Battery pole piece winding equipment

Abstract

The utility model discloses battery pole piece winding equipment which comprises front end roll shafts, a middle roll shaft, a feeding transition roll, a rubber roll, a salient point roll and a discharging transition roll, a pole lug sensor is arranged between the two front end roll shafts, a channel is arranged between the rubber roll and the salient point roll, embossing protrusions are evenly arranged along the outer ring of the salient point roll, and the middle roll shaft is connected with the middle roll shaft. The end of the salient point roller is connected with a transmission mechanism, and the discharging transition roller is installed on the lower side of the base. The device is scientific and reasonable in structural design, in the working process, a battery pole piece belt passes through the position above the salient point roller and is detected by the pole lug sensor, so that the device reaches a proper position, a pole piece is clamped between the rubber roller and the salient point roller, and knurling patterns are formed on the surface of the pole piece under the action of the knurling protrusions on the surface of the salient point roller; and the processing quality of the pole piece is improved by a high-hardness and high-wear-resistance surface treatment process.

Description

Technical Field

[0001] This utility model relates to the technical field of battery electrode winding equipment, specifically a battery electrode winding equipment. Background Technology

[0002] With the development of new energy vehicles, the market demand for automotive power batteries is increasing, and the requirements are becoming more stringent. In the battery production process, to achieve higher energy density, the compaction density of the electrode sheets is generally increased during battery manufacturing. However, this causes excessive expansion of the negative electrode sheet during charging and discharging, leading to severe internal deformation and affecting the battery's cycle performance and safety. To address these issues, embossing rollers are typically used to compact the battery electrode sheets during production. However, existing embossing rollers have poor compaction effects and cannot capture the electrode tab position in real time, resulting in inaccurate pressing timing and easily causing electrode wrinkles or misalignment. Traditional embossed rollers lack wear resistance, and the embossed protrusions wear down easily after long-term use, affecting the uniformity of the electrode surface texture and thus reducing the winding yield. Therefore, we propose a battery electrode winding device. Utility Model Content

[0003] The purpose of this invention is to provide a battery electrode winding device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a battery electrode winding device, comprising a front end roller, an intermediate roller, a feeding transition roller, a rubber roller, a dot roller, and a discharge transition roller, wherein an electrode tab sensor is mounted between the two front end rollers via a mounting bracket, and the electrode tab sensor is a photoelectric sensor or a magnetic induction sensor.

[0005] An electrode channel is formed between the rubber roller and the embossed roller. The outer ring of the embossed roller is uniformly provided with triangular pyramidal embossed protrusions, and the end is connected to the power linkage through a sprocket and a chain. The power linkage is driven by an electric motor.

[0006] The discharge transition roller is installed on the lower side of the base, and the base has an electrode guide groove.

[0007] In the above scheme, there are two front-end rollers and two intermediate rollers, which are symmetrically distributed on both sides of the electrode conveying path.

[0008] In the above scheme, the surface of the bump roller is treated with hard anodizing.

[0009] In the above scheme, the electrode sensor is electrically connected to the motor to form a closed-loop control circuit.

[0010] In the above scheme, the front roller shaft, intermediate roller shaft, feed transition roller, rubber roller, convex roller, and discharge transition roller can all be rotatably mounted on the side of the mounting plate.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This battery electrode winding equipment has a simple and reasonable structural design and strong practicality. It is an integrated winding mechanism composed of a tab sensor, a feed transition roller, a convex roller, a rubber roller, a power linkage, a motor, and a discharge transition roller. During operation, the battery electrode strip passes over the convex roller and is detected by the tab sensor, so that the equipment reaches the appropriate position. Under the action of the embossing convex roller, an embossed pattern is formed on the surface of the electrode. The lightweight, high hardness, and high wear-resistant surface treatment process of the convex roller improves the processing quality of the electrode. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the structure of this utility model.

[0014] In the figure: 1. Front roller 11. Middle roller 12. Electrode sensor 13. Mounting frame 14. Feed transition roller 15. Rubber roller 16. Dotted roller 17. Base 18. Discharge transition roller 19. Embossing protrusion 2. Sprocket 21. Chain 22. Power linkage 23. Motor 24. Mounting plate. Detailed Implementation

[0015] 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.

[0016] Please see Figure 1-2 This utility model provides a technical solution: a battery electrode winding device, including a front end roller 1, an intermediate roller 11, a feeding transition roller 14, a rubber roller 15, a dot roller 16, and a discharge transition roller 18. An electrode tab sensor 12 is installed between the two front end rollers 1 via a mounting bracket 13. The electrode tab sensor 12 is a photoelectric sensor or a magnetic induction sensor. The electrode tab sensor 12 is a slotted photoelectric sensor or a magnetoresistive sensor, and its detection window is perpendicular to the electrode transmission path, which can sense the position signal of the electrode tab in real time.

[0017] An electrode channel is formed between the rubber roller 15 and the embossed roller 16. The outer ring of the embossed roller 16 is uniformly provided with triangular pyramidal embossed protrusions 19, and its end is connected to the power linkage 22 through the sprocket 2 and the chain 21. The power linkage 22 is driven by the motor 23. Furthermore, the rubber roller 15 is mounted on the mounting plate 24 through a linear bearing and a guide rod, and its end is connected to a compression spring with a preload force of 50-100N to ensure flexible contact with the embossed roller 16.

[0018] The discharge transition roller 18 is installed on the lower side of the base 17, and the base 17 has an electrode guide groove.

[0019] The end of the power linkage 22 is provided with a chain 21 that cooperates with it. Under the action of the motor 23, the power linkage 22 is driven to rotate, and then the sprocket 2 and the chain 21 are used to drive the convex roller 16 to rotate. Thus, the convex roller 16 and the rubber roller 15 can cooperate to press patterns on the surface of the electrode sheet.

[0020] The outer ring of the embossed roller 16 is uniformly provided with triangular pyramidal embossed protrusions 19, each with a height of 0.1-0.3 mm and a bottom side length of 0.5-1 mm. The spacing between adjacent protrusions is 1-2 mm, arranged in a matrix. The end of the embossed roller 16 is fixedly mounted with a sprocket 2 via a key connection. The sprocket 2 is connected to the end of a power linkage 22 via a chain 21. The power linkage 22 is driven by a servo motor 23 to achieve constant or variable speed rotation of the embossed roller 16.

[0021] The discharge transition roller 18 is installed on the lower side of the base 17. The base 17 is an inverted T-shaped steel structure. A rectangular electrode guide groove with a width 5-10mm wider than the electrode is opened on its top surface. The edge of the groove is rounded (radius 1-2mm) to avoid scratching the electrode.

[0022] The end of the drive link 22 is equipped with a double-row roller bearing, which mates with the bearing housing on the mounting plate 24 to ensure rotational accuracy. Under the action of the motor 23, the drive link 22 drives the sprocket 2 to rotate via the chain 21, thereby driving the dot roller 16 to rotate.

[0023] In the above scheme, two of each of the front roller 1 and the intermediate roller 11 are provided, symmetrically distributed on both sides of the electrode conveying path. The roller surface is plated with a hard chrome layer to reduce the electrode conveying resistance.

[0024] In the above scheme, the surface of the bump roller 16 is treated with hard anodizing.

[0025] In the above scheme, the embossed protrusions 19 are triangular pyramidal in shape. By setting several equidistantly arranged embossed protrusions 19 on the surface of the embossed roller 16, it is beneficial to improve the compaction density of the battery electrode sheets, thereby increasing the overall energy density of the battery. On the other hand, it provides deformation space in advance for the deformation of the battery electrode sheets during charging and discharging, effectively avoiding the phenomenon of excessive expansion of the battery electrode sheets, and improving the reliability of the battery. This process can both improve the compaction density of the battery electrode sheets and alleviate the problem of excessive expansion of the battery electrode sheets during charging and discharging. This process can significantly improve the wear resistance and corrosion resistance of the embossed roller, extend its service life, and ensure that the embossed protrusions 19 maintain sharp edges for a long time, ensuring clear texture on the electrode sheet surface.

[0026] By setting several equidistant triangular pyramidal embossed protrusions 19 on the surface of the embossed roller 16, with the tip angle of the protrusions being 60°-90°, a regular array of pits is formed on the surface of the electrode. On the one hand, the pits can increase the actual compaction area of ​​the electrode, thereby increasing the compaction density; on the other hand, the pits provide a buffer space for the expansion of the electrode during charging and discharging. Tests have shown that this can reduce the expansion rate of the electrode and effectively avoid the problem of winding wrinkles caused by excessive expansion.

[0027] The electrode sensor 12 is electrically connected to the motor 23, forming a closed-loop control circuit. The electrode sensor 12 is also electrically connected to the controller (such as a PLC or motion control card) of the motor 23 via a shielded cable, forming a closed-loop control circuit. When the electrode sensor 12 detects that the electrode has passed under the front roller 1, it immediately sends a signal to the controller, which then controls the motor 23 to adjust according to a preset program.

[0028] In the above scheme, the front roller 1, intermediate roller 11, feed transition roller 14, rubber roller 15, dotted roller 16, and discharge transition roller 18 are all rotatably mounted on the side of the mounting plate 24. The front roller 1, intermediate roller 11, feed transition roller 14, rubber roller 15, dotted roller 16, and discharge transition roller 18 are all rotatably mounted on the side of the mounting plate 24 via deep groove ball bearings. The mounting plate 24 is a 20mm thick Q235 steel plate with reinforcing ribs welded to the back to ensure overall structural rigidity.

[0029] Working principle:

[0030] The battery electrode winding equipment mainly includes the following processes during operation:

[0031] Electrode pre-transfer: After the electrode is drawn out by the unwinding mechanism, it passes through the front roller 1, the middle roller 11 and the feed transition roller 14 in sequence to complete the tension adjustment and path calibration;

[0032] Electrode detection and embossing trigger: When the electrode moves with the electrode sheet between the two front rollers 1, the electrode sensor 12 detects the electrode signal and transmits it to the controller. The controller instructs the motor 23 to maintain the current speed or adjust it to the embossing process speed.

[0033] Embossing process: The electrode sheet enters the channel between the rubber roller 15 and the embossed roller 16. Under the rotation of the embossed roller 16, the triangular cone embossing protrusions 19 press out regular pits on the surface of the electrode sheet, while the rubber roller 15 provides uniform pressure.

[0034] Electrode delivery: After embossing, the electrode is guided through the guide slot of the base 17 and conveyed by the discharge transition roller 18 to the subsequent winding mechanism to complete the entire embossing and winding process.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A battery electrode winding device, comprising a front end roller (1), an intermediate roller (11), a feed transition roller (14), a rubber roller (15), a dotted roller (16), and a discharge transition roller (18), characterized in that: A tab sensor (12) is mounted between the two front end rollers (1) via a mounting bracket (13). The tab sensor (12) is a photoelectric sensor or a magnetic sensor. An electrode channel is formed between the rubber roller (15) and the embossed roller (16). The outer ring of the embossed roller (16) is uniformly provided with triangular cone-shaped embossed protrusions (19). The end is connected to the power linkage (22) through the sprocket (2) and the chain (21). The power linkage (22) is driven by the electric motor (23). The discharge transition roller (18) is installed on the lower side of the base (17), and the base (17) has an electrode guide groove.

2. The battery electrode winding equipment according to claim 1, characterized in that: Two of each of the front roller (1) and the middle roller (11) are provided, symmetrically distributed on both sides of the electrode conveying path.

3. The battery electrode winding equipment according to claim 1, characterized in that: The surface of the bump roller (16) is treated with hard anodizing.

4. The battery electrode winding equipment according to claim 1, characterized in that: The electrode sensor (12) is electrically connected to the motor (23) to form a closed-loop control circuit.

5. A battery electrode winding device according to claim 1, characterized in that: The front roller (1), intermediate roller (11), feed transition roller (14), rubber roller (15), dot roller (16), and discharge transition roller (18) can all be rotatably mounted on the side of the mounting plate (24).

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