CN204906309U - Multi -functional terminal box of intelligence photovoltaic module - Google Patents

Abstract

The utility model discloses a multi -functional terminal box of intelligence photovoltaic module, it includes basement module, diode module and apron module at least, the basement module, can freely splice and the split between diode module and the apron module three, when an organic whole is spliced into to this three, diode insulating housing is located between basement insulating housing and the apron insulating housing, and can make the basement module, each electrically conductive plug connector of diode module and apron module is with the mode in -cut connection of looks adaptation, make the basement module, the circuit structure that can provide power output protect function for photovoltaic module is constituteed with the electricity part in the apron module to the diode module, and make the basement module, the diode module is in the same place with the concatenation that apron module three stabilized. The utility model discloses a terminal box is easily keeped in repair, can reduce manpower, material resources and the time loss of maintenance, very big reduction photovoltaic power plant's operation and maintenance cost.

Description

A multifunctional junction box for smart photovoltaic modules

technical field

The utility model relates to a multifunctional junction box of an intelligent photovoltaic component, which belongs to the technical field of solar cell components.

Background technique

The solar module junction box is the direct part of the module performance output, generally composed of a box body, a box cover, a bypass diode set in the box body, a metal conductor, wires and cables, and cable connectors. Among them, the function of the bypass diode is that when the hot spot effect of the cell cannot generate electricity, it acts as a bypass, allowing the current generated by other cells to flow out of the diode, so that the solar power generation system continues to generate electricity, and will not be caused by a cell. The power generation circuit is blocked due to the problem. Except for the box cover, the traditional junction box is integrated as a whole. After connecting with the bus bar leading out of the module, it is fixed on the back of the module through silica gel, and sealed with potting glue, which becomes the output channel for the module to connect with the outside world. Such a structure ensures better waterproof performance, but once the junction box breaks down, maintenance is troublesome.

With the continuous improvement of the power of photovoltaic power generation components in recent years, and the continuous improvement of the miniaturization requirements of the junction box based on cost considerations, the power dissipated by the bypass diode in the junction box of the installation and the module is increasing under the bypass working state. The operating temperature of the diode is getting higher and higher, and the life of the diode is greatly affected by working at a high temperature for a long time. In addition, because the external cables of the junction box are often dragged and plugged, and exposed to the outdoors, the cable interface is also prone to breakage or falling off. These problems have nothing to do with the performance of the module itself, but can lead to blocked output and impaired power generation performance. When this phenomenon occurs, we usually need to replace the entire module, which has a high cost of manpower and material resources, and the process of disassembly and transportation will also cause unnecessary damage to the module itself, which will bring cost losses to the maintenance of the power station and the module supplier. .

In view of the problems existing in the prior art, it is necessary to propose a new junction box structure, which not only requires high operational safety, but also facilitates later fault maintenance.

Utility model content

The technical problem to be solved by the utility model is to provide a multifunctional junction box for an intelligent photovoltaic module.

To solve the problems of the technologies described above, the technical solution adopted in the utility model is as follows:

A multifunctional junction box for smart photovoltaic modules, which can be used to connect n strings of solar battery strings, where n≥2 and is an integer, characterized in that the multifunctional junction box for smart photovoltaic modules at least includes a base module and a diode module and cover modules;

The base module is provided with a base insulating shell and n+1 conductive posts and n+1 base conductive connectors installed in the base insulating shell, wherein the base module insulating shell is provided with a In the opening of the bus bar, the n+1 base conductive connectors are electrically connected to the n+1 conductive posts in a one-to-one correspondence and are exposed on the same end face of the base insulating housing;

The diode module is provided with a diode insulating housing, n+1 diode conductive connectors and n bypass diodes installed in the diode insulating housing, wherein the n bypass diodes are arranged in the same polarity form a diode series branch, wherein the two diode conductive connectors are electrically connected to the two ends of the diode series branch in a one-to-one correspondence and are both on the two opposite end faces of the diode insulating case. exposed, and the remaining n-1 pieces of the diode conductive connectors are electrically connected to the n-1 series contacts in the diode series branch in a one-to-one manner and are all connected to the two sides of the diode insulating case. one of the opposite end faces is exposed;

The cover module is provided with a cover insulating shell, two external cables and two cover conductive connectors installed in the cover insulating shell, wherein the two external cables are fixed on the cover insulating The outer surface of the housing is electrically connected to the two cover plate conductive connectors in a one-to-one correspondence, and the two cover plate conductive connectors are exposed on the same end surface of the cover plate insulating housing;

The base module, the diode module and the cover module can be freely spliced and disassembled. When the three are spliced into one, the diode insulating housing is located between the base insulating housing and the cover insulating housing , and make two of the n+1 base conductive connectors, the two diode conductive connectors electrically connected to both ends of the diode series branch and the two cover plate conductive connectors Can be connected in a plug-in manner, so that the remaining n-1 pieces of the n+1 base conductive connectors and the n-1 pieces of diodes electrically connected to the n-1 series contacts in the diode series branch are electrically conductive The connectors can be connected in a plug-in manner.

Wherein, the type of any one of the n+1 base conductive connectors, the n+1 diode conductive connectors and the two cover plate conductive connectors is a conductive insert or a conductive jack, The types of the conductive connectors that are connected in a plug-in manner are compatible with each other.

As one of the preferred embodiments of the present invention, the base module, the diode module and the cover module are respectively a horizontal base module, a horizontal diode module and a horizontal cover module, and the three are spliced into one body in a horizontal manner ,Right now:

The base insulating shell is a horizontal base insulating shell, two of the n+1 base conductive connectors are horizontal base conductive inserts, and the remaining n-1 pieces are horizontal base conductive jacks, The two horizontal base conductive inserts and the n-1 horizontal base conductive jacks are all exposed on the front end of the horizontal base insulating shell;

The diode insulating housing is a horizontal diode insulating housing, two of the n+1 diode conductive connectors are horizontal diode conductive jacks, and the remaining n-1 pieces are horizontal diode conductive connectors. The two horizontal diode conductive jacks are electrically connected to the two ends of the diode series branch in a one-to-one correspondence, and the two horizontal diode conductive jacks are all in the horizontal diode insulating shell The front end surface and the rear end surface of the body are exposed, and the n-1 horizontal diode conductive inserts are electrically connected to the n-1 series contacts in the diode series branch in a one-to-one manner, and the n-1 The horizontally placed diode conductive inserts are all exposed on the rear end surface of the horizontal diode insulating housing;

The cover plate insulating shell is a horizontal cover plate insulating shell, the two external cables are fixed on the front end of the horizontal cover plate insulating shell, and the two cover plate conductive connectors are horizontal Cover plate conductive jacks, the two horizontal cover plate conductive jacks are exposed on the rear end surface of the horizontal cover plate insulating housing;

When the horizontal base module, the horizontal diode module and the horizontal cover module are spliced together, the horizontal diode insulating housing is located between the horizontal base insulating housing and the horizontal cover insulating housing, and , so that the two horizontal base conductive inserts are respectively inserted through the two horizontal diode conductive sockets and then inserted into the two horizontal cover plate conductive sockets, so that the n-1 horizontal The mounted diode conductive inserts are plugged into the n-1 horizontally mounted base conductive sockets.

In order to enhance the splicing stability and splicing tightness among the base module, the diode module and the cover module in the horizontal splicing mode, as an improvement of the present invention, the front end surface of the horizontal diode insulating housing There are two horizontal concave cavities, and the rear end surface of the horizontal cover insulation shell is provided with two horizontal bosses that can respectively expose the conductive jacks of the two horizontal cover plates. When the base module, the horizontal diode module and the horizontal cover module are spliced together, the rear end surface of the horizontal diode insulating housing is in close contact with the front end surface of the horizontal base insulating housing, and the horizontal cover plate The two horizontal protrusions of the insulating housing are respectively embedded into the two horizontal concave cavities of the horizontal diode insulating housing, so that the front surface of the horizontal diode insulating housing is in contact with the horizontal cover plate The rear end surfaces of the insulating shells are closely attached to each other.

As the second preferred embodiment of the present utility model, the base module, the diode module and the cover module are respectively a vertical base module, a vertical diode module and a vertical cover module, and the three are vertically spliced into one ,Right now:

The base insulating shell is a vertical base insulating shell, two of the n+1 base conductive connectors are vertical long base conductive inserts, and the remaining n-1 pieces are vertical short bases Conductive inserts, the two vertical long base conductive inserts and n-1 vertical short base conductive inserts are exposed on the top surface of the vertical base insulating shell;

The diode insulating housing is a vertical diode insulating housing, two of the n+1 diode conductive connectors are vertically placed long diode conductive jacks, and the remaining n-1 pieces are vertically placed short diodes Conductive jacks, two vertically placed long diode conductive jacks are electrically connected to the two ends of the diode series branch in a one-to-one manner, and the two vertically placed long diode conductive jacks are in the The top and bottom surfaces of the vertical diode insulating case are exposed, and the n-1 vertical short diode conductive jacks are respectively electrically connected to the n-1 series contacts in the diode series branch in a one-to-one correspondence manner, And the n-1 vertical short diode conductive jacks are all exposed on the bottom surface of the vertical diode insulating housing;

The cover plate insulating shell is a vertical cover plate insulating shell, the two external cables are fixed on the front end of the vertical cover plate insulating shell, and the two cover plate conductive connectors are vertically placed Cover plate conductive jacks, the two vertical cover plate conductive jacks are exposed on the bottom surface of the vertical cover plate insulating housing;

When the vertical base module, the vertical diode module and the vertical cover module are spliced together, the vertical diode insulating case is located between the vertical base insulating case and the vertical cover insulating case, and , so that the two vertically-mounted long base conductive inserts are respectively inserted through the two vertically-mounted long-shaped diode conductive jacks and then inserted into the two vertically-mounted cover plate conductive jacks, so that the n - 1 piece of vertically-mounted short-type base conductive inserts inserted into the n-1 vertical-type short-type diode conductive jacks.

In order to enhance the splicing stability and splicing tightness among the base module, the diode module and the cover module in the vertical splicing mode, as an improvement of the present invention, the top surface of the vertical base insulating shell An accommodating cavity is provided, and the two vertically placed long base conductive inserts and the n-1 vertically placed short base conductive inserts are all located in the accommodating cavity; the top surface of the vertical diode insulating housing There are two vertical concave cavities, and the bottom surface of the vertical cover insulation shell is provided with two vertical bosses that can respectively expose the conductive jacks of the two vertical cover plates. When the module, the vertical diode module and the vertical cover module are spliced together, the vertical diode insulating case is embedded in the accommodating cavity of the vertical base insulating case, and the vertical cover insulating case The two vertical bosses of the body are respectively embedded into the two vertical concave cavities of the vertical diode insulating case, and the vertical cover plate insulating case is partially embedded in the vertical base insulating case In the accommodating cavity, the bottom surface of the vertical diode insulating case is in close contact with the inner side of the bottom surface of the vertical base insulating case, and the top surface of the vertical diode insulating case is in contact with the vertical cover. The bottom surface of the board insulation case is in close contact with each other.

In order to further enhance the splicing stability between the base module, the diode module and the cover module, as an improvement of the present utility model, the base insulating shell is provided with buckles, and the cover insulating shell The body is provided with a buckle bayonet, and when the base module, the diode module and the cover plate module are spliced into one body, the buckle is engaged with the buckle bayonet mouth.

In order to facilitate the introduction of the bus bar of the photovoltaic module into the base insulating housing, as a preferred embodiment of the present invention, the opening for introducing the bus bar of the photovoltaic module is arranged on the bottom surface of the base insulating housing, and the conductive column It is connected with the bus bar of the photovoltaic module introduced from the opening by means of welding or elastic clips.

In order to ensure reliable grounding of the junction box and provide effective protection against lightning strikes, as a preferred embodiment of the present invention, an insulating support is provided on the top of the base insulating A ground wire terminal strip extending in the front and rear directions, and the insulating support and the ground wire terminal strip are provided with corresponding mounting holes and grounding holes.

In order to expand the function of the junction box on the edge, as an improvement of the utility model, the multifunctional junction box of the intelligent photovoltaic module also includes an intelligent electronic module; the intelligent electronic module is provided with an intelligent electronic module insulating shell and installed on The intelligent electronic circuit unit and the two intelligent electronic module conductive connectors in the intelligent electronic module insulating housing, wherein the intelligent electronic circuit unit is electrically connected to the two intelligent electronic module conductive connectors respectively, so that The two intelligent electronic module conductive connectors are exposed on two opposite end faces of the intelligent electronic module insulating housing; the base module, the diode module, the intelligent electronic module and the cover module Can be freely spliced and disassembled. When the four are spliced into one, the diode insulating casing and the intelligent electronic module insulating casing are both located between the base insulating casing and the cover insulating casing, and the diode insulating casing and the insulating casing of the cover plate The base insulating shells are connected, the intelligent electronic module insulating shell is connected to the cover plate insulating shell, and two of the n+1 base conductive connectors and the two diode series branches are connected. The two diode conductive connectors connected electrically, the two intelligent electronic module conductive connectors and the two cover plate conductive connectors can be connected in a plug-in manner.

Compared with the prior art, the utility model has the following beneficial effects:

First, the junction box of the present invention is provided with a base module, a diode module and a cover module, which can be spliced and disassembled freely, and when the three are spliced into one body, the diode insulating housing is located on the base Between the insulating shell and the insulating shell of the cover plate, each conductive connector of the base module, the diode module and the cover plate module can be plugged and connected in a suitable manner, so that the base module, the diode module and the cover plate module The electrical components in it form a circuit structure that can provide power output protection functions for photovoltaic modules, and make the base module, diode module and cover module stably spliced together;

When the external cable and its related components fail, you only need to pull out the cover module and replace it to complete the maintenance; when the bypass diode is thermally damaged, you only need to pull out the cover module and the diode module successively, and replace them. After replacing the new diode module and then installing the cover module, the maintenance can be completed; and in the above maintenance process, the base module can always be fixed on the photovoltaic module, and the fault maintenance can be completed without replacing the entire junction box; and because Diode and external cable failures are the most important failure problems of the junction box. Therefore, the junction box of the utility model is easy to maintain, can reduce the manpower, material resources and time loss of maintenance, and greatly reduces the operation and maintenance costs of the photovoltaic power station. Wear and tear caused by components in the prior art during disassembly and transportation are avoided.

Second, the utility model provides a horizontal splicing scheme and a vertical splicing scheme for the base module, the diode module and the cover module. These two schemes can effectively strengthen the base module and the diode module under the premise of ensuring that the junction box is easy to maintain. Stitching stability and splicing tightness between the cover module and the three.

Third, the utility model can further enhance the splicing stability between the base module, the diode module and the cover module by providing a buckle on the base insulating housing and a buckle bayonet on the cover insulating housing sex.

Fourth, the utility model can fix the base module on the back plate of the photovoltaic module through silica gel by coating silica gel on the outside of the bottom surface of the base insulating shell, and because the utility model is provided with an opening on the bottom surface of the base insulating shell Therefore, the bus bar of the photovoltaic module can be easily introduced into the base insulating housing from the opening, so that the bus bar can be conveniently connected to the conductive column of the junction box by welding or elastic clips.

Fifth, the utility model can ensure the reliable grounding of the junction box and provide effective protection against lightning strikes by arranging the insulating support and the ground wire terminal strip on the base insulating shell.

Sixth, the utility model can add an intelligent electronic module, and the intelligent electronic circuit unit built in the intelligent electronic module can be any electronic circuit unit that can realize its function by electrically connecting with two external cables. Micro-inverter units for tracking the maximum output power of photovoltaic modules and converting DC to AC, or automatic electric shock protectors, network monitoring units, etc.; therefore, the junction box of the utility model has strong expandability and is easy to realize intelligence.

To sum up, the structure of the utility model is simple and clear, and the installation and disassembly are convenient. Compared with the conventional junction box design, it has greater operability, which is beneficial to the maintenance and disassembly caused by the failure of the junction box, and reduces the operation and components of the solar power station. The maintenance cost clarifies the responsibility between the component itself and the junction box of the intelligent electronic module, which is conducive to the further optimization of the end product.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:

Figure 1-1 is an exploded view of the structure of the multifunctional junction box of the smart photovoltaic module according to Embodiment 1 of the present invention;

Fig. 1-2 is a three-dimensional structural schematic diagram of the multifunctional junction box of the smart photovoltaic module according to the first embodiment of the utility model;

Fig. 1-3 is the schematic circuit diagram of the multifunctional junction box of the smart photovoltaic module according to the first embodiment of the utility model;

Fig. 2-1 is a schematic diagram of a top-view three-dimensional structure of a horizontal base module A with a top surface perspective effect in Embodiment 1 of the present utility model;

Fig. 2-2 is a schematic diagram of the three-dimensional structure of the horizontal base module A with the perspective effect of the top surface in the first embodiment of the utility model;

Figure 3-1 is a schematic diagram of the front view stereoscopic structure of the horizontal diode module B in Embodiment 1 of the present utility model;

Figure 3-2 is a schematic diagram of the rear view stereoscopic structure of the horizontal diode module B with the perspective effect of the front face in Embodiment 1 of the utility model;

Fig. 4 is a schematic diagram of the three-dimensional structure of the horizontal cover module C with a partial perspective effect on the top surface in Embodiment 1 of the present utility model;

In Figure 1-1 to Figure 4, the horizontal base module A, the horizontal diode module B, the horizontal cover module C, the horizontal base insulating case 1, the front face 1a of the horizontal base insulating case 1, and the conductive pillar 2. Horizontal base conductive insert 3, horizontal base conductive jack 4, buckle 5, ground connection strip 6, opening for introducing photovoltaic module bus bar 7, insulating support 8, horizontal diode conductive insert 9. Horizontal diode conductive jack 10, bypass diode 11, horizontal diode insulating case 12, front end face 12a, rear end face 12b of horizontal diode insulating case 12, buckle bayonet 13, external cable 14, Horizontal cover conductive jack 15, horizontal cover insulating housing 16, front end face 16a, rear end face 16b of horizontal cover insulating housing 16, horizontal concave cavity 17 of horizontal diode insulating housing 12, horizontal The horizontal boss 18 of the type cover plate insulation housing 16;

Fig. 5-1 is an exploded view of the structure of the multifunctional junction box of the smart photovoltaic module according to the second embodiment of the utility model;

Fig. 5-2 is a three-dimensional structural schematic diagram of the multifunctional junction box of the smart photovoltaic module in the second embodiment of the utility model;

Fig. 5-3 is the schematic circuit diagram of the multifunctional junction box of the smart photovoltaic module in the second embodiment of the utility model;

Fig. 6-1 is a schematic diagram of a top-view three-dimensional structure of the vertical base module VA with a top perspective effect in the second embodiment of the utility model;

Fig. 6-2 is a schematic diagram of the vertical base module VA in the second embodiment of the present invention, with a perspective effect on the top surface, when viewed from above;

Fig. 7-1 is a schematic diagram of the vertical diode module VB in the second embodiment of the utility model viewed from above;

Fig. 7-2 is a schematic diagram of the vertical structure of the vertical diode module VB with the perspective effect of the top surface in the second embodiment of the present invention;

Fig. 8 is a schematic diagram of a top-view three-dimensional structure of the vertical cover module VC with a top perspective effect in Embodiment 2 of the present utility model;

In Figure 5-1 to Figure 8, the vertical base module VA, the vertical diode module VB, the vertical cover module VC, the vertical base insulating case V1, the top surface V1a and the bottom surface V1b of the vertical base insulating case V1 , conductive column 2, vertical long base conductive insert V3, vertical short base conductive insert V4, buckle 5, ground wire connection strip 6, opening 7 for introducing photovoltaic module bus bar, insulating support 8 , vertical short diode conductive jack V9, vertical long diode conductive jack V10, bypass diode 11, vertical diode insulating case V12, top surface V12a, bottom surface V12b of vertical diode insulating case V12, card Buckle socket 13, external cable 14, vertical cover conductive jack V15, vertical cover insulating shell V16, front end face V16a of vertical cover insulating shell V16, vertical diode insulating shell V12 vertical The recessed cavity V17, the vertical boss V18 of the vertical cover plate insulating shell V16, the accommodating cavity V19 of the vertical base insulating shell V1;

Fig. 9 is an exploded view of the structure of the multifunctional junction box of the smart photovoltaic module according to the third embodiment of the utility model. In the figure, the horizontal smart electronic module D, the horizontal smart electronic module insulating shell 19, and the horizontal smart electronic module Conductive socket hole 20;

Fig. 10-1 is an exploded view of the structure of the multifunctional junction box of the smart photovoltaic module in the third embodiment of the utility model when the volume and weight of the horizontal smart electronic module D is relatively large;

Fig. 10-2 is a schematic diagram of the three-dimensional structure of the multifunctional junction box of the smart photovoltaic module in the third embodiment of the present invention when the volume and weight of the horizontal smart electronic module D is relatively large;

In Fig. 10-1 and Fig. 10-2, horizontal intelligent electronic module D, connecting plate 21;

Fig. 11 is an exploded view of the structure of the multifunctional junction box of the smart photovoltaic module according to Embodiment 4 of the present utility model, in which, the DC-DC optimizer module E.

detailed description

Embodiment one

As shown in Figure 1-1 to Figure 4, the multifunctional junction box for smart photovoltaic modules in Embodiment 1 of the present utility model can be used to connect three strings of solar cell strings, which includes a horizontal base module A, a horizontal diode module B and a horizontal type cover module C.

The above-mentioned horizontal base module A is provided with a horizontal base insulating shell 1, four conductive posts 2 installed in the horizontal base insulating shell 1, two horizontal base conductive inserts 3 and two horizontal base conductive inserts. Holes 4, wherein, the bottom surface of the horizontal base insulating shell 1 is provided with openings 7 for introducing photovoltaic module bus bars, two horizontal base conductive inserts 3 and two horizontal base conductive jacks 4 are respectively connected with four The conductive columns 2 are electrically connected in a one-to-one correspondence, and the two horizontal base conductive inserts 3 and the two horizontal base conductive jacks 4 are exposed on the front surface 1 a of the horizontal base insulating housing 1 . In addition, the top of the horizontal base insulating housing 1 is provided with an insulating support 8, and the top surface of the insulating support 8 is installed with a ground wire connection bar 6 extending in the front and rear direction. On the insulation support 8 and the ground wire connection bar 6 There are mounting holes and grounding holes corresponding to the positions.

The above-mentioned horizontal diode module B is provided with a horizontal diode insulating housing 12 and two horizontal diode conductive inserts 9 installed in the horizontal diode insulating housing 12, two horizontal diode conductive jacks 10 and four side sockets. diodes 11, wherein four bypass diodes 11 are arranged in the same direction to form a diode series branch, and two horizontal diode conductive jacks 10 correspond to the two ends of the diode series branch respectively in a one-to-one manner. Electrically connected, and the two horizontal diode conductive jacks 10 are exposed on the front end face 12a and the rear end face 12b of the horizontal diode insulating case 12, and the two horizontal diode conductive inserts 9 are connected with the diode series branch respectively. The two series contacts are electrically connected in a one-to-one manner, and the two horizontal diode conductive inserts 9 are both exposed on the rear end surface 12 b of the horizontal diode insulating case 12 . Moreover, the front end surface 12 a of the horizontal diode insulating case 12 is provided with two horizontal recesses 17 .

The horizontal cover module C is provided with a horizontal cover insulating shell 16, two external cables 14 and two horizontal cover conductive jacks 15 installed in the horizontal cover insulating shell 16, wherein, Two external cables 14 are fixed on the front end surface 16a of the horizontal cover plate insulating shell 16 and are electrically connected with the two horizontal cover plate conductive sockets 15 in a one-to-one correspondence. The two horizontal cover plate conductive sockets The holes 15 are all exposed on the rear end surface 16 b of the insulating housing 16 of the horizontal cover plate. In addition, the rear end surface 16b of the horizontal cover plate insulating housing 16 is provided with two horizontal bosses 18 that can respectively expose the two horizontal cover plate conductive insertion holes 15 .

The above-mentioned horizontal base module A, horizontal diode module B and horizontal cover module C can be freely spliced and disassembled in a horizontal manner. When the three are spliced into one, the horizontal diode insulating case 12 is located Between the horizontal base insulating case 1 and the horizontal cover plate insulating case 16, the rear end face 12b of the horizontal diode insulating case 12 is in close contact with the front end face 1a of the horizontal base insulating case 1, and the horizontal cover plate The two horizontal bosses 18 of the insulating housing 16 are respectively embedded into the two horizontal concave cavities 17 of the horizontal diode insulating housing 12, so that the front face 12a of the horizontal diode insulating housing 12 is in contact with the horizontal cover plate The rear end surface 16b of the insulating shell 16 is close to each other, and the two horizontal base conductive inserts 3 are respectively inserted through the two horizontal diode conductive sockets 10 and then inserted into the two horizontal cover plate conductive sockets 15 In this way, the two horizontal diode conductive inserts 9 are plugged into the two horizontal base conductive sockets 4 .

Moreover, the above-mentioned horizontal base insulating shell 1 is provided with buckles 5, and the horizontal cover plate insulating shell 16 is provided with buckle bayonets 13, and the horizontal base module A, the horizontal diode module B and the horizontal cover When the three board modules C are spliced into one, the buckle 5 is buckled with the buckle bayonet 13, thereby further enhancing the splicing among the horizontal base module A, the horizontal diode module B and the horizontal cover module C stability.

The method of using the multifunctional junction box of the smart photovoltaic module in the first embodiment is as follows:

installation method:

First, the horizontal base module A, the horizontal diode module B and the horizontal cover module C are spliced into one body in a horizontal manner; then, silica gel is coated on the outside of the bottom surface of the horizontal base insulating case 1, and the horizontal The base module A is fixed on the back plate of the photovoltaic module, and the bus bars of the three strings of solar cells in the photovoltaic module are introduced into the horizontal base insulating housing 1 through the opening 7 of the horizontal base insulating housing 1, and then according to Figure 1 The circuit wiring method of -3 electrically connects the bus bars of the three strings of solar battery strings to the four conductive columns 2, that is, each string of battery strings is connected in parallel with a bypass diode, and the electrical connection between the bus bars and the conductive columns 2 can be Welding or elastic clips are used to complete the electrical contact between the photovoltaic module and the junction box. At this time, the positive and negative poles of the photovoltaic module can already be output through two external cables 14, and the protection of the power output of the photovoltaic module is realized. While the horizontal base insulating housing 1 is fixed on the backplane of the photovoltaic module, the ground wire terminal strip 6 fixes the horizontal base insulating housing 1 on the frame of the photovoltaic module through the installation hole and the grounding hole, so that the junction box It can be grounded through the frame, so as to obtain effective lightning protection.

Maintenance method:

When the external cable 14 and its related components fail, you only need to flip the buckle 5 with your fingers to disengage from the buckle bayonet 13, and at the same time pull out the horizontal cover module C to replace the horizontal cover module C That's it.

When the bypass diode 11 is thermally damaged, it is also necessary to pull out the horizontal cover module C, then pull out the horizontal diode module B, replace with a new horizontal diode module B, and then install the horizontal cover module C for maintenance. and you are done.

In the above maintenance process, the horizontal base module A is always fixed on the back of the photovoltaic module, and the fault maintenance can be completed without replacing the entire wiring, which reduces the loss of manpower, material resources and time, and greatly reduces the operation and maintenance costs of the photovoltaic power station.

Embodiment two

As shown in Figure 5-1 to Figure 8, the multifunctional junction box for smart photovoltaic modules in Embodiment 2 of the present utility model can be used to connect three strings of solar battery strings, which includes a vertical base module VA, a vertical diode module VB and a vertical type cover module VC.

The above-mentioned vertical base module VA is provided with a vertical base insulating shell V1 and four conductive pillars 2 installed in the vertical base insulating shell V1, two vertical long base conductive inserts V3 and two vertical short Type base conductive insert V4, wherein, the bottom surface of the vertical base insulating shell V1 is provided with an opening 7 for introducing the bus bar of the photovoltaic module, two vertical long base conductive inserts V3 and two vertical short bases The conductive inserts V4 are respectively electrically connected to the four conductive pillars 2 in a one-to-one correspondence and are exposed on the top surface V1a of the vertical base insulating case V1. In addition, the top of the vertical base insulating shell V1 is provided with an insulating support 8, and the top surface of the insulating support 8 is installed with a ground wire connection bar 6 extending in the front and rear direction, and the insulation support 8 and the ground wire connection bar 6 are There are mounting holes and grounding holes corresponding to the positions. In addition, the top surface V1a of the vertical base insulating shell V1 is provided with an accommodating cavity V19, and two vertically placed long base conductive inserts V3 and two vertically placed short base conductive inserts V4 are located in the accommodating cavity V19. Inside.

The above-mentioned vertical diode module VB is provided with a vertical diode insulating case V12 and two vertical short diode conductive jacks V9 and two vertical long diode conductive jacks V10 installed in the vertical diode insulating shell V12 and three bypass diodes 11, wherein the three bypass diodes 11 are arranged in the same direction to form a diode series branch, and two vertical long diode conductive jacks V10 are respectively connected to the two ends of the diode series branch. It is electrically connected in a one-to-one correspondence, and the two vertical long diode conductive jacks V10 are exposed on the top surface V12a and the bottom surface V12b of the vertical diode insulating case V12, and the two vertical short diode conductive jacks V9 is electrically connected to two series contacts in the diode series branch in a one-to-one manner, and the two vertical short diode conductive jacks V9 are exposed on the bottom surface V12b of the vertical diode insulating case V12. Moreover, the top surface V12a of the vertical diode insulating case V12 is provided with two vertical concave cavities V17.

The above-mentioned vertical cover module VC is provided with a vertical cover insulating shell V16, two external cables 14 and two vertical cover conductive jacks V15 installed in the vertical cover insulating shell V16, wherein, Two external cables 14 are fixed on the front end surface V16a of the vertical cover insulation shell V16 and are electrically connected with the two vertical cover conductive jacks V15 in a one-to-one correspondence. The two vertical cover conductive jacks V15 are all exposed on the bottom surface of the vertical cover plate insulating case V16. In addition, two vertical bosses V18 are provided on the bottom surface of the vertical cover insulation case V16 to respectively expose the two vertical cover conductive insertion holes V15.

The above-mentioned vertical base module VA, vertical diode module VB and vertical cover module VC can be spliced and split freely in a vertical manner. When the three are spliced into one, the vertical diode insulating case V12 is located at Between the vertical base insulating case V1 and the vertical cover plate insulating case V16, the vertical diode insulating case V12 is embedded in the accommodating cavity V19 of the vertical base insulating case V1, and the vertical cover plate insulating case The two vertical bosses V18 of V16 are respectively embedded into the two vertical concave cavities V17 of the vertical diode insulating case V12, and the vertical cover plate insulating case V16 is partially embedded in the vertical base insulating case V1. In the accommodation cavity V19, the bottom surface V12b of the vertical diode insulating case V12 is in close contact with the inner side of the bottom surface V1b of the vertical base insulating case V1, and the top surface V12a of the vertical diode insulating case V12 is insulated from the vertical cover plate The bottom surface of the housing V16 is close to each other, and the two vertical long base conductive inserts V3 are respectively inserted through the two vertical long diode conductive jacks V10 and then inserted into the two vertical cover plate conductive jacks In V15, two vertical short base conductive inserts V4 are plugged into two vertical short diode conductive jacks V9.

In addition, the above-mentioned vertical base insulating shell V1 is provided with a buckle 5, and the vertical cover plate insulating shell V16 is provided with a buckle bayonet 13, and the vertical base module VA, the vertical diode module VB and the vertical cover When the board module VC is spliced into one, the buckle 5 and the buckle bayonet 13 are buckled together, thereby further enhancing the splicing among the vertical base module VA, the vertical diode module VB and the vertical cover module VC stability.

The method of using the multifunctional junction box of the smart photovoltaic module in the second embodiment is as follows:

installation method:

Firstly, the vertical base module VA, the vertical diode module VB and the vertical cover module VC are spliced vertically into one; then, apply silica gel on the outside of the bottom surface of the vertical base insulating case V1, and through the silica gel the vertical The base module VA is fixed on the back plate of the photovoltaic module, and the bus bars of the three solar cell strings in the photovoltaic module are introduced into the vertical base insulating housing V1 through the opening 7 of the vertical base insulating housing V1, and then according to Figure 5 The circuit wiring method of -3 connects the bus bars of the three strings of solar cells with the four conductive columns 2, and the electrical connection between the bus bars and the conductive columns 2 can be done by welding or elastic clips, so as to complete the photovoltaic module and the junction box At this time, the positive and negative poles of the photovoltaic module can be output through two external cables 14, and the protection of the power output of the photovoltaic module is realized. While the vertical base insulating case V1 is fixed on the backplane of the photovoltaic module, the ground wire terminal strip 6 fixes the vertical base insulating case V1 on the frame of the photovoltaic module through the installation hole and the grounding hole, so that the junction box It can be grounded through the frame, so as to obtain effective lightning protection.

Maintenance method:

When the external cable 14 and its related components fail, you only need to flip the buckle 5 with your fingers to make it disengage from the buckle bayonet 13, and pull out the vertical cover module VC at the same time to replace the vertical cover module VC That's it.

When the bypass diode 11 is thermally damaged, it is also necessary to pull out the vertical cover module VC, then pull out the vertical diode module VB, replace with a new vertical diode module VB, and then install the vertical cover module VC for maintenance. and you are done.

In the above maintenance process, the vertical base module VA is always fixed on the back of the photovoltaic module, and the fault maintenance can be completed without replacing the entire wiring, which reduces the loss of manpower, material resources and time, and greatly reduces the operation and maintenance costs of the photovoltaic power station.

Embodiment three

As shown in Figure 9, the multifunctional junction box of the smart photovoltaic module in the third embodiment of the present utility model is basically the same as the first embodiment, and their difference is that the multifunctional junction box of the smart photovoltaic module in the third embodiment also includes a horizontal intelligent type Electronic module D, the horizontal intelligent electronic module D is provided with a horizontal intelligent electronic module insulating housing 19 and an intelligent electronic circuit unit installed in the horizontal intelligent electronic module insulating housing 19 and two horizontal intelligent electronic modules. Type electronic module conductive insertion hole 20, wherein, the intelligent electronic circuit unit is electrically connected with two horizontal intelligent electronic module conductive insertion holes 20 respectively, and the two horizontal intelligent electronic module conductive insertion holes 20 are all in the horizontal The front and rear end surfaces of the type intelligent electronic module insulating housing 19 are exposed. Among them, the intelligent electronic circuit unit of the horizontal intelligent electronic module D can be any electronic circuit unit that can realize its function by electrically connecting with two external cables 14, for example, it is used to realize the tracking of the maximum output power of the photovoltaic module and the DC to the microinverter unit for AC conversion.

In the third embodiment, the horizontal base module A, the horizontal diode module B, the horizontal intelligent electronic module D and the horizontal cover module C can be spliced and disassembled freely, and the four are spliced into one , the horizontal diode insulating case 12 and the horizontal intelligent electronic module insulating case 19 are located between the horizontal base insulating case 1 and the horizontal cover plate insulating case 16, and the horizontal diode insulating case 12 and the horizontal Type base insulating shell 1 is connected, and horizontal intelligent electronic module insulating shell 19 is connected with horizontal cover plate insulating shell 16, and two pieces of horizontal base conductive inserts 3 are sequentially inserted through the two horizontal The vertical diode conductive socket 10 and the two horizontal intelligent electronic module conductive socket holes 20 are inserted into the two horizontal cover plate conductive sockets 15, so that the two horizontal diode conductive inserts 9 are plugged into the two In a horizontal base conductive jack 4.

In addition, as shown in Figure 10-1 and Figure 10-2, when the volume and weight of the above-mentioned horizontal intelligent electronic module D are relatively large, the horizontal intelligent electronic module D and the horizontal intelligent electronic module D are connected by adding connecting plates 21 and screws. The base module A is connected and fixed to ensure the overall mechanical strength of the junction box.

The use method and easy-to-maintain effect of the third embodiment of the junction box are basically the same as those of the first embodiment, and will not be repeated here.

Embodiment Four

As shown in Figure 11, the multifunctional junction box of the smart photovoltaic module in the fourth embodiment of the utility model adopts the DC-DC optimizer module E to replace the horizontal diode module B in the first embodiment, and the DC-DC optimizer module E is connected with the horizontal The connection mode of the vertical base module A and the horizontal cover module C is the same as that of the horizontal diode module B, so that the maximum output power tracking of the photovoltaic module can be realized by using the DC-DC optimizer module E.

The utility model is not limited to the above-mentioned specific embodiments. According to the above content, according to the common technical knowledge and conventional means in this field, without departing from the above-mentioned basic technical ideas of the utility model, the utility model can also be made into other various forms. The equivalent modifications, replacements or alterations all fall within the protection scope of the present utility model.

Other forms of the utility model are illustrated below by way of example:

First, the junction box of the present utility model can also be used to connect two or more than three strings of solar battery strings by correspondingly adjusting the number of conductive posts, base conductive connectors, diode conductive connectors and bypass diodes, wherein , the number adjustment rules of the whole conductive column, the base conductive connector, the diode conductive connector and the bypass diode and the connection rules between them have been summarized in the content of the utility model, and will not be repeated here.

Second, the connector type of any one of the conductive connectors involved in the junction box of the present utility model can be a conductive insert or a conductive jack, and it is only necessary to ensure that the conductive connectors connected by each piece are plugged. The types of connectors are compatible with each other, so that the various modules contained in the junction box can be spliced and combined into one body.

Thirdly, no matter what splicing method such as horizontal or vertical is used for the base module, diode module and cover module of the junction box of the present invention, the function of the junction box can be expanded by setting an intelligent electronic module.

Claims (10)

1. an intelligent photovoltaic component Multifunctional junction box, can be used in connecting n and goes here and there solar cell string, and wherein, n >=2 and be integer, is characterized in that: described intelligent photovoltaic component Multifunctional junction box at least comprises base module, diode (led) module and cover plate module;

Described base module is provided with substrate insulation shell and the n+1 root conductive pole (2) be arranged in substrate insulation shell and n+1 part base conductive plug connector, wherein, described base module insulation shell is provided with the opening (7) for introducing photovoltaic module busbar, and described n+1 part base conductive plug connector is electrically connected with described n+1 root conductive pole (2) in mode one to one and all exposes at the same end face of described substrate insulation shell respectively;

Described diode (led) module is provided with diode isolation housing and the n+1 part diode conduction plug connector be arranged in diode isolation housing and n bypass diode (11), wherein, a described n bypass diode (11) forms Diode series branch road in the mode that polarity is arranged in the same way, wherein diode conduction plug connector described in two pieces is electrically connected with the two ends of described Diode series branch road in mode one to one and all exposes at two opposing end surfaces of described diode isolation housing respectively, the contact of connecting with the n-1 in described Diode series branch road respectively of diode conduction plug connector described in all the other n-1 parts is electrically connected in mode one to one and one of them all in two opposing end surfaces of described diode isolation housing is exposed,

The two pieces cover plate conductive plug-in connecting component that described cover plate module is provided with cover plate insulation shell, two external cables (14) and is arranged in cover plate insulation shell, wherein, described two external cables (14) to be fixed on cover plate insulation shell outer surface and to be electrically connected in mode one to one with described two pieces cover plate conductive plug-in connecting component, and described two pieces cover plate conductive plug-in connecting component all exposes at the same end face of described cover plate insulation shell;

Described base module, can free splicing and fractionation between diode (led) module and cover plate module three, when this three is spliced into one, described diode isolation housing is between substrate insulation shell and cover plate insulation shell, and, make the two pieces in described n+1 part base conductive plug connector, the described two pieces diode conduction plug connector that is electrically connected with Diode series branch road two ends and described two pieces cover plate conductive plug-in connecting component can be connected in the mode of grafting, the n-1 part diode conduction plug connector that all the other n-1 parts in described n+1 part base conductive plug connector and described contact of connecting with n-1 in Diode series branch road are electrically connected can be connected in the mode of grafting.

2. intelligent photovoltaic component Multifunctional junction box according to claim 1, it is characterized in that: in described n+1 part base conductive plug connector, n+1 part diode conduction plug connector and two pieces cover plate conductive plug-in connecting component, the plug connector type of any is conductive insert or conductive jack, and described each the conductive plug-in connecting component connected in the mode of grafting plug connector type is each other suitable.

3. intelligent photovoltaic component Multifunctional junction box according to claim 1, it is characterized in that: described base module, diode (led) module and cover plate module are respectively horizontal base module (A), horizontal diode (led) module (B) and horizontal cover plate module (C), this three is spliced into one in a horizontal manner, that is:

Described substrate insulation shell is horizontal substrate insulation shell (1), two pieces in described n+1 part base conductive plug connector is pressure-bearing type base conductive inserted sheet (3), all the other n-1 parts are pressure-bearing type base conductive jack (4), and this two panels pressure-bearing type base conductive inserted sheet (3) and n-1 pressure-bearing type base conductive jack (4) are all exposed at the front end face (1a) of described horizontal substrate insulation shell (1);

Described diode isolation housing is horizontal diode isolation housing (12), two pieces in described n+1 part diode conduction plug connector is pressure-bearing type diode conduction jack (10), all the other n-1 parts are pressure-bearing type diode conduction inserted sheet (9), these two pressure-bearing type diode conduction jacks (10) are electrically connected in mode one to one with the two ends of described Diode series branch road respectively, and these two pressure-bearing type diode conduction jacks (10) are all exposed at the front end face (12a) of described horizontal diode isolation housing (12) and rear end face (12b), this n-1 sheet pressure-bearing type diode conduction inserted sheet (9) contact of connecting with the n-1 in described Diode series branch road is respectively electrically connected in mode one to one, and this n-1 sheet pressure-bearing type diode conduction inserted sheet (9) all exposes at the rear end face (12b) of described horizontal diode isolation housing (12),

Described cover plate insulation shell is horizontal cover plate insulation shell (16), described two external cables (14) are fixed on the front end face (16a) of horizontal cover plate insulation shell (16), described two pieces cover plate conductive plug-in connecting component is pressure-bearing type cover plate conductive jack (15), and these two pressure-bearing type cover plate conductive jacks (15) are all exposed at the rear end face (16b) of described horizontal cover plate insulation shell (16);

Described horizontal base module (A), when horizontal diode (led) module (B) and horizontal cover plate module (C) are spliced into one, described horizontal diode isolation housing (12) is positioned between horizontal substrate insulation shell (1) and horizontal cover plate insulation shell (16), and, be plugged into after making described two panels pressure-bearing type base conductive inserted sheet (3) be inserted through described two pressure-bearing type diode conduction jacks (10) respectively in described two pressure-bearing type cover plate conductive jacks (15), described n-1 sheet pressure-bearing type diode conduction inserted sheet (9) is plugged in described n-1 pressure-bearing type base conductive jack (4).

4. intelligent photovoltaic component Multifunctional junction box according to claim 3, it is characterized in that: the front end face (12a) of described horizontal diode isolation housing (12) is provided with two pressure-bearing type cavitys (17), the rear end face (16b) of described horizontal cover plate insulation shell (16) is provided with the pressure-bearing type boss (18) that two can be exposed described two pressure-bearing type cover plate conductive jacks (15) respectively, described horizontal base module (A), when horizontal diode (led) module (B) and horizontal cover plate module (C) are spliced into one, the rear end face (12b) of described horizontal diode isolation housing (12) is close to mutually with the front end face (1a) of described horizontal substrate insulation shell (1), two pressure-bearing type boss (18) of described horizontal cover plate insulation shell (16) respectively setting-in enter in two pressure-bearing type cavitys (17) of described horizontal diode isolation housing (12), the front end face (12a) of described horizontal diode isolation housing (12) is close to mutually with the rear end face (16b) of described horizontal cover plate insulation shell (16).

5. intelligent photovoltaic component Multifunctional junction box according to claim 1, it is characterized in that: described base module, diode (led) module and cover plate module are respectively rectilinear base module (VA), rectilinear diode (led) module (VB) and rectilinear cover plate module (VC), this three is spliced into one in a vertical manner, that is:

Described substrate insulation shell is rectilinear substrate insulation shell (V1), two pieces in described n+1 part base conductive plug connector is longitudinal elongated base conductive inserted sheet (V3), all the other n-1 parts are longitudinal short base conductive inserted sheet (V4), and this two panels longitudinal elongated base conductive inserted sheet (V3) and n-1 sheet longitudinal short base conductive inserted sheet (V4) all expose at the end face (V1a) of described rectilinear substrate insulation shell (V1);

Described diode isolation housing is rectilinear diode isolation housing (V12), two pieces in described n+1 part diode conduction plug connector is longitudinal elongated diode conduction jack (V10), all the other n-1 parts are longitudinal short diode conduction jack (V9), two longitudinal elongated diode conductions jack (V10) are electrically connected in mode one to one with the two ends of described Diode series branch road respectively, and these two longitudinal elongated diode conductions jack (V10) are all exposed at the end face (V12a) of described rectilinear diode isolation housing (V12) and bottom surface (V12b), n-1 longitudinal short diode conduction jack (V9) contact of connecting with the n-1 in described Diode series branch road is respectively electrically connected in mode one to one, and this n-1 longitudinal short diode conduction jack (V9) is all exposed in the bottom surface (V12b) of described rectilinear diode isolation housing (V12),

Described cover plate insulation shell is rectilinear cover plate insulation shell (V16), described two external cables (14) are fixed on the front end face (V16a) of rectilinear cover plate insulation shell (V16), described two pieces cover plate conductive plug-in connecting component is longitudinal cover plate conductive jack (V15), and these two longitudinal cover plate conductive jacks (V15) are all exposed in the bottom surface of described rectilinear cover plate insulation shell (V16);

Described rectilinear base module (VA), when rectilinear diode (led) module (VB) and rectilinear cover plate module (VC) are spliced into one, described rectilinear diode isolation housing (V12) is positioned between rectilinear substrate insulation shell (V1) and rectilinear cover plate insulation shell (V16), and, be plugged into after making described two panels longitudinal elongated base conductive inserted sheet (V3) be inserted through described two longitudinal elongated diode conductions jack (V10) respectively in described two longitudinal cover plate conductive jacks (V15), described n-1 sheet longitudinal short base conductive inserted sheet (V4) is plugged in described n-1 longitudinal short diode conduction jack (V9).

6. intelligent photovoltaic component Multifunctional junction box according to claim 5, it is characterized in that: the end face (V1a) of described rectilinear substrate insulation shell (V1) is provided with containing cavity (V19), and described two panels longitudinal elongated base conductive inserted sheet (V3) and n-1 sheet longitudinal short base conductive inserted sheet (V4) are all positioned at this containing cavity (V19); the end face (V12a) of described rectilinear diode isolation housing (V12) is provided with two longitudinal cavitys (V17), the bottom surface of described rectilinear cover plate insulation shell (V16) is provided with the longitudinal boss (V18) that two can be exposed described two longitudinal cover plate conductive jacks (V15) respectively, described rectilinear base module (VA), when rectilinear diode (led) module (VB) and rectilinear cover plate module (VC) are spliced into one, described rectilinear diode isolation housing (V12) is inlaid in the containing cavity (V19) of described rectilinear substrate insulation shell (V1), two longitudinal boss (V18) of described rectilinear cover plate insulation shell (V16) respectively setting-in enter in two longitudinal cavitys (V17) of described rectilinear diode isolation housing (V12), described rectilinear cover plate insulation shell (V16) part is inlaid in the containing cavity (V19) of described rectilinear substrate insulation shell (V1), the bottom surface (V12b) of described rectilinear diode isolation housing (V12) is close to mutually with the inner side, bottom surface (V1b) of described rectilinear substrate insulation shell (V1), the end face (V12a) of described rectilinear diode isolation housing (V12) is close to mutually with the bottom surface of described rectilinear cover plate insulation shell (V16).

7. the intelligent photovoltaic component Multifunctional junction box according to claim 1 to 6 any one, it is characterized in that: described substrate insulation shell is provided with buckle (5), described cover plate insulation shell is provided with buckle bayonet socket (13), when described base module, diode (led) module and cover plate module three are spliced into one, described buckle (5) and buckle bayonet socket (13) are interlocked.

8. the intelligent photovoltaic component Multifunctional junction box according to claim 1 to 6 any one, it is characterized in that: the described opening (7) for introducing photovoltaic module busbar is arranged on the bottom surface of described substrate insulation shell, described conductive pole (2) and the photovoltaic module busbar introduced from described opening (7) are to weld or the mode of elastic clip is connected.

9. the intelligent photovoltaic component Multifunctional junction box according to claim 1 to 6 any one, it is characterized in that: the top of described substrate insulation shell is provided with insulated leg (8), the end face of this insulated leg (8) is provided with the ground wire terminal strip (6) extended along the longitudinal direction, further, described insulated leg (8) is provided with the corresponding installing hole in position and ground hole with ground wire terminal strip (6).

10. the intelligent photovoltaic component Multifunctional junction box according to claim 1 to 6 any one, is characterized in that: described intelligent photovoltaic component Multifunctional junction box also comprises intelligent electric submodule, intelligent electric submodule is provided with intelligent electronic insulation module housing and the intelligent electronic circuit unit be arranged in intelligent electronic insulation module housing and two pieces intelligent electric submodule conductive plug-in connecting component, wherein, described intelligent electronic circuit unit is electrically connected with two pieces intelligent electric submodule conductive plug-in connecting component respectively, and described two pieces intelligent electric submodule conductive plug-in connecting component all exposes at two of described intelligent electronic insulation module housing relative end faces, described base module, diode (led) module, can free splicing and fractionation between intelligent electric submodule and cover plate module, when this is spliced into one, described diode isolation housing and intelligent electronic insulation module housing are all between substrate insulation shell and cover plate insulation shell, diode isolation housing connects with substrate insulation shell, intelligent electronic insulation module housing connects with cover plate insulation shell, and, make the two pieces in described n+1 part base conductive plug connector, the described two pieces diode conduction plug connector be electrically connected with Diode series branch road two ends, described two pieces intelligent electric submodule conductive plug-in connecting component can be connected in the mode of grafting with described two pieces cover plate conductive plug-in connecting component.