Longitudinal solar double-glass split type junction box

Abstract

The utility model discloses a longitudinal solar double-glass split type junction box, which comprises a cathode junction box, a plurality of middle junction boxes and an anode junction box, and is characterized in that the cathode junction box, the middle junction boxes and the anode junction box respectively comprise a box body, a conductive part arranged in the box body and a box cover covering the box body; a partition plate is arranged in the box body, and two groove holes are formed in the positions, located on the two sides of the partition plate, of the bottom of the box body respectively. The conductive part comprises two conductive sheets fixed in the box body side by side and a diode connected between the two conductive sheets, the two conductive sheets are both provided with bus bar welding parts extending towards the same side, and the bus bar welding parts on the two conductive sheets are located on the two sides of the partition plate respectively; and the bus bar welding parts on each conducting strip are respectively positioned between the two slotted holes on the corresponding side. The junction box can be suitable for installation of bus bars with different center distances, and the applicability of the junction box is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic component equipment, in particular to a longitudinal solar double-glass split junction box. Background Art

[0002] The solar double-glass cell module includes a glass layer on the front, a packaging material layer in the middle and a glass layer on the back. The double-sided solar double-wave module is increasingly used in solar power stations due to its advantages in double-sided power generation.

[0003] The junction box is an important component in photovoltaic modules. Its function is to lead the current generated by the photovoltaic cell string and realize the connection between the cell strings. The junction box usually has a built-in bypass diode, which plays a shunt role when some cells fail, avoids the hot spot effect and protects the photovoltaic module.

[0004] Chinese utility model patent CN213072568U discloses a three-part photovoltaic junction box, including a left junction box, a middle junction box and a right junction box. The left junction box, the middle junction box and the right junction box all include a box body, a box cover and a conductive component installed in the corresponding box body; each conductive component includes a first conductive terminal, a diode packaging module and a second conductive terminal, and the end of the first conductive terminal or the second conductive terminal is provided with a cable riveting portion.

[0005] The above-mentioned photovoltaic junction box is provided with a first slot hole for the busbar to pass through on the first conductive terminal near the insulating plastic package, and a second slot hole for the busbar to pass through is provided on the second conductive terminal near the insulating plastic package. The junction box cannot adapt to the installation of busbars with different center distances and has poor applicability. Utility Model Content

[0006] In view of the defects in the prior art, the utility model provides a longitudinal solar double-glass split junction box, which is suitable for the installation of busbars with different center distances, thereby improving the applicability of the junction box.

[0007] The utility model provides a longitudinal solar double-glass split junction box, including a negative junction box, a plurality of intermediate junction boxes and a positive junction box, wherein the negative junction box, the intermediate junction box and the positive junction box all include a box body, a conductive component installed in the box body and a box cover arranged on the box body;

[0008] A partition is provided in the box body, and two slots are provided on both sides of the partition at the bottom of the box body;

[0009] The conductive component includes two conductive sheets fixed side by side in the box body and a diode connected between the two conductive sheets. Both conductive sheets are provided with a busbar welding portion extending to the same side. The busbar welding portions on the two conductive sheets are respectively located on both sides of the partition, and the busbar welding portions on each conductive sheet are respectively located between the two slots on the corresponding side.

[0010] Furthermore, the conductive sheet is provided with a plurality of mounting holes, the box body is provided with a plurality of heat-melting posts, and the conductive sheet is fixed in the shell body by the heat-melting posts passing through the mounting holes.

[0011] Furthermore, the conductive sheets on both sides of the diode are symmetrical.

[0012] Furthermore, a wire outlet is provided on a side of the box body of the negative electrode junction box and the positive electrode junction box away from the welding portion of the busbar, and the cable extends into the box body through the wire outlet to be connected with the conductive sheet.

[0013] Furthermore, the cable and the conductive sheet are welded by resistance welding.

[0014] Furthermore, a bayonet is provided on the lower side of the outlet portion of the negative electrode junction box and the positive electrode junction box, and the cable passes through the bayonet and is fixed in the bayonet by a press buckle.

[0015] Furthermore, the buckle and the wire outlet are fixed by ultrasonic welding.

[0016] Furthermore, baffles for error correction testing are provided in the box bodies of the negative electrode junction box and the positive electrode junction box.

[0017] The beneficial effects of the utility model are embodied in:

[0018] One junction box of the present application corresponds to two busbars, and the number of junction boxes can be determined according to the number of busbars in the double-glass module. The installation and wiring are very flexible and suitable for double-glass modules with any number of battery strings. Since the bottom of the box body is located on both sides of the partition with two slots on each side, the busbar welding parts on each conductive sheet are respectively located between the two slots on the corresponding sides. Each busbar can be selected to pass through the slot on the left or right side of the corresponding busbar welding part into the box body, and then welded to the corresponding busbar welding part. This can be suitable for the installation of busbars with different center distances, thereby improving the applicability of the junction box. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0020] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the box body of the utility model embodiment;

[0022] Figure 3 It is a schematic structural diagram of the conductive component of the box body of the utility model embodiment.

[0023] In the attached drawings, 100-negative terminal box; 200-intermediate terminal box; 300-positive terminal box; 410-box body; 411-partition; 412-slot; 413-hot melt column; 414-baffle; 420-conductive component; 421-conductive sheet; 422-diode; 423-mounting hole; 424-busbar welding part; 430-box cover; 440-outlet part; 441-bayonet; 442-press buckle; 450-cable. DETAILED DESCRIPTION

[0024] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0025] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0026] like Figure 1-Figure 3 As shown, an embodiment of the utility model provides a longitudinal solar double-glass split junction box, including a negative junction box 100, a plurality of middle junction boxes 200 and a positive junction box 300.

[0027] The negative electrode junction box 100 , the intermediate junction box 200 and the positive electrode junction box 300 all include a box body 410 , a conductive component 420 installed in the box body 410 , and a box cover 430 covering the box body 410 , and the box cover 430 plays a protective role.

[0028] A partition 411 is provided in the box body 410, and two slots 412 are provided at the bottom of the box body 410 on both sides of the partition 411. The conductive component 420 includes two conductive sheets 421 fixed side by side in the box body 410 and a diode 422 connected between the two conductive sheets 421. The two conductive sheets 421 are provided with a busbar welding portion 424 extending to the same side, and the busbar welding portions 424 on the two conductive sheets 421 are respectively located on both sides of the partition 411, and the busbar welding portions 424 on each conductive sheet 421 are respectively located between the two slots 412 on the corresponding side.

[0029] One junction box of the present application corresponds to two busbars, and the number of junction boxes can be determined according to the number of busbars in the double-glass module. The installation and wiring are very flexible and suitable for double-glass modules with any number of battery strings. Since the bottom of the box body 410 is located on both sides of the partition 411, two slots 412 are provided on each side, and the busbar welding part 424 on each conductive sheet 421 is located between the two slots 412 on the corresponding side, each busbar can be selected to pass through the box body 410 from the slot 412 on the left or right side of the corresponding busbar welding part 424, and then welded to the corresponding busbar welding part 424, which can be suitable for the installation of busbars with different center distances, thereby improving the applicability of the junction box.

[0030] In order to facilitate fixing the conductive sheet 421 in the box body 410, a plurality of mounting holes 423 are provided on the conductive sheet 421, a plurality of hot melt posts 413 are provided in the box body 410, and the conductive sheet 421 is fixed in the shell through the hot melt posts 413 passing through the mounting holes 423. The conductive sheets 421 are evenly distributed in the center of the box body 410, and the conductive sheets 421 on the left and right sides are symmetrical after the diodes 422 are welded to the conductive sheets 421, so that the diodes 422 are evenly heated during operation, effectively reducing the overall temperature rise of the junction box.

[0031] An outlet portion 440 is provided on the side of the box body 410 of the negative terminal box 100 and the positive terminal box 300 away from the busbar welding portion 424. The cable 450 extends into the box body 410 through the outlet portion 440 and is connected to the conductive sheet 421. The cable 450 of the junction box adopts a vertical outlet method, and the volume of the box body 410 is relatively small. At the same time, the cable 450 and the conductive sheet 421 of the traditional junction box are riveted, while the cable 450 and the conductive sheet 421 of the present application are welded by resistance welding, which shortens the overall length of the junction box compared with before and saves costs.

[0032] In order to facilitate the fixation of the cable 450, a bayonet 441 is provided on the lower side of the outlet portion 440 of the negative terminal box 100 and the positive terminal box 300. The cable 450 passes through the bayonet 441 and is fixed in the bayonet 441 by a buckle 442. The buckle 442 and the outlet portion 440 can be fixed by ultrasonic welding.

[0033] In addition, a baffle 414 for error correction test is provided in the box body 410 of the negative electrode terminal box 100 and the positive electrode terminal box 300 .

[0034] When installing the junction box of this embodiment, silicone is applied to the bottom of the junction box and bonded to the solar panel. The busbar is inserted into the box body 410 through the slot 412 at the bottom, and the busbar is welded to the busbar welding part 424 of the corresponding conductive sheet 421. Then the upper cover is covered and it can be used.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A longitudinal solar double-glass split junction box, comprising a negative junction box, a plurality of intermediate junction boxes and a positive junction box, wherein the negative junction box, the intermediate junction box and the positive junction box each comprise a box body, a conductive component installed in the box body and a box cover provided on the box body, characterized in that: A partition is provided in the box body, and two slots are provided on both sides of the partition at the bottom of the box body; The conductive component includes two conductive sheets fixed side by side in the box body and a diode connected between the two conductive sheets. Both conductive sheets are provided with a busbar welding portion extending to the same side. The busbar welding portions on the two conductive sheets are respectively located on both sides of the partition, and the busbar welding portions on each conductive sheet are respectively located between the two slots on the corresponding sides.

2. The longitudinal solar double-glass split junction box according to claim 1 is characterized by: The conductive sheet is provided with a plurality of mounting holes, the box body is provided with a plurality of heat-melting posts, and the conductive sheet is fixed in the shell body by the heat-melting posts passing through the mounting holes.

3. The longitudinal solar double-glass split junction box according to claim 1 is characterized by: The conductive sheets on both sides of the diode are symmetrical.

4. The longitudinal solar double-glass split junction box according to claim 1 is characterized by: A wire outlet is provided on the box body of the negative electrode junction box and the positive electrode junction box at a side away from the busbar welding portion, and the cable extends into the box body through the wire outlet to be connected with the conductive sheet.

5. The longitudinal solar double-glass split junction box according to claim 4 is characterized in that: The cable and the conductive sheet are welded by resistance welding.

6. The longitudinal solar double-glass split junction box according to claim 4 is characterized by: A bayonet is provided at the lower side of the outlet portion of the negative electrode junction box and the positive electrode junction box, and the cable passes through the bayonet and is fixed in the bayonet by a press buckle.

7. The longitudinal solar double-glass split junction box according to claim 6 is characterized by: The buckle and the wire outlet are fixed by ultrasonic welding.

8. The longitudinal solar double-glass split junction box according to claim 1 is characterized by: The negative electrode junction box and the positive electrode junction box are provided with baffles for error correction testing.

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