CN211981826U - Resistance welding photovoltaic terminal box - Google Patents

Abstract

The utility model provides a resistance welds photovoltaic terminal box belongs to photovoltaic accessory technical field. The photovoltaic junction box diode connection structure solves the problems that an existing photovoltaic junction box diode connection mode generally adopts riveting or soldering tin connection, electrical connection is not firm, and conductivity is poor. The utility model discloses a casing, the upper cover, upper cover detachably installs on the casing, the casing inboard still is provided with open installation region from top to bottom, be provided with big copper and base in the installation region, big copper detachably installs on the base and the butt base, big copper includes a plurality of little copper that separate mutually, all be equipped with boss and perpendicular flange on every little copper, be equipped with the fluting that is used for installing the pin on the vertical baffle, still be equipped with the stopper that is used for the little copper of butt on the casing, all be equipped with the convergent hole on the little copper, a plurality of little copper pass through the circuit channel of diode formation a intercommunication. The utility model has the advantages of good heat dissipation effect, low manufacturing cost, firm electrical connection and good electrical conductivity.

Description

Resistance welding photovoltaic terminal box

Technical Field

The utility model belongs to the technical field of the photovoltaic accessory, concretely relates to resistance welding photovoltaic terminal box.

Background

With the gradual depletion of traditional energy sources, the development and application of new energy sources, especially solar energy technology, has become a trend. The photovoltaic junction box is a connector between a solar cell array formed by the solar cell modules and the solar charging control device. The power generated by the solar cell module is connected with an external circuit through the junction box, namely, the module outgoing line is connected with an internal circuit of the junction box, and the internal circuit of the junction box is connected with an external circuit. Generally, the electrical connection (including diode connection, cable connection and the like) inside the photovoltaic junction box is mostly riveted, screwed or soldered, so that the electrical connection of the junction box is not firm enough, parts are easy to shake, soldering tin is added, the conductivity is poor, and the heat dissipation is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem that exists among the prior art, provide a resistance welding photovoltaic terminal box that radiating effect is good, low in manufacturing cost, electric connection is firm, electric conductive property is good, material cost is low, electric connection is firm, electric conductive property is good.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme: a resistance welding photovoltaic junction box comprises a shell and an upper cover, and is characterized in that the upper cover is detachably arranged on the shell, the inner side of the shell is also provided with an installation area which is open from top to bottom, a large copper plate and a base are arranged in the installation area, the large copper plate is detachably arranged on the base and abutted against the base, the large copper plate comprises a plurality of small copper plates which are separated from each other, each small copper plate is provided with a boss and a vertical flange, the vertical flange is provided with a slot for installing a pin, the pin of a diode is inserted into the vertical flange of two adjacent small copper plates and is fixed on the bosses of the two adjacent small copper plates in a resistance welding manner, the shell is also provided with a limiting block for abutting against the small copper plates, the small copper plates are provided with junction holes, and the junction holes are arranged between the diodes, and a plurality of small copper plates form a communicated circuit channel through diodes. During installation, the installation area is filled with glue, the junction box is fixed on the photovoltaic panel through the glue capable of conducting heat such as glue, and the bus bars on the photovoltaic panel are inserted into the bus holes, so that the bottom of the junction box is sealed with the surface of the back of the photovoltaic panel; the plurality of diodes are distributed and installed at the edge of the base, and the confluence holes are positioned among the diodes, so that heat generated by each diode during working is not gathered together in a large amount, the heat dissipation performance of the photovoltaic heat dissipation box is ensured, the service life of the diode is not reduced due to high heat generation temperature during long-term working, and compared with the traditional mode that the confluence holes are arranged at one side of the diodes, the photovoltaic heat dissipation box can make the shell smaller and play a role in saving materials; the shell abuts against the small copper plate and the base through the limiting block, so that the small copper plate and the base are directly fixed on the photovoltaic panel through glue, namely the copper plate, the base and the shell are separated, and other connection relations except for abutting do not exist between the copper plate and the base, so that the material of the shell is saved, the cost performance is high, and the copper plate and the base have more heat dissipation ways compared with the original closed shell; after the shell is covered by the upper cover, all internal parts are wrapped by the heat-conducting glue, so that the junction box can have certain waterproof performance; the diode in the junction box has the advantages of firmness and better conductivity compared with the traditional diode fixed in modes of tin soldering and the like because the diode is fixed on the small copper plate in a resistance welding mode, and the junction box has the advantages of no need of metal filling, high production efficiency, small deformation of a welding piece and easiness in automation.

Furthermore, the boss is provided with an installation groove matched with the pin, and the section of the installation groove is U-shaped or semicircular. Before resistance welding, install the pin of diode in the fluting of two adjacent perpendicular flanges earlier, then insert the mounting groove of boss respectively with the pin on diode both sides, it is preferred, the pin can expose in the height of boss 1/3 pin diameter at least, make resistance welding can go on conveniently, the contact surface of boss and pin is more simultaneously, after welding through resistance, the connection between the two is more fixed, thereby it is difficult not hard up to have guaranteed the diode, and perpendicular flange also can link firmly with the pin at resistance welding in-process, make the electric conductive property of little copper and diode better.

Furthermore, wherein two the small copper plate on still be equipped with the socket that is used for connecting the wire, socket cross sectional shape for being equipped with the ring form, socket and small copper plate link firmly through the mode of resistance welding, socket and wire also link firmly through the mode of resistance welding. Processing socket and little copper alone earlier, then being connected socket and little copper through resistance welding's mode, comparing the socket of original open-type and socket and wire riveted structure, the socket of this setting is connected more firmly and electric conductive property is better with between the wire, inserts in the socket as the wire, then links firmly both through resistance welding, has more area of contact between wire and the socket. The conducting performance of the conducting wire and the inserting opening is better, and the connection is firmer.

Furthermore, a folding edge is further arranged at the joint of the socket and the small copper plate, and the folding edge is perpendicular to the plane of the small copper plate and adopts circular arc transition at the folding angle. The setting of hem can increase the area of contact of big or small copper and heat-conducting glue, is favorable to the heat dissipation, but also can increase the joint strength of socket and little copper, and the dog-ear department of hem adopts the circular arc transition also can conveniently process, increases the area of contact of hem and heat-conducting glue simultaneously, also is favorable to the heat dissipation.

Furthermore, the socket is also provided with a platform which is arranged along the length direction of the socket from the end part of the socket, and the length of the platform is shorter than that of the socket. The platform can facilitate the butt joint of the electrode and the jack of the resistance welding, so that the process of the resistance welding is easier.

Furthermore, a buffer groove is further arranged between the inner side face of the shell and the installation area, and a plurality of reinforcing ribs are arranged on the buffer groove. This dashpot can play and observe whether glue fills up the effect of being full of the installation zone, and when glue spills over the dashpot, the installation zone is filled up promptly to glue in the installation zone, and the setting of dashpot can also play the effect of reinforcing terminal box bulk strength in addition, also can hold more air in the dashpot, improves the inside radiating effect of terminal box.

Further, the stopper include canned paragraph and butt section, the canned paragraph be connected with the casing, butt section and canned paragraph link firmly, butt section and canned paragraph between still be equipped with the inclined plane transition, butt section bottom still be equipped with the arch that is used for the little copper of butt. The above-mentioned structure setting of stopper, because bellied certain length that has, still be equipped with the inclined plane transition between fixed section and the butt section for the creepage distance of stopper is longer than the creepage distance of current rectangular form spacing strip, and creepage distance indicates between two electrically conductive spare parts that record along insulating surface, under the in service behavior of difference, because insulating material around the conductor is polarized, leads to insulating material to present electrified phenomenon's electrified district.

Furthermore, little copper on be equipped with a plurality of slots, the base on be equipped with a plurality of plugs, slot and plug cooperation realize dismantling of little copper and base and be connected. Through slot and plug complex connected mode, simple structure, easy dismounting, plug and slot make the cooperation relation of little copper and base inseparabler simultaneously, and the heat transfer effect is better, is favorable to the diode on the base to dispel the heat.

Further, the base on set up a plurality of scarce holes that correspond the convergent hole, scarce hole edge be equipped with the inclined plane, scarce hole evenly set up in base length direction, the base on still be equipped with a plurality of recesses. This scarce hole makes the busbar to insert in the busbar more conveniently because the setting on inclined plane, and the setting of recess also can hold more glues moreover, more is favorable to the base to be fixed on the photovoltaic board.

Further, the base is made of a heat-resistant material. The heat-resistant material is preferably made of high-performance polyamide 46, the polyamide 46 has excellent performance, high melting point, high intermediate strength and bending modulus, small creep resistance, large water absorption, small product size change, excellent chemical resistance and dyeing performance, easy processing and forming and high heat conductivity coefficient, and can quickly conduct the temperature of a small copper plate and a diode to the back area of the photovoltaic panel, the glue is preferably heat-conducting glue, and the heat-conducting glue has excellent moisture resistance, shock resistance, corona resistance, electric leakage resistance and chemical medium resistance. Can be continuously used at-60 to 280 ℃ and keeps the performance. The heat conducting glue does not swell and has good adhesion to most metal and non-metal materials, so that the heat radiating capacity of the diode can be greatly improved by matching the heat conducting glue with a base made of high-performance polyamide 46.

Compared with the prior art, the resistance welding photovoltaic junction box adopting the technical scheme has the following beneficial effects:

the utility model discloses a resistance welds photovoltaic terminal box has that the radiating effect is good, low in manufacturing cost, electrical connection is firm, electric conductive property is good advantage.

Drawings

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

FIG. 2 is another angular schematic view of FIG. 1;

fig. 3 is a schematic view of the internal structure of the present invention;

fig. 4 is a bottom view of the present invention;

FIG. 5 is an enlarged view of the stationary segment;

FIG. 6 is a circuit path schematic;

FIG. 7 is an enlarged view of A in FIG. 1;

fig. 8 is a cross-sectional view of a socket.

In the figure, 1, a housing; 2. an upper cover; 3. an installation area; 4. a large copper plate; 5. a base; 6. a diode; 7. a pin; 8. a limiting block; 9. a slot; 10. a plug; 11. an exhaust port; 12. a circuit path; 13. a boss; 14. vertical flanges; 15. an inclined surface; 16. a groove; 17. folding edges; 18. a fixed section; 19. a connector fixing seat; 20. a small copper plate; 22. mounting grooves; 23. a socket; 24. an abutment section; 25. a protrusion; 26. a platform; 27. reinforcing ribs; 28. a buffer tank; 29. hole deletion; 30. and (4) conducting wires.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1-8, the resistance welding photovoltaic junction box comprises a shell 1 and an upper cover 2, wherein the upper cover 2 is detachably mounted on the shell 1, the inner side of the shell 1 is further provided with a mounting area 3 which is opened up and down, a large copper plate 4 and a base 5 are arranged in the mounting area 3, the large copper plate 4 is detachably mounted on the base 5 and abutted against the base 5, the large copper plate 4 comprises a plurality of small copper plates 20 which are separated from each other, each small copper plate 20 is provided with a boss 13 and a vertical flange 14, the vertical flange 14 is provided with a slot for mounting a pin 7, the pin 7 of a diode 6 is inserted into the vertical flange 14 of two adjacent small copper plates 20 and fixed on the bosses 13 of two adjacent small copper plates 20 in a resistance welding manner, the shell 1 is further provided with a limiting block 8 for abutting against the small copper plates 20, the small copper plates 20 are provided with a junction hole 11, a plurality of small copper plates 20 form a continuous circuit path 12 through the diode 6. During installation, the installation area 3 is filled with glue, the junction box is fixed on the photovoltaic panel through the glue such as glue for heat conduction, and the bus bars on the photovoltaic panel are inserted into the bus holes 11, so that the bottom of the junction box is sealed with the surface of the back of the photovoltaic panel; the plurality of diodes 6 are distributed and installed at the edge of the base 5, and the confluence holes 11 are located among the diodes 6, so that heat generated by each diode 6 during working is not gathered together in a large amount, the arrangement ensures the heat dissipation performance of the photovoltaic heat dissipation box, the service life of the diodes 6 can not be shortened due to heating high temperature during long-term working, and compared with the traditional mode that the confluence holes 11 are arranged at one side of the diodes 6, the shell 1 can be smaller, and the material is saved; the shell 1 abuts against the small copper plate 20 and the base 5 through the limiting block 8, so that the small copper plate 20 and the base 5 are directly fixed on the photovoltaic panel by glue, namely the copper plate, the base 5 and the shell 1 are separated, and other connection relations except for abutting do not exist between the copper plate and the base, so that the material of the shell 1 is saved, the cost performance is high, and the copper plate and the base 5 have more heat dissipation ways compared with the original closed shell 1; after the shell 1 is covered by the upper cover 2, all internal parts are wrapped by the heat-conducting glue, so that the junction box can have certain waterproof performance; because the diode 6 is fixed on the small copper plate 20 in the mode of resistance welding, compared with the traditional diode 6 fixed in the modes of tin soldering and the like, the diode 6 in the junction box has the advantages of firmer performance and better conductivity, because the resistance welding has the advantages of no need of filling metal, high production efficiency, small deformation of a welding piece and easy realization of automation.

Furthermore, the boss 13 is provided with an installation groove 22 matched with the pin 7, and the section of the installation groove 22 is U-shaped or semicircular. Before resistance welding, install pin 7 on diode 6 in the fluting of two adjacent perpendicular flanges 14 earlier, then insert the pin 7 on diode 6 both sides respectively in mounting groove 22 of boss 13, preferably, pin 7 can expose in the height of 13 one third pin 7 diameter of boss at least, make resistance welding can go on conveniently, boss 13 and pin 7's contact surface is more simultaneously, after passing through resistance welding, the connection between the two is more fixed, thereby guaranteed that diode 6 is difficult for becoming flexible, and perpendicular flange 14 also can link firmly at resistance welding in-process with pin 7, make the electric conductivity of little copper 20 and diode 6 better.

Furthermore, the two small copper plates 20 are provided with sockets 23 for connecting the wires 30, the cross sections of the sockets 23 are circular, the sockets 23 are fixedly connected with the small copper plates 20 in a resistance welding manner, and the sockets 23 are fixedly connected with the wires 30 in a resistance welding manner. Firstly, the socket 23 and the small copper plate 20 are processed separately, then the socket 23 and the small copper plate 20 are connected in a resistance welding mode, compared with an original open socket 23 and a structure that the socket 23 is riveted with the lead 30, the socket 23 and the lead 30 are connected more firmly and have better conductivity, when the lead 30 is inserted into the socket 23, the lead 30 and the socket are fixedly connected through resistance welding, and more contact areas are arranged between the lead 30 and the socket 23. The conducting performance of the conducting wire 30 and the inserting opening 23 is better, and the connection is firmer.

Furthermore, a folding edge 17 is further arranged at the joint of the socket 23 and the small copper plate 20, the folding edge 17 is perpendicular to the plane of the small copper plate 20, and the folding angle of the folding edge 17 adopts circular arc transition. Hem 17 set up can increase the area of contact of big or small copper 20 and heat-conducting glue, is favorable to the heat dissipation, but also can increase socket 23 and the joint strength of little copper 20, and hem 17's dog-ear department adopts the circular arc transition also can conveniently process, increases hem 17 and the area of contact of heat-conducting glue simultaneously, also is favorable to the heat dissipation.

Furthermore, the socket 23 is provided with a platform 26 which is arranged along the length direction of the socket 23 from the end part of the socket 23, and the length of the platform 26 is shorter than that of the socket 23. This platform 26 facilitates the abutment of the resistance-welded electrode with the socket 23, making the process of resistance welding easier.

Further, a buffer groove 28 is arranged between the inner side surface of the shell 1 and the mounting area 3, and a plurality of reinforcing ribs 27 are arranged on the buffer groove 28. This dashpot 28 can play and observe whether glue fills the effect of installing zone 3, and when glue spilled over to dashpot 28, installing zone 3 was filled up promptly to glue in the installing zone 3, and the setting of dashpot 28 can also play the effect of reinforcing terminal box bulk strength moreover, also can hold more air in the dashpot 28, improves the inside radiating effect of terminal box.

Further, stopper 8 includes canned paragraph 18 and butt section 24, and canned paragraph 18 is connected with casing 1, and butt section 24 links firmly with canned paragraph 18, still is equipped with the inclined plane transition between butt section 24 and the canned paragraph 18, and butt section 24 bottom still is equipped with the arch 25 that is used for butt copper plate 20. The above-mentioned structure setting of stopper 8, because protruding 25 have certain length, still be equipped with inclined plane 15 transition between fixed segment 18 and the butt section 24 for the creepage distance of stopper 8 is longer than the creepage distance of current rectangular form spacing strip, and creepage distance indicates between two electrically conductive spare parts that record along insulating surface, under the service behavior of difference, because insulating material around the conductor is by the electric polarization, leads to insulating material to present electrified phenomenon's electrified district.

Furthermore, a plurality of slots 9 are arranged on the small copper plate 20, a plurality of plugs 10 are arranged on the base 5, and the slots 9 and the plugs 10 are matched to realize detachable connection of the small copper plate 20 and the base 5. Through slot 9 and plug 10 complex connected mode, simple structure, easy dismounting, plug 10 and slot 9 make the cooperation relation of little copper 20 and base 5 inseparabler simultaneously, and the heat transfer effect is better, is favorable to diode 6 on the base 5 to dispel the heat.

Furthermore, a plurality of holes 29 corresponding to the confluence holes 11 are formed in the base 5, inclined planes 15 are arranged at the edges of the holes 29, the holes 29 are uniformly arranged in the length direction of the base 5, and a plurality of grooves 16 are further formed in the base 5. Due to the arrangement of the inclined surface 15, the bus bar can be more conveniently inserted into the bus hole 11, and the arrangement of the groove 16 can also contain more glue, so that the base 5 can be more favorably fixed on the photovoltaic panel.

Further, the base 5 is made of a heat-resistant material. The heat-resistant material is preferably made of high-performance polyamide 46, the polyamide 46 has excellent performance, high melting point, high intermediate strength and bending modulus, small creep resistance, large water absorption, small product size change, excellent chemical resistance and dyeing performance, easy processing and forming and high heat conductivity coefficient, and can quickly conduct the temperature of the small copper plate 20 and the diode 6 to the back area of the photovoltaic panel, the glue is preferably heat-conducting glue, and the heat-conducting glue has excellent moisture resistance, shock resistance, corona resistance, electric leakage resistance and chemical medium resistance. Can be continuously used at-60 to 280 ℃ and keeps the performance. Does not swell and has good adhesion to most metallic and non-metallic materials, so that the heat-conducting glue combined with the base 5 made of high-performance polyamide 46 can greatly improve the heat-dissipating capacity of the diode 6.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms of the housing 1, the upper cover 2, the mounting area 3, the large copper plate 4, the base 5, the diode 6, the pin 7, the stopper 8, the slot 9, the plug 10, the flow-gathering hole 11, the circuit channel 12, the boss 13, the vertical rib 14, the inclined surface 15, the groove 16, the folded edge 17, the fixing section 18, the connector fixing seat 19, the small copper plate 20, the mounting groove 22, the socket 23, the abutting section 24, the protrusion 25, the platform 26, the reinforcing rib 27, the buffer groove 28, the notch 29, the wire 30, etc. are used more frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims (10)

1. The utility model provides a resistance welding photovoltaic terminal box, includes casing (1), upper cover (2), diode (6), its characterized in that, upper cover (2) detachably install on casing (1), casing (1) inboard still be provided with about open installation region (3), installation region (3) in be provided with big copper (4) and base (5), big copper (4) detachably install on base (5) and butt base (5), big copper (4) including a plurality of little copper (20) of mutual separation, every little copper (20) on all be equipped with boss (13) and perpendicular flange (14), perpendicular flange (14) on be equipped with the fluting that is used for installing pin (7), pin (7) of diode (6) insert perpendicular flange (14) of two adjacent little copper (20) and be fixed in boss (13) of two adjacent little copper (20) through the mode of resistance welding ) On, casing (1) on still be equipped with stopper (8) that are used for butt little copper (20), little copper (20) on all be equipped with collection hole (11), collection hole (11) set up between diode (6), a plurality of little copper (20) form a circuit channel (12) of intercommunication through diode (6).

2. A resistance-welded photovoltaic junction box according to claim 1, characterized in that said boss (13) is provided with an installation groove (22) fitting the pin (7), said installation groove (22) having a U-shaped or semicircular cross-section.

3. A resistance-welded photovoltaic junction box according to claim 1, wherein two of said small copper plates (20) are further provided with a socket (23) for connecting a lead, the cross-sectional shape of said socket (23) is circular, said socket (23) is fixedly connected with said small copper plate (20) by means of resistance welding, and said socket (23) is also fixedly connected with the lead by means of resistance welding.

4. A resistance welding photovoltaic junction box according to claim 3, characterized in that a folded edge (17) is further arranged at the joint of the inserting opening (23) and the small copper plate (20), the folded edge (17) is perpendicular to the plane of the small copper plate (20), and the folded edge (17) adopts an arc transition at the folded angle.

5. A resistance-welded photovoltaic junction box according to claim 4, characterized in that said insertion opening (23) is further provided with a platform (26) extending from the end of said insertion opening (23) along the length of said insertion opening (23), said platform (26) having a length shorter than the length of said insertion opening (23).

6. A resistance-welded photovoltaic junction box according to claim 1, characterized in that a buffer groove (28) is further provided between the inner side surface of the housing (1) and the mounting region (3), and a plurality of reinforcing ribs (27) are provided on the buffer groove (28).

7. An electric resistance welding photovoltaic junction box according to claim 1, characterized in that the limiting block (8) comprises a fixed section (18) and an abutting section (24), the fixed section (18) is connected with the shell (1), the abutting section (24) is fixedly connected with the fixed section (18), an inclined transition is further arranged between the abutting section (24) and the fixed section (18), and a protrusion (25) for abutting against the small copper plate (20) is further arranged at the bottom of the abutting section (24).

8. An electric resistance welding photovoltaic junction box according to claim 1, characterized in that a plurality of slots (9) are arranged on the small copper plate (20), a plurality of plugs (10) are arranged on the base (5), and the slots (9) and the plugs (10) are matched to realize the detachable connection of the small copper plate (20) and the base (5).

9. A resistance welding photovoltaic junction box according to claim 1, characterized in that the base (5) is provided with a plurality of holes (29) corresponding to the convergence holes (11), the edge of each hole (29) is provided with an inclined surface (15), the holes (29) are uniformly arranged in the length direction of the base (5), and the base (5) is further provided with a plurality of grooves (16).

10. A resistance-welded photovoltaic junction box according to any one of claims 1 to 9, characterized in that said base (5) is made of a heat-resistant material.

Images