CN106129953A - Leakage protection structure of charging pile - Google Patents

Abstract

The utility model provides a fill electric pile's earth leakage protection structure, is including filling electric pile body and charging cable, fills the output and the charging cable connection of this internal electric pile power of filling the electric pile the outside of charging cable be equipped with flexible cable shielding layer, be equipped with the insulating layer on the surface of this cable shielding layer. The cable shielding layer is connected with an electric leakage detection module, the output end of the electric leakage detection module is connected with the input end of a microprocessor, and the output end of the microprocessor is connected with the control end of a circuit breaker connected between a charging pile power supply and a charging cable. The invention has the beneficial effects that: by adding the shielding layer on the charging cable and detecting the electric leakage of the shielding layer, the power supply is cut off in time when the charging cable has small electric leakage, so that safety accidents are effectively prevented; in addition, the reliability and the safety are further improved by taking double-layer leakage protection measures for the shell of the charging pile. Simple structure, low cost, easy realization, good use effect and popularization and application.

Description

Leakage protection structure of charging pile

technical field

The invention relates to a leakage protection structure of a charging pile, which is used for the safety protection of the charging pile.

Background technique

Electric vehicles have little pollution to ambient air and noise, and have been rapidly developed, becoming the preferred means of transportation in cities and villages. In order to adapt to the rapid development of electric vehicles, a large number of charging piles need to be built, and the safety of charging piles is on the agenda. In order to prevent the leakage of the charging pile, a leakage protector is generally installed. By detecting the small leakage of the charging pile body, the controller cuts off the power supply of the charging pile to prevent the occurrence of safety accidents. The disadvantage of this protection device is that it has no protection function for the leakage of the charging cable, and the safety factor is not high.

Contents of the invention

The invention proposes a leakage protection structure of a charging pile to solve the problems in the prior art that there is no protection function for the leakage of a charging cable and the safety factor is not high.

The technical solution adopted in the present invention: a leakage protection structure of a charging pile, including a charging pile body and a charging cable, the output end of the charging pile power supply in the charging pile body is connected to the charging cable, and it is characterized in that, in the A flexible cable shielding layer is provided on the outside of the charging cable, and an insulating layer is provided outside the cable shielding layer. The cable shielding layer is connected to a leakage detection module, and the output terminal of the leakage detection module is connected to a The input end of the microprocessor is connected, and the output end of the microprocessor is connected with the control end of the circuit breaker connected between the charging pile power supply and the charging cable.

The cable shielding layer is composed of braided wire mesh.

An insulating layer is provided outside the casing of the charging pile body, and a casing shielding layer is provided outside the insulating layer. The casing shielding layer is connected to another leakage detection module, and the output terminal of the leakage detection module is connected to the leakage detection module. The other input terminal of the microprocessor is connected.

The beneficial effects of the present invention are: by adding a shielding layer to the charging cable and performing leakage detection on the shielding layer, the power supply is cut off in time when there is a small leakage in the charging cable, effectively preventing the occurrence of safety accidents; The double-layer leakage protection measures of the shell of the pile further improve the reliability and safety. The structure is simple, the cost is low, the realization is easy, the use effect is good, and its popularization and application.

Description of drawings

Fig. 1 is a schematic block diagram of the overall structure of an embodiment of the present invention;

Fig. 2 is a schematic block diagram of the overall structure of another embodiment of the present invention.

detailed description

Referring to Fig. 1, the first embodiment of a leakage protection structure of a charging pile according to the present invention includes a charging pile body and a charging cable 3, and the output end of the charging pile power supply 1 in the charging pile body is connected to the charging cable through a circuit breaker 2 3 connections. A cable shielding layer 6 composed of wire mesh is arranged on the outside of the charging cable 3, and an insulating layer 7 (rubber layer) is arranged on the outside of the cable shielding layer 6. The cable shielding layer 6 and a The leakage detection module 4 is connected, the output terminal of the leakage detection module 4 is connected with the input terminal of the microprocessor 5 , and the output terminal of the microprocessor 5 is connected with the control terminal of the circuit breaker 2 .

Referring to Fig. 2, the second embodiment of the present invention is based on the previous embodiment, an insulating layer is provided outside the casing of the charging pile body, and a casing shielding layer 8 is arranged outside the insulating layer. The casing shielding layer 8 is connected to another leakage detection module 9 , and the output terminal of the leakage detection module 9 is connected to the other input terminal of the microprocessor 5 .

The leakage detection module 4 and the leakage detection module 9 of the present invention can adopt the leakage current detection part of a conventional leakage protector.

The working principle of the present invention is that when there is a small leakage (such as a few microamps, which can be set) between the charging cable 3 and the cable shielding layer 6, the leakage detection module 4 sends the detected leakage current signal to the microprocessor 5. The output of the microprocessor 5 controls the circuit breaker 2 to cut off the charging pile power supply 1 . Since the cable shielding layer 6 completely wraps the charging cable 3, as long as any part of the charging cable 3 leaks electricity, the microprocessor 5 controls the circuit breaker 2 to cut off the charging pile power supply 1, which greatly improves the safety. For the second embodiment, leakage detection is also added to the shielding layer 8 of the casing, the control process is the same as that of the first embodiment, and a safety protection measure is added to further improve safety.

Claims (3)

1. a leakage protection structure for charging pile, including charging pile body and charge cable, the intrinsic charging pile of charging pile The outfan of power supply is connected with charge cable, it is characterised in that be provided with flexible cable in the outside of described charge cable Screen layer, is provided with insulating barrier in the outside of this cable shielding layer, and this cable shielding layer and a detection of electrical leakage module connect, this electric leakage The input of the outfan of detection module and a microprocessor connects, the outfan of this microprocessor be connected to charging pile power supply With the control end of the chopper between charge cable connects.

2. according to the leakage protection structure of the charging pile described in claim l, it is characterised in that described cable shielding layer is by compiling The metal gauze composition knitted.

3. according to the leakage protection structure of the charging pile described in claim l, it is characterised in that at described charging pile body Casing is externally provided with insulating barrier, is provided with casing screen layer in the outside of this insulating barrier, this casing screen layer and another detection of electrical leakage mould Block connects, and the outfan of this detection of electrical leakage module is connected with another input of described microprocessor.