A hot pressing device for battery cell slurry

Abstract

This utility model discloses a hot pressing device for solar cell slurry, comprising a feeding transmission unit, a hot pressing unit, and an output transmission unit arranged sequentially. The hot pressing unit includes an upper roller assembly and a lower roller assembly. The upper roller assembly has a first front roller hot pressing module and a first rear roller module, and a first transmission belt drivingly connected to the first front roller hot pressing module and the first rear roller module. The lower roller assembly has a second front roller hot pressing module and a second rear roller module, and a second transmission belt drivingly connected to the second front roller hot pressing module and the second rear roller module. This utility model ensures that the solar cell is fully contacted by the first front roller hot pressing module and the second front roller hot pressing module, thereby making the pressure on the solar cell more uniform during hot pressing, resulting in a better hot pressing effect. The temperature of the solar cell can gradually change during the transportation process, resulting in better structural stability of the formed grid lines.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic equipment, specifically a hot pressing device for battery cell slurry. Background Technology

[0002] After the copper paste is patterned and transferred to the solar cell, a hot-pressing process is required to form stable and highly conductive metal grid lines. During the metallization of the copper paste, heating causes the copper powder particles to sinter and fuse together. Since heterojunction or perovskite tandem solar cells have relatively low temperature tolerance, applying pressure to the grid lines under heating conditions can promote paste sintering. Simultaneously, the hot-pressing process removes air from the surface of the solar cell, forming a low-oxygen layer on the cell surface, which effectively inhibits the oxidation of copper powder in the grid lines.

[0003] In existing technology, a hot-pressing plate is used to hot-press solar cells containing slurry. During the hot-pressing process, the hot-pressing plate directly presses the slurry on the solar cell, and then the hot-pressed solar cell is conveyed backward. However, due to the thinness of the solar cell, the pressure uniformity of the hot-pressing plate on the solar cell is poor, and there is a problem that some areas cannot be fully pressed. In addition, the entire hot-pressing process is carried out at room temperature, and the temperature difference between the slurry on the solar cell during hot pressing and before and after hot pressing is large, resulting in poor structural stability of the formed grid lines. Utility Model Content

[0004] In order to overcome the defects in the prior art, this utility model provides a hot pressing device for battery cell slurry, which is used to solve one or more of the above-mentioned problems.

[0005] This application discloses a hot pressing device for solar cell slurry, comprising a feeding transmission unit, a hot pressing unit, and an output transmission unit arranged sequentially. The hot pressing unit includes an upper roller assembly and a lower roller assembly located between the feeding transmission unit and the output transmission unit. The upper roller assembly has a first front roller hot pressing module adjacent to the feeding transmission unit and a first rear roller module adjacent to the output transmission unit, and a first transmission belt drivingly connected to the first front roller hot pressing module and the first rear roller module. The lower roller assembly has a second front roller hot pressing module adjacent to the feeding transmission unit and a second rear roller module adjacent to the output transmission unit, and a second transmission belt drivingly connected to the second front roller hot pressing module and the second rear roller module. The first front roller hot pressing module and the second front roller hot pressing module are arranged adjacent to each other to hot press the solar cells flowing out from the feeding transmission unit. The first transmission belt and the second transmission belt are used to transport the hot-pressed solar cells to the output transmission unit via the first rear roller module and the second rear roller module.

[0006] Furthermore, both the first front roller hot pressing module and the second front roller hot pressing module include a hot pressing roller and a heating part located inside the hot pressing roller. The heating part is used to heat the hot pressing roller, and the heating part is also used to heat the first transmission belt or the second transmission belt located outside the hot pressing roller.

[0007] Furthermore, it also includes a heating module, which has a heating cavity located outside the first front roller hot pressing module and the second front roller hot pressing module. The heating cavity has a heating lamp adjacent to the first front roller hot pressing module and a nitrogen gas circulation device.

[0008] Furthermore, the heating module also includes a preheating cavity, which is located outside the wafer feeding transmission unit and extends along the transmission direction of the wafer feeding transmission unit.

[0009] Furthermore, the feeding transmission unit includes a feeding transmission streamline and a sensing component located at the front end of the feeding transmission streamline. The feeding transmission streamline includes a roller extending laterally perpendicular to the cell conveying direction and a plurality of cell support components located outside the roller along the extension direction of the roller. Each cell support component includes two spaced and oppositely arranged transmission rings. The transmission rings have an abutment ring surface for supporting the cell. The sensing component is used to sense the cell entering the front end of the feeding transmission streamline.

[0010] Furthermore, it also includes a belt cleaning unit, which includes a cleaning component, a washing component, and an air knife component on the movement paths of the first transmission belt and the second transmission belt; the cleaning component, the washing component, and the air knife component are sequentially arranged as the first transmission belt moves from the first rear roller module to the first front roller hot pressing module; the cleaning component, the washing component, and the air knife component are sequentially arranged as the second transmission belt moves from the second rear roller module to the second front roller hot pressing module.

[0011] Furthermore, the cleaning assembly includes a brush for contacting the first drive belt or the second drive belt and a dust collection box located below the brush, the dust collection box being detachably installed below the brush.

[0012] Furthermore, the cleaning assembly includes an ultrasonic cleaning tank and a limiting roller for pressing the first or second drive belt into the ultrasonic cleaning tank, the limiting roller being used to press a portion of the first or second drive belt into the ultrasonic cleaning tank.

[0013] Furthermore, the air knife assembly is located behind the ultrasonic cleaning tank, and the air outlet of the air knife assembly is directly facing the first transmission belt or the second transmission belt to air dry the first transmission belt or the second transmission belt after cleaning.

[0014] Furthermore, it also includes a cooling unit disposed adjacent to the film output transmission unit, the cooling unit comprising an air-cooling component disposed opposite to the film output transmission unit and a water-cooling component disposed on the side of the air-cooling component away from the film output transmission unit.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. The solar cells are hot-pressed by the first front roller hot-pressing module and the second front roller hot-pressing module to achieve sintering and solidification of the slurry. This ensures that the solar cells are fully contacted by the first front roller hot-pressing module and the second front roller hot-pressing module during the hot-pressing process, resulting in more uniform pressure on the solar cells and a better hot-pressing effect. It also ensures good contact between the grid lines and the substrate on the solar cells. In addition, after passing through the high-temperature area of ​​the first front roller hot-pressing module and the second front roller hot-pressing module during the hot-pressing process, the solar cells are driven backward by the first transmission belt and the second transmission belt to the first rear roller module and the second rear roller module. During this process, the temperature gradually decreases, and then the solar cells are conveyed to the output transmission unit. The solar cells are cooled down in the output transmission unit and then conveyed backward. The temperature of the solar cells can gradually change during the conveying process, resulting in better structural stability of the formed grid lines.

[0017] 2. The heating unit continuously heats the hot pressing roller so that the hot pressing roller is continuously in a high temperature state. The hot pressing of the paste on the battery cell can be completed by the first front roller hot pressing module and the second front roller hot pressing module, thereby continuously achieving the high temperature hot pressing effect on the battery cell.

[0018] 3. The heating lamp tube continuously heats the first front roller hot pressing module and the second front roller hot pressing module, thereby ensuring that the first front roller hot pressing module and the second front roller hot pressing module are always in a high-temperature environment. In addition, it also ensures that the battery cell, which is in a high-temperature state after being hot-pressed by the first front roller hot pressing module and the second front roller hot pressing module, is in a nitrogen atmosphere, thereby preventing the grid lines of the battery cell from being oxidized at high temperature and improving the performance of the battery cell after hot pressing.

[0019] 4. The preheating chamber can be used to heat the battery cells on the feeding transmission unit, thereby increasing the temperature of the battery cells during the feeding transmission unit. This reduces the temperature difference between the battery cells and the first and second front roller hot pressing modules, preventing damage to the battery cells during hot pressing due to a large temperature difference between the battery cells and the hot pressing unit.

[0020] 5. Multiple battery support components can simultaneously transport multiple battery cells, improving the transport efficiency of battery cells. Furthermore, the sensing component can detect battery cells entering the feed conveyor line, thereby achieving the effect of monitoring the status of the battery cells.

[0021] 6. The first and second transmission belts can be cleaned during the process of conveying the battery cells and moving them to the first and second front roller hot pressing modules, respectively. This ensures that the first and second transmission belts remain clean during the hot pressing of the battery cells, improves the surface cleanliness of the first and second transmission belts during the hot pressing of the battery cells, and separates the cleaning process from the battery cell conveying process, thereby avoiding any impact on the battery cells during conveying.

[0022] To make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of a hot pressing device for battery cell slurry in an embodiment of this utility model;

[0025] Figure 2 This is a schematic diagram of the hot pressing unit in an embodiment of this utility model;

[0026] Figure 3 This is a schematic diagram showing the positional relationship between the hot-pressing roller and the heating part in an embodiment of this utility model;

[0027] Figure 4 This is a schematic diagram of the feeding transmission unit in an embodiment of this utility model;

[0028] Figure 5This is a schematic diagram showing the positional relationship between the cleaning component and the second rear roller module in an embodiment of this utility model;

[0029] Figure 6 This is a schematic diagram of the structure of the cleaning component and the air knife component in the embodiment of this utility model;

[0030] Figure 7 This is a schematic diagram of the sheet feeding transmission unit and cooling unit in an embodiment of this utility model;

[0031] The reference numerals in the above figures are as follows: 1. Feeding drive unit; 11. Feeding drive streamline; 111. Roller; 112. Battery support assembly; 1121. Transmission ring; 12. Sensing assembly; 2. Hot pressing unit; 21. Upper roller assembly; 211. First front roller hot pressing module; 212. First rear roller module; 213. First transmission belt; 22. Lower roller assembly; 221. Second front roller hot pressing module; 222. Second rear roller module; 223. Second transmission belt; 3. 1. Film output transmission unit; 4. Hot press roller; 5. Heating section; 6. Heating module; 61. Heating chamber; 62. Heating lamp; 63. Nitrogen gas circulation device; 7. Preheating chamber; 8. Belt cleaning unit; 81. Cleaning component; 811. Brush; 812. Dust collection box; 82. Cleaning component; 821. Ultrasonic cleaning tank; 822. Limiting roller; 83. Air knife component; 9. Cooling unit; 91. Air-cooled component; 92. Water-cooled component; 10. Battery cell. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] like Figures 1 to 7 As shown, a hot pressing device for battery cell slurry in this embodiment includes a feeding transmission unit 1, a hot pressing unit 2, and an output transmission unit 3 arranged sequentially, wherein the hot pressing unit 2 includes:

[0034] The upper roller assembly 21 and the lower roller assembly 22 are located between the feeding transmission unit 1 and the output transmission unit 3. The upper roller assembly 21 and the lower roller assembly 22 are used to cooperate to heat press the slurry in the battery cell 10 and convey it backward.

[0035] The upper roller assembly 21 has a first front roller hot pressing module 211 adjacent to the film feeding transmission unit 1 and a first rear roller module 212 adjacent to the film output transmission unit 3. The upper roller assembly 21 has a first transmission belt 213 that is connected to the first front roller hot pressing module 211 and the first rear roller module 212. The first transmission belt 213 can continuously drive between the first front roller hot pressing module 211 and the first rear roller module 212.

[0036] The lower roller assembly 22 has a second front roller hot pressing module 221 adjacent to the infeed transmission unit 1 and a second rear roller module 222 adjacent to the outfeed transmission unit 3. The second front roller hot pressing module 221 is located below the first front roller hot pressing module 211, and the second rear roller module 222 is located below the first rear roller module 212. The lower roller assembly 22 has a second transmission belt 223 that is driveably connected to the second front roller hot pressing module 221 and the second rear roller module 222. The second transmission belt 223 can continuously drive between the second front roller hot pressing module 221 and the second rear roller module 222.

[0037] The first front roller hot pressing module 211 and the second front roller hot pressing module 221 are arranged adjacent to each other to hot press the battery cells 10 flowing out from the feeding transmission unit 1. Preferably, the first rear roller module 212 and the second rear roller module 222 are arranged adjacent to each other to roll the hot-pressed battery cells 10. Of course, in other optional embodiments, the relative positions of the first rear roller module 212 and the second rear roller module 222 can be adjusted according to actual needs. The first transmission belt 213 and the second transmission belt 223 are used to transport the hot-pressed battery cells 10 to the output transmission unit 3 via the first rear roller module 212 and the second rear roller module 222. The distance between the first rear roller module 212 and the second rear roller module 222 can be changed, thereby changing the distance between the first transmission belt 213 and the second transmission belt 223.

[0038] In this embodiment, after the slurry is patterned and transferred onto the solar cell 10, the solar cell 10 enters the feeding transmission unit 1. The feeding transmission unit 1 conveys the solar cell 10 backward. The solar cell 10 is conveyed from the feeding transmission unit 1 to between the first transmission belt 213 and the second transmission belt 223. When the solar cell 10 enters the first transmission belt 213 and the second transmission belt 223, it passes through the first front roller hot pressing module 211 and the second front roller hot pressing module 221 and is hot-pressed by the first front roller hot pressing module 211 and the second front roller hot pressing module 221. Preferably, the slurry is copper slurry. After that, the hot-pressed solar cell 10 continues to be conveyed backward with the first transmission belt 213 and the second transmission belt 223. After passing through the first rear roller module 212 and the second rear roller module 222, the solar cell 10 is conveyed to the exit transmission unit 3. The exit transmission unit 3 further conveys the hot-pressed solar cell 10 backward so that the solar cell 10 enters the subsequent processing station.

[0039] With the above structure, the battery cell 10 is hot-pressed by the first front roller hot-pressing module 211 and the second front roller hot-pressing module 221 to achieve sintering and solidification of the slurry. This allows the battery cell 10 to be fully contacted by the first front roller hot-pressing module 211 and the second front roller hot-pressing module 221 during the hot-pressing process, thereby making the pressure on the battery cell 10 more uniform and improving the hot-pressing effect of the battery cell 10. It also ensures good contact between the grid lines and the substrate on the battery cell 10. In addition, during the hot-pressing process, after passing through the high-temperature area where the first front roller hot-pressing module 211 and the second front roller hot-pressing module 221 are located, the battery cell 10 is driven backward by the first transmission belt 213 and the second transmission belt 223 to the first rear roller module 212 and the second rear roller module 222. During this process, the temperature gradually decreases, and then it is transported to the output transmission unit 3. It is cooled down in the output transmission unit 3 and then transported backward. The temperature of the battery cell 10 can gradually change during the transport process, resulting in better structural stability of the formed grid lines.

[0040] Specifically, such as Figure 2 and Figure 3As shown, both the first front roller hot pressing module 211 and the second front roller hot pressing module 221 include a hot pressing roller 4 and a heating part 5 located inside the hot pressing roller 4. The heating part 5 is used to heat the hot pressing roller 4, and the heating part 5 is also used to heat the first transmission belt 213 or the second transmission belt 223 located outside the hot pressing roller, so that the heating part 5 can raise the temperature of the hot pressing roller 4, thereby making the hot pressing roller 4 reach a high temperature state, and making the first transmission belt 213 or the second transmission belt 223 reach a high temperature state. The hot pressing rollers 4 of the first front roller hot pressing module 211 and the second hot pressing module cooperate with each other so that when the battery cell 10 passes through the two hot pressing rollers 4, the hot pressing rollers 4 themselves and the first transmission belt 213 or the second transmission belt 223 outside them are in a high temperature state, and the battery cell 10 is hot-pressed in this state. Thus, when the battery cell 10 passes through the first front roller hot pressing module 211 and the second front roller hot pressing module 221, the hot pressing effect of the slurry can be completed by the two hot pressing rollers 4 in a high temperature state.

[0041] With the above structure, the heating part 5 continuously heats the hot pressing roller 4 so that the hot pressing roller 4 is continuously in a high temperature state. The hot pressing of the paste on the battery cell 10 can be completed by the first front roller hot pressing module 211 and the second front roller hot pressing module 221, thereby continuously achieving the high temperature hot pressing effect on the battery cell 10.

[0042] Specifically, such as Figure 1 As shown, it also includes a heating module 6, which has a heating cavity 61 located outside the first front roller hot pressing module 211 and the second front roller hot pressing module 221. The heating cavity 61 has a heating lamp 62 adjacent to the first front roller hot pressing module 211, so that the heating lamp 62 can heat the heating cavity 61. The heating lamp 62 is particularly used to heat a portion of the heating cavity 61 around the first front roller hot pressing module 211 and the second front roller hot pressing module 221, so that the first front roller hot pressing module 211 and the second front roller hot pressing module 221 can be continuously heated in the heating cavity 61, thereby ensuring that the first front roller hot pressing module 211 and the second front roller hot pressing module 221 are in a high temperature state. The heating chamber 61 has a nitrogen gas flow device 63, which fills the heating chamber 61 with nitrogen gas, thereby making the first front roller hot pressing module 211 and the second front roller hot pressing module 221 in a nitrogen atmosphere. This allows the hot-pressed battery cell 10 to be in a nitrogen atmosphere, thus preventing the slurry at high temperature after hot pressing from being oxidized by oxygen.

[0043] With the above structure, the heating lamp tube 62 continuously heats the first front roller hot pressing module 211 and the second front roller hot pressing module 221, thereby ensuring that the first front roller hot pressing module 211 and the second front roller hot pressing module 221 are always in a high-temperature environment. In addition, it also ensures that the battery cell 10, which is in a high-temperature state after being hot-pressed by the first front roller hot pressing module 211 and the second front roller hot pressing module 221, is in a nitrogen atmosphere, thereby preventing the grid lines of the battery cell 10 from being oxidized at high temperatures and improving the performance of the battery cell 10 after hot pressing.

[0044] Specifically, such as Figure 1 As shown, the heating module 6 further includes a preheating chamber 7, which is located outside the feeding transmission unit 1 and extends along the transmission direction of the feeding transmission unit 1. Preferably, the preheating chamber 7 has a preheating lamp above the extending direction of the feeding transmission unit 1, so that the battery cell 10 can be heated during the process of being conveyed by the feeding transmission unit 1, thereby achieving the effect of preheating the battery cell 10, so that the battery cell 10 and the slurry on it are heated before being hot-pressed by the hot-pressing unit 2, thereby reducing the temperature difference between the battery cell 10 and the first front roller hot-pressing module 211 and the second front roller hot-pressing module 221.

[0045] With the above structure, the preheating chamber 7 can heat the battery cell 10 on the feeding transmission unit 1, thereby causing the battery cell 10 to heat up during the feeding transmission unit 1, so as to reduce the temperature difference between the battery cell 10 and the first front roller hot pressing module 211 and the second front roller hot pressing module 221, and avoid the situation where the temperature difference between the battery cell 10 and the hot pressing unit 2 is too large, which would damage the battery cell 10 during hot pressing.

[0046] Specifically, such as Figure 4As shown, the feeding transmission unit 1 includes a feeding transmission streamline 11 and a sensing component 12 located at the front end of the feeding transmission streamline 11. The feeding transmission streamline 11 includes a roller 111 extending laterally perpendicular to the conveying direction of the battery cell 10 and a plurality of battery support components 112 located outside the roller 111 along the extension direction of the roller 111. The roller 111 is used to rotate in its own circumference and drive the battery support components 112 to rotate. Each battery support component 112 includes two spaced and oppositely arranged transmission rings 1121. The transmission rings 1121 have an abutting ring surface for supporting the battery cell 10. The battery cell 10 is used to be placed on the abutting ring surface and conveyed forward during the rotation of the abutting ring surface. The plurality of battery support components 112 allows multiple battery cells 10 to be conveyed simultaneously. The sensing component 12 is used to sense the battery cell 10 entering the front end of the feeding conveyor 11. In this embodiment, the sensing component 12 is a position sensor disposed at the front end of the feeding conveyor 11. Of course, in other optional embodiments, the structure of the sensing component 12 can be adjusted according to the actual situation.

[0047] With the above structure, multiple battery support components 112 can simultaneously transport multiple battery cells 10, improving the transport efficiency of the battery cells 10. Furthermore, the sensing component 12 can sense the battery cells 10 entering the feed conveyor 11, thereby achieving the effect of monitoring the status of the battery cells 10.

[0048] Specifically, such as Figure 1 , Figure 5 and Figure 6 As shown, it also includes a belt cleaning unit 8, which includes a cleaning component 81, a washing component 82, and an air knife component 83 on the movement paths of the first transmission belt 213 and the second transmission belt 223. The cleaning component 81 is used to clean dust or slurry and other impurities on the first transmission belt 213 and the second transmission belt 223. The washing component 82 is used to wash the first transmission belt 213 and the second transmission belt 223. The air knife component 83 is used to air dry the first transmission belt 213 and the second transmission belt 223 after cleaning, so that the first transmission belt 213 after passing through the first front roller hot pressing module 211 and the second transmission belt 223 after passing through the second front roller hot pressing module 221 can both remain clean and dry.

[0049] During the movement of the first transmission belt 213 from the first rear roller module 212 to the first front roller hot pressing module 211, the cleaning component 81, the washing component 82, and the air knife component 83 are sequentially arranged. This allows the first transmission belt 213 to be cleaned after the battery cell 10 is moved from the first front roller hot pressing module 211 to the first rear roller module 212. The cleaning process is separate from the conveying process of the battery cell 10, thereby avoiding any impact on the battery cell 10 during the conveying process.

[0050] During the movement of the second transmission belt 223 from the second rear roller module 222 to the second front roller hot pressing module 221, the cleaning component 81, the washing component 82, and the air knife component 83 are sequentially arranged, so that the second transmission belt 223 can be cleaned after the battery cell 10 is moved from the second front roller hot pressing module 221 to the second rear roller module 222. Preferably, during the movement of the first transmission belt 213 and the second transmission belt 223, the cleaning component 81 and the air knife component 83 continuously clean and blow air on the first transmission belt 213 and the second transmission belt 223, and the washing component 82 washes the first transmission belt 213 and the second transmission belt 223 at predetermined intervals. Of course, in other optional embodiments, the timing of the action of the cleaning component 81, the washing component 82, and the air knife component 83 on the first transmission belt 213 and the second transmission belt 223 can be adjusted according to actual needs.

[0051] With the above structure, the first transmission belt 213 and the second transmission belt 223 can be cleaned during the process of conveying the battery cell 10 and moving it to the first front roller hot pressing module 211 and the second front roller hot pressing module 221 respectively. This ensures that the first transmission belt 213 and the second transmission belt 223 remain clean during the hot pressing of the battery cell 10, improves the surface cleanliness of the first transmission belt 213 and the second transmission belt 223 during the hot pressing of the battery cell 10, and also separates the cleaning process from the conveying process of the battery cell 10, thereby avoiding any impact on the conveyed battery cell 10.

[0052] Specifically, such as Figure 5As shown, the cleaning component 81 includes a brush 811 for contacting the first transmission belt 213 or the second transmission belt 223 and a dust collection box 812 located below the brush 811. The dust collection box 812 is detachably installed below the brush 811, so that after the first transmission belt 213 or the second transmission belt 223 has finished conveying the battery cell 10, the brush 811 can collect the slurry or dust and other impurities on its upper surface into the dust collection box 812 below the brush 811. The detachable installation of the dust collection box 812 below the brush 811 ensures that the waste in the dust collection box 812 can be cleaned in a timely manner.

[0053] Specifically, such as Figure 6 As shown, the cleaning assembly 82 includes an ultrasonic cleaning tank 821 and a limiting roller 822 for pressing the first drive belt 213 or the second drive belt 223 into the ultrasonic cleaning tank 821. The limiting roller 822 is used to press a portion of the first drive belt 213 or the second drive belt 223 into the ultrasonic cleaning tank 821. The ultrasonic cleaning tank 821 is used to clean the portion of the first drive belt 213 or the second drive belt 223 pressed into it by the limiting roller 822. Since the first drive belt 213 and the second drive belt 223 are continuously driven, the entire first drive belt 213 or the second drive belt 223 can be cleaned.

[0054] Specifically, such as Figure 6 As shown, the air knife assembly 83 is located behind the ultrasonic cleaning tank 821, and the air outlet of the air knife assembly 83 faces the first transmission belt 213 or the second transmission belt 223 to air dry the first transmission belt 213 or the second transmission belt 223 after cleaning. The air knife assembly 83 is used to air dry the first transmission belt 213 or the second transmission belt 223 after cleaning, so that the first transmission belt 213 returning to the first front roller hot pressing module 211 and the second transmission belt 223 returning to the second front roller hot pressing module 221 can maintain a clean and dry effect, thereby ensuring that the first transmission belt 213 and the second transmission belt 223 are in a clean and dry state every time the battery cell 10 is hot pressed.

[0055] Specifically, such as Figure 7As shown, it also includes a cooling unit 9 located near the wafer ejection transmission unit 3. The cooling unit 9 includes an air-cooling component 91 located opposite the wafer ejection transmission unit 3 and a water-cooling component 92 located on the side of the air-cooling component 91 away from the wafer ejection transmission unit 3. The air-cooling component 91 blows the cooled gas in the water-cooling component 92 onto the battery cell 10 located on the wafer ejection transmission unit 3 to cool the battery cell 10, so that the battery cell 10 flowing out of the wafer ejection transmission unit 3 can be kept in a cooled state, thereby having better stability.

[0056] This utility model uses specific embodiments to illustrate the principle and implementation of the utility model. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the utility model. Therefore, the content of this specification should not be construed as a limitation of the utility model.

Claims

1. A hot pressing device for battery cell slurry, characterized in that, It includes a film feeding drive unit, a hot pressing unit, and a film output drive unit arranged sequentially, wherein the hot pressing unit includes: The upper roller assembly and the lower roller assembly are located between the infeed transmission unit and the outfeed transmission unit; The upper roller assembly has a first front roller hot pressing module adjacent to the film feeding transmission unit and a first rear roller module adjacent to the film output transmission unit, and the upper roller assembly has a first transmission belt that is drively connected to the first front roller hot pressing module and the first rear roller module; The lower roller assembly has a second front roller hot pressing module adjacent to the infeed transmission unit and a second rear roller module adjacent to the outfeed transmission unit, and the lower roller assembly has a second transmission belt that is drively connected to the second front roller hot pressing module and the second rear roller module; The first front roller hot pressing module and the second front roller hot pressing module are arranged adjacent to each other to hot press the solar cells flowing out from the feeding transmission unit. The first transmission belt and the second transmission belt are used to transport the hot-pressed solar cells to the output transmission unit via the first rear roller module and the second rear roller module.

2. The hot pressing equipment for battery cell slurry according to claim 1, characterized in that, Both the first front roller hot pressing module and the second front roller hot pressing module include a hot pressing roller and a heating part located inside the hot pressing roller. The heating part is used to heat the hot pressing roller, and the heating part is also used to heat the first transmission belt or the second transmission belt located outside the hot pressing roller.

3. The hot pressing equipment for battery cell slurry according to claim 1, characterized in that, It also includes a heating module, which has a heating cavity located outside the first front roller hot pressing module and the second front roller hot pressing module. The heating cavity has a heating lamp tube adjacent to the first front roller hot pressing module and a nitrogen gas circulation device.

4. A hot pressing device for battery cell slurry according to claim 3, characterized in that, The heating module further includes a preheating cavity, which is located outside the wafer feeding transmission unit and extends along the transmission direction of the wafer feeding transmission unit.

5. A hot pressing device for battery cell slurry according to claim 1, characterized in that, The feeding transmission unit includes a feeding transmission streamline and a sensing component located at the front end of the feeding transmission streamline. The feeding transmission streamline includes a roller extending laterally perpendicular to the cell conveying direction and a plurality of cell support components located outside the roller along the extension direction of the roller. Each cell support component includes two spaced and oppositely arranged transmission rings. The transmission rings have abutment ring surfaces for supporting the cells. The sensing component is used to sense the cells entering the front end of the feeding transmission streamline.

6. A hot pressing device for battery cell slurry according to claim 1, characterized in that, It also includes a belt cleaning unit, which includes a cleaning component, a washing component, and an air knife component on the movement paths of the first transmission belt and the second transmission belt; During the movement of the first transmission belt from the first rear roller module to the first front roller hot pressing module, the cleaning component, the washing component, and the air knife component are sequentially arranged. As the second transmission belt moves from the second rear roller module to the second front roller hot pressing module, the cleaning component, washing component, and air knife component are sequentially arranged.

7. A hot pressing device for battery cell slurry according to claim 6, characterized in that, The cleaning assembly includes a brush for contacting the first or second drive belt and a dust collection box located below the brush, the dust collection box being detachably mounted below the brush.

8. A hot pressing device for battery cell slurry according to claim 6, characterized in that, The cleaning assembly includes an ultrasonic cleaning tank and a limiting roller for pressing the first or second drive belt into the ultrasonic cleaning tank. The limiting roller is used to press a portion of the first or second drive belt into the ultrasonic cleaning tank.

9. A hot pressing device for battery cell slurry according to claim 8, characterized in that, The air knife assembly is located behind the ultrasonic cleaning tank, and the air outlet of the air knife assembly is directly facing the first transmission belt or the second transmission belt to air dry the first transmission belt or the second transmission belt after cleaning.

10. A hot pressing device for battery cell slurry according to claim 1, characterized in that, It also includes a cooling unit located near the film output transmission unit, the cooling unit comprising an air-cooling component located opposite the film output transmission unit and a water-cooling component located on the side of the air-cooling component away from the film output transmission unit.

Images