Placing device and coating equipment
By using a placement device that alternately stacks barrier sheets and solar cells during the solar cell coating process, the problems of cell sticking and scratching during the coating process are solved, achieving efficient and low-cost solar cell coating treatment and improving the stability and production efficiency of solar cells.
Patent Information
- Application Number
- CN202422572634.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-10-24
AI Technical Summary
During the coating process of solar cells, contact between adjacent solar cells leads to adhesion and scratching, increasing the breakage rate and production costs. Furthermore, the existing dispensing process is prone to melting at high temperatures, affecting production efficiency.
A placement device that alternately stacks barrier sheets and battery cells is used. The barrier sheets are made of high-temperature resistant material and are placed between adjacent battery cells to ensure that the battery cells are isolated from each other during the coating process. A low-adhesion coating prevents adhesion, and the device is combined with the clamping equipment of the coating equipment to achieve efficient handling.
It significantly reduces cell adhesion and scratching during coating, lowers the breakage rate and production costs, improves coating efficiency and cell stability, and avoids unnecessary film formation and subsequent polishing processes.
Smart Images
Figure CN223513923U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of photovoltaic technology, and further to a placement device and coating equipment. Background Technology
[0002] With the continuous growth of global demand for renewable energy, solar energy, as a clean and renewable energy source, is becoming increasingly important. In the solar photovoltaic industry, solar cells, as the core component, directly determine the power generation capacity and economic benefits of the entire photovoltaic system through their production efficiency and performance. Therefore, improving the production efficiency and quality of solar cells and reducing production costs have become critical issues that the photovoltaic industry urgently needs to address.
[0003] Most existing solar cells require a slicing process. After slicing, the cut surfaces of the solar cells often need to be repaired, that is, a dense, passivating film is formed on the cut surfaces of the solar cells to improve the conversion efficiency and stability of the cells.
[0004] Currently, the common practice for coating repair on the cut surfaces of solar cells is to simply stack the cells in a cell cassette and then apply a thin film to the exposed cut surfaces using methods such as atomic layer deposition (ALD) or physical vapor deposition (PVD). However, the back of the solar cell contains components such as grid lines, silver paste, and electrodes. When stacking several cells, the electrodes on the back of one cell can easily scratch the front of the next cell, causing damage to the front of the cell. Therefore, adjacent cells need to be separated during coating. Currently, this is typically done by applying adhesive between adjacent cells to create a gap. However, because the coating process generally requires high temperatures, the adhesive on the cell surface and foam debris introduced during production can easily melt, causing cell adhesion, increasing the breakage rate, reducing production efficiency, and increasing costs. Furthermore, the adhesive application leaves a gap between adjacent cells, allowing passivation gas to easily enter the gaps, resulting in unnecessary film formation on both the front and back of the cells, requiring subsequent polishing processes. Utility Model Content
[0005] To address the aforementioned technical problems, the purpose of this utility model is to provide a placement device in which barrier sheets and battery cells are stacked within the placement cavity of the box. The barrier sheets are positioned between adjacent battery cells, thus isolating them from each other and preventing direct contact. This significantly reduces the sticking and scratching of battery cells during coating on the cut surface, thereby lowering the breakage rate and production costs.
[0006] To achieve the above objectives, this utility model provides a placement device and a coating equipment. The placement device is suitable for placing battery cells in a high-temperature coating process. The placement device includes a barrier sheet and a box.
[0007] The barrier sheet is adapted to be stacked sequentially and at intervals with the battery cells, so that adjacent battery cells are isolated from each other;
[0008] The box has a placement cavity with an opening on one side. The placement cavity is suitable for stacking the barrier sheet and the battery sheet, and the opening is suitable for exposing the cut surface of the battery sheet.
[0009] In some embodiments, the barrier sheet is made of a high-temperature resistant material, and the heat resistance temperature of the barrier sheet is 100°-500°.
[0010] In some embodiments, the heat resistance temperature of the barrier sheet is 100°-300°.
[0011] In some embodiments, the barrier sheet is any one of graphite, ceramic, metal, carbon fiber, carbon-carbon composite material, and polymer composite material.
[0012] In some embodiments, the cross-section of the barrier sheet matches the cross-section of the battery cell, such that the barrier sheet completely separates the front and back sides of adjacent battery cells.
[0013] And / or, the barrier sheet is in the form of a thin sheet, and the thickness of the barrier sheet is 0.05mm-0.5mm.
[0014] In some embodiments, the thickness of the barrier sheet is 0.05mm-0.5mm.
[0015] In some embodiments, the thickness of the barrier sheet is 0.05mm-0.2mm.
[0016] In some embodiments, the cross-sections of the barrier sheet, the battery cell, and the housing are matched, such that the end faces of the battery cell and the barrier sheet after stacking are adapted to abut against the inner wall of the housing.
[0017] And / or, the surface of the barrier sheet is further provided with a low-adhesion coating.
[0018] In some embodiments, a pad is also included, on which the battery cells and the barrier sheets are adapted to be stacked, and a clamping device is adapted to clamp the pad and place the battery cells and the barrier sheets stacked on the pad into the placement cavity of the housing.
[0019] In some embodiments, the battery cells housed in the placement device are any one of TOPCon batteries, HJT batteries, XBC batteries, PERC batteries, perovskite tandem batteries, and novel compound batteries;
[0020] And / or, the placement device is suitable for placement in any one or more coating processes, such as physical vapor deposition, chemical vapor deposition, and atomic layer deposition.
[0021] According to another aspect of this application, a coating apparatus is further provided, including a reaction chamber, a placement device according to any of the above preferred embodiments, a clamping device, and a battery cell. The reaction chamber is provided with a tray, and the clamping device is adapted to place the housing of the placement device on the tray and to place the stacked battery cell and barrier sheet in the housing.
[0022] Compared with the prior art, the placement device and coating equipment provided by this utility model have at least one of the following beneficial effects:
[0023] 1. The placement cavity of the box is suitable for stacking barrier sheets and battery cells. The barrier sheets are placed between adjacent battery cells, so that adjacent battery cells are isolated from each other and have no direct contact. This significantly reduces the sticking and scratching of battery cells when coating the cut surface, and reduces the breakage rate and production cost.
[0024] 2. The cross-section of the barrier sheet matches the cross-section of the battery cell, so that the front and back sides of adjacent battery cells are completely separated, preventing contact between adjacent battery cells; moreover, the barrier sheet completely fills the space between adjacent battery cells, preventing the formation of a coating on the front or back of the battery cell.
[0025] 3. The cross-sections of the barrier sheet, the battery cell, and the box body are matched to ensure that the stacked barrier sheet and battery cell fit into the placement cavity of the box body, thus preventing the barrier sheet and battery cell from shaking.
[0026] 4. The surface of the barrier sheet is also coated with a low-adhesion coating, which makes the surface of the barrier sheet extremely low in adhesion, preventing the barrier sheet from sticking to the battery cell and making it easy to reuse the barrier sheet.
[0027] 5. The battery cells and barrier sheets are suitable for being stacked on the pad, which makes it easy for the clamping equipment to transport the stacked barrier sheets and battery cells into the placement cavity of the box in one go through the pad. This improves the handling efficiency of the stacked battery cells and barrier sheets and avoids the clamping equipment directly clamping the barrier sheets and battery cells, which may cause damage to the barrier sheets or battery cells. Attached Figure Description
[0028] The preferred embodiments will be described below in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages and implementation methods of this utility model.
[0029] Figure 1 This is a diagram showing the positions of the battery cells and the barrier sheets;
[0030] Figure 2 This is a structural diagram of the barrier sheet;
[0031] Figure 3 This is a structural diagram of the box;
[0032] Figure 4 This is a structural diagram of the clamping plate.
[0033] Explanation of icon numbers:
[0034] 1. Barrier sheet, 2. Battery cell, 3. Box body, 31. Opening, 4. Pad. Detailed Implementation
[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.
[0036] To keep the drawings concise, each figure only schematically shows the parts relevant to the utility model, and these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."
[0037] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.
[0038] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0039] Furthermore, in the description of this application, the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of this utility model. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.
[0040] refer to Figures 1 to 3 This utility model provides a placement device suitable for placing battery cells 2 in a high-temperature coating process. The placement device includes a barrier sheet 1 and a box 3. The barrier sheet 1 is suitable for stacking with the battery cells 2 in sequence at intervals, so that adjacent battery cells 2 are isolated from each other. The box 3 has a placement cavity, and an opening 31 is provided on one side of the placement cavity. The placement cavity is suitable for stacking and placing the barrier sheet 1 and the battery cells 2, and the opening 31 is suitable for exposing the cut surface of the battery cells 2.
[0041] In this embodiment, the placement cavity of the box 3 is suitable for stacking the barrier sheet 1 and the battery cell 2. The barrier sheet 1 is disposed between adjacent battery cells 2, so that the adjacent battery cells 2 are isolated from each other and have no direct contact, which significantly reduces the sticking and scratching of the battery cells 2 when coating the cut surface, and reduces the breakage rate and production cost.
[0042] Specifically, the barrier sheet 1 and the battery cell 2 are stacked alternately to prevent direct contact between adjacent battery cells 2. The stacked battery cells 2 and barrier sheet 1 are then placed together into the housing 3 for annealing or coating. The cut surfaces of each battery cell 2 face the same direction and are all suitable for exposure through the opening 31 to prevent the battery cells 2 from sticking together or scratching each other during processing, storage, or transportation. It is worth noting that the barrier sheet 1 and battery cell 2 can be stacked on the outer pad 4 and then placed together into the placement cavity; alternatively, the barrier sheet 1 and battery cell 2 can be directly stacked within the placement cavity of the housing 3. The barrier sheet 1 is made of a high-temperature resistant material with a heat resistance temperature of 100°C-500°C. Preferably, the heat resistance temperature of the barrier sheet 1 is 100°C-300°C. In practical use, the barrier sheet 1 can be any one of graphite, ceramic, metal, carbon fiber, carbon-carbon composite material, or polymer composite material. The selection of these materials aims to ensure that the barrier sheet 1 maintains its physicochemical properties and excellent thermal conductivity even when heated to high temperatures (e.g., hundreds of degrees Celsius), guaranteeing stability and reliability during high-temperature heating processes. During heating, the barrier sheet 1 effectively isolates the battery cells 2, preventing adhesion caused by high temperatures, while allowing heat to be evenly transferred to each battery cell 2. Preferably, the barrier sheet 1 is graphite.
[0043] It is worth noting that the barrier sheet 1 is placed between the sliced solar cells 2 after the cut surfaces are exposed, forming a stacked arrangement of barrier sheet 1 and solar cells 2. After stacking, the solar cells 2 and barrier sheet 1 are placed in a dedicated housing 3, with the cut surfaces of the solar cells 2 exposed from the opening 31 of the housing 3 to facilitate further coating processing. The placement device is suitable for use in any one or more coating processes such as physical vapor deposition, chemical vapor deposition, and atomic layer deposition. Therefore, depending on the materials and conditions of the passivation coating of the solar cells 2 in this application, the coating methods include, but are not limited to, CVD, ALD, magnetron sputtering, and vapor deposition. The placement device of this application is also suitable for post-cutting processing, storage, transportation, and any stage before subsequent packaging of solar cells 2 where it is necessary to prevent the solar cells 2 from sticking together, especially performing well in processes involving high-temperature heat treatment (such as coating passivation and annealing). The solar cells 2 housed by the placement device are any one of TOPCon cells, HJT cells, XBC cells, PERC cells, perovskite tandem cells, and novel compound cells. In this application, the battery cell 2 is a conventional battery cell 2 in the art, and this application will not further limit or elaborate on it.
[0044] Furthermore, the cross-section of the barrier sheet 1 matches the cross-section of the battery cell 2, so that the barrier sheet 1 completely separates the front and back sides of the adjacent battery cells 2.
[0045] In this embodiment, the cross-section of the barrier sheet 1 matches the cross-section of the battery cell 2, so that the front and back sides of adjacent battery cells 2 are completely separated, avoiding contact between adjacent battery cells 2; moreover, the barrier sheet 1 completely fills the space between adjacent battery cells 2, preventing the formation of a coating on the front or back side of the battery cell 2.
[0046] Specifically, the barrier sheet 1 is used to prevent the battery cells 2 from sticking together during processing or storage. The size of the barrier sheet 1 matches the size of the battery cells 2 to ensure that each battery cell 2 can be independently and tightly separated. Simultaneously, the size and shape of the barrier sheet 1 can be customized or modified according to the specifications of the battery cells 2 to adapt to battery cells 2 of different sizes, shapes, or types, ensuring that the barrier sheet 1 perfectly fits the battery cells 2. This allows for customization according to different specifications of battery cells 2, improving the versatility and applicability of the application. The size and shape of the barrier sheet 1 are consistent with the battery cells 2, ensuring that the gaps between adjacent battery cells 2 are completely filled by the barrier sheet 1, preventing deposited air from entering the gaps between adjacent battery cells 2, preventing the formation of a coating on the front or back of the battery cells 2, reducing the need for subsequent removal of excess coating, reducing operational steps, and increasing production efficiency. Preferably, the battery cells 2 are sheet-like, the barrier sheet 1 is sheet-like, and the surface of the barrier sheet 1 matches the front and back of the battery cells 2.
[0047] More specifically, the dimensions of the battery cell 2 to be coated are 182*92mm, and the dimensions of the barrier sheet 1 are also 182*92mm. The barrier sheet 1 is made of graphite and has a thickness of 0.2mm. The battery cell 2 and the barrier sheet 1 are placed alternately in the housing 3 using a clamping device. Next, the housing 3 is placed in the reaction chamber of the ALD device, and a uniform and dense tin oxide film is formed on the exposed cut surface of the battery cell 2 at a coating temperature of 150℃. After coating, the housing 3 is removed from the ALD device using the clamping device, and the battery cell 2 and the barrier sheet 1 are separated. Using the method of this embodiment, a high-quality aluminum oxide film can be formed on the surface of the battery cell 2, thereby improving the performance and stability of the battery cell 2.
[0048] In a modified embodiment, the size of the battery cell 2 to be coated is 210*105mm, and the size of the barrier sheet 1 is also 210*105mm. The barrier sheet 1 is made of aluminum and has a thickness of 0.1mm. The battery cell 2 and the barrier sheet 1 are spaced apart and placed in the housing 3 using a clamping device. The separated battery cell 2 is then placed in the vacuum chamber of the PVD equipment, and a thin film of aluminum oxide is uniformly coated on the cut surface of the battery cell 2 at a coating temperature of 240℃. After coating is completed, the housing 3 is removed, and the battery cell 2 and the barrier sheet 1 are separated.
[0049] It is worth noting that the thickness of the barrier sheet 1 in this application is 0.05mm-2mm to ensure that the barrier sheet 1 can provide sufficient separation effect without excessively affecting the loading of the battery cell 2, thus ensuring production efficiency. Preferably, the thickness of the barrier sheet 1 is 0.05mm-0.5mm.
[0050] Furthermore, the cross-sections of the barrier sheet 1, the battery cell 2, and the box body 3 are matched, so that the end faces of the stacked battery cell 2 and barrier sheet 1 are suitable for abutting against the inner sidewall of the box body 3.
[0051] In this embodiment, the cross-sections of the barrier sheet 1, the battery cell 2, and the housing 3 are matched, so that the stacked barrier sheet 1 and battery cell 2 fit the placement cavity of the housing 3, preventing the barrier sheet 1 and battery cell 2 from shaking. Specifically, the cross-section of the housing 3 is its longitudinal cross-section, that is, the cross-section in the width direction, which matches the cross-sections of the battery cell 2 and the barrier sheet 1, so that the shapes of the battery cell 2 and the barrier sheet 1 can be matched and placed in the placement cavity of the housing 3, improving the fit between the battery cell 2, the barrier sheet 1, and the housing 3, and preventing the inner walls of the battery cell 2, the barrier sheet 1, and the housing 3 from colliding with each other when the housing 3 rotates during the coating process, preventing the battery cell 2 from being damaged due to impact with the housing 3, and ensuring the safety of the coating of the battery cell 2.
[0052] Furthermore, the surface of the barrier sheet 1 is also provided with a low-adhesion coating. In this embodiment, the surface of the barrier sheet 1 is also provided with a low-adhesion coating, which makes the surface of the barrier sheet 1 have extremely low adhesion, preventing the barrier sheet 1 from sticking to the battery cell 2 and facilitating the reuse of the barrier sheet 1.
[0053] Specifically, the surface of the barrier sheet 1 may undergo special treatment, such as plasma treatment, chemical etching, or coating with a low-adhesion coating, to further enhance its anti-adhesion performance. Furthermore, the low-adhesion coating on the surface of the barrier sheet 1 facilitates the cleaning of impurities, allowing the barrier sheet 1 to be reused. It is worth noting that the formation process of the low-adhesion coating is not further limited or described in this application, as long as the surface has a low-adhesion coating.
[0054] Further, refer to Figure 3 and Figure 4 It also includes a pad 4, battery cells 2 and barrier sheets 1 adapted to be stacked on the pad 4, and a clamping device adapted to clamp the pad 4 and place the 2 battery cells and barrier sheets 1 stacked on the pad 4 into the placement cavity of the box 3.
[0055] In this embodiment, the battery cell 2 and the barrier sheet 1 are suitable for being stacked on the pad 4, so that the clamping device can transport the stacked barrier sheet 1 and battery cell 2 into the placement cavity of the box 3 in one go through the pad 4, thereby improving the handling efficiency of the stacked battery cell 2 and barrier sheet 1 and avoiding the clamping device from directly clamping the barrier sheet 1 and battery cell 2, which could cause damage to the barrier sheet 1 or battery cell 2.
[0056] Specifically, the pad 4 serves to simultaneously transport all stacked battery cells 2 and barrier sheets 1 using a clamping device. The pad 4 is larger than the battery cells 2 and barrier sheets 1. A sliding groove is provided inside the housing 3, allowing the pad 4 to move along the groove and enter the placement cavity. A clamping groove is provided on the side of the pad 4 away from the battery cells 2, and the robotic arm of the clamping device is adapted to insert into the clamping groove and transport the pad 4. A removable cover is provided on one side of the housing 3, located on the opening side. Before coating, the opening of the box 3 needs to be turned to one side, and the cover at the top of the box 3 needs to be removed. Then, the barrier sheet 1 and the battery cell 2 are alternately stacked on the pad 4, so that there is no direct contact between adjacent battery cells 2. Then, the pad 4 is clamped by the clamping device, and the stacked battery cells 2, barrier sheet 1 and pad 4 are put into the placement cavity of the box 3. Then, the cover is put on, and the battery cells 2, barrier sheet 1 and pad 4 are clamped by the clamping tool, so that the battery cells 2 and barrier sheet 1 are installed inside the box. Finally, the box 3 is clamped and rotated by the clamping device so that the opening of the box 3 faces upward. Then, the battery cells 2 are annealed or coated. After the process is completed, the pad 4 is clamped by the clamping device, and the coated battery cells 2 and barrier sheet 1 are removed at the same time. Finally, the stacked battery cells 2 and barrier sheet 1 are separated.
[0057] Furthermore, this application provides a coating apparatus, including a reaction chamber, a placement device as described in any of the above embodiments, a clamping device, and a battery cell 2. The reaction chamber is provided with a tray, and the clamping device is adapted to place the housing 3 of the placement device on the tray and to place the stacked battery cell 2 and the barrier sheet 1 inside the housing 3.
[0058] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of this utility model. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.
Claims
1. A placement device, characterized in that, The placement device is suitable for placing battery cells in a high-temperature coating process, and the placement device includes a barrier sheet and a housing; The barrier sheet is adapted to be stacked sequentially and at intervals with the battery cells, so that adjacent battery cells are isolated from each other; The box has a placement cavity with an opening on one side. The placement cavity is suitable for stacking the barrier sheet and the battery sheet, and the opening is suitable for exposing the cut surface of the battery sheet. The barrier sheet is made of a high-temperature resistant material, and its heat resistance temperature is 100°-500°.
2. The placement device according to claim 1, characterized in that, The heat resistance temperature of the barrier sheet is 100°-300°.
3. The placement device according to claim 1, characterized in that, The barrier sheet can be any one of graphite, ceramic, metal, carbon fiber, carbon-carbon composite material, or polymer composite material.
4. The placement device according to claim 1, characterized in that, The cross-section of the barrier sheet matches the cross-section of the battery cell, so that the barrier sheet completely separates the front and back sides of adjacent battery cells. And / or, the barrier sheet is in the form of a thin sheet, and the thickness of the barrier sheet is 0.05mm-2mm.
5. The placement device according to claim 1, characterized in that, The thickness of the barrier sheet is 0.05mm-0.5mm.
6. The placement device according to claim 1, characterized in that, The cross-sections of the barrier sheet, the battery cell, and the housing are matched so that the end faces of the battery cell and the barrier sheet after stacking are adapted to abut against the inner wall of the housing. And / or, the surface of the barrier sheet is further provided with a low-adhesion coating.
7. The placement device according to claim 1, characterized in that, It also includes a pad, on which the battery cells and the barrier sheet are adapted to be stacked, and a clamping device is adapted to clamp the pad and place the battery cells and the barrier sheet stacked on the pad into the placement cavity of the housing.
8. The placement device according to claim 1, characterized in that, The battery cells housed in the placement device are any one of TOPCon batteries, HJT batteries, XBC batteries, PERC batteries, perovskite tandem batteries, and novel compound batteries. And / or, the placement device is suitable for placement in any one or more coating processes such as physical vapor deposition, chemical vapor deposition, and atomic layer deposition.
9. A coating apparatus, characterized in that, The device includes a reaction chamber, a placement device as described in any one of claims 1-8, a clamping device, and a battery cell. The reaction chamber is provided with a tray, and the clamping device is adapted to place the housing of the placement device on the tray and to place the stacked battery cell and barrier sheet into the housing.