TOPCon type solar cell module

Abstract

The utility model discloses a TOPCon type solar cell module, which comprises front glass, back glass, a TOPCon solar cell layer positioned between the front glass and the back glass, and EVA (Ethylene Vinyl Acetate) packaging films distributed up and down. The edge of the assembly is wrapped by an aluminum alloy frame, and a heat dissipation channel is arranged in the aluminum alloy frame and used for leading out heat from the edge of the assembly. An active heat dissipation assembly is arranged at the bottom of the assembly and comprises a centrifugal fan and a flow guide pipe communicated with the centrifugal fan, and the centrifugal fan rapidly takes away heat of the center area of the assembly through airflow guided by a center guide disc and discharges the heat to the external environment. Through the synergistic effect of the active heat dissipation assembly, the central guide disc and the heat dissipation channel of the aluminum alloy frame, the problem of heat accumulation in the central area of the solar cell assembly is solved, the hot spot effect is avoided, the photoelectric conversion efficiency and the operation stability of the assembly are improved, and the solar cell assembly is suitable for a photovoltaic power generation system under complex environmental conditions.

Description

TECHNICAL FIELD

[0001] The utility model relates to solar cell module technical field, concretely is a kind of TOPCon type solar cell module. BACKGROUND

[0002] TOPCon battery belongs to a kind of solar cell. Specifically, it is a kind of Tunnel Oxide Passivated Contact (TOPCon) solar cell technology based on selective carrier principle. TOPCon battery adopts N-type silicon operating system, and a layer of ultra-thin silicon oxide and a layer of doped silicon thin layer are prepared inside, which form a passivation contact structure together, can effectively reduce surface recombination battery and metal contact recombination, thereby improving conversion efficiency.

[0003] At present, the traditional solar cell module is usually composed of front glass, back glass, photovoltaic cell layer, packaging material and aluminum alloy frame. Its heat dissipation mainly relies on natural convection or radiation heat dissipation mode, and the heat is slowly conducted to the external environment through the glass surface and the frame. However, during the operation of photovoltaic module, especially under high temperature and strong light conditions, a large amount of heat will be generated in the central area of the cell, which will cause the temperature of the central area of the module to rise and form "hot spot effect". This effect not only reduces the photoelectric conversion efficiency, but also may cause local overheating damage of the module and even fire risk.

[0004] In the conventional technical solution, although a simple heat dissipation structure or a filling heat conductive material is designed in the aluminum alloy frame to assist heat dissipation, these designs are mostly passive heat dissipation, which cannot cope with the continuous high heat generated during the operation of the module, especially in the case of heat accumulation in the central area. Passive heat dissipation means is difficult to quickly conduct heat to the outside of the frame. In addition, due to the lack of active heat dissipation mechanism, the heat dissipation efficiency depends on the environmental temperature and air flow conditions, and it is difficult to ensure the stable operation of the module in extreme climate environment.

[0005] Therefore, the existing problems are studied and improved, and a TOPCon type solar cell module is provided to solve the existing problems, and the purpose of solving the problems and improving the practical value is achieved through the technology. INVENTION CONTENTS

[0006] The utility model relates to solar photovoltaic module field, concretely relates to a kind of high-efficiency heat dissipation's TOPCon type solar cell module, for solving the "hot spot effect" problem caused by heat accumulation in central area during the operation of existing solar cell module, and the technical problems, such as insufficient efficiency of traditional passive heat dissipation mode, temperature control is not accurate.

[0007] The utility model discloses a TOPCon type solar cell module includes front glass, back glass and the TOPCon solar cell piece layer between both. The photovoltaic cell piece layer is encapsulated through upper EVA encapsulating film and lower EVA encapsulating film, and is fixed in the aluminum alloy frame. The inside of aluminum alloy frame is provided with heat dissipation channel, is used for exporting heat from the component edge.

[0008] The utility model discloses an innovation lies in adopting active heat dissipation assembly and center guide disc structure to realize the efficient heat dissipation of center area.

[0009] Active heat dissipation assembly is fixed on the bottom surface of back glass, including centrifugal fan and the flow guide pipe that communicates with the air outlet of centrifugal fan. Centrifugal fan exports the heat of center area rapidly through flow guide pipe and is connected with the heat dissipation channel of aluminum alloy frame, and further heat conduction is conducted to the edge area to dissipate to external environment.

[0010] Center guide disc is fixed on the bottom surface of TOPCon solar cell piece layer, and the bottom end is sleeved on the inside of active heat dissipation assembly. Center guide disc is equipped with multiple radial distribution air inlets, and the air inlet gradually reduces along the radial inward cross section area, is used to guide air to enter the inside of component, and is communicated with active heat dissipation assembly through air guide hole, forms stable air circulation. Center guide disc adopts composite ceramic material, and has excellent high temperature resistance and heat conduction performance.

[0011] Aluminum alloy frame is equipped with heat dissipation channel in the inside, and the end of channel is equipped with the communicating port, is used to connect external gear pump or heat exchanger. Gear pump is circulated through the rotation of the heat conduction medium (such as high heat conduction oil or cooling liquid), and the heat of the inside of component is conducted to the outside of frame or heat exchanger and is cooled efficiently.

[0012] The input end of centrifugal fan is connected with intelligent temperature control system. When the temperature of component exceeds the set threshold value, intelligent temperature control system starts centrifugal fan, and dynamically adjusts the heat dissipation process, to ensure that component maintains stable temperature while operating efficiently.

[0013] The utility model discloses the obtained beneficial effect is as follows:

[0014] 1. In the utility model, the centrifugal fan in active heat dissipation assembly can quickly take away the heat of the center area of component through the air guide design of flow guide pipe and center guide disc, effectively relieves " hot spot effect " caused by the heat accumulation of center area, and further carries out edge heat dissipation through the heat dissipation channel in the inside of aluminum alloy frame, to improve the overall photoelectric conversion efficiency of component.

[0015] 2. In the utility model, the combination design of centrifugal fan and flow guide pipe in active heat dissipation assembly can quickly export heat from the back of component, and realizes the automation and accurate control of heat dissipation process through intelligent temperature control system, to guarantee the long-term stable operation of component.BRIEF DESCRIPTION OF DRAWINGS BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the whole structure schematic view of one embodiment of the utility model;

[0017] Figure 2 It is the active heat dissipation assembly and center guide disc section structure schematic view of one embodiment of the utility model;

[0018] Figure 3 It is the center guide disc local section structure schematic view of one embodiment of the utility model.

[0019] Reference signs:

[0020] 1, front glass; 2, back glass; 3, TOPCon solar cell piece layer; 4, encapsulation layer; 5, aluminum alloy frame; 6, active heat dissipation assembly; 7, center guide disc; 61, centrifugal fan; 62, flow guide pipe; 71, air inlet; 72, air guide hole. DETAILED DESCRIPTION

[0021] To make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further explained in detail below in combination with specific implementation manners and with reference to the drawings. It should be explained that the embodiments of the utility model and the features in the embodiments can be combined mutually in the case of no conflict.

[0022] It is understood that these descriptions are only exemplary, and are not intended to limit the scope of the utility model.

[0023] Some embodiments of the utility model are described below in combination with the drawings to provide a TOPCon type solar cell module.

[0024] As Figure 1 Indicated, the utility model provides a kind of high-efficiency heat dissipation TOPCon type solar cell module, comprising: comprising: front glass 1 and back glass 2, for encapsulating component;

[0025] TOPCon solar cell piece layer 3 being arranged between the front glass 1 and back glass 2;

[0026] Encapsulation layer 4 located on the TOPCon solar cell piece layer 3 upside and downside, including upper EVA encapsulation film and lower EVA encapsulation film;

[0027] Aluminum alloy frame 5 of the component edge is covered, and the aluminum alloy frame 5 inside is equipped with heat dissipation channel;

[0028] A center guide disc 7 fixed to the bottom surface of the TOPCon solar cell layer 3 and an active heat dissipation assembly 6 fixed to the bottom surface of the back glass 2, the bottom end of the center guide disc 7 is sleeved on the inner side of the active heat dissipation assembly 6, the inner side of the center guide disc 7 is provided with an air inlet 71, and one end of the air inlet 71 is communicated with a guide air hole 72 opposite to the inner side of the active heat dissipation assembly 6, the active heat dissipation assembly 6 includes a centrifugal fan 61 and a flow guide pipe 62 communicated with the air outlet of the centrifugal fan 61, one end of the flow guide pipe 62 is communicated with the port of the centrifugal fan 61, and the other end is away from the center guide disc 7 and the TOPCon solar cell layer 3.

[0029] The active heat dissipation assembly 6 includes a centrifugal fan 61 and a flow guide pipe 62 communicated with the air outlet of the centrifugal fan 61. The centrifugal fan generates air flow by high-speed rotation, and the hot air in the assembly is discharged to the external environment through the flow guide pipe 62 to avoid heat accumulation on the surface of the assembly. The active heat dissipation assembly 6 is controlled by an intelligent temperature control system. When the temperature of the assembly exceeds the set threshold, the centrifugal fan starts to quickly remove the heat in the central area of the assembly.

[0030] The center guide disc 7 is a composite ceramic disc structure, and the inner side is provided with a plurality of radially distributed air inlets 71. The air inlets gradually decrease in cross-sectional area radially inward, which can guide cold air into the central area of the assembly and connect with the centrifugal fan 61 through the guide air hole 72, forming an efficient air flow path to improve the heat dissipation efficiency of the central area.

[0031] As shown in Figure 2 To further optimize the heat dissipation performance of the assembly, the end of the heat dissipation channel in the aluminum alloy frame 5 is provided with a communication port for connecting an external gear pump. The gear pump pushes the heat-conducting medium in the heat dissipation channel through rotation to conduct heat from the inside of the assembly to the outside of the frame or a heat exchanger for heat dissipation. The heat-conducting medium has a thermal conductivity higher than 0.5 W / m·K, and also has high temperature resistance and low viscosity characteristics to ensure heat dissipation efficiency and stability.

[0032] Through the combination design of the heat dissipation channel of the aluminum alloy frame 5 and the external gear pump, the heat conduction capacity from the central area of the assembly to the outer edge of the frame is further improved, ensuring efficient operation of the heat dissipation system.

[0033] To further enhance intelligent control, the active heat dissipation assembly 6 dynamically adjusts its operating state through an intelligent temperature control system. When the temperature inside the assembly reaches the set threshold, the intelligent temperature control system starts the centrifugal fan 61 to quickly remove the heat inside the assembly through the air inlet 71 and the guide air hole 72 of the center guide disc 7. At the same time, the system will monitor the temperature change in the heat dissipation process in real time, and optimize the operating parameters of the centrifugal fan according to the environmental conditions, so as to reduce energy consumption while efficiently dissipating heat.

[0034] As shown in Figure 3To improve the heat dissipation efficiency and durability of the center guide disc 7, the guide disc is made of composite ceramic material, which has excellent high-temperature resistance and heat conduction performance. The bottom end of the guide disc is designed with a heat dissipation convex disc, which is tightly sleeved with the active heat dissipation assembly 6. The outer periphery of the heat dissipation convex disc is uniformly distributed with multiple air guide holes 72, which further optimize the guidance of air flow and the transfer of heat. The use of composite ceramic guide disc significantly improves the thermal stress resistance performance of the assembly, which helps to prolong the service life of the assembly.

[0035] Working principle

[0036] The air inlet 71 of the center guide disc 7 guides cold air into the center area of the assembly, and the centrifugal fan 61 draws hot air out of the inside of the assembly through negative pressure and discharges it to the external environment through the flow guide pipe 62. The active heat dissipation assembly 6 combines with the intelligent temperature control system to realize dynamic and efficient heat dissipation in the center area.

[0037] The aluminum alloy frame 5 is provided with a heat dissipation channel connected with the heat transfer path of the center area of the assembly. The external gear pump drives the circulation of the heat conduction medium, so that the heat conducted from the center area to the frame is quickly dissipated to the environment, forming a complete multi-level heat dissipation system from the center to the outer edge.

[0038] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "a specific embodiment" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0039] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A TOPCon type solar cell module, characterized by, The utility model relates to a kind of TOPCon solar module, including: Front glass (1) and back glass (2) for encapsulating assembly; TOPCon solar cell layer (3) is arranged between the front glass (1) and back glass (2); The encapsulating layer (4) on the TOPCon solar cell layer (3) includes upper EVA encapsulating film and lower EVA encapsulating film; Aluminum alloy frame (5) covers the edge of assembly, and the aluminum alloy frame (5) is provided with heat dissipation channel inside; Center guide disc (7) fixed to the bottom surface of TOPCon solar cell layer (3) and active heat dissipation assembly (6) fixed to the bottom surface of back glass (2), the bottom end of the center guide disc (7) is sleeved to the inside of active heat dissipation assembly (6), the inside of the center guide disc (7) is provided with air inlet (71), and one end of air inlet (71) is communicated with air guide hole (72) opposite to the inside of active heat dissipation assembly (6), and the active heat dissipation assembly (6) includes centrifugal fan (61) and flow guide pipe (62) communicated with the air outlet of centrifugal fan (61).

2. The TOPCon-type solar cell module according to claim 1, characterized in that, The end of the heat dissipation channel of the aluminum alloy frame (5) is provided with a communication port for connecting an external gear pump, which circulates the heat conducting medium by rotation to conduct heat from the central area of the assembly to the outside of the aluminum alloy frame or a heat exchanger.

3. The TOPCon-type solar cell module according to claim 2, characterized in that, The heat dissipation channel is filled with a heat conducting medium, which is high-thermal-conductivity oil or coolant with a thermal conductivity higher than 0.5 W / m·K and high-temperature resistance and low-viscosity characteristics to improve heat conduction efficiency.

4. The TOPCon-type solar cell module according to claim 1, characterized in that, The number of air inlets (71) on the inside of the center guide disc (7) is several, and they are uniformly distributed in the circumferential direction, the air inlets (71) are arranged in the radial direction and gradually tapered inward in the radial direction.

5. The TOPCon-type solar cell module according to claim 1, characterized in that, The center guide disc (7) is a composite ceramic disc structure, and the bottom end of the center guide disc (7) is provided with a heat dissipation convex disc sleeved to the active heat dissipation assembly (6), and the air guide holes (72) are uniformly distributed in the circumferential direction on the outer periphery of the heat dissipation convex disc.

6. The TOPCon-type solar cell module according to claim 1, characterized in that, The input end of the centrifugal fan (61) is electrically connected with an intelligent temperature control system, which starts the centrifugal fan (61) when the temperature of the assembly exceeds the set threshold and monitors the temperature change in real time.

7. The TOPCon-type solar cell module according to claim 1, characterized in that, One end of the flow guide pipe (62) is communicated with the port of the centrifugal fan (61), and the other end is away from the center guide disc (7) and the TOPCon solar cell layer (3).

Images