to be disconnected, and judges whether the main relay is successfully disconnected. If the main relay is not disconnected, the discharge ends; if the main relay is disconnected, it is judged whether the electric drive system is faulty. If the electric drive system fails, report the discharge failure of the electric drive system and perform passive discharge; if th...

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Abstract

The invention discloses a discharge method and device for a motor controller of a new energy vehicle. In a conventional discharge mode, discharge reliability and safety are guaranteed through both electric drive system discharge and passive discharge; The system, accessory module, redundant discharge module, and passive discharge ensure reliable discharge through multiple channels, and realize as many discharge channels as possible at the same time, shortening the discharge time and further ensuring personal safety.

Description

Technical field: [0001] The invention relates to the technical field of electric vehicles, in particular to a discharge method and device for a motor controller of a new energy vehicle. Background technique: [0002] The motor controller, electric power steering pump, air compressor, etc. of the new energy vehicle are connected in parallel with the power battery 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. In order to meet the requirements of filtering and energy storage, DC support capacitors are permanently installed at the bus terminal of the motor controller. When the high-voltage relay is disconnected and the power battery is separated from other components, the electric energy stored in the DC support capacitor will keep the high voltage on the DC bus for a period of time. At this time, a reasonable method must be used to release the high-voltage electric energy. [0003] M...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L3/00
CPCB60L3/0084B60L3/0092
Inventor 付晓宇王扬满张振宏王春海
Owner 开沃新能源汽车集团股份有限公司