Photovoltaic bypass module and photovoltaic junction box with same

Abstract

The utility model discloses a photovoltaic bypass module and a photovoltaic junction box. The photovoltaic bypass module includes an intermediate conductive terminal, a first conductive terminal, a second conductive terminal, a first bypass module diode, and a second bypass module diode, where a first gap formed between the first conductive terminal and the intermediate conductive terminal is utilized. The first conductive terminal and the middle conductive terminal form a first gap, and the second gap formed between the second conductive terminal and the middle conductive terminal form a second gap for the bus bar to pass through respectively, so that the positions of threading holes for the bus bar to pass through are relatively concentrated. The bus bar can directly penetrate into the box to reach the first bonding pad or the middle bonding pad or the second bonding pad, and other operations such as bending are not required to be performed on the bus bar, so that the junction box is more convenient to install, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaics, and in particular to a photovoltaic bypass module and a photovoltaic junction box having the photovoltaic bypass module. Background Art

[0002] Photovoltaic modules are a number of single cells connected in series and parallel, and then packaged to form a whole, making it a device that can convert solar energy into electrical energy. A photovoltaic module usually contains several groups of battery strings. For example, the common three groups, each battery string group contains two battery strings. To prevent the hot spot effect, a photovoltaic junction box will be connected in parallel to each battery string group. When one of the battery strings does not generate electricity due to being blocked or other factors, the bypass diode in the photovoltaic junction box can be forward-conducted to form a path with the front and rear battery strings, thereby ensuring the normal power generation of the remaining battery strings in the photovoltaic module.

[0003] There is a split photovoltaic junction box in the prior art, in which two bypass diodes are arranged in each box body to form a double-core junction box. When used on a photovoltaic module, it is necessary to match the conductive path on the photovoltaic module. On the photovoltaic module, the current of each battery string flows into the busbar through the grid line. When installed, the double-core junction box will be placed on the back of the photovoltaic module, and its position corresponds to the gap between two adjacent battery strings. At the same time, it is necessary to open the position of this gap so that the busbar passes through the back of the photovoltaic module and is connected in parallel with the diode on the same side of the junction box. However, due to the large grid line spacing of some photovoltaic modules during design, this results in that after all the grid lines on a battery string are gathered on the busbar, the space from the first grid line of the next adjacent battery cell is narrow, making the aforementioned gap opening very small, which makes the busbar perforations on both sides of the diode in the junction box farther from the opening on the gap, and the busbar needs to be bent at the bottom of the box body before it can be inserted into the corresponding busbar perforations to complete subsequent welding, which increases the difficulty of the installation process.

[0004] In addition, in the split photovoltaic junction box in the prior art, the two bypass diodes in each box body are axial bypass diodes, and each axial bypass diode is connected in parallel at both ends of a single battery string. When a battery string in any battery string group is blocked or damaged, the bypass diode connected in parallel with it is forward-conducted to form a path with other battery strings. Although this structure increases the effective utilization rate of photovoltaic modules, the overcurrent capacity of the axial bypass diode can only reach about 22A. With the development of existing photovoltaic technology, the demand for high-current and high-heat dissipation products has become increasingly strong. The above structure can no longer meet the needs of high current, and when the above structure is adopted, it is necessary to increase the copper plate area in the box body or the size of the axial diode to improve product performance, which will increase the size of the junction box and increase material costs, making the product lose competitiveness.

[0005] It should be stated that the above background technology content is only used to assist in understanding the inventive concept and technical solution of this patent application. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed before the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of this application. Utility Model Content

[0006] The first object of the utility model is to provide a photovoltaic bypass module to solve one or more problems of the prior art.

[0007] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a photovoltaic bypass module, the photovoltaic bypass module includes a first conductive terminal, an intermediate conductive terminal and a second conductive terminal arranged in sequence along the horizontal direction, the photovoltaic bypass module also includes a first bypass module diode arranged between the first conductive terminal and the intermediate conductive terminal, and a second bypass module diode arranged between the intermediate conductive terminal and the second conductive terminal, wherein a first gap for passing a bus bar is formed between the first conductive terminal and the intermediate conductive terminal, and a second gap for passing a bus bar is formed between the second conductive terminal and the intermediate conductive terminal.

[0008] Preferably, the middle conductive terminal has at least a middle protrusion, on which a middle pad for connecting to a bus bar is disposed; the first conductive terminal has at least a first protrusion, on which a first pad for connecting to a bus bar is disposed; the second conductive terminal has at least a second protrusion, on which a second pad for connecting to a bus bar is disposed;

[0009] The first protrusion and the second protrusion are arranged on two different sides of the middle protrusion, a first gap is formed between the first protrusion and the middle protrusion, and a second gap is formed between the second protrusion and the middle protrusion.

[0010] In some embodiments, the first bypass module diode, the first pad, the first gap, the middle pad, the second gap, the second pad, and the second bypass module diode are sequentially distributed in the same direction.

[0011] In some embodiments, the intermediate conductive terminal further comprises an intermediate main body, a first conductive portion and a second conductive portion, the intermediate protrusion extends from the intermediate main body along a first direction away from the intermediate main body, the first conductive portion and the second conductive portion are arranged on different sides of the intermediate main body along a second direction, wherein the first direction intersects with the second direction;

[0012] The first conductive terminal further includes a first main body portion, and the first protrusion extends away from the first main body portion along the second direction;

[0013] The second conductive terminal further includes a second main body portion, and the second protrusion portion extends away from the second main body portion along the second direction;

[0014] The first bypass module diode is disposed between the first main body and the first conductive part, and the second bypass module diode is disposed between the second main body and the second conductive part.

[0015] In some embodiments, along the first direction, the first protrusion, the middle protrusion, and the second protrusion are located on the same side of the middle main body.

[0016] In some embodiments, a gap is disposed between the first protrusion, the second protrusion, and the middle body portion in the first direction.

[0017] In some embodiments, the first bypass module diode includes a first bypass element, one end of which is electrically connected to the first conductive portion, and the other end of which is electrically connected to the first main body portion through a first jumper; the second bypass module diode includes a second bypass element, one end of which is electrically connected to the second main body portion, and the other end of which is electrically connected to the second conductive portion through a second jumper.

[0018] In some embodiments, the N pole of the first bypass element is electrically connected to the first conductive portion, the P pole of the first bypass element is electrically connected to one end of the first jumper, and the other end of the first jumper is electrically connected to the first conductive terminal to form the first bypass module diode;

[0019] The N pole of the second bypass element is electrically connected to the second conductive terminal, the P pole of the second bypass element is electrically connected to one end of the second jumper, and the other end of the second jumper is electrically connected to the second conductive part to form the second bypass module diode.

[0020] In some embodiments, the intermediate conductive terminal, the first conductive terminal and the second conductive terminal are all conductive plates, the first bypass element and the second bypass element are both chips, a side surface of the first bypass element is in contact with and electrically connected to a surface of the first conductive part, and a side surface of the second bypass element is in contact with and electrically connected to a surface of the second conductive terminal.

[0021] In some embodiments, the first main body includes a first mounting portion and a first connecting portion for electrically connecting to the first jumper, the first mounting portion, the first connecting portion and the first protruding portion are sequentially connected in the second direction, the first bypass module diode also includes a first package, and the first bypass element, the first conductive portion, the first jumper and the first connecting portion are wrapped and fixed by the first package;

[0022] The second main body portion includes a second mounting portion and a second connecting portion for electrically connecting to the second bypass element, the second mounting portion, the second connecting portion and the second protruding portion are sequentially connected in the second direction, the second bypass module diode also includes a second package, and the second bypass element, the second conductive portion, the second jumper and the second connecting portion are wrapped and fixed by the second package.

[0023] In some embodiments, a first waterproof structure is disposed on the surface of the first conductive terminal, and the first waterproof structure has two groups and is disposed on two different sides of the first connecting portion in the second direction; and / or a second waterproof structure is disposed on the surface of the second conductive terminal, and the second waterproof structure has two groups and is disposed on two different sides of the second connecting portion in the second direction;

[0024] Among them, the first waterproof structure and the second waterproof structure both include M ribs and N grooves, M and N are positive numbers greater than or equal to 0, and M+N is greater than or equal to 1; when M+N is greater than 1, the ribs and the grooves are alternately distributed along the second direction, and the ribs and the grooves both extend along the first direction.

[0025] In some embodiments, on the first conductive terminal, the first mounting portion is provided with a first positioning hole, and the first connecting portion is provided with a first anti-pull-off hole;

[0026] And / or, on the second conductive terminal, a second positioning hole is provided on the second mounting portion, and a second anti-pull-off hole is provided on the second connecting portion;

[0027] And / or, on the intermediate conductive terminal, both the first conductive portion and the second conductive portion are provided with intermediate pull-off prevention holes.

[0028] Another object of the present utility model is to provide a photovoltaic junction box, which comprises a box body and the photovoltaic bypass module as described above arranged in the box body.

[0029] The photovoltaic bypass module provided by the embodiment of the utility model utilizes the first gap formed between the first conductive terminal and the middle conductive terminal, and the second gap formed between the second conductive terminal and the middle conductive terminal to respectively penetrate the bus bar, so that the positions of the threading holes for penetrating the bus bar are relatively concentrated. When the junction box provided with the photovoltaic bypass module is connected to the photovoltaic component, the bus bar can be directly penetrated into the box to reach the first welding pad, the middle welding pad or the second welding pad, without the need for other operations such as bending the bus bar, which makes the installation of the junction box more convenient and improves the work efficiency.

[0030] Furthermore, in the photovoltaic bypass module of the embodiment of the utility model, the bypass element is in direct contact with the conductive terminal to achieve electrical connection, the heat dissipation path is shorter, and the contact area is larger than the contact area when the axial diode is used, the heat dissipation area is larger, and it has a relatively higher overcurrent capacity. At the same time, the structure of the photovoltaic bypass module of this embodiment enables it to be packaged in a relatively small volume to form a series-connected integrated dual-core bypass module structure, which can further reduce the size of the box body and reduce costs.

[0031] Furthermore, in the photovoltaic bypass module of the embodiment of the utility model, when setting the bypass element, only one end of the bypass element needs to be connected to the conductive terminal through a jumper, the number of welding points is small, the situation of poor welding is reduced, and the resistance is relatively reduced, so that the heat dissipation of the entire photovoltaic bypass module is reduced, and its heat dissipation capacity is improved. At the same time, it also reduces the welding and fixing between the structures due to the need for assembly during installation, making the production process more convenient, providing process stability, and reducing labor costs.

[0032] The photovoltaic junction box of the utility model includes all the technical features of the photovoltaic bypass module and also has the corresponding advantages of the photovoltaic bypass module. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] AttachedFigure 1 This is a schematic structural diagram of a photovoltaic module according to a specific embodiment of the utility model;

[0034] Attached Figure 2 This is a schematic structural diagram of a photovoltaic junction box according to a specific embodiment of the utility model;

[0035] Attached Figure 3 For attachment Figure 2 Schematic diagram of the structural decomposition of the photovoltaic junction box;

[0036] Attached Figure 4 This is a schematic diagram of the further structural decomposition of one of the photovoltaic junction boxes;

[0037] Attached Figure 5 For attachment Figure 2 A schematic diagram of the distribution of the first conductive terminal, the middle conductive terminal and the second conductive terminal of the photovoltaic bypass module in the photovoltaic junction box;

[0038] Attached Figure 6 For attachment Figure 5 A schematic diagram of a top view structure;

[0039] Attached Figure 7 For attachment Figure 5 A side view structural schematic diagram of;

[0040] Attached Figure 8 For attachment Figure 5 Schematic diagram of the structure viewed from above;

[0041] Attached Fig. 9 For attachment Figure 5 A schematic diagram showing a circuit diagram of ...

[0042] Attached Fig.10 For attachment Fig. 9 A schematic diagram after adding a first packaging component and a second packaging component on the basis of FIG.

[0043] Attached Fig.11 For attachment Fig.10 A schematic diagram of a top view structure;

[0044] Attached Fig.12 For attachment Fig.10 A side view structural schematic diagram of;

[0045] Attached Fig.13 For attachment Fig.10 Schematic diagram of the structure viewed from above;

[0046] Wherein: 10, positive electrode junction box; 20, middle junction box; 30, negative electrode junction box; 40, back plate; 50, battery string group; 501, first battery string; 502, second battery string; 60, 70, 80, busbar; 100, photovoltaic bypass module; 101, box body; 102, box cover;

[0047] 1. first conductive terminal; 11. first protruding portion; 12. first main body; 12a. first connecting portion; 12b. first mounting portion; 13. first solder pad; 14. first positioning hole; 15. first anti-pull-off hole; 16. first waterproof structure;

[0048] 2. second conductive terminal; 21. second protruding portion; 22. second main body; 22a. second connecting portion; 22b. second mounting portion; 23. second solder pad; 24. second positioning hole; 25. second anti-pull-off hole; 26. anti-fool groove; 27. second waterproof structure;

[0049] 3. middle conductive terminal; 31. middle main body; 32. middle protruding portion; 33. first conductive portion; 34. second conductive portion; 35. middle pad; 36. middle anti-pull-off hole;

[0050] 4. A first bypass element; 5. A second bypass element; 6. A first jumper; 7. A second jumper; 8. A first package; 9. A second package. DETAILED DESCRIPTION

[0051] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments, so that the advantages and features of the utility model can be more easily understood by those skilled in the art. Obviously, the embodiments described in this application are only part of the embodiments of the application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of this application.

[0052] It should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0053] See also Figure 1The photovoltaic assembly shown in the figure comprises a plurality of battery strings which are parallel to each other and extend in the longitudinal direction, a back plate 40 for carrying the battery strings, and a photovoltaic junction box. In this embodiment, there are 6 battery strings, and every two battery strings (respectively a first battery string 501 and a second battery string 502) form a battery string group 50; see Figures 1 to 3 As shown, the photovoltaic junction box is a split junction box, which includes a positive junction box 10, a negative junction box 30 and an intermediate junction box 20. The positive junction box 10, the negative junction box 30 and the intermediate junction box 20 are all provided with a photovoltaic bypass module 100, and each photovoltaic bypass module 100 is connected to a corresponding battery string group 50.

[0054] Here, the structure of the photovoltaic junction box, especially the specific structure of the photovoltaic bypass module 100 therein, is described by taking the positive electrode junction box 10 as an example. Figure 4 As shown, the photovoltaic junction box includes a box body 101 and a box cover 102. The box body 101 and the box cover 102 can form a closed inner cavity when they cooperate with each other. The photovoltaic bypass module 100 is arranged on the box body 101 and is located in the inner cavity of the photovoltaic junction box.

[0055] See also Figures 4 to 13 As shown, the photovoltaic bypass module 100 of this embodiment includes a first conductive terminal 1, a second conductive terminal 2, and an intermediate conductive terminal 3 located between the first conductive terminal 1 and the second conductive terminal 2. The first conductive terminal 1, the intermediate conductive terminal 3 and the second conductive terminal 2 are sequentially distributed in the horizontal direction, and there is a gap between the three. That is to say, the three are not in contact with each other and cannot be directly contacted and electrically connected through their own conductive properties. The photovoltaic bypass module 100 also includes a first bypass module diode arranged between the first conductive terminal 1 and the intermediate conductive terminal 3, and a second bypass module diode arranged between the intermediate conductive terminal 3 and the second conductive terminal 2. The specific structure of each part is arranged in the following manner:

[0056] The intermediate conductive terminal 3 includes an intermediate main body 31, an intermediate protrusion 32, a first conductive portion 33 and a second conductive portion 34, wherein the intermediate protrusion 32 protrudes and extends from the intermediate main body 31 along the first direction away from the intermediate main body, the first conductive portion 33 and the second conductive portion 34 are respectively arranged at two different sides of the intermediate main body 31 along the second direction, and the intermediate protrusion 32 is also provided with an intermediate pad 35 for connecting the bus bar, and the above-mentioned first direction and the second direction are two different directions intersectingly arranged. Here, the above-mentioned first direction and the second direction are perpendicular to each other, and when the photovoltaic bypass module 100 is installed on the box body 101, the above-mentioned first direction corresponds to the width direction of the box body 101, and the second direction corresponds to the length direction of the box body 101; the intermediate main body 31 extends along the second direction, and its extension length in the second direction is greater than the extension length of the intermediate protrusion 32 in the second direction, and the first conductive portion 33 and the second conductive portion 34 are respectively arranged at two ends of the intermediate main body 31, and the extension lengths of the two along the first direction can be the same or different.

[0057] The first conductive terminal 1 includes a first main body 12 and a first protrusion 11 extending away from the first main body 12 along a second direction. A first solder pad 13 for connecting a bus bar is disposed on the first protrusion 11. The first bypass module diode is disposed between the first main body 12 and the first conductive portion 33.

[0058] The second conductive terminal 2 includes a second main body 22 and a second protrusion 21 extending away from the second main body 22 along a second direction. A second solder pad 23 for connecting a bus bar is disposed on the second protrusion 21 . The second bypass module diode is disposed between the second main body 22 and the second conductive portion 34 .

[0059] The first protrusion 11 and the second protrusion 21 are respectively arranged on different sides of the middle protrusion 32 in the second direction, wherein a first gap A for passing the bus bar is formed between the first protrusion 11 and the middle protrusion 32, and a second gap B for passing the bus bar is formed between the second protrusion 21 and the middle protrusion 32.

[0060] In this way, the bus strap connected to the first welding pad 13 can pass through the first gap A, the bus strap connected to the second welding pad 23 can pass through the second gap B, and the bus strap connected to the middle welding pad 35 can directly pass through one side of the middle protrusion 32, which makes the position of the threading holes for threading the bus straps relatively concentrated. When the junction box provided with the photovoltaic bypass module 100 is connected to the photovoltaic component, the bus strap can be directly inserted into the box to reach the first welding pad 13 or the middle welding pad 35 or the second welding pad 23, without the need for bending the bus strap or other operations, which makes the installation of the junction box more convenient and improves work efficiency.

[0061] Further in this embodiment, referring to the accompanying drawings, along the first direction, the first protrusion 11, the middle protrusion 32 and the second protrusion 21 are located on the same side of the middle main body 31, and the first protrusion 11 and the second protrusion 21 are spaced apart from the middle main body 31 in the first direction, so that the three are not in direct contact with each other to avoid forming a direct electrical connection. At the same time, the above arrangement also makes the arrangement of the first conductive terminal 1, the second conductive terminal 2 and the middle conductive terminal 3 along the second direction more compact, which is beneficial to reducing the overall size of the photovoltaic bypass module 100 and reducing the size of the photovoltaic junction box.

[0062] Furthermore, in the present embodiment, the first bypass module diode, the first solder pad 13, the first gap A, the middle solder pad 35, the second gap B, the second solder pad 23 and the second bypass module diode are sequentially distributed in the second direction, so that the overall structure of the entire photovoltaic bypass module is concise, the functional area and the connection area are clear, and it provides convenience for the user's installation and connection operations.

[0063] More specifically, the first bypass module diode includes a first bypass element 4, one end of which is electrically connected to the first conductive part 33, and the other end of which is electrically connected to the first main body 12 through a first jumper 6; the second bypass module diode includes a second bypass element 5, one end of which is electrically connected to the second main body 22, and the other end of which is electrically connected to the second conductive part 34 through a second jumper 7.

[0064] The polarity of the end of the first bypass element 4 electrically connected to the first conductive portion 33 is opposite to the polarity of the end of the second bypass element 5 electrically connected to the second conductive portion 34 through the second jumper 7. Specifically in this embodiment:

[0065] The N pole of the first bypass element 4 is electrically connected to the first conductive portion 33 of the intermediate conductive terminal 3, and the P pole is electrically connected to the first jumper 6 to form a PN junction functional area of ​​the first diode. The other end of the first jumper 6 is electrically connected to the first main body 12 of the first conductive terminal 1 to form a first bypass module diode. When current flows through the first conductive terminal 1, the first bypass module diode is forward-conducted.

[0066] The N pole of the second bypass element 5 is electrically connected to the second main body 22 of the second conductive terminal 2, and the P pole is electrically connected to the second jumper 7 to form a PN junction functional area of ​​the second diode. The other end of the second jumper 7 is electrically connected to the second conductive portion 34 of the intermediate conductive terminal 3 to form a second bypass module diode. When current flows through the intermediate conductive terminal 3, the second bypass module diode is forward-conducted.

[0067] The above-mentioned first conductive terminal 1, second conductive terminal 2, and intermediate conductive terminal 3 are all conductive plates, preferably copper plates; the first bypass element 4 and the second bypass element 5 are both chips, one side surface of the first bypass element 4 is in contact with and electrically connected to the surface of the intermediate conductive terminal 3, and one side surface of the second bypass element 5 is in contact with and electrically connected to the surface of the second conductive terminal 2.

[0068] The first jumper wire 6 and the second jumper wire 7 are both copper sheets. The two ends of the first jumper wire 6 are electrically connected by respectively welding on the first bypass element 4 and the first conductive terminal 1; the two ends of the second jumper wire 7 are electrically connected by respectively welding on the second bypass element 5 and the second conductive part 34. The above-mentioned welding can be specifically carried out by tin soldering.

[0069] In this embodiment, Figure 6 As shown, the first main body portion 12 includes a first mounting portion 12b and a first connecting portion 12a for electrically connecting to the first jumper 6, and the first mounting portion 12b, the first connecting portion 12a and the first protruding portion 11 are sequentially connected in the second direction; the second main body portion 22 includes a second mounting portion 22b and a second connecting portion 22a for electrically connecting to the second bypass element 5, and the second mounting portion 22b, the second connecting portion 22a and the second protruding portion 21 are sequentially connected in the second direction.

[0070] The first bypass module diode also includes a first package 8, and the second bypass module diode also includes a second package 9, both of which are made of epoxy resin material, wherein the first bypass element 4, the first conductive part 33, the first jumper 6 and the first connecting part 12a are wrapped and fixed by the first package 8 and insulated from the outside; the second bypass element 5, the second conductive part 34, the second jumper 7 and the second connecting part 22a are wrapped and fixed by the second package 9 and insulated from the outside. In this way, an integrated dual-core bypass module structure is formed.

[0071] In the photovoltaic bypass module 100, a first waterproof structure 16 is provided on the surface of the first conductive terminal 1. The first waterproof structure 16 has two groups and is disposed on two different sides of the first connecting portion 12a in the second direction to prevent water from flowing onto the first connecting portion 12a and affecting the electrical connection with the first jumper 6 and damaging the first bypass element 4. A second waterproof structure 26 is provided on the surface of the second conductive terminal 2. The second waterproof structure 26 has two groups and is disposed on two different sides of the second connecting portion 22a in the second direction to prevent water from flowing onto the second connecting portion 22a and affecting the electrical connection with the second bypass element 5 and damaging the second bypass element 5. Specifically, the first waterproof structure 16 and the second waterproof structure 26 each include M convex ribs and N grooves, where M and N are both positive numbers greater than or equal to 0, and M+N is greater than or equal to 1; when M+N is greater than 1, the convex ribs and the grooves are alternately distributed in sequence along the second direction, and the convex ribs and the grooves both extend along the first direction.

[0072] When assembling the photovoltaic bypass module 100, one end of the first jumper 6 is welded to the first connection portion 12a of the first conductive terminal 1, and the other end is welded to the side surface of the first bypass element 4 and electrically connected to one end thereof; one end of the second jumper 7 is welded to the second conductive portion 34 of the intermediate conductive terminal 3, and the other end is welded to the side surface of the second bypass element 5 and electrically connected to one end thereof; then the other side surface of the first bypass element 4 is attached to the first conductive portion 33 of the intermediate conductive terminal 3, and the first jumper 6 and the first connection portion 12a are wrapped with epoxy resin material to form a first package 8, so that the first bypass element 4 is electrically connected to the first conductive portion 33; the other side surface of the second bypass element 5 is attached to the second connection portion 22a of the second conductive terminal 2, and then the second bypass element 5, the second conductive portion 34, the second jumper 7 and the second connection portion 22a are wrapped with epoxy resin material to form a second package 9, so that the second bypass element 5 is electrically connected to the second conductive terminal 2.

[0073] In this way, the assembly of the photovoltaic bypass module 100 is realized, wherein there are only welding points at the two ends of the first jumper 6 and the second jumper 7, respectively, the number of welding points is small, the condition of poor welding is reduced, and the resistance is relatively reduced, so that the heat dissipation of the entire photovoltaic bypass module is reduced, and its heat dissipation capacity is improved; at the same time, the first bypass element 4 and the second bypass element 5 are directly in contact with the conductive copper plate to achieve electrical connection, the heat dissipation path is shorter, and the contact area with the copper plate is larger than that of the axial diode, the heat dissipation area is larger, and it has a relatively higher overcurrent capacity.

[0074] See also Figure 5As shown, in this embodiment, a plurality of first positioning holes 14 are further provided on the first mounting portion 12b of the first conductive terminal 1, and a first anti-pull-off hole 15 is provided on the first connecting portion 12a to increase the connection strength and prevent dislocation or pulling off during welding; similarly, a second positioning hole 24 is provided on the second mounting portion 22b of the second conductive terminal 2, a second anti-pull-off hole 25 is provided on the second connecting portion 22a, and an anti-misalignment groove 26 is also provided on the second mounting portion 22b; an intermediate anti-pull-off hole 36 is provided on the first conductive portion 33 and the second conductive portion 34 of the intermediate conductive terminal 3, and at least part of the above-mentioned first anti-pull-off hole 15, the second anti-pull-off hole 25 and the intermediate anti-pull-off hole 36 can store glue. When the photovoltaic bypass module 100 is installed on the box body 101 of the junction box, glue can be applied in the box body 101, and the first conductive terminal 1, the second conductive terminal 2 and the middle conductive terminal 3 are installed on the box body 101 according to the first positioning hole 14, the second positioning hole 24 and the anti-misalignment groove 26. The installation is convenient, and a part of the glue can enter the first anti-pull-off hole 15, the second anti-pull-off hole 25 and the middle anti-pull-off hole 36, thereby increasing the adhesion between the first conductive terminal 1, the second conductive terminal 2 and the middle conductive terminal 3 and the box body 101 to prevent them from being pulled off, and the connection stability is further improved.

[0075] like Figure 1 As shown, in the photovoltaic assembly, each battery string is connected in parallel with a bypass module diode. Specifically, the first battery string group 50 is taken as an example for explanation: see Figure 1 As shown, the positive electrode of the first battery string 501 is connected to the first conductive terminal 1 in the positive terminal box 10 through the bus bar 60, and the negative electrode of the first battery string 501 is connected in series to the second battery string 502 through the bus bar 70. At the same time, the bus bar 50 is connected to the intermediate conductive terminal 3 in the positive terminal box 10 through the jumper 80, and the first battery string 501 is connected in parallel with the first bypass module diode in the above manner. At the same time, the negative electrode of the second battery string 502 is connected to the second conductive terminal 2 in the positive terminal box 10 through the bus bar to realize the parallel connection of the second battery string 502 and the second bypass module diode. The connection between the intermediate terminal box 20 and the second battery string group, and the connection between the negative terminal box 30 and the third battery string group are similar to the above connection method and will not be repeated here.

[0076] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A photovoltaic bypass module, characterized in that: The photovoltaic bypass module includes a first conductive terminal, an intermediate conductive terminal and a second conductive terminal sequentially arranged in a horizontal direction, and the photovoltaic bypass module also includes a first bypass module diode arranged between the first conductive terminal and the intermediate conductive terminal, and a second bypass module diode arranged between the intermediate conductive terminal and the second conductive terminal, wherein a first gap for passing a bus bar is formed between the first conductive terminal and the intermediate conductive terminal, and a second gap for passing a bus bar is formed between the second conductive terminal and the intermediate conductive terminal.

2. The photovoltaic bypass module according to claim 1, characterized in that: The intermediate conductive terminal has at least a middle protrusion, on which a middle pad for connecting a bus bar is disposed; the first conductive terminal has at least a first protrusion, on which a first pad for connecting a bus bar is disposed; the second conductive terminal has at least a second protrusion, on which a second pad for connecting a bus bar is disposed; The first protrusion and the second protrusion are arranged on two different sides of the middle protrusion, a first gap is formed between the first protrusion and the middle protrusion, and a second gap is formed between the second protrusion and the middle protrusion.

3. The photovoltaic bypass module according to claim 2, characterized in that: The first bypass module diode, the first pad, the first gap, the middle pad, the second gap, the second pad, and the second bypass module diode are sequentially distributed in the same direction.

4. The photovoltaic bypass module according to claim 2, characterized in that: The intermediate conductive terminal further comprises an intermediate main body, a first conductive portion and a second conductive portion, wherein the intermediate protruding portion protrudes from the intermediate main body along a first direction away from the intermediate main body, and the first conductive portion and the second conductive portion are arranged on two different sides of the intermediate main body along a second direction, wherein the first direction intersects with the second direction; The first conductive terminal further includes a first main body portion, and the first protrusion extends away from the first main body portion along the second direction; The second conductive terminal further includes a second main body portion, and the second protrusion portion extends away from the second main body portion along the second direction; The first bypass module diode is disposed between the first main body and the first conductive part, and the second bypass module diode is disposed between the second main body and the second conductive part.

5. The photovoltaic bypass module according to claim 4, characterized in that: Along the first direction, the first protrusion, the middle protrusion, and the second protrusion are located on the same side of the middle main body.

6. The photovoltaic bypass module according to claim 5, characterized in that: The first protruding portion and the second protruding portion are arranged with a gap between them and the middle main body portion in the first direction.

7. The photovoltaic bypass module according to claim 4, characterized in that: The first bypass module diode includes a first bypass element, one end of which is electrically connected to the first conductive part, and the other end of which is electrically connected to the first main body through a first jumper; the second bypass module diode includes a second bypass element, one end of which is electrically connected to the second main body, and the other end of which is electrically connected to the second conductive part through a second jumper.

8. The photovoltaic bypass module according to claim 7, characterized in that: The N pole of the first bypass element is electrically connected to the first conductive part, the P pole of the first bypass element is electrically connected to one end of the first jumper, and the other end of the first jumper is electrically connected to the first conductive terminal, so as to form the first bypass module diode; The N pole of the second bypass element is electrically connected to the second conductive terminal, the P pole of the second bypass element is electrically connected to one end of the second jumper, and the other end of the second jumper is electrically connected to the second conductive part to form the second bypass module diode.

9. The photovoltaic bypass module according to claim 7, characterized in that: The intermediate conductive terminal, the first conductive terminal and the second conductive terminal are all conductive plates, the first bypass element and the second bypass element are both chips, a side surface of the first bypass element contacts and is electrically connected to a surface of the first conductive portion, and a side surface of the second bypass element contacts and is electrically connected to a surface of the second conductive terminal.

10. The photovoltaic bypass module according to claim 7, characterized in that: The first main body includes a first mounting portion and a first connecting portion for electrically connecting to the first jumper, the first mounting portion, the first connecting portion and the first protruding portion are sequentially connected in the second direction, the first bypass module diode also includes a first packaging component, the first bypass element, the first conductive portion, the first jumper and the first connecting portion are wrapped and fixed by the first packaging component; The second main body portion includes a second mounting portion and a second connecting portion for electrically connecting to the second bypass element, the second mounting portion, the second connecting portion and the second protruding portion are sequentially connected in the second direction, the second bypass module diode also includes a second package, and the second bypass element, the second conductive portion, the second jumper and the second connecting portion are wrapped and fixed by the second package.

11. The photovoltaic bypass module according to claim 10, characterized in that: A first waterproof structure is disposed on the surface of the first conductive terminal, and the first waterproof structure has two groups and is disposed on two different sides of the first connecting portion in the second direction; and / or a second waterproof structure is disposed on the surface of the second conductive terminal, and the second waterproof structure has two groups and is disposed on two different sides of the second connecting portion in the second direction; Among them, the first waterproof structure and the second waterproof structure both include M ribs and N grooves, M and N are positive numbers greater than or equal to 0, and M+N is greater than or equal to 1; when M+N is greater than 1, the ribs and the grooves are alternately distributed along the second direction, and the ribs and the grooves both extend along the first direction.

12. The photovoltaic bypass module according to claim 10, characterized in that: On the first conductive terminal, the first mounting portion is provided with a first positioning hole, and the first connecting portion is provided with a first anti-pull-off hole; And / or, on the second conductive terminal, a second positioning hole is provided on the second mounting portion, and a second anti-pull-off hole is provided on the second connecting portion; And / or, on the intermediate conductive terminal, both the first conductive portion and the second conductive portion are provided with intermediate pull-off prevention holes.

13. A photovoltaic junction box, characterized in that: The junction box comprises a box body, and a photovoltaic bypass module according to any one of claims 1 to 12 arranged in the box body.

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