A multi-cell side-by-side box for acetic acid testing of photovoltaic cells

Abstract

The utility model discloses a kind of photovoltaic cell acetic acid test's multiple cell piece side-by-side placement box, including corrosion-resistant box body and the sealing cover of sealing sleeve in corrosion-resistant box body top end outside, the sealing cover top end center is provided with acetic acid steam exhaust pipe head, the corrosion-resistant box body bottom end is fixed with acetic acid uniform diffusion device inside, by setting novel acetic acid uniform diffusion device in corrosion-resistant box body bottom end, its rectangular hollow bottom plate connects left and right steam input pipe head, top end is fixed with multiple cell piece placement mechanism, rectangular hollow bottom plate is sent to hollow even distribution frame with multiple even distribution delivery pipe, reduce loss stagnation, guarantee steam sufficient stability, hollow even distribution frame around cell piece placement mechanism, its four perimeter inner wall upper and lower sides equidistant diffusion hole and cell piece placement mechanism stagger, make steam spread from different height angle, avoid local concentration uneven, ensure that every piece of cell corrosion environment is consistent, reduce test error, improve result reliability and comparability.

Description

Technical Field

[0001] This utility model belongs to the technical field of photovoltaic module testing, specifically relating to a multi-cell side-by-side placement box for acetic acid testing of photovoltaic cells. Background Technology

[0002] In the reliability testing of photovoltaic cells and modules, acetic acid testing is an important means of evaluating their corrosion resistance in humid and hot environments. It is particularly effective in accurately reflecting the corrosion rate of cells and metallization layers (busbars, solder ribbons) in acetic acid, providing crucial data for product quality improvement. However, traditional placement devices often use a single-end steam input method, resulting in chaotic steam diffusion paths within the chamber and the formation of concentration gradients. This leads to significant differences in acetic acid vapor concentration at different locations of the cells, with some areas showing concentration deviations exceeding 20%. This non-uniformity causes substantial deviations in the corrosion rate of the cells, making the test results unrepresentative and unable to accurately reflect the true corrosion resistance of the cells. Furthermore, the existing vapor transport and diffusion structure design of the multi-cell side-by-side placement box is unreasonable. In existing devices, vapor often directly impacts the surface of the cells or forms local eddies due to obstructed transport paths, which not only exacerbates the uneven concentration distribution but may also cause physical damage to the cells due to excessive local vapor pressure. Utility Model Content

[0003] The purpose of this invention is to provide a multi-cell side-by-side placement box for acetic acid testing of photovoltaic cells, in order to solve the problem in the existing devices mentioned in the background art, where steam often directly impacts the surface of the cells or forms local eddies due to obstructed transmission paths, which not only exacerbates the uneven concentration distribution, but may also cause physical damage to the cells due to excessive local steam pressure.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a multi-cell side-by-side placement box for photovoltaic cell acetic acid testing, comprising a corrosion-resistant box body and a sealing cover that is sealed and fitted onto the outside of the top of the corrosion-resistant box body. An acetic acid vapor discharge pipe is provided at the center of the top of the sealing cover. An acetic acid uniform diffusion device is fixed inside the bottom of the corrosion-resistant box body. Two rows of multiple cell placement mechanisms are provided on the acetic acid uniform diffusion device, and the two rows of cell placement mechanisms are symmetrically arranged front and back. An acetic acid vapor input pipe is provided at the center of both the left and right ends near the bottom of the corrosion-resistant box body.

[0005] Preferably, the acetic acid uniform diffusion device includes a rectangular hollow base plate, a hollow equal distribution frame, and equal distribution conveying pipes. The rectangular hollow base plate is fixed to the inner wall of the bottom end of the corrosion-resistant box. Multiple equal distribution conveying pipes are equidistantly arranged at the top of the rectangular hollow base plate near the edge, and the top of the multiple equal distribution conveying pipes are connected to the hollow equal distribution frame.

[0006] Preferably, the hollow dividing frame surrounds the outside of the multiple solar cell placement mechanisms, and the outer walls of the hollow dividing frame are close to the inner walls of the corrosion-resistant box. After the solar cell placement mechanism fixes the photovoltaic cells, the photovoltaic cells do not contact the inner walls of the hollow dividing frame.

[0007] Preferably, the hollow dividing frame is connected to the interior of the rectangular hollow base plate through multiple dividing delivery pipes, and the two acetic acid vapor input pipes are respectively connected to the center of the left and right ends of the rectangular hollow base plate, and both acetic acid vapor input pipes are connected to the interior of the rectangular hollow base plate.

[0008] Preferably, the acetic acid uniform diffusion device further includes multiple diffusion holes. Multiple diffusion holes are equally spaced on both the upper and lower sides of the center of the inner wall of the hollow dividing frame, and the multiple diffusion holes inside the inner walls at the front and rear ends of the hollow dividing frame are staggered with the two rows of multiple battery cell placement mechanisms.

[0009] Preferably, the corrosion-resistant box body is made of PEEK material, the sealing cover is made of transparent acrylic material, and the sealing cover is provided with a handle on both the left and right outer walls.

[0010] Preferably, a silicone sealing gasket is fixed to the inner wall of the top of the sealing cover. After the sealing cover is completely fitted onto the outside of the top of the corrosion-resistant box, the bottom end of the silicone sealing gasket is tightly attached to the outer wall of the top of the corrosion-resistant box to prevent acetic acid vapor leakage.

[0011] Preferably, the battery cell placement mechanism includes a corrosion-resistant fixing block, a V-shaped groove, a movable hole, an elastic limiting block, and a sealing baffle. The corrosion-resistant fixing block is fixed on the top outer wall of the rectangular hollow base plate. The corrosion-resistant fixing block is provided with a V-shaped groove inside, and the V-shaped groove has an upward V-shaped opening. Sealing baffles are fixed inside both the front and rear ends of the V-shaped groove.

[0012] Preferably, the V-shaped slot has multiple movable holes equidistantly arranged at both ends near the top opening. The multiple movable holes are equidistantly arranged in the front-back direction. Each of the multiple movable holes is inserted and fixed with an elastic limiting block. The elastic limiting block is made of ceramic material. After the photovoltaic cell is inserted into the V-shaped slot, the multiple elastic limiting blocks are respectively clamped at both ends of the photovoltaic cell to play a fixing role.

[0013] Compared with the prior art, this utility model provides a multi-cell side-by-side placement box for photovoltaic cell acetic acid testing, which has the following beneficial effects: This invention incorporates a novel acetic acid uniform diffusion device inside the bottom of a corrosion-resistant housing. The rectangular hollow base plate of this device is connected at both ends to acetic acid vapor inlet pipes at the left and right ends of the corrosion-resistant housing. Multiple solar cell placement mechanisms for fixing the photovoltaic cells are fixed to the top of the rectangular hollow base plate. This device enables efficient transport and uniform distribution of acetic acid vapor. The rectangular hollow base plate receives vapor through the acetic acid vapor inlet pipes at both ends, and then evenly distributes the vapor to the hollow distribution frame via multiple distribution pipes, forming a continuous path from input to distribution to transport. This reduces vapor loss and stagnation during transmission, ensuring a sufficient and stable vapor supply, laying the foundation for subsequent uniform diffusion. The hollow distribution frame surrounds the solar cells. On the outer side of the cell placement mechanism, multiple diffusion holes on the upper and lower sides of its inner walls are staggered with the cell placement mechanism, allowing steam to diffuse to the cells from different heights and angles. This avoids excessively high or low local steam concentrations. At the same time, the equidistant design of the diffusion holes further improves the uniformity of steam distribution, ensuring that each photovoltaic cell is in a consistent corrosive environment. This significantly reduces test errors caused by environmental differences and improves the reliability and comparability of test results. Furthermore, the hollow, evenly spaced frame does not contact the fixed photovoltaic cells, avoiding physical interference with the cells while ensuring that steam can contact the cell surface without obstruction. This design allows steam to fully act on the cells and metallization layer, accurately reflecting their corrosion rate in the acetic acid environment and ensuring the validity of the test. Attached Figure Description

[0014] Figure 1 This is a front-view three-dimensional structural diagram of a photovoltaic cell acetic acid testing box with multiple cells placed side by side in the open state, according to the present invention.

[0015] Figure 2 This is a three-dimensional structural diagram of the sealing cap and silicone sealing gasket of this utility model.

[0016] Figure 3 This is a three-dimensional structural diagram of the battery cell placement mechanism of this utility model.

[0017] Figure 4 This is a three-dimensional structural diagram of the acetic acid uniform diffusion device of this utility model.

[0018] In the diagram: 1. Corrosion-resistant housing; 2. Battery cell placement mechanism; 3. Sealing cover; 4. Acetic acid vapor discharge pipe; 5. Acetic acid uniform diffusion device; 6. Acetic acid vapor input pipe; 7. Silicone sealing gasket; 8. Lid opening handle; 9. Corrosion-resistant fixing block; 10. V-shaped groove; 11. Movable hole; 12. Elastic limit block; 13. Sealing baffle; 14. Rectangular hollow base plate; 15. Hollow uniform distribution frame; 16. Uniform distribution conveying pipe; 17. Diffusive hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] This utility model provides, for example Figure 1-4 The diagram shows a multi-cell placement box for acetic acid testing of photovoltaic cells, comprising a corrosion-resistant box body 1 and a sealing cover 3 that is sealed to the outside of the top of the corrosion-resistant box body 1. An acetic acid vapor discharge pipe 4 is located at the center of the top of the sealing cover 3, which can promptly discharge excess vapor from the box to prevent excessive pressure from affecting the stability of the testing environment. Simultaneously, it forms a circulation with the vapor input to ensure concentration balance. An acetic acid uniform diffusion device 5 is fixed inside the bottom of the corrosion-resistant box body 1. Two rows of multiple cell placement mechanisms 2 are arranged on the acetic acid uniform diffusion device 5, symmetrically positioned front and back. This symmetrical layout allows for more even distribution of vapor to the cells on both sides, reducing testing deviations caused by positional differences. Acetic acid vapor input pipes 6 are located at the center of both the left and right ends near the bottom of the corrosion-resistant box body 1. This dual-pipe input design allows vapor to enter simultaneously from both sides, initially improving the uniformity of vapor distribution and avoiding... To eliminate the concentration gradient caused by single-ended input, the corrosion-resistant box 1 is made of PEEK material. PEEK material has excellent resistance to acetic acid corrosion and high temperature resistance, which can maintain structural stability in the test environment for a long time and extend the service life of the device. The sealing cover 3 is made of transparent acrylic material. Its transparency allows for real-time observation of the status of the battery cells inside the box. The test process can be monitored without opening the cover, reducing vapor leakage and environmental fluctuations caused by opening the cover. Both ends of the sealing cover 3 are equipped with opening handles 8 for easy opening and closing. A silicone sealing gasket 7 is fixed to the inner wall of the top of the sealing cover 3. After the sealing cover 3 is completely fitted onto the outside of the top of the corrosion-resistant box 1, the bottom end of the silicone sealing gasket 7 is tightly attached to the outer wall of the top of the corrosion-resistant box 1. The elastic deformation of the silicone achieves a tight seal, effectively preventing acetic acid vapor leakage, ensuring stable vapor concentration inside the box, and avoiding safety hazards caused by the leakage of corrosive vapor.

[0021] like Figure 1 , Figure 2 and Figure 3As shown, the battery cell placement mechanism 2 includes a corrosion-resistant fixing block 9, a V-shaped groove 10, a movable hole 11, an elastic limiting block 12, and a sealing baffle 13. The corrosion-resistant fixing block 9 is fixed to the outer wall of the top of the rectangular hollow base plate 14. The corrosion-resistant fixing block 9 has a V-shaped groove 10 inside, with the V-shaped opening of the V-shaped groove 10 facing upwards. The V-shaped structure can automatically center the battery cell through the inclined surfaces on both sides, ensuring that battery cells of different thicknesses can be stably placed in the center position, improving the convenience and accuracy of fixing. Sealing baffles 13 are fixed inside both the front and rear ends of the V-shaped groove 10, which can restrict the front and rear movement of the battery cell and prevent it from slipping off the end. The V-shaped groove 10 is located near the top opening. Multiple movable holes 11 are equidistantly arranged inside both the left and right ends. These movable holes 11 are equidistantly arranged in the front-to-back direction. Each movable hole 11 is fitted with an elastic limiting block 12. The elastic limiting block 12 is made of ceramic material, which is insulating and highly corrosion-resistant, preventing electrochemical corrosion caused by contact with the metal layer of the solar cell. At the same time, its elasticity can adapt to solar cells of different thicknesses, providing appropriate clamping force. After the photovoltaic solar cell is inserted into the V-shaped slot 10, the multiple elastic limiting blocks 12 clamp the two ends of the photovoltaic solar cell to fix it. Multi-point clamping can disperse pressure, prevent deformation of the solar cell, and ensure that the surface of the solar cell is unobstructed, ensuring uniform contact of steam.

[0022] like Figure 1 and Figure 4 As shown, the acetic acid uniform diffusion device 5 includes a rectangular hollow base plate 14, a hollow equal distribution frame 15, and equal distribution conveying pipes 16. The rectangular hollow base plate 14 is fixed to the inner wall of the bottom end of the corrosion-resistant box 1. Multiple equal distribution conveying pipes 16 are equidistantly arranged at the top edge of the rectangular hollow base plate 14. The top ends of the multiple equal distribution conveying pipes 16 are connected to the hollow equal distribution frame 15. The equidistant equal distribution conveying pipes 16 can evenly distribute the steam in the rectangular hollow base plate 14 to the hollow equal distribution frame 15. The equal distribution structure realizes the initial equal distribution of steam, laying the foundation for subsequent diffusion. The hollow equal distribution frame 15 surrounds the outside of the multiple solar cell placement mechanisms 2, and the outer walls of the hollow equal distribution frame 15 are close to the inner walls of the corrosion-resistant box 1. After the solar cell placement mechanism 2 fixes the photovoltaic cells, the photovoltaic cells do not contact the inner walls of the hollow equal distribution frame 15 to avoid local shading or physical interference caused by contact, ensuring that the surface of the solar cell can fully contact the steam, and preventing the solar cell from being damaged by collision.

[0023] like Figure 1 and Figure 4As shown, the hollow equalization frame 15 is connected to the interior of the rectangular hollow base plate 14 through multiple equalization conveying pipes 16. Two acetic acid vapor input pipes 6 are respectively connected to the center of the left and right ends of the rectangular hollow base plate 14, and both acetic acid vapor input pipes 6 are connected to the interior of the rectangular hollow base plate 14, forming a complete vapor path from dual input to the hollow base plate, converging to the equalization conveying pipes 16, and then diffusing to the hollow equalization frame 15. This allows the vapor to be gradually evenly distributed during transmission, improving the uniformity of distribution. The acetic acid uniform diffusion device 5 also includes multiple diffusion holes 17. Multiple diffusion holes 17 are equidistantly arranged on the upper and lower sides of the center of the inner wall of the hollow equalization frame 15. The multiple diffusion holes 17 inside the inner walls of the front and rear ends of the hollow equalization frame 15 are staggered with the two rows of multiple battery cell placement mechanisms 2. The staggered layout allows the vapor to diffuse directionally to the battery cells from different angles, avoiding local impact caused by the diffusion holes 17 facing the battery cells directly. At the same time, the equidistant design further ensures that the vapor concentration at each position is consistent, making the corrosion conditions uniform.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-cell side-by-side placement box for photovoltaic cell acetic acid testing, comprising a corrosion-resistant box body (1) and a sealing cover (3) sealed and fitted onto the outside of the top of the corrosion-resistant box body (1), wherein an acetic acid vapor discharge pipe (4) is provided at the center of the top of the sealing cover (3), characterized in that: The corrosion-resistant box (1) has an acetic acid uniform diffusion device (5) fixed inside the bottom end. The acetic acid uniform diffusion device (5) is provided with two rows of multiple battery cell placement mechanisms (2), and the two rows of battery cell placement mechanisms (2) are symmetrically arranged front and back. The corrosion-resistant box (1) is provided with acetic acid vapor input pipe head (6) at the center of the left and right ends near the bottom. The acetic acid uniform diffusion device (5) includes a rectangular hollow base plate (14), a hollow equal distribution frame (15), and equal distribution conveying pipes (16). The rectangular hollow base plate (14) is fixed on the inner wall of the bottom end of the corrosion-resistant box (1). Multiple equal distribution conveying pipes (16) are equidistantly arranged at the top edge of the rectangular hollow base plate (14), and the top ends of the multiple equal distribution conveying pipes (16) are connected to the hollow equal distribution frame (15).

2. The multi-cell side-by-side placement box for photovoltaic cell acetic acid testing according to claim 1, characterized in that: The hollow evenly divided frame (15) surrounds the outside of the multiple battery cell placement mechanisms (2), and the outer walls of the hollow evenly divided frame (15) are close to the inner walls of the corrosion-resistant box (1). After the battery cell placement mechanism (2) fixes the photovoltaic cell, the photovoltaic cell does not contact the inner walls of the hollow evenly divided frame (15).

3. A multi-cell side-by-side placement box for photovoltaic cell acetic acid testing according to claim 2, characterized in that: The hollow equal-dividing frame (15) is connected to the interior of the rectangular hollow base plate (14) through multiple equal-dividing conveying pipes (16). The two acetic acid vapor input pipe heads (6) are respectively connected to the center of the left and right ends of the rectangular hollow base plate (14), and both acetic acid vapor input pipe heads (6) are connected to the interior of the rectangular hollow base plate (14).

4. A multi-cell side-by-side placement box for photovoltaic cell acetic acid testing according to claim 3, characterized in that: The acetic acid uniform diffusion device (5) also includes multiple diffusion holes (17). Multiple diffusion holes (17) are equally spaced on both the upper and lower sides of the center of the inner wall of the hollow dividing frame (15). The multiple diffusion holes (17) inside the inner wall of the front and rear ends of the hollow dividing frame (15) are interleaved with the two rows of multiple battery cell placement mechanisms (2).

5. A multi-cell side-by-side placement box for photovoltaic cell acetic acid testing according to claim 1, characterized in that: The corrosion-resistant box body (1) is made of PEEK material, the sealing cover (3) is made of transparent acrylic material, and the outer walls of the left and right ends of the sealing cover (3) are provided with opening handles (8).

6. A multi-cell side-by-side placement box for photovoltaic cell acetic acid testing according to claim 5, characterized in that: A silicone sealing gasket (7) is fixed to the inner wall of the top of the sealing cover (3). After the sealing cover (3) is completely fitted onto the outside of the top of the corrosion-resistant box (1), the bottom end of the silicone sealing gasket (7) is tightly attached to the outer wall of the top of the corrosion-resistant box (1) to prevent acetic acid vapor from leaking.

7. A multi-cell side-by-side placement box for photovoltaic cell acetic acid testing according to claim 2, characterized in that: The battery cell placement mechanism (2) includes a corrosion-resistant fixing block (9), a V-shaped groove (10), a movable hole (11), an elastic limiting block (12), and a sealing baffle (13). The corrosion-resistant fixing block (9) is fixed on the top outer wall of the rectangular hollow base plate (14). The corrosion-resistant fixing block (9) has a V-shaped groove (10) inside, and the V-shaped groove (10) has an upward V-shaped opening. Sealing baffles (13) are fixed inside both the front and rear ends of the V-shaped groove (10).

8. A multi-cell side-by-side placement box for photovoltaic cell acetic acid testing according to claim 7, characterized in that: The V-shaped slot (10) has multiple movable holes (11) equidistantly arranged at both ends near the top opening. The multiple movable holes (11) are arranged equidistantly in the front-back direction. Each of the multiple movable holes (11) is inserted and fixed with an elastic limiting block (12). The elastic limiting block (12) is made of ceramic material. After the photovoltaic cell is inserted into the V-shaped slot (10), the multiple elastic limiting blocks (12) are respectively clamped at both ends of the photovoltaic cell to play a fixing role.

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