Polymer lithium battery cell pole piece coating device

Abstract

The utility model relates to the technical field of battery cell pole piece coating, in particular to a polymer lithium battery cell pole piece coating device which comprises a mounting frame, a winding roller is arranged in the mounting frame, a coating mechanism comprises two coating nozzles arranged in the mounting frame, the two coating nozzles are oppositely arranged, and the winding roller is arranged on the mounting frame. The two coating nozzles are in sliding connection with the inner side of the mounting frame; the two coating nozzles are oppositely arranged at the upper end and the lower end of the pole piece, so that the two surfaces of the pole piece can be directly and synchronously sprayed when the pole piece passes through the space between the two coating nozzles, and the working efficiency is effectively improved. Meanwhile, the distance between the two coating nozzles and the pole piece can be adjusted by arranging the two-way lead screw, the probability that the pole piece cannot be used due to coating errors caused by dislocation is reduced by arranging the deviation correcting assembly, the production cost is saved, and the environmental pollution can be reduced while the production cost is reduced by arranging the collecting shells on the two sides of the lower coating nozzle.

Description

Technical Field

[0001] This utility model relates to the field of battery cell electrode coating technology, and in particular to a polymer lithium battery cell electrode coating device. Background Technology

[0002] To improve battery performance, ensure electrode uniformity, control electrode thickness, and enhance battery safety, polymer lithium-ion battery cell electrodes need to be coated. Coated electrodes provide a larger surface area, facilitating full contact between the electrode material and the electrolyte, while ensuring uniform electrode thickness, reducing defects, and improving stability and reliability, thereby mitigating safety risks. A polymer lithium-ion battery cell electrode coating device is required for this coating process.

[0003] According to the Chinese patent "A device for dispensing and coating battery cell electrode sheets" authorized announcement number "CN219615945U", this utility model can effectively coat the positive electrode paste evenly on the surface of the battery cell electrode sheet, and can set blank areas at intervals.

[0004] The aforementioned application can only coat one side of the battery cell electrode sheet at a time when coating the electrode sheet, while the electrode sheet usually needs to be coated on both sides. The device requires a second coating of the electrode sheet to coat both sides, which is inefficient and not conducive to production.

[0005] Therefore, a polymer lithium battery cell electrode coating device is proposed to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a polymer lithium battery cell electrode coating device to solve the above-mentioned problems, thereby improving the problem that it is impossible to coat both sides of the electrode simultaneously.

[0007] This utility model achieves the above-mentioned objective through the following technical solution: a polymer lithium battery cell electrode coating device, comprising: a mounting frame, wherein a roller is provided inside the mounting frame;

[0008] The coating mechanism includes two coating nozzles disposed inside the mounting frame. The two coating nozzles are arranged opposite to each other and are slidably connected to the inner side of the mounting frame. A correction component is provided between the coating nozzles and the roll.

[0009] Preferably, the inner wall of the mounting bracket is provided with a bidirectional lead screw, and one end of each of the two coating nozzles is disposed on the surface of the bidirectional lead screw. Adjusting the distance between the coating nozzles and the electrode ensures uniformity in the coating process.

[0010] Preferably, a servo motor is fixedly connected to the top end of the bidirectional lead screw, the servo motor is fixedly connected to the top end of the mounting frame, and the bottom end of the bidirectional lead screw is rotatably connected to the inner wall of the mounting frame. Start the bidirectional lead screw.

[0011] Preferably, a collection shell is provided on both sides of the coating nozzle located below, and the collection shell is inserted into the coating nozzle. The coating liquid is collected for easy recycling.

[0012] Preferably, the alignment component includes an adjusting roller rotatably connected to the inner side of the mounting frame, a sliding frame positioned above the adjusting roller, an alignment roller rotatably connected inside the sliding frame, and a top end of the sliding frame slidably connected to the mounting frame. This allows for alignment of the electrode sheets.

[0013] Preferably, an electric push rod is fixedly connected to the inner top wall of the mounting frame, the drive end of the electric push rod is fixedly connected to the top of the sliding frame, infrared receivers are provided at both ends of the adjusting roller, and an infrared emitter is fixedly connected to the mounting frame above the infrared receivers. This allows for rapid sensing of the electrode position.

[0014] Preferably, a first rotating roller is disposed between the adjusting roller and the winding roller, and a second rotating roller is disposed on the side of the coating nozzle away from the winding roller. This stretches the electrode sheet to prevent wrinkles from forming on its surface.

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

[0016] 1. By positioning two coating nozzles opposite each other at the upper and lower ends of the electrode sheet, both sides can be simultaneously coated as the electrode sheet passes between the nozzles. This effectively reduces misalignment caused by shrinkage of the two sides after single-sided drying, and simultaneous coating of both sides reduces the number of coating passes, thus improving work efficiency. Furthermore, the distance between the two coating nozzles and the electrode sheet can be adjusted using a bidirectional lead screw.

[0017] 2. By setting up a correction component, when the electrode sheet shifts during the coating process, the infrared sensor and infrared transmitter can quickly receive the signal and drive the correction roller to reset the electrode sheet through the electric push rod, which reduces the probability of the electrode sheet being unusable due to coating errors caused by misalignment and saves production costs.

[0018] 3. By setting collection shells on both sides of the coating nozzle below, the coating liquid dripping during the coating process can be collected and recycled, reducing production costs and environmental pollution. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2This is a schematic diagram of the overall structure of the coating mechanism of this utility model;

[0021] Figure 3 This is a schematic diagram showing the installation of the coating nozzle and the collection shell of this utility model;

[0022] Figure 4 This is a schematic diagram of the overall structure of the correction component of this utility model.

[0023] In the diagram: 100, mounting frame; 200, roller; 210, first roller; 220, second roller; 300, coating mechanism; 310, coating nozzle; 311, collection shell; 320, bidirectional lead screw; 330, servo motor; 400, correction assembly; 410, adjusting roller; 411, infrared receiver; 420, correction roller; 421, sliding frame; 430, infrared transmitter; 440, electric push rod. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In practical implementation: such as Figure 1-4 As shown, a polymer lithium battery cell electrode coating device includes: a mounting frame 100, and a roller 200 is disposed inside the mounting frame 100;

[0026] The coating mechanism 300 includes two coating nozzles 310 disposed inside the mounting frame 100. The two coating nozzles 310 are disposed opposite to each other and are slidably connected to the inner side of the mounting frame 100. A correction component 400 is disposed between the coating nozzles 310 and the roller 200.

[0027] The coating nozzle 310 has a row of neat, fine nozzles inside. It uses compressed air as a power source, generates a certain working pressure through an air compressor, and then the compressed air enters the nozzle through a pressure regulating valve. It utilizes the Venturi effect to form a high-speed airflow at the nozzle throat, shearing and atomizing the coating material, thereby achieving coating.

[0028] like Figure 1 , Figure 2 and Figure 3As shown, a bidirectional lead screw 320 is provided on the inner wall of the mounting bracket 100. One end of each of the two coating nozzles 310 is provided on the surface of the bidirectional lead screw 320. A servo motor 330 is fixedly connected to the top of the bidirectional lead screw 320. The servo motor 330 is fixedly connected to the top of the mounting bracket 100. The bottom end of the bidirectional lead screw 320 is rotatably connected to the inner wall of the mounting bracket 100. A collection shell 311 is provided on both sides of the coating nozzle 310 located below. The collection shell 311 is inserted into the coating nozzle 310.

[0029] In this embodiment, the ends of the two coating nozzles 310 away from the servo motor 330 are subject to sliding friction with the mounting bracket 100; the first roller 210 and the second roller 220 are both rotatably connected between the two uprights, the diameter of the first roller 210 is equal to that of the second roller 220 and smaller than the diameter of the roll roller 200, and the roll roller 200 is also rotatably connected between the two uprights.

[0030] like Figure 1 and Figure 4 As shown, the correction assembly 400 includes an adjusting roller 410 rotatably connected to the inner side of the mounting frame 100, a sliding frame 421 above the adjusting roller 410, a correction roller 420 rotatably connected inside the sliding frame 421, a top end of the sliding frame 421 slidably connected to the mounting frame 100, an electric push rod 440 fixedly connected to the inner top wall of the mounting frame 100, a drive end of the electric push rod 440 fixedly connected to the top end of the sliding frame 421, infrared receivers 411 at both ends of the adjusting roller 410, an infrared emitter 430 fixedly connected to the mounting frame 100 above the infrared receivers 411, a first rotating roller 210 between the adjusting roller 410 and the roll 200, and a second rotating roller 220 on the side of the coating nozzle 310 away from the roll 200.

[0031] In this embodiment, the surface material of the correction roller 420 is silicone. The infrared transmitter 430, infrared receiver 411, and electric push rod 440 are controlled by a controller. The infrared transmitter 430 is responsible for emitting infrared rays, and the infrared receiver 411 is responsible for receiving the infrared rays emitted by the infrared transmitter 430. When the device is working normally, the electrode passes directly through the two infrared receivers 411 without contacting them. When the electrode shifts, its surface will cover the infrared receiver 411 at one end. When the infrared receiver 411 on that side cannot receive the corresponding infrared rays, it will send feedback to the controller. The controller will drive the sliding frame 421 to move according to the different signals fed back by the two infrared receivers 411, and correct the deviation of the electrode by the friction between the correction roller 420 and the electrode.

[0032] When using this utility model, the electrode sheet needs to be wound onto the winding roller 200 first, then one end of the electrode sheet passes through the lower surface of the first rotating roller 210, then between the adjusting roller 410 and the correcting roller 420, then between the two coating nozzles 310, and then through the upper surface of the second rotating roller 220. Then a pulling force is applied to it, and the two coating nozzles 310 are started at the same time.

[0033] Before the electrode passes through the two coating nozzles 310, the servo motor 330 needs to be started to drive the bidirectional lead screw 320 to rotate. The rotation of the bidirectional lead screw 320 drives the two coating nozzles 310 to move relative to each other, thereby adjusting the two coating nozzles 310 to a suitable distance from the electrode.

[0034] Two coating nozzles 310 simultaneously spray the front and back sides of the electrode. At this time, the electrode moves at a constant speed, and the coating nozzles 310 spray the coating liquid evenly onto the electrode before proceeding to the next process.

[0035] It should be noted that the servo motor 330 and electric linear actuator 440 mentioned above are all devices with relatively mature existing technology. The specific model can be selected according to actual needs. At the same time, the servo motor 330 and electric linear actuator 440 can be powered by the built-in power supply or by AC power. The specific power supply method should be selected according to the situation, which will not be elaborated here.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A polymer lithium battery cell electrode coating apparatus, characterized in that, include: Mounting bracket (100), the interior of which is provided with roller (200); The coating mechanism (300) includes two coating nozzles (310) disposed inside the mounting frame (100). The two coating nozzles (310) are disposed opposite to each other and are slidably connected to the inner side of the mounting frame (100). A correction assembly (400) is disposed between the coating nozzles (310) and the roll (200).

2. The polymer lithium battery cell electrode coating apparatus according to claim 1, characterized in that: The inner wall of the mounting bracket (100) is provided with a bidirectional lead screw (320), and one end of each of the two coating nozzles (310) is disposed on the surface of the bidirectional lead screw (320).

3. The polymer lithium battery cell electrode coating apparatus according to claim 2, characterized in that: A servo motor (330) is fixedly connected to the top of the bidirectional lead screw (320), and the servo motor (330) is fixedly connected to the top of the mounting bracket (100). The bottom of the bidirectional lead screw (320) is rotatably connected to the inner wall of the mounting bracket (100).

4. The polymer lithium battery cell electrode coating apparatus according to claim 1, characterized in that: Collection shells (311) are provided on both sides of the coating nozzle (310) located below, and the collection shells (311) are inserted into the coating nozzle (310).

5. The polymer lithium battery cell electrode coating apparatus according to claim 1, characterized in that: The correction assembly (400) includes an adjusting roller (410) rotatably connected to the inner side of the mounting frame (100), a sliding frame (421) is provided above the adjusting roller (410), the correction roller (420) is rotatably connected inside the sliding frame (421), and the top end of the sliding frame (421) is slidably connected between the mounting frames (100).

6. The polymer lithium battery cell electrode coating apparatus according to claim 5, characterized in that: An electric push rod (440) is fixedly connected to the inner top wall of the mounting bracket (100). The driving end of the electric push rod (440) is fixedly connected to the top end of the sliding frame (421). Infrared receivers (411) are provided at both ends of the adjusting roller (410). An infrared transmitter (430) fixedly connected to the mounting bracket (100) is provided above the infrared receivers (411).

7. The polymer lithium battery cell electrode coating apparatus according to claim 5, characterized in that: A first rotating roller (210) is provided between the adjusting roller (410) and the winding roller (200), and a second rotating roller (220) is provided on the side of the coating nozzle (310) away from the winding roller (200).

Images