A mixed transmission type back contact cell sintering light injection integrated furnace

Abstract

This utility model relates to the field of battery production equipment technology, specifically to a hybrid conveyor-type back-contact battery sintering and photoinjection integrated furnace, including a frame with a sintering section and a photoinjection section. A chain conveyor belt is installed in the sintering section, and a conveyor roller conveyor is installed in the photoinjection section. A transfer device is provided between the chain conveyor belt and the conveyor roller conveyor. Chain conveying is used only in the sintering section, while roller conveyor conveying is used in the photoinjection section. This combination of methods effectively reduces the length of the chain conveyor, thus avoiding the instability and scratching of the battery cells associated with chain conveying. Furthermore, the end of the chain conveyor only needs to be initially cooled to above 200°C before entering the photoinjection area cavity, avoiding the process of cooling followed by heating. This reduces the steps of cooling and heating the battery cells and furnace belt, thus reducing energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of battery production equipment technology, specifically to a hybrid transmission type back contact battery sintering photoinjection furnace. Background Technology

[0002] The chain-type transport device used in the sintering process of solar cells still has shortcomings:

[0003] First, energy consumption is high. During the sintering and heating process of solar cells, the chain conveyor belt needs to be heated simultaneously to the process temperature, resulting in high energy consumption. During the cooling stage, the chain conveyor belt has a heat storage function; the temperature of the chain conveyor belt needs to be lowered at the same time as the temperature of the solar cells, leading to a high load on the cooling zone. This invention uses a chain conveyor belt only in the sintering section, and the end of the chain conveyor belt only needs to be initially cooled to above 200°C before entering the light injection region cavity. This avoids the process of cooling and then heating, reducing the steps of cooling and heating the solar cells and the furnace belt, thus reducing electrical energy consumption.

[0004] Secondly, the conveying stability is poor. Because the chain conveyor pins of the sintering furnace are always in contact with the solar cells, vibrations at this contact point can easily cause scratches, chipping, and other quality issues on the solar cells. Furthermore, overcoming wear and vibration during high-speed chain movement is a current challenge in achieving the highest possible sintering rate. This problem is particularly severe if the sintering and photopolymerization integrated machine uses a single furnace belt; an excessively long furnace belt exacerbates the vibration issue. Utility Model Content

[0005] To address the aforementioned issues, this utility model provides a hybrid conveyor-type back-contact battery sintering and photoinjection integrated furnace. Chain conveying is used only in the sintering section, while roller conveying is used in the photoinjection section. This combination effectively reduces the length of the chain conveyor, thus avoiding the instability and scratching of the battery cells associated with chain conveying. Furthermore, the chain conveyor only needs to be initially cooled to above 200°C before entering the photoinjection cavity, avoiding the process of cooling followed by heating. This reduces the steps of cooling and heating the battery cells and furnace belt, thereby reducing energy consumption.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a hybrid transmission type back contact battery sintering and photoinjection integrated furnace, comprising a frame, a sintering section and a photoinjection section provided on the frame, a chain conveyor belt provided in the sintering section, a conveyor roller conveyor provided in the photoinjection section, and a transfer device provided between the chain conveyor belt and the conveyor roller conveyor.

[0007] As a further improvement to the above technical solution:

[0008] The transfer device includes a mounting frame, an upper part of which is provided with a transfer roller conveyor, a protective housing is provided above the transfer roller conveyor, and a guide plate is provided inside the protective housing.

[0009] The upper part of the guide plate is connected to the protective shell, and the lower part is provided with a connecting extension plate, which is provided with a clearance groove.

[0010] The connecting plate has a guide roller located above the clearance groove on its side wall. The guide rollers are multiple and evenly distributed along the length of the connecting plate.

[0011] The guide plates are two in number and are symmetrically distributed about the center line of the transfer roller conveyor. The distance between the two guide plates gradually decreases along the conveying direction.

[0012] The guide plate includes a guide portion and a limiting portion, and the guide portion is arc-shaped.

[0013] The sintering section includes a drying zone, a pre-sintering zone, a sintering zone, and a cooling zone arranged sequentially along the material conveying direction. The photo-irradiation section includes a heating preheating zone, a photo-irradiation heat preservation zone, and a cooling zone.

[0014] The chain conveyor belt is equipped with multiple ejector pins that are evenly distributed along the length of the chain conveyor belt.

[0015] The conveyor rollers include multiple rollers distributed along the length of the light injection section, and each roller has a limiting groove in the middle.

[0016] The beneficial effects of this utility model embodiment are as follows: The hybrid conveyor type back contact battery sintering and photoinjection integrated furnace includes a frame, on which a sintering section and a photoinjection section are arranged. A chain conveyor belt is arranged in the sintering section, and a conveyor roller is arranged in the photoinjection section. A transfer device is arranged between the chain conveyor belt and the conveyor roller. The chain conveyor is used only in the sintering section, and the roller conveyor is used in the photoinjection section. The combination of the two methods can effectively reduce the length of the chain conveyor, thereby avoiding the disadvantages of poor stability and scratching of the battery cells caused by the chain conveyor. Moreover, at the end of the chain conveyor, it only needs to be initially cooled to above 200°C before entering the photoinjection area cavity, avoiding the process of cooling and then heating. This reduces the steps of cooling and heating the battery cells and furnace belt in this process, and reduces the power consumption. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a top view of the transfer device in this utility model;

[0019] Figure 3This is a schematic diagram of the guide roller structure in this utility model;

[0020] Figure 4 This is a top view of the guide plate in this utility model.

[0021] In the diagram: 1. Frame; 2. Sintering section; 3. Light injection section; 4. Chain conveyor belt; 5. Conveyor roller conveyor; 6. Mounting frame; 7. Transfer roller conveyor; 8. Protective housing; 9. Guide plate; 10. Connecting extension plate; 11. Alternating groove; 12. Guide section; 13. Limiting section; 14. Ejector pin; 15. Roller shaft; 16. Limiting groove; 17. Guide roller; 21. Drying zone; 22. Pre-sintering zone; 23. Sintering zone; 24. Cooling zone; 31. Heating and preheating zone; 32. Light-insulating zone; 33. Cooling zone. Detailed Implementation

[0022] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0023] like Figure 1 As shown, the hybrid conveyor-type back-contact battery sintering and photoinjection integrated furnace of this embodiment includes a frame 1, on which a sintering section 2 and a photoinjection section 3 are provided. The sintering section 2 is provided with a chain conveyor belt 4, and the photoinjection section 3 is provided with a conveying roller conveyor 5. A transfer device is installed between the chain conveyor belt 4 and the conveying roller conveyor 5. The chain conveyor belt 4 is driven by a separate motor, while the conveying roller conveyor 5 and the transfer device share a single motor. By combining chain conveying and roller conveying, the conveying operation of BC battery cells is completed. Compared with the existing integrated furnaces that use a single chain conveyor, the total length of the chain conveyor belt 4 can be reduced, thereby improving the overall stability of material conveying and effectively avoiding scratches, chipping, and other phenomena on the battery cells. The transfer device can be used to transfer between the two conveying devices, making up for the height difference between them and ensuring the smooth conveying of the battery cells.

[0024] like Figure 2 As shown, the adapter includes a mounting frame 6, an adapter roller conveyor 7 on the upper part of the mounting frame 6, a protective housing 8 on the upper part of the adapter roller conveyor 7, a guide plate 9 inside the protective housing 8, the upper part of the guide plate 9 being connected to the protective housing 8, and a connecting extension plate 10 on the lower part, the lower end of the connecting extension plate 10 extending to the lower part of the adapter roller conveyor 7, which can prevent the guide plate 9 from failing to function when the thickness of the battery cell is small. The connecting extension plate 10 is provided with a clearance groove 11 for installing the transfer roller, which can seal the connection gap between the guide plate 9 and the transfer roller while not hindering the rotation of the transfer roller.

[0025] like Figures 3-4As shown, a guide roller 17 is provided on the side wall of the connecting extension plate 10 above the relief groove 11. The guide roller 17 is installed vertically and its surface is covered with buffer points to prevent the battery cell from colliding with the guide roller 17 and causing chipping. There are multiple guide rollers 17 and they are evenly distributed along the length of the connecting extension plate 10.

[0026] There are two guide plates 9, which are symmetrically distributed about the center line of the transfer roller 7. The distance between the two guide plates 9 gradually decreases along the conveying direction, and the minimum distance is greater than the width of the battery panel. This can guide the battery panel during the transfer process, ensuring that it is located in the middle of the conveying roller 7 and can fall into the limiting groove 16 after entering the light injection section.

[0027] The guide plate 9 includes a guide portion 12 and a limiting portion 13, and the guide portion 12 is arc-shaped.

[0028] The sintering section 2 includes a drying zone 21, a pre-sintering zone 22, a sintering zone 23, and a cooling zone 24 arranged sequentially along the material conveying direction. The light injection section 3 includes a heating and preheating zone 31, a light-inducing and heat preservation zone 32, and a cooling zone 33. The cooling zone is eliminated at the end of the sintering section 2. Compared with the existing segmented conveying, it is not necessary to reduce the temperature of the solar cells to 80 degrees after sintering. Instead, the temperature can be reduced to 200 degrees and then directly transferred to the light injection section 3. This reduces the energy consumption required for cooling and then heating, and has the advantage of energy saving and efficiency improvement.

[0029] The chain conveyor belt 4 is provided with ejector pins 14. There are multiple ejector pins 14 and they are evenly distributed along the length of the chain conveyor belt 4. Multiple ejector pins 14 form a row, and two rows of ejector pins that are symmetrically distributed form a group. There are multiple groups of ejector pins on the surface of the chain conveyor belt 4 to reduce the contact area between the battery cells and the chain conveyor belt 4.

[0030] The conveyor roller 5 includes multiple rollers 15 distributed along the length of the light injection section 3. Each roller 15 has a limiting groove 16 in the middle. The limiting groove 16 is designed to limit the position of the battery cells, prevent them from deviating on the conveyor roller 5, and ensure the stable operation of the conveying operation.

[0031] It should be noted that in the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to those processes, articles, or apparatus / devices.

[0034] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A hybrid conveyor-type back-contact battery sintering and photoinjection integrated furnace, comprising a frame (1), wherein a sintering section (2) and a photoinjection section (3) are disposed on the frame (1), characterized in that: A chain conveyor belt (4) is provided inside the sintering section (2), and a conveyor roller (5) is provided inside the light injection section (3). A transfer device is provided between the chain conveyor belt (4) and the conveyor roller (5).

2. The hybrid transmission type back contact battery sintering photopolymerization furnace according to claim 1, characterized in that: The transfer device includes a mounting frame (6), a transfer roller conveyor (7) is provided on the upper part of the mounting frame (6), a protective shell (8) is provided above the transfer roller conveyor (7), and a guide plate (9) is provided inside the protective shell (8).

3. The hybrid transmission type back contact battery sintering photopolymerization furnace according to claim 2, characterized in that: The upper part of the guide plate (9) is connected to the protective shell (8), and the lower part is provided with a connecting extension plate (10), and the connecting extension plate (10) is provided with a clearance groove (11).

4. The hybrid transmission type back contact battery sintering photopolymerization furnace according to claim 3, characterized in that: The connecting plate (10) has a guide roller (17) located above the clearance groove (11) on its side wall. The guide roller (17) is multiple and is evenly distributed along the length of the connecting plate (10).

5. The hybrid transmission type back contact battery sintering photopolymerization furnace according to claim 2, characterized in that: The number of guide plates (9) is two and they are symmetrically distributed with the center line of the transfer roller conveyor (7) as the axis. The distance between the two guide plates (9) gradually decreases along the conveying direction.

6. The hybrid transmission type back contact battery sintering photopolymerization furnace according to claim 5, characterized in that: The guide plate (9) includes a guide portion (12) and a limiting portion (13), wherein the guide portion (12) is arc-shaped.

7. The hybrid transmission type back contact battery sintering photopolymerization furnace according to any one of claims 1-6, characterized in that: The sintering section (2) includes a drying zone (21), a pre-sintering zone (22), a sintering zone (23), and a cooling zone (24) arranged sequentially along the material conveying direction. The light injection section (3) includes a heating preheating zone (31), a light irradiation heat preservation zone (32), and a cooling zone (33).

8. The hybrid transmission type back contact battery sintering photopolymerization furnace according to claim 7, characterized in that: The chain conveyor belt (4) is provided with a pin (14), and the number of pins (14) is multiple and they are evenly distributed along the length direction of the chain conveyor belt (4).

9. The hybrid transmission type back contact battery sintering photopolymerization furnace according to claim 7, characterized in that: The conveyor roller (5) includes multiple rollers (15) distributed along the length of the light injection section (3), and each roller (15) has a limiting groove (16) in the middle.

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