A screen printing device to prevent battery cells from bending when cooled.

Abstract

This invention relates to the field of battery cell manufacturing technology, specifically to a screen printing device for preventing battery cells from bending during cooling. The device includes a cooling furnace, a furnace belt, and two leveling mechanisms. Each leveling mechanism includes a circulating insulating tape and a heating mechanism. The circulating insulating tape has multiple perforations spaced at equal intervals, with the distance between any adjacent perforations being the same as the distance between two adjacent battery cells during transport. The heating mechanism includes two heating structures and a receiving / conveying mechanism. The receiving / conveying mechanism is connected to the two heating structures and is used for the synchronous, opposite movement of the two heating structures. When the two heating structures are far apart, they respectively connect to two perforations and are used to receive and deliver the perforations. When the two heating structures are in contact, the perforation transitions from the front heating structure to the rear heating structure. This invention, with its two heating structures and receiving / conveying mechanism, achieves continuous and effective utilization of heat, thereby reducing energy consumption.

Description

Technical Field

[0001] This invention relates to the field of battery cell manufacturing technology, specifically to a screen printing device that prevents battery cells from bending when cooled. Background Technology

[0002] In the production of solar cells, screen printing is one of the key processes. After sintering, the solar cells need to be cooled in a furnace. However, during the cooling process, due to the inconsistent rate of temperature change in different parts, the solar cells are prone to bending, with the center arching upwards or downwards. This not only affects the appearance quality of the solar cells but also adversely impacts subsequent processes such as module encapsulation, reducing the product's yield and reliability.

[0003] Patent CN117124706B discloses a screen printing device for battery cells. Its working principle is as follows: During use, a conveyor belt feeds sintered battery cells from a sintering furnace into a cooling furnace. An infrared detector checks the flatness of the battery cells. When an upward arch is detected in the middle of the battery cell, the perforations on the lower insulating heat line move from the top of the feeding position along with the battery cell. The perforations on the insulating heat line follow the battery cell along the perforation groove, maintaining a position corresponding to the middle of the battery cell, while the perforations on the upper insulating heat line move away from the perforation groove. When a downward arch is detected in the middle of the battery cell, the perforations on the upper insulating heat line move from the bottom of the feeding position along with the battery cell, while the perforations on the lower insulating heat line move away from the perforation groove. This ensures that during the movement of the battery cell in the cooling furnace, the middle of the reverse side of the arched surface receives heat from the perforation.

[0004] Although the above solution ensures that the arched part in the middle of the cell is continuously heated, the slot needs to be long enough to ensure that the cell is continuously heated. This causes heat to continuously escape from the slot. Heat can only act on the middle of the cell through the perforation when the perforation passes through the slot. The heat in the rest of the slot will dissipate, resulting in serious energy waste. Summary of the Invention

[0005] To address the aforementioned issues, a screen printing device is provided to prevent battery cells from bending due to cooling. By controlling the synchronous reverse movement of two heating structures through a conveying mechanism, heat can be continuously and effectively utilized, thereby reducing energy consumption.

[0006] To address the problems of existing technologies, this invention provides a screen printing device for preventing solar cells from bending during cooling. The device includes a cooling furnace, a conveyor belt for horizontally conveying solar cells through the cooling furnace, and two leveling mechanisms arranged horizontally in mirror image of the conveyor belt. Each leveling mechanism includes a circulating insulating tape and a heating mechanism located in the middle of the circulating insulating tape. Multiple perforations are evenly spaced on the circulating insulating tape, with the distance between any adjacent perforations being the same as the distance between two adjacent solar cells during transport. The heating mechanism includes two heating structures and a receiving / conveying mechanism. The two heating structures are connected end-to-end and parallel to the movement path of the solar cells. The receiving / conveying mechanism is connected to the two heating structures and is used for synchronous, opposite-direction movement of the two heating structures. When the two heating structures are far apart, they respectively connect to two perforations and are used to receive and deliver the perforations. When the two heating structures are in contact with each other, the perforation transitions from the front heating structure to the rear heating structure.

[0007] Preferably, the heating structure includes an insulated box, a cover plate, and a heating component; the insulated box is connected to the receiving mechanism; the cover plate covers the upper end of the insulated box, and a heating groove that mates with the perforation is opened on the cover plate; the heating component is installed inside the insulated box, and the heating component is externally connected to a waste heat supply device.

[0008] Preferably, the heating structure further includes a partition structure, which is disposed on the cover plate and is used to control the opening and closing of the heating tank.

[0009] Preferably, the length of the heating groove is the same as the length of the perforation, and the moving speed of the circulating insulation tape is the same as the moving speed of the insulation box.

[0010] Preferably, the length of the heating groove is greater than the length of the perforation, and the moving speed of the circulating insulation tape is greater than the moving speed of the insulation box.

[0011] Preferably, the partition structure includes two partition members and an opening and closing drive structure; the two partition members are respectively disposed on both sides of the heating tank, and the partition members are provided with rotating shafts that are rotatably connected to the heat insulation box; the opening and closing drive structure is connected to the two rotating shafts and is used to drive the two rotating shafts to rotate in opposite directions.

[0012] Preferably, the opening and closing drive structure includes a first guide rod, two moving blocks, and two gear and rack transmission assemblies; the first guide rod is horizontally arranged and perpendicular to the two rotating shafts; both moving blocks are slidably arranged on the first guide rod; the two ends of the gear and rack transmission assemblies are respectively connected to the moving blocks and the rotating shafts.

[0013] Preferably, the opening and closing drive structure further includes a linear driver and two drive plates; the linear driver is disposed between the two moving blocks; both drive plates are connected to the output end of the linear driver, and the two drive plates are respectively hinged to the two moving blocks.

[0014] Preferably, the heating assembly includes multiple heating elements, an inlet pipe, and an outlet pipe; both ends of the multiple heating elements extend out of the heat insulation box; the inlet pipe is connected to the inlet end of the multiple heating elements; and the outlet pipe is connected to the outlet end of the multiple heating elements.

[0015] Preferably, the receiving mechanism includes a guide structure and a bidirectional drive structure; the guide structure is connected to the two insulated boxes and is used to limit the direction of movement of the insulated boxes; the bidirectional drive structure is used to drive the two insulated boxes to move on the guide structure.

[0016] The advantages of this invention compared to the prior art are:

[0017] 1. This invention features two heating structures and a receiving / conveying structure. The receiving / conveying mechanism controls the synchronous and reverse movement of the two heating structures. The front heating structure applies force to the battery cell in advance, allowing the battery cell to connect with the heating structure earlier. The rear heating structure delays the separation of the battery cell, extending the connection between the battery cell and the heating structure. This allows the two shorter heating structures to cover the entire path length required for the battery cell to be leveled, eliminating the need for a single heating structure with a length equal to the path length. This ensures continuous and effective utilization of heat, thereby reducing energy consumption.

[0018] 2. This invention includes a heat insulation box, a cover plate, and heating components. When the states of the front and rear battery cells are different, the heating components of the front and rear sections can be controlled to work or stop separately. When the states are the same, they work continuously, forming multiple working combinations. This ensures precise heating of the battery cells that require heating, preventing them from bending due to cooling, while avoiding ineffective heating of battery cells that do not need heating, thus improving energy utilization. At the same time, it ensures the continuity and efficiency of production, thereby realizing the continuous processing needs of battery cells in different states.

[0019] 3. This invention features a partition structure. When heating of the battery cells is required, the heating component starts heating, the partition structure opens the heating slot, and the heat insulation box moves to align the heating slot with the perforation, allowing heat radiation to act on the battery cells, achieving effective and even heating. When heating is not required, the heating component stops working, the partition structure closes the heating slot, preventing heat leakage and reducing heat loss, allowing the heat insulation box to retain residual heat. When restarted, the heat insulation box still has a high temperature, and the heating component can quickly raise the temperature to the working state, thus avoiding the problem that the heating component needs a long heating time to reach the working temperature when restarting. Attached Figure Description

[0020] Figure 1 This is a perspective view of a screen printing device for preventing battery cells from bending due to cooling, according to the present invention.

[0021] Figure 2 This is a left view of a screen printing apparatus for preventing battery cells from bending due to cooling, according to the present invention.

[0022] Figure 3 yes Figure 2 A three-dimensional sectional view at point AA.

[0023] Figure 4 This is a perspective view of the heating structure and conveying mechanism in a screen printing device for preventing battery cells from bending due to cooling, according to the present invention.

[0024] Figure 5 This is a perspective view of the heat insulation box, cover plate, heating component, and partition structure in a screen printing device for preventing battery cells from bending due to cooling, according to the present invention.

[0025] Figure 6 This is a cross-sectional view of the circulating insulation tape, heat insulation box, and cover plate in a screen printing device for preventing battery cells from bending during cooling, according to the present invention.

[0026] Figure 7 This is a left view of the circulating insulation tape and heating mechanism in a screen printing device for preventing battery cells from bending due to cooling, according to the present invention.

[0027] Figure 8 yes Figure 7 Sectional view at point BB.

[0028] Figure 9 This is a perspective view of the heat insulation box and partition structure in a screen printing device for preventing battery cells from bending due to cooling, according to the present invention.

[0029] Figure 10 This is a perspective view of a partition and opening / closing drive structure in a screen printing device for preventing battery cells from bending due to cooling, according to the present invention.

[0030] Figure 11 This is a perspective view of the heat insulation box and the conveying mechanism in a screen printing device for preventing battery cells from bending due to cooling, according to the present invention.

[0031] Figure 12 This is a perspective view of the guiding structure and bidirectional drive structure in a screen printing device for preventing battery cells from bending due to cooling, according to the present invention.

[0032] The diagram is labeled as follows: 1. Cooling furnace; 2. Furnace belt; 3. Circulating insulation belt; 31. Perforation; 4. Heating structure; 41. Insulation box; 42. Cover plate; 421. Heating tank; 43. Heating assembly; 431. Heating body; 432. Inlet pipe; 433. Outlet pipe; 44. Partition structure; 441. Partition component; 4411. Rotating shaft; 442. Opening and closing drive structure; 4421. First guide rod; 4422. Moving block; 4423. Gear and rack transmission assembly; 4424. Linear actuator; 4425. Drive plate; 5. Conveying mechanism; 51. Guide structure; 511. Horizontal plate; 512. Second guide rod; 513. Connecting block; 52. Bidirectional drive structure; 521. Slider; 522. Bidirectional slide table; 523. Drive rod. Detailed Implementation

[0033] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0034] Reference Figures 1 to 12 The image shows a screen printing device for preventing solar cells from bending during cooling. It includes a cooling furnace 1, a furnace belt 2 for horizontally conveying solar cells through the cooling furnace 1, and two leveling mechanisms arranged horizontally mirror-image of the furnace belt 2. Each leveling mechanism includes a circulating insulating belt 3 and a heating mechanism located in the middle of the circulating insulating belt 3. The circulating insulating belt 3 has multiple perforations 31 spaced at equal intervals, with the distance between any adjacent perforations 31 being the same as the distance between two adjacent solar cells during transport. The heating mechanism includes two heating structures 4 and a receiving mechanism 5. The two heating structures 4 are connected end-to-end and parallel to the movement path of the solar cells. The receiving mechanism 5 is connected to the two heating structures 4 and is used for synchronous reverse movement of the two heating structures 4. When the two heating structures 4 are far apart, they respectively connect to the two perforations 31 and are used to receive and deliver the perforations 31. When the two heating structures 4 are in contact with each other, the perforations 31 transition from the front heating structure 4 to the rear heating structure 4.

[0035] The furnace belt 2 smoothly transports the sintered solar cells from the sintering furnace to the cooling furnace 1. During this process, the equipment activates the corresponding leveling mechanism according to the arching state of the solar cells. If the middle of the solar cell arches downwards, the leveling mechanism above the furnace belt 2 is activated; if the middle of the solar cell arches upwards, the leveling mechanism below the furnace belt 2 is responsible for the leveling operation. Taking the case where the middle of the solar cell arches upwards as an example, after the solar cell enters the cooling furnace 1, the circulating insulating belt 3 starts to operate, with a perforation 31 on it corresponding to the middle of the solar cell. At this time, the receiving mechanism 5 first drives the two heating structures 4 to move away from each other, and the heating structure 4 at the front moves towards the perforation 31, eventually connecting with the perforation 31. The heat provided by the heating structure 4 can directly act on the middle of the solar cell through the perforation 31, heating that part. Immediately afterwards, the receiving mechanism 5 drives the two heating structures 4 to move closer to each other, so that the front heating structure 4... The heating structure 4 and the perforation 31 on the circulating insulation tape 3 move in the same direction, so that the heat from the front heating structure 4 can continuously act on the middle of the battery cell through the perforation 31. When the two heating structures 4 come into contact with each other, the circulating insulation tape 3 moves the perforation 31 to the rear heating structure 4. Then the receiving mechanism 5 drives the two heating structures 4 to move away from each other again. The rear heating structure 4 moves in the same direction with the perforation 31, continuously providing heat to the middle of the battery cell, while the front heating structure 4 moves toward the next perforation 31 on the circulating insulation tape 3, preparing for the next battery cell that needs to be flattened. By controlling the synchronous reverse movement of the two heating structures 4 through the receiving mechanism 5, the two shorter heating structures 4 can cover the entire path length required for the movement during the flattening of the battery cell, without the need to use a single heating structure 4 with a length equivalent to the path, thereby achieving continuous and effective utilization of heat and reducing energy consumption.

[0036] Reference Figure 3 and Figure 4 As shown: The heating structure 4 includes an insulation box 41, a cover plate 42 and a heating component 43; the insulation box 41 is connected to the receiving mechanism 5; the cover plate 42 covers the upper end of the insulation box 41, and the cover plate 42 has a heating groove 421 that mates with the through hole 31; the heating component 43 is installed inside the insulation box 41, and the heating component 43 is externally connected to a waste heat supply device.

[0037] Taking the case where the middle of the solar cell arches upwards as an example, when a solar cell enters the cooling furnace 1, the corresponding perforation 31 on the circulating insulation belt 3 aligns with the middle of the solar cell. The receiving mechanism 5 drives the two heating structures 4 to move away from each other. The heat insulation box 41 of the front heating structure 4 moves towards the perforation 31 under the drive of the receiving mechanism 5. At this time, the heating component 43 of the front heating structure 4 is activated to heat the air inside the heat insulation box 41. As the heat insulation box 41 moves, the heating groove 421 on the cover plate 42 connects with the perforation 31. The heat radiation inside the heat insulation box 41 acts on the middle of the solar cell through the heating groove 421 and the perforation 31. During the process of the solar cell moving with the furnace belt 2 and transitioning to the rear heating structure 4, the heating component 43 of the rear heating structure 4 is activated synchronously to continuously heat the middle of the solar cell. When the solar cell is completely transferred to the rear heating structure 4, the two heating structures 4 move away from each other, and the heat insulation box 41 of the front heating structure 4 moves towards the next perforation 31 on the circulating insulation belt 3. If the next solar cell... When the solar cell does not require heating, or when the leveling mechanism at the top of the furnace belt 2 is needed, the heating component 43 of the front heating structure 4 stops heating the air inside the heat insulation box 41. At this time, even if its heating groove 421 aligns with the next perforation 31, no heat will be generated and applied to the solar cell. If the next solar cell is still arched upwards in the middle, the heating component 43 of the front heating structure 4 continues to work. After its heat insulation box 41 moves to the corresponding perforation 31 and completes the alignment, heat radiation acts on the middle of the new solar cell through the heating groove 421 and the perforation 31. After the rear heating structure 4 completes the heating of the current solar cell, if there are no solar cells of the same state to be processed, its heating component 43 can also stop working and be restarted when needed. Through the independent working mode of the heating components 43 in the two heating structures 4, various working combinations are formed: such as the front working and the rear stopping, the front stopping and the rear working, both working at the same time or stopping at the same time, etc., thereby realizing the continuous processing needs of solar cells in different states.

[0038] Reference Figure 3 , Figure 4 and Figure 5 As shown: The heating structure 4 also includes a partition structure 44, which is disposed on the cover plate 42 and is used to control the opening and closing of the heating tank 421.

[0039] When the heating structure 4 needs to provide heat to the battery cells, for example, when the front heating structure 4 needs to heat the upward-arched battery cell in the middle, the heating component 43 starts to heat the air inside the heat insulation box 41. At the same time, the partition structure 44 moves to open the heating groove 421 on the cover plate 42. As the heat insulation box 41 moves under the drive of the receiving mechanism 5, the heating groove 421 of the cover plate 42 connects with the perforation 31 of the circulating heat insulation tape 3. Since the heating groove 421 is in the open state, the heat radiation inside the heat insulation box 41 can act on the battery cells through the heating groove 421 and the perforation 31 to achieve effective heating and flattening. When the heating structure 4 does not need to provide heat to the battery cells, for example, when the next battery cell is not arched or the arching direction is different, the heating component 43 will stop generating heat. At this time, the partition structure 44 closes the heating groove 421 on the cover plate 42. The closed structure effectively prevents heat from escaping through the heating groove 421 inside the heat insulation box 41, reducing heat loss and slowing down the rate at which the temperature inside the heat insulation box 41 decreases. This allows the heat insulation box 41 to retain a certain amount of residual heat. When the heating structure 4 needs to be restarted, for example, if the same arched battery cells reappear, the heating component 43 will restart to heat the air inside the heat insulation box 41. Since there is a certain amount of residual heat inside the heat insulation box 41, the temperature can quickly rise to the required operating temperature under the action of the heating component 43, without having to reheat from a lower temperature, thus saving heating time. By controlling the opening and closing of the heating groove 421 through the partition structure 44, the heat inside the heat insulation box 41 can be effectively locked when the heating component 43 stops working, reducing heat loss and thus avoiding the problem that the heating component 43 needs to be heated for a long time to reach the operating temperature when restarting.

[0040] Reference Figure 3 and Figure 6 As shown: the length of the heating groove 421 is the same as the length of the perforation 31, and the moving speed of the circulating insulation tape 3 is the same as the moving speed of the insulation box 41.

[0041] When the heating groove 421 and the perforation 31 are of the same length, after they are connected, the heating groove 421 can completely overlap with the perforation 31, ensuring that the heat radiation in the heat insulation box 41 can be evenly applied to the corresponding part of the battery cell through the heating groove 421 and the perforation 31. When the heat insulation box 41 moves with the receiving mechanism 5 and moves synchronously with the perforation 31 on the circulating heat insulation tape 3, because the two move at the same speed, the heating groove 421 and the perforation 31 can always maintain a stable connection state and there will be no misalignment caused by relative displacement. This allows the heat radiation to be continuously and stably transferred to the battery cell, avoiding the interruption or unevenness of heat transfer caused by speed differences, ensuring the consistency of the heating effect on the battery cell, and thus realizing the efficient utilization of heat in the heat insulation box 41.

[0042] Reference Figure 7 and Figure 8As shown: the length of the heating tank 421 is greater than the length of the perforation 31, and the moving speed of the circulating insulation tape 3 is greater than the moving speed of the insulation box 41.

[0043] When the length of the heating groove 421 is greater than the length of the perforation 31, one end of the heating groove 421 will first connect with the perforation 31. The heat radiation inside the heat insulation box 41 acts on the battery cell through the heating groove 421 and the perforation 31. Subsequently, the circulating heat insulation tape 3 moves in the same direction as the heat insulation box 41, but the annular heat insulation tape moves faster, causing relative sliding between the perforation 31 and the heating groove 421. The perforation 31 gradually moves from one end of the heating groove 421 to the other end. During this process, the heating groove 421 always completely covers the perforation 31, and the heat radiation continues to act on the middle of the battery cell through the perforation 31. When the perforation 31 moves to the other end of the heating groove 421, the two heat insulation boxes 41 are just connected. At this time, the perforation 31 moves with the annular heat insulation tape to the heating groove 421 of the rear heating structure 4. Since the length of the rear heating groove 421 is also greater than that of the perforation 31, the perforation 31 enters the rear section first. At one end of the heating groove 421, the annular insulating tape and the rear heat insulation box 41 continue to move in the same direction, with the annular insulating tape moving faster. The perforation 31 slides from one end to the other within the rear heating groove 421. During this process, the rear heating groove 421 continuously covers the perforation 31 to ensure the continuity of heat transfer until the perforation 31 is completely removed from the rear heating groove 421, thus completing the heating and flattening of the middle part of the battery cell. By setting the length of the heating groove 421 to be greater than the length of the perforation 31, the heating groove 421 only needs to move a shorter distance to enable the perforation 31 to move within a longer heating coverage area, which greatly improves the heating efficiency. It is not necessary for the heating groove 421 to move a distance equal to the heating coverage area, thereby reducing the travel distance of the heat insulation box 41. This not only saves the space required for equipment operation but also reduces the energy consumption of the receiving mechanism 5 in driving the heat insulation box 41.

[0044] Reference Figure 5 , Figure 9 and Figure 10 As shown: The partition structure 44 includes two partition members 441 and an opening and closing drive structure 442; the two partition members 441 are respectively arranged on both sides of the heating tank 421, and the partition members 441 are provided with rotating shafts 4411 that are rotatably connected to the heat insulation box 41; the opening and closing drive structure 442 is connected to the two rotating shafts 4411 and is used to drive the two rotating shafts 4411 to rotate in opposite directions.

[0045] When the heating structure 4 needs to provide heat to the battery cell, the opening and closing drive structure 442 is activated, driving the two rotating shafts 4411 to rotate in opposite directions. The partitions 441 located on both sides of the heating groove 421 rotate away from the center of the heating groove 421 under the drive of the rotating shafts 4411, gradually opening the heating groove 421. As the partitions 441 rotate, the opening of the heating groove 421 gradually expands until it is fully open. At this time, the heat convection generated by the heating component 43 inside the heat insulation box 41 can act on the middle of the battery cell through the heating groove 421 and the perforation 31. When the thermal structure 4 does not need to provide heat to the battery cells, the two partitions 441 rotate towards the center of the heating tank 421 under the drive of the rotating shaft 4411, gradually closing the heating tank 421. When the two partitions 441 abut against each other, the heating tank 421 is completely closed, effectively preventing the heat in the heat insulation box 41 from being lost through the heating tank 421, so that more residual heat can be retained in the heat insulation box 41. The opening and closing drive structure 442 drives the two partitions 441 to rotate in opposite directions around the rotating shaft 4411, thereby realizing the rapid opening and closing of the heating tank 421.

[0046] Reference Figure 9 and Figure 10 As shown: The opening and closing drive structure 442 includes a first guide rod 4421, two moving blocks 4422 and two gear and rack transmission assemblies 4423; the first guide rod 4421 is horizontally arranged and perpendicular to the two rotating shafts 4411; the two moving blocks 4422 are slidably arranged on the first guide rod 4421; the two ends of the gear and rack transmission assembly 4423 are respectively connected to the moving blocks 4422 and the rotating shafts 4411.

[0047] The two movable blocks 4422 move away from each other along the first guide rod 4421. Since the movable blocks 4422 are connected to the rack, the linear motion of the movable blocks 4422 drives the rack to move synchronously. The rack meshes with the gear, and the movement of the rack drives the gear to rotate. Therefore, the rotation of the gear directly drives the rotating shaft 4411 to rotate. As the two movable blocks 4422 move away from each other, they drive the two rotating shafts 4411 to rotate in opposite directions through the corresponding gear and rack transmission components 4423. This, in turn, drives the partitions 441 on both sides of the heating tank 421 to rotate away from the center of the heating tank 421, causing the heating tank 421 to gradually open. As the two movable blocks 4422 continue to move away from each other, the rotation angle of the partitions 441 continuously increases until the heating tank 421 is fully open. At this point, the movable blocks 4422 stop moving, maintaining the open state of the heating tank 421, ensuring that thermal radiation energy can smoothly pass through the heating tank 421 and the perforation 31 to act on the... When the heating tank 421 needs to be closed, the two moving blocks 4422 move closer to each other along the first guide rod 4421. The moving blocks 4422 drive the rack to move in the opposite direction, and the rack drives the gear to rotate in the opposite direction, which in turn causes the two rotating shafts 4411 to rotate in the opposite direction, driving the partition 441 to rotate towards the center of the heating tank 421. As the two moving blocks 4422 move closer to each other, the partition 441 gradually closes the heating tank 421 until the two partitions 441 abut against each other, the heating tank 421 is completely closed, and the moving blocks 4422 stop moving. At this time, it can effectively prevent the heat loss in the heat insulation box 41. Through the guiding effect of the first guide rod 4421 on the moving blocks 4422, combined with the rigid transmission of the gear and rack transmission assembly 4423, it is ensured that the linear motion of the moving blocks 4422 can be converted into the rotational motion of the partition 441, thereby realizing the smooth and controllable opening and closing process of the two partitions 441.

[0048] Reference Figure 9 and Figure 10 As shown: the opening and closing drive structure 442 also includes a linear driver 4424 and two drive plates 4425; the linear driver 4424 is disposed between the two moving blocks 4422; both drive plates 4425 are connected to the output end of the linear driver 4424, and the two drive plates 4425 are respectively hinged to the two moving blocks 4422.

[0049] When the heating tank 421 needs to be opened, the output end of the linear actuator 4424 extends outward, pushing the two drive plates 4425 to move. Since the two drive plates 4425 are respectively hinged to the two moving blocks 4422, and the moving blocks 4422 are restricted by the first guide rod 4421 to slide only in the horizontal direction, the two drive plates 4425, under the thrust of the linear actuator 4424, respectively drive the two moving blocks 4422 to slide away from each other along the first guide rod 4421. The linear motion of the moving blocks 4422, through the gear and rack transmission assembly 4423, causes the two rotating shafts 4411 to rotate in opposite directions, thereby driving the partitions 441 on both sides of the heating tank 421 to move away from the heating tank. When the heating tank 421 needs to be closed, the output end of the linear actuator 4424 retracts inward, pulling the two drive plates 4425 to move. The two drive plates 4425 drive the two moving blocks 4422 to slide along the first guide rod 4421 towards each other through the hinge point. The moving blocks 4422 drive the rack to move in the opposite direction, causing the gear and the rotating shaft 4411 to rotate in the opposite direction. The partition 441 rotates towards the center of the heating tank 421. The linear actuator 4424 and the two drive plates 4425 synchronously drive the two moving blocks 4422, making the two moving blocks 4422 move synchronously, thereby ensuring the consistency of the actions of the two partitions 441.

[0050] Reference Figure 3 , Figure 5 and Figure 8 As shown: The heating assembly 43 includes multiple heating elements 431, an inlet pipe 432 and an outlet pipe 433; both ends of the multiple heating elements extend out of the heat insulation box 41; the inlet pipe 432 is connected to the inlet end of the multiple heating elements 431; the outlet pipe 433 is connected to the outlet end of the multiple heating elements 431.

[0051] When the heating structure 4 needs to provide heat to the battery cells, the heat medium in the external waste heat supply device is transported to the inlet end of each heating element 431 through the inlet pipe 432. The heat medium flows inside the heating element 431 and exchanges heat with the heating element 431, causing the temperature of the heating element 431 to rise, thereby heating the air inside the insulation box 41. Due to the heat insulation effect of the insulation box 41, the heat is not easily lost to the outside and can accumulate inside the insulation box 41 to form a stable high-temperature environment. When the heating structure 4 does not need to provide heat, the waste heat supply device stops supplying heat medium to the inlet pipe 432. The residual heat medium in the heating element 431 continues to exchange heat with the air inside the insulation box 41 and then flows out through the outlet pipe 433. By evenly distributing multiple heating elements 431 inside the insulation box 41, the heat distribution inside the insulation box 41 can be made more uniform, thereby making the heat radiation transferred to the battery cells more stable and improving the heating flatness effect.

[0052] Reference Figure 4 , Figure 11 and Figure 12 As shown: The receiving and delivering mechanism 5 includes a guide structure 51 and a bidirectional drive structure 52; the guide structure 51 is connected to two heat insulation boxes 41 and is used to limit the movement direction of the heat insulation boxes 41; the bidirectional drive structure 52 is used to drive the two heat insulation boxes 41 to move on the guide structure 51.

[0053] Specifically, the guide structure 51 includes a horizontal plate 511, at least two second guide rods 512, and two connecting blocks 513. The two second guide rods 512 are parallel to each other, and both ends of the second guide rods 512 are connected to the horizontal plate 511. The two connecting blocks 513 are respectively connected to the bottom of the two heat insulation boxes 41, and the connecting blocks 513 are slidably connected to the two second guide rods 512. The bidirectional drive structure 52 includes two sliders 521 and a bidirectional slide table 522. Two drive rods 523 are rotatably connected to the sliders 521, and the two drive rods 523 are respectively rotatably connected to the two connecting blocks 513. The bidirectional slide table 522 is used to drive the two sliders 521 to move in opposite directions.

[0054] When it is necessary to drive the two insulation boxes 41 away from each other, the bidirectional slide table 522 is activated, driving the two sliders 521 to move in opposite directions. The movement of the sliders 521 causes the angle of the two drive rods 523 rotatably connected to them to change. The drive rods 523 are rotatably connected to the connecting block 513, pushing the two connecting blocks 513 to slide along the second guide rod 512 in a direction away from each other. Since the connecting block 513 is connected to the bottom of the insulation box 41, the sliding of the connecting block 513 drives the two insulation boxes 41 to move away from each other synchronously. Under the guidance of the second guide rod 512, the insulation box 41 can maintain a stable direction of movement and will not deviate. When it is necessary to drive the two insulation boxes 41 closer to each other, the bidirectional slide table 522 drives the two sliders 521 to move in opposite directions. The slider 521 drives the drive rod 523 to change its angle. The drive rod 523 pulls the two connecting blocks 513 to slide along the second guide rod 512 in a direction that moves closer to each other, thereby driving the two heat insulation boxes 41 to move closer to each other synchronously. Under the constraint of the second guide rod 512, the movement direction is ensured to be accurate, thus realizing the synchronous reverse movement of the two heat insulation boxes 41.

[0055] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A screen printing device for preventing solar cells from bending during cooling, comprising a cooling furnace (1), a furnace belt (2) for horizontally conveying solar cells through the cooling furnace (1), and two leveling mechanisms arranged horizontally in mirror image of the furnace belt (2), characterized in that, The leveling mechanism includes a circulating insulation heat exchanger (3) and a heating mechanism located in the middle of the circulating insulation heat exchanger (3); Multiple perforations (31) are evenly spaced on the circulating insulation tape (3), and the distance between any two adjacent perforations (31) is the same as the distance between two adjacent battery cells during the transportation process; The heating mechanism includes two heating structures (4) and a receiving mechanism (5). The two heating structures (4) are connected end to end and parallel to the movement path of the battery cells. The heating structure (4) includes a heat insulation box (41), a cover plate (42), and a heating component (43). The heat insulation box (41) is connected to the receiving mechanism (5). The cover plate (42) is placed on the upper end of the heat insulation box (41), and a heating groove (421) is provided on the cover plate (42) to connect with the perforation (31). The heating component (43) is placed inside the heat insulation box (41), and the heating component (43) is connected to a waste heat supply device. The heating structure (4) also includes a partition structure (44), which is placed on the cover plate (42). The partition structure (44) is used to control the opening and closing of the heating groove (421). The partition structure (44) includes two partition components (44). 41) and opening and closing drive structure (442); two partitions (441) are respectively set on both sides of the heating tank (421), and the partitions (441) are provided with rotating shafts (4411) that are rotatably connected to the heat insulation box (41); the opening and closing drive structure (442) is connected to the two rotating shafts (4411) and is used to drive the two rotating shafts (4411) to rotate in opposite directions; the receiving and conveying mechanism (5) is connected to the two heating structures (4) and is used to move the two heating structures (4) synchronously in opposite directions; the receiving and conveying mechanism (5) includes a guide structure (51) and a bidirectional drive structure (52); the guide structure (51) is connected to the two heat insulation boxes (41) and is used to limit the direction of movement of the heat insulation box (41); the bidirectional drive structure (52) is used to drive the two heat insulation boxes (41) to move on the guide structure (51); When the two heating structures (4) are in a state of being far apart from each other, they are respectively connected to the two holes (31) and are respectively used to receive and send out the holes (31). When the two heating structures (4) are in a state of being in contact with each other, the holes (31) are transitioned from the front heating structure (4) to the rear heating structure (4).

2. The screen printing equipment for preventing battery cells from bending due to cooling according to claim 1, characterized in that, The length of the heating tank (421) is the same as the length of the perforation (31), and the moving speed of the circulating insulation tape (3) is the same as the moving speed of the insulation box (41).

3. The screen printing equipment for preventing battery cells from bending due to cooling according to claim 1, characterized in that, The length of the heating tank (421) is greater than the length of the perforation (31), and the moving speed of the circulating insulation tape (3) is greater than the moving speed of the insulation box (41).

4. The screen printing equipment for preventing battery cells from bending due to cooling according to claim 1, characterized in that, The opening and closing drive structure (442) includes a first guide rod (4421), two moving blocks (4422) and two gear and rack transmission assemblies (4423). The first guide rod (4421) is set horizontally and perpendicular to the two rotating shafts (4411); Both movable blocks (4422) are slidably mounted on the first guide rod (4421); The two ends of the gear and rack transmission assembly (4423) are connected to the moving block (4422) and the rotating shaft (4411), respectively.

5. The screen printing equipment for preventing battery cells from bending due to cooling according to claim 4, characterized in that, The opening and closing drive structure (442) also includes a linear driver (4424) and two drive boards (4425). The linear actuator (4424) is positioned between the two moving blocks (4422); Both drive boards (4425) are connected to the output of the linear driver (4424), and the two drive boards (4425) are respectively hinged to the two moving blocks (4422).

6. The screen printing equipment for preventing battery cells from bending due to cooling according to claim 1, characterized in that, The heating assembly (43) includes multiple heating elements (431), an inlet pipe (432), and an outlet pipe (433); Both ends of the multiple heating elements (431) extend out of the heat insulation box (41); The inlet pipe (432) is connected to the inlet end of multiple heating elements (431); The outlet pipe (433) is connected to the outlet end of multiple heating elements (431).

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