CN208190595U

CN208190595U - A kind of photovoltaic junction box of high heat dispersion

Info

Publication number: CN208190595U
Application number: CN201820313751.2U
Authority: CN
Inventors: 张士永
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-03-08
Filing date: 2018-03-08
Publication date: 2018-12-04
Anticipated expiration: 2028-03-08

Abstract

The utility model discloses a kind of photovoltaic junction boxes of high heat dispersion, including pedestal, upper cover and cooling fin, the plastic casing of pedestal studs with the cooling fin of aluminum, the lower end of cooling fin is provided with rectangular Schottky diode, and surface interval 0.5mm of the cooling fin from Schottky diode, Schottky diode is welded on connecting terminal, connecting terminal is fixed by bottom plate, the two sides and bottom end of pedestal are provided with ventilation opening, keep product diode hot zone not direct and photovoltaic cell component backplane, it among it can be with ventilation and heat, cooling fin is studded with also by the front of photovoltaic junction box base housing, the surface temperature of tray interior Schottky diode quickly can be rejected heat to outside by cooling fin, it radiates while by the front to photovoltaic junction box with the back side, the delivery efficiency of effective guarantee photovoltaic cell and Service life, while can also promote the service life of the intracorporal diode of photovoltaic junction box.

Description

A kind of photovoltaic junction box of high heat dispersion

Technical field

The utility model relates to a kind of photovoltaic junction box technical field, in particular to the photovoltaic wiring of a kind of high heat dispersion Box.

Background technique

Photovoltaic solar power generation is a kind of inexhaustible；Nexhaustible clean energy resource.Because of its safety, clean, environmental protection And it is increasingly narrowed by the blueness of people.Photovoltaic industry becomes the rising industry competitively chased of the whole world, China increasingly More enterprises is added in this industry, and China has become the third-largest photovoltaic manufacture base in the whole world, is only second to Japan, moral State.Meanwhile the development of solar energy related components industry is also promoted, such as photovoltaic terminal box, photovoltaic connector, control Device, inverter, battery etc..An important component of the photovoltaic terminal box as solar cell module.(photovoltaic connects The composition of wire box is that diode is welded on copper tip, is drawn with two cables with positive and negative connector.With outside plastics Shell carries out assembly encapsulation, when assembly copper tip in box body is in parallel with cell piece be welded after cavity diode part filled Conduction heat sealable glue carries out waterproof.Because the unilateal conduction characteristic of diode makes when solar panel has individual single battery piece spottiness Diode just forms series circuit and carries out conducting electric current output.) its effect be solar battery Founder bypass protection and light The main composition part that the series connection of volt solar panel exports electric current.It is simultaneously also between rechargeable solar battery and control device Attachment device.It is that a collection electrically cross-cutting comprehensive is set with what structure design, Machine Design were combined with material science Product is assembled in the combination of meter.The combination connection scheme of solar panel is provided for user.With photovoltaic cell technology not Disconnected innovation, transfer efficiency is higher and higher, and cell piece is increasing.The power of photovoltaic cell is being continuously improved.From initial 60W mono- Road rises to 380W till now.So also higher and higher to photovoltaic junction box performance requirement.The carrying current capacity of photovoltaic junction box 15A till now is risen to by original mono- tunnel 6A.

One most important core component of photovoltaic junction box is exactly the diode of the inside, and most popular at present is Xiao Te Its characteristic of based diode is that stability is good；Long service life.The inside chip material of Schottky diode is a kind of semiconductor silicon Material plays the reversed obstructed effect (generally also having 0.55mA leakage current) of the pole P-N unilateal conduction after special processing.? Leakage current is 0.55mA at 25 DEG C of Ta room temperature, and leakage current is 50mA when Ta100 is spent.It can be seen that leakage current can rise when temperature liter doubles 10 times high, will result in short circuit when leakage current infinity makes battery failure connected in parallel.Diodes inside terminal box is constantly in Long-term work state has the excessively high risk burnt of temperature！Another source of temperature is of Schottky diode itself, because of two poles Managing material itself is that semiconductor material because being that semiconductor just has internal resistance has internal resistance just to have fever naturally.It can be seen that Xiao The fever source of special based diode is the chip of itself, thus in the design of the structure of terminal box how the temperature of diode Degree is quickly scattered to exterior space, is one of an important factor for designer will consider.Schottky diode chip temperature passes through Package casing (PBT) epoxy resin --- thermally conductive casting glue --- plastic casing of diode, this three parts are to constitute diode to dissipate The main path of heat.

Currently on the market photovoltaic junction box be mainly to pass through above three parts to carry out heat diffusions.Photovoltaic connects It is connected between wire box and photovoltaic battery panel, is to be bonded in photovoltaic after the dorsal edge of photovoltaic junction box being stamped a circle silica gel special Four busbar aperture positions of solar panel.Then the busbar on photovoltaic battery panel is welded with box body internal wiring terminal.(make Diode and every 20 photovoltaic cells form a parallel circuit) then the upper conduction heat sealable glue of filling in photovoltaic junction box body Waterproof is carried out, is closed the lid after cured.The box body heat dissipation of this terminal box is slow, and box body can pass through maximum amount electric current 15A, box Body internal temperature is very high, reaches 190 degree or so close to the specification requirement upper limit；And the bottom of photovoltaic junction box is flat Directly and the fitting of photovoltaic battery panel is that the bottom heat radiation of photovoltaic junction box must be caused worse in this way, and diode lower end heat is poly- Collection.If aggregation temperature is too high to will lead to the deformation of product plastic part, while excessive temperature can be transmitted to bonded place's backboard The photovoltaic cell on piece of front influences the delivery efficiency and service life of photovoltaic cell herein.

Summary of the invention

The utility model proposes a kind of photovoltaic junction boxes of high heat dispersion, solve photovoltaic wiring in the prior art Box heat dissipation is slow, easily leads to product plastic deformation, leak short circuit, influences the delivery efficiency of photovoltaic cell and asking for service life Topic.

In order to solve the above-mentioned technical problem, the utility model provides the following technical solution:

A kind of photovoltaic junction box of high heat dispersion of the utility model, including pedestal, upper cover, cooling fin, diode, wiring Terminal, bottom plate, pressing block, the cooling fin of the assembly aluminum of the base housing, the Diode facets temperature for product hot zone Rapid cooling is spent, the lower end of the cooling fin is provided with Schottky diode, and table of the cooling fin from Schottky diode Face interval 0.5mm is as the seal clearance for filling conduction heat sealable glue, and Schottky diode is welded on connecting terminal, what is be welded Connecting terminal link rib mounted in bottom plate be cold-pressed fixations after thrusting, and is fastened after fixed with pedestal, is understood after fastening connecing Line terminals are separated into the area Liang Ge and encapsulating area and convergent belt welding section, and encapsulating area product bottom base panel, which is equipped with, fills conduction heat sealable glue Encapsulating mouth, the Schottky diode that is welded of inside setting, at the same product in design structure being welded with Schottky diode Encapsulating area raises part vacantly, and the two sides and bottom end of pedestal are provided with ventilation opening, make product diode hot zone it is not direct with Photovoltaic cell component backplane, there are gaps to be connected separately with ventilation and heat, the two sides of the connecting terminal among it Positive male plug and cathode female plug, and ultrasonic fusing is carried out by pressing block and is fixed, the upper cover waits for that terminal box pastes photovoltaic After on battery component, reflux tape welding, which connects, to be filled after sealant dries, and is buckled in the positive front of pedestal.

As a kind of optimal technical scheme of the utility model, the cooling fin is combined with base housing, is dissipated by aluminium Backing quickly transmits the Schottky diode surface temperature inside photovoltaic junction box, rejects heat in outside air.

It is described in structure design aspect as a kind of optimal technical scheme of the utility model, photovoltaic junction box The part of Schottky diode hot zone is vacantly raised, make box body paste photovoltaic cell component after hot zone part be not directly with Cell module back veneer contact, intermediate there are gaps, while being provided with ventilation port on the housing side both sides of pedestal and lower part, need box External shell superficial air circulation in body hot zone increases product baseboard material surface radiating.

As a kind of optimal technical scheme of the utility model, the cooling fin and pedestal assembly are solid using hole post cold pressing It is fixed.

As a kind of optimal technical scheme of the utility model, the fin pitch is from second level pipe surface 0.5MM, as filling Anti- water space when conduction heat sealable glue, having kept product existing, waterproof effect has rapid cooling effect.

The utility model beneficial effect achieved is: 1: the photovoltaic junction box of the high heat dispersion of the utility model passes through Cooling fin is studded in the front of photovoltaic junction box, can be improved the quick heat radiating capability of photovoltaic junction box.Promoting box body can pass through Rated current to 25A, make tray interior temperature in controlled range, 2: being made two in photovoltaic junction box body by structure design It raises vacantly pole pipe hot zone part.After pasting photovoltaic cell component backboard in actual use in this way, make the fever of terminal box Area part and photovoltaic cell component backboard are separated there are gap, while bottom and side are provided with air vents and carry out air circulation Heat dissipation, the delivery efficiency and service life of effective guarantee photovoltaic cell.The intracorporal diode of photovoltaic junction box is also promoted simultaneously Performance it is stable and prolong the service life.

Detailed description of the invention

Attached drawing is used to provide a further understanding of the present invention, and constitutes part of specification, practical with this Novel embodiment is used to explain the utility model together, does not constitute limitations of the present invention, in the accompanying drawings:

Fig. 1 is positive structure schematic after a kind of assembling of the photovoltaic junction box of high heat dispersion of the utility model；

Fig. 2 is structure schematic diagram after a kind of assembling of the photovoltaic junction box of high heat dispersion of the utility model；

Fig. 3 is a kind of box portion explosive view of the photovoltaic junction box of high heat dispersion of the utility model；

Fig. 4 is a kind of Product Assembly flow chart of the photovoltaic junction box of high heat dispersion of the utility model；

Fig. 5 is that a kind of front cooling fin of the photovoltaic junction box of high heat dispersion of the utility model and back side ventilation opening radiate Schematic diagram；

In figure: 1, pedestal；2, upper cover；3, cooling fin；4, Schottky diode；5, connecting terminal；6, bottom plate；7, it presses Block；8, ventilation opening；9, fixed mounting hole；10, positive male plug；11, cathode male plug.

Specific embodiment

It is illustrated below in conjunction with preferred embodiment of the attached drawing to the utility model, it should be understood that.It is described herein excellent It selects embodiment to be only used for describing and explaining the present invention, is not used to limit the utility model.

Embodiment 1

As shown in Figs. 1-5, the utility model provides a kind of photovoltaic junction box of high heat dispersion, including pedestal 1, upper cover 2 With cooling fin 3, the back of bottom plate 6 is provided with round glue filling opening 12, and the front of pedestal 1 studs with the cooling fin 3 of aluminum, cooling fin 3 Lower end be provided with Schottky diode 4, and surface interval 0.5mm of the cooling fin 3 from Schottky diode 4 is as filling thermally conductive close The seal clearance of sealing, the lower end of Schottky diode 4 are welded with connecting terminal 5, connecting terminal 5 and Schottky diode patch Connecting bar is thrust after welding, fixation is then cold-pressed by bottom plate 6, the two sides of connecting terminal 5 are connected separately with anode Male plug 10 and cathode female plug 11, and ultrasonic wave is carried out by pressing block 7 and is locked, pedestal 1 is internally provided with Schottky two Pole pipe, Schottky diode is chambers are individually isolated in the pre- encapsulating part of box body hot zone, by making light to product structure design Hanging ventilation and heat is raised in volt terminal box hot zone part, and the two sides and bottom end of pedestal 1 are provided with ventilation opening 8, and upper cover 2 is arranged In the positive front of pedestal 1.

Pedestal 1 and 2 pressing block 7 of upper cover are all made of plastic material uvioresistant, anti-aging combustion-supporting UL94, can be 110 DEG C of heatproof.

6 materials'use plastic cement nylon of bottom plate adds 15% glass fibre, and material uvioresistant, anti-aging combustion-supporting UL94 being capable of heatproofs 125℃。

Connecting terminal 5 is fixed by cold pressing mode and bottom plate 6.

Connecting terminal is divided into the area Liang Ge, i.e. encapsulating area and welding section after the good low plate of cold-pressing assembly and pedestal are fastened, It raises the hot zone of product according to the structure design characteristic of bottom plate 6 and pedestal 1, forms air flowing heat dissipation, pedestal 1 Two sides and bottom end are provided with ventilation opening 8.

The two sides of cooling fin 3 are provided with fixed mounting hole 9, with pedestal cold-pressing assembly, send out for box body Xiao Te diode The temperature of hot-zone transmits heat dissipation.

Specifically, in use, the hot melt of cooling fin 3 is fixed on pedestal 1 by the fixed mounting hole 9 on cooling fin 3, so SMT patch is carried out with three Schottky diodes 4 and connecting terminal 5 afterwards, three Schottky diodes 4 are placed on connecting terminal 5 On fixation position welded with tin cream patch after junction rib washed out, the component thrust be cold-pressed with bottom plate 6 and is consolidated Both sides are riveted over positive and negative anodes plug external member after fixed respectively, is then assembled again with the pedestal 1 with cooling fin 3, when assembly, so that Cooling fin 3 is maintained at 0.5mm at a distance from Schottky diode 4, and two leading-out terminals of the product assembled are pressed with plastics Block 7 carries out ultrasonic fusing and fixes.After assembly, sealant pouring and sealing is carried out by round glue filling opening 12, for filling conduction heat sealable Glue carries out waterproof；When photovoltaic circuit, which works, generates heat, the aluminum thermal fin 3 that photovoltaic junction box front studs with can speed up scattered Heat, the rated power that can promote photovoltaic junction box reaches 25A, and the hot zone due to Schottky diode 4 is with bottom plate 6 It raises vacantly, while bottom side is provided with air vents 8 and radiates, and can significantly improve its radiating efficiency, Excessive temperature will not be transmitted on photovoltaic cell component backboard, the delivery efficiency of effective guarantee photovoltaic cell and use the longevity Life.

The photovoltaic junction box of the high heat dispersion of the utility model studs with cooling fin, energy by the front in photovoltaic junction box It enough improves the quick heat radiating capability of photovoltaic junction box, promote the passable rated current of box body to 25A, tray interior temperature is made to exist In controlled range.Diode hot zone part is raised vacantly in box body, pastes photovoltaic cell component in actual use in this way After backboard, separating the hot zone part of terminal box and photovoltaic cell component backboard, there are gaps, while bottom and side are provided with Air vents carry out air circulation heat dissipation, while excessive temperature will not be transmitted on photovoltaic cell component backboard, effectively Ensure the delivery efficiency and service life of photovoltaic cell.The performance for also promoting the intracorporal diode of photovoltaic junction box simultaneously is stablized With prolong the service life.

Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention, it is not limited to this Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art For, it is still possible to modify the technical solutions described in the foregoing embodiments, or to part of technical characteristic It is equivalently replaced.Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on, It should be included within the scope of protection of this utility model.

Claims

1. a kind of photovoltaic junction box of high heat dispersion, including pedestal (1), upper cover (2), cooling fin (3) Schottky diode (4), connecting terminal (5), bottom plate (6), pressing block (7), which is characterized in that the encapsulating area of the pedestal (1) studs with dissipating for aluminum The lower end of backing (3), the cooling fin (3) is provided with Schottky diode (4), and the cooling fin (3) is from two pole of Schottky The surface interval 0.5mm of (4) is managed as the seal clearance for filling thermally conductive marine glue, the lower end setting of the Schottky diode (4) Have connecting terminal (5), the connecting terminal (5) by bottom plate (6) be cold-pressed fixations after thrusting, and is cold-pressed after fixation and pedestal (1) it fastens, connecting terminal is divided into the area Liang Ge and encapsulating area and welding section after assembling fastening, encapsulating area is internally provided with Xiao Special based diode, and the Schottky diode heating part in encapsulating area being raised vacantly in design structure, make product hot zone with There are gaps can carry out air circulation heat dissipation between photovoltaic cell component backboard, and the two sides and bottom end of the pedestal (1) are all provided with It is equipped with ventilation opening (8), the back of bottom plate (6) is provided with round glue filling opening (12), and the two sides of the connecting terminal (5) are separately connected Have a positive male plug (10) and cathode female plug (11), and carry out ultrasonic fusing by pressing block (7) and fix, the upper cover (2) to Battery component reflux tape welding fills the positive front that pedestal (1) is buckled in after sealant is done after connecting.

2. a kind of photovoltaic junction box of high heat dispersion according to claim 1, which is characterized in that the pedestal (1) and Upper cover (2) pressing block (7) is all made of plastic material uvioresistant, anti-aging combustion-supporting UL94, can be 110 DEG C of heatproof.

3. a kind of photovoltaic junction box of high heat dispersion according to claim 1, which is characterized in that bottom plate (6) material Material adds 15% glass fibre using plastic cement nylon, and material uvioresistant, anti-aging combustion-supporting UL94 can be 125 DEG C of heatproof.

4. a kind of photovoltaic junction box of high heat dispersion according to claim 3, which is characterized in that the connecting terminal (5) it is fixed by way of cold pressing with bottom plate (6).

5. a kind of photovoltaic junction box of high heat dispersion according to claim 4, which is characterized in that cold-pressing assembly is good Connecting terminal is divided into the area Liang Ge, i.e. encapsulating area and welding section after low plate and pedestal fastening, according to bottom plate (6) and pedestal (1) Structure design characteristic, the hot zone of product is raised, forms air flowing heat dissipation, the two sides and bottom end of the pedestal (1) are equal It is provided with ventilation opening (8).

6. a kind of photovoltaic junction box of high heat dispersion according to claim 1, which is characterized in that the cooling fin (3) Two sides be provided with fixed mounting hole (9), with pedestal cold-pressing assembly, the temperature for box body Xiao Te diode hot zone is transmitted Heat dissipation.