Battery inner cavity uniform air inlet system and back contact battery

Abstract

The utility model relates to a battery inner cavity uniform air inlet system and a back contact battery. The uniform air inlet system for the battery inner cavity comprises a shell, a process chamber is arranged in the shell, and a mounting cavity is formed above the process chamber. An air inlet system is arranged in the mounting cavity, and a flow uniformizing plate is arranged between the mounting cavity and the process chamber; a vent hole is formed in the flow uniformizing plate, the mounting cavity communicates with the process cavity through the vent hole, and an air outlet hole is formed in the air inlet system and faces the vent hole. The uniform gas inlet system provides a uniform gas inlet environment for the process chamber in the battery, so that the reaction gas is uniformly distributed in the whole process chamber, the produced films are consistent in thickness, and the quality of the film layers is improved.

Description

Technical Field

[0001] This application relates to the field of battery design technology, and in particular to a uniform air intake system for the inner cavity of a battery and a back contact battery. Background Technology

[0002] With the development of solar cell technology, back-contact cells have emerged. Due to the basic structural framework of this technology, the absence of grid lines on the front side allows for a larger light-absorbing area and better light conversion. Inorganic films need to be produced within the cell to enhance insulation performance and improve passivation. However, the PN structure of the back contact increases the complexity of the manufacturing process. The structural characteristics of the back contact increase the difficulty of producing inorganic films within the cell's manufacturing chamber. Utility Model Content

[0003] Therefore, it is necessary to provide a uniform air intake system for the battery cavity and a back contact battery to address the production problems in the battery process chamber.

[0004] A uniform air intake system for the battery cavity, comprising:

[0005] The housing has a process chamber inside, and an installation cavity is provided above the process chamber;

[0006] An air intake system is installed inside the installation cavity, and a flow equalizer is installed between the installation cavity and the process chamber. The flow equalizer has ventilation holes that connect the installation cavity and the process chamber, and an air outlet is provided on the air intake system facing the ventilation holes.

[0007] In one embodiment, the air intake system includes an air intake pipe arranged parallel above the flow equalizer, and air outlets are evenly arranged on the surface of the air intake pipe facing the flow equalizer.

[0008] In one embodiment, the intake pipe includes an inlet end and an outlet end, and a delivery pipe is configured between the inlet end and the outlet end. The delivery pipe includes several straight segments and several curved segments, and the straight segments and curved segments are connected end to end to form a continuous meandering configuration of the delivery pipe.

[0009] In one embodiment, the flow equalizer has several vent holes evenly distributed on it, and the opening size of any vent hole is the same.

[0010] In one embodiment, the intake pipe is configured as a high-temperature resistant metal pipe.

[0011] In one embodiment, the flow equalizer is configured as a high-temperature resistant plate.

[0012] In one embodiment, both the air intake system and the flow regulator are detachably disposed inside the housing.

[0013] In one embodiment, the shape of the vent is set to one of the following: circular, rectangular, polygonal, or irregular shape;

[0014] The shape of the air vent can be set to one of the following: round, rectangular, polygonal, or irregular.

[0015] A back-contact battery includes a uniform air intake system for the battery cavity as described above, wherein the process chamber is configured as an atomic layer deposition chamber, the air intake system is configured as a high-temperature resistant metal tube, and the flow equalization plate is configured as a high-temperature resistant plate.

[0016] In one embodiment, an alumina film is provided on the back of the housing, the alumina film being prepared by an atomic layer deposition chamber.

[0017] The aforementioned uniform air intake system for the battery cavity includes: a housing with a process chamber inside, and an installation cavity above the process chamber. An air intake system is installed within the installation cavity, and a flow equalization plate is positioned between the installation cavity and the process chamber. The flow equalization plate has vent holes that connect the installation cavity and the process chamber, and an outlet hole is located on the air intake system facing the vent holes. The uniform air intake system provides a uniform air intake environment for the process chamber within the battery, ensuring that the reactant gases are evenly distributed throughout the process chamber, resulting in consistent film thickness and improved film quality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the uniform air intake system for the battery cavity provided in an embodiment of this application.

[0019] Figure 2 This is a schematic diagram of the battery cavity uniform air intake system provided in the embodiments of this application after the air intake system has been removed.

[0020] Figure 3 This is a schematic diagram of the intake pipe provided in an embodiment of this application.

[0021] Figure 4 This is a partial structural diagram of the intake pipe provided in an embodiment of this application.

[0022] Figure 5 This is a schematic diagram of the flow uniform plate provided in an embodiment of this application.

[0023] Icon labels:

[0024] 1. Shell; 1.1. Process chamber; 1.2. Mounting chamber;

[0025] 2. Intake system; 2.1. Exhaust port; 2.2. Inlet end; 2.3. Outlet end; 2.4. Straight section; 2.5. Curved section;

[0026] 3. Fluid equalizer; 3.1. Vent holes. Detailed Implementation

[0027] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0028] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0029] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0031] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0033] See Figures 1-5 As shown, Figure 1 This is a schematic diagram of the battery cavity uniform air intake system provided in the embodiments of this application. Figure 2 This is a schematic diagram of the battery cavity uniform air intake system provided in the embodiments of this application after removing the air intake system. Figure 3 This is a schematic diagram of the intake pipe structure provided in the embodiments of this application. Figure 4 This is a partial structural diagram of the intake pipe provided in the embodiments of this application. Figure 5 This is a schematic diagram of the structure of the flow equalizer provided in the embodiment of this application, showing a uniform air intake system for the battery cavity, including: a housing 1, and a process chamber 1.1 disposed inside the housing 1, wherein the process chamber 1.1 is used to generate an inorganic film, such as an AlxOy film (alumina film), inside the battery housing.

[0034] An installation cavity 1.2 is provided above the aforementioned process chamber 1.1. An air intake system 2 is provided in the aforementioned installation cavity 1.2. A flow equalizer 3 is provided between the aforementioned installation cavity 1.2 and the aforementioned process chamber 1.1. The flow equalizer 3 separates the two installation cavities 1.2 from the aforementioned process chamber 1.1.

[0035] A vent 3.1 is provided on the aforementioned flow equalization plate 3, which connects the aforementioned mounting cavity 1.2 to the aforementioned process chamber 1.1. An outlet 2.1 is provided on the aforementioned air intake system 2 facing the vent 3.1. The air intake system 2 inputs gas into the mounting cavity 1.2 in a directional and quantitative manner through the outlet 2.1. Since the mounting cavity 1.2 and the process chamber 1.1 are connected through the vent 3.1, the gas input by the air intake system 2 can be controlled to uniformly enter the process chamber 1.1 from above by controlling the position and number of vents 3.1 on the flow equalization plate 3. This application can provide a uniform air intake environment for the process chamber 1.1 within the battery, which is beneficial for the production process in the process chamber 1.1. The gas input by the air intake system 2 will affect the production quality within the process chamber 1.1. For example, in a process chamber 1.1 producing AlxOy membranes, the gas input by the air intake system 2 is the reaction gas required for the process. By uniformly distributing vents 3.1 on the flow equalizer 3, the reactive gas input from the gas inlet system 2 can be uniformly introduced into the process chamber 1.1. This uniform gas entry ensures a consistent distribution of the reactive gas throughout the entire process chamber 1.1. This results in a more uniform deposition rate of the AlxOy film formed on the battery surface. It avoids situations where the gas concentration is too high or too low in certain areas, ensuring that the film layer has a consistent deposition rate at different locations. Simultaneously, it improves the quality of the produced film layer and reduces the occurrence of defects such as pinholes and cracks.

[0036] Furthermore, uniform gas intake ensures thorough mixing and diffusion of the reactant gases, leading to a more complete reaction. This contributes to improved AlxOy membrane density, reducing porosity and impurities in the membrane layer and increasing its purity. A dense membrane layer better protects the battery from external factors such as moisture and oxygen, improving its reliability and safety. Simultaneously, a high-purity membrane layer exhibits better insulation properties and chemical stability, which is beneficial for the long-term stable operation of the battery.

[0037] In one embodiment, the air intake system 2 includes an air intake pipe arranged parallel to the flow equalizer 3 above it, and air outlets 2.1 are evenly distributed on the surface of the air intake pipe facing the flow equalizer 3. This ensures that the gas is discharged uniformly during the exhaust phase, and that the distance from each air outlet 2.1 to the flow equalizer 3 is consistent, avoiding situations where the local concentration is too high or too low in the mounting cavity 1.2 and process chamber 1.1 due to limitations in the air intake method. This airflow path helps ensure that each area receives a uniform gas supply, providing favorable conditions for the uniform growth of the AlxOy film.

[0038] In one embodiment, the air intake pipe includes an inlet end 2.2 and an outlet end 2.3. A conveying pipe is configured between the inlet end 2.2 and the outlet end 2.3. The conveying pipe includes several straight segments 2.4 and several arc segments 2.5. The straight segments 2.4 and the arc segments 2.5 are connected end to end to form a continuous meandering configuration of the air intake pipe.

[0039] The continuous, meandering configuration of the intake duct lengthens the gas flow path during transport. As the gas flows through the straight section 2.4 and the curved section 2.5, its velocity gradually stabilizes due to the change in path. This design reduces abrupt velocity changes between the inlet end 2.2 and the outlet end 2.3, allowing the gas to enter the intake duct and the flow equalizer 3 at a more stable speed. The meandering configuration also buffers pressure changes, resulting in a smoother airflow.

[0040] Furthermore, the gas continuously changes its flow direction as it flows through the meandering delivery pipe. This flow pattern helps promote the mixing of different gas components, ensuring that the reactant gases are thoroughly and uniformly mixed before entering process chamber 1.1. For the process of generating AlxOy membranes, uniformly mixed reactant gases can improve the quality and uniformity of the membrane. The meandering delivery pipe enhances the gas mixing effect and reduces this non-uniformity.

[0041] In one embodiment, the flow equalizer 3 has a plurality of ventilation holes 3.1 evenly distributed on it, and the opening size of any of the ventilation holes 3.1 is the same. When the opening size of the ventilation holes 3.1 is the same, the resistance to the gas from each ventilation hole 3.1 is basically the same during the gas flow through the flow equalizer 3. This allows the gas to pass through each ventilation hole 3.1 at a relatively uniform speed, thereby achieving a uniform distribution within the process chamber 1.1 below the flow equalizer 3.

[0042] This setup allows for more stable parameters such as gas flow rate and pressure within process chamber 1.1. Because the gas distribution is more uniform, the reaction conditions in each region are relatively consistent, thus reducing fluctuations in process parameters. This helps improve process stability and reduces film quality issues caused by variations in process parameters.

[0043] In one embodiment, the intake pipe is constructed from a high-temperature resistant metal tube, ensuring its structural stability at high temperatures and preventing deformation, softening, or damage. This ensures the intake pipe can operate continuously and reliably, providing a guarantee for the uniform delivery and distribution of gas.

[0044] In one embodiment, the flow equalization plate 3 is configured as a high-temperature resistant plate, capable of adapting to high-temperature environments. This ensures the stability of its structure at high temperatures, enhances structural strength, and guarantees reusability.

[0045] In one embodiment, both the air intake system 2 and the flow equalizer 3 are detachably disposed inside the housing 1. This arrangement facilitates regular maintenance and upkeep. Furthermore, the detachable air intake system 2 and flow equalizer 3 can be flexibly adjusted and optimized according to different production process requirements. Air intake systems 2 and flow equalizers 3 of different specifications, materials, or designs can be replaced to meet different gas flow rate, pressure, and distribution requirements.

[0046] In one embodiment, the shape of the vent 3.1 is designed to be one of a circle, rectangle, polygon, or irregular shape; the shape of the outlet 2.1 is also designed to be one of a circle, rectangle, polygon, or irregular shape. Different orifice shapes can have different effects on gas flow. For example, circular orifices usually have more uniform airflow, suitable for processes requiring stable airflow. Rectangular orifices can provide a larger gas flow in a specific direction, suitable for situations where there are special requirements for airflow in a certain direction. Polygonal and irregular shaped orifices can be customized according to specific process requirements to achieve specific gas flow distributions. For example, in some battery manufacturing processes, it is necessary to increase gas flow in specific areas to promote the reaction; in this case, rectangular or irregular shaped orifices can be selected to achieve localized airflow enhancement.

[0047] A back-contact battery includes a uniform air intake system for the battery cavity as described above, wherein the process chamber 1.1 is configured as an atomic layer deposition chamber, the air intake system 2 is configured as a high-temperature resistant metal tube, and the flow equalization plate 3 is configured as a high-temperature resistant plate.

[0048] For back-contact batteries, uniform gas intake in the battery process chamber 1.1 ensures the formation of a uniform AlxOy film in key areas of the battery. A uniform film provides consistent insulation and passivation, reducing leakage and carrier recombination, thereby increasing the battery's open-circuit voltage and short-circuit current, and ultimately improving conversion efficiency. Back-contact batteries have complex internal structures, such as interdigitated electrodes and a back-side field. Uniform gas intake in the gas intake system 2 provides a stable environment for internal chemical reactions, promoting uniformity in crystal growth and impurity diffusion. This helps optimize the battery's internal structure, improve crystal quality and purity, and reduce the presence of defects and impurities, further enhancing battery performance and stability.

[0049] The uniform gas intake system 2 provides stable gas flow and pressure, making the production process of back-contact batteries more repeatable. Repeatable processes ensure consistent performance and quality for each battery, improving production efficiency and product yield. The uniform gas intake system can achieve uniform gas distribution within the complex structure of the back-contact battery, tailored to its specific structural design. This is crucial for ensuring adequate treatment and protection for all parts of the battery.

[0050] In one embodiment, an aluminum oxide film is provided on the back side of the housing 1, and the aluminum oxide film is formed by the atomic layer deposition chamber.

[0051] In one embodiment of this application, the diameter of the vent 3.1 is between 30 and 100 mm, and the number of vent 3.1 is between 1,000 and 10,000; the diameter of the air outlet 2.1 is between 0.5 and 3 mm, the spacing between the air outlets 2.1 is between 0.5 and 3 cm, and the number of air outlets 2.1 is between 10 and 100.

[0052] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery cavity uniform air intake system, characterized in that, include: The housing (1) has a process chamber (1.1) inside, and an installation cavity (1.2) is provided above the process chamber (1.1). An air intake system (2) is provided in the mounting cavity (1.2), and a flow equalization plate (3) is provided between the mounting cavity (1.2) and the process chamber (1.1); a vent hole (3.1) is provided on the flow equalization plate (3), and the vent hole (3.1) connects the mounting cavity (1.2) and the process chamber (1.1), and an air outlet hole (2.1) is provided on the air intake system (2) facing the vent hole (3.1).

2. The battery cavity uniform air intake system according to claim 1, characterized in that, The air intake system (2) includes an air intake pipe, which is arranged parallel above the flow equalizer (3), and the air outlet (2.1) is evenly arranged on the surface of the air intake pipe facing the flow equalizer (3).

3. The battery cavity uniform air intake system according to claim 2, characterized in that, The air intake pipeline includes an inlet end (2.2) and an outlet end (2.3). A conveying pipeline is set between the inlet end (2.2) and the outlet end (2.3). The conveying pipeline includes several straight segments (2.4) and several arc segments (2.5). The straight segments (2.4) and the arc segments (2.5) are connected end to end to form a continuous meandering configuration of the conveying pipeline.

4. The battery cavity uniform air intake system according to claim 1, characterized in that, The flow equalizer (3) has several ventilation holes (3.1) evenly distributed on it, and the opening size of any ventilation hole (3.1) is the same.

5. The battery cavity uniform air intake system according to claim 2, characterized in that, The air intake pipe is made of high-temperature resistant metal pipe.

6. The battery cavity uniform air intake system according to claim 1, characterized in that, The flow equalization plate (3) is configured as a high-temperature resistant plate.

7. The battery cavity uniform air intake system according to claim 1, characterized in that, Both the air intake system (2) and the flow equalizer (3) are detachably installed inside the housing (1).

8. The battery cavity uniform air intake system according to claim 1, characterized in that, The shape of the vent (3.1) is set to one of the following: circular, rectangular, polygonal, or irregular shape; The shape of the air outlet (2.1) is set to one of the following: circular, rectangular, polygonal or irregular shape.

9. A back-contact battery, characterized in that, The battery cavity uniform air intake system includes any one of the claims 1-8 above, wherein the process chamber (1.1) is configured as an atomic layer deposition chamber, the air intake system (2) is configured as a high temperature resistant metal tube, and the flow equalization plate (3) is configured as a high temperature resistant plate.

10. The back contact battery according to claim 9, characterized in that, An alumina film is provided on the back of the housing (1), and the alumina film is formed by the atomic layer deposition chamber.

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