CN210351084U

CN210351084U - Photovoltaic terminal box with good heat dissipation function

Info

Publication number: CN210351084U
Application number: CN201921646376.4U
Authority: CN
Inventors: 黄群雅
Original assignee: Zhejiang Zhonghuan Saite Photovoltaic Science & Technology Co ltd
Current assignee: Zhejiang Zhonghuan Saite Photovoltaic Science & Technology Co ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-04-17
Anticipated expiration: 2029-09-30

Abstract

A photovoltaic junction box with a good heat dissipation function comprises a box body, a bottom plate and a cover plate, wherein the cover plate is buckled at the upper end of the box body, the bottom plate is buckled at the lower end of the box body, a metal support is arranged in the box body and erected on the bottom plate, a partition support is arranged in the box body, and the partition support divides the metal support into a first partition for connecting a bus bar and a second partition provided with a diode; the first partition is filled with sealant, the second partition is internally provided with a heat conduction sealing plug, the lower end of the heat conduction sealing plug is provided with a groove, the groove is positioned right above the diode, the groove is internally provided with a heat dissipation assembly, the diode is adhered with a solid silicone grease heat dissipation pad, and the solid silicone grease heat dissipation pad is abutted against the heat dissipation assembly. The utility model discloses carry out reasonable subregion with metal support to through added solid-state silicone grease heat dissipation pad, heat conduction sealing plug and radiator unit in the box body, can promote holistic heat-sinking capability, solve the heat dissipation defect of diode, increase the reliability, prolonged life.

Description

Photovoltaic terminal box with good heat dissipation function

Technical Field

The utility model belongs to the technical field of the technique application of photovoltaic spare part and specifically relates to a photovoltaic terminal box with good heat dissipation function.

Background

The solar cell module junction box is a connector between a solar cell array formed by solar cell modules and a solar charging control device, and is a cross-field comprehensive design combining electrical design, mechanical design and material science. The junction box of the solar cell module is very important in the composition of the solar cell module, and mainly plays a role in connecting electric power generated by the solar cell with an external circuit. The junction box is adhered to the back plate of the assembly through silica gel, the outgoing lines in the assembly are connected together through the internal lines in the junction box, and the internal lines are connected with the external cables to enable the assembly to be conducted with the external cables. The diode is arranged in the junction box, so that the component can work normally when being shielded from light.

Among the prior art, the diode in the photovoltaic terminal box generally sets up in the middle part of box body, and the busbar support generally sets up on box body upper portion, has the busbar to introduce the hole at the upper portion fretwork. Introduced from above. When the junction box is arranged on the back of the photovoltaic panel, the position of the junction box just corresponds to the panel, and the bus bar on the panel is led in from the upper part of the box body. Photovoltaic terminal box is at the working process, and the diode in the box body produces the heat, because the diode is located the panel, and the heat can a large amount of gathering in the corresponding position in box body upper portion, will influence the work of panel certainly. In addition, in the existing photovoltaic junction box, the mounting directions of the diodes are consistent, so that the purposes of rapid assembly, simplified production process and manufacturing cost saving are achieved, but the heating of the diodes is mainly concentrated on the main body part, so the heating of the diodes is concentrated due to the mounting directions, the heat dissipation is influenced, and the use effect of the whole photovoltaic junction box is reduced.

In the improvement of the existing photovoltaic junction box on the aspect of heat dissipation, a mode of adjusting the distribution positions of all components is mainly adopted to reduce heat from being gathered at one position; or a plurality of heat dissipation holes are formed to dissipate heat more quickly. Compared with the original junction box, the improvement has the advantages that the sealing performance, the universality of components and the like are greatly influenced, the glue filling amount is large, the heat dissipation capacity is improved, the expected expectation cannot be achieved, the service life of the diode is not improved much, and the later maintenance pressure and cost are still very large.

Disclosure of Invention

In order to overcome the above-mentioned not enough of prior art, the utility model provides a photovoltaic terminal box with good heat dissipation function.

The technical proposal of the utility model for solving the technical problem is that: a photovoltaic junction box with a good heat dissipation function comprises a box body, a bottom plate and a cover plate, wherein the cover plate is buckled at the upper end of the box body, the bottom plate is buckled at the lower end of the box body, a metal support is arranged in the box body and erected on the bottom plate, a partition support is arranged in the box body, and the metal support is divided into a first partition and a second partition, the first partition is used for being connected with a bus bar, and the second partition is provided with a diode by the partition support;

the first partition in the pouring sealed glue, the second partition in be equipped with a heat conduction sealing plug, just the lower extreme of heat conduction sealing plug is seted up flutedly, this recess is located directly over the diode, the recess in be equipped with radiator unit, the diode on paste and have solid-state silicone grease radiating pad, solid-state silicone grease radiating pad with radiator unit butt.

Preferably, the heat dissipation assembly comprises a first thermal contact type aluminum base plate abutted with the solid silicone grease heat dissipation pad, and a tower type heat dissipation fin group arranged on the first thermal contact type aluminum base plate.

Preferably, the tower-type heat dissipation fin group is made of an aluminum material, and the tower-type heat dissipation fin group and the first thermal contact type aluminum bottom plate are integrally formed.

Preferably, the tower-type heat dissipation fin group is in a needle column shape.

Preferably, the heat dissipation assembly comprises a second thermal contact type aluminum base plate abutted to the solid silicone grease heat dissipation pad and a plurality of heat conduction pipes connected to the side wall of the second thermal contact type aluminum base plate, the heat conduction sealing plug is provided with a plurality of heat conduction holes, the heat conduction holes are the same as the grooves, and the heat conduction pipes are inserted into the heat conduction holes.

Preferably, the heat dissipation assembly is further provided with a temperature monitoring module, and the temperature monitoring module is in communication connection with the external control end.

The beneficial effects of the utility model reside in that: 1. the metal support is reasonably partitioned, and the solid-state silicone grease heat dissipation pad, the heat conduction sealing plug and the heat dissipation assembly are added into the box body, so that the overall heat dissipation capability can be greatly improved, the long-term heat dissipation defect of the diode is overcome, the problem of diode failure caused by high temperature is effectively reduced, the overall reliability is improved, and the service life is prolonged; 2. although the initial cost of the photovoltaic junction box is higher, the number of times of later maintenance and replacement can be greatly reduced, and the maintenance cost and the labor cost are reduced, so that the cost after long-term use is lower; 3. due to the arrangement of the heat-conducting sealing plug, the glue filling amount is small, the glue filling difficulty is low, the glue filling cost is reduced, and the whole sealing performance is still good.

Drawings

Fig. 1 is an exploded view of the present invention.

Fig. 2 is a schematic structural diagram of a heat dissipation assembly according to an embodiment.

Fig. 3 is a schematic structural diagram of a heat dissipation assembly according to a second embodiment.

Fig. 4 is a partial structural sectional view in the first embodiment.

Fig. 5 is a partial structural sectional view of the second embodiment.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Example one

Referring to fig. 1, 2 and 4, a photovoltaic junction box with a good heat dissipation function comprises a box body 1, a bottom plate 2 and a cover plate 3, wherein the cover plate 3 is buckled at the upper end of the box body 1, the bottom plate 2 is buckled at the lower end of the box body 1, a metal support 4 is arranged in the box body 1, the metal support 4 is erected on the bottom plate 2, a partition support 5 is arranged in the box body 1, and the partition support 5 divides the metal support 4 into a first partition 6 for connecting a bus bar and a second partition 8 provided with a diode 7;

first subregion 6 in pour into sealed glue, second subregion 8 in be equipped with a heat conduction sealing plug 9, just the lower extreme of heat conduction sealing plug 9 is seted up recess 10, this recess 10 is located directly over diode 7, recess 10 in be equipped with radiator unit 12, diode 7 on paste and have solid-state silicone grease heat dissipation pad 11, solid-state silicone grease heat dissipation pad 11 with radiator unit 12 butt.

Although the photovoltaic junction box is used outdoors, the photovoltaic junction box is fixed on the solar double-light module, so that the position is relatively stable. The utility model discloses in, adopt recess 10 to carry on spacingly to radiator unit 12, the dismouting is very simple, and also comparatively firm reliable during the use.

In this embodiment, the heat dissipation assembly 12 includes a first thermal contact type aluminum base plate 13 abutting against the solid silicone grease heat dissipation pad 11, and a tower type heat dissipation fin group 14 disposed on the first thermal contact type aluminum base plate 13. The structure of the heat dissipation assembly 12 in the embodiment is adopted to form, and the heat dissipation assembly can be in large-area contact with the solid-state silicone grease heat dissipation pad 11 through the arrangement of the first thermal contact type aluminum base plate 13, so that the heat conduction capability is improved, heat generated by the diode 7 is rapidly transferred to the first thermal contact type aluminum base plate 13, the heat dissipation area is further increased through the tower type heat dissipation fin group 14, and the heat dissipation efficiency is improved.

Preferably, the tower-type heat dissipation fin group 14 is made of an aluminum material, and the tower-type heat dissipation fin group 14 and the first thermal contact type aluminum base plate 13 are integrally formed. The tower-type heat dissipation fin group 14 and the first thermal contact type aluminum base plate 13 are of an integrally formed structure, the assembling process is omitted, connection is stable, loosening is avoided, and reliability in use is guaranteed.

Preferably, the tower-type heat dissipation fin group 14 is in a pin column shape. By adopting the pin-column-shaped form, the whole heat dissipation area of the tower-type heat dissipation fin group 14 can be larger, so that the heat dissipation performance is better.

In this embodiment, the heat dissipation assembly 12 is further provided with a temperature monitoring module 15, and the temperature monitoring module 15 is in communication connection with an external control terminal. In the use process, each heat dissipation assembly 12 can not always maintain a normal working state, once a fault occurs, the fault cannot be identified in appearance, the condition of an open circuit can not be found until the diode 7 is burnt, the fault time and the fault point are not fixed, and the integral use is greatly influenced. Through the setting of temperature monitoring module 15, can monitor in real time through external control end, at the beginning of radiator unit 12 or diode 7 trouble emergence, in time discover the problem, carry out the fixed point and discharge and maintain, guarantee whole stable work.

Example two

Referring to fig. 1, 3 and 5, the present embodiment is different from the first embodiment in that: the heat dissipation assembly 12 comprises a second thermal contact type aluminum base plate 16 abutted to the solid-state silicone grease heat dissipation pad 11 and a plurality of heat conduction pipes 17 connected to the side wall of the second thermal contact type aluminum base plate 16, a plurality of heat conduction holes are formed in the heat conduction sealing plug 9, the heat conduction holes are the same as the grooves 10, and the heat conduction pipes 17 are inserted into the heat conduction holes. By the arrangement of the heat conduction pipe 17, the contact area of the heat conduction gasket and the heat dissipation assembly 12 can be increased, so that the generated heat can be dissipated to the outside more quickly. The heat dispersion of this embodiment is better than embodiment one, but the degree of difficulty of production assembly is great, can select according to the demand of self in the in-service use.

The utility model provides a photovoltaic terminal box with good heat dissipation function, it uses working method and function unanimous with current photovoltaic terminal box, no longer gives unnecessary details here one by one. The difference lies in that: the solid-state silicone grease heat dissipation pad 11, the heat conduction sealing plug 9 and the heat dissipation assembly 12 are added into the box body 1, so that the overall heat dissipation capacity can be greatly improved, the long-term heat dissipation defect of the diode 7 is overcome, the problem of the fault of the diode 7 caused by high temperature is effectively reduced, the overall reliability is improved, and the service life is prolonged.

Claims

1. The utility model provides a photovoltaic terminal box with good heat dissipation function, includes box body, bottom plate and apron, the apron lock be in the upper end of box body, the bottom plate lock be in the lower extreme of box body, its characterized in that: a metal support is arranged in the box body, the metal support is erected on the bottom plate, a partition support is arranged in the box body, and the partition support divides the metal support into a first partition used for being connected with a bus bar and a second partition provided with a diode;

2. The photovoltaic junction box with good heat dissipation function of claim 1, wherein: the heat dissipation assembly comprises a first thermal contact type aluminum bottom plate and a tower type heat dissipation fin group, wherein the first thermal contact type aluminum bottom plate is abutted to the solid silicone grease heat dissipation pad, and the tower type heat dissipation fin group is arranged on the first thermal contact type aluminum bottom plate.

3. The photovoltaic junction box with good heat dissipation function of claim 2, wherein: the tower type heat dissipation fin group is made of aluminum materials, and the tower type heat dissipation fin group and the first thermal contact type aluminum bottom plate are integrally formed.

4. The photovoltaic junction box with good heat dissipation function of claim 2, wherein: the tower-type radiating fin group is in a needle column shape.

5. The photovoltaic junction box with good heat dissipation function of claim 1, wherein: the radiating assembly comprises a second thermal contact type aluminum base plate and a plurality of heat conducting pipes, wherein the second thermal contact type aluminum base plate is abutted to the solid silicone grease radiating pad, the heat conducting pipes are connected to the side wall of the second thermal contact type aluminum base plate, a plurality of heat conducting holes are formed in the heat conducting sealing plugs, the heat conducting holes are the same as the grooves, and the heat conducting pipes are inserted into the heat conducting holes.

6. The photovoltaic junction box with good heat dissipation function of any one of claims 1-5, wherein: the heat dissipation assembly is also provided with a temperature monitoring module, and the temperature monitoring module is in communication connection with an external control end.