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Overvoltage protection method and system for electric vehicle and electric vehicle

An overvoltage protection and electric vehicle technology, applied in the field of vehicles, can solve the problems of low voltage system overvoltage, increased cost and development difficulty, high DCDC reliability and safety requirements, etc., to reduce safety level requirements, ensure safety and driving Safety and cost reduction effects

Inactive Publication Date: 2019-01-29
CH AUTO TECH CORP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this technology cannot ensure that the voltage is within the normal voltage range of the low-voltage system when the hardware and system fail completely, which may lead to overvoltage of the low-voltage system
And all the low-voltage safety is guaranteed by DCDC. The reliability and safety requirements of DCDC are relatively high. The design of DCDC needs to consider more redundancy to ensure safety, which will lead to increased costs and development difficulties.

Method used

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  • Overvoltage protection method and system for electric vehicle and electric vehicle
  • Overvoltage protection method and system for electric vehicle and electric vehicle

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Embodiment Construction

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0028] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element refe...

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Abstract

The invention provides an overvoltage protection method and system for an electric vehicle and the electric vehicle. The overvoltage protection method comprises the steps of monitoring the state of alow-voltage output end of a current conversion device through a vehicle controller, and cutting off the output of the low-voltage output end of the current conversion device through the vehicle controller when the state of the low-voltage output end of the current conversion device is abnormal. The overvoltage protection method for the electric vehicle performs secondary management on low-voltageenergy of the electric vehicle, thereby realizing secondary protection, reasonably distributing safety functions to relevant components in a low-voltage energy management system, lowering the safety level requirement for DCDC, and achieving the effects of reducing the cost and optimizing the design of the system.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to an electric vehicle overvoltage protection method and system, and the electric vehicle. Background technique [0002] Electric vehicles convert the high voltage output by the power battery into low voltage through DCDC, which is used to charge the low-voltage battery and provide electrical energy for the work of electrical appliances. If the DCDC fails due to hardware or system failure, it will cause the high voltage of the power battery to be connected to the low voltage system, which will cause overvoltage and damage to the low voltage electrical equipment of the vehicle, and cause danger during driving. [0003] In view of the above problems, current related technologies usually monitor the low-voltage output and physical isolation through DCDC, so as to avoid introducing excessive high voltage into the low-voltage system. However, this technology cannot keep the voltage wit...

Claims

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Application Information

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IPC IPC(8): B60L3/00
CPCB60L3/003
Inventor 陆群付朝英
Owner CH AUTO TECH CORP CO LTD
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