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 comprises a plurality of conductive terminals which are sequentially arranged in the horizontal direction, any three conductive terminals which are continuously arranged are a first conductive terminal, a middle conductive terminal and a second conductive terminal in sequence, and a first bypass element is arranged between the first conductive terminal and the middle conductive terminal. And the second bypass element is arranged between the middle conductive terminal and the second conductive terminal, so that a plurality of bypass module diodes can be formed, the plurality of bypass module diodes which are connected in series can be packaged in a relatively small volume, the size of the box body can be further reduced, and the cost is reduced.

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 axial bypass diodes are arranged in each box body, 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.

[0004] 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

[0005] The purpose of the utility model is to provide a photovoltaic bypass module to solve one or more problems of the prior art.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A photovoltaic bypass module, the photovoltaic bypass module includes M conductive terminals sequentially arranged in a horizontal direction, M is a positive integer greater than or equal to 3, any three conductive terminals arranged continuously form a bypass module, and the three conductive terminals in the bypass module are defined as a first conductive terminal, an intermediate conductive terminal, and a second conductive terminal in sequence, wherein the intermediate conductive terminal has a first end adjacent to the first conductive terminal, and a second end adjacent to the second conductive terminal, the bypass module also includes a first bypass element and a second bypass element, one end of the first bypass element is electrically connected to the first end, and the other end of the first bypass element is electrically connected to the first conductive terminal through a first jumper to form a bypass module diode; one end of the second bypass element is electrically connected to the second conductive terminal, and the other end of the second bypass element is electrically connected to the second end through a second jumper to form another bypass module diode.

[0008] Preferably, in the same bypass module, the polarity of the end of the first bypass element electrically connected to the intermediate conductive terminal is opposite to the polarity of the end of the second bypass element electrically connected to the intermediate conductive terminal through the second jumper.

[0009] Preferably, the first conductive terminal, the second conductive terminal and the intermediate conductive terminal are all conductive plates, the first bypass element and the second bypass element are both chips, one side surface of the first bypass element is in contact with and electrically connected to a surface of the intermediate conductive terminal, and one side surface of the second bypass element is in contact with and electrically connected to a surface of the second conductive terminal.

[0010] Preferably, the bypass module further includes a first package and a second package, and the first bypass element, the first end and the first jumper are wrapped and fixed by the first package; the second bypass element, the second end and the second jumper are wrapped and fixed by the second package.

[0011] In some embodiments, the first conductive terminal has a first end, the first jumper is electrically connected to the first end, and at least one side portion of at least one of the first end and the first end is in a wavy structure;

[0012] And / or, the second conductive terminal has a second end, the second bypass element is electrically connected to the second end, and at least one side portion of at least one of the second end and the second end portion has a wavy structure,

[0013] Among them, the wavy structure includes A convex parts and B concave parts, wherein A and B are integers greater than or equal to 0, and A+B is greater than or equal to 1; when A+B is greater than 1, the convex parts and concave parts are alternately distributed in the horizontal direction.

[0014] In some embodiments, the length of the first terminal is smaller than the length of the first end portion, and the first terminal is also wrapped and fixed by the first packaging member;

[0015] And / or, the length of the second end head is greater than the length of the second end portion, and the second end head is also wrapped and fixed by the second packaging component.

[0016] In some embodiments, two connection ends of the first jumper, the first bypass element, two connection ends of the second jumper, and the second bypass element are located in the same horizontal direction.

[0017] In some embodiments, the first conductive terminal has a first end, the first jumper is electrically connected to the first end, a first waterproof structure is provided on a surface of the first conductive terminal, and the first waterproof structure is provided on a side of the first end away from the first end portion;

[0018] And / or, the second conductive terminal has a second end, the second bypass element is electrically connected to the second end, a second waterproof structure is provided on a surface of the second conductive terminal, and the second waterproof structure is provided on a side of the second end away from the second end portion,

[0019] Among them, the first waterproof structure and the second waterproof structure both include C ribs and D grooves, C and D are integers greater than or equal to 0, and C+D is greater than or equal to 1; when C+D is greater than 1, the ribs and the grooves are alternately distributed in the horizontal direction, and the extension direction of the ribs and the grooves is inclined or perpendicular to the distribution direction of the multiple conductive terminals.

[0020] Preferably, the two connecting ends of the first jumper, the first bypass element, the two connecting ends of the second jumper, and the second bypass element are located in the same horizontal direction.

[0021] Preferably, the first conductive terminal is provided with a first solder pad for connecting the bus bar and a first through-hole for penetrating the bus bar, the second conductive terminal is provided with a second solder pad for connecting the bus bar and a second through-hole for penetrating the bus bar, the intermediate conductive terminal is provided with an intermediate solder pad for connecting the bus bar and an intermediate through-hole for penetrating the bus bar, wherein the first through-hole is provided between the first solder pad and the first bypass element, and the second through-hole is provided between the second solder pad and the second bypass element.

[0022] In some embodiments, the intermediate conductive terminal includes a main body portion, and a first extension portion and a second extension portion which are respectively arranged on two different sides of the main body portion and extend outward away from the main body portion, wherein the first extension portion constitutes the first end portion, the second extension portion constitutes the second end portion, and the intermediate solder pad is arranged on the main body portion.

[0023] In some embodiments, the first perforation, the middle perforation, and the second perforation are all referred to as busbar perforations, and the busbar perforations have a first hole segment extending along a first direction, and / or a second hole segment extending along a second direction, wherein the first direction is perpendicular to the second direction.

[0024] In some embodiments, the busbar perforations are in a straight line shape extending along the first direction;

[0025] or in the shape of a letter “I” extending along the second direction;

[0026] Or in an "L" shape;

[0027] Or it can be in the shape of “[” or “]”.

[0028] In some embodiments, the first conductive terminal is further provided with a first through-hole for passing the bus bar, the second conductive terminal is provided with a second through-hole for passing the bus bar, and the middle conductive terminal is provided with a middle through-hole for passing the bus bar, wherein the first through-hole is provided between the first soldering pad and the first bypass element, and the second through-hole is provided between the second soldering pad and the second bypass element.

[0029] Another object of the present invention 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.

[0030] The photovoltaic bypass module provided by the embodiment of the utility model, in which bypass elements are arranged between multiple conductive terminals arranged in sequence to form multiple bypass module diodes, can be packaged in a relatively small volume to form multiple bypass module diodes connected in series, which can further reduce the size of the box body and reduce costs.

[0031] In the photovoltaic bypass module, 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 an axial diode is used, the heat dissipation area is larger, and it has a relatively higher overcurrent capacity.

[0032] In the photovoltaic bypass module, when setting the bypass element, only one end of the bypass element needs to be connected to the conductive terminal through a jumper wire, 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.

[0033] The structure of the photovoltaic bypass module also reduces the welding and fixing between the structures required for assembly during installation, making the production process more convenient, providing process stability and reducing labor costs.

[0034] 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

[0035] Attached Figure 1 This is a schematic diagram of the structure of a photovoltaic module according to Embodiment 1 of the present utility model;

[0036] Attached Figure 2 This is a schematic diagram of the structure of a photovoltaic junction box according to Embodiment 1 of the present utility model;

[0037] Attached Figure 3 For attachment Figure 2 Schematic diagram of the structural decomposition of the photovoltaic junction box;

[0038] Attached Figure 4 This is a schematic diagram of the further structural decomposition of one of the photovoltaic junction boxes;

[0039] Attached Figure 5 Schematic diagram of the distribution of the first conductive terminal, the middle conductive terminal and the second conductive terminal in the photovoltaic bypass module of Example 1;

[0040] Attached Figure 6 For attachment Figure 5 A schematic diagram showing a circuit diagram of ...

[0041] Attached Figure 7 For attachment Figure 6 A schematic diagram after adding a first packaging component and a second packaging component on the basis of FIG.

[0042] Attached Figure 8 This is a schematic diagram of the overall structure of a photovoltaic junction box according to Embodiment 2 of the present utility model;

[0043] Attached Fig. 9 For attachment Figure 8 Schematic diagram of the internal structure of a photovoltaic junction box;

[0044] Attached Fig.10 For attachment Figure 8 A schematic diagram of a top view structure of multiple conductive terminals in a photovoltaic bypass module in a photovoltaic junction box;

[0045] Attached Fig.11 For attachment Fig.10 A side view structural schematic diagram of;

[0046] Attached Fig.12 For attachment Fig.10 Schematic diagram of the structure viewed from above;

[0047] Attached Fig.13 For attachment Fig.10 Schematic diagram of the three-dimensional structure;

[0048] Attached Fig.14 For attachment Figure 8 A schematic diagram of the top view structure of a photovoltaic bypass module in a photovoltaic junction box;

[0049] Attached Fig.15 For attachment Fig.14 A side view structural schematic diagram of;

[0050] Attached Fig.16 For attachment Fig.14 Schematic diagram of the structure viewed from above;

[0051] Attached Fig.17 For attachment Fig.14 Schematic diagram of the three-dimensional structure;

[0052] Attached Fig.18 It is a schematic structural diagram of a photovoltaic assembly having a photovoltaic junction box according to Example 2;

[0053] 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; 90, integral junction box; 101, box body; 102, box cover; 100, photovoltaic bypass module;

[0054] 1. first conductive terminal; 11. first main body; 12. first terminal; 13. first pad; 14. first through hole; 15. wavy structure; 16. first waterproof structure;

[0055] 2. second conductive terminal; 21. second body; 22. second terminal; 23. second pad; 24. second through hole; 25. wavy structure; 26. second waterproof structure;

[0056] 3. middle conductive terminal; 31. first end; 32. second end; 33. main body; 34. middle pad; 34. middle through hole; 35, 36. wavy structure; 35a. convex part; 35b. concave part;

[0057] 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

[0058] 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.

[0059] 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.

[0060] As shown in the drawings, the utility model provides a photovoltaic bypass module, which includes M conductive terminals arranged in sequence along the horizontal direction, M is a positive integer greater than or equal to 3, and any three conductive terminals arranged continuously form a bypass module, that is, the photovoltaic bypass module has more than one bypass module. The specific structure and working principle of the photovoltaic bypass module are described below in conjunction with specific embodiments.

[0061] Example 1

[0062] See also Figure 1 The 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.

[0063] 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.

[0064] See also Figures 4 to 7As shown, the number of conductive terminals in the photovoltaic bypass module 100 of this embodiment is 3, that is, the number of bypass modules in the photovoltaic bypass module 100 is 1. The three conductive terminals are defined as 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 along the horizontal direction, and there are gaps 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.

[0065] The bypass module also includes a first bypass element 4 and a second bypass element 5, wherein the intermediate conductive terminal 3 has a first end 31 adjacent to the first conductive terminal 1, and a second end 32 adjacent to the second conductive terminal 2, one end of the first bypass element 4 is connected to the first end 31, and the other end of the first bypass element 4 is electrically connected to the first conductive terminal 1 through a first jumper 6 to form a bypass module diode; one end of the second bypass element 5 is electrically connected to the second conductive terminal 2, and the other end of the second bypass element 5 is electrically connected to the second end 32 through a second jumper 7 to form another bypass module diode.

[0066] The polarity of the end of the first bypass element 4 electrically connected to the middle conductive terminal 3 is opposite to the polarity of the end of the second bypass element 5 electrically connected to the middle conductive terminal 3 through the second jumper 7. Specifically in this embodiment:

[0067] The N pole of the first bypass element 4 is electrically connected to the middle conductive terminal 3, and the P pole is electrically connected to the first jumper 6, forming a PN junction functional area of ​​the first diode. The other end of the first jumper 6 is electrically connected to 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.

[0068] The N pole of the second bypass element 5 is electrically connected to the second conductive terminal 2, and the P pole is electrically connected to the second jumper 7, forming a PN junction functional area of ​​a second diode. The other end of the second jumper 7 is electrically connected to the second end 32 of the intermediate conductive terminal 3, forming a second bypass module diode. When current flows through the intermediate conductive terminal 3, the second bypass module diode is forward-conducted.

[0069] 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.

[0070] 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 being respectively welded to the first bypass element 4 and the first conductive terminal 1; the two ends of the second jumper wire 7 are electrically connected by being respectively welded to the second bypass element 5 and the second end 32.

[0071] The bypass module also includes a first package 8 and a second package 9, both of which are made of epoxy resin material, wherein the first bypass element 4, the first end 31 and the first jumper 6 are wrapped and fixed by the first package 8 and insulated from the outside; the second bypass element 5, the second end 32 and the second jumper 7 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.

[0072] More specifically, see Figures 4 to 7 As shown, the first conductive terminal 1 includes a first body 11 and a first terminal 12 extending from one end of the first body 11 away from the first body 11; the second conductive terminal 2 includes a second body 21 and a second terminal 22 extending from one end of the second body 21 away from the second body 21; the intermediate conductive terminal 3 includes a main body portion 33, and a first extension portion and a second extension portion which are arranged on different sides of the main body portion 33 and extend outward away from the main body portion 33, wherein the above-mentioned first extension portion constitutes the first end portion 31, and the second extension portion constitutes the second end portion 32.

[0073] The first conductive terminal 1 is provided with a first soldering pad 13 for connecting the bus bar and a first through-hole 14 for penetrating the bus bar. The first soldering pad 13 is provided on a side of the first conductive terminal 1 away from the first end 31. Specifically, the first soldering pad 13 and the first through-hole 14 are both provided on the first main body 11, and the first through-hole 14 is closer to the first end 12 than the first soldering pad 13.

[0074] The second conductive terminal 2 is provided with a second soldering pad 23 for connecting the bus bar and a second through-hole 24 for penetrating the bus bar. The second soldering pad 23 is provided on a side of the second conductive terminal 2 away from the second end 32. Specifically, the second soldering pad 23 and the second through-hole 24 are both provided on the second body 21, and the second through-hole 24 is closer to the second end 22 than the second soldering pad 23.

[0075] The middle conductive terminal 3 is provided with a middle pad 34 for connecting the bus bar and a middle through hole 35 for passing the bus bar. The middle pad 34 and the middle through hole 35 are arranged side by side on the main body 33 .

[0076] The above arrangement makes the connection positions of all busbars on the photovoltaic bypass module relatively more concentrated, which also enables the overall size of the photovoltaic bypass module to be designed to be smaller, making the size and volume of the corresponding junction box smaller, thus saving costs.

[0077] The above-mentioned first perforation 14, second perforation 24 and middle perforation 34 are all called busbar perforations, and the busbar perforation has a first hole segment extending along the first direction, and / or a second hole segment extending along the second direction. The above-mentioned first direction and the second direction are perpendicular to each other, that is, the shape of the busbar perforation can be an "I" shape extending along the first direction, or an "I" shape extending along the second direction, or an "L" shape consisting of a first hole segment and a second hole segment, or a "[" or "]" shape consisting of two first hole segments and a second hole segment, or other forms not listed. The shapes of the first perforation 14, the second perforation 24 and the middle perforation 34 can be the same or different, so that it is convenient for the busbar to pass through the corresponding hole segment and connect to the corresponding welding pad when actually threading the busbar.

[0078] In the photovoltaic bypass module 100, the first conductive terminal 1, the first bypass element 4, the middle conductive terminal 3, the second bypass element 5 and the second conductive terminal 2 are sequentially arranged along the same horizontal direction. Further, the two connecting ends of the first jumper 6, the first bypass element 4, the two connecting ends of the second jumper 7, and the second bypass element 5 are located in the same horizontal direction. Furthermore, in this embodiment, the first soldering pad 13, the first through hole 14, the two connecting ends of the first jumper 6, the first bypass element 4, the middle soldering pad 34, the two connecting ends of the second jumper 7, the second bypass element 5, the second through hole 24 and the second soldering pad 23 are located in the same horizontal direction, which makes the overall structure of the photovoltaic bypass module simple, the functional area and the connection area are clear, and it provides convenience for the user's installation and connection operations.

[0079] When assembling the photovoltaic bypass module 100, one end of the first jumper 6 is welded to the first conductive terminal 1, and the other end is welded to a 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 end 32, and the other end is welded to a 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 end 31, and the first bypass element 4, the first end 31, the first jumper 6 and the first end 12 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 end 31; the other side surface of the second bypass element 5 is attached to the second end 22 of the second conductive terminal 2, and then the second bypass element 5, the second end 32 and the second jumper 7 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. 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.

[0080] In the photovoltaic bypass module 100, in order to increase the connection strength and prevent dislocation or pulling off during welding, the outer edge of at least one of the intermediate conductive terminal 3, the first conductive terminal 1, and the second conductive terminal 2 has a wavy structure. Specifically, at least one side edge of at least one of the first end 12 of the first conductive terminal 1 and the first end 31 of the intermediate conductive terminal 3 is provided with a wavy structure, and at least one side edge of at least one of the second end 22 of the second conductive terminal 2 and the second end 32 of the intermediate conductive terminal 3 is a wavy structure.

[0081] In this embodiment, both sides of the first end 12 are provided with a wavy structure 15, both sides of the second end 22 are provided with a wavy structure 25, both sides of the first end 31 of the intermediate conductive terminal 3 are provided with a wavy structure 35, and both sides of the second end 32 are provided with a wavy structure 36. Here, the wavy structure 35 is taken as an example to illustrate its specific structure, see Figure 5As shown, the wavy structure 35 includes A convex parts 35a and B concave parts 35b, wherein A and B are both integers greater than or equal to 0, and A+B is greater than or equal to 1; when A+B is greater than 1, the convex parts 35a and the concave parts 35b are alternately distributed in the horizontal direction. Here, the length of the first terminal 12 is less than the length of the first end 31, and the length of the second end 32 is less than the length of the second terminal 22. The number of convex parts 35a and concave parts 35b in each wavy structure can be determined according to the extension lengths of the first terminal 12, the second terminal 22, the first end 31, and the second end 32.

[0082] In the photovoltaic bypass module 100, a first waterproof structure 16 is provided on the surface of the first conductive terminal 1, and the first waterproof structure 16 is provided on the side of the first terminal 12 away from the first end 31 to prevent water from flowing to the position electrically connected to the first terminal 12 and the first bypass element 4; a second waterproof structure 26 is provided on the surface of the second conductive terminal 2, and the second waterproof structure 26 is provided on the side of the second terminal 22 away from the second end 32 to prevent water from flowing to the position electrically connected to the second terminal 22 and the second bypass element 5. The first waterproof structure 16 and the second waterproof structure 26 both include C ribs (not shown in the figure) and D grooves (not shown in the figure), C and D are both integers greater than or equal to 0, and C+D is greater than or equal to 1; when C+D is greater than 1, the ribs and the grooves are alternately distributed in the horizontal direction, and the extending directions of the ribs and the grooves are inclined or perpendicular to the distribution direction of the plurality of conductive terminals, and here, the extending directions of the ribs and the grooves are perpendicular to the distribution direction of all the conductive terminals.

[0083] 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 70 is connected to the intermediate conductive terminal 3 in the positive terminal box 10 through the jumper 80. 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.

[0084] Example 2

[0085] See also Figures 8 to 18As shown, in the photovoltaic bypass module 100 provided in this embodiment, the number of conductive terminals is 4, the first three conductive terminals A, B, C from left to right constitute the first group of bypass module I, and the second to fourth conductive terminals B, C, D from left to right constitute the second group of bypass module II.

[0086] The conductive terminal A serves as the first conductive terminal 1 of the first bypass module group I;

[0087] As for the conductive terminal B, it serves as the middle conductive terminal 3 of the first bypass module group I on the one hand, and serves as the first conductive terminal 1' of the second bypass module group II on the other hand;

[0088] As for the conductive terminal C, it serves as the second conductive terminal 2 of the first bypass module group I on the one hand, and as the middle conductive terminal 3' of the second bypass module group II on the other hand;

[0089] The conductive terminal D serves as the second conductive terminal 2 of the second bypass module II.

[0090] The conductive terminals A, B, C, and D are arranged in sequence from left to right with gaps between them without direct contact.

[0091] Bypass elements are provided between conductive terminal A and conductive terminal B, between conductive terminal B and conductive terminal C, and between conductive terminal C and conductive terminal D. One end of the bypass element is electrically connected to one conductive terminal through a jumper, and the other end of the bypass element is directly attached to another conductive terminal and electrically connected to the conductive terminal.

[0092] In this way, the first bypass module group I and the second bypass module group II formed can be connected to different battery strings respectively, such as Fig.18 shown.

[0093] The photovoltaic bypass module 100 in this embodiment can be integrally arranged in an integral junction box 90, which is particularly suitable for photovoltaic modules with a small number of battery strings or a small size. When the integral junction box 90 is used, the box body 101 can be installed on the side of the photovoltaic module without drilling holes on the photovoltaic module for installation, which is more convenient for installation.

[0094] In other embodiments, when the above-mentioned integrated junction box 90 is used, the number of conductive terminals may be more than 4 to form more than three groups of bypass modules.

[0095] 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 M conductive terminals sequentially arranged in a horizontal direction, M is a positive integer greater than or equal to 3, and any three consecutive conductive terminals form a bypass module. The three conductive terminals in the bypass module are defined as a first conductive terminal, a middle conductive terminal, and a second conductive terminal, wherein the middle conductive terminal has a first end adjacent to the first conductive terminal, and a second end adjacent to the second conductive terminal. The bypass module also includes a first bypass element and a second bypass element, one end of the first bypass element is electrically connected to the first end, and the other end of the first bypass element is electrically connected to the first conductive terminal through a first jumper to form a bypass module diode; one end of the second bypass element is electrically connected to the second conductive terminal, and the other end of the second bypass element is electrically connected to the second end through a second jumper to form another bypass module diode.

2. The photovoltaic bypass module according to claim 1, characterized in that: In the same bypass module, the polarity of the end of the first bypass element electrically connected to the middle conductive terminal is opposite to the polarity of the end of the second bypass element electrically connected to the middle conductive terminal through the second jumper.

3. The photovoltaic bypass module according to claim 1, characterized in that: The first conductive terminal, the second conductive terminal, and the middle 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 middle conductive terminal, and a side surface of the second bypass element contacts and is electrically connected to a surface of the second conductive terminal.

4. The photovoltaic bypass module according to claim 1, characterized in that: The bypass module also includes a first package and a second package. The first bypass element, the first end, and the first jumper are wrapped and fixed by the first package; the second bypass element, the second end, and the second jumper are wrapped and fixed by the second package.

5. The photovoltaic bypass module according to claim 4, characterized in that: The first conductive terminal has a first end, the first jumper is electrically connected to the first end, and at least one side portion of at least one of the first end and the first end is in a wavy structure; And / or, the second conductive terminal has a second end, the second bypass element is electrically connected to the second end, and at least one side portion of at least one of the second end and the second end portion has a wavy structure, Among them, the wavy structure includes A convex parts and B concave parts, wherein A and B are integers greater than or equal to 0, and A+B is greater than or equal to 1; when A+B is greater than 1, the convex parts and concave parts are alternately distributed in the horizontal direction.

6. The photovoltaic bypass module according to claim 5, characterized in that: The length of the first terminal is smaller than the length of the first end portion, and the first terminal is also wrapped and fixed by the first packaging component; And / or, the length of the second end head is greater than the length of the second end portion, and the second end head is also wrapped and fixed by the second packaging component.

7. The photovoltaic bypass module according to claim 1, characterized in that: The two connection ends of the first jumper, the first bypass element, the two connection ends of the second jumper, and the second bypass element are located in the same horizontal direction.

8. The photovoltaic bypass module according to claim 1, characterized in that: The first conductive terminal has a first end, the first jumper is electrically connected to the first end, a first waterproof structure is provided on the surface of the first conductive terminal, and the first waterproof structure is provided on a side of the first end away from the first end portion; And / or, the second conductive terminal has a second end, the second bypass element is electrically connected to the second end, a second waterproof structure is provided on a surface of the second conductive terminal, and the second waterproof structure is provided on a side of the second end away from the second end portion, Among them, the first waterproof structure and the second waterproof structure both include C ribs and D grooves, C and D are integers greater than or equal to 0, and C+D is greater than or equal to 1; when C+D is greater than 1, the ribs and the grooves are alternately distributed in the horizontal direction, and the extension direction of the ribs and the grooves is inclined or perpendicular to the distribution direction of the multiple conductive terminals.

9. The photovoltaic bypass module according to any one of claims 1 to 8, characterized in that: The first conductive terminal is provided with a first solder pad for connecting the bus bar and a first through-hole for penetrating the bus bar, the second conductive terminal is provided with a second solder pad for connecting the bus bar and a second through-hole for penetrating the bus bar, the intermediate conductive terminal is provided with an intermediate solder pad for connecting the bus bar and an intermediate through-hole for penetrating the bus bar, wherein the first through-hole is provided between the first solder pad and the first bypass element, and the second through-hole is provided between the second solder pad and the second bypass element.

10. The photovoltaic bypass module according to claim 9, characterized in that: The intermediate conductive terminal includes a main body portion, and a first extension portion and a second extension portion which are arranged on two different sides of the main body portion and extend outward away from the main body portion, wherein the first extension portion constitutes the first end portion, the second extension portion constitutes the second end portion, and the intermediate solder pad is arranged on the main body portion.

11. The photovoltaic bypass module according to claim 10, characterized in that: The first perforation, the middle perforation, and the second perforation are all referred to as busbar perforations, and the busbar perforations have a first hole segment extending along a first direction and / or a second hole segment extending along a second direction, wherein the first direction is perpendicular to the second direction.

12. The photovoltaic bypass module according to claim 11, characterized in that: The busbar perforation is in a straight line shape extending along the first direction; Or in the shape of "I" extending along the second direction; Or in an "L" shape; Or in the shape of "[" or "]".

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.

Images