CN202633345U

CN202633345U - Junction box with blocking device

Info

Publication number: CN202633345U
Application number: CN201220183187XU
Authority: CN
Inventors: 张发宇
Original assignee: SUZHOU CHANGFENG AUTOMATION TECHNOLOGY Co Ltd
Current assignee: SUZHOU CHANGFENG AUTOMATION TECHNOLOGY Co Ltd
Priority date: 2012-04-27
Filing date: 2012-04-27
Publication date: 2012-12-26
Anticipated expiration: 2022-04-27

Abstract

The utility model discloses a junction box with a blocking device. The junction box comprises a box body and a convergence circuit that is arranged inside the box body. The convergence circuit includes an anode circuit and a cathode circuit. The anode circuit and the cathode circuit respectively include multipath anode input terminals and cathode input terminals of a photovoltaic array, wherein the multipath anode input terminals and cathode input terminals are connected in parallel to a bus rod. And each path of the anode input terminal is connected in series with a blocking diode; or each path of the cathode input terminal is connected in series with a blocking diode; or each path of anode input terminal and each path of the cathode input terminal are connected in series with blocking diodes. according to the above-mentioned mode, with utilization of the provided junction box with the blocking device, backward voltages that are generated due to various causes can be effectively prevented from flowing through a loop of a battery panel, so that damages of components in the junction box and the battery panel due to the backward voltage flowing can be avoided.

Description

A kind of header box with anti-deinstall

Technical field

The utility model relates to the solar energy generation technology field, particularly a kind of header box with anti-deinstall.

Background technology

21 century, energy problem and environment have promoted the rapid rise of solar energy power generating industry jointly, and develop into as an independent power station from the civil equipment of disperseing on a small scale with as the form of supplementary energy gradually and generate electricity by way of merging two or more grid systems, for electrical network provides electric energy.In the construction of solar power plant, header box becomes the very important equipment of whole generating process, and the security reliability of its operation is also concerning the safe operation and the generating efficiency of whole solar power plant.

The electrical principle of tradition header box is that the electric current by a plurality of photovoltaic arrays is input in the header box, through circuit breaker output, adds components and parts such as fuse, lightning protection device in the circuit simultaneously after confluxing.This simple and reliable for structure, but have following potential safety hazard simultaneously:

1. in the different circuit that same header box connected; If have a loop break down or the loop in cell panel hidden by other objects unexpectedly; The output voltage in this loop will be lower than all the other normal loops, and the cell panel in this loop will become load at this moment, and the voltage in all the other normal loops will flow directly into this fault loop; Promptly cause the waste of the energy, possibly cause the damage of interior components and parts of header box and cell panel simultaneously.

2. perhaps run into the bad weather of meteorological condition night,, make line voltage blow back into header box, also will make the cell panel in each loop become load, cause damage through inverter if inverter breaks down.

The utility model content

The technical problem that the utility model mainly solves provides a kind of header box with anti-deinstall, can effectively prevent by the reverse voltage that a variety of causes the produces cell panel loop of flowing through, avoid so the header box that causes in the damage of components and parts and cell panel.

For solving the problems of the technologies described above; The technical scheme that the utility model adopts is: a kind of header box with anti-deinstall is provided; It is characterized in that; Comprise casing and be arranged on the circuit that confluxes in the casing, the described circuit that confluxes comprises anodal loop and negative loop, and described anodal loop and negative loop comprise the multichannel electrode input end and the negative input of photovoltaic array respectively; Described multichannel electrode input end and negative input are parallel-connected on the bus rod; Described every road electrode input end series connection counnter attack diode, perhaps every road negative input series connection counnter attack diode, perhaps every road electrode input end and the every road negative input counnter attack diode of all connecting.

In preferred embodiment of the utility model, also comprise fuse, circuit breaker and lightning protection device in the described circuit that confluxes.

In preferred embodiment of the utility model, described counnter attack diode uses with the fuse combined serial in the circuit that confluxes, and perhaps uses separately.

In preferred embodiment of the utility model, when described counnter attack diode used with the fuse combined serial in the circuit that confluxes, the counnter attack diode was connected on fuse front or fuse back.

The beneficial effect of the utility model is: the header box of the anti-deinstall of the band of the utility model; Through the counnter attack diode of connecting; When reverse voltage occurring; The counnter attack diode plays the effect of blocking reverse voltage, prevents that reverse voltage from flowing into header box, realizes preventing the damage that the reverse voltage that produces because of a variety of causes causes casing and photovoltaic battery panel.

Description of drawings

Fig. 1 is the fundamental diagram of circuit one preferred embodiment of confluxing in the utility model header box;

Fig. 2 is the fundamental diagram of another preferred embodiment of circuit of confluxing in the utility model header box;

Fig. 3 is the fundamental diagram of another preferred embodiment of circuit of confluxing in the utility model header box.

Embodiment

Below in conjunction with accompanying drawing the preferred embodiment of the utility model is set forth in detail, thereby the protection range of the utility model is made more explicit defining so that advantage of the utility model and characteristic can be easier to it will be appreciated by those skilled in the art that.

The utility model provides a kind of header box with anti-deinstall, comprises casing and is arranged on the circuit that confluxes in the casing.Please refer to Fig. 1,2 and 3; The circuit that confluxes comprises anodal loop and negative loop; This positive pole loop and negative loop comprise the multichannel electrode input end and the negative input of photovoltaic array respectively, and multichannel electrode input end and negative input are parallel-connected on the bus rod, every road electrode input end series connection counnter attack diode; Perhaps every road negative input series connection counnter attack diode, perhaps every road electrode input end and the every road negative input counnter attack diode of all connecting.

Fuse in the counnter attack diode and the circuit that confluxes can combined serial use, and also can use separately.When the counnter attack diode used with the fuse combined serial in the circuit that confluxes, the counnter attack diode was connected on fuse front or fuse back; When not being in series with fuse in electrode input end and the negative input, the counnter attack diode directly is serially connected in the negative input, uses separately.Be that counnter attack diode mounting means has three kinds: 1. be installed in electrode input end, or negative input, or before the fuse of electrode input end and negative input; 2. be installed in electrode input end, or negative input, or after the fuse of electrode input end and negative input; 3. electrode input end, or negative input, or electrode input end and negative input do not use fuse, the counnter attack diode of directly connecting.

Also comprise fuse, circuit breaker and lightning protection device in the circuit that confluxes in the utility model, the electric current of a plurality of photovoltaic arrays is input in the header box, through circuit breaker output, adds components and parts such as fuse, lightning protection device in the circuit simultaneously after confluxing.

The header box of the anti-deinstall of the band that the utility model provides has following benefit:

1. simple and easy to do, with low cost;

2. effectively with the loop insulation blocking that suffers reverse voltage in the header box, avoided reverse voltage in the loop, to evoke reverse current and equipment has been caused damage, and the direct and potential economic loss that causes thus.

3. lower cost has guaranteed the stable operation of equipment long-term safety, improves the on-road efficiency in power plant.

The header box of the anti-deinstall of the band that the utility model discloses; Through the counnter attack diode of connecting; When reverse voltage occurring; The counnter attack diode plays the effect of blocking reverse voltage, prevents that reverse voltage from flowing into header box, realizes preventing the damage that the reverse voltage that produces because of a variety of causes causes casing and photovoltaic battery panel.

The above is merely the embodiment of the utility model; Be not thus the restriction the utility model claim; Every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the utility model.

Claims

1. be with the header box of preventing deinstall for one kind; It is characterized in that; Comprise casing and be arranged on the circuit that confluxes in the casing, the described circuit that confluxes comprises anodal loop and negative loop, and described anodal loop and negative loop comprise the multichannel electrode input end and the negative input of photovoltaic array respectively; Described multichannel electrode input end and negative input are parallel-connected on the bus rod; Described every road electrode input end series connection counnter attack diode, perhaps every road negative input series connection counnter attack diode, perhaps every road electrode input end and the every road negative input counnter attack diode of all connecting.

2. the header box of the anti-deinstall of band according to claim 1 is characterized in that, also comprises fuse, circuit breaker and lightning protection device in the described circuit that confluxes.

3. the header box of the anti-deinstall of band according to claim 1 is characterized in that, described counnter attack diode uses with the fuse combined serial in the circuit that confluxes, and perhaps uses separately.

4. the header box of the anti-deinstall of band according to claim 3 is characterized in that, when described counnter attack diode used with the fuse combined serial in the circuit that confluxes, the counnter attack diode was connected on fuse front or fuse back.