CN218868195U

CN218868195U - Plug-in box cover of photovoltaic junction box

Info

Publication number: CN218868195U
Application number: CN202223411557.3U
Authority: CN
Inventors: 李前进; 朱第保; 阮岩伟; 龙占海; 施杰; 张真玮
Original assignee: Jiangsu Tonglin Electric Co ltd
Current assignee: Jiangsu Tonglin Electric Co ltd
Priority date: 2022-12-17
Filing date: 2022-12-17
Publication date: 2023-04-14
Anticipated expiration: 2032-12-17

Abstract

Photovoltaic terminal box plug-in lid relates to chip package technical field. The box cover is provided with a connecting part which is detachably and fixedly connected with the box body; a first metal piece, a second metal piece and a chip are arranged in the box cover. The first metal piece is fixedly arranged in the box cover and is provided with a first inserting end extending downwards; the second metal piece and the first metal piece are fixedly arranged in the box cover at intervals and are provided with second inserting ends extending downwards; the chip is arranged on the first metal piece and is connected with the second metal piece through the connecting piece. Be equipped with first grafting end and second grafting end on the lid that possesses the diode function, assemble to the line box of adaptation through the plug mode in, the customer end can realize rapid Assembly. When the photovoltaic line box is out of order at the client, quick replacement can be realized to reduce the use and maintenance cost of the client.

Description

Plug-in box cover of photovoltaic junction box

Technical Field

The utility model relates to a chip package technical field especially relates to photovoltaic terminal box plug-in lid.

Background

With the rapid development of the photovoltaic industry in recent years, the competition of the photovoltaic market is intensified. The silicon wafer specification of the photovoltaic module is changed from 156mm to 182mm to 210 mm. The increase of the specification of the photovoltaic silicon wafer greatly promotes the power generation power of the single-wafer assembly, so that the current of the photovoltaic assembly system is higher and higher, the short-circuit current of the photovoltaic assembly reaches 18.6A or higher at present, the photovoltaic assembly is used as a key accessory of a photovoltaic junction box, and the rapid promotion of the current also puts higher requirements on the performance of the photovoltaic assembly. Meanwhile, the strong competition of the domestic photovoltaic module market and the requirement of the flat price on the internet also put forward a more rigorous requirement on the cost of the photovoltaic junction box. Based on the requirements of cost and electrical property, the diode module is generally adopted in the current market as a protection device of the photovoltaic junction box, so that the size of the photovoltaic junction box and the material BOM cost of the photovoltaic junction box can be greatly reduced. At present, a diode module is directly packaged in a wire box and cannot be detached for maintenance, the heat dissipation performance is poor, and the stability of normal operation is affected by overheating.

SUMMERY OF THE UTILITY MODEL

The utility model provides a to above problem, provide one kind and maintain portably, improve the photovoltaic terminal box plug-in lid of thermal diffusivity.

The technical scheme of the utility model is that: the plug-in box cover of the photovoltaic junction box is provided with a connecting part which is detachably and fixedly connected with the box body; the box cover is internally provided with:

the first metal piece is fixedly arranged in the box cover and is provided with a first inserting end extending downwards;

the second metal piece and the first metal piece are fixedly arranged in the box cover at intervals and are provided with second inserting ends extending downwards; and

and the chip is arranged on the first metal piece and is connected with the second metal piece through a connecting piece.

Specifically, the first metal piece is plate-shaped and is provided with a first hollow part;

the first inserting end is fixedly arranged at the first hollow-out part.

Specifically, a second hollow hole matched with the second metal piece is formed in the first metal piece.

Specifically, the positive electrode side of the chip is connected with the first metal piece, and the negative electrode side of the chip is connected with the second metal piece through the connecting piece.

Specifically, the inner side wall of the box cover is provided with a plurality of positioning parts;

the lateral part of the first metal piece is provided with a plurality of positioning grooves matched with the positioning parts.

Specifically, the top of the box cover is provided with fixedly connected radiating fins.

Specifically, a heat-conducting protective material for filling is arranged in the box cover.

Specifically, a sealing groove is formed in the side part of the box cover;

and a sealing ring matched with the box body is arranged on the sealing groove.

Specifically, the connecting part is a plurality of claws arranged on the box cover.

Specifically, the positive electrode of the chip is connected with the first metal piece, and the negative electrode of the chip is connected with the second metal piece through the connecting piece.

The utility model discloses beneficial effect:

1. the diode function is integrated on the photovoltaic wire box cover based on the chip low-voltage packaging technology, and the heat dissipation structure is arranged on the outer surface of the box cover, so that the box cover large-area heat dissipation sheet of the wire box is favorable for rapid heat dissipation, and higher rated current is realized. The conventional wire box needs to use two 180-mil-size chips to realize the 30A wire box, and the scheme can be used for realizing the 30A wire box by adopting a single 165-mil-size chip. The material cost of the chip can be greatly reduced.

2. Be equipped with the inserted sheet on the lid that possesses the diode function, assemble the line box to the adaptation through the plug mode in, the customer end can realize rapid Assembly. When the photovoltaic line box is out of order at the client, quick replacement can be realized to reduce the use and maintenance cost of the client.

3. Because the diode functional area shifts to the lid region by placing the box body lower part originally, box body part size can reduce by a wide margin, reduces the holistic material cost of line box. Meanwhile, the bus bar is installed by a photovoltaic assembly manufacturer, the loss of the diode function in a tin soldering mode can be avoided, and the production yield of a production line is improved.

Drawings

FIG. 1 is a schematic view of the three-dimensional structure of the utility model and the box body in use,

FIG. 2 is a schematic perspective view of the disassembled state of the first metal member, the second metal member and the box cover,

figure 3 is a perspective view of the assembled state of figure 2,

FIG. 4 is a schematic view of a three-dimensional structure of the box cover when a heat-conducting protective material is filled in the box cover,

figure 5 is a schematic view of the internal structure of the lid,

figure 6 is a schematic perspective view of the disassembled state of the box body,

FIG. 7 is a perspective view of the assembled state of the case;

in the figure 100, the lid of the box is shown,

110 is a first metal piece, 111 is a first plug end,

120 is a second metal piece, 121 is a second mating end,

130 is a chip, 131 is a connection pad,

140 is a heat sink, 150 is a thermally conductive protective material,

200 is a box body of the box body,

210 is a third metal piece, 211 is a first metal plug-in position, 212 is a rectangular hole,

220 is a fourth metal piece, 221 is a second metal plug-in position, 222 is a tin storage tank,

and the reference numeral 230 is a base plate,

241 is an upper press block, 242 is a lower press block,

300 is a cable.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "vertical", "horizontal", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model is shown in figures 1-7; the plug-in type box cover of the photovoltaic junction box is provided with a connecting part which is detachably and fixedly connected with the box body; the box cover 100 is internally provided with:

the first metal piece 110 is fixedly arranged in the box cover 100, and is provided with a first inserting end 111 extending downwards; the first inserting end 111 is chamfered and flattened so as to be beneficial to realizing opposite insertion;

the second metal piece 120 and the first metal piece 110 are fixedly arranged in the box cover 100 at an interval, and a second inserting end 121 extending downwards is arranged; and

and the chip 130 is arranged on the first metal piece 110 and is connected with the second metal piece 120 through a connecting sheet 131.

The preferred structural form of this case box 200 is: the first metal plug-in position 211 is detachably and fixedly connected with the box cover 100 and is matched with the first plug-in end 111, and the second metal plug-in position 221 is matched with the second plug-in end 121.

According to the scheme, the anode and the cathode of the diode functional region, namely the first metal part 110 and the second metal part 120, are manufactured by using metal conductive parts, the Schottky chip 130 is welded to the anode of the conductor, and the upper surface of the Schottky chip 130 and the cathode of the conductive parts are welded by using a high-temperature welding technology through a connecting sheet 131 to form a semi-finished product with the diode function. The semi-finished product with the diode function is assembled in the groove of the box cover 100 and filled with materials such as epoxy resin and silica gel, and heat-conducting aluminum powder and graphene can be added into the filling materials to increase the heat conductivity of the semi-finished product. After the filling process and the curing of the filling material are completed, the functional region of the diode core schottky chip 130 is protected and the connector structure formed by the exposed metal conductive member is exposed.

The metal conductive elements (the first metal element 110 and the second metal element 120) can be made of copper materials of the grades of T2\ H65\ C1920 and the like. The connecting sheet 131 can be made of a material having excellent conductivity, such as copper, gold, silver, or aluminum.

Further preferably, the first metal part 110 is plate-shaped and is provided with a first hollow part;

the first inserting end 111 is fixedly arranged at the first hollow part.

In the present embodiment, the first plugging terminal 111 is manufactured by the following steps: a rectangular cutting line is marked on the first metal piece 110, three sides of the rectangle are cut to form a plate-shaped first plug-in end 111, and the first plug-in end 111 is bent towards the first metal plug-in position 211 through a bending process. In this way, the material usage can be reduced, the connection stability of the first inserting end 111 can be improved, and the connection reliability of the heat-conducting protective material 150 and the first metal member 110 can be improved.

Further, a second hollow hole matched with the second metal part 120 is formed in the first metal part 110, so that the influence on the performance of the device caused by the overhigh local temperature between the second metal part 120 and the first metal part 110 is avoided.

Further, the positive side of the chip 130 is connected to the first metal member 110, and the negative side is connected to the second metal member 120 through the connecting piece 131.

Further preferably, the inner side wall of the box cover 100 is provided with a plurality of positioning parts;

the side of the first metal part 110 is provided with a plurality of positioning grooves adapted to the positioning portions.

Preferably, the top of the box cover 100 is provided with a heat sink 140 fixedly connected thereto, and the heat sink 140 may be made of aluminum, ceramic, or other materials with excellent heat dissipation properties.

Further, a heat-conducting protective material 150 for filling is provided in the box cover 100, and the heat-conducting protective material 150 is epoxy resin glue in the present case.

Preferably, a sealing groove is formed in the side of the box cover 100;

and a sealing ring matched with the box body 200 is arranged on the sealing groove, so that the sealing property of the box cover 100 is improved, and water vapor is prevented from entering.

Further inject, connecting portion are a plurality of jack catchs of setting on lid 100, be equipped with on the box body 200 a plurality of with the draw-in groove of jack catch adaptation, can dismantle fixed connection through the form of buckle between lid 100 and the box body 200.

Further defined, the cartridge 200 includes therein:

the first metal inserting position 211 is arranged on the third metal piece 210; and

and the second metal inserting position 221 is arranged on the fourth metal piece 220. Third metal part 210 and fourth metal part 220 may be made of a metal material having high elasticity, such as beryllium copper.

Further, the third metal piece 210 and the fourth metal piece 220 are respectively in an omega shape.

Further, the third metal piece 210 includes a first connection portion, a U-shaped connection portion, and a second connection portion, which are connected in sequence;

a pair of symmetrically arranged clamping jaws is arranged in the U-shaped connecting portion, and a pair of clamping jaws form a first metal inserting connection position 211.

The jack catch is further optimized, the top of jack catch is the arc structure, and the outside direction in bottom is buckled, and the high-efficient stable plug of the first end of pegging graft 111 of being convenient for improves the security and the stability of connecting.

The jaw is provided with a plurality of spaced seams extending upwards from the bottom to form a plurality of single clamping pieces, so that the reliability of the first inserting end 111 is further improved.

In this case, the fourth metal element 220 has the same structure as the third metal element 210.

Further defined, the box body 200 further comprises a base 230 fixedly connected therewith;

the base 230 is provided with a third installation position adapted to the third metal element 210 and a fourth installation position adapted to the fourth metal element 220.

The third installation position is provided with a plurality of third limiting columns, and the third metal piece 210 is provided with a plurality of third limiting holes matched with the third limiting columns. The third metal piece 210 is pressed into a third limiting column for fixed connection, the diameter of the third limiting column is slightly larger than the diameter of a fixing hole of the metal piece 210, and the third limiting column is clamped in by adopting a matching process to realize fixation.

The fourth mounting position is provided with a plurality of fourth limiting columns, and the fourth metal piece 220 is provided with a plurality of fourth limiting holes matched with the fourth limiting columns.

Further, the end of the box body 200 is provided with an outlet hole;

an upper pressing block 241 fixedly connected with the box body 200 is arranged on the wire outlet hole;

a lower pressing block 242 detachably and fixedly connected with the upper pressing block 241 is arranged below the upper pressing block 241.

Further, the upper pressing block 241 and the lower pressing block 242 are detachably and fixedly connected through a buckle.

Rectangular holes 212 for the bus bars of the photovoltaic module to penetrate and be assembled and welded are respectively arranged on the third metal piece 210 and the fourth metal piece 220.

The end of the third metal piece 210 is provided with a tin storage tank 222 for connecting with the photovoltaic cable 300 by resistance welding.

The use mode of the junction box in the scheme is that three junction boxes are connected as an example:

the first metal part 110 in the first junction box is led out through a confluence belt and is connected with the second metal part 120 in the second junction box, the first metal part 110 in the second junction box is connected with the second metal part 120 in the third junction box, and the second metal part 120 (negative pole) in the first junction box and the first metal part 110 (positive pole) in the third junction box are led out through cables respectively.

Later maintenance cost: when the inside diode breakdown of line box became invalid, conventional line box need be dismantled whole line box, replaced again. Adopt the patent scheme product, only need to change the lid can, than prior art product cost reduction one third, change simple and conveniently moreover, very big reduction the maintenance cost.

Performance advantage situation: the patented scheme can use a smaller number of lower size chips to achieve the same current for the same volume. If 30A rated current line box, need use two 180mil size chips just can realize 30A line box, use this scheme to adopt single 165mil size chip to realize

And under the same volume, the same chip specification is adopted. The heat dissipation capacity of the patent scheme has obvious advantages. 180mil chips are adopted, the maximum junction temperature of the conventional wire box is about 198 ℃ under the rated current of 25A, and the maximum junction temperature of the patented scheme is about 160 ℃, so that the heat dissipation advantage is obvious.

The disclosure of the present application also includes the following points:

(1) The drawings of the embodiments disclosed herein only relate to the structures related to the embodiments disclosed herein, and other structures can refer to general designs;

(2) The embodiments and features of the embodiments disclosed herein can be combined with each other to arrive at new embodiments without conflict;

the above embodiments are only embodiments disclosed in the present disclosure, but the scope of the disclosure is not limited thereto, and the scope of the disclosure should be determined by the scope of the claims.

Claims

1. The plug-in box cover of the photovoltaic junction box is characterized in that a connecting part which is detachably and fixedly connected with the box body is arranged on the box cover; the box cover is internally provided with:

2. The plug-in box cover of the photovoltaic junction box according to claim 1, wherein the first metal piece is plate-shaped and is provided with a first hollow part;

the first inserting end is fixedly arranged at the first hollow-out part.

3. The plug-in box cover of the photovoltaic junction box as claimed in claim 1, wherein a second hollow hole matched with the second metal piece is formed in the first metal piece.

4. The plug-in box cover of the photovoltaic junction box as claimed in claim 1, wherein the positive side of the chip is connected with the first metal piece, and the negative side of the chip is connected with the second metal piece through a connecting piece.

5. The plug-in box cover of a photovoltaic junction box according to claim 1, wherein a plurality of positioning parts are arranged on the inner side wall of the box cover;

6. The plug-in box cover of a photovoltaic junction box as claimed in claim 1 or 5, wherein the top of the box cover is provided with fixedly connected cooling fins.

7. The plug-in box cover of the photovoltaic junction box as claimed in claim 1 or 5, wherein a heat-conducting protective material is filled in the box cover.

8. The plug-in box cover of the photovoltaic junction box according to claim 1 or 5, wherein a sealing groove is formed in the side part of the box cover;

and a sealing ring matched with the box body is arranged on the sealing groove.

9. The plug-in box cover of photovoltaic junction box according to claim 1, wherein the connecting part is a plurality of claws arranged on the box cover.

10. The plug-in box cover of the photovoltaic junction box as claimed in claim 1, wherein the positive electrode of the chip is connected with the first metal piece, and the negative electrode of the chip is connected with the second metal piece through the connecting piece.