Device for detecting extension of rolling interval pole pieces on line in real time

Abstract

The utility model belongs to the technical field of lithium ion batteries, and particularly relates to a rolling interval pole piece on-line real-time extension detection device which comprises a transmission assembly, a rolling assembly, a detection assembly and a cleaning assembly, the transmission assembly comprises an unwinding roller, a winding roller, a guide roller and a battery pole piece, and the unwinding roller and the winding roller are arranged at the two ends respectively. And one end of the battery pole piece is wound on the unwinding roller. According to the utility model, the size of a powder area before and after the rolling of the battery pole piece is detected in real time through the CCD linear array sensor, and after the processing of the signal converter and the data analysis work station, the elongation percentage is calculated according to a formula (the size of the powder after rolling-the size of the powder before rolling) / the size of the powder before rolling, so that the online real-time detection of the pole piece rolling process is realized; manual measurement deviation is avoided, and the accuracy and efficiency of detection data are improved.

Description

Technical Field

[0001] This utility model belongs to the field of lithium-ion battery technology, specifically relating to a device for online real-time detection of the elongation of rolled spacer plates. Background Technology

[0002] In the field of lithium-ion battery production, lithium-ion batteries have extremely broad application prospects due to their significant advantages such as high voltage, high specific energy, high cycle life, and long storage time. With continuous technological advancements, the market's requirements for the cycle life and energy density of lithium-ion batteries are becoming increasingly stringent, making the processing technology of battery electrodes, especially the precision of the rolling process, crucial.

[0003] In the battery electrode production process, the core objective of the rolling operation is to make the powder on the electrode more dense and compact, and the degree of rolling directly affects battery performance and yield. Currently, the rolling of positive electrode spacers generally adopts a single cold pressing technique. During this process, the extension of the powder area on the front and back of the electrode needs to be detected simultaneously. However, existing detection technologies have significant drawbacks: on the one hand, due to the long length of the powder area, the detection operation is extremely inconvenient; on the other hand, when detecting the length of the powder area on the back, the operator needs to perform the measurement and calculation below the electrode, and the limited operating space easily leads to deviations in the measurement values.

[0004] Inaccurate test data will have a cascading effect on the output of subsequent energy density and cycle data, thereby affecting the overall quality and performance of the battery. Therefore, how to achieve online real-time detection of the electrode rolling and stretching process and improve the accuracy and efficiency of the test data has become a technical challenge that urgently needs to be solved in this field. Utility Model Content

[0005] The purpose of this invention is to provide a device for online real-time detection of the elongation of rolled spacer sheets, thereby solving the problems existing in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a device for online real-time detection of the elongation of rolled spacer sheets, comprising:

[0007] The transmission assembly includes an unwinding roller, a winding roller, and guide rollers. The two ends of the battery electrode are wound around the unwinding roller and the winding roller, respectively. Multiple guide rollers are spaced between the unwinding roller and the winding roller to guide the transmission of the battery electrode.

[0008] The rolling assembly, located between two adjacent guide rollers, includes a rolling equipment box and upper and lower rolling rollers located inside it. The two ends of the rolling rollers penetrate the side wall of the rolling equipment box and are connected to the drive disc.

[0009] The detection component includes a sensor bracket disposed between the unwinding roller and the rolling assembly, and between the winding roller and the rolling assembly. The sensor bracket is equipped with CCD linear array sensors corresponding to the upper and lower surfaces of the battery electrode, respectively. The CCD linear array sensors are connected to a data analysis workstation.

[0010] Clean up components, including:

[0011] Drive component: consists of a driven disc and a transmission belt, wherein the driven disc is linked to the drive disc of the rolling roller via the transmission belt;

[0012] Cleaning components include a drive shaft, a driven shaft, and a cleaning belt mounted thereon. The drive shaft is connected to the driven disc, and the cleaning belt is attached to and rubs against the surface of the roller.

[0013] A limiting plate and an arc-shaped pocket plate at its bottom end, wherein a guide groove is provided on the inner side of the pocket plate;

[0014] Cleaning block: Located on the outer wall of the cleaning belt, it includes a deformable arc-shaped cleaning plate, a fixed base plate, and an elastic reset band connecting the two. The cleaning plate has a through cavity communicating with the interior and a blade-shaped cleaning cavity.

[0015] Preferably, the cleaning belt and the rolling roller rotate in opposite directions and their contact surfaces are misaligned and squeezed, wherein when the rolling roller rotates counterclockwise, the drive shaft rotates counterclockwise synchronously, and the contact area of ​​the two forms a relative motion from bottom to top and from top to bottom.

[0016] Preferably, the cleaning plate contains a portion of the powder through the cavity to increase the structural fullness, and the powder adheres to the surface of the flexible scraper roller through the blade-shaped edge of the cleaning cavity.

[0017] Preferably, the guide groove of the sump plate extends obliquely from the middle to both ends and penetrates the side wall of the crushing equipment box to guide the discharged powder after cleaning.

[0018] Preferably, the two ends of the compaction roller are installed on the side wall of the compaction equipment box through movable sleeves, and the drive disc is movably disposed within the movable sleeves.

[0019] Preferably, in the cleaning assembly, the drive shaft and two sets of driven shafts are arranged in a triangle, and the cleaning belt is tensioned and sleeved on the surface of the three shafts.

[0020] The beneficial effects of this utility model are: 1. This utility model uses a CCD linear array sensor to detect the size of the powder area before and after the battery electrode is rolled in real time. After processing by a signal converter and a data analysis workstation, the elongation rate is calculated according to the formula (size of powder after rolling - size of powder before rolling) / size of powder before rolling, thereby realizing online real-time detection of the electrode rolling process, avoiding the deviation of manual measurement, and improving the accuracy and efficiency of detection data.

[0021] 2. The cleaning component uses the roller to drive the drive shaft, causing the cleaning belt to move out of alignment with the roller. The cleaning plate is elastically deformed by the resistance of the powder sticking to the roller, and the powder is removed by the deformation thrust and the restoring force. Its through cavity and cleaning cavity can accommodate the powder to enhance the fullness of the cleaning plate and the scraping force. With the help of the chute and guide groove, the powder is guided to be discharged, which not only achieves flexible cleaning of the roller and reduces equipment damage, but also prevents the powder from contaminating the electrode sheet and ensures a clean production environment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0023] Figure 2 This is a partial cross-sectional view of the present invention.

[0024] Figure 3 This is a partial structural diagram of the cleaning component in this utility model.

[0025] Figure 4 This is a partial structural diagram of the driving component in this utility model.

[0026] Figure 5 This is a partial structural diagram of the cleaning belt in this utility model.

[0027] Figure 6 This is a partial structural diagram of the cleaning plate in this utility model.

[0028] In the diagram: 1. Unwinding roller; 2. Rewinding roller; 3. Guide roller; 4. Battery electrode; 5. Sensor bracket; 6. CCD linear array sensor; 7. Compaction equipment box; 8. Compaction roller; 9. Movable sleeve plate; 10. Data analysis workstation; 11. Limit plate; 12. Drive shaft; 13. Driven shaft; 14. Cleaning belt; 15. Hoist plate; 16. Guide groove; 17. Driven disc; 18. Driven disc; 19. Drive belt; 20. Cleaning plate; 21. Base plate; 22. Reset belt; 23. Through cavity; 24. Cleaning cavity. Detailed Implementation

[0029] It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0030] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixed connection," and "fixed connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings and preferred embodiments. Example

[0033] Please see Figures 1-4In this embodiment of the invention, a device for online real-time detection and extension of rolled spacer plates includes a transmission assembly, a rolling assembly, a detection assembly, and a cleaning assembly. The transmission assembly includes an unwinding roller 1, a winding roller 2, a guide roller 3, and battery plates 4. The unwinding roller 1 and the winding roller 2 are respectively disposed at both ends. One end of the battery plate 4 is wound onto the unwinding roller 1, and the other end of the battery plate 4 is wound onto the winding roller 2. The guide rollers 3 are spaced between the unwinding roller 1 and the winding roller 2. The battery plate 4 passes sequentially through the guide rollers 3 from one end of the unwinding roller 1 and is wound onto the winding roller 2. The rolling assembly is disposed between the unwinding roller 1 and the winding roller 2. Guide rollers 3 are provided on both sides of the rolling assembly. The detection assembly is set between the unwinding roller 1 and the guide roller 3, and between the winding roller 2 and the guide roller 3. The detection assembly can detect and analyze the front and back dimensions of the battery electrode 4 before and after rolling, and output the analysis results to the monitor to achieve real-time monitoring. The calculation formula is: (powder size after rolling - powder size before rolling) / powder size before rolling. Real-time monitoring of the electrode extension after rolling can be achieved. The cleaning assembly is installed on the rolling assembly and can flexibly clean the roller sticking of the rolling assembly after the rolling assembly rolls the battery electrode 4.

[0034] The detection assembly includes a sensor bracket 5, a CCD linear array sensor 6, and a data analysis workstation 10. The sensor bracket 5 is positioned between the unwinding roller 1 and the guide roller 3, and between the winding roller 2 and the guide roller 3. The CCD linear array sensor 6 is mounted on the sensor bracket 5 at positions above and below the battery electrode 4. The CCD linear array sensor 6 is a publicly available technology and will not be described in detail here. The data analysis workstation 10 is also a publicly available technology and will not be described in detail here. The data analysis workstation 10 can analyze the data transmitted by the CCD linear array sensor 6 and output it to a monitor. By using four sets of CCD linear array sensors 6 to detect the dimensions of the spaced electrode powder area on the battery electrode 4 before and after rolling, the detected data is transmitted and uploaded to the data analysis workstation 10 through a signal converter for data processing and analysis. The analysis results are then output to the monitor to achieve real-time monitoring. The calculation formula is: (powder size after rolling - powder size before rolling) / powder size before rolling, which enables real-time monitoring of the electrode extension after rolling. On the other hand, the data is stored for later data collection and analysis.

[0035] The compaction assembly includes a compaction equipment box 7, compaction rollers 8, a movable sleeve plate 9, and a drive disc 17. The compaction equipment box 7 is mounted on the transmission assembly and is located between two sets of detection assemblies. Specifically, the compaction equipment box 7 is positioned between two adjacent sets of guide rollers 3. There are two sets of compaction rollers 8, which are located inside the compaction equipment box 7. The two sets of compaction rollers 8 are respectively positioned above and below the battery electrode 4. The movable sleeve plate 9 is installed on the outer side wall of the compaction equipment box 7 at the positions corresponding to the two ends of the compaction rollers 8. The drive disc 17 is movably mounted inside the movable sleeve plate 9. The two ends of the compaction rollers 8 penetrate through the corresponding wall surface of the compaction equipment box 7 and are connected to the drive disc 17. By rotating through the two sets of compaction rollers 8 and with the transmission of the battery electrode 4, the powder area on the battery electrode 4 can be effectively compacted.

[0036] The cleaning assembly includes a limiting plate 11, a sump plate 15, a guide groove 16, a cleaning component, and a driving component. The cleaning component is located on the right side of the rolling roller 8. As the rolling roller 8 rotates, the cleaning component contacts the rolling roller 8 and cleans the powder adhering to it. The limiting plate 11 is installed at the corresponding position of the upper cleaning component. Both ends of the limiting plate 11 are fixedly installed on the corresponding positions of the inner wall of the rolling equipment box 7. The sump plate 15 is fixedly installed at the bottom end of the limiting plate 11. The sump plate 15 is an arc-shaped plate, and there is a gap between the sump plate 15 and the cleaning component and the rolling roller 8. In accordance with the corresponding position, after the cleaning component cleans the rolling roller 8, the sump plate 15 can prevent powder from falling onto the battery electrode 4. The guide groove 16 is opened at both ends of the inner side of the sump plate 15. The guide groove 16 gradually slopes from the middle position of the sump plate 15 to both ends of the sump plate 15, and both ends of the sump plate 15 penetrate through the corresponding position wall of the rolling equipment box 7 and are connected to the outside. The inclined guide groove 16 can transfer the powder in the sump plate 15 to the designated position outside. The drive component is installed on the cleaning component, and the drive component can drive the cleaning component to rotate and clean.

[0037] The cleaning component includes a drive shaft 12, a driven shaft 13, and a cleaning belt 14. The drive shaft 12 is movably installed inside the compaction equipment box 7 and is connected to the drive component. The driven shaft 13 is located on the right side and bottom of the drive shaft 12, and both ends of the driven shaft 13 are movably installed inside the compaction equipment box 7. The cleaning belt 14 is fitted onto the drive shaft 12 and the two sets of driven shafts 13. The cleaning belt 14 is close to the compaction roller 8 and fits against the compaction roller 8, so that when the compaction roller 8 rotates, the cleaning belt 14 can effectively clean the powder stuck to the roller 8.

[0038] The driving components include a driven disc 18 and a transmission belt 19. The driven disc 18 is movably installed inside the movable sleeve 9 and is connected to the drive shaft 12. The transmission belt 19 is fitted onto the drive disc 17 and the driven disc 18. The drive disc 17 and the driven disc 18 connected by the transmission belt 19 cause the pressing roller 8 and the drive shaft 12 to rotate in the same direction. That is, when the pressing roller 8 rotates counterclockwise, the drive shaft 12 will also rotate counterclockwise. The pressing roller 8 and the drive shaft 12 are close to each other on one side. The pressing roller 8 rotates from bottom to top, and the drive shaft 12 rotates from top to bottom. This causes the contact point between the pressing roller 8 and the drive shaft 12 to produce a misaligned squeezing contact. The misaligned squeezing contact allows the powder stuck to the roller 8 to be squeezed by forces in two directions, thereby effectively scraping and cleaning the powder stuck to the roller 8. Example

[0039] Based on Example 1, such as Figures 5-6As shown, the cleaning assembly also includes a cleaning block, which comprises a cleaning plate 20, a base plate 21, a reset belt 22, a through cavity 23, and a cleaning cavity 24. The cleaning plates 20 are spaced apart on the outer sidewall of the cleaning belt 14. The cleaning plates 20 are deformable arc-shaped plates. After the deformable reset belt 22 contacts the powder on the rolling roller 8, the powder sticking to the roller will restrict the synchronous movement of the cleaning plates 20 and the cleaning belt 14, thus causing the cleaning plates 20 to deform accordingly. The deformation of the cleaning plates 20 obstructs and cleans the powder. The elastic restoring force of plate 20 can apply a pushing force to the powder on the roller 8, thereby effectively cleaning the powder on the roller 8. The base plate 21 is fixedly installed on the side wall of the cleaning belt 14 corresponding to one side wall of the cleaning plate 20. Specifically, the base plate 21 is located on the cleaning plate 20 on the side corresponding to the moving direction of the cleaning belt 14. The reset belt 22 is fixedly installed between the base plate 21 and the cleaning plate 20. The reset belt 22 can undergo elastic deformation, and one end of the cleaning plate 20 corresponding to the reset belt 22 is not connected to the cleaning belt 14. The elastically deformable reset band 22 can reset and recover after the cleaning plate 20 contacts the powder on the rolling roller 8. The through cavities 23 are spaced apart on the side wall of the cleaning plate 20 corresponding to the reset band 22, and are interconnected with the interior of the cleaning plate 20. Through the spaced-apart through cavities 23 connected to the interior of the cleaning plate 20, some powder can enter the interior of the cleaning plate 20 after contact with the rolling roller 8, preventing excessive powder from preventing the cleaning plate 20 from effectively cleaning the powder on the rolling roller 8. When cleaning occurs, the excess powder fills the cleaning plate 20, effectively increasing the overall fullness of the cleaning plate 20. This allows for the application of additional thrust to the powder on the roller 8, thereby improving the cleaning effect. A cleaning cavity 24 is provided in the cleaning plate 20 corresponding to the through cavity 23. The cleaning cavity 24 makes one end of the cleaning plate 20 corresponding to the through cavity 23 blade-shaped, which can effectively perform flexible scraping of the powder on the roller 8, thereby improving the cleaning effect of the powder on the roller 8.

[0040] The working principle of this utility model is as follows:

[0041] In use, this invention uses a CCD linear array sensor 6 to detect the dimensions of the area separating the electrode powder on the battery electrode sheet 4 before and after rolling. A signal converter transforms the captured target into an image signal and transmits it to a data analysis workstation 10. Based on pixel distribution, brightness, color, and other information, the signal is converted into a digital signal. The data analysis workstation 10 performs various calculations on these signals to filter the size of the detected target and calculates the elongation based on the detection results. The calculation formula is: (Dimensions of powder after rolling - Dimensions of powder before rolling) (Powder size) / Powder size before crushing; After the crushing roller 8 crushes the powder area on the battery electrode 4, the drive shaft 12 drives the cleaning belt 14 to contact the crushing roller 8 through the drive of the drive disc 17, driven disc 18 and drive belt 19. After the cleaning belt 14 and the crushing roller 8 come into contact, the powder stuck to the roller 8 can be effectively cleaned through the staggered extrusion. The cleaned powder will be transferred to the designated position through the hopper 15 and guide groove 16, thereby completing the cleaning of the crushing roller 8.

[0042] For those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A device for detecting the elongation of a rolling spacer pole piece in real time, characterized in that, The application relates to a battery pole piece cleaning device. The transmission assembly comprises a unwinding roller (1), a winding roller (2) and guide rollers (3), the battery pole piece (4) is wound on the unwinding roller (1) and the winding roller (2) respectively at two ends, and a plurality of guide rollers (3) are arranged at intervals between the unwinding roller (1) and the winding roller (2) to guide the transmission of the battery pole piece (4). The rolling assembly is arranged between two adjacent guide rollers (3) and comprises a rolling device box (7) and upper and lower rolling rollers (8) arranged in the rolling device box (7), the two ends of the rolling roller (8) penetrate through the side wall of the rolling device box (7) and are connected with driving discs (17). The detection assembly comprises a sensor support (5) arranged between the unwinding roller (1) and the rolling assembly and between the winding roller (2) and the rolling assembly, a CCD linear array sensor (6) corresponding to the upper surface and the lower surface of the battery pole piece (4) is arranged on the sensor support (5), and the CCD linear array sensor (6) is connected with a data analysis workstation (10). The cleaning assembly comprises a driving member composed of a driven disc (18) and a transmission belt (19), the driving disc (18) is connected with the driving disc (17) of the rolling roller through the transmission belt (19). The cleaning member comprises a driving shaft (12), a driven shaft (13) and a cleaning belt (14) sleeved on the driving shaft (12) and the driven shaft (13), the driving shaft (12) is connected with the driving disc (18), and the cleaning belt (14) is attached to and rubs against the surface of the rolling roller (8). A limiting plate (11) and an arc-shaped pocket plate (15) arranged at the bottom end of the limiting plate (11) are arranged, and a guide groove (16) is formed in the inner side of the pocket plate (15). The cleaning block is arranged on the outer wall of the cleaning belt (14) and comprises a deformable arc-shaped cleaning plate (20), a fixed base plate (21) and an elastic reset belt (22) connecting the two, the cleaning plate (20) is provided with a through cavity (23) and a blade-shaped cleaning cavity (24) which are in communication with the inside. The rotating direction of the cleaning belt (14) is opposite to that of the rolling roller (8), and the contact surfaces are dislocated and extruded, wherein when the rolling roller (8) rotates counterclockwise, the driving shaft (12) rotates counterclockwise synchronously, and the contact areas of the two form relative movements from bottom to top and from top to bottom.

2. The apparatus of claim 1, wherein: The cleaning plate (20) contains part of the powder through the through cavity (23) to increase the structural fullness, and the blade-shaped edge of the cleaning cavity (24) flexibly scrapes the surface of the rolling roller (8) to adhere the powder.

3. The apparatus of claim 1, wherein: The guide groove (16) of the pocket plate (15) extends obliquely from the middle to the two ends and penetrates through the side wall of the rolling device box (7), and is used for guiding the discharge of the cleaned powder.

4. The apparatus of claim 1, wherein: The two ends of the rolling roller (8) are installed on the side wall of the rolling device box (7) through a movable sleeve plate (9), and the driving disc (17) is movably arranged in the movable sleeve plate (9).

5. The apparatus of claim 1, wherein: The driving shaft (12) and the two groups of driven shafts (13) are in a triangular distribution in the cleaning assembly, and the cleaning belt (14) is tightly sleeved on the surfaces of the three shafts.

6. The apparatus of claim 1, wherein: ​

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