DE102017120795A1 - Solar module and solar module system - Google Patents

Abstract

The invention relates to a solar module having a plate-shaped module body (1) with two module longitudinal edges (11) and with two transverse module edges (12), the module body (1) further comprising a module front side and a module rear side (13), a mounted on the module back (13) plus pole junction box (2) with a positive pole can body (21) having a positive pole connecting piece (211) for electrical connection of the positive terminal box (2) and a distance from the positive pole -Connection box (2) on the back of the module (13) mounted negative terminal box (3) with a negative terminal box body (31) having a negative terminal (311) for electrical connection of the negative terminal box (3). According to the invention it is provided that the positive pole junction box (2) and the negative terminal box (3) are mounted on the module back (13) that with respect to an imaginary connecting line (V) between the positive terminal box (2) and the Negative terminal box (3), which divides the module back (13) in a first section (A1) and in a second section (A2), the positive pole connecting piece (211) in the direction of the first section (A1) and the negative pole Connecting piece (311) in the direction of the second portion (A2) or the positive pole connecting piece (211) and the negative pole connecting piece (311) along the imaginary connecting line (V) facing in opposite directions. Furthermore, the invention relates to a solar module system with several identically designed such solar modules.

Description

The invention relates to a solar module and a solar module system comprising a plurality of such solar modules. In particular, the invention relates to a solar module with a plate-shaped module body with a module front side, a module back, two module longitudinal edges and two transverse module edges. The module body has a positive pole terminal box mounted on the back of the module and a negative terminal box mounted spaced from the positive terminal box on the back of the module. Furthermore, the invention relates to a solar module system with several such, the same design solar modules.

Such a solar module system is in 1 shown in partial top view. The solar module system has a plurality of identically formed solar modules, three of which are shown purely by way of example. Each solar module has a plate-shaped module body 1 with two module longitudinal edges 11 and with two module transverse edges 12 and further a module back 13 and a module front (not shown). The module fronts of the solar modules are in 1 not apparent, because 1 a plan view of the module backs 13 the solar modules shows. The solar modules are with their module transverse edges 12 adjacent and arranged parallel to each other. Each module body 1 has one on the back of the module 13 mounted positive pole junction box 2 with a positive pole body 21 , which has a positive pole connector 211 for electrical connection of the solar module via the positive pole junction box 2 on. Furthermore, one is spaced from the positive pole junction box 2 on the back of the module 13 mounted negative terminal box 3 with a negative pole can body 31 provided, a negative pole connector 311 for electrical connection of the solar module via the negative pole junction box 3 having. The positive pole junction box 2 and the negative terminal box 3 are spaced from each other in edge regions opposite module longitudinal edges 11 assembled.

Both the positive pole junction box 2 as well as the negative terminal box 3 Therefore, each have a can body 21 respectively. 31 and a connecting piece 211 respectively. 311 on. The positive pole connection piece 211 extends from the positive pole can body 21 in an extending direction (not shown) so as to have a projection of the positive terminal can body 21 forms, which extends in the extension direction. For the negative pole connection piece 311 of the negative pole can body 31 applies accordingly. The positive pole junction box 2 and the negative terminal box 3 are so on the back of the module 13 mounted, that with respect to an imaginary connecting line V between the positive pole junction box 2 and the negative terminal box 3 that the module back 13 in a first section A1 and in a second section A2 splits, the positive pole connector 211 and the negative pole connector 311 each module body 1 in the same direction - purely exemplary in the direction of the second section A2 - point. The positive pole connection piece 211 and the negative pole connector 311 are aligned so that the positive pole connector 211 from the positive pole can body 21 extends in the extension direction so that it is to the module transverse edge 12 points, to which also the negative pole connecting piece 311 points away from the negative pole can body 31 extends in its extension direction. The positive pole connection piece 211 and the negative pole connector 311 therefore have the same module transverse edge 12 and therefore in the same direction.

Each module body 1 also has a central box 4 on that between the positive pole junction box 2 and the negative pole junction box 3 on the back of the module 13 centrally or substantially centrally mounted on the imaginary connecting line V, which is between the positive pole junction box 2 and the negative terminal box 3 thought runs.

The solar modules are equipped with electrical module connection cables 6 interconnected electrically in series, each with a negative terminal 311 a first solar module with a positive pole connection piece 211 connect a second solar module arranged adjacent to each other. The electrical module connection cables 6 run between the solar modules to form cable loops. A cable loop in the context of the invention is present when the extension direction of the module connection cable 6 on the way from the positive pole junction box 211 of a solar module to the negative terminal box 311 of the adjacent further solar module changes by more than 90 degrees. Such cable loops inevitably occur due to the orientation of the connecting piece.

When installing such a solar module system, for example, on the roof of a house, it is expensive for installers, the electrical module connection cable 6 to the positive pole junction boxes 2 and negative pole junction boxes 3 to assemble. Because the positive pole connectors 211 and the negative pole connectors 311 pointing in the same direction, it is very difficult for the installers the respective connecting pieces with the associated module connection cable 6 to reach. The positive pole junction boxes 2 and negative pole junction boxes 3 can only by means of the module connection cable 6 be connected when more than one installer carries out the work. An installer must lift a solar module so that the other installer on the back of the module body has the necessary electrical connections with the respective ones Module connection cables 6 can produce with the respective junction boxes. The corresponding need for coordinated manual work causes high personnel costs. In addition, the required lengths of the cable loops cause module connection cables 6 Costs.

It is therefore an object of the invention to provide a solar module and a solar module system, which bring cost savings.

According to the invention the object is achieved by a solar module having the features of patent claim 1 and a solar module system having the features of patent claim 9. Advantageous developments are set forth in the subclaims.

According to the invention, it is provided that the positive pole junction box and the negative pole junction box are mounted on the back of the module such that with respect to an imaginary connecting line between the positive pole junction box and the negative pole junction box, the module back in a first section and in divides a second portion, the plus-pole connecting piece in the direction of the first portion and the negative pole connecting piece in the direction of the second portion or have the positive pole and the negative terminal spigot along the imaginary connecting straight line in opposite directions.

The inventive arrangement and / or orientation of the positive pole and negative pole connection piece in the solar module and the solar module system, a leadership of the plus pole junction box and negative pole junction box of two solar modules electrically connecting module connection cable is optimized. This design makes the electrical module connection cables easier to reach when mounting the module connection cable to the positive and negative terminal boxes. This is due to the fact that a module connection cable, which is connected to a positive terminal of a positive pole terminal box of a first solar module, out of this automatically out in the direction of a to be connected via the electrical module connection cable minus pole connection piece of a negative terminal box of another second solar module becomes. As a result, significantly shorter module connection cables without cable loops can be realized, thereby saving costs in addition to the simpler installation on the material side. Furthermore, due to cable loops occurring occurring on the module connection cables and the junction boxes mechanical stress is reduced.

Both the positive pole junction box and the negative pole junction box each have a can body and a connection piece. The positive pole or negative pole connection piece extends from the positive pole resp. Negative pole can body in an extension direction, so that it forms a projection of the respective can body, which extends in this extension direction. According to the positive pole connecting piece and the negative pole connecting piece are aligned in opposite directions, so that the positive pole connecting piece extends from the positive pole can body in its extension direction so that it faces a module longitudinal or transverse edge, while the negative terminal extends from the negative pole can body in its extension direction so that it has to another module longitudinal or transverse edge, which is different from the aforementioned longitudinal or transverse edge to which the positive pole connecting piece points.

The module longitudinal edges and the module transverse edges of the module body are preferably arranged perpendicularly or substantially perpendicular to one another. In the case of a top view of the module front side or the module rear side, the module body then has a rectangular shape. The module body may also be square when viewed on the module front or module back.

In an advantageous preferred embodiment, the positive pole junction box and the negative pole junction box are formed as identical plastic injection molded parts or as identical 3d pressure parts. That is, the positive pole junction box and minus pole junction box are mounted as identical components in relation to each other, for example, rotated by 180 ° to each other on the back of the module body. This can continue to save costs, because only one injection molding tool is required or only for a 3d component, the programming and setup of a 3d printer is necessary.

The positive pole junction box and the negative pole junction box are preferably mounted in such a way that the positive pole connecting piece and the negative pole connecting piece extend parallel to one another. When connecting two such adjacent juxtaposed solar modules by means of the module connection cable, a straight or substantially straight cable management between the positive pole junction box of the first solar module and the negative terminal box of the second solar module can be achieved. As a result, module connection cable material and associated costs can continue to be saved.

In a preferred embodiment, the positive pole junction box and the negative pole junction box are spaced apart from each other in edge areas opposite module modules. Longitudinal edges mounted. More preferably, the positive pole junction box and the negative pole junction box of this first solar module are mounted such that after the adjacent arrangement of the module transverse edge of another, second, identically formed solar module parallel to the module transverse edge of the first solar module of the negative terminal of the first solar module Extending direction, which extends to the extension direction of the positive pole connecting piece of the adjacently arranged second solar module at an angle of less than 20 degrees, more preferably less than 10 degrees. As a result, a direct cable routing of the module connection cable can be achieved, which should connect the said connection piece.

In a further preferred embodiment, a central box with a bypass diode connected therein to the solar module is arranged between the positive pole junction box and the negative pole junction box. Preferably, the central box is connected to the positive pole junction box and the negative terminal box via a cross connector of the solar module.

Preferably, the positive pole junction box and the negative terminal box also connected to the solar module bypass diodes. These usually serve for a plurality of solar cells connected in series in the solar module as protection against so-called hot spots. The bypass diodes are arranged between so-called rails, which respectively form the cathode and anode of the electrical diode terminal, in the junction boxes and, if present, in the central outlet.

In a preferred embodiment, the negative terminal and the positive terminal have each a connector element for connecting an electrical module connection cable. The connector elements simplify the installation of the electrical module connection cable to the respective connecting piece.

The invention further relates to a solar module system with a plurality of identically formed solar modules according to one or more of the described embodiments, wherein the solar modules adjacent to each other with their module transverse edges and arranged parallel to each other and the solar modules with electrical module connection cables are electrically interconnected in series with each other, without education of cable loops between the solar modules. Since there is no bending radius of the module connection cable due to the avoidance of the cable loops, there is less mechanical stress on the module connection cables and less weight acts on the junction boxes.

• 1 eine Teil-Draufsicht auf ein Solarmodul-System gemäß dem Stand der Technik;
• 2 eine Teil-Draufsicht auf ein erfindungsgemäßes Solarmodul-System; und
• 3 eine Teil-Draufsicht auf die Rückseite eines erfindungsgemäßen Solarmoduls.

Further properties and advantages of the invention are shown in connection with the figures and described below by way of example. It shows schematically and not to scale:

• 1 a partial top view of a solar module system according to the prior art;
• 2 a partial top view of an inventive solar module system; and
• 3 a partial plan view of the back of a solar module according to the invention.

1 shows a partial top view of a solar module system according to the prior art. To the description of 1 Reference is made to the introduction to the description in which 1 already described.

2 shows a partial plan view of an inventive solar module system. Shown is the top view on the back of the module 13 , This in 2 Solar module system shown corresponds to the in 1 shown solar module system with the difference that the positive pole junction box 2 and the negative terminal box 3 so on the back of the module 13 Oriented were mounted that with respect to an imaginary connecting line V between the positive pole junction box 2 and the negative terminal box 3 that the module back 13 in the first section A1 and in the second section A2 splits, the positive pole connector 211 towards the first section A1 and the negative pole connector 311 in the direction of the second section A2 has. The positive pole junction box 2 and the negative terminal box 3 Each solar module is mounted such that the negative terminal 311 each solar module an extension direction e that is to the extension direction e of the positive pole connecting piece 2 each adjacently arranged solar module extends at an angle of less than 20 degrees. As compared to the 1 and 2 can be seen, require the electrical module connection cable 6 of the solar module system according to the invention a shorter length than the electrical module connection cable 6 of the solar module system according to the prior art and form in contrast to these no cable loops.

3 shows a partial plan view of a solar module according to the invention. Shown is the partial plan view of a module back 13 a solar module of in 2 shown system according to the invention, wherein the distance between positive pole junction box 2 , Central box 4 and negative pole junction box 3 has been reduced for the sake of clarity. The positive pole junction box 2 is the positive pole can body 21 , the negative pole junction box 3 with the negative pole can body 31 and the central box 4 with a central body 41 educated.

The positive pole junction box 2 , the negative pole junction box 3 and the central box 4 each have a bypass diode connected to a plurality of solar cells from the solar module 5 on, each on so-called Rails 7 is mounted in the form of metal plates. To the positive pole connection piece 211 the positive pole junction box 2 is a connector element 2111 assembled. To the negative pole connector 311 the negative terminal box 3 is also a connector 3111 assembled.

To the connector elements 2111 . 3111 is in each case an electrical module connection cable 6 with the help of a connector 8th assembled. Inside the junction boxes, an electrical cable leads to a rail 7 to which the bypass diode 5 is contacted. In the negative pole junction box 31 is this electrical line with the as the cathode for the bypass diode 5 contacted acting rail.

The positive pole junction box 2 and the negative terminal box 3 are so on the back of the module 13 mounted that the positive pole connecting piece 211 and the negative pole connector 311 but along the imaginary connecting line V in opposite directions but pointing in parallel to each other in the extension direction e extend. This geometric arrangement arises when the negative terminal box 3 and the positive pole junction box 2 be produced as identical components and when mounting on the back 13 of the module body 1 are arranged rotated by 180 degrees to each other.

Notwithstanding the illustrated purely exemplary connection of the bypass diode 5 can be made their electrical connection without electrically conductive rails via plug-in elements.

LIST OF REFERENCE NUMBERS

A1

first section

A2

second part

e

extension direction

1

module body

11

Module longitudinal edge

12

Module end edge

13

Module back

2

Positive terminal junction box

21

Positive can body

211

Positive connection piece

2111

Connector element

3

Negative terminal connection box

31

Negative pole can body

311

Negative pole connection stub

3111

Connector element

4

Central box

41

Central can body

5

Bypass diode

6

Module connection cable

7

Rail

8th

connector

Claims (9)

Solar module with • a plate-shaped module body (1) with two module longitudinal edges (11) and with two module transverse edges (12), the module body (1) further comprising a module front and a module back (13), • one on the module back (13) mounted positive terminal box (2) with a positive pole can body (21) having a positive pole connecting piece (211) for electrical connection of the solar module via the positive terminal box (2) and • one spaced from the positive pole junction box (2) on the back of the module (13) mounted negative terminal box (3) with a negative terminal box body (31) having a negative pole connection piece (311) for electrical connection of the solar module via the negative terminal box ( 3), characterized in that the positive pole junction box (2) and the negative terminal box (3) are mounted on the module back (13) such that with respect to an imaginary connecting line (V) between the positive pole Anschlußdo se (2) and the negative terminal box (3), which divides the module back (13) in a first section (A1) and in a second section (A2), the positive pole connecting piece (211) in the direction of the first portion (A1) and the negative pole connecting piece (311) in the direction of the second portion (A2) or the positive pole connecting piece (211) and the negative pole connecting piece (311) along the imaginary connecting line (V) facing in opposite directions. Solar module according to Claim 1 , characterized in that the positive pole junction box (2) and the negative terminal box (3) are formed as identical plastic injection molded parts or as identical 3d-pressure parts. Solar module according to Claim 1 or 2 , characterized in that the positive pole junction box (2) and the negative terminal box (3) are mounted such that the positive pole connecting piece (311) and the negative pole connecting piece (311) extend parallel to each other. Solar module according to Claim 3 , characterized in that the positive pole junction box (2) and the negative terminal box (3) spaced from each other in edge regions opposite module longitudinal edges (11) are mounted. Solar module according to Claim 4 , characterized in that the positive pole junction box (2) and the negative terminal box (3) of this first solar module are mounted such that after the adjacent arrangement of the module transverse edge (12) of another, second, identically formed solar module parallel to the module Lateral edge (12) of the first solar module of the negative pole connecting pieces (311) of the first solar module has an extension direction which extends to the extension direction of the positive pole connecting piece (211) of the adjacently arranged second solar module at an angle of less than 20 degrees. Solar module according to one of the preceding claims, characterized in that between the positive terminal box (2) and the negative terminal box (3) a central box (4) is arranged with a bypassed therein with the solar module bypass diode (5). Solar module according to one of the preceding claims, characterized in that the positive pole connection box (2) and the negative terminal box (3) with the solar module interconnected bypass diodes (5). Solar module according to one of the preceding claims, characterized in that the negative pole connecting piece (311) and the positive pole connecting piece (211) each have a plug connection element (6) for connecting an electrical module connection cable (6). Solar module system having a plurality of identically formed solar modules according to one of the preceding claims, wherein the solar modules with their module transverse edges (12) adjacent and arranged parallel to each other and the solar modules with electrical module connection cables (6) are interconnected electrically in series with each other without the formation of Cable loops run between the solar modules.

Images