CN115580223A - Photovoltaic junction box and wiring method - Google Patents

Photovoltaic junction box and wiring method Download PDF

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Publication number
CN115580223A
CN115580223A CN202211193895.6A CN202211193895A CN115580223A CN 115580223 A CN115580223 A CN 115580223A CN 202211193895 A CN202211193895 A CN 202211193895A CN 115580223 A CN115580223 A CN 115580223A
Authority
CN
China
Prior art keywords
junction box
photovoltaic junction
notch
bus bar
box
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211193895.6A
Other languages
Chinese (zh)
Inventor
张宋
罗芳燕
林璋
杨福帅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Jinko Solar Co Ltd
Jinko Solar Co Ltd
Original Assignee
Zhejiang Jinko Solar Co Ltd
Jinko Solar Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Jinko Solar Co Ltd, Jinko Solar Co Ltd filed Critical Zhejiang Jinko Solar Co Ltd
Priority to CN202211193895.6A priority Critical patent/CN115580223A/en
Publication of CN115580223A publication Critical patent/CN115580223A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/30—Electrical components
    • H02S40/34—Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/08—Distribution boxes; Connection or junction boxes
    • H02G3/16—Distribution boxes; Connection or junction boxes structurally associated with support for line-connecting terminals within the box
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

Abstract

The invention discloses a photovoltaic junction box and a wiring method, wherein the photovoltaic junction box comprises: the box body is provided with an accommodating space; the conducting plate is accommodated in the accommodating space and comprises a first plate body extending along a first direction; the guide portion is arranged on the box body, a first notch is formed in the box body by the guide portion, and the guide portion is used for guiding the bus bar to extend out of the first notch along the first direction and then to be connected with the first sheet body. Compared with the prior art, the bus bar guiding device has the advantages that the guiding part is arranged to guide the bus bar to extend out of the first notch along the first direction, and then the bus bar is connected with the first sheet body which also extends along the first direction, so that secondary manual pressing is not needed, and the actions of staff are reduced.

Description

Photovoltaic junction box and wiring method
Technical Field
The invention relates to the technical field of photovoltaic junction boxes, in particular to a photovoltaic junction box and a wiring method.
Background
At present, the bus bars in the junction box are in the vertical direction after penetrating out, and the bus bars are pressed to the horizontal direction by manual pressing operation, so that subsequent welding work can be carried out; the operation has many manual actions and great damage to fingers.
Disclosure of Invention
The invention aims to provide a photovoltaic junction box and a wiring method, which are used for solving the technical problems in the prior art, realizing that a bus bar can directly reach a horizontal position after being perforated, avoiding secondary manual pressing and reducing the actions of staff.
The invention provides a photovoltaic junction box, comprising:
the box body is provided with an accommodating space;
the conducting plate is accommodated in the accommodating space and comprises a first plate body extending along a first direction;
the guide portion is arranged on the box body, a first notch is formed in the box body, and the guide portion is used for guiding the bus bar to extend out of the first notch in the first direction and then be connected with the first sheet body.
The photovoltaic junction box as described above, preferably, the guiding portion includes a guiding groove formed on the box body in a recessed manner, an arc-shaped groove surface is formed on an inner groove surface on one side of the guiding groove, and the first notch is opened on an inner groove surface on the other side of the guiding groove.
In the photovoltaic junction box, preferably, the arc-shaped groove surface includes an arc-shaped guide section and a horizontal guide section which are connected with each other, and the horizontal guide section is arranged near the first notch and extends along the first direction.
The photovoltaic junction box is characterized in that the box body is internally provided with two diodes, and the two conducting strips are symmetrically arranged on two opposite sides of the diodes.
In the photovoltaic junction box, preferably, two guiding portions are provided, and the two guiding portions correspond to the two conductive sheets one to one.
The photovoltaic junction box as described above, preferably, the conductive sheet further includes a second sheet body, one end of the second sheet body is connected to the diode, the other end of the second sheet body is connected to the first sheet body, a second notch is formed in the second sheet body, the second notch is arranged corresponding to the first notch, and the bus bar is connected to the first sheet body after passing through the first notch and the second notch in sequence.
A photovoltaic junction box as described above, wherein preferably, the second sheet extends along a second direction, and the second direction intersects perpendicularly with the first direction.
In the photovoltaic junction box, preferably, a tin block is disposed on the first sheet, and the bus bar is connected to the tin block by soldering.
According to the photovoltaic junction box, preferably, a plurality of positioning columns are arranged in the box body, and positioning holes used for forming positioning fit with the positioning columns are formed in the first sheet body.
The application also provides a wiring method of the photovoltaic junction box, which comprises the following steps:
providing a photovoltaic junction box, wherein the photovoltaic junction box is the photovoltaic junction box;
providing a bus bar, and guiding the bus bar to extend out of the first notch along the first direction by using the guide part of the photovoltaic junction box;
a tin block is provided at a junction between the first sheet and the bus bar, thereby soldering the bus bar to the first sheet.
Compared with the prior art, the bus bar is guided to extend out of the first notch along the first direction by arranging the guide part and then is connected with the first sheet body which also extends along the first direction, secondary manual pressing is not needed, and actions of staff are reduced.
Drawings
Fig. 1 is a top view of a photovoltaic junction box according to an embodiment of the present invention;
fig. 2 is a sectional view of a photovoltaic junction box according to an embodiment of the present invention.
Description of reference numerals:
the manufacturing method comprises the following steps of 1-box body, 2-conducting strip, 3-first notch, 4-guiding groove, 5-arc-shaped guiding section, 6-horizontal guiding section, 7-diode, 8-first sheet, 9-second sheet, 10-second notch, 11-tin block and 12-positioning hole.
D1-a first direction, D2-a second direction.
Detailed Description
The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
With the continuous development of the photovoltaic industry, the rapid reduction of cost, the response to the problem of energy shortage in the future and the environmental pollution caused by the traditional fossil energy promote the rapid increase of the application scale of photovoltaic power generation. The solar photovoltaic junction box is used as an important part of a solar cell module, is a connector between a solar cell array formed by the solar cell module and a solar cell charging control device, and is used for connecting the photovoltaic module and a load, leading out current generated by the photovoltaic module and preventing a hot spot effect.
In the prior art, when the junction box is installed on the solar photovoltaic module, the bus bar is connected with the diode wiring terminal of the junction box, and the wiring terminal and the bus bar are welded through tin wires.
The inventor discovers through research that the inside busbar of photovoltaic terminal box is vertical direction after wearing out, needs the manual work to press the operation and presses the busbar to the horizontal direction, just can carry out follow-up weldment work to reduce yields and production efficiency, also caused artifical finger damage easily.
In order to solve the above technical problem, referring to fig. 1 and fig. 2, the present application provides a photovoltaic junction box, including:
the box body 1 is provided with an accommodating space, and in a feasible implementation mode, the box body comprises an upper box body and a lower box body, and the upper box body and the lower box body can be connected in a buckling mode, a bonding mode, a bolt fastener connection mode and the like to form the accommodating space. The shapes of the upper box body and the lower box body can be determined according to actual conditions, and the embodiment of the application is not particularly limited to this. Go up box body and box body sealing connection down, avoid the part in the box body 1 to receive damp performance that influences the photovoltaic terminal box. In order to guarantee the sealing performance of the photovoltaic junction box, the box body 1 is sealed through glue pouring, and the diode 7 and other circuit elements in the box body 1 are wrapped by insulating glue to be isolated from the external environment, so that the circuit elements are prevented from contacting water, and the safety of the photovoltaic junction box is improved.
The conductive plate 2 is accommodated in the accommodating space, and the conductive plate 2 includes a first plate 8 extending along a first direction D1, in a possible embodiment, the first direction D1 is a horizontal direction.
Guide portion, locate on box body 1, first notch 3 has been seted up on box body 1 to guide portion, first notch 3 is linked together with the accommodation space, the interior profile face of first notch 3 suits with the outer profile face of busbar (not shown), first notch 3 is used for supplying the busbar to insert in box body 1, guide portion is used for guiding the busbar to extend first notch 3 back along first direction D1 and is connected with first slice 8, preferably welding mode is connected, with the electric current that the conduction busbar was collected, through the guide of guide portion, the part that the busbar extended into the accommodation space is along first direction D1 extension, the extending direction of busbar is unanimous with the extending direction of first slice 8, thereby need not artifical rewelding after buckling with the busbar, time saving and labor saving, and the yields has been improved.
In the embodiment that the application provides, refer to fig. 2, guide portion is including sunken guide groove 4 that forms on box body 1, be formed with arc groove face on the groove face in one side of guide groove 4, first notch 3 is seted up on the groove face in the opposite side of guide groove 4, arc groove face sets up with first notch 3 along the horizontal direction relatively, before the one end of busbar does not extend into first notch 3, the busbar contacts with arc groove face, through the guide of arc groove face, make the busbar finally extend into first notch 3 with first direction D1 in, thereby need not to bend the busbar again, just can weld with first slice 8.
In the embodiment provided by the present application, the arc-shaped slot surface includes the consecutive arc-shaped guiding section 5 and the horizontal guiding section 6, and the horizontal guiding section 6 is disposed near the first slot 3 and extends along the first direction D1. The profile shape of the arc-shaped guide section 5 is adapted to the profile shape of the bus bar, so that the bus bar is attached to the arc-shaped guide section 5, the horizontal guide section 6 corresponds to the first notch 3, before the bus bar extends into the first notch 3, the bus bar is firstly contacted with the arc-shaped guide section 5, the surface of the arc-shaped guide section 5 can gradually guide the bus bar to change the extending direction, when the bus bar reaches the continuing part of the arc-shaped guide section 5 and the horizontal guide section 6, one end of the bus bar is already basically parallel to the first direction D1, and then the bus bar reaches the first notch 3 through the guide of the horizontal guide section 6, because the first notch 3 is flush with the horizontal guide section 6, after the bus bar extends into the first notch 3, the inner wall surface of the first notch 3 can also be abutted against the bus bar, the tilting of the bus bar is inhibited, and the bus bar extending into the accommodating space is kept in a horizontal state.
In a possible embodiment, the arc-shaped guide section 5 is recessed towards one side of the bottom surface of the box body 1, and the side facing away from the arc-shaped guide section 5 is an arc-shaped guide path of any shape with a plurality of different radii, and the radii of the arc-shaped guide path can be adjusted to accommodate different bus bar types, thereby ensuring that the end of each bus bar will follow the arc-shaped guide path, and the degree of curvature of the bus bar varies with the curvature of the arc-shaped guide path.
In the embodiment provided by the present application, referring to fig. 1 and fig. 2, a diode 7 is disposed in the box body 1, the diode 7 is used for making current flow in a single direction, and preventing external current from flowing into the photovoltaic module to cause damage to the photovoltaic module, the diode 7 may be an axial diode or a module diode, and the structure of the diode 7 may refer to the prior art and is not described herein again. The two conducting strips 2 are symmetrically arranged on two opposite sides of the diode 7, one conducting strip 2 is connected with the positive end of the diode 7, the other conducting strip 2 is connected with the negative end of the diode 7, one end, away from the diode 7, of one conducting strip 2 is connected with a wiring terminal, the wiring terminal is used for leading out current transmitted by a bus bar, and the wiring terminal generally selects copper as a raw material, so that the conducting strip has good conductivity, heat dissipation performance and ductility, and has sufficient mechanical strength.
In the embodiment provided by the present application, two conducting strips 2 are provided, which correspond to the positive and negative electrodes of the diode 7 respectively, and two conducting strips 2 are connected to one bus bar respectively, so that each bus bar can extend into the accommodating space in the first direction D1 to be connected to the first sheet body 8 of the conducting strip 2, the two guiding portions are provided, which correspond to two conducting strips 2 one-to-one, each guiding portion corresponds to one bus bar, in a feasible implementation manner, the first notches 3 of the two guiding portions are respectively disposed at two sides of the diode 7, and the extending directions of the two arc-shaped groove surfaces deviate from each other, so that the extending directions of the two bus bars are opposite, and the usage amount of the conducting strip 2 material can be reduced.
Referring to fig. 2, the conductive plate 2 further includes a second plate 9, one end of the second plate 9 is connected to the diode 7, the other end of the second plate 9 is connected to the first plate 8, a second notch 10 is formed in the second plate 9, the second notch 10 is arranged corresponding to the first notch 3, the bus bar is connected to the first plate 8 after passing through the first notch 3 and the second notch 10 in sequence, because the first notch 3 is parallel to the second notch 10, after the bus bar extends into the second notch 10, the inner wall of the second notch 10 can also abut against the bus bar, tilting of the bus bar is inhibited, and the bus bar extending into the accommodating space is kept in a horizontal state.
An L-shaped structure is formed between the second sheet body 9 and the first sheet body 8, and the conducting strip 2 is directly connected with the diode 7 through the second sheet body 9, so that the number of wires in the photovoltaic junction box is reduced, and further, the contact resistance in the photovoltaic junction box is reduced.
Referring to fig. 2, the second sheet bodies 9 extend along the second direction D2, the second direction D2 is perpendicular to the first direction D1, the conductive sheet 2 is clamped between the two second sheet bodies 9, the diode 7 can directly dissipate heat in the largest area, and the reliability of the product is improved. Meanwhile, the length, the width and the height of the product are all reduced, the use of raw materials is reduced, and the cost of the product is correspondingly reduced.
In the embodiment provided by the present application, the solder block 11 is disposed on the first sheet 8, the bus bar is connected to the solder block 11 by welding, a welding machine can be used for welding, when welding, the solder block 11 is disposed between the first sheet 8 and the bus bar, the solder block 11 on the photovoltaic junction box is heated and melted by a solder joint, so that the melted solder block 11 can be tightly combined with the bus bar, and a good electrical connection is formed between the bus bar and the conductive plate 2, because the bus bar enters the accommodating space along an extending direction (for example, a horizontal direction) parallel to the first sheet 8, the solder block 11 also has a top surface extending horizontally on the first sheet 8, so that the bus bar can be better attached to the first sheet 8, in the prior art, the bus bar is vertically extended into the accommodating space and then bent to be horizontal, so that there is no so tight attachment between the solder block 11 and the surface of the bus bar, which causes a false welding condition, the welding between the bus bar and the conductive plate 2 is insecure, and the photovoltaic assembly efficiency of the junction box is seriously reduced.
Referring to fig. 1, a plurality of positioning columns are disposed in the case 1, and positioning holes 12 for forming positioning fit with the positioning columns are disposed on the first sheet body 8, in a possible embodiment, two positioning holes 12 are disposed on each first sheet body 8, and the positioning holes 12 are located at the corner ends of the first sheet bodies 8 far away from the second sheet body 9, so as to perform positioning and limiting functions, prevent the first sheet bodies 8 from shifting, and influence the connection between the second sheet bodies 9 and the diodes 7, and the positioning holes 12 on the first sheet bodies 8 simultaneously perform fool-proof functions, so as to prevent the positive and negative electrodes of the diodes 7 from being reversely mounted.
Based on the above embodiment, the present application further provides a wiring method of a photovoltaic junction box, including the following steps:
providing a photovoltaic junction box, wherein the photovoltaic junction box is the photovoltaic junction box;
providing a bus bar, and guiding the bus bar to extend out of a first notch 3 along a first direction D1 by using a guide part of the photovoltaic junction box;
a solder bump 11 is provided at the junction between the first sheet 8 and the bus bar, thereby soldering the bus bar to the first sheet 8.
The construction, features and functions of the present invention are described in detail in the embodiments illustrated in the drawings, which are only preferred embodiments of the present invention, but the present invention is not limited by the drawings, and all equivalent embodiments modified or changed according to the idea of the present invention should fall within the protection scope of the present invention without departing from the spirit of the present invention covered by the description and the drawings.

Claims (10)

1. A photovoltaic junction box, comprising:
the box body is provided with an accommodating space;
the conducting plate is accommodated in the accommodating space and comprises a first plate body extending along a first direction;
the guide portion is arranged on the box body, a first notch is formed in the box body, and the guide portion is used for guiding the bus bar to extend out of the first notch in the first direction and then be connected with the first sheet body.
2. The photovoltaic junction box of claim 1, wherein: the guiding part is formed in including sunken guiding groove on the box body, be formed with arc groove face on the inner groove face of one side of guiding groove, first notch is seted up in on the opposite side inner groove face of guiding groove.
3. The photovoltaic junction box of claim 2, wherein: the arc groove surface comprises an arc guide section and a horizontal guide section which are connected with each other, and the horizontal guide section is close to the first notch and extends along the first direction.
4. The photovoltaic junction box of claim 1, wherein: the box body is internally provided with two diodes, and the two conducting plates are symmetrically arranged on two opposite sides of the diodes.
5. The photovoltaic junction box of claim 4, wherein: the guide parts are two, and the two guide parts correspond to the two conducting strips one to one.
6. The photovoltaic junction box of claim 5, wherein: the conducting strip still includes the second lamellar body, the one end of second lamellar body with the diode is connected, the other end of second lamellar body with first lamellar body is connected, the second notch has been seted up on the second lamellar body, the second notch corresponds to first notch sets up, the busbar loops through first notch and behind the second notch with first lamellar body is connected.
7. The photovoltaic junction box of claim 6, wherein: the second sheet extends along a second direction, and the second direction is perpendicular to the first direction.
8. The photovoltaic junction box of claim 1, wherein: and a tin block is arranged on the first sheet body, and the bus bar is connected with the tin block in a welding manner.
9. The photovoltaic junction box of claim 1, wherein: a plurality of positioning columns are arranged in the box body, and positioning holes used for forming positioning matching with the positioning columns are formed in the first sheet body.
10. A wiring method of a photovoltaic junction box is characterized by comprising the following steps:
providing a photovoltaic junction box, wherein the photovoltaic junction box is the photovoltaic junction box in any one of claims 1-9;
providing a bus bar, and guiding the bus bar to extend out of the first notch along the first direction by using the guide part of the photovoltaic junction box;
a solder bump is provided at a connection between the first sheet and the bus bar, thereby soldering the bus bar to the first sheet.
CN202211193895.6A 2022-09-28 2022-09-28 Photovoltaic junction box and wiring method Pending CN115580223A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211193895.6A CN115580223A (en) 2022-09-28 2022-09-28 Photovoltaic junction box and wiring method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211193895.6A CN115580223A (en) 2022-09-28 2022-09-28 Photovoltaic junction box and wiring method

Publications (1)

Publication Number Publication Date
CN115580223A true CN115580223A (en) 2023-01-06

Family

ID=84583003

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211193895.6A Pending CN115580223A (en) 2022-09-28 2022-09-28 Photovoltaic junction box and wiring method

Country Status (1)

Country Link
CN (1) CN115580223A (en)

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