Pole piece production baking device

Abstract

The utility model relates to a pole piece production baking device, and relates to the technical field of battery manufacturing, in order to solve the problem that a pole piece is prone to cracking during drying, the pole piece production baking device comprises a rack, a conveying mechanism used for conveying a pole piece carrier is arranged on the rack, a box body is arranged on the rack, and a pole piece inlet and a pole piece outlet are formed in the two ends of the box body respectively; a drying mechanism and a spraying mechanism are arranged in the box body, the spraying mechanism is arranged at the front end of the drying mechanism, the spraying mechanism comprises a spraying pipe, a booster pump, a liquid container and an atomizing nozzle, the liquid container is arranged outside the box body, the input end of the booster pump is communicated to the liquid container, and the atomizing nozzle is arranged on the spraying pipe. The output end of the booster pump is communicated to the spraying pipe, the spraying pipe is arranged in the box body, the atomizing nozzle is communicated to the spraying pipe, and the atomizing nozzle is arranged towards the direction of the pole piece carrier. The method has the advantages that the stress concentration phenomenon caused by uneven slurry distribution is reduced, and the cracking risk caused by rapid drying is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of battery manufacturing, in particular to an electrode tab production baking device. BACKGROUND

[0002] In the manufacturing process of battery electrode tabs, coating and drying are two crucial links, which directly determine the final quality and performance of the electrode tabs; first, coating is to uniformly coat the carefully prepared slurry on the metal foil to form a thin film, which is the basic structure of the battery electrode tab, and this process requires high precision and uniformity to ensure that the battery can stably release and store electric energy during operation, and the subsequent drying step is to quickly volatilize the solvent in the slurry by heating to solidify the film and thus shape a solid electrode tab.

[0003] However, in the initial stage of electrode tab coating, especially when starting coating for the first time or restarting after a production gap, the humidity in the drying device (such as an oven) is often significantly lower than that during continuous production, and this change in humidity causes the water loss rate of the electrode tab to accelerate during the drying process, especially in the start-up stage, the slurry on the surface of the electrode tab has not been completely uniformly spread and penetrated, and stress concentration occurs due to rapid drying, which in turn causes cracking on the surface of the electrode tab, not only affecting the appearance of the battery, but more importantly, it may weaken the structural integrity of the electrode tab, reducing its stability and reliability during use, thereby threatening the overall performance of the battery, and thus needs to be improved. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the problem of cracking of electrode tabs during drying, the application provides an electrode tab production baking device.

[0005] The electrode tab production baking device provided by the application adopts the following technical scheme:

[0006] An electrode tab production baking device, comprising a rack, a transmission mechanism for transmitting an electrode tab carrier is arranged on the rack, a box body is arranged on the rack, an electrode tab inlet and an electrode tab outlet are respectively formed at both ends of the box body, a drying mechanism and a spraying mechanism are arranged in the box body, the spraying mechanism is arranged at the front end of the drying mechanism, the spraying mechanism comprises a spraying pipe, a booster pump, a liquid container and an atomizing nozzle, the liquid container is arranged outside the box body, the input end of the booster pump is connected to the liquid container, the output end of the booster pump is connected to the spraying pipe, the spraying pipe is arranged in the box body, the atomizing nozzle is connected to the spraying pipe, and the atomizing nozzle is arranged towards the direction of the electrode tab carrier.

[0007] Due to the stress concentration caused by the rapid drying of the slurry on the surface of the pole piece during the initial coating stage, the surface of the pole piece is prone to cracking, which not only affects the appearance of the battery, but more importantly, may weaken the structural integrity of the pole piece, reduce its stability and reliability during use, and thus threaten the overall performance of the battery; by adopting the above technical solution, the transmission mechanism is installed on the rack, the drying mechanism and the spraying mechanism are installed in the box, the spraying mechanism is composed of a spraying pipe, a booster pump, a liquid container and an atomizing nozzle;

[0008] After the pole piece is coated, the slurry is evenly coated on the pole piece. After the coating is completed, the pole piece carrier is sent into the box through the transmission mechanism. Before entering the drying mechanism, the pole piece carrier first passes through the spraying mechanism. The liquid (which may be water or other solvents) in the liquid container is pressurized by the booster pump and then sent into the spraying pipe. The liquid in the spraying pipe is atomized into tiny droplets by the atomizing nozzle and sprayed evenly on the pole piece carrier and the surface of the pole piece. After being treated by the spraying mechanism, the pole piece carrier enters the drying mechanism to heat and dry the pole piece. After drying is completed, the pole piece carrier is sent out of the box through the pole piece outlet. The rack, the box, the spraying mechanism and the like are provided to further evenly spread and penetrate the slurry on the surface of the pole piece, reduce the stress concentration phenomenon caused by uneven distribution of the slurry, and slow down the drying speed of the pole piece before entering the drying mechanism, giving the slurry more time for natural spreading and penetration, thereby reducing the risk of cracking caused by rapid drying, improving the overall quality of the pole piece, and enhancing the performance of the battery.

[0009] Optionally, the transmission mechanism includes two transmission belts, and the two transmission belts are arranged opposite to each other on the rack and are arranged from the box pole piece inlet to the box pole piece outlet.

[0010] By adopting the above technical solution, the transmission mechanism includes two transmission belts. The double transmission means that two groups of pole piece carriers can be processed at the same time through the transmission mechanism, which significantly improves the production efficiency, especially in large-scale production environment, which can greatly shorten the production cycle and meet the rapid demand of the market for battery products.

[0011] Optionally, the number of atomizing nozzles is multiple groups, and the multiple groups of atomizing nozzles are arranged along the width direction of the rack and are distributed above the two transmission belts.

[0012] By adopting the above technical solution, the number of atomizing nozzles is multiple groups. Through the arrangement of the number of atomizing nozzles, the multiple groups of atomizing nozzles ensure that the slurry at each position of the pole piece carrier can be evenly sprayed during the transmission process, which helps to further improve the uniformity of the slurry and reduce the stress concentration phenomenon caused by uneven spraying, thereby further reducing the risk of pole piece cracking.

[0013] Optionally, the front end of any of the atomizing nozzles is provided with a hinged seat for adjusting the nozzle angle.

[0014] By adopting the above technical scheme, the hinged seat is installed at the front end of the atomizing nozzle; through the arrangement of the hinged seat, the spraying effect is optimized, the spraying angle of the atomizing nozzle can be accurately adjusted, it is ensured that the sprayed liquid can accurately cover each position of the pole piece carrier and the pole piece surface, which helps to improve the accuracy of spraying, reduce the waste of liquid, and ensure that the pole piece is uniformly sprayed.

[0015] Optionally, a support frame for supporting the spraying pipe is arranged in the box body, and the support frame is connected in the box body.

[0016] By adopting the above technical scheme, the spraying pipe is installed in the box body through the support frame; through the arrangement of the support frame, the support frame provides stable support for the spraying pipe, ensuring the stability and positional accuracy of the spraying pipe in the box body, which helps to prevent the spraying pipe from being displaced or deformed due to vibration or external force, thereby ensuring the uniformity and stability of the sprayed liquid.

[0017] Optionally, the drying mechanism comprises two groups of heating resistance pipes, the two groups of heating resistance pipes are arranged on both sides of the transmission belt, and any group of the heating resistance pipes is arranged from the pole piece inlet of the box body to the direction of the pole piece outlet of the box body.

[0018] By adopting the above technical scheme, the drying mechanism comprises two groups of heating resistance pipes; through the arrangement of the two groups of heating resistance pipes, the two groups of heating resistance pipes work simultaneously, which can rapidly increase the temperature of the drying area, accelerate the evaporation and drying process of the water on the surface of the pole piece, and help to shorten the drying time and improve the production efficiency.

[0019] Optionally, the drying mechanism further comprises a heating fan, the heating fan is arranged on the box body, and the heating fan is arranged in the direction of the pole piece carrier.

[0020] By adopting the above technical scheme, the drying mechanism further comprises a heating fan; through the arrangement of the heating fan, the hot air generated by the heating fan can uniformly blow on the surface of the pole piece, which helps to reduce the temperature gradient in the drying process, so that the drying degree of each part of the pole piece is more consistent, and the quality stability and consistency of the pole piece are improved.

[0021] Optionally, a frame plate for mounting the heating resistance pipe is arranged in the box body, the heating resistance pipe is arranged on the frame plate, and the frame plate is connected in the box body.

[0022] By adopting the above technical scheme, the heating resistance tube is installed in the box through the frame plate; through the setting of the frame plate, the frame plate provides a stable support platform for the heating resistance tube, ensuring the stability and position accuracy of the heating resistance tube in the box, effectively preventing displacement or deformation of the heating resistance tube due to vibration, external force or temperature change, and ensuring the overall structural stability and reliability of the equipment.

[0023] To sum up, the present application includes at least one of the following beneficial technical effects:

[0024] Through the setting of the rack, the box, the spraying mechanism and the like, it is helpful to further uniformly spread and penetrate the slurry on the surface of the pole piece, reduce the stress concentration phenomenon caused by uneven distribution of the slurry, slow down the drying speed of the pole piece before entering the drying mechanism, give the slurry more time for natural spreading and penetration, thereby reducing the cracking risk caused by rapid drying, improving the overall quality of the pole piece, and enhancing the battery performance;

[0025] Through the setting of the transmission mechanism, double transmission means that two groups of pole piece carriers can be processed at the same time, significantly improving the production efficiency, especially suitable for large-scale production environment, which can greatly shorten the production cycle and meet the rapid demand of the market for battery products;

[0026] Through the setting of the two groups of heating resistance tubes, the two groups of heating resistance tubes work at the same time, which can quickly increase the temperature of the drying area, accelerate the evaporation and drying process of the water on the surface of the pole piece, and help to shorten the drying time and improve the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic view of a pole piece production baking device in an embodiment of the present application.

[0028] Figure 2 is a sectional view of a pole piece production baking device in an embodiment of the present application.

[0029] Figure 3 is a structural schematic view of an atomizing nozzle in an embodiment of the present application.

[0030] Explanation of reference signs: 1, rack; 2, transmission mechanism; 21, transmission belt; 3, box; 31, pole piece inlet; 32, pole piece outlet; 4, drying mechanism; 41, heating resistance tube; 42, heating fan; 5, spraying mechanism; 51, spraying pipe; 52, booster pump; 53, liquid container; 54, atomizing nozzle; 6, hinged seat; 7, support frame; 8, frame plate. DETAILED DESCRIPTION

[0031] The following will be described in detail in combination with the accompanying Figures 1-3 The present application will be further described in detail.

[0032] The embodiment of the application discloses a pole piece production baking device. Referring to Figure 1 and Figure 2 , the pole piece production baking device comprises a rack 1, a box body 3 is installed on the rack 1, the inside of the box body 3 is a hollow structure, a pole piece inlet 31 and a pole piece outlet 32 are respectively arranged at two ends of the box body 3, and the pole piece inlet 31 and the pole piece outlet 32 are both communicated with the inside of the box body 3 in the embodiment.

[0033] Referring to Figure 1 and Figure 2 , a transmission mechanism 2 is installed on the rack 1, the transmission mechanism 2 is arranged from the pole piece inlet 31 to the direction of the pole piece outlet 32 in the embodiment, the transmission mechanism 2 is used for transmitting a pole piece carrier, the transmission mechanism 2 comprises two transmission belts 21, the two transmission belts 21 are oppositely arranged on the rack 1, any transmission belt 21 is arranged from the pole piece inlet 31 of the box body 3 to the direction of the pole piece outlet 32 of the box body 3, and the transmission belt 21 has a corresponding driving unit; double-belt transmission means that two groups of pole piece carriers can be processed at the same time, the production efficiency is significantly improved, and the device is especially suitable for a large-scale production environment, the production cycle can be greatly shortened, and the rapid demand of the market for battery products can be met.

[0034] Referring to Figure 1 and Figure 2 , a drying mechanism 4 and a spraying mechanism 5 are installed in the box body 3, the spraying mechanism 5 is arranged at the front end of the drying mechanism 4, the spraying mechanism 5 is used for spraying the surface of the pole piece carrier, and the spraying mechanism 5 comprises a spraying pipe 51, a booster pump 52, a liquid container 53 and an atomizing nozzle 54.

[0035] Referring to Figure 1 and Figure 2 , the liquid container 53 is installed outside the box body 3, the input end of the booster pump 52 is communicated to the liquid container 53, the output end of the booster pump 52 is communicated to the spraying pipe 51, the spraying pipe 51 extends into the box body 3, a support frame 7 is fixedly installed in the box body 3, and the spraying pipe 51 is arranged on the support frame 7; the support frame 7 provides stable support for the spraying pipe 51, ensures the stability and position accuracy of the spraying pipe 51 in the box body 3, helps to prevent the spraying pipe 51 from being displaced or deformed due to vibration or external force, and thus ensures the uniformity and stability of the spraying liquid.

[0036] Referring to Figure 1 and Figure 2The atomizing nozzles 54 are communicated to the spray pipe 51, and the atomizing nozzles 54 are arranged towards the direction of the pole piece carrier. In the embodiment, the number of the atomizing nozzles 54 is multiple groups, the multiple groups of atomizing nozzles 54 are arranged along the width direction of the rack 1, and the multiple groups of atomizing nozzles 54 are arranged above the two transmission belts 21 respectively. The multiple groups of atomizing nozzles 54 ensure that the slurry of each position of the pole piece carrier can be uniformly sprayed during the transmission process, which helps to further improve the uniformity of the slurry, reduce the stress concentration phenomenon caused by uneven spraying, and further reduce the risk of pole piece cracking.

[0037] With reference to Figure 1 and Figure 3 The front end of any atomizing nozzle 54 is provided with a hinged seat 6. In the embodiment, the front end of the atomizing nozzle 54 is a metal hose, and the hinged seat 6 is used to adjust the angle of the atomizing nozzle 54. The spraying effect is optimized, the spraying angle of the atomizing nozzle 54 can be accurately adjusted, the sprayed liquid can accurately cover each position of the pole piece carrier and the pole piece surface, which helps to improve the accuracy of spraying, reduce the waste of liquid, and ensure that the pole piece is uniformly sprayed.

[0038] With reference to Figure 2 The drying mechanism 4 includes two groups of heating resistance tubes 41 and a plurality of heating fans 42. The two groups of heating resistance tubes 41 are arranged on the two sides of the transmission belt 21 respectively. In the embodiment, the heating resistance tubes 41 are located on the upper surface and the lower surface of the transmission belt 21 respectively, and any heating resistance tube 41 is arranged from the pole piece inlet 31 of the box body 3 to the direction of the pole piece outlet 32 of the box body 3. The two groups of heating resistance tubes 41 work simultaneously, which can rapidly increase the temperature of the drying area, accelerate the evaporation and drying process of the water on the surface of the pole piece, help to shorten the drying time, and improve the production efficiency.

[0039] With reference to Figure 2 Two frame plates 8 are installed in the box body 3, and the two frame plates 8 correspond to the two heating resistance tubes 41 respectively. The frame plates 8 are installed in the box body 3. The frame plates 8 provide a stable support platform for the heating resistance tubes 41, which ensures the stability and position accuracy of the heating resistance tubes 41 in the box body 3, effectively prevents the displacement or deformation of the heating resistance tubes 41 due to vibration, external force or temperature change, and guarantees the overall structural stability and reliability of the equipment.

[0040] With reference to Figure 2 The plurality of heating fans 42 are arranged in the box body 3, and any heating fan 42 is arranged towards the direction of the pole piece carrier. The hot air generated by the heating fan 42 can uniformly blow on the surface of the pole piece, which helps to reduce the temperature gradient in the drying process, makes the drying degree of each part of the pole piece more consistent, and improves the quality stability and consistency of the pole piece.

[0041] The implementation principle of the pole piece production baking device is as follows: after the pole piece is coated, the slurry is uniformly coated on the pole piece; after the coating is completed, the pole piece carrier is sent into the box body 3 by the transmission mechanism 2; before entering the drying mechanism 4, the pole piece carrier first passes through the spraying mechanism 5; the liquid (may be water or other solvents) in the liquid container 53 is pressurized by the booster pump 52, and then is sent into the spraying pipe 51; the liquid in the spraying pipe 51 is atomized into tiny droplets by the atomizing nozzle 54, and is uniformly sprayed on the pole piece carrier and the pole piece surface; after the pole piece carrier passes through the spraying mechanism 5, the pole piece carrier enters the drying mechanism 4 to heat and dry the pole piece; after the drying is completed, the pole piece carrier is sent out of the box body 3 through the pole piece outlet 32; the rack 1, the box body 3, the spraying mechanism 5 and the like are arranged, which is helpful to further uniformly spread and penetrate the slurry on the pole piece surface, reduces the stress concentration phenomenon caused by uneven distribution of the slurry, the spraying treatment can slow down the drying speed of the pole piece before entering the drying mechanism 4, gives the slurry more time for natural spreading and penetration, thereby reducing the cracking risk caused by rapid drying, improving the overall quality of the pole piece, and enhancing the battery performance.

[0042] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. An electrode tab production baking apparatus comprising a frame (1), characterized in that: The rack (1) is provided with a conveying mechanism (2) for conveying the pole piece carrier, the rack (1) is provided with a box (3), the two ends of the box (3) are respectively provided with a pole piece inlet (31) and a pole piece outlet (32), the box (3) is provided with a drying mechanism (4) and a spraying mechanism (5), the spraying mechanism (5) is arranged at the front end of the drying mechanism (4), the spraying mechanism (5) comprises a spraying pipe (51), a booster pump (52), a liquid container (53) and an atomizing nozzle (54), the liquid container (53) is arranged outside the box (3), the input end of the booster pump (52) is communicated with the liquid container (53), the output end of the booster pump (52) is communicated with the spraying pipe (51), the spraying pipe (51) is arranged in the box (3), the atomizing nozzle (54) is communicated with the spraying pipe (51), and the atomizing nozzle (54) is arranged towards the pole piece carrier.

2. The pole piece production baking apparatus according to claim 1, characterized by: The conveying mechanism (2) comprises two transmission belts (21), the two transmission belts (21) are oppositely arranged on the rack (1), and the two transmission belts (21) are arranged from the pole piece inlet (31) of the box (3) to the pole piece outlet (32) of the box (3).

3. The pole piece production baking apparatus according to claim 2, characterized by: The number of the atomizing nozzles (54) is multiple groups, the multiple groups of atomizing nozzles (54) are arranged along the width direction of the rack (1), and the multiple groups of atomizing nozzles (54) are distributed above the two transmission belts (21).

4. The pole piece production baking apparatus according to claim 3, characterized by: The front end of any atomizing nozzle (54) is provided with a hinged seat (6) for adjusting the nozzle angle.

5. The pole piece production baking apparatus according to claim 1, characterized by: The box (3) is provided with a support frame (7) for supporting the spraying pipe (51), and the support frame (7) is connected in the box (3).

6. The pole piece production baking apparatus according to claim 1, characterized by: The drying mechanism (4) comprises two groups of heating resistance pipes (41), the two groups of heating resistance pipes (41) are arranged on the two sides of the transmission belt (21) respectively, and any group of heating resistance pipes (41) is arranged from the pole piece inlet (31) of the box (3) to the pole piece outlet (32) of the box (3).

7. The pole piece production baking apparatus according to claim 6, characterized by: The drying mechanism (4) further comprises a heating fan (42), the heating fan (42) is arranged on the box (3), and the heating fan (42) is arranged towards the pole piece carrier.

8. The pole piece production baking apparatus according to claim 6, characterized by: The box (3) is provided with a frame plate (8) for mounting the heating resistance pipe (41), the heating resistance pipe (41) is arranged on the frame plate (8), and the frame plate (8) is connected in the box (3).

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