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Power-on short circuit detection circuit for control box on charging gun cable

A detection circuit and control box technology, applied in the direction of emergency protection circuit devices, measuring electricity, measuring devices, etc., can solve problems such as danger, and achieve the effect of improving safety and improving safety performance

Pending Publication Date: 2018-02-13
绵阳高新区探索科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common disadvantage of these two types of methods is that the detection and protection circuit starts to work only after the detected end is powered on. For some high-voltage working occasions, there is a certain risk of charging first and then protecting.

Method used

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  • Power-on short circuit detection circuit for control box on charging gun cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: see figure 1 , a power-on short-circuit detection circuit for a control box on a charging gun cable, comprising a live wire and a neutral wire arranged side by side, the live wire includes a live wire input terminal L-IN and a live wire output terminal L-OUT, and the neutral wire includes a neutral wire The input terminal N-IN and the neutral line output terminal N-OUT, the live line output terminal L-OUT and the neutral line output terminal N-OUT constitute AC220-OUT, and a relay K1 and a relay K2 are respectively arranged on the live line and the neutral line;

[0026] Also includes controller, auxiliary power supply, operational amplifier, optocoupler, transistor Q1, transistor Q2, transistor Q3;

[0027] The controller includes two external ports CTR1 and CTR2, and the external port is connected to the IO port of the controller for outputting high and low levels;

[0028] The auxiliary power supply is set between the live wire and the neutral wire to gen...

Embodiment 2

[0036] Example 2: see figure 1 , in order to better illustrate the solution of the present invention, we describe it in conjunction with a specific circuit.

[0037] A power-on short-circuit detection circuit for a control box on a charging gun cable, comprising a live wire and a neutral wire arranged side by side, the live wire includes a live wire input terminal L-IN and a live wire output terminal L-OUT, and the neutral wire includes a neutral wire input The terminal N-IN and the neutral line output terminal N-OUT, L-OUT and N-OUT form the AC220V-OUT terminal, and a relay K1 and a relay K2 are respectively arranged on the line and the neutral line; it also includes a controller, an auxiliary power supply, and an operational amplifier. IC1, optocoupler IC2, transistor Q1, transistor Q2, and transistor Q3; the controller includes two external ports CTR1 and CTR2, and the external port is connected to the IO port of the controller for outputting high and low voltage Level; th...

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PUM

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Abstract

The invention discloses a power-on short circuit detection circuit for a control box on a charging gun cable. The power-on short circuit detection circuit comprises a live line, a zero line, a controller, an auxiliary power supply, an operational amplifier, an optical coupler, a triode Q1, a triode Q2 and a triode Q3 and is characterized in that the live line and the zero line are parallelly arranged, the live line comprises a live line input end and a live line output end, the zero line comprises a zero line input end and a zero line output end, and a relay K1 and a relay K2 are arranged on each of the live line and the zero line. The power-on short circuit detection circuit has the advantages that before high voltage is applied to a to-be-detected port, a low voltage excitation manner isused to detect whether short circuit occurs at the to-be-detected port or not, and protection is performed if the short circuit occurs at the to-be-detected port to prevent the high voltage from being output to the to-be-detected port; the high voltage is output to the to-be-detected port when the fact that the short circuit does not occur at the to-be-detected port is detected, safety is increased, and high-speed protection is achieved by using the fast response of the hardware manner.

Description

technical field [0001] The invention relates to a power-on protection circuit, in particular to a power-on short-circuit detection circuit for a control box on a charging gun cable. Background technique [0002] With the improvement of people's living standards, and the current trend of environmental protection, energy saving, and green ecological earth, electric vehicles are developing stronger and stronger with the strong support of the country, and their applications are becoming more and more extensive. The charging guns that match electric vehicles It also developed rapidly accordingly. [0003] Electric vehicles are charged through the charging gun cable when charging. The charging gun includes a charging gun head connected to the car, a cable control box and a charging plug. The cable control box is equipped with a charging circuit. Protective function. [0004] In the traditional method of short-circuit protection: one type is to judge whether the voltage of the de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/02H02H11/00
CPCH02H11/00G01R31/50
Inventor 杨娈
Owner 绵阳高新区探索科技有限责任公司