HJT cell screen

Abstract

This utility model provides an HJT battery screen, belonging to the field of HJT battery production technology. It includes a screen assembly comprising a frame, a support strip adhered to the side wall of the frame, a plate fixedly connected to the end of the support strip, and a forming hole located in the center of the plate. The end of the support strip is adhered to the lower side wall of the plate, and a connecting strip is adhered to the upper side wall of the plate. A positioning assembly includes a locking block inserted into the side wall of the frame, a nest inserted into the bottom of the frame, and a positioning sleeve inserted into the upper end of the frame. The advantages of this utility model are: the screen assembly, through its reinforced structure and epoxy resin sealing, effectively controls plate deformation, ensuring stable forming hole position, meeting the high-precision electrode printing requirements of HJT batteries, adapting to different specifications of printing equipment, improving plate fatigue resistance, extending screen life, adapting to HJT battery substrates of different sizes, eliminating the need to replace the screen frame, and reducing production costs.

Description

Technical Field

[0001] This utility model belongs to the field of HJT battery production technology, specifically relating to an HJT battery screen. Background Technology

[0002] Heterojunction (HJT) cells, as a new generation of high-efficiency photovoltaic cell technology, have become a core direction for cost reduction and efficiency improvement in the photovoltaic industry due to their high open-circuit voltage (≥750mV), high conversion efficiency (mass production efficiency exceeding 26%), and excellent temperature coefficient (-0.26% / ℃). Their core advantages stem from the unique design of the "amorphous silicon / crystalline silicon heterojunction" structure. Electrode printing, as a key step in HJT cell fabrication, directly determines the cell's series resistance, shading area, and interface contact quality, affecting the final efficiency by up to 2-3 percentage points.

[0003] In existing battery production, traditional screen printing plates (the core printing component) are mostly fixed with a single support strip. The support structure is linearly distributed, which is prone to local deformation under printing pressure, resulting in the displacement of the forming hole position and defects such as "line expansion" and "line breakage" in the electrode pattern. Utility Model Content

[0004] The purpose of this invention is to provide an HJT battery mesh plate, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: An HJT battery mesh includes, The panel assembly includes a frame, a support strip attached to the side wall of the frame, a plate fixedly connected to the end of the support strip, and a forming hole provided in the center of the plate. The end of the support strip is attached to the lower side wall of the plate, and a connecting strip is attached to the upper side wall of the plate. The end of the connecting strip is attached to the side wall of the support strip. The connecting strip and the side wall of the support strip are coated with epoxy resin adhesive for use, and the epoxy resin adhesive extends to the side wall of the plate. The positioning component includes a locking block inserted into the side wall of the frame, a nest inserted into the bottom of the frame, and a positioning sleeve inserted into the upper end of the frame. The end of the positioning sleeve is threaded to the end of the nest, and the nest and the center of the positioning sleeve are provided with a through hole for cooperation.

[0006] As a preferred embodiment of this utility model, the upper end face of the positioning sleeve is flush with the upper end face of the frame, and the central side wall of the positioning sleeve is provided with an arc-shaped edge.

[0007] As a preferred embodiment of this utility model, the side wall of the card block has a stepped edge structure, the card block is tightly inserted into the side wall of the frame, and a sealing gasket that cooperates with the card block is installed on the inner side of the frame.

[0008] As a preferred embodiment of the present invention, the positioning component further includes a connecting rod inserted into the interior of the frame, and a gear rotatably installed at the center position inside the frame. The end of the connecting rod is provided with a rack structure that meshes with the side wall of the gear, and the connecting rod is symmetrically arranged on both sides of the gear.

[0009] In a preferred embodiment of this utility model, a worm gear is rotatably mounted on the side wall of the frame, and a worm wheel that works in conjunction with the worm gear is fixedly connected to the end of the gear, with the side wall of the worm gear meshing with the side wall of the worm wheel.

[0010] As a preferred embodiment of this utility model, a knob is rotatably mounted on the side wall of the frame, the knob is fixedly connected to the end of the worm gear, and the side wall of the frame is provided with a clearance groove for cooperating with the knob, and the end of the knob does not extend beyond the side wall of the frame.

[0011] As a preferred embodiment of this utility model, the knob sidewall is threaded with a handle bolt, and the end of the handle bolt is engaged with the sidewall of the frame.

[0012] Compared with the prior art, the beneficial effects of this utility model are: the plate assembly effectively controls plate deformation through reinforced structure and epoxy resin sealing, ensures stable forming hole position, meets the high-precision electrode printing requirements of HJT batteries, is compatible with printing equipment of different specifications, improves plate fatigue resistance, extends screen life, can be adapted to HJT battery substrates of different sizes, eliminates the need to replace screen frame, and reduces production costs. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments 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. Wherein: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a three-dimensional structural diagram of the present invention from a downward viewing angle; Figure 3 This is a schematic diagram of the internal component structure of this utility model; Figure 4 This is a schematic diagram of the plate connection structure of this utility model.

[0014] In the diagram: 100, plate assembly; 101, frame; 102, support belt; 103, plate; 104, forming hole; 105, connecting belt; 200, positioning assembly; 201, locking block; 202, nesting; 203, positioning sleeve; 204, connecting rod; 205, gear; 206, worm gear; 207, worm wheel; 208, knob; 209, handle bolt. Detailed Implementation

[0015] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0016] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0017] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0018] Example Reference Figure 1-4 This is an embodiment of the present invention, which provides an HJT battery mesh plate, including, The panel assembly 100 includes a frame 101, a support strip 102 attached to the side wall of the frame 101, a plate 103 fixedly connected to the end of the support strip 102, and a molding hole 104 provided in the center of the plate 103. The end of the support strip 102 is attached to the lower side wall of the plate 103, and a connecting strip 105 is attached to the upper side wall of the plate 103. The end of the connecting strip 105 is attached to the side wall of the support strip 102. The connecting strip 105 and the side wall of the support strip 102 are coated with epoxy resin adhesive for use, and the epoxy resin adhesive extends to the side wall of the plate 103. The positioning component 200 includes a locking block 201 inserted into the side wall of the frame 101, a nest 202 inserted into the bottom of the frame 101, and a positioning sleeve 203 inserted into the upper end of the frame 101. The end of the positioning sleeve 203 is threadedly connected to the end of the nest 202, and the nest 202 and the positioning sleeve 203 have a through hole for cooperation at their center.

[0019] The plate assembly 100 is a key component for printing the electrode patterns on HJT batteries. The frame 101 serves as the overall support skeleton, providing an installation reference for other components. Support strips 102 (made of high-tensile polyester material) are radially distributed on its sidewalls, with their ends directly attached to the lower sidewall of the plate 103, forming the main load-bearing support for the plate. The plate 103 is an ultra-thin metal mesh (thickness ≤ 0.1 mm), with a centrally located forming hole 104 serving as the printing channel for the battery electrode patterns (the hole shape matches the electrode design), a core structure determining printing accuracy. A connecting strip 105 is attached to the upper sidewall of the plate 103, connecting to the sidewall of the support strip 102 at its end, forming a stable triangular structure of "support strip-plate-connecting strip" (utilizing the principle of triangular stability). The connecting surfaces of the connecting strip 105 and the support strip 102, as well as the sidewall of the plate 103, are coated with epoxy resin, extending to the edge of the plate. This enhances adhesion strength (peel strength ≥ 5 N / cm) and seals gaps to prevent printing ink leakage. The card block 201 is inserted into the side wall of the frame 101. The side wall has a stepped edge structure, which cooperates with the card slot of the printing equipment to achieve horizontal positioning. The nest 202 and the positioning sleeve 203 are respectively inserted into the bottom and top of the frame 101. The central through holes of the two are aligned (the hole diameter matches the positioning rod of the equipment), and the longitudinal positioning is achieved by threaded connection.

[0020] Specifically, the upper surface of the positioning sleeve 203 is flush with the upper surface of the frame 101, and the center side wall of the positioning sleeve 203 has an arc-shaped edge.

[0021] The upper surface of the positioning sleeve 203 is flush with the frame 101 to avoid the protruding structure from interfering with the operation of the printing equipment, while the arc-shaped edge of the central sidewall facilitates the insertion of the positioning rod.

[0022] Furthermore, the side wall of the card block 201 is provided with a stepped edge structure, the card block 201 is tightly inserted into the side wall of the frame 101, and a sealing gasket that cooperates with the card block 201 is installed on the inner side of the frame 101.

[0023] The sealing gasket on the inner side of the frame 101 fits tightly with the locking block to prevent materials from entering the frame 101 and to facilitate cleaning of the frame 101.

[0024] Furthermore, the positioning component 200 also includes a connecting rod 204 inserted inside the frame 101, and a gear 205 rotatably installed at the center position inside the frame 101. The end of the connecting rod 204 is provided with a rack structure that meshes with the side wall of the gear 205, and the connecting rod 204 is symmetrically arranged on both sides of the gear 205.

[0025] The frame 101 has symmetrically arranged connecting rods 204 inside, and the end rack meshes with the central gear 205 to form a "gear-double rack" linkage structure. Rotating the gear 205 can drive the connecting rods 204 on both sides to move synchronously in opposite directions, thereby adjusting the extension length of the card block 201 (to adapt to the card slot spacing of different equipment).

[0026] Preferably, a worm gear 206 is rotatably mounted on the side wall of the frame 101, and a worm wheel 207 that works with the worm gear 206 is fixedly connected to the end of the gear 205. The side wall of the worm gear 206 meshes with the side wall of the worm wheel 207. A knob 208 is rotatably mounted on the side wall of the frame 101. The knob 208 is fixedly connected to the end of the worm gear 206, and the side wall of the frame 101 has a clearance groove that works with the knob 208. The end of the knob 208 does not extend beyond the side wall of the frame 101.

[0027] The worm 206 meshes with the worm wheel 207 (the worm wheel is fixed to the end of the gear 205), and the knob 208 is fixed to the end of the worm. The gear 205 is finely adjusted through the "worm-worm wheel" reduction transmission (transmission ratio ≥10:1) (rotating the knob 1 turn, the gear rotates 6°), ensuring the positioning accuracy of the locking block (adjustment error ≤0.01mm).

[0028] Preferably, the knob 208 has a handle bolt 209 threadedly connected to its side wall, and the end of the handle bolt 209 is engaged with the side wall of the frame 101.

[0029] The handle bolt 209 is threaded to the side wall of the knob and its end is snapped into the frame 101 to lock the adjusted position and prevent accidental activation of the knob 208.

[0030] In use, align the nest 202 at the bottom of the frame 101 with the positioning rod of the printing equipment, insert it, and tighten the positioning sleeve 203 to fix the longitudinal position through the threaded connection; at the same time, the locking block 201 on the side wall of the frame 101 initially engages with the equipment slot to achieve lateral pre-positioning. If a deviation between the screen and the substrate is detected, loosen the handle bolt 209, rotate the knob 208 to drive the worm gear 206 to rotate, the worm gear drives the worm wheel 207 and gear 205 to rotate, and the gear drives the connecting rods 204 on both sides to extend and retract synchronously through the rack, thereby adjusting the lateral extension of the locking block 201 until the forming hole 104 is completely aligned with the substrate pattern; after adjustment, tighten the handle bolt 209 to lock the knob position to prevent loosening.

[0031] During printing, the paste is transferred to the surface of the HJT battery substrate through the forming holes 104 of the plate 103: In the plate assembly, the triangular structure formed by the support belt 102 and the connecting belt 105 offsets the printing pressure (≤0.5N / cm). 2 The deformation force generated by the forming hole 104 ensures that the plate 103 is flat (flatness error ≤ 0.05 mm / m) and avoids the printing pattern from being distorted due to the offset of the forming hole 104.

[0032] In summary, the plate assembly effectively controls plate deformation and ensures the stable position of the forming hole 104 through a triangular reinforcement structure of "support strip-connecting strip" and epoxy resin sealing, meeting the high-precision electrode printing requirements of HJT batteries. It enables micro-adjustment of the clamping blocks, adapting to different printing equipment specifications, and the knob locking function prevents loosening during operation, improving positioning reliability.

[0033] The dual support design of the support belt and the connecting belt, combined with the reinforced bonding of epoxy resin, improves the fatigue resistance of the sheet and extends the service life of the screen.

[0034] By adjusting the extension of the card block and the fit between the positioning sleeve and the nest, it can be adapted to HJT battery substrates of different sizes (compatible with 120-210mm silicon wafers) without the need to replace the stencil frame, thus reducing production costs.

[0035] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0036] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0037] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A HJT cell reticle, characterized in that: include, The panel assembly (100) includes a frame (101), a support strip (102) attached to the side wall of the frame (101), a plate (103) fixedly connected to the end of the support strip (102), and a molding hole (104) provided in the center of the plate (103). The end of the support strip (102) is attached to the lower side wall of the plate (103), and a connecting strip (105) is attached to the upper side wall of the plate (103). The end of the connecting strip (105) is attached to the side wall of the support strip (102). The connecting strip (105) and the side wall of the support strip (102) are coated with epoxy resin adhesive for use, and the epoxy resin adhesive extends to the side wall of the plate (103). The positioning component (200) includes a locking block (201) inserted into the side wall of the frame (101), a nest (202) inserted into the bottom of the frame (101), and a positioning sleeve (203) inserted into the upper end of the frame (101). The end of the positioning sleeve (203) is threaded to the end of the nest (202), and the nest (202) and the positioning sleeve (203) have a through hole for cooperation.

2. The HJT cell reticle of claim 1, wherein: The upper surface of the positioning sleeve (203) is flush with the upper surface of the frame (101), and the center sidewall of the positioning sleeve (203) has an arc-shaped edge.

3. The HJT cell reticle of claim 2, wherein: The side wall of the card block (201) is provided with a stepped edge structure. The card block (201) is tightly inserted into the side wall of the frame (101), and a sealing gasket that cooperates with the card block (201) is installed on the inner side of the frame (101).

4. The HJT cell reticle of claim 3, wherein: The positioning component (200) also includes a connecting rod (204) inserted inside the frame (101) and a gear (205) rotatably installed at the center position inside the frame (101). The end of the connecting rod (204) is provided with a rack structure that meshes with the side wall of the gear (205). The connecting rod (204) is symmetrically arranged on both sides of the gear (205).

5. The HJT cell reticle of claim 4, wherein: A worm gear (206) is rotatably mounted on the side wall of the frame (101), and a worm wheel (207) that works with the worm gear (206) is fixedly connected to the end of the gear (205). The side wall of the worm gear (206) meshes with the side wall of the worm wheel (207).

6. The HJT cell reticle of claim 5, wherein: A knob (208) is rotatably mounted on the side wall of the frame (101). The knob (208) is fixedly connected to the end of the worm gear (206). The side wall of the frame (101) is provided with a clearance groove that cooperates with the knob (208). The end of the knob (208) does not extend beyond the side wall of the frame (101).

7. The HJT cell reticle of claim 6, wherein: The knob (208) has a handle bolt (209) threadedly connected to its side wall, and the end of the handle bolt (209) is engaged with the side wall of the frame (101).

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