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Relay adhesion detection circuit

A technology for detecting circuits and relays, used in circuit breaker testing, instruments, measuring electricity, etc., can solve the problems of false alarms, high relay costs, safety accidents, etc. Cost savings and improved safety performance

Pending Publication Date: 2021-02-26
CSG SMART HEFEI SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

DC charging piles working in the state of relay adhesion may cause safety accidents, and it is necessary to detect the state of relay adhesion in a timely and reliable manner
Most manufacturers realize adhesion detection by selecting relays with status feedback signals. The controller in the pile judges whether there is adhesion by comparing the feedback signal with the control signal. Due to the high cost and poor stability of relays with status feedback signals, with the use of relays , the existing scheme with feedback signal is prone to false alarms, so a relay sticking detection circuit is needed

Method used

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Embodiment Construction

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them.

[0017] refer to Figure 1-4 , a relay adhesion detection circuit, including a relay K1 and a relay K2 for controlling the on-off of the output terminal of the charging pile, including a device resistor R1, a resistor R2, a resistor R3, and a resistor R4 for detecting the relay K1 and the relay K2, Resistor R5, resistor R6, electronic switch S1, electronic switch S2 and electronic switch S3; the input terminal of the electronic switch S1 is connected to the input terminal of the relay K1, the output terminal of the relay K1 is connected to the input terminal of the resistor R4, and the electronic switch S1 The output terminal is connected to the input te...

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PUM

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Abstract

The invention belongs to the technical field of charging piles, and particularly provides a relay adhesion detection circuit. According to the scheme, the circuit comprises a relay K1 and a relay K2 for controlling the on-off of the output end of a charging pile, and a device resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, an electronic switch S1, an electronic switch S2 and an electronic switch S3 for detecting the relay K1 and the relay K2. The circuit can effectively detect the adhesion conditions of various states of the relays in the charging pile,reduces the device cost, enlarges the selectable model range of the device, timely and reliably detects the adhesion fault of a single relay, saves the cost, is high in detection stability, and improves the safety performance of the charging pile.

Description

technical field [0001] The invention relates to the technical field of charging piles, in particular to a relay adhesion detection circuit. Background technique [0002] At present, the country vigorously advocates the development of electric vehicles in the new energy industry. As a vehicle that relies on electric energy, charging piles have become an essential and important supporting infrastructure equipment. Among them, DC charging piles are widely used due to their fast charging characteristics. The main circuit relay of the output power of the DC charging pile controls the disconnection between the charging power supply and the electric vehicle battery. The reliable operation of the relay is directly related to the safety of the electric vehicle charging process. DC charging piles working in the state of relay adhesion may cause safety accidents, and it is necessary to detect the state of relay adhesion in a timely and reliable manner. Most manufacturers realize adhes...

Claims

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Application Information

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IPC IPC(8): G01R31/327
CPCG01R31/3272G01R31/3275
Inventor 蔡龙海何刚鲍丙永何影
Owner CSG SMART HEFEI SCI & TECH
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