CN212380428U - Linear silicon-based battery and photovoltaic module - Google Patents

Abstract

The utility model discloses a linear silicon-based battery and photovoltaic module belongs to solar energy technical field. The linear silicon-based battery comprises a first conductive part, a silicon substrate, a diffusion layer and a second conductive part; the first conductive part is arranged inside the silicon substrate, and the diffusion layer is circumferentially deposited on the outer surface of the silicon substrate; the second conductive part is fixed on the outer surface of the diffusion layer, and the fixed positions of the second conductive part and the diffusion layer are positioned on the backlight side of the diffusion layer. Therefore, when the linear silicon-based battery is manufactured, the silicon raw material can be directly drawn to form the silicon substrate, and then the diffusion layer is circumferentially deposited on the outer surface of the silicon substrate, so that the material loss in the raw material processing stage can be reduced. And because the first conductive part is positioned in the linear silicon-based battery, and the fixed positions of the second conductive part and the diffusion layer are positioned on the backlight side of the diffusion layer, the first conductive part and the second conductive part can not shield external light entering the linear silicon-based battery, and the utilization rate of the linear silicon-based battery to light can be improved.

Description

Linear silicon-based battery and photovoltaic module

Technical Field

The utility model belongs to the technical field of solar energy, concretely relates to linear silicon-based battery and photovoltaic module.

Background

With the continuous development of new energy, solar energy is widely regarded as a renewable resource. Solar cells have also received much attention as a carrier that can directly generate electricity using sunlight. Among them, the silicon-based cell is a solar cell type which has been developed rapidly in recent years.

At present, common silicon-based batteries include crystalline silicon solar cells, the crystalline silicon solar cells are silicon wafers or wafers, the structure of the crystalline silicon solar cells is a square or round sheet structure, the crystalline silicon solar cells can include monocrystalline silicon cells and polycrystalline silicon cells, no matter the monocrystalline silicon cells and the polycrystalline silicon cells are provided with at least one group of PN junctions, a conductive structure is formed on the PN junctions, and then current generated by the crystalline silicon cells is led out. However, since the crystalline silicon cell silicon wafer needs to be sliced on a silicon ingot or a silicon rod in the manufacturing process, the loss rate of the silicon material is high, and the production cost of the crystalline silicon cell silicon wafer is increased.

Most of the existing crystalline silicon cells are planar, and the crystalline silicon cells are all arranged on the same plane to manufacture a solar module, so that the solar module cannot be bent, and the application scene of the crystalline silicon cell module is limited. The other existing linear silicon-based photovoltaic cell adopts a transparent conducting layer to cover the outer layer as an electrode, but even the transparent conducting layer still has the problems of surface reflection and self light transmittance, has certain influence on light absorption of the cell, and reduces the utilization rate of the cell; and the transparent conductive layer also increases the production cost of the battery.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a linear silicon-based battery and photovoltaic module can solve the problem that crystalline silicon battery silicon chip manufacturing cost is higher and linear silicon-based battery's battery utilization ratio is not high simultaneously.

In order to solve the technical problem, the utility model discloses a realize like this:

in a first aspect, an embodiment of the present invention provides a linear silicon-based battery, which includes a first conductive part, a silicon substrate, a diffusion layer, and a second conductive part;

the first conductive part is arranged inside the silicon substrate, and the diffusion layer is circumferentially deposited on the outer surface of the silicon substrate;

the second conductive part is fixed on the outer surface of the diffusion layer, and the fixed positions of the second conductive part and the diffusion layer are positioned on the backlight side of the diffusion layer.

Optionally, the linear silicon-based battery further comprises a passivation antireflection film;

the passivating antireflective film is circumferentially deposited on an outer surface of the diffusion layer.

Optionally, the first conductive part and the second conductive part are each independently a metal wire or a metal conduit.

Optionally, the second conductive part is a metal conductive layer;

the metal conducting layer is circumferentially deposited on the surface of the backlight side of the diffusion layer, and the surface of the metal conducting layer, which is far away from the backlight side of the diffusion layer, comprises a fixing surface, wherein the fixing surface is used for providing a mounting point for the linear silicon-based battery.

Optionally, the metal conductive layer is a square conductor;

the top of the square conductor is fixed on the outer surface of the diffusion layer, and the bottom of the square conductor is any one of a plane, a cambered surface or a wavy surface.

Optionally, the first conductive part is a positive electrode, and the second conductive part is a negative electrode.

Optionally, the first conductive part is a negative electrode, and the second conductive part is a positive electrode.

In a second aspect, an embodiment of the present invention further provides a photovoltaic module, where the photovoltaic module includes a substrate and the linear silicon-based battery described in any of the embodiments of the first aspect;

and the backlight surfaces of the linear silicon-based batteries are fixed on the substrate, and the linear silicon-based batteries are electrically connected with the substrate.

Optionally, the substrate includes a back plate and a conductive layer;

conductive electrodes are arranged at two ends of the back plate, and two ends of the first conductive part are respectively contacted with the conductive electrodes;

the conductive layer is disposed on the back plate, and the second conductive portion is fixed on the conductive layer.

Optionally, the photovoltaic module comprises a single-layer cell module or a multi-layer cell module;

under the condition that the photovoltaic assembly comprises a single-layer cell module, the single-layer cell module comprises a plurality of linear silicon-based cells which are arranged in parallel in a first direction, wherein the first direction is a direction intersecting with the length direction of the linear silicon-based cells;

under the condition that the photovoltaic module comprises a plurality of layers of battery piece modules, each layer of battery piece module comprises a plurality of linear silicon-based batteries which are arranged in parallel, and the plurality of layers of battery piece modules comprise a plurality of linear silicon-based batteries which are stacked along a second direction, wherein the second direction is perpendicular to the first direction.

According to the embodiment of the utility model provides a line type silicon-based battery can see out, because first conductive part sets up inside the silicon substrate, diffusion layer circumference deposit is on the surface of silicon substrate, the second conductive part is fixed on the surface of diffusion layer, consequently, when making line type silicon-based battery, can be directly with silicon raw materials wire drawing formation silicon substrate, again with diffusion layer circumference deposit on the surface of silicon substrate can, like this, can reduce the material loss in the raw materials processing stage, and then reduce photovoltaic module's manufacturing cost. And because the first conductive part is positioned in the linear silicon-based battery, and the fixed positions of the second conductive part and the diffusion layer are positioned on the backlight side of the diffusion layer, the first conductive part and the second conductive part can not shield external light entering the linear silicon-based battery, and the utilization rate of the linear silicon-based battery to light can be improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of a linear silicon-based battery according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another linear silicon-based battery according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a photovoltaic module according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of another photovoltaic module according to an embodiment of the present invention.

Reference numerals

1-linear silicon-based batteries; 2-a substrate; 11-a first conductive portion; a 12-silicon substrate; 13-a diffusion layer; 14-a second conductive portion; 15-passivating the antireflective film; 21-a back plate; 22-a conductive layer; 141-a metal conductive layer; 1411-fixed surface.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The terms "first," "second," and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention may be practiced in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The embodiments of the present invention provide a linear silicon-based battery and a photovoltaic module, which are described in detail below with reference to the accompanying drawings. Fig. 1 is a schematic structural diagram of a linear silicon-based battery according to an embodiment of the present invention; as shown in fig. 1, the line type silicon-based battery includes a first conductive part 11, a silicon substrate 12, a diffusion layer 13, and a second conductive part 14; the first conductive part 11 is disposed inside the silicon substrate 12, the diffusion layer 13 is circumferentially deposited on the outer surface of the silicon substrate 12, the second conductive part 14 is fixed on the outer surface of the diffusion layer 13, and the fixing positions of the second conductive part 14 and the diffusion layer 13 are located on the backlight side of the diffusion layer 13.

The first conductive part 11 is located inside the linear silicon-based battery and mainly plays a role in conducting electricity. Specifically, if the linear silicon-based battery is P-type, the first conductive part 11 can be used as a positive electrode of the linear silicon-based battery. If the linear silicon-based battery is N-type, the first conductive part 11 can be used as a negative electrode of the linear silicon-based battery. The silicon substrate 12 is a linear silicon-based battery body, and the silicon substrate 12 is doped with solar-grade monocrystalline silicon or polycrystalline silicon.

It should be noted that, because the first conductive part 11 is located inside the linear silicon-based battery, the first conductive part 11 does not block external light entering the linear silicon-based battery, and the utilization rate of the linear silicon-based battery to light can be improved.

Secondly, the diffusion layer 13 mainly provides PN junction for the linear silicon-based battery, if the linear silicon-based battery is P-type, the diffusion layer 13 is N-type, and the doping impurities can be phosphorus, arsenic, antimony, and other materials. If the linear silicon-based cell is N-type, the diffusion layer 13 is P-type, and the doping impurities may be boron or indium. The second conductive part 14 is fixed on the outer surface of the diffusion layer 13 and contacts with the diffusion layer 13, and if the linear silicon-based battery is P-type, the second conductive part 14 can be used as a negative electrode of the linear silicon-based battery. If the line-type silicon-based battery is N-type, the second conductive part 14 can be used as a positive electrode of the line-type silicon-based battery, which is not limited by the present invention. When the linear silicon-based cell is mounted, one side of the diffusion layer 13 is fixed on the substrate of the photovoltaic module, and the side fixed on the substrate of the photovoltaic module is the backlight side of the diffusion layer 13, and light enters the cell from the side of the diffusion layer 13 far from the substrate. As shown in fig. 1, the a side of the diffusion layer 13 is the light receiving side, and the B side of the diffusion layer 13 is the backlight side. Therefore, under the condition that the fixed positions of the second conductive part 14 and the diffusion layer 13 are positioned on the backlight side of the diffusion layer 13, the second conductive part 14 can not shield the light entering the cell, and the utilization rate of the linear silicon-based cell to the light is further improved.

It should be noted that each of the first conductive part 11 and the second conductive part 14 may be independently a metal or an alloy having high electric conductivity, such as silver, copper, aluminum, or gold, and further, the current generated in the silicon substrate 12 may be conducted to the outside through the first conductive part 11 and the second conductive part 14. In addition, the first conductive part 11 may be a metal wire or a metal conduit, and the second conductive part 14 may also be a metal wire or a metal conduit, or other shapes, so as to adapt to different installation environments of the linear silicon-based battery, which is not limited by the present invention.

It can be seen from the above embodiment that, in the embodiment of the present invention, since the first conductive part 11 is disposed inside the silicon substrate 12, the diffusion layer 13 is circumferentially deposited on the outer surface of the silicon substrate 12, and the second conductive part 14 is fixed on the outer surface of the diffusion layer 13, therefore, when manufacturing a line type silicon-based battery, the silicon raw material can be directly drawn to form the silicon substrate 12, and the diffusion layer 13 is circumferentially deposited on the outer surface of the silicon substrate 12, so that the material loss in the raw material processing stage can be reduced, and the production cost of the photovoltaic module can be further reduced. And because the first conductive part 11 is positioned in the linear silicon-based battery, and the fixing positions of the second conductive part 14 and the diffusion layer 13 are positioned on the backlight side of the diffusion layer 13, the first conductive part 11 and the second conductive part 14 do not shield external light entering the linear silicon-based battery, which is beneficial to improving the utilization rate of the linear silicon-based battery to light.

Optionally, as shown in fig. 1 to fig. 2, the linear silicon-based battery further includes a passivation antireflection film 15; a passivating antireflective film 15 is circumferentially deposited on the outer surface of the diffusion layer 13.

Specifically, the passivation antireflection film 15 may be any one of a single layer or a multilayer film of silicon nitride, silicon oxynitride, silicon oxide, aluminum oxide, and the like, and since the passivation antireflection film 15 has a certain strength and a low surface reflectivity, when the passivation antireflection film 15 is circumferentially deposited on the outer surface of the diffusion layer 13, on one hand, the passivation antireflection film can protect the outer surface of the linear silicon-based battery, so as to reduce the damage rate of the outer surface of the linear silicon-based battery, and prolong the service life of the linear silicon-based battery. On the other hand, the reflectivity of the outer surface of the diffusion layer 13 can be reduced, the light absorption rate is improved, and the productivity and efficiency of the linear silicon-based battery are further improved. In addition, in the present invention, the outer surface of the diffusion layer 13 is the surface of the diffusion layer 13 away from the silicon substrate 12.

Optionally, the first conductive part 11 and the second conductive part 14 are each independently a metal wire or a metal conduit.

Specifically, the first conductive part 11 and the second conductive part 14 may be metal wires with a solid structure, and further may be directly electrically connected to the substrate through the metal wires, and since the metal wires may be bent at will, the connection between the linear silicon-based battery and the substrate is more convenient. In order to reduce the weight of the entire photovoltaic module, the first conductive part 11 and the second conductive part 14 may be metal pipes, and may be directly electrically connected to the substrate through the metal pipes while reducing the overall weight. The metal wire or the metal conduit may be made of any one of metals or alloys having high electric conductivity, such as silver, copper, aluminum, and gold, and further, the electric conductivity of the first conductive part 11 and the second conductive part 14 may be ensured. In addition, in the case where the second conductive part 14 is a metal wire or a metal conduit, the side of the second conductive part 14 close to the first conductive part 11 may be embedded in the diffusion layer 13, and during the installation of the second conductive part 14, the position where the diffusion layer 13 is connected to the second conductive part 14 may be recessed toward the first conductive part 11, thereby providing a receiving space for the second conductive part 14. The side of the second conductive part 14 away from the first conductive part 11 protrudes out of the outer surface of the diffusion layer 13, thereby facilitating the second conductive part 14 to be fixed on the substrate through a connector such as conductive adhesive. The aforesaid is only the utility model discloses the exemplary shaping mode of the silica-based battery of line type, the embodiment of the utility model provides a silica-based battery of line type can also adopt other shaping modes, the embodiment of the utility model provides a no longer describe to this.

It should be noted that, in the case where the first conductive part 11 and the second conductive part 14 are each independently a metal wire or a metal conduit, the surface of the second conductive part 14 is an arc-shaped surface, and when the linear silicon-based battery is mounted on a substrate, it is difficult to fix the linear silicon-based battery, and further, as shown in fig. 2, the second conductive part 11 may be provided as a metal conductive layer 141 which is easier to mount and fix, and therefore, in view of mounting and transportation, the embodiment in which the second conductive part 14 is the metal conductive layer 141 may be taken as a preferred embodiment, specifically as follows:

optionally, as shown in fig. 2, the second conductive part 14 is a metal conductive layer 141, the metal conductive layer 141 is circumferentially deposited on the surface of the diffusion layer 13 on the backlight side, and the surface of the metal conductive layer 141 away from the diffusion layer 13 on the backlight side includes a fixing surface 1411, where the fixing surface 1411 is used for providing a mounting point for the line-type silicon-based battery.

It should be noted that, in an application scenario with certain features, for example, when a conductive layer disposed on a substrate for fixing the linear silicon-based battery is relatively flat, if the second conductive part 14 is in a ring-shaped, rod-shaped, or cylindrical structure, it is not easy to fix on the substrate, in this case, the second conductive part 14 is the metal conductive layer 141, and the surface of the metal conductive layer 141 away from the backlight side of the diffusion layer 13 is the fixing surface 1411, so that the linear silicon-based battery is conveniently fixed on the relatively flat conductive layer, and the difficulty in installing the linear silicon-based battery is reduced. Further, in a possible implementation manner, when the fixing surface 1411 is a plane, the metal conductive layer 141 may have a rectangular parallelepiped sheet-shaped structure, and a backlight surface of the diffusion layer 13 corresponds to the rectangular parallelepiped sheet-shaped structure, so as to facilitate the bonding between the metal conductive layer 141 and the diffusion layer 13.

Optionally, the metal conductive layer 141 is a square conductor; the top of the square conductor is fixed on the outer surface of the diffusion layer 13, and the bottom of the square conductor is any one of a plane surface, a cambered surface or a wave-shaped surface.

It should be noted that, square conductor can be any one of shape such as cuboid, square, prism, under certain specific scene, square conductor's bottom can be any one of plane, cambered surface or wave surface, and the shape of the conducting layer that specific shape set up on the basis of the base plate is confirmed, the utility model discloses the contrast is not restricted. Thus, the linear silicon-based battery can be arranged on a substrate with any specification, and the installation scene of the linear silicon-based battery is not limited. It should be noted that the top of the square conductor is the surface close to the diffusion layer 13, the bottom of the square conductor is the surface far from the diffusion layer 13, and the top and the bottom of the square conductor are two opposite surfaces of the square conductor.

Optionally, the first conductive part 11 is a positive electrode, and the second conductive part 14 is a negative electrode.

Specifically, if the linear silicon-based battery is P-type, the first conductive part 11 can be a positive electrode of the linear silicon-based battery, the diffusion layer 13 is N-type, the doping impurities can be phosphorus, arsenic, antimony, and the like, and the second conductive part 14 is a negative electrode. In this way, when the substrate is connected, the second conductive parts 14 and the conductive layers 12 of the plurality of linear silicon-based cells constitute negative electrodes of the photovoltaic module, and the first conductive parts 11 and the conductive electrodes of the plurality of linear silicon-based cells constitute positive electrodes of the photovoltaic module.

Optionally, the first conductive part 11 is a negative electrode, and the second conductive part 14 is a positive electrode.

Specifically, if the linear silicon-based battery is N-type, the first conductive part 11 may be a negative electrode of the linear silicon-based battery, the diffusion layer 13 is P-type, the doping impurities may be boron, indium, gallium, and the like, and the second conductive part 14 is a positive electrode. In this way, when the substrate is connected, the second conductive parts 14 and the conductive layers 12 of the plurality of linear silicon-based cells constitute the positive electrode of the photovoltaic module, and the first conductive parts 11 and the conductive electrodes of the plurality of linear silicon-based cells constitute the negative electrode of the photovoltaic module. In addition, it should be noted that, above-mentioned two kinds of implementation modes are only the utility model discloses a two preferred embodiments can deposit N type silicon and P type silicon respectively on the photovoltaic module's of the utility model discloses the embodiment does not limit to this.

It can be seen from the above embodiment that, in the embodiment of the present invention, since the first conductive part 11 is disposed inside the silicon substrate 12, the diffusion layer 13 is circumferentially deposited on the outer surface of the silicon substrate 12, and the second conductive part 14 is fixed on the outer surface of the diffusion layer 13, therefore, when manufacturing a line type silicon-based battery, the silicon raw material can be directly drawn to form the silicon substrate 12, and the diffusion layer 13 is circumferentially deposited on the outer surface of the silicon substrate 12, so that the material loss in the raw material processing stage can be reduced, and the production cost of the photovoltaic module can be further reduced. And because the first conductive part 11 is positioned in the linear silicon-based battery, and the fixing positions of the second conductive part 14 and the diffusion layer 13 are positioned on the backlight side of the diffusion layer 13, the first conductive part 11 and the second conductive part 14 do not shield external light entering the linear silicon-based battery, which is beneficial to improving the utilization rate of the linear silicon-based battery to light.

In addition, in the case that the second conductive part 14 is the metal conductive layer 141, the surface of the metal conductive layer 141 away from the backlight side of the diffusion layer 13 may be the fixing surface 1411, so that the linear silicon-based battery is conveniently fixed on the flat conductive layer, and the difficulty in mounting the linear silicon-based battery is reduced.

In a second aspect, fig. 3 is a schematic structural diagram of a photovoltaic module according to an embodiment of the present invention, the schematic structural diagram is a schematic diagram of a direction perpendicular to a surface of the photovoltaic module, as shown in fig. 3, the photovoltaic module includes a substrate 2 and the linear silicon-based battery 1 according to any embodiment of the first aspect; the backlight surfaces of the linear silicon-based batteries 1 are fixed on the substrate 2, and the linear silicon-based batteries 1 are electrically connected with the substrate 2.

The linear silicon-based battery 1 is a multilayer linear battery and can be formed by wire drawing, so that the raw material loss in the raw material processing stage can be reduced. Under the condition that the cross section of the linear silicon-based battery 1 is circular, the diameter of the linear silicon-based battery 1 can be any value between 50 μm and 1000 μm, which is not limited by the embodiment of the present invention. Compared with a crystal silicon wafer, under the condition that the linear silicon-based battery 1 is a linear battery with a multilayer structure, the adjustment space of the linear structure on the length is large, and the adjustment mode is simple, so that the overall size of the photovoltaic module can be adjusted according to the processing and actual requirements.

The linear silicon-based battery 1 may comprise a light receiving surface and a backlight surface, the light receiving surface of the linear silicon-based battery 1 is a surface far away from the substrate 2, and the backlight surface of the linear silicon-based battery 1 is a surface close to the substrate 2. The backlight surface of the linear silicon-based battery 1 is fixed on the substrate 2. Specifically, a plurality of silicon-based batteries of line type 1 can evenly arrange along base plate 2's width direction, also can arrange along base plate 2's width direction is irregular, perhaps, a plurality of silicon-based batteries of line type 1 also can arrange along the direction on perpendicular to base plate 2's surface three-dimensionally, and the mode of specifically arranging is confirmed according to processing technology's production demand, the embodiment of the utility model discloses do not prescribe a limit to this.

It should be noted that the number of the linear silicon-based batteries 1 included in the photovoltaic module is determined according to the overall output efficiency of the photovoltaic module, and the output efficiency of the photovoltaic module can be dynamically adjusted by increasing or decreasing the number of the linear silicon-based batteries 1 included in the photovoltaic module, so that the energy loss caused by too many or too few linear silicon-based batteries 1 is reduced.

It should be further noted that, because each linear silicon-based battery 1 is a linear battery, when the linear silicon-based battery 1 reaches a preset value, the linear silicon-based battery 1 can be bent, so that the bending resistance degree of each linear silicon-based battery 1 is increased, and in the case that the substrate 2 is also made of a flexible material, the photovoltaic module can be a flexible module, so that the photovoltaic module can be installed on any installation surface, and the application scene of the photovoltaic module is not limited.

In addition, the backlight surfaces of the linear silicon-based batteries 1 can be welded or adhered to the substrate 2 by conductive glue, or the generated electric quantity of the linear silicon-based batteries 1 can be transmitted to the outside through the substrate 2 by other modes, so that the power supply performance of the photovoltaic module is realized.

As can be seen from the above embodiments, in the embodiment of the present invention, the photovoltaic module includes a substrate 2 and a plurality of linear silicon-based batteries 1; each linear silicon-based battery 1 is a linear battery, the backlight surfaces of the linear silicon-based batteries 1 are fixed on the substrate 2, and the linear silicon-based batteries 1 are electrically connected with the substrate 2. On one hand, each linear silicon-based battery 1 is a linear battery, so that each linear silicon-based battery 1 can be bent in the length direction, the photovoltaic module can be installed on any installation surface, and the application scene of the photovoltaic module is not limited. On the other hand, each linear silicon-based battery 1 is a linear battery and can be formed by wire drawing, so that the material loss in the raw material processing stage can be reduced, and the production cost of the photovoltaic module is further reduced.

Alternatively, as shown in fig. 4, the substrate 2 includes a back plate 21 and a conductive layer 22; conductive electrodes are arranged at two ends of the back plate 21, and two ends of the first conductive part 11 are respectively contacted with the conductive electrodes; the conductive layer 22 is provided on the back plate 21, and the second conductive part 14 is fixed on the conductive layer 22.

Specifically, fig. 4 is a schematic structural diagram of another photovoltaic module provided by the embodiment of the present invention, and the direction of the view is consistent with the length direction of the photovoltaic module. The back plate 21 is a supporting body of the photovoltaic module, and the back plate 21 may be made of a material with a certain strength, such as glass, a rubber material or an alloy material, so that the photovoltaic module has a certain strength and toughness, and is further adapted to different application scenarios of the photovoltaic module. In addition, one or more conductive layers 22 are bonded or welded on the back plate 21, the conductive layer 22 may be any metal or alloy material with good conductivity, and the second conductive part 14 may be fixed on the conductive layer 22 by welding or conductive resin bonding, so that the second conductive parts 14 of the plurality of linear silicon-based batteries 1 are all in contact with the conductive layer 22, and further jointly form a positive electrode or a negative electrode of the photovoltaic module. Specifically, if the linear silicon-based cells 1 are P-type, the second conductive parts 14 and the conductive layers 22 of the plurality of linear silicon-based cells 1 constitute negative electrodes of the photovoltaic module. If the linear silicon-based cells 1 are N-type, the second conductive parts 14 and the conductive layers 22 of the plurality of linear silicon-based cells 1 constitute the positive electrode of the photovoltaic module.

In addition, two ends of the first conductive parts 11 of the plurality of linear silicon-based batteries 1 are respectively provided with conductive electrodes to be in contact with two ends of the back plate 21, taking the first conductive part 11 of one linear silicon-based battery 1 as an example, the first conductive part 11 may extend out from two ends of the linear silicon-based battery 1, one end of the first conductive part 11 and the conductive electrode at the first edge of the back plate 21 are fixed by welding or conductive resin, the other end of the first conductive part 11 and the conductive electrode at the second edge of the back plate 21 are fixed by welding or conductive resin, wherein the first edge and the second edge are two opposite edges in the length direction of the back plate 21. Thus, the first conductive parts 11 of the plurality of linear silicon-based batteries 1 are all contacted with the conductive electrodes, and further jointly form the positive electrode or the negative electrode of the photovoltaic module. Specifically, if the linear silicon-based cells 1 are P-type, the first conductive parts 11 and the conductive electrodes of the plurality of linear silicon-based cells 1 constitute positive electrodes of the photovoltaic module. If the linear silicon-based batteries 1 are N-type, the first conductive parts 11 and the conductive electrodes of the plurality of linear silicon-based batteries 1 constitute negative electrodes of the photovoltaic module.

Optionally, as shown in fig. 4, the photovoltaic module includes a single-layer cell module or a multi-layer cell module; under the condition that the photovoltaic module comprises a single-layer cell module, the single-layer cell module comprises a plurality of linear silicon-based cells 1 which are arranged in parallel in a first direction, wherein the first direction is a direction intersecting with the length direction of the linear silicon-based cells 1; under the condition that the photovoltaic module comprises a plurality of layers of cell modules, each layer of cell module comprises a plurality of linear silicon-based cells 1 which are arranged in parallel, and the plurality of layers of cell modules comprise a plurality of linear silicon-based cells 1 which are stacked in the second direction, wherein the second direction is perpendicular to the first direction.

It should be noted that the photovoltaic module may be composed of a single-layer linear silicon-based cell 1, or may be composed of multiple layers of linear silicon-based cells 1. Specifically, in the case where the photovoltaic module is constituted by a single-layer linear silicon-based cell 1, the photovoltaic module includes a single-layer cell sheet module. In the case where the photovoltaic module is constituted by the multilayer linear silicon-based cell 1, the photovoltaic module includes a multilayer cell sheet module. Further, in the case that the photovoltaic module includes a single-layer cell module, a plurality of linear silicon-based cells 1 may be tiled on the substrate 2 along the first direction. In the case where the photovoltaic module comprises a multilayer cell module, a plurality of linear silicon-based cells 1 may be stacked on the substrate 2 in the second direction. The number of piles of the silicon-based battery 1 of line type of multilayer battery piece module is confirmed by processing technology and production demand, the utility model discloses do not limit to this. The first direction is the same as the direction shown by the X direction in fig. 4, and the second direction is the same as the direction shown by the Y direction in fig. 4.

As can be seen from the above embodiments, in the embodiment of the present invention, the photovoltaic module includes a substrate 2 and a plurality of linear silicon-based batteries 1; each linear silicon-based battery 1 is a linear battery, the backlight surfaces of the linear silicon-based batteries 1 are fixed on the substrate 2, and the linear silicon-based batteries 1 are electrically connected with the substrate 2. On one hand, each linear silicon-based battery 1 is a linear battery, so that each linear silicon-based battery 1 can be bent in the length direction, the photovoltaic module can be installed on any installation surface, and the application scene of the photovoltaic module is not limited. On the other hand, each linear silicon-based battery 1 is a linear battery and can be formed by wire drawing, so that the material loss in the raw material processing stage can be reduced, and the production cost of the photovoltaic module is further reduced.

In addition, the second conductive part 14 included in the linear silicon-based battery 1 may also be a metal conductive layer 242, the metal conductive layer 242 is circumferentially deposited on the backlight surface of the diffusion layer 13, and the surface of the metal conductive layer 242 away from the diffusion layer 13 is a plane, so that the linear silicon-based battery 1 is conveniently fixed on the relatively flat conductive layer 22, and the difficulty in mounting the linear silicon-based battery 1 is reduced.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the apparatus of the embodiments of the present invention is not limited to performing functions in the order illustrated or discussed, but may include performing functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention.

Claims (10)

1. A linear silicon-based battery is characterized in that the linear silicon-based battery comprises a first conductive part, a silicon substrate, a diffusion layer and a second conductive part;

the first conductive part is arranged inside the silicon substrate, and the diffusion layer is circumferentially deposited on the outer surface of the silicon substrate;

the second conductive part is fixed on the outer surface of the diffusion layer, and the fixed positions of the second conductive part and the diffusion layer are positioned on the backlight side of the diffusion layer.

2. The linear silicon-based battery according to claim 1, further comprising a passivation antireflective film;

the passivating antireflective film is circumferentially deposited on an outer surface of the diffusion layer.

3. The linear silicon-based battery according to claim 1, wherein the first and second conductive portions are each independently a metal wire or a metal conduit.

4. The linear silicon-based battery according to claim 1, wherein the second conductive part is a metal conductive layer;

the metal conducting layer is circumferentially deposited on the surface of the backlight side of the diffusion layer, and the surface of the metal conducting layer, which is far away from the backlight side of the diffusion layer, comprises a fixing surface, wherein the fixing surface is used for providing a mounting point for the linear silicon-based battery.

5. The linear silicon-based battery according to claim 4, wherein the metal conductive layer is a square conductor;

the top of the square conductor is fixed on the outer surface of the diffusion layer, and the bottom of the square conductor is any one of a plane, a cambered surface or a wavy surface.

6. The linear silicon-based battery according to claim 1, wherein the first conductive portion is a positive electrode and the second conductive portion is a negative electrode.

7. The linear silicon-based battery according to claim 1, wherein the first conductive portion is a negative electrode and the second conductive portion is a positive electrode.

8. A photovoltaic module comprising a substrate and a linear silicon-based cell according to any one of claims 1 to 7;

and the backlight surfaces of the linear silicon-based batteries are fixed on the substrate, and the linear silicon-based batteries are electrically connected with the substrate.

9. The photovoltaic module of claim 8, wherein the substrate comprises a backsheet and a conductive layer;

conductive electrodes are arranged at two ends of the back plate, and two ends of the first conductive part are respectively contacted with the conductive electrodes;

the conductive layer is disposed on the back plate, and the second conductive portion is fixed on the conductive layer.

10. The photovoltaic module of claim 8, wherein the photovoltaic module comprises a single-layer cell module or a multi-layer cell module;

under the condition that the photovoltaic assembly comprises a single-layer cell module, the single-layer cell module comprises a plurality of linear silicon-based cells which are arranged in parallel in a first direction, wherein the first direction is a direction intersecting with the length direction of the linear silicon-based cells;

under the condition that the photovoltaic module comprises a plurality of layers of battery piece modules, each layer of battery piece module comprises a plurality of linear silicon-based batteries which are arranged in parallel, and the plurality of layers of battery piece modules comprise a plurality of linear silicon-based batteries which are stacked along a second direction, wherein the second direction is perpendicular to the first direction.

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