High-voltage double-loop safety system of electric vehicle and method thereof

A safety protection, dual-loop technology, applied in electric vehicles, electric vehicle charging technology, circuits or fluid pipelines, etc., can solve the problems of reliability, poor stability, unstable safety protection function, etc., to achieve strong reliability, improve High voltage safety and reliability, the effect of simple structure

Active Publication Date: 2009-09-30
CHERY AUTOMOBILE CO LTD
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Problems solved by technology

[0004] In the prior art, in order to realize high-voltage protection in electric or hybrid vehicles, a simple switch loop system is usually used to detect the insulation resistance between the high-voltage system and the vehicle chassis during the running of the vehicle. The insulatio

Method used

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  • High-voltage double-loop safety system of electric vehicle and method thereof
  • High-voltage double-loop safety system of electric vehicle and method thereof

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Embodiment Construction

[0020] The present invention is specifically described below in conjunction with accompanying drawing, as figure 1 It is a schematic structural diagram of the electric vehicle high-voltage double-circuit safety protection system described in the present invention. In the electric drive system of an electric vehicle or a hybrid vehicle, the voltage of the high-voltage power battery pack assembly 4 is usually as high as 300V or more, and the high-voltage power battery pack assembly 4 Output high-voltage direct current to the motor controller assembly 2, after inverting the MCU drive bridge in the motor controller assembly 2, output three-phase alternating current to the drive motor 3, and then output torque to the driving wheels through the reduction mechanism to realize driving The vehicle is running. Normally, the normal operating current of the high-voltage system on an electric vehicle will be above the level of hundreds of A, and its instantaneous short-circuit discharge cu...

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Abstract

The present invention discloses a high-voltage double-loop safety system of electric vehicle and a method thereof. The high-voltage double-loop safety system of electric vehicle comprises a hardwired control loop which is composed of a VMS vehicle controller, a motor controller assembly, a driving motor and a high-voltage power battery pack assembly through hardwired connection in series, a VMS vehicle controller which is connected in parallel in the vehicle CAN network, and a communication network control loop composed of an MCU control plate in the motor controller assembly and a BMS battery management system in the high-voltage power battery pack assembly. The control method of the invention mainly determines whether the power battery outputs high-voltage electricity through the self testing of each control system and the safety information interaction checking of CAN communication network. The high-voltage double-loop safety system of electric vehicle according to the invention can reliably realize the purpose of protection of electric vehicle or the high-voltage electric device and high-voltage power transmission line in a hybrid power vehicle and the operator safety. The safety and reliability of high-voltage electricity can be greatly increased.

Description

technical field [0001] The present invention relates to a high-voltage safety protection system used as a power system in an electric vehicle, and more specifically relates to a high-voltage safety protection system for an electric vehicle composed of a high-voltage safety hard wire control loop and a high-voltage safety network control loop. The protection system realizes the purpose of handling the high-voltage safety fault of the electric vehicle and protecting personnel. Background technique [0002] With the shortage of global oil resources and the increasingly serious environmental pollution, various energy-saving and environmentally friendly new energy vehicles are emerging, especially electric vehicles and hybrid vehicles are getting more and more attention and favor, which is mainly due to the new Advances and breakthroughs in energy, new materials, high-performance microprocessor technology, and large-capacity power battery technology have given people a new unders...

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Application Information

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IPC IPC(8): B60R16/02B60L3/04
CPCY02T90/16
Inventor 王野林伟义顾伟王跃
Owner CHERY AUTOMOBILE CO LTD
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