Flower basket structure for photovoltaic cell acetic acid steam test

Abstract

The utility model discloses a flower basket structure for testing acetic acid steam of a photovoltaic cell, which comprises a plurality of supporting rods arranged in parallel, and a positioning rod and a bearing rod are sequentially arranged between the supporting rods from top to bottom; the positioning rod and the bearing rod are provided with clamping teeth which are symmetrically arranged, and the clamping teeth located on the positioning rod and the bearing rod form four-point positioning of the photovoltaic cell. The shielding area is reduced as much as possible, so that a test sample is in full contact with test solution steam, and the influence of device shielding on test data is reduced; on the other hand, the simple flower basket can be easily put into and taken out of the test box, so that the addition of the test solution and the cleaning and maintenance of the test device are easier and simpler.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic cell durability testing, in particular to a flower basket structure for acetic acid vapor testing of photovoltaic cells. Background Technique

[0002] At present, the encapsulation glue film of photovoltaic modules usually adopts EVA glue film (ethylene-vinyl acetate copolymer). During long-term use, with the erosion of water vapor, the EVA glue film will hydrolyze to form acetic acid, which will corrode the electrodes and solder tapes on the surface of the battery, thus affecting the electrical performance and safety performance of the photovoltaic module. However, in the current damp heat test of photovoltaic modules, it takes thousands of hours to confirm this corrosion phenomenon. Therefore, a test method for shortening the test cycle is proposed, that is, directly exposing the photovoltaic cell to acetic acid vapor under high temperature and low humidity conditions to detect the durability of the cell in acetic acid vapor. Basically, the acetic acid vapor durability (corrosion resistance) test devices in the industry are all integrated devices including an environmental chamber, an acid tank, a carrier box and a ventilation system. On the one hand, there is a problem of blocking the samples, and on the other hand, since they are installed on the device, there are problems such as complex operation during the process of cleaning the box body and replacing the test solution.

[0003] For example, a "corrosion resistance test tooling for photovoltaic cells and its test method" disclosed in a Chinese patent document, with the publication number: CN113418858A, discloses a box body with an open upper end and a box cover. A stand is arranged at the bottom of the box body, and a cell carrier is arranged on the stand; the cell carrier includes a cell mounting plate group and a bracket for fixing the cell mounting plate group. The cell mounting plate group includes a first cell mounting plate at the bottom and a second cell mounting plate at the top. A first opening is formed on the upward side of the first cell mounting plate, and a second opening is formed on the side of the second cell mounting plate facing the inside of the bracket, enclosing a space for placing the cell. However, this solution also has the problem of blocking the test samples and is inconvenient for maintaining the equipment. Summary of the Invention

[0004] In order to solve the problem that the test device blocks the test samples in the prior art, the utility model provides a flower basket structure for acetic acid vapor testing of photovoltaic cells. The contact positions are four points, which minimizes the blocking area as much as possible, enables the test samples to contact the test solution vapor more fully, and is convenient for maintenance.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A flower basket structure for acetic acid vapor durability test of photovoltaic cells, comprising: a plurality of support rods arranged in parallel, and a positioning rod and a bearing rod are sequentially arranged from top to bottom between the support rods; the positioning rod and the bearing rod are provided with symmetrically arranged teeth, and the teeth on the positioning rod and the bearing rod form four-point positioning of the photovoltaic cells. The shielding area is reduced as much as possible, so that the test sample can be more fully contacted with the test solution vapor, and the influence of the device shielding on the test data is reduced; on the other hand, the simple flower basket can be easily put into and taken out of the test box, and the addition of the test solution and the cleaning and maintenance of the test device are more easy and simple.

[0007] Preferably, a handle is provided between the support rods, and the horizontal height distance between the handle and the photovoltaic cell is 10-30 mm, and the handle is located at the top of the support rod. The handle facilitates operations such as lifting the entire structure. And the specific height setting avoids blocking the photovoltaic cells.

[0008] Preferably, a limiting protrusion is provided at the bottom of the bearing rod, and the limiting protrusion is connected to the bottom of the tooth, and the limiting protrusion and the tooth form a groove for accommodating the photovoltaic cell. The photovoltaic cell is fixed by the limiting protrusion, and two-point positioning and fixing of the photovoltaic cell are realized in cooperation with the tooth, which is convenient for disassembly and does not block the photovoltaic cell.

[0009] Preferably, the positioning rod and the handle are respectively located on different adjacent side surfaces of the support rod, and the positioning rod includes two symmetrically arranged ones. The loading and unloading direction of the photovoltaic cell and the operation direction of the handle are staggered, so as to avoid touching the photovoltaic cell during the handle operation and avoid blocking the photovoltaic cell by the handle.

[0010] Preferably, the two positioning rods are located at the same height of the support rod, the teeth face the inner direction of the positioning rod, and the teeth are arranged at equal intervals. Limiting is realized from the symmetric two sides of the photovoltaic cell, so as to avoid friction or uneven force during the loading and unloading of the photovoltaic cell, and improve the convenience of loading and unloading the photovoltaic cell.

[0011] Preferably, a cavity for accommodating the photovoltaic cell is formed between adjacent teeth, and the side surface of the tooth abuts against the side surface of the photovoltaic cell; the side surface of the tooth slides with the side surface of the photovoltaic cell. The photovoltaic cell is limited by the cavity between adjacent teeth, which is convenient for taking out or fixing the photovoltaic cell before and after the experiment.

[0012] Preferably, the bearing rod is parallel to the positioning rod, the bearing rod is perpendicularly and fixedly connected to the support rod, and the bearing rod and the handle are respectively located on adjacent side surfaces of the support rod. In this way, each photovoltaic cell is positioned at the same height and distance by the positioning rod and the bearing rod, ensuring that each photovoltaic cell contacts uniform steam during the experiment.

[0013] Preferably, the spacing between the teeth of the card is in the range of 3-5 mm, and there are no teeth at the edges of the positioning rod and the bearing rod within 15-25 mm. This leaves enough space for the handle to operate, and at the same time, the sufficient spacing between the teeth can also ensure the versatility of this solution for photovoltaic cells of different sizes and specifications.

[0014] The utility model has the following advantages:

[0015] (1) By four-point positioning, the shielding area is reduced as much as possible, enabling the test sample to contact the test solution steam more fully and reducing the influence of the device shielding on the test data. On the other hand, this simple type of flower basket can be easily placed into and taken out of the test chamber, making it easier and more concise to add the test solution and clean and maintain the test device; (2) Enough space is left for the handle to operate, and at the same time, the sufficient spacing between the teeth can also ensure the versatility of this solution for photovoltaic cells of different sizes and specifications; (3) Enough space is left for the handle to operate, and at the same time, the sufficient spacing between the teeth can also ensure the versatility of this solution for photovoltaic cells of different sizes and specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings in the following description are only exemplary. For those of ordinary skill in the art, other implementation drawings can be obtained by extension based on the provided drawings without creative efforts.

[0017] Figure 1 is the front view structural schematic diagram in the embodiment.

[0018] Figure 2 is the top view structural schematic diagram in the embodiment.

[0019] Figure 3 is the side view structural schematic diagram in the embodiment.

[0020] In the figure:

[0021] 1 - handle; 2 - support rod; 3 - teeth of the card; 4 - positioning rod; 5 - bearing rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0023] Such as Figures 1 - 3As shown, in a preferred embodiment, the utility model discloses a flower basket structure for acetic acid vapor durability test of photovoltaic cells, comprising the following structure: a plurality of support rods 2 arranged in parallel, wherein the plurality of support rods 2 arranged in parallel include at least three or more, and the plurality of support rods 2 are arranged in parallel to support the entire structure, and when multiple groups of structures are stacked, the photovoltaic cells will not be blocked. Positioning rods 4 and bearing rods 5 are arranged in sequence from top to bottom between the support rods 2; positioning and abutting are performed at different positions of the photovoltaic cells by the positioning rods 4 and the bearing rods 5, respectively, to maintain the stability of the photovoltaic cells, and to reduce the area of ​​the photovoltaic cells blocked on the side as much as possible, so that the contact area between the photovoltaic cells and the test solution vapor is larger, and the test effect is guaranteed. The positioning rods 4 and the bearing rods 5 are provided with symmetrically arranged latches 3, and the latches 3 located on the positioning rods 4 and the bearing rods 5 are of the same size, and are arranged one by one, so as to realize multi-point positioning of the photovoltaic cells, and will not cause damage to the outer side of the photovoltaic cells. The latch teeth 3 on the positioning rod 4 and the bearing rod 5 form a four-point positioning for the photovoltaic cell. The shielding area is reduced as much as possible, so that the test sample and the test solution vapor are more fully in contact, and the impact of the device shielding on the test data is reduced; on the other hand, the simple flower basket can be easily put in and taken out of the test box, which makes the addition of the test solution and the cleaning and maintenance of the test device easier and simpler.

[0024] When this solution is in use, four-point positioning of the photovoltaic cell is achieved by providing symmetrically arranged latches on the positioning rod and the bearing rod, and cooperating with the edge or specific position of the photovoltaic cell. This positioning method is more accurate and stable than single-point or multi-point asymmetric positioning, and can effectively prevent the photovoltaic cell from shifting or rotating. Several parallel support rods serve as the foundation of the entire structure and provide strong supporting force. The positioning rod and the bearing rod are fixed vertically or obliquely between the support rods to form a stable frame. The addition of latches further enhances the stability of the structure, making it less likely for the photovoltaic cell to shake or fall off when subjected to external forces. The latch design in this solution can be adjusted or customized according to the size and shape of the photovoltaic cell to accommodate photovoltaic cells of different specifications and types.

[0025] In other embodiments, in this solution, a handle 1 is provided between the support rods 2, the handle 1 is fixedly connected to the support rods 2, the two ends of the handle 1 are respectively connected to the two support rods 2, the handle 1 is convenient for lifting the support rods 2, and the support rods 2 connected to the same handle 1 are not provided with a positioning rod 4 and a bearing rod 5. Thus, the handle 1 and the positioning rod 4 are staggered, so that the handle 1 and the positioning rod 4 form a right angle with the support rod 2 as the center. The horizontal height distance between the handle 1 and the positioning rod 4 is 10-30mm, and further preferably, the horizontal height distance between the handle 1 and the positioning rod 4 is 20mm, so that the bottom end face of the handle 1 can have a safe distance from the top end face of the photovoltaic cell, on the one hand, it will not cause obstruction to the photovoltaic cell, and on the other hand, it is convenient to move when moving in the device. The handle 1 is located at the top of the support rod 2. The handle 1 is convenient for lifting the entire structure. And the specific height setting avoids obstruction to the photovoltaic cell.

[0026] In other embodiments, the bottom of the bearing rod 5 described in this scheme is provided with a limiting protrusion, and the limiting protrusion is used to fix the photovoltaic cell, determine the fixed position of the photovoltaic cell, and realize the height positioning of the photovoltaic cell, so that the photovoltaic cell does not need to be fixed from the side, and only needs to be blocked from the bottom of the photovoltaic cell to achieve fixation, which minimizes the blocking of the photovoltaic cell, so that more area can be in contact with the test solution vapor and participate in the reaction. The limiting protrusion is connected to the bottom of the latch 3, the limiting protrusion is located in the radial direction of the bearing rod 5, the limiting protrusion is fixedly connected to the bearing rod 5, and the limiting protrusion extends from the outer edge of the bearing rod 5 to the center of the structure along the radial direction. When the photovoltaic cell is loaded, the limiting protrusion abuts against the bottom surface of the photovoltaic cell, and the connection between the limiting protrusion and the support rod 2 abuts against the corner of the bottom edge of the photovoltaic cell, and the limiting protrusion and the support rod 2 abut against the two sides of the bottom edge corner of the photovoltaic cell respectively. The limiting protrusion and the latch 3 form a groove for accommodating the photovoltaic cell, so that the photovoltaic cell is supported from the bottom surface of the photovoltaic cell. The limiting protrusion is used to fix the photovoltaic cell, and the two-point positioning and fixing of the photovoltaic cell are achieved in cooperation with the latch 3, which is convenient for disassembly and will not cause obstruction to the photovoltaic cell.

[0027] In other embodiments, the positioning rod 4 and the handle 1 of the present solution are respectively located on different adjacent side surfaces of the support rod 2. The positioning rod 4 and the handle 1 form a right angle in the horizontal plane. During use, the positioning rod 4 is perpendicular to the photovoltaic cell, and the handle 1 is parallel to the photovoltaic cell. The positioning rod 4 limits the photovoltaic cell from the two side end faces of the photovoltaic cell. When the handle 1 is lifted, the lifting direction of the handle 1 is parallel to the fixing direction of the photovoltaic cell, and it will not block the side of the photovoltaic cell. The positioning rod 4 includes two symmetrically arranged ones. The two symmetrically arranged positioning rods 4 are located on the same horizontal plane, so that the photovoltaic cell can be horizontally arranged. The loading and unloading direction of the photovoltaic cell and the operation direction of the handle 1 are staggered, avoiding touching the photovoltaic cell when the handle 1 is operated and preventing the handle 1 from blocking the photovoltaic cell.

[0028] In other embodiments, the two positioning rods 4 in the present solution are located at the same height of the support rod 2. During use, when loading and unloading the photovoltaic cell, the two sides of the photovoltaic cell at the same height are positioned simultaneously, avoiding the inconvenience during the loading and unloading process of the photovoltaic cell caused by different heights on both sides. The teeth 3 face the inner direction of the positioning rod 4, and the positioning of the photovoltaic cell is achieved through the teeth 3. Every two adjacent teeth 3 form a set of positioning structures. Every two adjacent teeth 3 respectively position from the two side end faces of the same photovoltaic cell, and the two side faces of each tooth 3 respectively position different photovoltaic cells. The teeth 3 are arranged at equal intervals, capable of positioning and fixing multiple photovoltaic cells of the same size simultaneously, and ensuring that each photovoltaic cell is evenly in contact with the test solution vapor. Limiting is achieved from the symmetric two sides of the photovoltaic cell, avoiding friction or uneven force during the loading and unloading of the photovoltaic cell, and improving the convenience of loading and unloading the photovoltaic cell.

[0029] In other embodiments, a cavity for accommodating a photovoltaic cell is formed between adjacent teeth 3. The photovoltaic cell is abutted and fixed through the cavity, which ingeniously avoids the need for additional fasteners in traditional fixing methods, simplifies the installation process, reduces material consumption, and also lowers costs. The side surface of the tooth 3 abuts against the side surface of the photovoltaic cell; the stress is effectively dispersed, reducing the possibility of stress concentration, thereby reducing the risk of damage to the photovoltaic cell due to uneven stress. The side surface of the tooth 3 slides with the side surface of the photovoltaic cell. The sliding contact between the tooth 3 and the side surface of the photovoltaic cell allows for dimensional deviations and minor deformations within a certain range, increasing the fault tolerance and flexibility of the design. This is particularly advantageous for dealing with photovoltaic cells of different batches or with minor size differences. The photovoltaic cell is limited in position through the cavity between adjacent teeth 3, facilitating the removal or fixing of the photovoltaic cell before and after the experiment. Photovoltaic cells of different sizes and shapes can be adapted by adjusting the spacing and shape of the teeth 3, facilitating modular improvement.

[0030] In other embodiments, the carrier rod 5 is parallel to the positioning rod 4, effectively utilizing the space and making the entire device more compact in size, facilitating portability and storage. At the same time, this layout also avoids the problems of structural congestion and imbalance that may be caused by arranging too many components on a single side. The carrier rod 5 is perpendicularly and fixedly connected to the support rod 2. This perpendicular layout provides good stability for the entire structure. Perpendicular connections can generally more effectively resist lateral forces and torques, making the entire device more stable when carrying heavy objects or being subjected to external forces, and less likely to deform or be damaged. The carrier rod 5 and the handle 1 are located on adjacent side surfaces of the support rod 2. This layout enables the operator to more conveniently control the handle 1 during operation while maintaining stable control of the items on the carrier rod 5. Each photovoltaic cell is limited in height and distance by the positioning rod 4 and the carrier rod 5, ensuring that each photovoltaic cell contacts uniform steam during the experiment.

[0031] In other embodiments, by adjusting the lengths and dimensions of the carrier rod 5, the positioning rod 4, and the support rod 2, this solution can flexibly adapt to items of different sizes and weights. This adaptability enables the device to be applied in a variety of scenarios, improving its versatility and practicality.

[0032] In other embodiments, the spacing range of the teeth 3 is 2 - 10 mm, and more preferably 3 - 5 mm. There are no teeth 3 at the edges 15 - 25 mm of the positioning rod 4 and the carrier rod 5, and more preferably there are no teeth 3 at a position 20 mm away from the handle 1. Enough space is left for the operation of the handle 1, and at the same time, a sufficient tooth 3 spacing can also ensure the versatility of this solution for photovoltaic cells of different size specifications.

[0033] In another embodiment, to achieve the above object, the present utility model provides the following solution: The simple flower basket is composed of a cross bar and a handle. It is characterized in that the material of the flower basket is acid-resistant plastic, which can be formed by one-time extrusion molding or by bonding components; the cross bar consists of four vertical support rods 2, two positioning rods 4 with transverse teeth 3, and two load-bearing rods 5 with transverse teeth; among them, the positioning rods 4 and the load-bearing rods 5 are aligned in pairs, and the cross-section of the cross bar can be circular, square, oval, etc.; the teeth of the positioning rod 4 are columns with a rectangular cross-section; the spacing between the teeth is maintained at 3 mm to 5 mm, and they are aligned vertically, horizontally, and left and right, and there are no teeth at a position 20 mm from the handle; the teeth of the load-bearing rod 5 have an additional load-bearing surface below compared to the teeth of the positioning rod 4; the handle 1 is higher than the test sample, at least 20 mm or more; this flower basket is applicable to all existing battery cell sizes, including but not limited to: 182 series and its derivatives, 210 series. The overall structure is simple, which can meet the requirement of fixedly supporting the test sample while minimizing the contact with the test sample as much as possible.

[0034] The contact position between the simple flower basket and the test sample is four points, which minimizes the shielding area as much as possible, enables the test sample to be more fully in contact with the test solution vapor, and reduces the influence of the device shielding on the test data; on the other hand, this simple flower basket can be easily placed into and taken out of the test chamber, making it easier and more concise for adding the test solution and cleaning and maintaining the test device.

[0035] Based on the present utility model, these modifications or improvements made without departing from the spirit of the present utility model all fall within the scope of protection required by the present utility model.

Claims

1. A basket structure for testing photovoltaic cells with acetic acid vapor, characterized in that: include: A plurality of support rods are arranged in parallel, and positioning rods and bearing rods are arranged in sequence from the top to the bottom between the support rods; the positioning rods and the bearing rods are provided with symmetrically arranged latches; the latches on the positioning rods and the bearing rods form four-point positioning for the photovoltaic cell sheet.

2. A basket structure for testing photovoltaic cells with acetic acid vapor according to claim 1, characterized in that: A handle is provided between the support rods. The horizontal height distance between the handle and the photovoltaic cell sheet is 10-30 mm. The handle is located at the top of the support rod.

3. A basket structure for testing photovoltaic cells with acetic acid vapor according to claim 1 or 2, characterized in that: A limiting protrusion is provided at the bottom of the bearing rod, and the limiting protrusion is connected to the bottom of the latch tooth. The limiting protrusion and the latch tooth form a groove for accommodating the photovoltaic cell sheet.

4. A basket structure for testing photovoltaic cells with acetic acid vapor according to claim 1 or 2, characterized in that: The positioning rod and the handle are respectively located on two different adjacent side surfaces of the support rod, and the positioning rod includes two symmetrically arranged ones.

5. The basket structure for photovoltaic cell acetic acid steam testing according to claim 4, characterized in that: The two positioning rods are located at the same height of the support rod, the latch teeth face the inner side of the positioning rods, and the latch teeth are arranged at equal intervals.

6. The basket structure for testing photovoltaic cells with acetic acid vapor according to claim 3, characterized in that: A cavity for accommodating the photovoltaic cell sheet is formed between adjacent latch teeth, and the side surfaces of the latch teeth abut against the side surfaces of the photovoltaic cell sheet; the side surfaces of the latch teeth slide between the side surfaces of the photovoltaic cell sheet.

7. The basket structure for photovoltaic cell acetic acid vapor testing according to claim 1, characterized in that: The bearing rod is parallel to the positioning rod, the bearing rod is vertically fixedly connected to the support rod, and the bearing rod and the handle are respectively located on two adjacent side surfaces of the support rod.

8. A basket structure for testing photovoltaic cells with acetic acid vapor according to claim 1, 2 or 7, characterized in that: The spacing between the latch teeth is in the range of 3-5 mm, and there are no latch teeth at 15-25 mm from the edge of the positioning rod and the bearing rod.

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