WO2019048007A1

WO2019048007A1 - Solar module and solar module system

Info

Publication number: WO2019048007A1
Application number: PCT/DE2018/100765
Authority: WO
Inventors: Robert Olyschläger; Henning Busse; Richard Won; Thomas Spiess
Original assignee: Hanwha Q Cells Gmbh
Priority date: 2017-09-08
Filing date: 2018-09-07
Publication date: 2019-03-14
Also published as: DE102017120795A1

Abstract

The invention relates to a solar module comprising; a plate-shaped module element (1) having two module longitudinal edges (11) and two module transverse edges (12), with the module element (1) in turn having a module front side and a module rear side (13); a positive-pole connection socket (2) mounted on the module rear side (13) and having a positive-pole socket element (21) with a positive-pole connection part (211) for electrically connecting the positive-pole connection socket (2); and a negative-pole connection socket (3) mounted on the module rear side (13) at a distance from the positive-pole connection socket (2) and having a negative-pole socket element (31) with a negative-pole connection part (311) for electrically connecting the negative-pole connection socket (3). According to the invention, the positive-pole connection socket (2) and the negative-pole connection socket (3) are mounted on the module rear side (13) in such a way that, relative to a notional connecting line (V) between the positive-pole connection socket (2) and the negative-pole connection socket (3), dividing the module rear side (13) into a first section (A1) and a second section (A2), the positive-pole connection part (211) points in the direction of the first section (A1) and the negative-pole connection part (311) points in the direction of the second section (A2), or the positive-pole connection part (211) and the negative-pole connection part (311) point along the notional connecting line (V) in opposing directions. The invention also relates to a solar module system comprising multiple identically designed solar modules of this type.

Description

Title: Solar Module and Solar Module System 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 module transverse edges. The module body has a positive pole junction box mounted on the back of the module and a negative pole junction box mounted at a distance from the positive pole junction 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 shown in Fig. 1 in partial plan 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 transverse module edges 12 and furthermore a module back 13 and a module front side (not shown). The module front sides of the solar modules can not be seen in FIG. 1 because FIG. 1 shows a plan view of the module rear sides 13 of the solar modules. The solar modules are adjacent to their module transverse edges 12 and arranged parallel to each other. Each module body 1 has a mounted on the module rear side 13 plus pole junction box 2 with a positive pole can body 21, the positive pole connecting piece 211 for

electrical connection of the solar module via the positive pole connection box 2 on. Furthermore, a spaced from the positive terminal box 2 mounted on the back of module 13 negative terminal box 3 is provided with a negative pole can body 31 having a negative terminal 311 for electrical connection of the solar module via the negative terminal box 3. The positive terminal box 2 and the negative terminal box 3 are spaced from each other in edge regions opposite module longitudinal edges 11 mounted. Both the positive terminal box 2 and the negative terminal box 3 therefore each have a can body 21 and 31 and a connecting piece 21 1 and 31 1 on. The positive pole connecting piece 21 1 extends from the positive pole can body 21 in an extending direction (not shown) so as to form a projection of the positive pole can body 21 extending into the

Extension direction extends. For the negative terminal 31 1 of the negative pole can body 31 applies accordingly. The positive pole junction box 2 and the negative pole junction box 3 are mounted on the module rear side 13 such that with respect to an imaginary connecting line V between the positive terminal box 2 and the negative terminal box 3, the module back 13 in a first section A1 and in a second section A2, the positive pole connecting piece 21 1 and the negative pole connecting piece 31 1 each module body 1 in the same direction - purely by way of example in the direction of the second section A2 - have. The positive pole connecting piece 21 1 and the negative pole connecting piece 31 1 are aligned so that the positive pole connecting piece 21 1 extends from the positive pole can body 21 in the direction of extension, that it faces the module transverse edge 12, to which also the negative pole connecting piece 31 1, which extends from the negative pole can body 31 in its extension direction. The positive pole connecting piece 21 1 and the negative pole connecting piece 31 1 therefore have the same module transverse edge 12 and therefore in the same direction.

Each module body 1 further comprises a central box 4, which is centrally or substantially centrally on the imaginary between the positive terminal box 2 and the negative terminal box 3 on the module back 13

Connecting straight line V is mounted, which runs between the positive pole junction box 2 and the negative pole junction box 3 thought. The solar modules are connected to each other electrically in series with electrical module connection cables 6, which each connect a negative pole connection piece 31 1 of a first solar module with a positive pole connection piece 21 1 of a second solar module arranged adjacently. 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 when the direction of extension of the module connection cable 6 on the way from the positive terminal box 211 of a solar module for

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 minus pole junction boxes 3 to assemble. Because the positive terminal 211 and the negative terminal 311 point in the same direction, it is very difficult for the installers the respective connecting piece with the

associated module connection cable 6 to achieve. The positive pole junction boxes 2 and negative pole junction boxes 3 can only by means of

Module connection cable 6 are connected when more than one installer performs the work. One installer needs to lift one solar module so that the other installer on the back of the module body can make the necessary

make electrical connections with the respective module connection cables 6 with the respective junction boxes. The corresponding need for coordinated manual work causes high personnel costs. In addition, causing the required lengths of the cable loops having

Module connection cable 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 in the

Subclaims executed. 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 terminal box and the negative terminal box, the module back in a first section and in divides a second section, 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 connection 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 is a leadership of the plus pole junction box and negative pole junction box of two solar modules electrically connecting module connection cable 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 junction box of a first solar module, out of this automatically out in the direction of connecting via the electrical module connection cable Minuspol- connecting 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 on the

Module connection cable and reduced mechanical stress on the junction boxes.

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 extends. According to the positive pole connecting piece and the

Negative-pole connection piece aligned in opposite directions so that the positive-pole connection piece moves from the positive-pole box body into its own

Extension direction extends that it has to a module longitudinal or transverse edge, while the negative pole connecting piece extends from the negative pole can body in its extension direction so that it has to another module longitudinal or transverse edge, which of the above Longitudinal or transverse edge, to which the positive pole connecting piece points, is different.

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 negative 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 terminal 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 terminal box and the negative terminal box are mounted spaced apart from each other in edge regions of mutually opposite module longitudinal edges. More preferred are the positive pole junction box and the negative pole junction box of this first

Solar module mounted such that after the adjacent arrangement of the module transverse edge of a further, second, identically formed solar module parallel to the module transverse edge of the first solar module of the negative pole connecting piece of the first solar module has an extension direction to the extension direction of the positive pole connecting piece of the adjacent arranged second solar module at an angle of less than 20 degrees, more preferably less than 10 degrees. This can be a direct

Cable management of the module connection cable are to 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

Plug-in elements simplify the installation of the electrical

Module connection cable to the respective connection 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 run. Since there is no bending radius of the module connection cable by avoiding the cable loops, there is less mechanical stress on the module connection cables and less

Weight acts on the junction boxes.

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:

Fig. 1 is a partial plan view of a solar module system according to the prior art;

FIG. 2 shows a partial plan view of a solar module system according to the invention; FIG. and Fig. 3 is a partial plan view of the back of a device according to the invention

Solar module.

Fig. 1 shows a partial plan view of a solar module system according to the prior art. For the description of Fig.1 reference is made to the introduction to the description in which Fig. 1 has already been described.

Fig. 2 shows a partial plan view of an inventive solar module system. Shown is the plan view of the module rear side 13. Das shown in Fig. 2 1 corresponds to the solar panel system shown in FIG. Junction box 2 and the negative terminal box 3, which divides the module back 13 in the first section A1 and in the second section A2, the positive terminal 21 1 in the direction of the first portion A1 and the negative terminal 31.1 in the direction of second section A2 points. The positive pole junction box 2 and the negative pole junction box 3 of each solar module are mounted such that the negative terminal 31 1 of each solar module has an extension direction E that corresponds to the extension direction E of the positive terminal 2 of each adjacent solar module at an angle of less than 20 degrees. As can be seen in the comparison of FIGS. 1 and 2, the electrical module connecting cables 6 of the solar module system according to the invention require a shorter length than the

electrical module connecting cable 6 of the solar module system according to the prior art and form in contrast to these no cable loops.

Fig. 3 shows a partial plan view of a solar module according to the invention. Shown is the partial plan view of a module rear side 13 of a solar module of the system according to the invention shown in FIG. 2, wherein the distance between positive terminal box 2, central box 4 and negative terminal box 3 has been reduced for clarity. The positive terminal box 2 is the positive pole can body 21, the negative terminal box 3 with the negative pole can body 31 and the central box 4 with a central body shell 41 is formed.

The positive pole junction box 2, the negative pole junction box 3 and the central box 4 each have a bypass diode 5 connected to a plurality of solar cells from the solar module, which is mounted in each case on so-called rails 7 in the form of metal platelets. To the positive pole connection piece 21 1 of the positive pole connection box 2, a plug connection element 21 1 1 is mounted. To the Minuspol- connection piece 311 of the negative terminal box 3 is also a connector 3111 mounted.

To the connector elements 2111, 3111 each an electrical module connection cable 6 is mounted by means of a connector plug 8. Inside the junction boxes leads an electrical line to a rail 7, where the bypass diode 5 is contacted. In the negative terminal box 31, this electrical line is contacted with the acting as a cathode for the bypass diode 5 rail.

The positive pole junction box 2 and the negative pole junction box 3 are mounted on the module back 13 so that the positive terminal 211 and the negative terminal 311 along the imaginary connecting line V face in opposite directions but are parallel to each other in the extending direction E extend. This geometric arrangement is obtained when the negative pole junction box 3 and the positive pole junction box 2 are produced as identical components and mounted on the

Rear side 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 whose electrical connection can be made without electrically conductive rails via plug-in elements.

LIST OF REFERENCE NUMBERS

A1 first section

A2 second section

E extension direction

1 module body

1 1 module longitudinal edge

12 module transverse edge

13 module rear side

2 positive pole junction box

21 positive pole can body

21 1 positive pole connection piece

21 1 1 connector element

3 negative terminal box

31 negative pole can body

31 1 negative pole connection piece

31 1 1 connector element

4 central box

41 central can body

5 bypass diode

6 module connection cable

7 rail

8 connector

Claims

claims:

1 . Solar module with

A plate-shaped module body (1) with two module longitudinal edges (1 1) and with two module transverse edges (12), the module body (1) furthermore having a module front side and a module back side (13),

• a positive pole junction box (2) mounted on the back of the module (1 3) with a positive pole body (21) with a positive terminal (21 1) for electrical connection of the solar module via the positive pole junction box (2) and

A negative terminal box (3) mounted at a distance from the positive terminal box (2) on the back of the module (13)

Negative pole can body (31), which has a negative pole connection piece (31 1) for the electrical connection of the solar module via the negative pole connection box (3),

characterized in that

the positive pole junction box (2) and the negative pole junction box (3) are mounted on the module rear side (13) in such a way that with respect to an imaginary connecting line (V) between the positive pole junction box (2) and the negative pole junction box (3 ), which divides the module rear side (1 3) into a first section (A1) and into a second section (A2), the positive pole connecting piece (21 1) in the direction of the first section (A1) and the negative pole connecting piece ( 31 1) in the direction of the second section (A2)

or the positive pole connecting piece (21 1) and the negative pole connecting piece (31 1) along the imaginary connecting line (V) facing in opposite directions.

2. Solar module according to claim 1, characterized in that

the positive pole junction box (2) and the negative pole junction box (3)

are designed as identical plastic injection-molded parts or as identical 3d-pressure parts.

3. 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 (31 1) and the negative pole connecting piece (31 1 ) extend parallel to each other.

4. Solar module according to claim 3, characterized in that the positive pole junction box (2) and the negative terminal box (3) spaced

one another in edge regions opposite module longitudinal edges (1 1) are mounted.

5. Solar module according to claim 4, characterized in that the positive terminal box (2) and the negative terminal box (3) of this first

Solar module are mounted such that after the adjacent arranging the module transverse edge (12) of another, second, identically formed solar module parallel to the module transverse edge (12) of the first solar module of the negative pole connection piece (31 1) of the first solar module a

Extending direction which extends to the extension direction of the positive pole connecting piece (21 1) of the adjacently arranged second solar module at an angle of less than 20 degrees.

6. Solar module according to one of the preceding claims, characterized

characterized in that between the positive pole junction box (2) and the negative pole junction box (3) a central box (4) is arranged with a therein bypassed with the solar module bypass diode (5).

7. Solar module according to one of the preceding claims, characterized

characterized in that the positive pole junction box (2) and the negative terminal box (3) with the solar module connected bypass diodes (5).

8. Solar module according to one of the preceding claims, characterized

characterized in that the negative terminal (31 1) and the positive pole Connecting piece (21 1) each have a plug connection element (6) for connecting an electrical module connection cable (6).

9. solar module system with 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, the without Formation of cable loops between the solar modules run.