CN207819846U - Photovoltaic modules - Google Patents

Abstract

The utility model provides a kind of photovoltaic module, the busbar being connect including battery strings, with battery strings and the terminal box being connect with the busbar, the busbar is of a straight line type, one end is connected with battery strings, and the other end enters from the left and right sides of terminal box in the terminal box along the length direction of busbar.The mode of connection that the utility model passes through change busbar and terminal box, linear type busbar is used to be accessed from the left and right sides of terminal box, the problems such as being correspondingly connected with, being avoided using L-type busbar and its brought failure welding, connection exception with the plate terminal being distributed in advance in terminal box.

Description

Photovoltaic modules

technical field

The utility model relates to the field of photovoltaics, in particular to a photovoltaic module.

Background technique

Photovoltaic modules include battery strings, junction boxes, and bus bars that lead the battery strings into the junction box. As shown in Figure 1, the ends of the bus bars are usually bent vertically or welded with a lead wire, so that the bus bar 1 is L-shaped. The lead-out wires are inserted into the junction box 2 to be welded and connected to the copper terminals in the junction box. However, in the EL test of photovoltaic modules, it is found that the welding position of the lead wire and bus bar is abnormal (such as welding is not firm). There is a disconnection between the bars, and the power cannot be output normally. This abnormal situation mainly occurs in photovoltaic modules using L-shaped bus bars. Therefore, it is necessary to provide a new wiring method between bus bars and junction boxes to solve the above problems. technical problem.

Utility model content

In view of this, the utility model provides a photovoltaic module to improve the problem of abnormal contact between the L-shaped bus bar and the junction box in the prior art.

Specifically, the utility model is achieved through the following technical solutions: provide a photovoltaic module, including battery strings, bus bars connected to the battery strings, and junction boxes connected to the bus bars, the bus bars are linear, One end is connected with the battery string, and the other end enters the junction box from the left and right sides of the junction box along the length direction of the bus bar.

Further, the junction box includes a housing, terminals and diodes installed in the housing, the housing is provided with a left side wall and a right side wall, and the terminals have The connecting part and the main body extending from the connecting part to the center of the housing.

Further, the wiring part is located outside the main body, and the wiring parts are arranged in two rows adjacent to the left side wall and the right side wall of the housing respectively.

Further, the number of the terminals is four, which are distributed in a U shape.

Further, the number of the diodes is less than the number of the terminals, the diodes are provided with a base and mounting feet extending from the base, and the extending directions of the mounting legs of each diode are different.

Further, the number of the diodes is three, and the extension directions of the mounting legs of the three diodes jointly form a U shape.

Further, the bottom of the junction box is provided with a pair of slots respectively corresponding to the two rows of connection parts, for the bus bars to enter the box from the bottom of the junction box.

Further, the slots are elongated, and are respectively arranged adjacent to the left side wall and the right side wall of the housing.

Further, the bus bars include a pair of long bus bars and a pair of short bus bars, and the pair of short bus bars are located inside the long bus bars and arranged parallel to the long bus bars.

Further, among the terminals in the U-shaped distribution, the terminals at the first and last positions are also provided with outlet parts, the outlet part, the connection part and the main body are integrally connected, and the outlet part is adjacent to the connection part , and the extension direction of the outlet part is parallel to the length direction of the long bus bar.

The utility model changes the connection mode of the bus bar and the junction box, that is, adopts the linear bus bar to connect from the left and right sides of the junction box, and connects with the pre-distributed plate terminals in the junction box correspondingly, avoiding the use of L-shaped bus bars The strip and its problems such as poor welding and abnormal connection.

Description of drawings

Fig. 1 is a connection mode of a bus bar and a junction box in the prior art.

Fig. 2 is the connection mode of the bus bar and the junction box in the photovoltaic module described in the present invention.

Fig. 3 is a schematic diagram of the internal connection of the junction box of the present invention.

Fig. 4 is a schematic view of the back of the junction box of the present invention.

Detailed ways

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present invention. Rather, they are merely examples of devices and methods consistent with aspects of the invention as recited in the appended claims.

Terms used in the present invention are only for the purpose of describing specific embodiments, but not intended to limit the present invention. As used in this disclosure and the appended claims, the singular forms "a", "the", and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It should also be understood that the term "and/or" as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

As shown in Figures 2 to 4, the utility model provides a photovoltaic module, including a battery string (not shown), a bus bar 10 connected to the battery string, and a junction box 20 connected to the bus bar 10, the The battery string includes a plurality of battery slices (not shown) distributed in an array and welding strips (not shown) connected to the surface of the battery slices.

The bus bar 10 is linear, and it is provided with a starting end A connected to the battery string ribbon and an end B connected into the junction box 20, and the starting end A and the end B are used to introduce the battery string into the junction box 20, wherein the bus bar 10 includes a pair of long bus bars 11 and a pair of short bus bars 12, the outer ends of the pair of long bus bars 11 are respectively connected to the first and last ends of the battery string, and the inner The ends are inserted into the junction box 20 , and the pair of short bus bars 12 are located inside the long bus bars 11 and arranged parallel to the long bus bars 11 .

The junction box 20 includes a housing 21, a number of plate terminals 22 located in the housing 21 and a number of diodes 23 mounted on the plate terminals 22, the housing 21 is provided with a left side wall 24 oppositely arranged and the right side wall 25, the plate terminal 22 is provided with a main body 26 extending toward the center of the housing 21 and a wiring portion 27 connected to the main body 26, the main body 26 is flat and located inside the wiring portion 27, For accommodating the diode 23, the number of the plate-shaped terminals 22 is the same as the number of the bus bars 10, and there are four, corresponding to the pair of long bus bars 11 and the pair of short bus bars 12 respectively, The connection portion 27 of each plate-shaped terminal 22 is adjacent to the left side wall 24 and the right side wall 25 of the housing 21, specifically, the connection portion 27 of the two plate-shaped terminals 22 is connected to the left side The walls 24 are adjacent, and the connection parts 27 of the other two plate-shaped terminals 22 are adjacent to the right side wall 25, and the main body 26 of each plate-shaped terminal 22 is located inside the connection part 27. In addition, on the connection part 27 There is also a slot 28 through which the bus bar 10 passes, so as to realize the welding connection with the end B of the bus bar 10 . The diode 23 is provided with a base body 230 and a mounting foot 231 extending from the base body 230. The base body 230 and the mounting foot 231 are respectively installed on the two plate-shaped terminals 22, that is, the mounting foot 231 will straddle the plate-shaped terminal 22 The diode 23 is erected on two plate-shaped terminals 22 through the gap between them, and the mounting feet 231 extend from the base body 230 toward the adjacent plate-shaped terminal 22. In a preferred embodiment of the present invention, the number of the diodes 23 The extension direction of the mounting feet 231 of the three diodes 23 together form a U-shape, and the distribution of the four plate-shaped terminals 22 is also U-shaped, that is, the plate-shaped terminals 22 are not along a straight line Arranged and distributed, the diodes 23 are not installed along the same direction, wherein, among the four plate-shaped terminals 22 distributed in a U-shape, the first and last two plate-shaped terminals 22 are used to connect with the long bus bar 11 and Also be provided with the outlet part 29 that is connected with cable 30, described outlet part 29, connection part 27 and main body 26 are all integrally connected, and described outlet part 29 and described connection part 27 are arranged adjacently, and the outlet part 29 The extension direction is parallel to the length direction of the long bus bar 11, as shown in Figure 3, it can be seen that the long bus bar 11, the short bus bar 12 and the cable 30 of the utility model are all parallel to each other, and they are all connected from the wiring The left and right sides of the casing 21 of the box 20 are connected. It is worth mentioning that, the back of the junction box 20 is also provided with a pair of elongated slots 201 for the bus bar 10 to be inserted into the box, and the elongated slots 201 are respectively close to the housing 21 The left and right side walls 25 of the busbar 10 correspond to the connection part 27 of the plate terminal 22 so as to facilitate the connection of the bus bar 10 to the connection part 27 through the slot 201 .

In summary, the utility model changes the connection mode of the bus bar 10 and the junction box 20, that is, the straight bus bar 10 is connected from the left and right sides of the junction box 20, and the pre-distributed plate shape in the junction box 20 is used. The terminals 22 are correspondingly connected, avoiding the use of the L-shaped bus bar 10 and problems such as poor welding and abnormal connection caused by it.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. within the spirit and principles of the present utility model shall include Within the protection scope of the utility model.

Claims (10)

1. A photovoltaic module, comprising a battery string, a bus bar connected to the battery string and a junction box connected to the bus bar, characterized in that the bus bar is linear, one end of which is connected to the battery string, and the other end Enter the junction box from the left and right sides of the junction box along the length direction of the bus bar. 2. The photovoltaic module according to claim 1, wherein the junction box includes a housing, terminals and diodes installed in the housing, the housing is provided with a left side wall and a right side wall, and the terminals It has a connection part adjacent to the left side wall and the right side wall and a main body extending from the connection part to the center of the casing. 3. The photovoltaic module according to claim 2, wherein the wiring part is located on the outside of the main body, and the wiring part is in two rows, which are respectively connected to the left side wall and the right side wall of the casing. neighbor settings. 4 . The photovoltaic module according to claim 3 , wherein the number of the terminals is four, which are distributed in a U shape. 5. The photovoltaic module according to claim 4, wherein the number of the diodes is less than the number of the terminals, the diodes are provided with a base and mounting feet extending from the base, and each diode is installed The direction of extension of the feet is different. 6 . The photovoltaic module according to claim 5 , wherein the number of the diodes is three, and the extension directions of the mounting legs of the three diodes together form a U-shape. 6 . 7 . The photovoltaic module according to claim 6 , wherein the bottom of the junction box is provided with a pair of slots corresponding to the two rows of connection parts, so that the bus bars enter the box from the bottom of the junction box. 8 . 8 . The photovoltaic module according to claim 7 , wherein the slots are elongated, and are arranged adjacent to the left side wall and the right side wall of the housing respectively. 9. The photovoltaic module according to claim 8, wherein the bus bars comprise a pair of long bus bars and a pair of short bus bars, and the pair of short bus bars are located inside the long bus bars and connected to the long bus bars. The bus bars are arranged in parallel. 10. The photovoltaic module according to claim 9, wherein among the terminals distributed in a U shape, the terminals at the first and last positions are also provided with outlet parts, and the outlet parts, connection parts and the main body are integrally connected , the outlet portion is disposed adjacent to the connection portion, and the extension direction of the outlet portion is parallel to the length direction of the long bus bar.