A solder paste curing oven for battery cell production

Abstract

This application discloses a solder paste curing oven for battery cell production, belonging to the technical field of battery cell production equipment. It includes an oven body, within which are a conveying mechanism for transporting battery cells and an exhaust mechanism for venting exhaust. The conveying mechanism includes several frames fixed within the oven body, and a conveyor belt that moves along the length of the oven body is mounted on the frames. The top surface of the conveyor belt has several evenly distributed adsorption holes. The heat preservation mechanism includes several heating units, each including a heating base and a heating cover plate. The heating cover plate is located between the heating base and the conveyor belt. An air passage is provided within the heating base. The top surface of the heating cover plate has several adsorption grooves communicating with the air passages. These adsorption grooves are spaced apart along the width of the conveyor belt, and their length direction is consistent with the conveying direction of the conveyor belt. The adsorption grooves are located directly below the adsorption holes. This application has the effect of improving the yield of battery cells.

Description

Technical Field

[0001] This application relates to the technical field of battery cell production equipment, and in particular to a solder paste curing oven for battery cell production. Background Technology

[0002] During the production of solar cells, solder paste needs to be applied to the surface of the cells to achieve conductive interconnection and soldering fixation between them. The curing of the solder paste is a key process that determines the conductivity and soldering reliability of the solar cells. Typically, the solar cells with solder paste applied are sent into a curing oven, where the solder paste is heated, melted, cooled, and solidified under precisely controlled temperature conditions.

[0003] In existing technologies, curing ovens typically use conveyor belts as the carrier and transport medium for solar cells. The solar cells are placed directly on the surface of the conveyor belt, and the solar cells are driven sequentially through the preheating zone, the heat preservation and curing zone, and the cooling zone by the friction between the conveyor belt and the solar cells.

[0004] However, during the conveying process, due to the influence of the hot air circulation in the curing oven and the mechanical vibration generated during equipment operation, the solar cells are prone to planar displacement or deflection on the conveyor belt. This displacement causes the solder paste to deviate from its preset soldering position during curing, resulting in defects such as incomplete soldering, uneven solder paste thickness, and solder joint misalignment, severely affecting the conductivity and yield of the solar cells. Summary of the Invention

[0005] To address the issue of low yield caused by easy deviation during battery cell transport, this application provides a solder paste curing oven for battery cell production.

[0006] This application provides a solder paste curing oven for battery cell production, which adopts the following technical solution: A solder paste curing oven for battery cell production includes an oven body. Inside the oven body are a conveying mechanism for transporting battery cells and an exhaust mechanism for venting exhaust. The conveying mechanism includes several frames fixed inside the oven body. A conveyor belt that moves along the length of the oven body is mounted on each frame. A heat preservation mechanism and a cooling mechanism are sequentially arranged on each frame along the conveying direction of the conveyor belt. Several evenly distributed adsorption holes are formed on the top surface of the conveyor belt. The heat preservation mechanism includes several heating units, which are arranged on the frames along the length of the oven body. Each heating unit includes a heating base and a heating cover plate. The heating cover plate is located between the heating base and the conveyor belt. An air passage is provided inside the heating base. Several adsorption grooves communicating with the air passages are formed on the top surface of the heating cover plate. The adsorption grooves are spaced apart along the width of the conveyor belt, and the length direction of the adsorption grooves is consistent with the conveying direction of the conveyor belt. The adsorption grooves are located directly below the adsorption holes.

[0007] By adopting the above technical solution, the battery cells are placed on the conveyor belt. The negative pressure in the air channel of the heating base is transferred to the adsorption holes through the adsorption groove, forming a uniform adsorption force between the bottom surface of the battery cell and the conveyor belt. This stably adsorbs the battery cell onto the surface of the conveyor belt, achieving negative pressure limiting throughout the entire conveying process. The adsorption groove is spaced along the width of the conveyor belt and its length is consistent with the conveying direction, ensuring that the adsorption force is continuously and uniformly distributed along the conveying direction. This avoids excessive local stress that could cause the battery cell to break or insufficient adsorption force that could cause displacement, thus ensuring the positional accuracy and consistency of the solder paste curing. Furthermore, the adsorption groove is directly integrated into the top surface of the heating cover plate of the heating unit, and the air channel is built into the heating base, eliminating the need for an additional independent adsorption device. The structure is compact and does not increase the space occupied by the equipment. The negative pressure adsorption makes the battery cell fit tightly against the surface of the conveyor belt, reducing the air gap between the battery cell and the conveyor belt. This facilitates the more efficient conduction of heat generated by the heating unit to the battery cell through the conveyor belt, improving heat conduction efficiency and temperature uniformity, thereby comprehensively ensuring the solder paste curing quality and the production yield of the battery cells.

[0008] Preferably, the heating unit further includes a heating side plate mounted on the frame, and a plurality of thermocouples are fixedly mounted on the heating side plate, the thermocouples being located inside the heating base.

[0009] By adopting the above technical solution, the thermocouple can monitor the temperature inside the heating base in real time and feed the temperature signal back to the control system. This allows the control system to accurately adjust the temperature of each heating unit according to the preset heating curve, ensuring the independent controllability and stability of the temperature of each heating unit. This enables precise temperature control of the battery cells as they pass through different temperature zones along the conveying direction during the conveying process, ensuring the temperature accuracy of each stage of preheating, heat preservation, and reflow during the solder paste curing process, and further improving the consistency of solder paste curing quality.

[0010] Preferably, the top of the frame is covered with an insulation cover, which is positioned above the conveyor belt, and the bottom surface of the insulation cover abuts against the top surface of the frame.

[0011] By adopting the above technical solution, the heat insulation cover forms a closed heat insulation chamber above the conveyor belt, which effectively reduces the upward loss of heat generated by the heating unit, improves the thermal energy utilization rate, and reduces equipment energy consumption. At the same time, the heat insulation cover isolates the battery cells on the conveyor belt from the hot and cold airflow at the top of the furnace, reduces the interference of the hot air circulation in the furnace on the surface temperature uniformity of the battery cells, and ensures the stability and consistency of the battery cells being heated during the solder paste curing process.

[0012] Preferably, the furnace body is provided with two horizontally arranged mounting rods, which are respectively located at both ends of the insulation cover. The bottom surface of the mounting rods is fixedly connected to the top surface of the insulation cover. Two lifting electric cylinders are arranged above the mounting rods. The lifting electric cylinders are fixed to the inner top surface of the furnace body, and the piston rod end of the lifting electric cylinder is fixedly connected to the mounting rod.

[0013] By adopting the above technical solution, when the insulation mechanism needs maintenance or repair, the lifting cylinder lifts the insulation cover upwards via the mounting rod, separating the insulation cover from the frame. This provides operators with ample maintenance space, eliminating the need for manual disassembly or handling of the heavy insulation cover, reducing maintenance difficulty and labor intensity, and improving the convenience and safety of equipment maintenance.

[0014] Preferably, the cooling mechanism includes a cooling fan assembly and a cooling fin assembly, with the cooling fan assembly located above the conveyor belt and the cooling fin assembly located below the conveyor belt.

[0015] By adopting the above technical solution, when the heated and cured battery cells enter the cooling zone along the conveyor belt, the fan group provides forced air cooling to the battery cells from above, and the fin group provides auxiliary heat dissipation to the conveyor belt and battery cells from below. The simultaneous cooling from above and below achieves rapid and uniform cooling of the battery cells, ensuring rapid solidification of the solder joints after the solder paste is cured. This avoids problems such as coarse solder joint grains caused by slow cooling or thermal stress cracks caused by excessively fast cooling, thereby improving the reliability of the solder joints and the thermal shock resistance of the battery cells.

[0016] Preferably, the exhaust mechanism includes an upper hot air exhaust unit, a solder paste exhaust unit, and a lower adsorption exhaust unit. The upper hot air exhaust unit is used to directly exhaust the hot air from the top of the furnace body. The solder paste exhaust unit is used to treat the exhaust gas generated during the solder paste heating process in the heat preservation cover body. The lower adsorption exhaust unit is used to exhaust the air in the heating base air passage.

[0017] By adopting the above technical solutions, the upper hot air exhaust unit directly exhausts the hot air from the top of the furnace body, avoiding the accumulation of hot air at the top of the furnace body that would lead to uneven temperature distribution inside the furnace and improving the temperature uniformity inside the furnace; the solder paste exhaust unit collects the organic waste gas generated during the solder paste heating process inside the insulation cover and discharges it after combustion and condensation, effectively removing harmful components from the waste gas, improving the workshop production environment, and meeting environmental emission requirements; the lower adsorption exhaust unit exhausts the air in the base air duct, providing a continuous and stable negative pressure source for the adsorption tank, ensuring the normal operation of the adsorption function.

[0018] Preferably, the bottom of the frame is provided with two adjusting slide rails, and adjusting seats are slidably installed on the adjusting slide rails along the length direction of the frame. A tensioning shaft is installed on the adjusting seat, and the conveyor belt is wound around the outer periphery of the tensioning shaft. An adjusting cylinder is installed at the bottom of the frame, and the piston rod end of the adjusting cylinder is fixedly connected to the adjusting seat.

[0019] By adopting the above technical solution, when the conveyor belt becomes loose after long-term operation, the adjusting cylinder drives the adjusting seat to move along the adjusting slide rail, which in turn moves the tensioning shaft to change the tension of the conveyor belt. This achieves automatic adjustment of the conveyor belt tension without manual intervention, ensuring the stable tension of the conveyor belt during long-term operation and avoiding problems such as slippage, deviation, or decreased conveying accuracy caused by the loosening of the conveyor belt.

[0020] Preferably, the adjusting seat includes an adjusting plate, with connecting plates fixed to both sides of the adjusting plate. A clearance groove is provided on the side of the connecting plate. Adjusting blocks are provided at both ends of the tensioning shaft. The adjusting blocks pass through the clearance groove. An mounting block is fixed to the side of the connecting plate. A fine-tuning stud is threaded onto the mounting block. The end of the fine-tuning stud can abut against the side of the adjusting block. An adjusting spring is fixed to the inner wall of the clearance groove away from the fine-tuning stud. The other end of the adjusting spring is fixedly connected to the side of the adjusting block.

[0021] By adopting the above technical solution, when the fine-tuning stud is rotated, the fine-tuning stud pushes the adjusting block to move in the relief groove. The elastic force of the adjusting spring and the thrust of the fine-tuning stud are balanced, which realizes the precise adjustment of the tension shaft position, ensures the fine control of the conveyor belt tension, and at the same time, the elastic buffering effect of the adjusting spring avoids the impact damage to the conveyor belt caused by sudden changes in tension.

[0022] Preferably, support plates are fixed on both sides of the bottom of the frame, and a disassembly shaft is detachably installed between the two support plates. The conveyor belt is wrapped around the outer periphery of the disassembly shaft, and the disassembly shaft is located outside the conveyor belt.

[0023] By adopting the above technical solution, when the conveyor belt needs to be replaced, the operator only needs to remove the disassembly shaft from the support plate to pull the entire conveyor belt out of the frame as a whole. There is no need to disassemble multiple tension rollers or drive rollers one by one, which greatly simplifies the conveyor belt replacement operation, shortens equipment downtime, and reduces maintenance costs and the labor intensity of operators.

[0024] Preferably, disassembly blocks are installed at both ends of the disassembly shaft, and the side of the support plate is provided with an installation groove for inserting the disassembly blocks. A locking plate is fixed to the side of the support plate away from the conveyor belt by bolts, and the side of the locking plate abuts against the disassembly blocks.

[0025] By adopting the above technical solution, when it is necessary to fix the disassembly shaft, the disassembly block is inserted into the mounting groove, and then the locking plate is fixed to the side of the support plate with bolts. The locking plate confines the disassembly block within the mounting groove, preventing the disassembly shaft from coming out of the mounting groove due to vibration during equipment operation. When disassembly is required, simply loosen the bolts and remove the locking plate to take the disassembly shaft out of the mounting groove. This achieves quick installation and disassembly of the disassembly shaft. At the same time, the bolt connection method is reliable and has a strong load-bearing capacity, ensuring the stability of the disassembly shaft during equipment operation.

[0026] In summary, this application includes at least one of the following beneficial technical effects: The battery cells are placed on the conveyor belt. The negative pressure in the air duct of the heating base is transferred to the adsorption holes through the adsorption grooves, forming a uniform adsorption force between the bottom surface of the battery cell and the conveyor belt. This stably adsorbs the battery cell onto the surface of the conveyor belt, achieving negative pressure limiting throughout the battery cell conveying process. The adsorption grooves are spaced along the width of the conveyor belt and are consistent with the conveying direction in the length direction, ensuring that the adsorption force is continuously and evenly distributed along the conveying direction. This avoids excessive local stress that could cause the battery cell to break or insufficient adsorption force that could cause displacement, ensuring the positional accuracy and consistency of the solder paste curing. Furthermore, the adsorption grooves are directly integrated into the top surface of the heating cover plate of the heating unit, and the air ducts are built into the heating base, eliminating the need for an additional independent adsorption device. The structure is compact and does not increase the space occupied by the equipment. The negative pressure adsorption makes the battery cell fit tightly against the surface of the conveyor belt, reducing the air gap between the battery cell and the conveyor belt. This facilitates the more efficient conduction of heat generated by the heating unit to the battery cell through the conveyor belt, improving heat conduction efficiency and temperature uniformity, thereby comprehensively ensuring the solder paste curing quality and the production yield of the battery cell. When the conveyor belt becomes loose after long-term operation, the adjusting cylinder drives the adjusting seat to move along the adjusting slide rail, which in turn moves the tensioning shaft to change the tension of the conveyor belt. This achieves automatic adjustment of the conveyor belt tension without manual intervention, ensuring the stable tension of the conveyor belt during long-term operation and avoiding problems such as slippage, deviation, or decreased conveying accuracy caused by the loosening of the conveyor belt. When the fine-tuning stud is rotated, it pushes the adjusting block to move within the clearance groove. The elastic force of the adjusting spring and the thrust of the fine-tuning stud are balanced, achieving precise adjustment of the tension shaft position and ensuring fine control of the conveyor belt tension. At the same time, the elastic buffering effect of the adjusting spring avoids impact damage to the conveyor belt caused by sudden changes in tension. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of a solder paste curing oven for battery cell production according to an embodiment of this application.

[0028] Figure 2This is a schematic diagram of the internal structure of the furnace body in the solder paste curing oven for battery cell production according to an embodiment of this application.

[0029] Figure 3 This is a schematic diagram of the conveying mechanism in a solder paste curing oven for battery cell production according to an embodiment of this application.

[0030] Figure 4 This is a schematic diagram of the heating unit in a solder paste curing oven for battery cell production according to an embodiment of this application.

[0031] Figure 5 This is a schematic diagram of the heating cover plate in a solder paste curing oven for battery cell production according to an embodiment of this application.

[0032] Figure 6 This is a schematic diagram of the heating base in a solder paste curing oven for battery cell production according to an embodiment of this application.

[0033] Figure 7 This is a schematic diagram of the cooling mechanism in a solder paste curing oven for battery cell production according to an embodiment of this application.

[0034] Figure 8 This is a schematic diagram of the tension roller in a solder paste curing oven for battery cell production according to an embodiment of this application.

[0035] Figure 9 yes Figure 8 Enlarged diagram of point A in the middle.

[0036] Reference numerals: 1. Furnace body; 11. Feed inlet; 12. Discharge outlet; 2. Conveying mechanism; 21. Frame; 22. Conveyor belt; 221. Adsorption hole; 3. Insulation mechanism; 31. Insulation cover; 32. Mounting rod; 33. Lifting cylinder; 4. Heating unit; 41. Heating base; 411. Air duct; 42. Heating cover plate; 421. Adsorption tank; 43. Heating side plate; 44. Thermocouple; 5. Exhaust mechanism; 51. Upper hot air exhaust unit; 52. Solder paste exhaust unit; 53. Lower adsorption exhaust unit; 6. Cooling mechanism; 61. Cooling fan assembly; 611. Axial flow fan; 62. Cooling fin assembly; 621. Metal fins; 7. Adjusting seat; 71. Adjusting plate; 72. Connecting plate; 73. Clearance groove; 74. Adjusting slide rail; 75. Tensioning shaft; 76. Adjusting block; 77. Adjusting cylinder; 8. Mounting block; 81. Fine-tuning stud; 82. Adjusting spring; 9. Removal shaft; 91. Removal block; 92. Support plate; 93. Mounting groove; 94. Locking plate. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0038] This application discloses a solder paste curing oven for battery cell production.

[0039] Reference Figure 1 and Figure 2 The solder paste curing oven for battery cell production includes an oven body 1, which is equipped with a conveying mechanism 2, an exhaust mechanism 5, a heat preservation mechanism 3, and a cooling mechanism 6.

[0040] Reference Figure 1 , Figure 3 and Figure 4 The conveying mechanism 2 includes two frames 21 fixed inside the furnace body 1. A conveyor belt 22 that moves along the length of the furnace body 1 is mounted on the frames 21. The top surface of the conveyor belt 22 has several evenly distributed adsorption holes 221. A feed inlet 11 and a discharge outlet 12 are respectively provided on both sides of the furnace body 1, and the feed inlet 11 and the discharge outlet 12 are located at the two ends of the conveyor belt 22.

[0041] The battery cells with solder paste applied are placed onto the conveyor belt 22 through the feed port 11. The battery cells on the conveyor belt 22 pass through the heat preservation mechanism 3 and the cooling mechanism 6 in sequence. The battery cells are gradually heated and kept warm in the heat preservation mechanism 3, and then pass through the cooling mechanism 6 to achieve the heating and curing of the solder paste. Finally, they are transported to the next station through the discharge port 12.

[0042] Reference Figure 3 and Figure 4 The heat preservation mechanism 3 includes a heat preservation cover 31 and several heating units 4. The heat preservation cover 31 is placed above the conveyor belt 22, and the bottom surface of the heat preservation cover 31 abuts against the top surface of the frame 21. Several heating units 4 are arranged sequentially on the frame 21 along the length of the furnace body 1, and the heating units 4 are located below the conveyor belt 22.

[0043] Reference Figure 5 and Figure 6 The heating unit 4 includes a heating base 41, a heating cover plate 42, and a heating side plate 43. The heating cover plate 42 is located between the heating base 41 and the conveyor belt 22. Several thermocouples 44 are fixed on the heating side plate 43. The sensing ends of the thermocouples 44 extend into the heating base 41 to monitor the temperature inside the heating base 41 in real time and feed the temperature signal back to the control system. This allows the control system to accurately adjust the temperature of each heating unit 4 according to the preset heating curve, ensuring the independent controllability and stability of the temperature of each heating unit 4 and ensuring the temperature accuracy of each stage of the solder paste curing process, including preheating, heat preservation, and reflow.

[0044] Reference Figure 5 and Figure 6The heating base 41 is provided with an air passage 411. The top surface of the heating cover plate 42 is provided with several adsorption grooves 421 that are connected to the air passages 411. The several adsorption grooves 421 are spaced apart along the width direction of the conveyor belt 22. The length direction of the adsorption grooves 421 is consistent with the conveying direction of the conveyor belt 22, and the adsorption grooves 421 are located directly below the adsorption holes 221.

[0045] The negative pressure in the air passage 411 is transmitted to the adsorption holes 221 on the conveyor belt 22 through the adsorption tank 421, forming a uniform adsorption force between the bottom surface of the battery cell and the conveyor belt 22, stably adsorbing the battery cell onto the surface of the conveyor belt 22. This achieves negative pressure limiting for the entire conveying process of the battery cell. The adsorption tank 421 is spaced along the width direction of the conveyor belt 22 and its length direction is consistent with the conveying direction, so that the adsorption force is continuously and uniformly distributed along the conveying direction. This avoids excessive local force that could cause the battery cell to break or displacement due to insufficient adsorption force, and ensures the positional accuracy and consistency of the solder paste curing of the battery cell.

[0046] Reference Figure 1 and Figure 2 The exhaust system 5 includes an upper hot air exhaust unit 51, a solder paste exhaust unit 52, and a lower adsorption exhaust unit 53. The upper hot air exhaust unit 51 directly exhausts hot air from the top of the furnace body 1, preventing hot air accumulation at the top of the furnace body 1 and thus avoiding uneven temperature distribution within the furnace, thereby improving temperature uniformity. The solder paste exhaust unit 52 collects the exhaust gas generated during the solder paste heating process within the insulation cover 31, and discharges it after combustion and condensation, effectively removing harmful components from the exhaust gas, improving the workshop production environment, and meeting environmental emission requirements. The lower adsorption exhaust unit 53 exhausts air from the air passage 411, providing a continuous and stable negative pressure source for the adsorption tank 421, ensuring the normal operation of the adsorption function.

[0047] Reference Figure 1 and Figure 2 The furnace body 1 has two horizontally positioned mounting rods 32, located at both ends of the insulation cover 31. The bottom surfaces of the mounting rods 32 are fixedly connected to both insulation covers 31. Two lifting cylinders 33 are positioned directly above the mounting rods 32 and fixed to the inner top surface of the furnace body 1. The bottom ends of the piston rods of the lifting cylinders 33 are fixedly connected to the mounting rods 32.

[0048] When maintenance is required on the insulation mechanism 3, the lifting cylinder 33 is activated. The piston rod of the lifting cylinder 33 drives the insulation cover 31 to move upward through the mounting rod 32, so that the staff can inspect and maintain it.

[0049] Reference Figure 7The cooling mechanism 6 includes a cooling fan assembly 61 and a cooling fin assembly 62. The cooling fan assembly 61 is located above the conveyor belt 22, and the cooling fin assembly 62 is located below the conveyor belt 22. The cooling fan assembly 61 includes multiple axial fans 611 arranged side by side along the width of the conveyor belt 22 for forced air cooling of the battery cells from above. The cooling fin assembly 62 includes multiple parallel metal fins 621 fixed to the bottom of the frame 21 for auxiliary heat dissipation of the conveyor belt 22 and the battery cells from below.

[0050] The simultaneous cooling from top and bottom enables rapid and uniform cooling of the solar cells, ensuring rapid solidification of the solder joints after the solder paste has cured. This avoids problems such as coarse solder joint grains caused by slow cooling or thermal stress cracks caused by excessively fast cooling, thereby improving the reliability of the solder joints and the thermal shock resistance of the solar cells.

[0051] Reference Figure 8 and Figure 9 The bottom of the frame 21 is equipped with a tensioning shaft 75 and a disassembly shaft 9. The conveyor belt 22 passes around the disassembly shaft 9 and the tensioning shaft 75 in sequence. The tensioning shaft 75 is located inside the conveyor belt 22, and the disassembly shaft 9 is located outside the conveyor belt 22. The bottom of the frame 21 is equipped with two adjusting slide rails 74. Adjusting seats 7 are slidably mounted on the adjusting slide rails 74 along the length of the frame 21. The adjusting assembly includes an adjusting plate 71, with connecting plates 72 fixed to both sides of the adjusting plate 71. A clearance groove 73 is provided on the side of the connecting plate 72. Adjusting blocks 76 are provided at both ends of the tensioning shaft 75, passing through the clearance groove 73. An adjusting cylinder 77 is installed at the bottom of the frame 21, with the piston rod end of the adjusting cylinder 77 fixedly connected to the adjusting plate 71.

[0052] When the conveyor belt 22 becomes loose after long-term operation, the adjusting cylinder 77 drives the adjusting seat 7 to move along the adjusting slide rail 74, which in turn moves the tensioning shaft 75 to change the tension of the conveyor belt 22. This achieves automatic adjustment of the tension of the conveyor belt 22 without manual intervention, ensuring the stable tension of the conveyor belt 22 during long-term operation and avoiding slippage, deviation, or decreased conveying accuracy caused by the loosening of the conveyor belt 22.

[0053] Reference Figure 8 and Figure 9 A mounting block 8 is fixed to the side of the connecting plate 72. A fine-tuning stud 81 is threaded onto the mounting block 8. The end of the fine-tuning stud 81 can abut against the side of the adjusting block 76. An adjusting spring 82 is fixed to the inner wall of the clearance groove 73 away from the fine-tuning stud 81. The other end of the adjusting spring 82 is fixedly connected to the side of the adjusting block 76.

[0054] When it is necessary to adjust the position of both ends of the tension shaft 75, the fine-tuning studs 81 at both ends can be rotated to allow the adjusting blocks 76 at both ends of the tension shaft 75 to move independently, thereby accurately calibrating the level of the tension shaft 75 and ensuring that the tension shaft 75 is perpendicular to the running direction of the conveyor belt 22, thus avoiding the problem of the conveyor belt 22 running off-center due to the tilt of the tension shaft 75.

[0055] Reference Figure 8 and Figure 9 Support plates 92 are fixed to both sides of the bottom of the frame 21. Mounting grooves 93 are formed on the side of the support plates 92 near the feed inlet 11. Disassembly blocks 91 are installed at both ends of the disassembly shaft 9, and the disassembly blocks 91 are inserted into the mounting grooves 93. A locking plate 94 is bolted to the side of the support plate 92 near the feed inlet 11, and the side of the locking plate 94 abuts against the disassembly blocks 91. When the conveyor belt 22 needs to be replaced, simply remove the locking plate 94, remove the disassembly shaft 9, and then remove the conveyor belt 22 from one side of the frame 21 to replace it. This greatly simplifies the replacement operation of the conveyor belt 22, shortens equipment downtime, and reduces maintenance costs and the labor intensity of operators.

[0056] The implementation principle of the solder paste curing oven for battery cell production in this application embodiment is as follows: After the battery cell has been coated with solder paste, it is placed on the conveyor belt 22 through the feed port 11. At the moment it enters the conveyor belt 22, the negative pressure in the adsorption tank 421 is transmitted to the bottom surface of the battery cell through the adsorption hole 221, and the battery cell is stably adsorbed on the surface of the conveyor belt 22. Under the action of negative pressure adsorption, the battery cell is limited to the predetermined position of the conveyor belt 22 throughout the entire conveying process, avoiding the displacement caused by hot air flow or equipment vibration.

[0057] Under the heating action of each heating unit 4, the solder paste on the surface of the battery cell undergoes solvent evaporation, flux activation, and solder melting and wetting. Simultaneously, the solder paste exhaust unit 52 continuously extracts and combusts and condenses the organic waste gas generated within the insulation cover 31, ensuring a clean furnace environment. After heating and curing, the battery cell enters the cooling zone via the conveyor belt 22. The cooling fan assembly 61 provides forced air cooling from above, while the heat dissipation fin assembly 62 provides auxiliary heat dissipation from below, allowing the battery cell and solder paste joints to cool rapidly and uniformly to room temperature, completing the curing and setting of the solder paste.

[0058] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A solder paste curing oven for battery cell production, comprising an oven body (1), wherein a conveying mechanism (2) for conveying battery cells and an exhaust mechanism (5) for exhaust are provided inside the oven body (1), the conveying mechanism (2) comprising a plurality of frames (21) fixed inside the oven body (1), a conveyor belt (22) moving along the length of the oven body (1) is provided on the frames (21), and a heat preservation mechanism (3) and a cooling mechanism (6) are sequentially provided on the frames (21) along the conveying direction of the conveyor belt (22), characterized in that: The top surface of the conveyor belt (22) is provided with a plurality of uniformly distributed adsorption holes (221). The heat preservation mechanism (3) includes a plurality of heating units (4). The plurality of heating units (4) are arranged on the frame (21) along the length direction of the furnace body (1). The heating unit (4) includes a heating base (41) and a heating cover plate (42). The heating cover plate (42) is located between the heating base (41) and the conveyor belt (22). An air passage (411) is provided in the heating base (41). The top surface of the heating cover plate (42) is provided with a plurality of adsorption grooves (421) that are connected to the air passages (411). The plurality of adsorption grooves (421) are spaced apart along the width direction of the conveyor belt (22). The length direction of the adsorption grooves (421) is consistent with the conveying direction of the conveyor belt (22). The adsorption grooves (421) are located directly below the adsorption holes (221).

2. The solder paste curing oven for battery cell production according to claim 1, characterized in that: The heating unit (4) also includes a heating side plate (43) installed on the frame (21), and a plurality of thermocouples (44) are fixedly installed on the heating side plate (43), and the thermocouples (44) are located inside the heating base (41).

3. The solder paste curing oven for battery cell production according to claim 1, characterized in that: The top of the frame (21) is covered with a heat-insulating cover (31), which covers the conveyor belt (22) and the bottom surface of the heat-insulating cover (31) abuts against the top surface of the frame (21).

4. The solder paste curing oven for battery cell production according to claim 3, characterized in that: The furnace body (1) is provided with two horizontally arranged mounting rods (32), which are located at both ends of the heat insulation cover (31). The bottom surface of the mounting rod (32) is fixedly connected to the top surface of the heat insulation cover (31). Two lifting electric cylinders (33) are arranged above the mounting rods (32). The lifting electric cylinders (33) are fixed to the inner top surface of the furnace body (1), and the piston rod end of the lifting electric cylinder (33) is fixedly connected to the mounting rod (32).

5. A solder paste curing oven for battery cell production according to claim 1, characterized in that: The cooling mechanism (6) includes a cooling fan assembly (61) and a cooling fin assembly (62). The cooling fan assembly (61) is located above the conveyor belt (22), and the cooling fin assembly (62) is located below the conveyor belt (22).

6. A solder paste curing oven for battery cell production according to claim 4, characterized in that: The exhaust mechanism (5) includes an upper hot air exhaust unit (51), a solder paste exhaust unit (52), and a lower adsorption exhaust unit (53). The upper hot air exhaust unit (51) is used to directly exhaust the hot air at the top of the furnace body (1). The solder paste exhaust unit (52) is used to treat the exhaust gas generated during the solder paste heating process in the heat preservation cover (31). The lower adsorption exhaust unit (53) is used to exhaust the air in the air passage (411) of the heating base (41).

7. A solder paste curing oven for battery cell production according to claim 1, characterized in that: The bottom of the frame (21) is provided with two adjusting slide rails (74). An adjusting seat (7) is slidably installed on the adjusting slide rails (74) along the length direction of the frame (21). A tensioning shaft (75) is installed on the adjusting seat (7). The conveyor belt (22) is wound around the outer periphery of the tensioning shaft (75). An adjusting cylinder (77) is installed at the bottom of the frame (21). The piston rod end of the adjusting cylinder (77) is fixedly connected to the adjusting seat (7).

8. A solder paste curing oven for battery cell production according to claim 7, characterized in that: The adjusting seat (7) includes an adjusting plate (71), with connecting plates (72) fixed on both sides of the adjusting plate (71). A clearance groove (73) is provided on the side of the connecting plate (72). Adjusting blocks (76) are provided at both ends of the tensioning shaft (75). The adjusting blocks (76) pass through the clearance groove (73). An mounting block (8) is fixed on the side of the connecting plate (72). A fine-tuning stud (81) is threaded onto the mounting block (8). The end of the fine-tuning stud (81) can abut against the side of the adjusting block (76). An adjusting spring (82) is fixed on the inner wall of the clearance groove (73) away from the fine-tuning stud (81). The other end of the adjusting spring (82) is fixedly connected to the side of the adjusting block (76).

9. A solder paste curing oven for battery cell production according to claim 1, characterized in that: Support plates (92) are fixed on both sides of the bottom of the frame (21). A disassembly shaft (9) is detachably installed between the two support plates (92). The conveyor belt (22) is wrapped around the outer periphery of the disassembly shaft (9). The disassembly shaft (9) is located outside the conveyor belt (22).

10. A solder paste curing oven for battery cell production according to claim 9, characterized in that: Disassembly blocks (91) are installed at both ends of the disassembly shaft (9). The side of the support plate (92) is provided with an installation groove (93) for inserting the disassembly block (91). A locking plate (94) is fixed to the side of the support plate (92) away from the conveyor belt (22) by bolts. The side of the locking plate (94) abuts against the disassembly block (91).

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