Safe discharge method of new-energy vehicle capacitor electricity

A new energy vehicle, safe discharge technology, applied in electric vehicles, electrical devices, vehicle components, etc., can solve problems such as discharge capacitors, and achieve the effect of improving safety and shortening discharge time.

Active Publication Date: 2013-12-18
奇瑞新能源汽车股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of how to quickly discharge the power of the capacitor in the MCU after the maintenance person

Method used

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  • Safe discharge method of new-energy vehicle capacitor electricity
  • Safe discharge method of new-energy vehicle capacitor electricity
  • Safe discharge method of new-energy vehicle capacitor electricity

Examples

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Example Embodiment

[0019] The present invention will be described in detail below with reference to the drawings.

[0020] Such as figure 1 When the vehicle is running normally, the relay S1 is in the closed state, and the battery provides the voltage V1 required by the MCU (motor control unit) to drive the motor. When the VMS (vehicle management system) detects that the battery voltage V3 is less than 13.8V, Enable DC / DC to charge the battery. The DC / DC input is connected to the MCU bus terminal. The input voltage is equal to the battery voltage V1 and the MCU bus voltage V2, that is, V1=V2.

[0021] When the whole vehicle KEY OFF (key is off), MCU and VMS detect KEY OFF and delay 500ms, relay S1 is disconnected, and the actual time required for relay S1 to disconnect is within 500ms, so MCU and VMS should delay 500ms to confirm that the relay is complete After disconnection, discharge the capacitor C1 to avoid the phenomenon of S1 sticking due to too fast discharge. At this time, the MCU applies a...

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Abstract

The invention discloses a safe discharge method of new-energy vehicle capacitor electricity. The safe discharge method includes that when a complete vehicle is subjected to KEYOFF, an MCU (motor control unit) and a VMS (vehicle management system) are delayed for 500 milliseconds to determine that a relay is completely disconnected, the MCU applies 50A of current id to a shaft D of a motor and zero current to a shaft Q to prevent a motor rotor from shaking, and the electricity stored in a capacitor of the MCU is discharged completely by applying voltage to a motor winding. By means of load discharge, time for discharge can be shortened and safety is improved.

Description

technical field [0001] The invention belongs to the field of new energy vehicle safety, relates to the safety management of capacitor power, in particular to a new energy vehicle safety control method for discharging capacitor power, and is applicable to pure electric vehicles, hybrid vehicles and fuel cell vehicles. Background technique [0002] With the development of the global economy, the consumption of oil is increasing day by day. As a non-renewable resource, oil is becoming increasingly scarce. At the same time, under environmental pollution, various energy vehicles have emerged, especially gasoline-electric hybrid vehicles and pure electric vehicles. In the form of vigorously advocating low-carbon life in the country, it is becoming more and more popular. [0003] Since the power system of pure electric vehicles is different from traditional fuel vehicles, the power system includes motors and controllers, and its main energy comes from the battery system of several ...

Claims

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Application Information

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IPC IPC(8): B60L3/00
Inventor 陈立冲蔡交明
Owner 奇瑞新能源汽车股份有限公司
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