CN211828788U

CN211828788U - Photovoltaic module

Info

Publication number: CN211828788U
Application number: CN202020143666.3U
Authority: CN
Inventors: 毛剑宇; 梅玲; 潘秀娟; 董经兵
Original assignee: CSI Cells Co Ltd; CSI Solar Power Group Co Ltd; Canadian Solar Manufacturing Changshu Inc
Current assignee: Canadian Solar Inc; CSI Cells Co Ltd; Canadian Solar Manufacturing Changshu Inc
Priority date: 2020-01-22
Filing date: 2020-01-22
Publication date: 2020-10-30
Anticipated expiration: 2030-01-22

Abstract

The utility model discloses a photovoltaic module, photovoltaic module includes: the battery pack comprises a first battery string group unit, a second battery string group unit and a third battery string group unit which are connected in series and arranged along the short side direction of the assembly, wherein two battery strings arranged along the short side direction of the assembly are connected in parallel to form a battery string group; each bus bar is provided with a lead-out wire, one end of each lead-out wire extends towards the direction far away from the plane where the battery piece is located, and the lead-out wires are arranged in a line along the short side direction of the assembly. The photovoltaic module can reduce the water vapor transmittance, and the reliability and the service life of the solar photovoltaic module are improved.

Description

Photovoltaic module

Technical Field

The utility model belongs to the technical field of the photovoltaic power generation technique and specifically relates to a photovoltaic module is related to.

Background

With the rapid development of photovoltaic technology, solar power stations occupy a large market at home and abroad, and the demand for high-power components is increasing.

In the related art, a conventional slicing assembly usually adopts a three-part wire box, a single wire box is only provided with one diode, and meanwhile, the existing scheme cannot meet the protection requirement of the diode on a line along with the improvement of the efficiency of a battery plate and the increase of the number of the battery plates of a future high-power assembly. The use of more diodes for a single component is a more feasible solution. Moreover, for the design of the junction box, the photovoltaic module needs to be provided with corresponding openings on the back plate, but certain damage is easily caused to the battery panel and the power generation efficiency and reliability of the module are influenced because the openings are too large and a large amount of water vapor permeates into the module.

Disclosure of Invention

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide a photovoltaic module, this photovoltaic module can reduce the steam transmissivity, promotes solar photovoltaic module's reliability and life.

In order to solve the above problem, the utility model provides a photovoltaic module, include, first battery string group unit, second battery string group unit and third battery string group unit that series connection and set up along subassembly minor face direction, first battery string group unit includes series connection and along the first battery string group and the second battery string group of subassembly long limit direction range, second battery string group unit includes series connection and along the third battery string group and the fourth battery string group of subassembly long limit direction range, third battery string group unit includes series connection and along the fifth battery string group and the sixth battery string group of subassembly long limit direction range, and every battery string group includes parallel connection and along the first battery string and the second battery string of subassembly short face direction range, and every battery string includes the equal and series connection's battery piece of quantity;

a first lead bus bar extending parallel to the long side direction of the module is provided between the first battery string group and the third battery string group, the first battery string group is reversely connected in parallel to a first bypass diode through the first lead bus bar, a second lead bus bar extending parallel to the long side direction of the module is provided between the second battery string group and the fourth battery string group, the second battery string group is reversely connected in parallel to a second bypass diode through the second lead bus bar, the fourth battery string group is reversely connected in parallel to a fourth bypass diode through the second lead bus bar, a third lead bus bar extending parallel to the long side direction of the module is provided between the third battery string group and the fifth battery string group, the third battery string group is reversely connected in parallel to a third bypass diode through the third lead bus bar, the fifth battery string group is reversely connected with a fifth bypass diode in parallel through the third lead bus bar, a fourth lead bus bar extending parallel to the long side direction of the assembly is arranged between the fourth battery string group and the sixth battery string group, the sixth battery string group is reversely connected with a sixth bypass diode in parallel through the fourth lead bus bar, each lead bus bar is provided with a first outgoing line, one end of each first outgoing line is electrically connected with the corresponding lead bus bar, and the other end of each first outgoing line extends towards the direction far away from the plane of the battery piece;

a first center bus bar extending in parallel to a short side direction of the module is provided between the first cell string group and the second cell string group, the first bypass diode is electrically connected between an end of the first center bus bar and the first lead bus bar, the second bypass diode is electrically connected between an end of the first center bus bar and the second lead bus bar, a second center bus bar extending in parallel to the short side direction of the module is provided between the third cell string group and the fourth cell string group, the fourth bypass diode is electrically connected between one end of the second center bus bar and the second lead bus bar, the third bypass diode is electrically connected between the other end of the second center bus bar and the third lead bus bar, a third center bus bar extending in parallel to the short side direction of the module is provided between the fifth cell string group and the sixth cell string group, electrically connecting the fifth bypass diode between the end of the third center bus bar and the third lead bus bar, and electrically connecting the sixth bypass diode between the end of the third center bus bar and the fourth lead bus bar, wherein a second outgoing line is arranged on the end of each center bus bar, one end of each second outgoing line is electrically connected with the corresponding center bus bar, and the other end of each second outgoing line extends in a direction away from the plane of the cell sheet;

wherein the first outgoing line of the first lead bus bar, the second outgoing line of the first center bus bar, the first outgoing line of the second lead bus bar, and the second outgoing line of one end portion of the second center bus bar are lined up in the component short side direction, and the second outgoing line of the other end portion of the second center bus bar, the first outgoing line of the third lead bus bar, the second outgoing line of the third center bus bar, and the first outgoing line of the fourth lead bus bar are lined up in the component short side direction.

According to the photovoltaic module of the embodiment of the present invention, the two battery strings arranged along the short side direction of the module are connected in parallel to form the battery string set, the two battery string sets arranged along the long side direction of the module are connected in series to form the battery string set unit, and each battery string set is connected in parallel with the bypass diode in the reverse direction, compared with the conventional circuit design, the battery sheet connecting circuit of the present invention can increase the module efficiency and satisfy the requirement of the high power module, and is favorable for matching a plurality of bypass diodes, thereby satisfying the requirement of the diodes on the module circuit and effectively reducing the hot spot effect, meanwhile, the module circuit of the present invention sets a specific wire outlet mode, namely, the first lead-out wire is arranged on each lead-out bus bar, and one end of the first lead-out wire extends towards the direction far away from the plane of the battery sheet, and all be provided with the second lead-out wire with the tip of every center bus bar, and the second lead-out wire orientation is kept away from the planar direction extension in battery piece place, thereby can reduce the planar occupation space at battery piece place of bypass diode, make the subassembly design compacter, improve the subassembly integration level, and be a word along subassembly minor face direction through the second lead-out wire with first lead-out wire on the lead wire bus bar and center bus bar and open, do benefit to the opening size that reduces the subassembly backplate, reduce the steam transmissivity, promote solar PV modules's reliability and life.

In some embodiments, each of the first lead-out lines is formed by bending a portion of the corresponding lead bus bar in a direction away from a plane in which the battery cell is located; each second lead-out wire is formed by bending a part of the corresponding central bus bar towards a direction away from the plane of the battery piece.

In some embodiments, the second outlet comprises: one end of the first leading-out section is electrically connected with the corresponding central bus bar; the second leading-out section is connected with the first leading-out section, and the second leading-out section is perpendicular to the first leading-out section.

In some embodiments, the photovoltaic module further comprises a back plate, and a first open line and a second open line which extend in parallel to the short side direction of the module are arranged on the back plate; the first outgoing line of the first lead bus bar, the second outgoing line of the first center bus bar, the first outgoing line of the second lead bus bar, and the second outgoing line of one end of the second center bus bar respectively pass through the first open line to protrude out of the surface of the back plate; the second outgoing line of the other end of the second center bus bar, the first outgoing line of the third lead bus bar, the second outgoing line of the third center bus bar, and the first outgoing line of the fourth lead bus bar pass through the second open line to protrude out of the surface of the back plate, respectively.

In some embodiments, the width of the open line ranges from 10mm to 40 mm.

In some embodiments, the photovoltaic module further comprises: the first junction box comprises a first base, a first bonding pad, a second bonding pad, a third bonding pad and a fourth bonding pad, wherein the first bonding pad, the second bonding pad, the third bonding pad and the fourth bonding pad are arranged on the first base along the length direction of the base, a first outgoing line of the first lead bus bar is electrically connected with the first bonding pad, a second outgoing line of the first central bus bar is electrically connected with the second bonding pad, a first outgoing line of the second lead bus bar is electrically connected with the third bonding pad, and a second outgoing line of one end portion of the second central bus bar is electrically connected with the fourth bonding pad.

In some embodiments, a first electrical connection sheet, a second electrical connection sheet, a third electrical connection sheet and a fourth electrical connection sheet are further disposed in the first junction box, the first pad is disposed on the first electrical connection sheet, the second pad is disposed on the second electrical connection sheet, the third pad is disposed on the third electrical connection sheet, and the fourth pad is disposed on the fourth electrical connection sheet; the first bypass diode is electrically connected with the first electric connection sheet and the second electric connection sheet respectively, the second bypass diode is electrically connected with the second electric connection sheet and the third electric connection sheet respectively, and the fourth bypass diode is electrically connected with the third electric connection sheet and the fourth electric connection sheet respectively.

In some embodiments, a first lead end is further disposed in the first junction box, and the first lead end is electrically connected to the first electrical connection sheet and used for leading out a first electrode wire of the photovoltaic module.

In some embodiments, the photovoltaic module further comprises: the second junction box comprises a second base, a fifth bonding pad, a sixth bonding pad, a seventh bonding pad and an eighth bonding pad, the fifth bonding pad, the sixth bonding pad, the seventh bonding pad and the eighth bonding pad are arranged on the second base along the length direction of the base, a second outgoing line at the other end part of the second central bus bar is electrically connected with the fifth bonding pad, a first outgoing line of the third lead bus bar is electrically connected with the sixth bonding pad, a second outgoing line of the third central bus bar is electrically connected with the seventh bonding pad, and a first outgoing line of the fourth lead bus bar is electrically connected with the eighth bonding pad.

In some embodiments, a fifth electrical connection sheet, a sixth electrical connection sheet, a seventh electrical connection sheet and an eighth electrical connection sheet are further disposed in the second junction box, the fifth pad is disposed on the fifth electrical connection sheet, the sixth pad is disposed on the sixth electrical connection sheet, the seventh pad is disposed on the seventh electrical connection sheet, and the eighth pad is disposed on the eighth electrical connection sheet; the third bypass diode is electrically connected with the fifth electric connection sheet and the sixth electric connection sheet respectively, the fifth bypass diode is electrically connected with the sixth electric connection sheet and the seventh electric connection sheet respectively, and the sixth bypass diode is electrically connected with the seventh electric connection sheet and the eighth electric connection sheet respectively.

In some embodiments, a second lead end is further disposed in the second junction box, and the second lead end is electrically connected to the eighth electrical connection sheet and used for leading out a second electrode wire of the photovoltaic module.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is an equivalent circuit diagram of a photovoltaic module according to an embodiment of the present invention;

fig. 2 is an equivalent circuit diagram of a photovoltaic module according to another embodiment of the present invention;

fig. 3 is a schematic diagram of a bus bar outgoing line mode of a photovoltaic module according to an embodiment of the present invention;

fig. 4 is a schematic diagram of a bus bar outgoing line mode of a photovoltaic module according to an embodiment of the present invention;

fig. 5 is an open-line schematic view of a photovoltaic module backsheet according to an embodiment of the present invention;

fig. 6 is a schematic layout diagram of a photovoltaic module according to an embodiment of the present invention;

fig. 7 is a schematic view of a first junction box according to an embodiment of the invention;

fig. 8 is a schematic diagram of a second junction box according to an embodiment of the invention.

Reference numerals:

a first battery string unit 10; a second battery string unit 20; a third battery string unit 30; a first battery string group 1; a second battery string group 2; a third battery string group 3; a fourth battery string group 4; a fifth battery string group 5; a sixth battery string group 6; a first battery string 7; a second battery string 8;

a first bypass diode 11; a second bypass diode 12; a third bypass diode 13; a fourth bypass diode 14; a fifth bypass diode 15; a sixth bypass diode 16; a first lead bus bar 21; a second lead bus bar 22; a third lead bus bar 23; a fourth lead bus bar 24; a first center bus bar 31; a second center bus bar 32; a third center bus bar 33;

a first outgoing line 17; a second outlet 18; a first open wire 25; a second open line 26;

a back plate 40; a battery piece 9;

a first junction box 50; a first base 27; a first lead terminal 28; a first pad 41; the second pad 42; the third pad 43; a fourth pad 44; a first electrical connection sheet 51; a second electrical connection tab 52; a third electrical connection tab 53; a fourth electrical connection tab 54;

a first junction box 60; a second base 34; a second lead terminal 35; a fifth pad 45; a sixth pad 46; a seventh pad 47; an eighth pad 48; a fifth electrical connection tab 55; a sixth electrical connection tab 56; a seventh electric connection piece 57; an eighth electrical connection pad 58.

Detailed Description

Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.

In order to solve the above problem, the photovoltaic module according to the embodiment of the present invention is described below with reference to the drawings, and the photovoltaic module can reduce the vapor transmittance and improve the reliability and the service life of the solar photovoltaic module.

As shown in fig. 1, the equivalent circuit diagram of the photovoltaic module provided by the embodiment of the present invention, wherein the module panel includes a first battery string unit 10, a second battery string unit 20, and a third battery string unit 30 connected in series and arranged along the short side direction of the module. Specifically, the first cell string unit 10 includes a first cell string 1 and a second cell string 2 that are connected in series and arranged in the long side direction of the module, the second cell string unit 20 includes a third cell string 3 and a fourth cell string 4 that are connected in series and arranged in the long side direction of the module, and the third cell string unit 30 includes a fifth cell string 5 and a sixth cell string 6 that are connected in series and arranged in the long side direction of the module.

Each battery string group comprises two first battery strings 7 and two second battery strings 8 which are connected in parallel and arranged along the short side direction of the assembly, and each battery string comprises battery pieces which are equal in number and connected in series.

It should be noted that, the structure of the photovoltaic module shown in fig. 1 enables all the cells to be regularly and tightly arranged, which facilitates the electrical connection between the adjacent cells on the one hand, and is beneficial to reduce the occupied space of the whole photovoltaic module on the other hand.

Further, each battery string group in the present invention is provided with a bypass diode in reverse parallel for realizing a bypass function when the battery string is shielded by a shadow to prevent the component from being damaged by overheating, specifically, as shown in fig. 2, a first lead bus bar 21 extending in parallel to the long side direction of the component is provided between the first battery string group 1 and the third battery string group 3, the first battery string group 1 is connected in reverse parallel with the first bypass diode 11 through the first lead bus bar 21, a second lead bus bar 22 extending in parallel to the long side direction of the component is provided between the second battery string group 2 and the fourth battery string group 4, the second battery string group 2 is connected in reverse parallel with the second bypass diode 12 through the second lead bus bar 22, the fourth battery string group 4 is connected in reverse parallel with the fourth bypass diode 14 through the second lead bus bar 22, a third lead bus bar 23 extending in parallel to the long side direction of the component is provided between the third battery string group 3 and the fifth battery string group 5, the third battery string group 3 is reversely connected in parallel with the third bypass diode 13 through the third lead bus bar 23, the fifth battery string group 5 is reversely connected in parallel with the fifth bypass diode 15 through the third lead bus bar 23, a fourth lead bus bar 24 extending in parallel with the long side direction of the module is arranged between the fourth battery string group 4 and the sixth battery string group 6, and the sixth battery string group 6 is reversely connected in parallel with the sixth bypass diode 16 through the fourth lead bus bar 24.

Referring to fig. 3 or 4, each lead bus bar is provided with a first outgoing line 17, one end of each first outgoing line 17 is electrically connected with the lead bus bar, and the other end of each first outgoing line 17 extends towards a direction away from the plane where the battery piece is located, that is, the first outgoing line 17 is perpendicular to the lead bus bar, that is, perpendicular to the plane where the battery piece is located, and the lead bus bar is electrically connected with the bypass diode through the first outgoing line 17, so that the occupied space of the bypass diode arranged between the battery piece arrays can be saved, the assembly design is more compact, and the assembly integration level is improved.

And, as shown in fig. 2, a first center bus bar 31 extending parallel to the short side direction of the module is provided between the first cell string group 1 and the second cell string group 2, a first bypass diode 11 is electrically connected between the end of the first center bus bar 31 and the first lead bus bar 21, a second bypass diode 12 is electrically connected between the end of the first center bus bar 31 and the second lead bus bar 22, a second center bus bar 32 extending parallel to the short side direction of the module is provided between the third cell string group 3 and the fourth cell string group 4, a fourth bypass diode 14 is electrically connected between one end of the second center bus bar 32 and the second lead bus bar 22, a third bypass diode 13 is electrically connected between the other end of the second center bus bar 32 and the third lead bus bar 23, a third center bus bar 33 extending parallel to the short side direction of the module is provided between the fifth cell string group 5 and the sixth cell string group 6, a fifth bypass diode 15 is electrically connected between the end of the third center bus bar 33 and the third lead bus bar 23, and a sixth bypass diode 16 is electrically connected between the end of the third center bus bar 33 and the fourth lead bus bar 24.

Referring to fig. 3 or 4, the end of each central bus bar is provided with a second outgoing line 18, one end of each second outgoing line 18 is electrically connected with the corresponding central bus bar, and the other end extends towards the direction away from the plane where the battery piece is located, that is, the second outgoing line 18 is perpendicular to the central bus bar, that is, perpendicular to the plane where the battery piece is located, and the central bus bar is electrically connected with the bypass diode through the second outgoing line 18, so that the occupied space of the bypass diode arranged between the battery piece arrays can be saved, the assembly design is more compact, and the assembly integration level is improved.

In short, the utility model discloses a first lead-out wire 17 that sets up on the lead wire busbar, and the second lead-out wire 18 that central busbar tip set up, be used for being connected with bypass diode electricity, corresponding lead-out wire is drawn forth in the one end design that the busbar links to each other with bypass diode promptly, and make the plane at lead-out wire perpendicular to battery piece place, thereby through adopting this mode of being qualified for the next round of competitions, can realize being connected with bypass diode's electricity in the planar outside in battery piece place, and need not to set up corresponding clearance in the plane at battery piece place, reduce bypass diode at the planar occupation space in battery piece place, make the subassembly design compacter, improve the subassembly integrated level.

Further, as shown in fig. 3, the first lead-out wire 17 of the first lead bus bar 21, the second lead-out wire 18 of the first center bus bar 31, the first lead-out wire 17 of the second lead bus bar 22, and the second lead-out wire 18 of one end portion of the second center bus bar 32 are arranged in line in the module short side direction, and, as shown in fig. 4, the second lead-out wire 18 of the other end portion of the second center bus bar 32, the first lead-out wire 17 of the third lead bus bar 23, the second lead-out wire 18 of the third center bus bar 33, and the first lead-out wire 17 of the fourth lead bus bar 24 are arranged in line in the module short side direction. Consequently, compare in the trompil shape that adopts the subassembly backplate such as polygon or circular, the utility model discloses a photovoltaic module design is the lead-out wire of busbar along subassembly minor face direction and is a word row and opens, i.e. the opening shape that makes the subassembly backplate is a style of calligraphy to can reduce the opening size of subassembly backplate, reduce the steam transmissivity, reduce the erosion to the panel, promote solar PV modules's reliability and life.

Further, based on the utility model discloses a circuit design mode through adopting six bypass diodes, can be promoting battery piece efficiency to and when the battery piece number increases, satisfy the requirement of bypass diode to the subassembly circuit, consequently, compare in conventional subassembly circuit design, adopt the utility model discloses a subassembly circuit both can be applicable to the high power subassembly, can arrange a plurality of bypass diodes again, effectively reduces subassembly hot spot temperature.

It should be noted that, because the conventional diode is limited by its reverse withstand voltage capability, the number of battery pieces that can be protected at most does not exceed 24, and the number of battery pieces in each battery string needs to be matched according to the bypass diode, so as to avoid the situation that the voltage of the battery pieces in the battery string is too high due to too many battery pieces, which causes the risk of breakdown of the bypass diode.

Meanwhile, as shown in fig. 2, the battery pieces of all the battery strings form a battery piece array, the outgoing lines of the bus bars are all led out at the middle position of the battery piece array, and the six bypass diodes are all electrically connected through the outgoing lines to protect the photovoltaic module, namely, the six bypass diodes are all located at the middle position of the module, so that the integration level of the module is improved, and the bypass diodes are conveniently integrated in the same junction box, for example, three diodes can be integrated in a single junction box, and the single module uses two sets of junction boxes, so that the number of the junction boxes can be reduced, and the cost of the module can be reduced.

According to the photovoltaic module of the embodiment of the present invention, the two battery strings arranged along the short side direction of the module are connected in parallel to form the battery string set, the two battery string sets arranged along the long side direction of the module are connected in series to form the battery string set unit, and each battery string set is connected in parallel with the bypass diode in the reverse direction, compared with the conventional circuit design, the battery sheet connecting circuit of the present invention can increase the module efficiency and satisfy the requirement of the high power module, and is favorable for matching a plurality of bypass diodes, thereby satisfying the requirement of the diodes on the module circuit and effectively reducing the hot spot effect, meanwhile, the module circuit of the present invention sets a specific wire outlet mode, namely, the first lead-out wire 17 is arranged on each lead-out bus bar, and one end of the first lead-out wire 17 extends towards the direction far away from the plane of the battery sheet, and all be provided with second lead-out wire 18 with the tip of every center bus bar, and second lead-out wire 18 extends towards the planar direction of keeping away from the battery piece place, thereby can reduce the planar occupation space at the battery piece place of bypass diode, make the subassembly design compacter, improve the subassembly integration level, and be a word row along subassembly minor face direction through first lead-out wire 17 with the first lead-out wire 18 of center bus bar on the lead wire bus bar, do benefit to the opening size that reduces the subassembly backplate, reduce the steam transmissivity, promote solar PV modules's reliability and life.

In the embodiment, each of the first outgoing lines 17 may be formed by bending a portion of the corresponding lead bus bar in a direction away from the plane in which the battery cells are located, and each of the second outgoing lines 18 may be formed by bending a portion of the corresponding center bus bar in a direction away from the plane in which the battery cells are located.

Further, the second lead-out wire 18 includes a first lead-out section and a second lead-out section, as shown in fig. 3 or 4, one end of the first lead-out section is electrically connected to the corresponding center bus bar, the second lead-out section and the first lead-out section are connected to each other, and the second lead-out section and the first lead-out section are perpendicular to each other.

In an embodiment, the utility model discloses a photovoltaic module still includes backplate 40, wherein, is directed to the utility model discloses a lead-out wire is the mode of drawing forth of a style of calligraphy row, is provided with the first line 25 and the second line 26 that opens that extend on a parallel with subassembly minor face direction on backplate 40, as shown in fig. 5 to draw forth the lead-out wire of busbar in the department of opening the line.

Further, as shown in fig. 6, which is a layout diagram of the photovoltaic module according to the embodiment of the present invention, the module circuit according to the embodiment of the present invention is formed by connecting a plurality of battery pieces 9 in series and parallel and arranging them as shown in fig. 6. Wherein the first outgoing line 17 of the first lead bus bar 21, the second outgoing line 18 of the first center bus bar 31, the first outgoing line 17 of the second lead bus bar 22, and the second outgoing line 18 of one end of the second center bus bar 32 respectively pass through the first open line 25 to protrude out of the surface of the back plate 40, and the second outgoing line 18 of the other end of the second center bus bar 32, the first outgoing line 17 of the third lead bus bar 23, the second outgoing line 18 of the third center bus bar 33, and the first outgoing line 17 of the fourth lead bus bar 24 respectively pass through the second open line 26 to protrude out of the surface of the back plate 40.

Wherein, the utility model discloses the width value range of opening of subassembly backplate is 10mm-40mm, for example can be 10mm or 11mm or 30mm etc. specifically can set up according to actual conditions, and this embodiment does not do the restriction to this.

In the embodiment, the bus bar is partially overlapped with the battery piece array in the vertical direction of the plane of the battery piece array, so when the bus bar is arranged, an insulating layer is arranged between the bus bar and the battery piece array in at least the overlapping area to avoid the situations of short circuit, electric leakage and the like. It can be understood that, for convenience of preparation, the insulating layer may also be disposed in the surrounding area at the same time, or other ways capable of achieving insulation between the jumper and the cell, which is not specifically limited in this embodiment as long as the normal operation of the photovoltaic module is not affected.

In the embodiment, the insulating layer can be a reflective film, so that the insulating effect can be achieved, light reflection can be performed, the performance of a photovoltaic module device can be improved, and meanwhile, on the premise that the insulating effect can be achieved, the thickness of the insulating layer is reduced as much as possible, and lamination cracking is avoided.

In an embodiment, the bus bar may include a center conductor and a peripheral insulation layer wrapped outside the center conductor. It should be noted that when the lead bus bar with the structure is in contact with other lead structures, the peripheral insulating layer can play an insulating role, and an additional insulating layer is not needed, so that the photovoltaic module structure and the process are simplified.

In the embodiment, the bypass diode is arranged in the junction box, and the utility model discloses be the extraction mode that the style of calligraphy was arranged to the lead-out wire, be provided with the special junction box of matching to correspond with the lead-out wire of busbar. Wherein, the utility model discloses a six bypass diodes to with wherein three bypass diode integration in same terminal box, whole subassembly uses two sets of terminal boxes.

In an embodiment, the photovoltaic module of the present invention includes a first junction box 50 and a second junction box 60.

Specifically, as shown in fig. 7, the first junction box 50 includes a first chassis 27 and a first pad 41, a second pad 42, a third pad 43, and a fourth pad 44 provided on the first chassis 27 and arranged in a longitudinal direction of the chassis, a first lead line 17 of the first lead bus bar 21 is electrically connected to the first pad 41, a second lead line 18 of the first center bus bar 31 is electrically connected to the second pad 42, the first lead line 17 of the second lead bus bar 22 is electrically connected to the third pad 43, and the second lead line 18 of one end portion of the second center bus bar 32 is electrically connected to the fourth pad 44.

Meanwhile, a first electrical connection sheet 51, a second electrical connection sheet 52, a third electrical connection sheet 53 and a fourth electrical connection sheet 54 are further arranged in the first junction box 50, the first pad 41 is arranged on the first electrical connection sheet 51, the second pad 42 is arranged on the second electrical connection sheet 52, the third pad 43 is arranged on the third electrical connection sheet 53, the fourth pad 44 is arranged on the fourth electrical connection sheet 54, the first bypass diode 11 is electrically connected with the first electrical connection sheet 51 and the second electrical connection sheet 52 respectively, the second bypass diode 12 is electrically connected with the second electrical connection sheet 52 and the third electrical connection sheet 53 respectively, and the fourth bypass diode 14 is electrically connected with the third electrical connection sheet 53 and the fourth electrical connection sheet 54 respectively. And a first lead end 28 is further arranged in the first junction box 50, and is electrically connected with the first electric connecting sheet 51 and used for leading out a first electrode wire of the photovoltaic module.

As shown in fig. 8, the second junction box 60 includes a second chassis 34, and fifth, sixth, seventh, and

eighth pads

45, 46, 47, and 48 provided on the second chassis 34 and arranged in the longitudinal direction of the chassis, the second lead line 18 of the other end of the second center bus bar 32 is electrically connected to the fifth pad 45, the first lead line 17 of the third lead bus bar 23 is electrically connected to the sixth pad 46, the second lead line 18 of the third center bus bar 33 is electrically connected to the seventh pad 47, and the first lead line 17 of the fourth lead bus bar 24 is electrically connected to the eighth pad 48.

Meanwhile, a fifth electrical connection sheet 55, a sixth electrical connection sheet 56, a seventh electrical connection sheet 57 and an eighth electrical connection sheet 58 are further arranged in the second junction box 60, a fifth pad 45 is arranged on the fifth electrical connection sheet 55, a sixth pad 46 is arranged on the sixth electrical connection sheet 56, a seventh pad 47 is arranged on the seventh electrical connection sheet 57, an eighth pad 48 is arranged on the eighth electrical connection sheet 58, the third bypass diode 13 is electrically connected with the fifth electrical connection sheet 55 and the sixth electrical connection sheet 56 respectively, the fifth bypass diode 15 is electrically connected with the sixth electrical connection sheet 56 and the seventh electrical connection sheet 57 respectively, and the sixth bypass diode 16 is electrically connected with the seventh electrical connection sheet 57 and the eighth electrical connection sheet 58 respectively. And a second lead end 35 is further arranged in the second junction box 60, and is electrically connected with the eighth electric connecting sheet 58 for leading out a second electrode wire of the photovoltaic module.

In summary, with the improvement of the efficiency of the battery plate and the increase of the number of the battery plates, based on the circuit design of the assembly of the utility model, the efficiency of the assembly can be improved, the requirement of a high-power assembly can be met, a plurality of bypass diodes can be matched, the requirement of the diodes on the circuit of the assembly can be met, the hot spot temperature of the assembly can be effectively reduced, meanwhile, compared with the opening shape of the assembly back plate adopting a polygon or a circle, the assembly of the utility model adopts a specific wire outlet mode, namely two linear openings are arranged on the back surface of the assembly, and the leading-out wires of four bus bars are led out from each opening, thereby reducing the opening size of the assembly back plate, reducing the vapor transmission rate, reducing the erosion to the battery plate, improving the reliability and the service life of the solar photovoltaic assembly, improving the efficiency of the assembly, and being convenient for realizing the electric connection with the bypass, the occupied space of the bypass diode on the plane where the battery piece is located is reduced, the assembly design is more compact, the assembly integration level is improved, the usage of the junction box can be reduced by matching the special junction box design, and the assembly cost is reduced.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A photovoltaic module, comprising:

the battery pack comprises a first battery string group unit, a second battery string group unit and a third battery string group unit which are connected in series and arranged along the short side direction of the assembly, wherein the first battery string group unit comprises a first battery string group and a second battery string group which are connected in series and arranged along the long side direction of the assembly, the second battery string group unit comprises a third battery string group and a fourth battery string group which are connected in series and arranged along the long side direction of the assembly, the third battery string group unit comprises a fifth battery string group and a sixth battery string group which are connected in series and arranged along the long side direction of the assembly, each battery string group comprises a first battery string and a second battery string which are connected in parallel and arranged along the short side direction of the assembly, and each battery string comprises battery pieces which are equal in number and connected in series;

2. The photovoltaic module of claim 1,

each first lead wire is formed by bending a part of the corresponding lead bus bar towards a direction away from the plane of the battery piece;

each second lead-out wire is formed by bending a part of the corresponding central bus bar towards a direction away from the plane of the battery piece.

3. The photovoltaic module of claim 1, wherein the second outlet comprises:

one end of the first leading-out section is electrically connected with the corresponding central bus bar;

the second leading-out section is connected with the first leading-out section, and the second leading-out section is perpendicular to the first leading-out section.

4. The photovoltaic module according to claim 1, further comprising a back sheet on which a first open line and a second open line extending parallel to a short side direction of the module are provided;

the first outgoing line of the first lead bus bar, the second outgoing line of the first center bus bar, the first outgoing line of the second lead bus bar, and the second outgoing line of one end of the second center bus bar respectively pass through the first open line to protrude out of the surface of the back plate;

the second outgoing line of the other end of the second center bus bar, the first outgoing line of the third lead bus bar, the second outgoing line of the third center bus bar, and the first outgoing line of the fourth lead bus bar pass through the second open line to protrude out of the surface of the back plate, respectively.

5. The photovoltaic module of claim 4, wherein the width of the open line ranges from 10mm to 40 mm.

6. The photovoltaic module of claim 1, further comprising:

the first junction box comprises a first base, a first bonding pad, a second bonding pad, a third bonding pad and a fourth bonding pad, wherein the first bonding pad, the second bonding pad, the third bonding pad and the fourth bonding pad are arranged on the first base along the length direction of the base, a first outgoing line of the first lead bus bar is electrically connected with the first bonding pad, a second outgoing line of the first central bus bar is electrically connected with the second bonding pad, a first outgoing line of the second lead bus bar is electrically connected with the third bonding pad, and a second outgoing line of one end portion of the second central bus bar is electrically connected with the fourth bonding pad.

7. The photovoltaic module of claim 6,

the first wiring box is internally provided with a first electric connecting sheet, a second electric connecting sheet, a third electric connecting sheet and a fourth electric connecting sheet, the first welding disc is arranged on the first electric connecting sheet, the second welding disc is arranged on the second electric connecting sheet, the third welding disc is arranged on the third electric connecting sheet, and the fourth welding disc is arranged on the fourth electric connecting sheet;

the first bypass diode is electrically connected with the first electric connection sheet and the second electric connection sheet respectively, the second bypass diode is electrically connected with the second electric connection sheet and the third electric connection sheet respectively, and the fourth bypass diode is electrically connected with the third electric connection sheet and the fourth electric connection sheet respectively.

8. The photovoltaic module according to claim 7, wherein a first lead terminal is further disposed in the first junction box, and the first lead terminal is electrically connected to the first electrical connection sheet for leading out a first electrode wire of the photovoltaic module.

9. The photovoltaic module of claim 1 or 6, further comprising:

the second junction box comprises a second base, a fifth bonding pad, a sixth bonding pad, a seventh bonding pad and an eighth bonding pad, the fifth bonding pad, the sixth bonding pad, the seventh bonding pad and the eighth bonding pad are arranged on the second base along the length direction of the base, a second outgoing line at the other end part of the second central bus bar is electrically connected with the fifth bonding pad, a first outgoing line of the third lead bus bar is electrically connected with the sixth bonding pad, a second outgoing line of the third central bus bar is electrically connected with the seventh bonding pad, and a first outgoing line of the fourth lead bus bar is electrically connected with the eighth bonding pad.

10. The photovoltaic module of claim 9,

a fifth electric connecting sheet, a sixth electric connecting sheet, a seventh electric connecting sheet and an eighth electric connecting sheet are further arranged in the second junction box, the fifth welding disc is arranged on the fifth electric connecting sheet, the sixth welding disc is arranged on the sixth electric connecting sheet, the seventh welding disc is arranged on the seventh electric connecting sheet, and the eighth welding disc is arranged on the eighth electric connecting sheet;

the third bypass diode is electrically connected with the fifth electric connection sheet and the sixth electric connection sheet respectively, the fifth bypass diode is electrically connected with the sixth electric connection sheet and the seventh electric connection sheet respectively, and the sixth bypass diode is electrically connected with the seventh electric connection sheet and the eighth electric connection sheet respectively.

11. The photovoltaic module according to claim 10, wherein a second lead terminal is further disposed in the second junction box, and the second lead terminal is electrically connected to the eighth electrical connecting sheet for leading out a second electrode wire of the photovoltaic module.