DE202017103212U1 - Connector for making a cable connection - Google Patents

Abstract

Connecting part for producing a cable connection for the photovoltaic area with
a housing (2) for receiving a connection line (3a, 3b) provided with an insulation of a photovoltaic module (5), characterized in that
the housing (2) comprises a first housing part (2a) and a second housing part (2b), which together form a receiving contour for the connecting line (3) provided with the insulation and can be joined together, including the latter
a connection region (4) for the end region of a branch line (6a, 6b) which can be contacted with the insulation connection line (3a, 3b) is provided, such that the end region of the branch line (6a, 6b), preferably blunt, at or in the region of the outside of the insulation of the connecting line (3) is positionally immovable,
an electrically conductive mandrel (7), which is insertable into the housing (2) on the opposite side of the connection region (4), is provided,
and the mandrel (7), the connecting line (3) and the end portion of the branch line (6a, 6b) in the housing (2) are positioned relative to each other such that the mandrel (7) an electrical contact bridge between the connecting line (3a, 3b) and branch line (6a, 6b) forms.

Description

The present innovation relates to a connection part for the production of a cable connection for the photovoltaic area and to an arrangement which comprises such a connection part. Furthermore, the present innovation relates to a photovoltaic component.

Technological background

Photovoltaic systems are widespread nowadays. In 2015, there were worldwide photovoltaic systems with a total output of 227GW. It is expected that the annual growth of photovoltaic systems will increase to 100GW by 2020 and the installed capacity could reach between 3,000 and 10,000GW by 2030. Today photovoltaic technology, together with wind turbines, is the mainstay of the energy transition.

Initially, photovoltaics were operated without any sensor technology regarding the performance of the individual photovoltaic modules. With such systems it was therefore only with great difficulty possible to capture the performance of individual modules and thus to control the performance of the system.

In the course of further development of photovoltaic systems, a sensor system was introduced with which certain properties of a photovoltaic module, in particular DC voltage, direct current, temperature or vibrations, could be detected and evaluated. Such a sensor system meant that individual defective photovoltaic modules could be identified and replaced in order to keep the overall performance of the photovoltaic system at a necessary level.

Printed prior art

The DE 101 36 147 B4 relates to a method for monitoring individual photovoltaic modules using a module converter as part of each photovoltaic module, which comprises a plurality of separate sensors for measuring specific properties of a photovoltaic module, such as DC voltage, DC, temperature or vibration. The measured values are fed as analog signals to a microprocessor, which converts the analog signals into digital signals and supplies them to a power controller connected to a bus in the form of actual values. The installation effort required for this process is very expensive.

From the WO 2011/000505 A2 a method for monitoring individual photovoltaic modules is known, in which a microcontroller located in the junction box detects status parameters of the associated photovoltaic module, converts the status parameters into data together with an ID of the relevant photovoltaic module and feeds the latter in the form of data blocks over the existing electrical line means, so that they can be captured and processed by a central office.

From the EP 2 277 680 A1 a cable junction for connecting photovoltaic modules is known, which serves to connect the connecting cable of a photovoltaic module or a strand of photovoltaic modules with a leading to an inverter manifold. In this case, both the end area of the connecting line and the feed area of the busbar must be stripped. The stripped parts of the lines are soldered together, surrounded with a Vorvergussmasse and then with a Endverguss.

The DE 10 2010 025 549 A1 describes a one-dimensional solar connector for photovoltaic systems with a contact housing and a contact needle for contacting the conductor of a cable to be connected. The contact housing is provided with a thread which is intended to cooperate with a provided on a connection housing thread to introduce the contact pin predefined in the conductor of the cable to be connected when screwing the contact housing and the connection housing.

Object of the present invention

The object of the present invention is to provide a connection part for producing a cable connection for the photovoltaic area, with which an electrical connection of a branch line to a continuous connecting line can be carried out simply and inexpensively.

Solution of the task

The present object is solved by the features of claim 1. Advantageous embodiments of the present invention are claimed in the subclaims.

The innovation makes it possible to electrically contact a branch line without a stripped end area with a core exposed to the end face with a continuous connecting line which is not stripped in the contact area in a particularly simple and effective manner. This can save a considerable amount of installation work become. The connection can be made quickly and safely but can also be solved again if necessary. In particular, the connection part according to the invention makes it possible to electrically contact a sensor device between the two connection lines of a photovoltaic module via the branch line without having to undertake costly and expensive measures at the junction box of the photovoltaic module. This in turn results in the advantage that existing photovoltaic systems can be retrofitted in a particularly simple and cost-effective manner with sensors for checking the performance and / or operating parameters of the individual photovoltaic systems and thus the performance of such systems can be considerably increased. For retrofitting a sensor device, it is only necessary to contact the two connection lines of the photovoltaic module with the sensor device using a connection part according to the invention. Surprisingly, it has been found that the contacting of the two lines by means of a piercing mandrel is sufficient for a "connection" of a sensor device for measuring performance parameters of a photovoltaic module, since the signals required in this regard for the transmission in the power line are only in the mA range.

Characterized in that the mandrel is screwed into the housing of the connecting part, the contacting with a simple tool, such as a cordless screwdriver or the like, can be performed.

To apply the necessary force, the mandrel is preferably connected to a threaded rod, which can be screwed from the outside into the housing of the connecting part. The threaded rod can for this purpose preferably at its end face a recess for the insertion of a tool, e.g. a hexagonal insert or a so-called Torx® insert.

It is advantageous if, in the introduction region of the mandrel, sealing means are provided which prevent moisture from entering the region of the contact point via the access opening of the mandrel or threaded rod. In particular, such sealant can be used as z. B. cylindrical elastic material sealing block may be provided, which is penetrated by the mandrel on the one hand, on the other hand is brought under a permanent compressive stress due to the introduction of the mandrel or the threaded rod and therefore effectively seals this access side of the housing.

In order to fix the branch line immovably in the housing, clamping means are provided for clamping the end region of the branch line in the housing. As a result, a permanent contact can be maintained even under mechanical stress of the branch line.

As a clamping means designed as an additional part terminal block is provided in an advantageous manner, which is inserted into a corresponding recess on one of the two housing parts and fixed there and having a contact area, which receives the end portion of the branch line together with the relevant housing part. Additionally or alternatively, the terminal block can also ensure a seal in the region of the inlet of the branch line.

In particular, the contact region of the clamping block can have at least one projection and / or at least one contouring which presses into the insulation of the end region of the branch line and brings about a latching.

Furthermore, the clamping block may have one or a recess or projection which acts in the direction of the branch line and which cooperates with a corresponding projection or recess on the housing. As a result, the clamping block is secured against being pulled out of the housing in the direction of the branch line. The clamping block can in this case preferably be plugged onto the one housing part in a direction perpendicular to the course of the branch line.

Conveniently, the material of the terminal block has a different Shore hardness compared to the material of the housing parts and / or consists of different material. For example, the Shore hardness of the terminal block compared to that of the housing parts higher, whereby an increased holding force can be achieved on the end portion of the branch line. Also or alternatively, the terminal block may also have a certain elasticity, whereby a sealing effect is justified.

In order to achieve an effective connection between the housing and the continuous connecting line, the housing parts are connected with the inclusion of the connecting line with each other, preferably locked together.

A particularly simple and quickly performed connection is made possible when the housing parts are pivotable about a common pivot axis in the manner of a pair of scissors. This not only allows an advantageous positioning of the connecting parts to each other and the connecting line to the connection parts, but also leads to a significant reduction in set-up times.

Advantageously, the one housing part arranged laterally curved retaining tabs and the other housing part with the curved retaining tabs, laterally arranged retaining struts, wherein the curved retaining tabs from a certain angular position of the housing parts to each other on the struts suspended and retaining tabs and retaining struts in changing the angular position with each other a Verhakungseffekt justify. This variant requires a secure connection with a reduced number of parts and at the same time allows to be carried out by injection molding manufacturing the connecting parts.

On the opposite side, the one housing parts may have locking pins which engage in the closed position of the housing parts on the other housing part latching or there engage around a housing projection latching.

Preferably, the two housing parts are provided as injection molded parts.

The connection technology of the two housing parts is preferably dimensioned and / or designed so that the housing parts are in the closed position under pressure to each other in connection.

The present innovation also includes an arrangement comprising a photovoltaic module, a junction box for connecting the photovoltaic module to a bus, a first connecting line, a second connecting line, wherein the first and second connecting line connect the junction box to the manifold and wherein a connection part is attached to the connecting line , which is designed according to at least one of claims 1-16.

In particular, the connector may serve to connect the photovoltaic module to a sensor device for detecting power or status parameters of the photovoltaic module, such as a photovoltaic module. the DC voltage, DC current, temperature, the individual ID of the photovoltaic module and / or vibrations.

The sensor device is preferably connected to the connection lines via two connection parts.

Preferably, the sensor device can be glued to the photovoltaic module.

The sensor device detects or includes the power or status parameters of the photovoltaic module, for. B. the voltage per unit time, generates data blocks or data signals (in particular in the form of modulated current signals) concerning status parameters of the photovoltaic module, and / or an individual ID relating to the photovoltaic module and feeds corresponding data signals into the connecting line, without consuming measures on the junction box or an exchange of the same is or is necessary.

Furthermore, the present innovation relates to a photovoltaic component or photovoltaic module comprising a sensor device, a first branch line, a second branch line, wherein the first branch line and the second branch line are each connected to the sensor device, a first connection part, a second connection part, wherein the first connection part and the second connection part are connected via the first branch line and the second branch line to the sensor device, wherein a connection part according to at least one of claims 1 to 16 is provided according to the innovation. A corresponding arrangement can be advantageously used for retrofitting existing photovoltaic systems.

Preferably, the above-described photovoltaic component is designed as a prefabricated component, which only needs to be installed in the region of the respective connection part by inserting the continuous connection lines and joining the housing parts of the opposite connection parts.

list of figures

• 1 eine stark vereinfachte schematische Darstellung eines Photovoltaikmoduls unter Verwendung eines neuerungsgemäßen Anschlussteils;
• 2a eine perspektivische Darstellung des neuerungsgemäßen Anschlussteils im Einbauzustand,
• 2b eine Explosionszeichnung des neuerungsgemäßen Anschlussteils nach 2a sowie
• 2c eine perspektivische Darstellung der Unterseite des neuerungsgemäßen Anschlussteils gemäß 2b vor dem Befestigen des Klemmblocks.

Hereinafter, a particular embodiment of the present invention will be explained with reference to drawings. Recurring features are provided for clarity only once with a reference numeral. Show it:

• 1 a highly simplified schematic representation of a photovoltaic module using a connector according to the innovation according to the invention;
• 2a a perspective view of the inventive connection part in the installed state,
• 2 B an exploded view of the inventive connector after 2a such as
• 2c a perspective view of the underside of the inventive connection part according to 2 B before attaching the terminal block.

numeral 18 in 1 Designates as part of a photovoltaic system an arrangement which is a photovoltaic module 5 which is intended to be from solar energy to electric power Generate and this in a manifold 16 to feed the photovoltaic system. The photovoltaic module 5 includes a plurality of individual (not shown) photovoltaic cells, all of which are connected in series.

numeral 15 refers to the so-called "junction box", which is intended to the photovoltaic module via a first and second connecting line 3a . 3b with the leading to a (not shown) inverter manifold 16 connect to. The proportions in 1 are somewhat distorted because of the clearer illustration.

In the area of each free connection line 3a . 3b is a renewal connector 1a . 1b arranged, which serves to a sensor device 17 via respective branch lines 6a . 6b with the connecting cables 3a . 3b of the photovoltaic module 5 connect to.

In the sensor device 17 it is a device for, preferably continuous, determination of at least one power or status parameter of the associated photovoltaic module 5 , Preferably, via the sensor device 17 the voltage and / or the temperature are detected or continuously monitored and via data blocks in the current-carrying connection line 3a . 3b be fed. Preferably, amplitude and / or frequency-modulated signals (current signals in the mA range) are used for this purpose. In a corresponding manner, the individual ID of the relevant photovoltaic module can also be fed in. For example, the sensor device 17 on the photovoltaic module 5 be glued on.

The 2a shows in enlarged, perspective representation, the connection part 1a out 1 in the assembled state. It is used to establish a T-connection between the connecting cable 3a and the branch line 6a leading to the sensor device 17 leads. The connection part 1a includes a housing 2 , which by two housing parts 2a . 2 B is formed, which is the connecting line 3a record as well as a supply of the branch line 6a in the field of a recording 4 as well as and a contacting of connecting cable 3a and branch line 6a enable. At the reception 4 opposite side of the connection part 1a there is a threaded rod 8th with a tool insert 12 , ie a front-side recess for inserting a suitable tool, such as a hexagonal insert or a so-called. Torx® insert or the like.

The 2 B shows the structure of the connection part 1a according to 2a in detail. The second connection part 1b includes a rounded continuous support contour 20b into which the connection line 3a , without the insulation must be removed, can be inserted. The first connection part 1a includes an analogous corresponding support contour 20a , which on the opposite side of the connecting cable 3a rests.

Perpendicular to the course of the support contour 20a . 20b is a recording 4 for the blunt end of the branch line 6a intended. This is a sleeve section 24 in the second housing part 2 B in the field of recording 4 molded, through which the blunt cut connecting cable 6a in the case 2 of the connection part 1a hineinverläuft. According to 2c (the connecting cable 3a is not shown for clarity) is on the sleeve section 24 opposite side of the housing part 2 B a recess 21 provided, in which a in 2 B illustrated terminal block 10 used and with the housing part 2 B firmly bonded, preferably glued or welded (eg by ultrasound). The terminal block 10 completes the sleeve 24 and allows the end portion of the branch line 6a in the housing part 2 B firmly clamped around and also to prevent ingress of moisture.

The terminal block 10 For this purpose has a concave contouring, at least approximately in the subregion of a surface of the branch line 6a equivalent. In addition, in the area of contouring projections 11 intended. On the outside of the terminal block 10 can z. B. on both sides in each case a groove 23 be arranged, in which a projection 26 in the region of the recess 21 intervenes.

Preferably, the terminal block from a to the housing part 2 B different material, such as a more elastic material to produce an optimum sealing effect or alternatively a harder material to achieve an optimal holding effect or, if necessary, a combination of the two.

How out 2c the branch line is initially visible 6a in the housing part 2 B inserted, so that the front end of the branch line is in position. Subsequently, the terminal block is under application of a compressive force (see arrow) in the recess 21 used so that the protrusions 11 in the insulation of the connecting cable 6a Press in and on the housing part 2 B firmly fixed preferably by laser with the latter welded.

The positioning of the connecting cable 3a and the branch line 6a through the connection part 1a . 1b takes place such that these lie in a common plane a T-connection within the connection part 1a form.

Once the connection cable 3a as well as the branch line 6a in the housing part 2 B are inserted and the terminal block 10 is in position, the housing part 2a on one side arranged curved retaining tabs 13 in a certain angular position in the range provided at corresponding positions retaining struts 14 hooked with corresponding through holes and then to the second housing part 2 B towards the pivot axis S pivoted and with the lower housing part 2 B preferably locked locked. The fixation takes place via locking pins 22 with locking lugs 27 which in the closed position the other housing part 2 B engage on the underside latching and thus a secure connection of the two housing parts 2a . 2 B ensure each other.

Conveniently, the two housing parts 2a . 2 B designed as injection molded parts ie plastic parts. In addition, the connection of the two housing parts 2a . 2 B to each other such that the housing parts 2a . 2 B in closed position ie mounting situation under pressure to each other in connection.

At the reception 4 the branch line 6a opposite side of the connection part 1a is a sleeve-like body 25 in the lower housing part 2 B molded and with a threaded hole 19 fitted. This is, for example, a thread formed during production or an overmolded threaded sleeve. The threaded hole 19 serves to a threaded rod 8th with a mandrel attached to its front end 7 in the case 2 of the connection part 1a to be able to screw in. For this purpose, on the outer end side of the threaded rod 8th a tool assignment 12 in the form of a recess for use of a tool, such as a hexagon, provided.

To seal the connection is a, preferably cylindrical, sealing block 9 of an elastomeric material in the frontal opening of the threaded bore 19 inserted. When assembled, the spine pierces 7 on the one hand, the sealing block 9 and on the other hand, the insulation of the connecting cable 3a and at the same time provides an electrical contacting of the core of the connecting cable 3a with the wire of the branch line 6a ago. At the same time sets the threaded rod 8th the sealing block 9 under a compressive stress, whereby the seal-side access is sealed.

Preferably, the above-described photovoltaic component is provided as a prefabricated component, which only still in the connection region of the respective connection part 1a . 1b by inserting the continuous connecting cables 3a . 3b and joining the housing parts 2a . 2 B the opposite connection parts 1a . 1b and screwing in the mandrel 7 must be installed.

The present innovation ensures a novel connection part, with the retrofitting of existing photovoltaic systems with sensors can be carried out in a particularly simple and cost-effective manner.

LIST OF REFERENCE NUMBERS

1a

connector

1b

connector

2

casing

2a

housing part

2 B

housing part

3a

connecting cable

3b

connecting cable

4

admission

5

photovoltaic module

6a

branch line

6b

branch line

7

mandrel

8th

threaded rod

9

seal block

10

terminal block

11

head Start

12

tool insert

13

retaining tab

14

holding strut

15

junction box

16

manifold

17

sensor device

18

arrangement

19

threaded hole

20a

contour support

20b

contour support

21

recess

22

latching pin

23

groove

24

sleeve section

25

sleeve-like body

26

head Start

27

locking lugs

S

swivel axis

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 10136147 B4 [0005]
• WO 2011/000505 A2 [0006]
• EP 2277680 A1 [0007]
• DE 102010025549 A1 [0008]

Claims (21)

Connecting part for producing a cable connection for the photovoltaic area with a housing (2) for receiving a provided with an insulation connecting line (3a, 3b) of a photovoltaic module (5), characterized in that the housing (2) has a first housing part (2a) and a second housing part (2b), which together form a receiving contour for the connection line (3) provided with the insulation and can be joined together to include a connection region (4) for the end region of a branch line provided with the insulation (3a, 3b) (6a, 6b) is provided, such that the end region of the branch line (6a, 6b), preferably blunt, can be positioned immovably on or in the region of the outside of the insulation of the connection line (3), one on the opposite side of the connection region (FIG. 4) in the housing (2) insertable, electrically conductive mandrel (7) is provided, and the Do (7), the connecting line (3) and the end region of the branch line (6a, 6b) in the housing (2) are positioned relative to each other such that the mandrel (7) an electrical contact bridge between the connecting line (3a, 3b) and branch line (6a 6b). Connection part after Claim 1 , characterized in that the mandrel (7) in the housing (2) can be screwed. Connection part after Claim 1 or 2 , characterized in that the mandrel (7) is connected to a threaded rod (8). Connecting part according to at least one of the preceding claims, characterized in that in the introduction region of the mandrel (7) sealing means, preferably in the form of a sealing block (9) are provided. Connection part after Claim 4 , characterized in that the sealing means are pierced by the mandrel (7). Connecting part according to at least one of the preceding claims, characterized in that clamping means for a clamping of the end region of the branch line (6) in the housing (2) are provided. Connection part after Claim 6 , characterized in that as clamping means a clamping block (10) is provided which is fastened in a recess (11) of one of the housing parts (2a or 2b) and has a contact region which, together with the other housing part (2b or 2a) with the End region of the branch line (6) is contactable. Connection part after Claim 7 , characterized in that the contact region of the clamping block (10) has at least one projection (11) and / or at least one contouring. Connection part after Claim 7 or 8th , characterized in that the clamping block (10) one or in the direction of the branch line (6) effective recess (11) or projection which cooperates with a corresponding projection or recess on the housing (2). Connecting part according to at least one of the preceding claims, characterized in that the clamping block (10) as a separate component with the housing part (2a or 2b) fixedly connected is preferably welded. Connecting part according to at least one of the preceding claims, characterized in that the housing parts (2a, 2b) can be locked together. Connecting part according to at least one of the preceding claims, characterized in that the housing parts (2a, 2b) are mutually pivotable about a common pivot axis S in the manner of a pair of scissors. Connecting part according to at least one of the preceding claims, characterized in that the one housing part (2a or 2b) curved retaining tabs (13) and the other housing part (2b or 2a) with the curved retaining tabs (13) corresponding retaining struts (14), and the curved retaining tabs (12) from a certain angular position of the housing parts (2a, 2b) to each other on the struts suspended and retaining tabs (13) and retaining struts (14) are hooked together when changing the angular position. Connecting part according to at least one of the preceding claims, characterized in that the one housing parts (2a or 2b) latching pin (22) which engage in the closed position of the housing parts (2a, 2b) on the other housing part (2b and 2a) latching. Connecting part according to at least one of the preceding claims, characterized in that the housing parts (2a or 2b) are injection-molded parts. Connecting part according to at least one of the preceding claims, characterized in that the housing parts (2a or 2b) are under pressure to each other in connection. Arrangement comprising a photovoltaic module (5), a junction box (15), a first connecting line (3a), a second connecting line (3b), wherein the first and second connecting line (3a, 3b) connect the junction box (15) to a collecting line (16) , and wherein a connection part (2a and / or 2b) is attached to the connection line (3a and / or 3b), characterized by a connection part according to at least one of the preceding claims. Arrangement according to Claim 17 , characterized in that the connection part (2a and / or 2b) is connected to a sensor device (17). Arrangement according to Claim 18 , characterized in that the sensor device (17) is in communication with the respective connection part (2a or 2b) via the associated connection line (3a or 3b). Arrangement according to Claim 17 or 18 , characterized in that the sensor device (17) generates data blocks concerning status parameters of the photovoltaic module (5) and feeds them into the connecting line (3a, 3b). Photovoltaic component comprising a sensor device (17), a first branch line (6a), a second branch line (6b), wherein the first branch line (6a) and second branch line (6b) are each connected to the sensor device (17), a first connection part (1a ), a second connection part (1b), wherein the first connection part (1a) and the second connection part (1b) are connected via the first branch line (6a) and second branch line (6b) to the sensor device (17), characterized by a connection part according to at least one of the Claims 1 to 16 ,

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