A double-sided coating machine for lithium battery pole pieces

Abstract

The utility model discloses a kind of lithium battery pole piece double-sided coating machines, including rack;Integrated in the pole piece material conveying component of the rack, the pole piece material conveying component is used to transmit pole piece;Drying plate group is provided in the rack, and the drying plate group inside has heating element, to provide hot air by heating element and dry pole piece;The pole piece material conveying component is divided into pole piece feeding section and pole piece discharge section according to the technological process of pole piece coating, the drying plate group is divided into two groups, and the drying plate group of two groups is respectively arranged in the pole piece feeding section and pole piece discharge section;Two groups of drying plate group respectively dry pole piece at pole piece feeding section and pole piece discharge section place.The double-sided coating machine of the utility model carries out drying to pole piece of pole piece feeding section and pole piece discharge section by the two drying plate groups integrated in device respectively, improves drying efficiency.

Description

Technical Field

[0001] This utility model relates to the field of electrode coating technology, and in particular to a double-sided coating machine for lithium battery electrodes. Background Technology

[0002] Lithium batteries have advantages such as high voltage, large capacity, long cycle life, no memory effect, light weight, and wide operating range. In the process of lithium battery electrode processing, electrode coating machines are required. There are many types of lithium battery electrode coating machines. Common lithium battery electrode coating machines are mainly divided into single-sided coating machines and double-sided coating machines.

[0003] Currently, during the coating process of lithium battery electrodes, the subsequent drying process after coating is mostly carried out by drying the coated electrodes inside a drying chamber, such as the lithium battery electrode coating machine with patent publication number CN204208740U. In this drying process, the heat inside the drying chamber is relatively dispersed, and the electrodes can only be dried by natural transfer, resulting in low drying efficiency.

[0004] Therefore, based on the above-mentioned technical problems, those skilled in the art urgently need to develop a double-sided coating machine for lithium battery electrodes. Utility Model Content

[0005] The purpose of this invention is to provide a double-sided coating machine for lithium battery electrodes. This double-sided coating machine uses two sets of drying plates integrated inside the device to dry the electrodes in the electrode feeding section and the electrode discharging section respectively, thereby improving the drying efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model discloses a double-sided coating machine for lithium battery electrodes, which includes:

[0008] frame;

[0009] An electrode feeding assembly integrated within the frame is used to transport electrodes;

[0010] The frame is equipped with a drying plate assembly, and the drying plate assembly has a heating element inside, so as to provide hot air and dry the electrode sheets through the heating element;

[0011] The electrode feeding assembly is divided into an electrode feeding section and an electrode discharging section according to the electrode coating process. The drying plate group is divided into two groups, and the two groups of drying plate groups are respectively arranged in the electrode feeding section and the electrode discharging section.

[0012] The two sets of drying plates dry the electrodes at the electrode feeding section and the electrode discharge section, respectively.

[0013] Furthermore, the frame includes a base plate and a first fixed side plate and a second fixed side plate fixed to the upper two sides of the base plate;

[0014] The bottom of the base plate has a support leg, and the lower end of the support leg has a fixing plate fixed to the ground.

[0015] Furthermore, the electrode feeding assembly is integrated between the first fixed side plate and the second fixed side plate;

[0016] The two sets of drying plates are arranged at intervals along the height direction of the fixed side plate.

[0017] An electrode coating mechanism is provided at the upstream end of the drying plate assembly located above. The electrode conveying assembly transports the electrode sheets, which are coated on both sides by the electrode coating mechanism. The coated electrode sheets are then transported downstream along the process flow for drying.

[0018] Furthermore, the electrode feeding assembly includes:

[0019] A first rotating rod and a second rotating rod are installed at one end of the first fixed side plate and the second fixed side plate, with the first rotating rod positioned above the second rotating rod; and

[0020] Multiple tension adjusting rollers are installed between the first fixed side plate and the second fixed side plate;

[0021] An unwinding roller is provided on the outside of the first rotating rod, and the first rotating rod serves as the unwinding structure for the electrode sheet;

[0022] A take-up roller is provided on the outside of the second rotating rod, and the second rotating rod serves as a take-up structure for the electrode sheet;

[0023] The electrode sheet is conveyed into the device by the unwinding roller of the first rotating rod, and after being tensioned by multiple tension adjusting rollers in sequence, it is wound up by the winding roller of the second rotating rod.

[0024] Furthermore, both the second rotating rod and the first rotating rod are rotatably connected to the first fixed side plate via bearings;

[0025] The second rotating rod extends to one end of the outer side of the first fixed side plate and is equipped with a servo motor for driving the second rotating rod to rotate.

[0026] Furthermore, the number of tension adjusting rollers is four;

[0027] Two tension adjusting rollers are arranged at the end of the drying plate assembly near the rotating rod, and two tension adjusting rollers are arranged at the end of the drying plate assembly away from the rotating rod.

[0028] The four tension adjusting rollers are arranged sequentially along the conveying trajectory of the electrode sheet as the first tension adjusting roller, the second tension adjusting roller, the third tension adjusting roller, and the fourth tension adjusting roller;

[0029] The first tension adjusting roller and the second tension adjusting roller are in a horizontal position with the drying plate group located above, so as to convey the electrode sheet into the drying plate group located above.

[0030] The third and fourth tension adjusting rollers are positioned horizontally with the drying plate group below them to convey the electrode sheets into the drying plate group below them.

[0031] Furthermore, the drying plate assembly includes two hollow drying plates spaced apart from each other, and one side of each hollow drying plate has multiple extended frames protruding at intervals, the extended frames being processed with drying air holes;

[0032] A heating rod and a fan are provided inside the hollow drying plate and at a position matching the extension frame. The fan blows hot air outward through the drying air hole of the corresponding extension frame.

[0033] The extension frames of the two hollow drying plates are arranged opposite each other, and the hot air blown out of the drying vents is directed towards the electrode channel between the two hollow drying plates.

[0034] Furthermore, the extension frames of the two hollow drying plates in each set of drying plates are staggered with each other.

[0035] Furthermore, the first rotating rod and the second rotating rod are equipped with quick-release structures near one end of the second fixed side plate.

[0036] Furthermore, the quick-release structure is used to limit the relative positions of the first rotating rod and the unwinding roller, and the second rotating rod and the unwinding roller;

[0037] The end of the rotating rod is threadedly connected to a limit block.

[0038] In the above technical solution, the lithium battery electrode double-sided coating machine provided by this utility model has the following beneficial effects:

[0039] This invention relates to a double-sided coating machine for efficient and uniform drying. By employing hollow drying plates with extended frames arranged in an alternating pattern, along with internal heating rods and fans, hot air is concentrated and blown directly onto the electrode surface from multiple angles. Compared to traditional drying chambers that rely on natural heat transfer, this active, directional blowing drying method offers higher thermal efficiency and more uniform heat distribution, effectively solving the problems of low electrode drying efficiency and uneven drying, and significantly improving production efficiency and product quality.

[0040] This utility model's double-sided coating machine has a compact structure and stable operation: the reasonable layout of the tension adjusting roller and the electrode coating mechanism ensures stable tension and uniform coating of the electrode during transmission. Meanwhile, the unwinding and rewinding rollers are fixed by limiting blocks, facilitating easy assembly and disassembly, and ensuring accurate positioning, thus guaranteeing the stability and reliability of the equipment's operation.

[0041] This utility model features a highly practical overall design for its double-sided coating machine: the bottom of the equipment is secured by support legs and a fixing plate with mounting holes, ensuring stable installation. The entire machine has a reasonable layout, integrating unwinding, double-sided coating, efficient drying, and rewinding into one unit, with a high degree of automation, making it ideal for continuous, large-scale production of lithium battery electrodes. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0043] Figure 1 This is a schematic diagram of the structure of a lithium battery electrode double-sided coating machine disclosed in an embodiment of this application;

[0044] Figure 2 This is a schematic diagram of the internal structure of a lithium battery electrode double-sided coating machine disclosed in an embodiment of this application;

[0045] Figure 3 This is a front view of the interior of a lithium battery electrode double-sided coating machine disclosed in an embodiment of this application;

[0046] Figure 4 This is an exploded view of the structure of the first rotating rod and the second rotating rod of a lithium battery electrode double-sided coating machine disclosed in an embodiment of this application;

[0047] Figure 5 This is a cross-sectional view of the hollow drying plate of a lithium battery electrode double-sided coating machine disclosed in an embodiment of this application;

[0048] Figure 6 This is a bottom view of the hollow drying plate of a lithium battery electrode double-sided coating machine disclosed in an embodiment of this application.

[0049] Explanation of reference numerals in the attached figures:

[0050] 1. Base plate; 2. First fixed side plate; 3. Second fixed side plate; 4. First rotating rod; 5. Second rotating rod; 6. Unwinding roller; 7. Rewinding roller; 8. Electrode; 9. Servo motor; 10. Tension adjusting roller; 11. Electrode coating mechanism; 12. Hollow drying plate; 13. Extension frame; 14. Drying air hole; 15. Heating rod; 16. Fan; 19. Limiting block; 20. Support leg; 21. Fixing plate. Detailed Implementation

[0051] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0052] See Figures 1 to 6 As shown;

[0053] This embodiment discloses a double-sided coating machine for lithium battery electrodes, which includes:

[0054] frame;

[0055] An electrode feeding assembly integrated within the frame is used to transport electrode 8;

[0056] The frame is equipped with a drying plate assembly, and the drying plate assembly has a heating element inside, so as to provide hot air and dry the electrode 8 through the heating element;

[0057] The electrode feeding assembly is divided into an electrode feeding section and an electrode discharging section according to the electrode 8 coating process. The drying plate group is divided into two groups, and the two groups of drying plate groups are respectively arranged in the electrode feeding section and the electrode discharging section.

[0058] Two sets of drying plates are used to dry the electrode 8 at the electrode feeding section and the electrode discharge section, respectively.

[0059] Specifically, this embodiment discloses a double-sided coating machine with two sets of drying plates for drying and heating the electrode feeding section and electrode discharging section of the electrode 8, respectively. In this embodiment, a set of drying plates is arranged in the double-sided coating machine according to the electrode feeding section and the electrode discharging section. At the same time, the electrode 8 passes through the drying plates once from feeding to discharging. The hot air blown onto the electrode 8 by the drying plates dries the electrode, thereby improving the drying efficiency of the electrode 8.

[0060] Preferably, the frame of this embodiment includes a base plate 1 and a first fixed side plate 2 and a second fixed side plate 3 fixed to the upper two sides of the base plate 1; the bottom of the base plate 1 has a support leg 20, and the lower end of the support leg 20 has a fixed plate 21 fixed to the ground.

[0061] Preferably, in this embodiment, the electrode feeding assembly is integrated between the first fixed side plate 2 and the second fixed side plate 3; in this embodiment, the two sets of drying plate groups are arranged at intervals along the height direction of the fixed side plates.

[0062] An electrode coating mechanism 11 is provided at the upstream end of the drying plate assembly located above. The electrode 8 conveyed by the electrode feeding assembly is coated on both sides by the electrode coating mechanism 11, and the coated electrode 8 is conveyed downstream along the process flow for drying.

[0063] The electrode feeding assembly in this embodiment includes:

[0064] A first rotating rod 4 and a second rotating rod 5 are installed at one end of the first fixed side plate 2 and the second fixed side plate 3, with the first rotating rod 4 located above the second rotating rod 5; and

[0065] Multiple tension adjusting rollers 10 are installed between the first fixed side plate 2 and the second fixed side plate 3;

[0066] In order to realize the unwinding and rewinding of the electrode sheet, the first rotating rod 4 in this embodiment is provided with an unwinding roller 6, and the first rotating rod 4 serves as the unwinding structure of the electrode sheet 8; the second rotating rod 5 is provided with a rewinding roller 7, and the second rotating rod 5 serves as the rewinding structure of the electrode sheet 8.

[0067] The electrode sheet 8 is conveyed into the device by the unwinding roller 6 of the first rotating rod 4, and after being tensioned by multiple tension adjusting rollers 10 in sequence, it is wound up by the winding roller 7 of the second rotating rod 5.

[0068] In addition, in this embodiment, the second rotating rod 5 is an active component, while the first rotating rod 4 is a passive component. While the second rotating rod 5 is driven to rotate by the motor, the first rotating rod 4 can be driven to rotate by the movement of the pole piece 8, thereby realizing unwinding and rewinding. Specifically, in this embodiment, both the second rotating rod 5 and the first rotating rod 4 are rotatably connected to the first fixed side plate 2 through bearings; wherein, a servo motor 9 for driving the rotation of the second rotating rod 5 is installed at one end of the second rotating rod 5 extending to the outer side of the first fixed side plate 2.

[0069] In order to tension the electrode 8 to assist in the feeding of the electrode 8 and ensure that the electrode 8 can move according to the designed trajectory, the number of tension adjusting rollers 10 in this embodiment is four.

[0070] Two tension adjusting rollers 10 are arranged at the end of the drying plate assembly near the rotating rod, and two tension adjusting rollers 10 are arranged at the end of the drying plate assembly away from the rotating rod.

[0071] The four tension adjusting rollers 10 are arranged sequentially along the conveying trajectory of the electrode sheet 8 as the first tension adjusting roller, the second tension adjusting roller, the third tension adjusting roller, and the fourth tension adjusting roller;

[0072] The first tension adjusting roller and the second tension adjusting roller are in a horizontal position with the drying plate group located above, so as to convey the electrode 8 into the drying plate group located above.

[0073] The third and fourth tension adjusting rollers are positioned horizontally with the drying plate group below to convey the electrode 8 into the drying plate group below.

[0074] Preferably, as the main design mechanism of this embodiment, the drying plate assembly can perform drying operations simultaneously from both sides of the electrode sheet. Specifically, the drying plate assembly of this embodiment includes two hollow drying plates 12 that are spaced apart from each other, and a plurality of extension frames 13 are formed on one side of the hollow drying plate 12 at intervals. The extension frames 13 are processed with drying air holes 14.

[0075] A heating rod 15 and a fan 16 are provided inside the hollow drying plate 12 and at a position that matches the extension frame 13. The fan 16 blows hot air out through the drying air hole 14 of the corresponding extension frame 13.

[0076] The extension frames of the two hollow drying plates are set opposite each other, and the hot air blown out of the drying vents is directed towards the electrode channel between the two hollow drying plates.

[0077] In order to ensure that all positions of the electrode 8 are fully dried by hot air, the extension frames 13 of the two hollow drying plates 12 in each drying plate group of this embodiment are staggered with each other.

[0078] To further maintain the position of the take-up or unwind roll of the rotating rod and facilitate disassembly and assembly, the first rotating rod 4 and the second rotating rod 5 in this embodiment are equipped with quick-release structures near one end of the second fixed side plate 3.

[0079] In this embodiment, the quick-release structure is used to limit the relative positions of the first rotating rod 4 and the unwinding roller 6, and the second rotating rod 5 and the unwinding roller 7; the end of the rotating rod is threadedly connected to a limit block 19.

[0080] In the above technical solution, the lithium battery electrode double-sided coating machine provided by this utility model has the following beneficial effects:

[0081] This invention provides a highly efficient and uniform drying double-sided coating machine: by setting up hollow drying plates 12 with staggered upper and lower distribution and extension frames 13, and in conjunction with internal heating rods 15 and fans 16, hot air can be concentrated and blown directly onto the surface of the electrode 8 from multiple angles. Compared with traditional drying chambers that rely on natural heat transfer, this active, directional blowing drying method has higher thermal efficiency and more uniform heat distribution, effectively solving the problems of low drying efficiency and uneven drying of the electrode 8, and significantly improving production efficiency and product quality.

[0082] The double-sided coating machine of this invention has a compact structure and stable operation: the reasonable layout of the tension adjusting roller 10 and the electrode coating mechanism 11 ensures stable tension and uniform coating of the electrode 8 during the transmission process. At the same time, the unwinding roller 6 and the take-up roller 7 are fixed by limiting blocks, which makes disassembly and assembly convenient and positioning accurate, ensuring the stability and reliability of the equipment operation.

[0083] The double-sided coating machine of this utility model features a highly practical overall design: the bottom of the equipment is secured by support legs 20 and a fixing plate 21 with mounting holes, ensuring stable installation. The entire equipment has a reasonable layout, integrating unwinding, double-sided coating, efficient drying, and rewinding into one unit, with a high degree of automation, making it very suitable for continuous, large-scale production of lithium battery electrodes.

[0084] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A lithium battery pole piece double-sided coating machine, characterized in that, The double-sided coating machine includes: frame; An electrode feeding assembly integrated within the frame is used to transport electrodes (8); The frame is equipped with a drying plate assembly, and the drying plate assembly has a heating element inside, so as to provide hot air and dry the electrode sheet (8) through the heating element; The electrode feeding assembly is divided into an electrode feeding section and an electrode discharging section according to the electrode coating process (8). The drying plate group is divided into two groups, and the two groups of drying plate groups are respectively arranged in the electrode feeding section and the electrode discharging section. The two sets of drying plates respectively dry the electrode (8) at the electrode feeding section and the electrode discharge section.

2. The lithium battery electrode double-sided coating machine according to claim 1, characterized in that, The frame includes a base plate (1) and a first fixed side plate (2) and a second fixed side plate (3) fixed to the upper two sides of the base plate (1); The bottom of the base plate (1) has a support leg (20), and the lower end of the support leg (20) has a fixing plate (21) fixed to the ground.

3. A double-sided coating machine for lithium battery electrodes according to claim 2, characterized in that, The electrode feeding assembly is integrated between the first fixed side plate (2) and the second fixed side plate (3); The two sets of drying plates are arranged at intervals along the height direction of the fixed side plate. An electrode coating mechanism (11) is provided at the upstream end of the drying plate assembly located above. The electrode (8) conveyed by the electrode feeding assembly is coated on both sides by the electrode coating mechanism (11), and the coated electrode (8) is conveyed downstream along the process flow for drying.

4. A double-sided coating machine for lithium battery electrodes according to claim 3, characterized in that, The electrode feeding assembly includes: A first rotating rod (4) and a second rotating rod (5) are installed at one end of the first fixed side plate (2) and the second fixed side plate (3), with the first rotating rod (4) located above the second rotating rod (5); and Multiple tension adjusting rollers (10) are installed between the first fixed side plate (2) and the second fixed side plate (3); The first rotating rod (4) is provided with an unwinding roller (6) on its outside, and the first rotating rod (4) serves as the unwinding structure of the electrode sheet (8); The second rotating rod (5) is provided with a take-up roller (7) on its outside, and the second rotating rod (5) serves as the take-up structure of the electrode sheet (8); The electrode sheet (8) is conveyed into the device by the unwinding roller (6) of the first rotating rod (4), and after being tensioned by a plurality of tension adjusting rollers (10) in sequence, it is wound up by the winding roller (7) of the second rotating rod (5).

5. A double-sided coating machine for lithium battery electrodes according to claim 4, characterized in that, The second rotating rod (5) and the first rotating rod (4) are both rotatably connected to the first fixed side plate (2) through bearings; The second rotating rod (5) extends to one end of the first fixed side plate (2) and is equipped with a servo motor (9) for driving the second rotating rod (5) to rotate.

6. The double-sided coating machine for lithium battery pole pieces according to claim 4, characterized in that, The number of tension adjusting rollers (10) is four; Two tension adjusting rollers (10) are arranged at the end of the drying plate assembly near the rotating rod, and two tension adjusting rollers (10) are arranged at the end of the drying plate assembly away from the rotating rod. The four tension adjusting rollers (10) are arranged along the conveying trajectory of the electrode (8) as the first tension adjusting roller, the second tension adjusting roller, the third tension adjusting roller and the fourth tension adjusting roller; The first tension adjusting roller and the second tension adjusting roller are in a horizontal position with the drying plate group located above, so as to convey the electrode (8) into the drying plate group located above; The third and fourth tension adjusting rollers are in a horizontal position with the drying plate group located below, so as to convey the electrode (8) into the drying plate group located below.

7. The double-sided coating machine for lithium battery pole pieces according to claim 1, characterized in that, The drying plate assembly includes two hollow drying plates (12) spaced apart from each other, and one side of each hollow drying plate (12) has multiple extension frames (13) protruding at intervals, and the extension frames (13) are processed with drying air holes (14). A heating rod (15) and a fan (16) are provided inside the hollow drying plate (12) and at a position matching the extension frame (13). The fan (16) blows hot air out through the drying air hole (14) of the corresponding extension frame (13). The extension frames (13) of the two hollow drying plates (12) are arranged opposite to each other, and the hot air blown out of the drying air holes (14) is directed towards the electrode channel between the two hollow drying plates (12).

8. The lithium battery pole piece double-sided coating machine according to claim 7, characterized in that, The extension frames (13) of the two hollow drying plates (12) in each drying plate group are staggered with each other.

9. A double-sided coating machine for lithium battery electrodes according to claim 5, characterized in that, The first rotating rod (4) and the second rotating rod (5) are equipped with quick-release structures near one end of the second fixed side plate (3).

10. A double-sided coating machine for lithium battery electrodes according to claim 9, characterized in that, The quick-release structure is used to limit the relative positions of the first rotating rod (4) and the unwinding roller (6), and the second rotating rod (5) and the unwinding roller (7); The end of the rotating rod is threadedly connected to a limit block (19).

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