CN217508705U - Junction box and photovoltaic module - Google Patents

Abstract

The utility model provides a terminal box and photovoltaic module belongs to photovoltaic module owner material technical field. The junction box comprises a box body and a diode; the box body is provided with an accommodating cavity, and the diode is vertically arranged in the accommodating cavity; the diode is including the public head of diode and the female head of diode of mutually supporting, and the public head of diode can be dismantled with the female head of diode and be connected. By vertically arranging the diodes in the box body, on one hand, the box body volume of the junction box can be reduced, and the shielding on the back of the double-sided component is reduced, so that the lighting area and the power generation efficiency of the component are favorably improved; on the other hand, the effective heat dissipation area of the diode can be increased, so that the heat dissipation performance is improved, and the heat dissipation requirement that a high-power assembly and a high-flow junction box generate high heat can be met. Through adopting the public first form of partial shipment of diode with the female head of diode, can avoid the risk that the diode chip that leads to because of the welding is punctureed and loses efficacy.

Description

Junction box and photovoltaic module

Technical Field

The utility model relates to a photovoltaic module owner material technical field particularly, relates to a terminal box and photovoltaic module.

Background

The photovoltaic junction box not only has the functions of connecting the photovoltaic assembly and the load, leading out the current generated by the assembly and generating power, but also provides help for protecting the leading-out wire of the assembly and preventing the hot spot effect, and is an essential ring in a photovoltaic system.

At present, high-power components are in a trend, particularly under the background that double-sided components occupy larger market shares gradually, the size of a junction box is required to be smaller and smaller, but the bearable current is required to be larger and larger, specifically, from the original 20A and 25A, the current is upgraded to 28A and 30A which are required to meet the requirement of 210 battery plates, the problem of high heat emission caused by small box bodies and high current is solved, if the high-power components cannot be effectively handled, the junction box is failed slightly, and potential safety hazards such as fire disasters are caused seriously.

To avoid the above problems, the methods adopted at present are roughly as follows:

firstly, the heat-conducting property of the pouring sealant in the junction box is improved, so that the heat dissipation performance of the whole junction box is improved, and the failure risk is reduced, but the method is limited by the material performance of the pouring sealant, and is embodied in that the high heat-conducting property is limited, and the heat dissipation performance requirement of an assembly with increasing current is difficult to meet;

secondly, form the corrugated surface at box body base lateral wall to at the structural cavity district that forms of box body, with the inside radiating efficiency that promotes, but this mode exists the problem that increases the terminal box volume or increase the production and processing degree of difficulty because of the structure is complicated.

In view of this, the utility model is especially provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a terminal box and photovoltaic module, it can solve above-mentioned technical problem.

The utility model discloses can realize like this:

in a first aspect, the present invention provides a junction box, which includes a box body and a diode;

the box body is provided with an accommodating cavity, and the diode is vertically arranged in the accommodating cavity;

the diode is including the public head of diode and the female head of diode of mutually supporting, and the public head of diode can be dismantled with the female head of diode and be connected.

In an optional embodiment, a chip is arranged inside the diode male head, an insertion head which extends outwards is arranged on one side of the diode male head, an insertion hole is arranged on one side of the diode female head, which is used for being connected with the diode male head, and the insertion head is matched with the insertion hole.

In an optional embodiment, two sides of the diode female head in the width direction are respectively connected with a first copper sheet and a second copper sheet;

the plug-in head includes parallel arrangement's first plug-in head and second plug-in head, and the jack includes first jack and second jack, and first plug-in head cooperatees with first jack and is connected with first copper sheet, and the second plug-in head cooperatees with the second jack and is connected with the second copper sheet.

In an alternative embodiment, the first copper sheet has first bus bar holes and first lands disposed at intervals, and the second copper sheet has second bus bar holes and second lands disposed at intervals.

In an optional embodiment, a first connection hole is formed in one side, away from the diode male head, of the diode female head, and a diode base used for being matched with the first connection hole is formed in the bottom of the box body;

the first copper sheet is provided with a second connecting hole, and the second copper sheet is provided with a third connecting hole; the bottom of the box body is further provided with a first copper sheet base and a second copper sheet base, the first copper sheet base is used for being matched with the second connecting hole, and the second copper sheet base is used for being matched with the third connecting hole.

In an optional embodiment, the bottom of the box body is further provided with a hollow-out area, and at least part of the hollow-out area is located in an area formed by the diode base, the first copper sheet base and the second copper sheet base in a surrounding mode.

In an alternative embodiment, the junction box further has a box cover, which is detachably connected to the box body.

In an optional embodiment, at least one side edge of the box cover is provided with a groove for communicating the accommodating cavity with the outside.

In a second aspect, the present invention provides a photovoltaic module, which includes 2 junction boxes as in any one of the previous embodiments, wherein a cable connector port is provided on the first copper sheet or the second copper sheet of each junction box, wherein the cable connector port of 1 junction box is used for connecting with the positive cable of the photovoltaic cell panel, and the cable connector port of the other 1 junction box is used for connecting with the negative cable of the photovoltaic cell panel.

In an alternative embodiment, the photovoltaic module further includes a 3 rd junction box according to any one of the preceding embodiments, the 3 rd junction box is disposed in the middle of the remaining 2 junction boxes, and the 3 junction boxes may form a current loop together.

The beneficial effects of the utility model include:

the diode is vertically arranged in the box body, so that the box body volume of the junction box can be reduced, and the shielding on the back surface of the double-sided component is reduced, thereby being beneficial to improving the lighting area and the power generation efficiency of the component; on the other hand, the effective heat dissipation area of the diode can be increased, so that the heat dissipation performance is improved, and the heat dissipation requirement that a high-power assembly and a high-flow junction box generate high heat can be met.

Through adopting the public first form of partial shipment of diode with the female head of diode, can avoid the risk that the diode chip that leads to because of the welding is punctureed and loses efficacy.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a box body provided by an embodiment of the present invention at a first viewing angle;

fig. 2 is a schematic structural diagram of the diode male connector, the diode female connector, the first copper sheet and the second copper sheet provided by the embodiment of the present invention after being engaged;

FIG. 3 is a schematic structural view of the diode of FIG. 2 after the female contact is mated with a second copper plate;

FIG. 4 is a schematic structural diagram of the diode header of FIG. 2 at a second viewing angle;

FIG. 5 is a schematic structural diagram of the diode male of FIG. 2;

fig. 6 is a schematic structural diagram of the diode female connector, the first copper sheet, and the second copper sheet having the cable connector port according to the embodiment of the present invention after being engaged with each other;

FIG. 7 is a schematic structural diagram of each base in FIG. 1;

fig. 8 is a schematic structural view of the box cover according to an embodiment of the present invention.

Icon: 10-a box body; 12-a diode mount; 13-a first copper sheet mount; 14-a second copper sheet mount; 151-base body; 152-a connecting portion; 16-a hollowed-out area; 21-diode male; 211-insertion head; 212-first insertion head; 213-a second insertion head; 22-diode female head; 221-a jack; 222-a first receptacle; 223-a second receptacle; 224-first connection hole; 31-a first copper sheet; 311-first bus bar hole; 312 — a first weld region; 313-second attachment hole; 32-a second copper sheet; 321-a second busbar aperture; 322-a second weld region; 323-third connection hole; 33-cable connector port; 40-a box cover; 41-groove.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that, if the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are usually placed when used, it is only for convenience of description and simplification of the present invention, and it is not intended to indicate or suggest that the indicated device or element must have a specific direction, be constructed and operated in a specific direction, and therefore, it should not be understood as a limitation of the present invention. Furthermore, the appearances of the terms "first," "second," "third," and the like, if any, are only used to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not require that the components be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted 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.

Example 1

Referring to fig. 1, the present embodiment provides a junction box, which includes a box body 10 and a diode.

The cross-sectional shape of the box 10 may be rectangular, for example, and four side walls of the box 10 jointly enclose a receiving cavity with a certain height. In addition, the cross-sectional shape of the case 10 may be other than rectangular, such as circular or oval.

The diodes are vertically arranged in the box body 10, that is, the diodes are vertically arranged in the accommodating cavity, and it can be understood that: the diode is arranged along the height direction of the box body by taking the placing direction of the box body as the standard in the using state.

The "vertical arrangement" includes both vertical arrangement and arrangement with a slight inclination angle (e.g. not more than 5 °) from the vertical direction, and preferably vertical arrangement.

Taking the form of vertical installation as an example, on one hand, the problem that the prior art adopts the diode horizontal installation to cause the occupation of the larger volume of the junction box is solved, and therefore the effect of reducing the volume of the junction box body 10 is achieved. Specifically, the diode mounted horizontally in the prior art occupies about 1.5-3cm of the bottom area of the case 10 ² The area of the bottom of the box 10 occupied by the diodes in the vertical mounting form provided by the embodiment is only 0.5-1.2cm ² Compared with the prior art, the volume of the box body 10 can be saved by 2-40%.

On the other hand, the diode horizontally mounted at the bottom of the box body 10 has a larger area and cannot be wrapped by the potting adhesive, but the embodiment adopts a vertical mounting mode, so that the area of the diode wrapped by the potting adhesive is greatly increased, and since the heat conductivity coefficient of air is 0.026W/(m · K), the heat conductivity coefficient of common potting adhesive is 0.3W/(m · K), the higher the heat conductivity coefficient is, the better the corresponding heat conductivity is, and therefore, the larger the area of the diode wrapped by the potting adhesive is, the better the heat dissipation performance of the corresponding diode is.

In addition, the form that this embodiment adopted perpendicular installation can shorten the distance between diode and the box top greatly (because the flow direction of steam is ascending, the diode is more nearly from the box top, and its radiating efficiency that has is higher), and then makes the effective heat radiating area increase of diode, has improved the problem that the radiating area of original diode installation ubiquitous is little, obtains better radiating effect.

On the one hand, the volume of the box body 10 of the junction box can be reduced and the shielding of the back of the double-sided component is reduced by adopting the mode that the diode is vertically arranged in the box body 10, so that the lighting area and the power generation efficiency of the component are favorably improved; on the other hand, the effective heat dissipation area of the diode can be increased, so that the heat dissipation performance is improved, and the heat dissipation requirement that a high-power assembly and a high-flow junction box generate high heat can be met.

As shown in fig. 2 to 6, the diode includes a male diode head 21 and a female diode head 22, which are engaged with each other, and the male diode head 21 is detachably connected to the female diode head 22.

By adopting the form of split charging of the diode male head 21 and the diode female head 22, the risk of failure caused by breakdown of the diode chip caused by welding can be avoided, the problem that the diode chip is broken down caused by overhigh welding temperature and position deviation of the existing diode is solved, and the effect of improving the welding yield of the junction box is further achieved.

Specifically, a chip (not shown) is disposed inside the diode male head 21, as shown in fig. 2 and 5, an insertion head 211 (the insertion head 211 may be made of copper) is disposed on one side of the diode male head 21, as shown in fig. 3 and 6, an insertion hole 221 is disposed on one side of the diode female head 22 for connecting with the diode male head 21, and the insertion head 211 and the insertion hole 221 are engaged with each other.

In some embodiments, the main body portion (which may be made of resin) of the diode male head 21 and the main body portion (which may be made of resin) of the diode female head 22 may be rectangular parallelepiped. The insertion hole 221 is provided on the upper surface of the body of the female diode 22, the insertion head 211 is provided on the lower surface of the body of the male diode 21, and the insertion hole 221 may have an elongated shape, based on the vertical direction in the use state (the same applies below).

Further, as shown in fig. 2, 3 and 6, a first copper sheet 31 and a second copper sheet 32 are respectively connected to both sides (which may be understood as "left side" and "right side") of the diode female header 22 in the width direction.

As can be seen, the first copper sheet 31 and the second copper sheet 32 can both be rectangular, and the length direction of the first copper sheet 31 and the length direction of the second copper sheet 32 can both be perpendicular to the length direction of the diode female header 22. The first copper sheet 31 and the second copper sheet 32 are in the same horizontal plane.

Accordingly, referring to fig. 5 and 6, the insertion head 211 comprises a first insertion head 212 and a second insertion head 213 arranged in parallel, the insertion hole 221 comprises a first insertion hole 222 and a second insertion hole 223, the first insertion head 212 is matched with the first insertion hole 222 and connected with the first copper sheet 31, and the second insertion head 213 is matched with the second insertion hole 223 and connected with the second copper sheet 32.

Further, as shown in fig. 2, 3 and 6, the first copper sheet 31 has first bus bar holes 311 and first lands 312 arranged at intervals, and the second copper sheet 32 has second bus bar holes 321 and second lands 322 arranged at intervals.

The first land 312 is located on a side of the first bus bar hole 311 away from the diode busbar 22 (i.e., on the left side of the first bus bar hole 311), and the second land 322 is located on a side of the second bus bar hole 321 away from the diode busbar (i.e., on the right side of the second bus bar hole).

For example, the extending direction of the first bus bar hole 311 and the extending direction of the second bus bar hole 321 may be parallel to the length direction of the female diode 22.

The first land 312 and the second land 322 are used for soldering to improve the connection strength of the bus bar and the diode assembly.

Further, as shown in fig. 4, a side (which can be understood as a back side or a bottom) of the diode female head 22 facing away from the diode male head 21 is connected to the bottom of the case 10. Specifically, one side of the diode female head 22 departing from the diode male head 21 is provided with a first connection hole 224, and the bottom of the box body 10 is provided with a diode base 12 for matching with the first connection hole 224.

The number of the first connection holes 224 may be 2 as an example, but it is not excluded that the number may be 1, 3 or more. The number of the first connection holes 224 is preferably 2 in consideration of the complexity of the structure and the cost. The 2 first connection holes 224 are spaced apart from each other in the longitudinal direction of the diode female head 22, and preferably are respectively disposed at positions close to both ends of the diode female head 22 in the longitudinal direction.

Further, the first copper sheet 31 is provided with a second connection hole 313, and the second copper sheet 32 is provided with a third connection hole 323; the bottom of the box body 10 is further provided with a first copper sheet base 13 and a second copper sheet base 14, wherein the first copper sheet base 13 is used for matching with the second connecting hole 313, and the second copper sheet base 14 is used for matching with the third connecting hole 323.

Referring to fig. 2, 3 and 6, the number of the second connection holes 313 may be 1, 2, 3, 4 or more, and in order to improve the connection stability between the first copper sheet 31 and the box body 10, the number of the second connection holes 313 is preferably 4, and the 4 second connection holes 313 are respectively located at four corners of the first copper sheet 31.

Similarly, the number of the third connection holes 323 may also be 1, 2, 3, 4 or more, and in order to improve the connection stability between the second copper sheet 32 and the box body 10, the number of the third connection holes 323 is also preferably 4, and the 4 third connection holes 323 are respectively located at four corners of the second copper sheet 32.

Taking fig. 6 as an example, the 2 second connection holes 313 corresponding to the upper left corner and the upper right corner of the first copper sheet 31 are collinear with the 2 third connection holes 323 corresponding to the upper left corner and the upper right corner of the second copper sheet 32. The 2 second connection holes 313 corresponding to the lower left corner and the lower right corner of the first copper sheet 31 are collinear with the 2 third connection holes 323 corresponding to the lower left corner and the lower right corner of the second copper sheet 32.

The hole center connecting lines of the 2 second connecting holes 313 corresponding to the upper left corner and the lower left corner of the first copper sheet 31, the hole center connecting lines of the 2 second connecting holes 313 corresponding to the upper right corner and the lower right corner of the first copper sheet 31, the hole center connecting lines of the 2 third connecting holes 323 corresponding to the upper left corner and the lower left corner of the second copper sheet 32, and the hole center connecting lines of the 2 third connecting holes 323 corresponding to the upper right corner and the lower right corner of the second copper sheet 32 are all parallel to the hole center connecting lines of the 2 first connecting holes 224 arranged on the diode female head 22.

Illustratively, as shown in fig. 7, each of the first copper sheet base 13, the second copper sheet base 14 and the diode base 12 independently includes a base body 151 and a connection portion 152 connected to an upper surface of the base body 151, wherein the base body 151 is fixed to the bottom of the case 10, and the connection portion 152 is configured to pass through the first connection hole 224, the second connection hole 313 or the third connection hole 323 and be connected to the diode female header 22, the first copper sheet 31 or the second copper sheet 32.

In this embodiment, as shown in fig. 1, the bottom of the box 10 further has a hollow area 16 for pouring the potting adhesive, and at least a portion of the hollow area 16 is located in an area enclosed by the diode base 12, the first copper base 13, and the second copper base 14.

Preferably, the hollow-out area 16 is an area enclosed by the diode base 12, the first copper sheet base 13, and the second copper sheet base 14, so as to have a maximum heat dissipation area.

In some embodiments, the hollow area 16 may have a rectangular shape, and in other embodiments, the hollow area 16 may have an oval shape, a circular shape, or the like.

In addition, as shown in fig. 8, the junction box further has a box cover 40, and the box cover 40 is detachably connected to the box body 10.

After packaging, the box cover 40 is located above the diode male head 21 and away from the diode female head 22.

In some preferred embodiments, at least one side edge of the box cover 40 is opened with a groove 41 for communicating the accommodating cavity with the outside to provide a heat dissipation channel. Preferably, each edge of the box cover 40 is formed with a groove 41 to improve a heat dissipation effect.

It should be noted that, in the present embodiment, a part of the structure and the connection manner that are not described in detail can refer to the related prior art, and are not described in detail herein.

Example 2

The present embodiment provides a photovoltaic module (not shown in the drawings), which includes 2 junction boxes provided in embodiment 1, and a cable connector port 33 is provided on the first copper sheet 31 or the second copper sheet 32 of each junction box, where the cable connector port 33 of 1 junction box is used for connecting with a positive cable of a photovoltaic cell panel, and the cable connector port 33 of the other 1 junction box is used for connecting with a negative cable of the photovoltaic cell panel.

For convenience of understanding, the 2 junction boxes are referred to as a "positive box" and a "negative box", where the positive box is used for connecting with a positive cable of the photovoltaic cell panel, and the negative box is used for connecting with a negative cable of the photovoltaic cell panel.

Further, the photovoltaic module may further include the junction box (hereinafter, referred to as "middle box") provided in embodiment 3, the 3 rd junction box is disposed in the middle of the remaining 2 junction boxes, and the 3 junction boxes may together form a current loop. That is, the middle box body is arranged between the positive box body and the negative box body, and the positive box body, the middle box body and the negative box body can be connected with other components in series to form a current loop.

It should be noted that, in the present embodiment, the detailed structure and connection manner of the parts that are not described in detail can refer to the related prior art, and are not described in detail herein.

Example 3

This embodiment provides a mounting method of the photovoltaic module of embodiment 2, for example, refer to the following steps:

step 1, according to a preset position, installing 4 first copper sheet bases 13, 4 second copper sheet bases 14 and 2 diode bases 12 at the bottom of a box body 10, wherein a rectangular area formed by enclosing the 10 bases is used as a hollow area 16; the method can increase the filling space of the pouring sealant and improve the heat dissipation capacity of the junction box;

step 2, connecting the diode female head 22 with the first copper sheet 31 and the second copper sheet 32 into a whole, arranging 2 first connection holes 224 on the back of the diode female head 22, respectively arranging 1 second connection hole 313 at 4 corners of the first copper sheet 31, and respectively arranging 1 third connection hole 323 at 4 corners of the second copper sheet 32;

the first connection holes 224 are matched with the diode bases 12 one by one, the second connection holes 313 are matched with the first copper sheet bases 13 one by one, and the third connection holes 323 are matched with the second copper sheet bases 14 one by one, so that the whole copper sheet system can be erected in the box body 10;

and step 3, arranging a first bus bar hole 311, a second bus bar hole 321, a first welding area 312 and a second welding area 322. Connecting a cable connecting head port 33 on a first copper sheet 31 of the positive box body with a positive cable of the photovoltaic cell panel except the middle box body, and connecting a cable connecting head port 33 on a second copper sheet 32 of the negative box body with a negative cable of the photovoltaic cell panel;

the first copper sheet 31, the second copper sheet 32 and the diode female head 22 are jointly installed in an accommodating cavity of the box body 10 and are erected on the first copper sheet base 13, the second copper sheet base 14 and the diode base 12 to form a semi-finished junction box;

step 4, correspondingly penetrating the bus bars led out of the photovoltaic cell panel through the first bus bar holes 311 and the second bus bar holes 321 of the semi-finished junction box in the step 3, fixing the bottom of the junction box by using sealant, and welding soldering tin on a copper sheet by using a welding machine so as to install the semi-finished junction box on the back of the assembly;

step 5, correspondingly inserting the first plug-in head 212 and the second plug-in head 213 of the male diode into the first jack 222 and the second jack 223 of the female diode 22 respectively to form a complete diode loop; the first insertion head 212 and the second insertion head 213 are correspondingly connected with the positive pole and the negative pole of the bus bar copper sheet, and the chip is positioned in the main body part of the diode male head;

step 6, pouring a pouring sealant into the box body 10, wherein the sealant submerges the top of the diode to play an insulation protection role, and after the pouring sealant is solidified, the diode can be prevented from being loosened abnormally by the diode female head 22 and the diode male head 21 due to external force, so that the diode is further protected;

and 7, after the surface of the pouring sealant is dried and solidified, covering the box cover 40, thereby completing the complete installation of the junction box.

To sum up, the utility model provides a terminal box has also promoted the heat dispersion of terminal box when having reduced box body 10 volumes, and it shelters from the area little, and heat dispersion is good, can satisfy photovoltaic module (especially two-sided subassembly) production requirement that power is higher and higher under the big background nowadays.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A junction box is characterized by comprising a box body and a diode;

the box body is provided with an accommodating cavity, and the diode is vertically arranged in the accommodating cavity;

the diode is including the public head of diode and the female head of diode of mutually supporting, the public head of diode with the female head of diode can be dismantled and be connected.

2. The junction box of claim 1, wherein a chip is disposed inside the diode male head, an insertion head extending outward is disposed on one side of the diode male head, an insertion hole is disposed on one side of the diode female head for connecting with the diode male head, and the insertion head and the insertion hole are matched with each other.

3. The junction box of claim 2, wherein a first copper sheet and a second copper sheet are respectively connected to two sides of the diode female head in the width direction;

the inserting head comprises a first inserting head and a second inserting head which are arranged in parallel, the inserting holes comprise a first inserting hole and a second inserting hole, the first inserting head is matched with the first inserting hole and connected with the first copper sheet, and the second inserting head is matched with the second inserting hole and connected with the second copper sheet.

4. The junction box of claim 3, wherein said first copper sheet has first bus bar holes and first lands disposed in spaced relation, and said second copper sheet has second bus bar holes and second lands disposed in spaced relation.

5. The junction box according to claim 3 or 4, wherein a first connection hole is formed in one side of the diode female head, which is far away from the diode male head, and a diode base matched with the first connection hole is formed in the bottom of the box body;

the first copper sheet is provided with a second connecting hole, and the second copper sheet is provided with a third connecting hole; the box body is characterized in that a first copper sheet base and a second copper sheet base are further arranged at the bottom of the box body, the first copper sheet base is used for being matched with the second connecting hole, and the second copper sheet base is used for being matched with the third connecting hole.

6. The junction box of claim 5, wherein a hollowed-out area is further formed in the bottom of the box body, and at least part of the hollowed-out area is located in an area formed by the diode base, the first copper sheet base and the second copper sheet base in a combined mode.

7. The junction box of claim 1, further comprising a cover removably coupled to the box body.

8. The junction box of claim 7, wherein at least one side edge of the box cover is provided with a groove for communicating the accommodating cavity with the outside.

9. A photovoltaic module, comprising 2 junction boxes according to any one of claims 1 to 8, wherein the first copper sheet or the second copper sheet of each junction box is provided with a cable connector port, wherein 1 cable connector port of the junction box is used for connecting with a positive cable of a photovoltaic cell panel, and the other 1 cable connector port of the junction box is used for connecting with a negative cable of the photovoltaic cell panel.

10. The pv module according to claim 9 further comprising a 3 rd junction box according to any of claims 1-8, wherein the 3 rd junction box is disposed in the middle of the remaining 2 junction boxes, and the 3 junction boxes together form a current loop.

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