A multi-faceted photovoltaic assembly

Abstract

The utility model relates to photovoltaic manufacturing field especially is related to a kind of multi-slice photovoltaic module, including the front cover, cell layer and back cover that are sequentially laminated;Cell layer includes upper cell subarea and lower cell subarea distributed along first direction;The upper cell subarea and the lower cell subarea all include multiple cell units;The cell unit includes multiple battery strings;Current main lead is provided between the upper cell subarea and the lower cell subarea and extends along the second direction;The back cover includes first through-hole and second through-hole;The cell unit includes first polarity busbar and jumper wire;The jumper wire is set to the back side of the back cover;The first polarity busbar is connected with the jumper wire by the first through-hole;The jumper wire extends to the second through-hole, and is electrically connected with the current main lead by the second through-hole.The utility model improves the design freedom of component layout, reduces process difficulty, reduces the cost of component.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic manufacturing, and in particular to a multi-segment photovoltaic module. Background Technology

[0002] With the continuous development of the solar photovoltaic industry, the market demand for photovoltaic module power is increasing. How to improve the power of photovoltaic modules while reducing module costs has been a key technical issue for researchers. Therefore, many researchers have focused on increasing the size of solar cells by combining them into slabs. However, conventional solar cells on the market are simply slab-based without optimizing the internal circuitry. As the cell size increases, the current will inevitably increase, leading to higher internal electrical losses in the photovoltaic module and ultimately reducing its power output.

[0003] The industry is simultaneously developing multi-cell module products to reduce internal series resistance losses through multi-cell design. However, in multi-cell layouts, since the connection nodes between cell strings are not necessarily tightly attached, jumpers need to be added to the module's laminate. These jumpers extend along the long axis of the cell string. Currently, there are two ways to set the jumpers: one is to place the jumpers in the gaps between adjacent cell strings. This method requires increasing the spacing between cell strings to reserve space for the jumpers, reducing the area of ​​the cells in the module and adding many restrictions to the manufacturing process and layout, making the process difficult; the other is to directly overlap the jumpers with the cell strings, but this leads to uneven thickness within the cell string area, resulting in uneven stress on the cells during lamination and increasing the microcrack rate. These two problems have been hindering the industrial application of multi-cell modules.

[0004] Therefore, how to improve the layout design freedom after adding jumpers and reduce the microcrack rate of cells in the module while ensuring low internal loss of photovoltaic modules using multi-segment module technology is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide a multi-segment photovoltaic module to solve the problems of high microcrack rate and low layout design freedom of existing multi-segment modules.

[0006] To solve the above-mentioned technical problems, this utility model provides a multi-segment photovoltaic module, including a front cover plate, a battery layer and a back cover plate stacked in sequence;

[0007] The battery layer includes an upper battery section and a lower battery section distributed along a first direction;

[0008] Both the upper battery partition and the lower battery partition include multiple battery cells arranged along the second direction; each battery cell includes multiple battery strings whose long axis is arranged along the first direction; the first direction is perpendicular to the second direction.

[0009] A main current lead extending along the second direction is provided between the upper battery partition and the lower battery partition;

[0010] The back cover plate includes a first through hole and a second through hole; the battery cell includes a first polarity busbar and a jumper wire; the first polarity busbar is the busbar of the battery cell away from the main current lead; the jumper wire is disposed on the back side of the back cover plate; the back side is the side of the back cover plate away from the battery layer;

[0011] The first through hole is provided corresponding to the first polarity bus bar, and the second through hole is provided corresponding to the lead-out position of the main current lead.

[0012] The first polarity busbar is connected to the jumper wire through the first through hole; the jumper wire extends to the second through hole and is electrically connected to the main current lead through the second through hole.

[0013] Optionally, in the multi-segment photovoltaic module, multiple cells in the battery cell are connected in series and parallel.

[0014] Optionally, the multi-segment photovoltaic module further includes a first junction box and a second junction box;

[0015] The first junction box is provided corresponding to the first through hole, and the first polarity bus bar passes through the first through hole and is connected to the jumper wire inside the first junction box;

[0016] The second junction box is provided corresponding to the second through hole, and the main current lead passes through the end of the second through hole and is connected to the jumper wire inside the second junction box.

[0017] Optionally, in the multi-segment photovoltaic module, the main current lead is a segmented lead, comprising multiple lead segments;

[0018] The adjacent lead segments are electrically connected through corresponding second junction boxes.

[0019] Optionally, in the multi-segment photovoltaic module, the second junction box includes a positive terminal junction box;

[0020] The positive terminal box is located at the positive end of the main current lead;

[0021] The positive terminal box includes a first bypass diode, which is reverse biased in the main current lead.

[0022] Optionally, in the multi-segment photovoltaic module, the two battery cells closest to the negative terminal of the main current lead in the upper battery section or the lower battery section are respectively designated as the first negative battery cell and the second negative battery cell.

[0023] The first polarity busbar of the first negative electrode battery unit and the first polarity busbar of the second negative electrode battery unit are electrically connected through the first junction box, so that the first negative electrode battery unit and the second negative electrode battery unit are connected in series.

[0024] Optionally, in the multi-segment photovoltaic module, the second junction box includes a negative terminal junction box;

[0025] The negative terminal box is electrically connected to the first terminal box between the first polarity busbar of the first negative terminal battery unit and the first polarity busbar of the second negative terminal battery unit via the jumper wire;

[0026] The negative terminal box includes two second bypass diodes connected in series, and the second bypass diodes are reverse biased in the main current lead;

[0027] The connection point between the jumper and the negative terminal box is located between the two second bypass diodes.

[0028] Optionally, in the multi-segment photovoltaic module, the first junction box and the corresponding second junction box are integrated into one unit.

[0029] Optionally, the multi-segment photovoltaic module also includes a clip;

[0030] The buckle secures the jumper to the back cover.

[0031] The multi-segment photovoltaic module provided by this utility model includes a front cover plate, a battery layer, and a back cover plate stacked sequentially. The battery layer includes an upper battery section and a lower battery section distributed along a first direction. Each upper battery section and the lower battery section includes multiple battery cells arranged along a second direction. Each battery cell includes multiple battery strings with their long axis arranged along the first direction. The first direction is perpendicular to the second direction. A main current lead extending along the second direction is provided between the upper battery section and the lower battery section. The back cover plate includes a first through hole and a second through hole. Each battery cell includes a first polarity bus bar and a jumper wire. The first polarity bus bar is the bus bar of the battery cell away from the main current lead wire. The jumper wire is provided on the back side of the back cover plate. The back side is the side of the back cover plate away from the battery layer. The first through hole is correspondingly provided with the first polarity bus bar, and the second through hole is correspondingly provided with the lead-out position of the main current lead wire. The first polarity bus bar and the jumper wire are connected through the first through hole. The jumper wire extends to the second through hole and is electrically connected to the main current lead wire through the second through hole. This invention features a hole in the back cover plate, allowing jumpers to bypass the laminated structure of the photovoltaic module and instead establish electrical connections between different cell strings outside the laminated structure. This avoids microcracks in the cells caused by surface unevenness during lamination and eliminates the need to reserve space between cell strings for jumpers, thereby greatly increasing the design freedom of the module layout and reducing manufacturing complexity. Furthermore, placing the jumpers outside the laminated structure significantly relaxes the manufacturing requirements for them, allowing the use of base metal wires and reducing module costs. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 A cross-sectional structural schematic diagram of a specific embodiment of the multi-segment photovoltaic module provided by this utility model;

[0034] Figures 2 to 5 A partial structural schematic diagram of a specific embodiment of the multi-segment photovoltaic module provided by this utility model;

[0035] Figure 6 A cross-sectional structural schematic diagram of another specific embodiment of the multi-segment photovoltaic module provided by this utility model;

[0036] Figure 7A cross-sectional structural schematic diagram of another specific embodiment of the multi-segment photovoltaic module provided by this utility model.

[0037] Figure label:

[0038] 100 - Front cover; 210 - Upper battery compartment; 220 - Lower battery compartment; 230 - Main current lead; 201 - Battery cell; 300 - Rear cover; 310 - First through hole; 320 - Second through hole; 400 - Jumper wire; 410 - First junction box; 420 - Second junction box; 420A - First bypass diode; 420B - Second bypass diode; 421 - Positive junction box; 422 - Negative junction box; 430 - Snap-on. Detailed Implementation

[0039] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] The core of this utility model is to provide a multi-segment photovoltaic module, the structural schematic diagram of one specific embodiment of which is shown below. Figure 1 and Figure 2 As shown, this is referred to as Specific Implementation Method 1, which includes a front cover plate 100, a battery layer and a back cover plate 300 stacked in sequence.

[0041] The battery layer includes an upper battery partition 210 and a lower battery partition 220 distributed along a first direction;

[0042] Both the upper battery partition 210 and the lower battery partition 220 include a plurality of battery cells 201 arranged along the second direction; each battery cell 201 includes a battery string whose long axis is arranged along the first direction; the first direction is perpendicular to the second direction.

[0043] A main current lead 230 extending in the second direction is provided between the upper battery partition 210 and the lower battery partition 220.

[0044] The back cover plate 300 includes a first through hole 310 and a second through hole 320; the battery cell 201 includes a first polarity busbar and a jumper 400; the first polarity busbar is the busbar of the battery cell 201 away from the main current lead 230; the jumper 400 is disposed on the back side of the back cover plate 300; the back side is the side of the back cover plate 300 away from the battery layer;

[0045] The first through hole 310 is provided corresponding to the first polarity busbar, and the second through hole 320 is provided corresponding to the lead-out position of the main current lead 230;

[0046] The first polarity busbar is connected to the jumper 400 through the first through hole 310; the jumper 400 extends to the second through hole 320 and is electrically connected to the main current lead 230 through the second through hole 320.

[0047] Figure 1 This is a cross-sectional view of the multi-segment photovoltaic module. Figure 2 for Figure 1 A structural schematic diagram of the corresponding battery layer. A structural schematic diagram of the back cover 300 is shown below. Figure 3 As shown, Figure 3 and Figure 1 Correspondingly, the first through hole 310 and the second through hole 320 are provided. Of course, the positions of these two types of through holes can be varied depending on the arrangement of the battery cells 201, and this utility model does not impose any limitations on them. Furthermore, not all the first polarity busbars of the battery cells 201 are busbars with the same polarity (positive or negative). The first polarity busbar only refers to the busbar at the end of the battery cell 201 that is farther from the main current lead 230. Please refer to [reference needed]. Figure 2 , Figure 2 The first polarity busbars of the three battery cells 201 in the upper battery partition 210 are, from left to right, negative busbar, negative busbar, and positive busbar.

[0048] For reference Figure 2 , Figure 2 In a specific embodiment, both the upper battery partition 210 and the lower battery partition 220 include three battery units 201. All battery units 201 in a single partition are connected in series, and the battery units 201 at the upper and lower positions are connected in parallel. Of course, since the current in the multi-segment photovoltaic module is led out through the main current lead 230, the main current lead 230 needs to be divided into positive and negative ends. That is, along the second direction, the main current lead 230 is divided into a positive region and a negative region. The busbars of the battery units 201 near the main current lead 230 in the positive region are all positive busbars, and the busbars of the battery units 201 near the main current lead 230 in the negative region and the point are all negative busbars.

[0049] The battery cells in the battery string are uncut rectangular cells or multi-cell cells, with cell sizes ranging from 158mm to 230mm in length and 30mm to 80mm in width. The battery string is composed of multiple cells connected in series, with the spacing between connected cells ranging from -1mm to 1.5mm. Negative numbers indicate that two cells overlap. The spacing between adjacent battery strings ranges from 0.5mm to 8mm.

[0050] The jumper 400 has a conductive metal wire inside, mainly composed of conductive base metals such as aluminum and copper, and an insulating layer on the outside. The diameter of the jumper 400 is not limited, but preferably ranges from 1mm to 10mm.

[0051] Preferably, the battery cell 201 includes multiple battery strings. Multiple battery strings form a battery cell 201, and a battery cell 201 shares a set of externally connected positive and negative busbars.

[0052] Furthermore, multiple batteries in the battery cell 201 are connected in series and parallel. (See reference...) Figure 3 , Figure 3 The individual battery cell 201 is outlined by a dotted line. Figure 2 and Figure 3 (The corresponding structures are the same, only the structures marked with reference numerals in the figures are different.) Connecting multiple batteries in series and parallel can greatly increase the current in the circuit without increasing the open-circuit voltage of the battery cell 201, that is, while reducing the internal power loss of the battery, it can also increase the output power of the component. Of course, the battery strings within a single battery cell 201 can also be connected in series, and this utility model does not limit this.

[0053] In one specific implementation, it also includes a first junction box 410 and a second junction box 420;

[0054] The first junction box 410 is correspondingly provided with the first through hole 310, the first polarity bus bar passes through the first through hole 310 and is connected to the jumper 400 inside the first junction box 410;

[0055] The second junction box 420 is provided corresponding to the second through hole 320. The main current lead 230 passes through the end of the second through hole 320 and is connected to the jumper 400 inside the second junction box 420.

[0056] In this specific embodiment, corresponding junction boxes are added to the first through hole 310 and the second through hole 320. The conductive structure (i.e., the corresponding busbar and the main current lead 230) in the laminated structure (i.e., the structure composed of the front cover plate 100, the battery layer and the back cover plate 300) is welded in the corresponding junction box. In other words, this specific embodiment not only reduces the welding difficulty, but also protects the relatively fragile metal welding position through the junction box, which greatly improves the working stability of the component and extends its service life. Figure 2 The first junction box 410 and the second junction box 420 are shielded by the battery layer, therefore Figure 2 The first junction box 410, the second junction box 420, and the main current lead 230 are outlined with short horizontal dashed lines.

[0057] In this specific embodiment, the width of the busbar of the battery unit 201 ranges from 1mm to 10mm, and the thickness ranges from 0.1mm to 1mm.

[0058] The back cover plate 300 can be a transparent glass cover plate, a mesh glass cover plate, or a composite material cover plate. The positions of the first through hole 310 and the second through hole 320 of the back cover plate 300 are determined according to the circuit. The diameter and shape of the through holes are not limited, as long as the busbar can be led out normally.

[0059] In addition, as a preferred embodiment, the main current lead 230 is a segmented lead, comprising multiple lead segments;

[0060] The adjacent lead segments are electrically connected through corresponding second junction boxes 420.

[0061] In this preferred embodiment, the main current lead 230 is improved into a segmented lead, and the connection between the segments is completed in the second junction box 420 on the outside of the laminated structure. Once the multi-segment photovoltaic module has a partial fault, it can be partially skipped and deactivated through the second junction box 420, which facilitates the fault detection and repair of the module and reduces the later maintenance costs.

[0062] Furthermore, the second junction box 420 includes a positive junction box 421;

[0063] The positive terminal box 421 is disposed at the positive terminal of the main current lead 230;

[0064] The positive terminal box 421 includes a first bypass diode 420A, which is reverse biased in the main current lead 230.

[0065] For reference Figure 4 , Figure 4The diagram shows an enlarged schematic of the positive terminal box 421. The first bypass diode 420A is used to be turned on by an external circuit when the corresponding battery cell 201 fails or is blocked, so as to short-circuit the corresponding battery cell 201 and prevent the non-generating battery cell 201 from being connected to the circuit and consuming the component's power generation.

[0066] Furthermore, the two battery cells 201 closest to the negative terminal of the main current lead 230 in the upper battery partition 210 or the lower battery partition 220 are respectively designated as the first negative battery cell 201 and the second negative battery cell 201.

[0067] The first polarity busbar of the first negative electrode battery unit 201 and the first polarity busbar of the second negative electrode battery unit 201 are electrically connected through the first junction box 410, so that the first negative electrode battery unit 201 and the second negative electrode battery unit 201 are connected in series.

[0068] In terms of layout design, not all connections between battery units 201 need to go through jumpers 400. For example, in this specific embodiment, the first negative battery unit 201 and the second negative battery unit 201 are electrically connected directly on the outside of the back cover plate 300 using the first junction box 410. This makes the component layout design more convenient, increases the freedom of layout design, and greatly reduces the difficulty of subsequent component fault detection and reduces component maintenance costs.

[0069] In another specific embodiment, the second junction box 420 includes a negative junction box 422;

[0070] The negative terminal box 422 is electrically connected to the first terminal box 410 between the first polarity busbar of the first negative terminal battery unit 201 and the first polarity busbar of the second negative terminal battery unit 201 via the jumper 400;

[0071] The negative terminal box 422 includes two second bypass diodes 420B connected in series, and the second bypass diodes 420B are reverse biased in the main current lead 230.

[0072] The connection point between the jumper 400 and the negative terminal box 422 is located between the two second bypass diodes 420B.

[0073] Please refer to Figure 5Under normal conditions, since the first negative battery unit 201 and the second negative battery unit 201 are connected in series through their respective first polarity busbars, the main current lead 230 in the negative junction box 422 does not carry current. Only when the battery unit 201 is faulty or blocked, the second bypass diode 420B is activated to short-circuit the faulty or blocked battery unit 201, thus preventing the non-generating battery unit 201 from being connected to the circuit and consuming the power generation of the component.

[0074] In another specific implementation, the first junction box 410 and the corresponding second junction box 420 are integrated into one unit.

[0075] For reference Figure 4 , Figure 5 and Figure 6 , Figure 4 and Figure 5 The first junction box 410 and the corresponding second junction box 420 are designed as an integrated unit. In other words, the first junction box 410 and the second junction box 420 are connected by jumper wires 400 before being installed onto the back cover plate 300. During installation, it is only necessary to pre-fix the first junction box 410 and the second junction box 420 to the corresponding through-hole positions, and then weld the corresponding leads to the jumper wires 400. This simplifies the manufacturing process and shortens the production time. Of course, the first junction box 410 and the corresponding second junction box 420 can also be installed separately, such as... Figure 6 As shown, the first junction box 410 and the corresponding second junction box 420 are not connected in advance via the jumper 400. Instead, the lead-out end is first soldered to the corresponding junction box, and then the first junction box 410 and the corresponding second junction box 420 are connected via the jumper 400.

[0076] The multi-segment photovoltaic module provided by this utility model includes a front cover plate 100, a battery layer, and a back cover plate 300 stacked sequentially; the battery layer includes an upper battery section 210 and a lower battery section 220 distributed along a first direction; each of the upper battery section 210 and the lower battery section 220 includes multiple battery cells 201 arranged along a second direction; each battery cell 201 includes multiple battery strings with their long axis arranged along the first direction; the first direction is perpendicular to the second direction; a main current lead 230 extending along the second direction is provided between the upper battery section 210 and the lower battery section 220; the back cover plate 300 includes a first through hole 310 and a second through hole 320; The battery cell 201 includes a first polarity busbar and a jumper 400; the first polarity busbar is the busbar of the battery cell 201 away from the main current lead 230; the jumper 400 is disposed on the back side of the back cover plate 300; the back side is the side of the back cover plate 300 away from the battery layer; the first through hole 310 is correspondingly disposed with the first polarity busbar, and the second through hole 320 is correspondingly disposed with the lead-out position of the main current lead 230; the first polarity busbar and the jumper 400 are connected through the first through hole 310; the jumper 400 extends to the second through hole 320 and is electrically connected to the main current lead 230 through the second through hole 320. This invention features a hole in the back cover plate 300, allowing the jumper wire 400 to no longer pass through the laminated structure of the photovoltaic module. Instead, it enables electrical connections between different cell strings within the laminated structure from outside the laminated structure, preventing microcracks in the cells caused by surface unevenness during lamination. Furthermore, it eliminates the need to reserve space between cell strings for the jumper wire 400, thus significantly increasing the design freedom of the module layout and reducing manufacturing complexity. In addition, placing the jumper wire 400 outside the laminated structure greatly relaxes the manufacturing requirements for it, allowing the use of base metal wires and reducing module costs.

[0077] One preparation method corresponding to this utility model includes,

[0078] S1: Complete the layout and welding of battery cell 201 and busbar according to the laminated structure circuit diagram to obtain the battery layer.

[0079] S2: The front cover plate 100, the battery layer and the back cover plate 300 are packaged and laid. After the back cover plate is laid, the corresponding busbar lead-out end is led out at the through hole position of the back cover plate 300 to obtain the laminated preform.

[0080] S3: The pre-lamination material will be laminated and encapsulated.

[0081] S4: The lead-out ends of the busbars at corresponding positions in the first junction box 410 and the second junction box 420 are bonded and fixed with silicone, and the lead-out ends of the busbars are firmly welded to the conductors of the junction boxes by welding, and then sealed with silicone.

[0082] S5: The jumper 400 is fixed to the back cover plate 300 by adhesive fastener 430 at the laying position, and the jumper 400 is fixed to the back cover plate 300 by the fastener 430, thus completing the component installation.

[0083] Based on the first specific implementation method, the configuration of the jumper 400 is further improved to obtain the second specific implementation method, the corresponding structural diagram of which is shown below. Figure 7 As shown,

[0084] It includes a front cover 100, a battery layer and a back cover 300 stacked in sequence;

[0085] The battery layer includes an upper battery partition 210 and a lower battery partition 220 distributed along a first direction;

[0086] Both the upper battery partition 210 and the lower battery partition 220 include a plurality of battery cells 201 arranged along the second direction; each battery cell 201 includes a battery string whose long axis is arranged along the first direction; the first direction is perpendicular to the second direction.

[0087] A main current lead 230 extending in the second direction is provided between the upper battery partition 210 and the lower battery partition 220.

[0088] The back cover plate 300 includes a first through hole 310 and a second through hole 320; the battery cell 201 includes a first polarity busbar and a jumper 400; the first polarity busbar is the busbar of the battery cell 201 away from the main current lead 230; the jumper 400 is disposed on the back side of the back cover plate 300; the back side is the side of the back cover plate 300 away from the battery layer;

[0089] The first through hole 310 is provided corresponding to the first polarity busbar, and the second through hole 320 is provided corresponding to the lead-out position of the main current lead 230;

[0090] The first polarity busbar is connected to the jumper 400 through the first through hole 310; the jumper 400 extends to the second through hole 320 and is electrically connected to the main current lead 230 through the second through hole 320.

[0091] It also includes the 430 clip;

[0092] The buckle 430 secures the jumper 400 to the back cover plate 300.

[0093] The difference between this specific embodiment and the above specific embodiment is that the jumper 400 is fixed by the buckle 430 in this specific embodiment. The rest of the structure is the same as the above specific embodiment, and will not be described in detail here.

[0094] In this specific embodiment, a buckle 430 is provided on the back cover plate 300. The buckle 430 fixes the jumper 400 to the surface of the back cover plate 300 to prevent the jumper 400 from shaking and causing damage to the component. The position and number of buckles 430 are not limited, thereby greatly improving the working stability of the jumper 400. At the same time, compared with using tape or adhesive, using buckles 430 to fix the jumper 400 is less costly, has higher working stability, and is simpler in process, which is conducive to improving production efficiency.

[0095] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0096] It should be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0097] The multi-segment photovoltaic module provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A multi-segment photovoltaic module, characterized in that, It includes a front cover, a battery layer, and a back cover that are stacked in sequence; The battery layer includes an upper battery section and a lower battery section distributed along a first direction; Both the upper battery partition and the lower battery partition include multiple battery cells arranged along the second direction; each battery cell includes multiple battery strings whose long axis is arranged along the first direction; the first direction is perpendicular to the second direction. A main current lead extending along the second direction is provided between the upper battery partition and the lower battery partition; The back cover plate includes a first through hole and a second through hole; the battery cell includes a first polarity busbar and a jumper wire; the first polarity busbar is the busbar of the battery cell away from the main current lead; the jumper wire is disposed on the back side of the back cover plate; the back side is the side of the back cover plate away from the battery layer; The first through hole is provided corresponding to the first polarity bus bar, and the second through hole is provided corresponding to the lead-out position of the main current lead. The first polarity busbar is connected to the jumper wire through the first through hole; the jumper wire extends to the second through hole and is electrically connected to the main current lead through the second through hole.

2. The multi-segment photovoltaic module as described in claim 1, characterized in that, The battery cell contains multiple batteries connected in series and parallel.

3. The multi-segment photovoltaic module as described in claim 1, characterized in that, It also includes the first junction box and the second junction box; The first junction box is provided corresponding to the first through hole, and the first polarity bus bar passes through the first through hole and is connected to the jumper wire inside the first junction box; The second junction box is provided corresponding to the second through hole, and the main current lead passes through the end of the second through hole and is connected to the jumper wire inside the second junction box.

4. The multi-segment photovoltaic module as described in claim 3, characterized in that, The main current lead is a segmented lead, comprising multiple lead segments; The adjacent lead segments are electrically connected through corresponding second junction boxes.

5. The multi-segment photovoltaic module as described in claim 4, characterized in that, The second junction box includes a positive terminal junction box; The positive terminal box is located at the positive end of the main current lead; The positive terminal box includes a first bypass diode, which is reverse biased in the main current lead.

6. The multi-segment photovoltaic module as described in claim 3, characterized in that, In the upper battery partition or the lower battery partition, the two battery cells closest to the negative terminal of the main current lead are respectively designated as the first negative battery cell and the second negative battery cell. The first polarity busbar of the first negative electrode battery unit and the first polarity busbar of the second negative electrode battery unit are electrically connected through the first junction box, so that the first negative electrode battery unit and the second negative electrode battery unit are connected in series.

7. The multi-segment photovoltaic module as described in claim 6, characterized in that, The second junction box includes a negative junction box; The negative terminal box is electrically connected to the first terminal box between the first polarity busbar of the first negative terminal battery unit and the first polarity busbar of the second negative terminal battery unit via the jumper wire; The negative terminal box includes two second bypass diodes connected in series, and the second bypass diodes are reverse biased in the main current lead; The connection point between the jumper and the negative terminal box is located between the two second bypass diodes.

8. The multi-segment photovoltaic module as described in claim 3, characterized in that, The first junction box and the corresponding second junction box are integrated into one unit.

9. The multi-cell photovoltaic module as described in claims 1 to 8, characterized in that, It also includes clips; The buckle secures the jumper to the back cover.

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