Solar cell piece with good conductivity and connecting assembly thereof
The copper layer is deposited on the surface of the solar cell by chemical deposition method, and the sliding connection components are used to achieve rapid installation and separation, which solves the problems of high PVD sputtering costs and damage to the connection method, improves production capacity and connection strength, and reduces production costs and Environmental impact.
Patent Information
- Application Number
- CN202420078184.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-12
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-01-12
AI Technical Summary
During the production process of existing solar cell cells, PVD sputtering technology is costly and has low production capacity, and there are problems of damage and insufficient connection strength for connection methods such as welding and mechanical clamping.
Chemical deposition method is used to deposit metal copper layers on the surface of solar cell cells, and quickly install and separate through sliding connection components to avoid damage to high-temperature molten metals and insufficient connection strength.
Reduces production costs, increases production capacity, and avoids battery damage and environmental impact through rapid installation and separation.
Smart Images
Figure CN222356865U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of solar cell sheets, in particular to a solar cell sheet with good conductivity and a connecting component thereof. Background Art
[0002] Solar cells, as the core components of solar power conversion, can convert solar energy into direct current electricity. This process is based on the photovoltaic effect, that is, when light shines on the solar cell, the photon energy will excite the electrons from the bound state to the free state, thereby generating current. At present, crystalline silicon solar cells are the mainstream products on the market, with high photoelectric conversion efficiency and long life;
[0003] In the production process of solar cells in the prior art, a 100nm thick copper layer is formed on the surface of the cell by PVD sputtering or evaporation metal layer technology to provide a conductive layer for subsequent processes to achieve a conductive effect; however, the PVD equipment is expensive and has low production capacity;
[0004] In addition, at present, the connection between two solar cells mainly relies on welding or mechanical clamping. Welding is a process of connecting cells together through molten metal, which has high connection strength and stability, while mechanical clamping is to fix the cells together through clamps or brackets. This method is relatively simple, but the connection strength is low. Although the existing connection methods have met the connection requirements of solar cells to a certain extent, they still have the problem of inconvenient connection. First, the welding process requires high-temperature molten metal, which may not only cause damage to the cell itself, but also increase production costs and time. Second, the operation of the mechanical clamping method is relatively simple, but the connection strength is low and it is easily affected by vibration or environmental factors. Utility Model Content
[0005] In order to solve the problem in the prior art that two solar panels are complicated to connect with each other and are easy to damage the battery, the utility model provides a solar cell sheet with good conductivity and a connection assembly thereof;
[0006] On the one hand, the utility model provides a solar cell with good conductivity, which adopts the following technical solution:
[0007] A solar cell with good conductivity, comprising a cell, a frame characterized in that the cell comprises a cell substrate, a grid line is arranged on the surface of the cell substrate; a chemical copper layer is attached to the surface of the cell substrate by chemical deposition; a glue layer is sprayed on the surface of the chemical copper layer; a conductive layer is arranged on the surface of the glue layer by electroplating;
[0008] Preferably, the thickness of the chemical copper layer is 0.5 μm to 1.5 μm;
[0009] Preferably, the thickness of the adhesive layer is 9 μm to 11 μm;
[0010] Preferably, the conductive layer is electroplated copper and has a thickness of 9 μm to 11 μm;
[0011] On the other hand, a connection assembly includes a first mounting frame and a second mounting frame, wherein the connection assembly is used for connecting any of the above-mentioned solar cells with good conductivity to each other;
[0012] Preferably, the first mounting bracket and the second mounting bracket are arranged on opposite side walls of the frame through a sliding connection and are locked by bolts; a locking device is arranged inside the second mounting bracket;
[0013] Preferably, the number of the locking devices is N, where N≥2;
[0014] Preferably, the locking device comprises a lock box, an outer wall of the second mounting frame is welded with a lock box; the lock box is connected to the interior of the second mounting frame; the inner wall of the lock box is welded with a partition; the outer wall of the outer wall of the partition is welded with a sleeve; the number of the sleeves is two, and the two sleeves are respectively arranged on the opposite side walls of the partition; one end of the spring is welded to the inner wall of the sleeve, and the other end of the spring is welded to one end of the lock block; the other end of the lock block passes through the outer wall of the lock box and extends to the outside of the lock box; one end of the connecting rod is welded to the outer wall of the lock block; the other end of the connecting rod extends to the second mounting frame and is welded with a detent rod; a sliding groove is provided at the top of the second mounting frame; the top of the detent rod passes through the sliding groove and extends to the upper side of the second mounting frame and is welded with a detent rod; the outer wall of the sleeve is provided with a groove for the sliding of the connecting rod;
[0015] Preferably, the locking block is a right-angled trapezoidal structure with an arc-shaped inclined surface;
[0016] Preferably, a limiting groove is provided inside the connecting rod, and a limiting rod is welded inside the second mounting frame; the limiting rod slides in the limiting groove;
[0017] Preferably, a plurality of brackets are welded on the top of the second mounting frame corresponding to the locking device, each bracket has two brackets, a guide rod is welded between the two brackets, the guide rod passes through the lever, and the lever can slide on the outer side wall of the guide rod;
[0018] Preferably, an outer side wall of the first mounting frame is provided with a slot for inserting a lock box corresponding to the locking device; and an inner side wall of the slot is provided with a locking groove corresponding to the locking block.
[0019] In summary, the beneficial effects of the utility model are:
[0020] The utility model utilizes a chemical deposition method to quickly deposit a metal copper layer on the surface of the battery cell, and adds a connecting component, and utilizes the mutual cooperation of the first mounting frame and the second mounting frame to realize the rapid installation of the two battery cells; during installation, the lock is directly connected to the slot by the lock, and the lock box is inserted into the slot. The locking block with a right-angled trapezoidal structure whose inclined surface is an arc shape is squeezed to squeeze the side wall of the slot and the spring to shrink the locking block to the inside of the lock box. When the locking block reaches the locking groove, the spring recovers and the locking block is ejected into the locking groove to realize the docking of the two battery cells; when the two battery cells need to be separated, the user only needs to press the corresponding paddle, and the paddle drives the connecting rod and the locking block, squeezes the spring, and makes the locking block disengage from the locking groove, so as to realize the separation of the two battery cells; through the utility model, on the one hand, it replaces the existing technology of PVD sputtering to make battery cells, and the new structure of the battery cell cooperates with the processing method to better save costs and improve production capacity.
[0021] On the other hand, by setting up the connection components, damage to the battery cells themselves is avoided, and the connection is quick and convenient, while also avoiding the influence of the external environment to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a schematic diagram of the overall structure of the battery cell of the utility model;
[0023] Figure 2 For this utility model Figure 1 A magnified schematic diagram of part A;
[0024] Figure 3 It is a schematic diagram of the flat angle of the overall structure of the utility model;
[0025] Figure 4 For this utility model Figure 3 A magnified schematic diagram of part B;
[0026] Figure 5 It is a vertical angle schematic diagram of the overall structure of the utility model;
[0027] Figure 6 For this utility model Figure 5 A magnified schematic diagram of part C;
[0028] Figure 7 It is a schematic diagram of the overall structure of the locking device of the utility model.
[0029] As shown in the figure: 1-battery substrate, 11-grid line, 12-chemical copper layer, 13-glue layer, 14-conductive layer, 2-frame, 3-first mounting frame, 31-second mounting frame; 311-lock box, 4-partition, 41-sleeve, 42-spring, 43-lock block, 44-connecting rod, 45-limiting groove, 46-limiting column, 5-slide groove, 51-paddle, 52-paddle, 6-bracket, 61-guide rod, 7-slot, 71-locking groove. DETAILED DESCRIPTION
[0030] The following is combined with Figure 1-7 The utility model is further described in detail:
[0031] The utility model discloses a solar cell with good conductivity and a connecting assembly thereof, such as Figure 1 , Figure 2As shown, a solar cell with good conductivity includes a cell, and a frame 2 is characterized in that the solar cell cell includes a cell substrate 1, and a grid line 11 is arranged on the surface of the solar cell cell substrate 1; a chemical copper layer 12 is attached to the surface of the solar cell cell substrate 1 by chemical deposition; a glue layer 13 is sprayed on the surface of the solar cell chemical copper layer 12; a conductive layer 14 is arranged on the surface of the solar cell glue layer 13 by electroplating; the thickness of the solar cell chemical copper layer 12 is 0.5μm-1.5μm; the thickness of the solar cell glue layer 13 is 9μm-11μm; the solar cell conductive layer 14 is electroplated copper, and the thickness is 9μm-11μm; in this embodiment, the preparation of the solar cell, firstly, the surface of the cell is cleaned with 10-30% hydrofluoric acid for 5-15 minutes to remove surface oxides, etc.; then, it is cleaned with pure water, and the cell is passed through a catalyst tank, and the catalysis is to prepare for the subsequent chemical copper so that copper ions can be replaced, which is a palladium salt (palladium chloride, palladium sulfate, palladium acetate), silver or silver salt (silver nitrate ) as the main ingredients; chemical copper is a chemical copper solution of sodium tartrate system or EDTA system (mainly composed of copper ions, formaldehyde, sodium hydroxide, chelating agent and stabilizer) to quickly deposit a chemical copper layer 12 with a target thickness of 0.5μm to 1.5μm. In this embodiment, the chemical copper layer 12 is preferably 1μm; the glue coating is to select a mature positive photoresist on the market, and under the action of a sprayer, a uniform glue layer 13 with a thickness of 9μm to 11μm is sprayed on the surface of the battery substrate 1; the thickness of the glue layer 13 in this embodiment is Preferably, the thickness of the gate line 11 is 10 μm; then, the gate line 11 to be electroplated is exposed by an exposure machine, and the gate line 11 is developed under the action of a developer; the electroplating copper is a plating solution of a copper sulfate system (containing 10-20% sulfuric acid, 5-20% copper sulfate, 30-80 ppm chloride ions, and a number of copper plating additives), a pyrophosphate copper system, or an alkaline copper plating system; at a current density of 10 ASD, the copper layer of the gate line 11, that is, the conductive layer 14, is thickened to 9 μm to 11 μm; in this embodiment, the thickness of the conductive layer 14 is preferably 10 μm;
[0032] like Figure 3-Figure 7 As shown, a connection assembly includes a first mounting frame 3 and a second mounting frame 31, characterized in that the solar cell connection assembly is used for the mutual docking between any of the above-mentioned solar cells with good conductivity; the first mounting frame 3 and the second mounting frame 31 of the solar cell are arranged on the opposite side walls of the frame 2 through a sliding connection and are locked by bolts; a locking device is arranged inside the second mounting frame 31 of the solar cell; in this embodiment, since the solar cells of the prior art are not convenient for mutual docking and installation, the second mounting frame 31 of the solar cell can be docked with the first mounting plate of another solar cell through the locking device of the utility model, thereby increasing the scope of application
[0033] like Figure 3-Figure 7 As shown, the number of solar cell locking devices is N, N ≥ 2; in this embodiment, the number of locking devices is selected according to the size of the applied solar cell; in this embodiment, two are preferred.
[0034] like Figure 3-Figure 7As shown, the solar cell locking device includes a lock box 311, and the outer side wall of the second solar cell mounting frame 31 is welded with the lock box 311; the solar cell lock box 311 is connected to the inside of the second mounting frame 31; the inner side wall of the solar cell lock box 311 is welded with a partition 4; the outer side wall of the solar cell partition 4 is welded with a sleeve 41; the number of solar cell sleeves 41 is two, and the two solar cell sleeves 41 are respectively arranged on the opposite side walls of the partition 4; the inner side wall of the solar cell sleeve 41 is welded with one end of the spring 42, and the other end of the solar cell spring 42 is welded with one end of the lock block 43; the solar cell lock block The other end of 43 penetrates the outer wall of the lock box 311 and extends to the outside of the lock box 311; one end of the connecting rod 44 is welded to the outer wall of the solar cell lock block 43; the other end of the solar cell connecting rod 44 extends to the second mounting frame 31 and is welded with a lever 51; a slide groove 5 is provided on the top of the second solar cell mounting frame 31; the top of the lever 51 penetrates the slide groove 5 and extends to the upper side of the second mounting frame 31 and is welded with a lever 51; a groove for sliding the connecting rod 44 is provided on the outer wall of the solar cell sleeve 41; the solar cell lock block 43 is a right-angle trapezoidal structure with an arc-shaped inclined surface; a limiting groove 45 is provided inside the solar cell connecting rod 44, and the solar cell A limiting rod is welded inside the second solar cell mounting frame 31; the solar cell limiting rod slides in the limiting groove 45; a plurality of groups of brackets 6 are welded on the top of the second solar cell mounting frame 31 corresponding to the locking device, and each group of solar cell brackets 6 has two, and a guide rod 61 is welded between the two solar cell brackets 6, and the solar cell guide rod 61 passes through the lever 51, and the lever 51 can slide on the outer wall of the guide rod 61; the outer wall of the first solar cell mounting frame 3 corresponds to the locking device and is provided with a slot 7 for inserting the lock box 311; the inner wall of the solar cell slot 7 corresponds to the lock block 43 and is provided with a locking slot 71. In this embodiment, When it is necessary to dock and install two battery cells, the lock is directly used to dock with the slot 7, and the lock box 311 is inserted into the slot 7. The lock block 43 with a right-angle trapezoidal structure with an arc-shaped inclined surface squeezes the side wall of the slot 7 and squeezes the spring 42 to shrink the lock block 43 to the inside of the lock box 311. When the lock block 43 reaches the locking groove 71, the spring 42 recovers and bounces the lock block 43 into the locking groove 71 to achieve docking of the two battery cells; when it is necessary to separate the two battery cells, the user only needs to press the corresponding paddle 52, and the paddle 52 drives the connecting rod 44 and the lock block 43, squeezes the spring 42, and makes the lock block 43 disengage from the locking groove 71, so as to achieve the separation of the two battery cells;
[0035] It is also worth noting that the limiting groove 45 and the limiting column 46 are used to stabilize the sliding of the connecting rod 44 and prevent the connecting rod 44 from deforming. In addition, the guide rod 61 promotes the linear movement of the lever 51, making it easier for the user to move the paddle 52.
[0036] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The various components mentioned in the utility model are common technologies in the existing field. The technicians in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only to illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.
Claims
1. A solar cell with good conductivity, comprising a solar cell, a frame (2) characterized in that: The battery cell comprises a battery substrate (1), a grid line (11) being arranged on the surface of the battery substrate (1); a chemical copper layer (12) being attached to the surface of the battery substrate (1) by chemical deposition; a glue layer (13) being sprayed on the surface of the chemical copper layer (12); and a conductive layer (14) being arranged on the surface of the glue layer (13) by electroplating.
2. A solar cell with good conductivity according to claim 1, characterized in that The thickness of the chemical copper layer (12) is 0.5 μm to 1.5 μm; the thickness of the adhesive layer (13) is 9 μm to 11 μm; and the conductive layer (14) is electroplated copper with a thickness of 9 μm to 11 μm.
3. A connection assembly, comprising a first mounting frame (3) and a second mounting frame (31), characterized in that: The connection assembly is used for connecting any one of the solar cells with good conductivity in claims 1-2.
4. A connection assembly according to claim 3, characterized in that The first mounting frame (3) and the second mounting frame (31) are arranged on opposite side walls of the frame (2) through a sliding connection and are locked by bolts; a locking device is arranged inside the second mounting frame (31).
5. A connection assembly according to claim 4, characterized in that The number of the locking devices is N, where N≥2.
6. A connection assembly according to claim 5, characterized in that The locking device comprises a lock box (311), the outer wall of the second mounting frame (31) is welded with the lock box (311); the lock box (311) is communicated with the interior of the second mounting frame (31); the inner wall of the lock box (311) is welded with a partition (4); the outer wall of the partition (4) is welded with a sleeve (41); the number of the sleeves (41) is two, and the two sleeves (41) are respectively arranged on opposite side walls of the partition (4); the inner wall of the sleeve (41) is welded with one end of a spring (42), and the other end of the spring (42) is welded with a lock The locking block (43) is provided at one end thereof; the other end of the locking block (43) penetrates through the outer wall of the lock box (311) and extends to the outside of the lock box (311); one end of a connecting rod (44) is welded to the outer wall of the locking block (43); the other end of the connecting rod (44) extends to the inside of the second mounting frame (31) and is welded with a lever (51); a sliding groove (5) is provided at the top of the second mounting frame (31); the top of the lever (51) penetrates through the sliding groove (5) and extends to the upper side of the second mounting frame (31) and is welded with the lever (51); the outer wall of the sleeve (41) is provided with a groove for the connecting rod (44) to slide.
7. A connection assembly according to claim 6, characterized in that The locking block (43) is a right-angled trapezoidal structure with an arc-shaped inclined surface.
8. A connection assembly according to claim 6, characterized in that A limiting groove (45) is provided inside the connecting rod (44), and a limiting rod is welded inside the second mounting frame (31); the limiting rod slides in the limiting groove (45).
9. A connection assembly according to claim 6, characterized in that A plurality of groups of brackets (6) are welded to the top of the second mounting frame (31) corresponding to the locking device, each group of the brackets (6) having two brackets, a guide rod (61) is welded between the two brackets (6), the guide rod (61) passes through the lever (51), and the lever (51) can slide on the outer side wall of the guide rod (61).
10. A connection assembly according to claim 6, characterized in that The outer side wall of the first mounting frame (3) is provided with a slot (7) for inserting a lock box (311) corresponding to the locking device; the inner side wall of the slot (7) is provided with a locking groove (71) corresponding to the locking block (43).