Rolling device and battery production system

Abstract

The utility model relates to a rolling device and a battery production system, and belongs to the technical field of battery production, the rolling device comprises a rolling assembly, the rolling assembly comprises a supporting roller and a pressing roller which are used for rolling a battery pole piece, and the pressing roller is provided with at least two annular protrusions matched with a battery pole piece coating area in the axial direction; the monitoring assembly comprises driven wheels connected with the annular protrusions in a rolling friction mode and a rotating speed sensor used for detecting the rotating speed of the driven wheels. According to the embodiment of the invention, the rotating speed of each driven wheel can be detected through the rotating speed sensor, then the abrasion degree difference of the surface of each annular bulge on the compression roller is reflected through the rotating speed difference of each driven wheel, and the abrasion degree difference influences the advancing difference of different film areas on the pole piece in the rolling process, so that monitoring and early warning can be indirectly carried out; and a user is assisted to quickly judge the reason of the abnormal state of the tab, so that belt breakage and subsequent process scrapping caused by the abnormal states such as crease penetration and wrinkling of the tab are greatly reduced.

Description

Technical Field

[0001] The present application relates to the technical field of battery production, and in particular to a rolling device and a battery production system. Background Art

[0002] Among the various indicators for battery electrode quality inspection, the state of the electrode tabs after cold pressing is a very important inspection indicator. Poor electrode tab condition may cause instability in secondary battery current and voltage, and even affect the safety performance of the battery.

[0003] In the related art, during the cold pressing step of the electrode preparation process, the extrusion force on the electrode will change with the force applied by the rubber pressing roller. When the surface of the rubber pressing roller is worn, the force applied by the rubber pressing roller will change more, which will cause the travel distance of the electrode film area corresponding to different coating areas to be different, and then cause the pole ear to have a through crease. At present, the detection method of the pole ear status is mainly visual inspection, which has the disadvantages of slow speed, low accuracy, and lack of process detection data.

[0004] In view of this, it is necessary to provide a rolling device and a battery production system to realize real-time monitoring of the wear status of the roller. By monitoring the wear status of the roller surface in contact with different membrane areas of the electrode piece, it is possible to monitor the travel differences of different membrane areas of the electrode piece during the rolling process and provide online early warning of the electrode ear status. Summary of the invention

[0005] In response to the deficiencies or one of the deficiencies raised by the above-mentioned background technology, the embodiments of the present application provide a rolling device and a battery production system, which can realize real-time monitoring of the wear status of the pressing roller. By monitoring the wear status of the surface of the pressing roller in contact with different membrane areas of the pole piece, it is possible to monitor the travel differences of different membrane areas of the pole piece during the rolling process and provide online early warning of the pole ear status.

[0006] In a first aspect, an embodiment of the present application provides a rolling device, comprising:

[0007] A rolling assembly, comprising a supporting roller and a pressing roller for rolling the battery pole piece, wherein the pressing roller is provided with at least two annular protrusions in the axial direction for cooperating with the coating area of ​​the battery pole piece;

[0008] The monitoring component comprises a driven wheel connected to each of the annular protrusions by rolling friction, and a rotation speed sensor for detecting the rotation speed of each of the driven wheels.

[0009] In the first aspect, in some embodiments, the rolling assembly further includes a first driving member disposed at both ends of the pressing roller and used to drive the pressing roller to approach or move away from the supporting roller.

[0010] In the first aspect, in some embodiments, the driving end of the first driving member is provided with a bearing seat adapted to the end bearing of the pressure roller, and the bearing seat includes a base and a cover plate that are detachable from each other.

[0011] In a first aspect, in some embodiments, the base and the cover are fixedly connected by bolts.

[0012] In a first aspect, in some embodiments, the monitoring assembly further includes a mounting seat for rotatably mounting the driven wheel, and a second driving member for driving the mounting seat to approach the annular protrusion.

[0013] In the first aspect, in some embodiments, the rotation speed sensor is mounted on the mounting seat, and a pressure sensor is connected between the second driving member and the mounting seat.

[0014] In the first aspect, in some embodiments, the pressing roller includes a roller shaft and a roller cylinder, and the roller cylinder is detachably provided with a rolling sleeve forming the annular protrusion and a limiting sleeve for axially limiting the rolling sleeve.

[0015] In the first aspect, in some embodiments, the rolling sleeve includes an inner sliding sleeve adapted to the outer diameter of the roller, and an outer rubber sleeve sleeved on the outer periphery of the inner sliding sleeve.

[0016] In the first aspect, in some embodiments, the monitoring component further includes a controller connected to the rotation speed sensor, and an alarm connected to the controller.

[0017] In a second aspect, an embodiment of the present application provides a battery production system, including:

[0018] A rolling device as described in any of the above items.

[0019] The beneficial effects of the technical solution provided by this application include:

[0020] An embodiment of the present application provides a rolling device and a battery production system, a rolling assembly, which includes a supporting roller and a pressing roller for rolling battery pole pieces, and the pressing roller is axially provided with at least two annular protrusions that cooperate with the coating area of ​​the battery pole pieces; a monitoring assembly, which includes a driven wheel that is rolling and frictionally connected to each annular protrusion, and a speed sensor for detecting the speed of each driven wheel.

[0021] Since the driven wheel rotates through the friction force exerted by the annular protrusion, and the friction force is related to the squeezing force of the annular protrusion on the driven wheel, when the annular protrusion wears, it will cause the squeezing force to change, and then cause the friction force to change, resulting in a change in the speed of the driven wheel, which is then detected by the speed sensor.

[0022] Therefore, the embodiment of the present application can detect the rotational speed of each driven wheel through a rotational speed sensor, and then reflect the difference in the degree of wear of each annular protrusion surface on the pressure roller through the difference in the rotational speed of each driven wheel. The difference in the degree of wear affects the difference in the movement of different membrane areas on the pole piece during the rolling process, and thus can indirectly perform monitoring and early warning, assisting the user to quickly determine the cause of the abnormal state of the pole ear, and greatly reducing the breakage of the pole ear and the scrapping of the subsequent processes due to abnormal conditions such as through creases and wrinkles. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A schematic front view of a pressure roller provided in an embodiment of the present application;

[0025] Figure 2 A schematic top view of a support roller provided in an embodiment of the present application;

[0026] Figure 3 A left side schematic diagram of a bearing seat provided in an embodiment of the present application;

[0027] Figure 4 A structural cross-sectional view of a pressure roller provided in an embodiment of the present application;

[0028] Figure 5 A structural cross-sectional view of a rolling sleeve provided in an embodiment of the present application.

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] 1. Pressure roller; 2. Annular protrusion; 3. Driven wheel; 4. Speed ​​sensor; 5. Support roller; 6. First driving member; 7. Bearing seat; 71. Base; 72. Cover plate; 8. Mounting seat; 9. Second driving member; 10. Pressure sensor; 11. Roller shaft; 12. Roller; 13. Roller sleeve; 131. Inner sliding sleeve; 132. Outer rubber sleeve; 14. Limit sleeve. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0032] The embodiments of the present application provide a rolling device and a battery production system, which can realize real-time monitoring of the wear status of the rolling roller. By monitoring the wear status of the rolling roller surface in contact with different membrane areas of the electrode sheet, it is possible to monitor the travel differences of different membrane areas of the electrode sheet during the rolling process and provide online early warning of the electrode sheet status.

[0033] See also Figures 1 to 5 As shown, the first aspect of the embodiment of the present application provides a rolling device, comprising:

[0034] A rolling assembly, comprising a support roller 5 and a pressing roller 1 for rolling a battery pole piece, wherein the pressing roller 1 is provided with at least two annular protrusions 2 along the axial direction for cooperating with the coating area of ​​the battery pole piece;

[0035] The monitoring component includes a driven wheel 3 connected to each annular protrusion 2 by rolling friction, and a rotation speed sensor 4 for detecting the rotation speed of each driven wheel 3.

[0036] The embodiment of the present application provides a rolling device, wherein the rolling assembly of the rolling device includes a support roller 5 and a pressure roller 1, wherein the central axis of the support roller 5 is parallel to the central axis of the pressure roller 1, and the pole piece is rolled between the support roller 5 and the pressure roller 1. For example, the support roller 5 can be a steel roller, and the support roller 5 and the pressure roller 1 jointly extrude the coated pole piece, and the support roller 5 and the pressure roller 1 passively rotate with the transmission of the pole piece.

[0037] The monitoring component of the rolling device of the embodiment of the present application is provided with a driven wheel 3 that cooperates with each annular protrusion 2 on the pressure roller 1. The driven wheel 3 rotates by the friction force applied by the annular protrusion 2, and the friction force is related to the squeezing force of the annular protrusion 2 on the driven wheel 3. Since the relative position of the axis center line of the driven wheel 3 and the axis center line of the annular protrusion 2 is fixed, when the annular protrusion 2 is worn, it will cause the squeezing pressure to change, and further cause the friction force to change, resulting in the rotation speed of the driven wheel 3 to change, which is detected by the rotation speed sensor 4.

[0038] Therefore, the embodiment of the present application can detect the rotational speed of each driven wheel 3 through the rotational speed sensor 4, and reflect the difference in the degree of wear on the surface of each annular protrusion 2 on the pressure roller 1 through the rotational speed difference of each driven wheel 3. When the rotational speed difference of each driven wheel 3 exceeds a certain range, the pressure roller 1 can be replaced in time to avoid the difference in the travel distance of the electrode film area corresponding to different coating areas, which will cause the electrode ear to have a through crease.

[0039] For example, when the surface wear of the annular protrusion 2 on the pressure roller 1 is severe, it can be clearly observed that the annular protrusion 2 is out of contact with the driven wheel 3, and the driven wheel 3 no longer rotates with the pressure roller 1. It can be seen that the surface wear of the annular protrusion 2 on the pressure roller 1 will affect the rotational speed of the driven wheel 3. By monitoring the rotational speed of the driven wheel 3, the surface wear of the annular protrusion 2 on the pressure roller 1 can be indirectly monitored.

[0040] That is, the embodiment of the present application can indirectly monitor the wear state of the surface of the pressure roller 1 by monitoring the rotation speed of each driven wheel 3, and further monitor the travel difference of different film areas of the pole piece during the rolling process and the online early warning of the pole ear state. Exemplarily, the speed sensor 4 can be connected to an external control device. When the rotation speed of each driven wheel 3 changes to a certain extent, the light source controlled by the external control device flashes to remind the staff to check the state of the pole piece. The recorded sensor data can also be transmitted to the query platform to provide a means of tracing after an abnormality occurs.

[0041] In some optional embodiments, see Figures 1 to 5 As shown, an embodiment of the present application provides a rolling device, and the rolling assembly of the rolling device also includes a first driving member 6 arranged at both ends of the pressing roller 1 and used to drive the pressing roller 1 to approach or move away from the supporting roller 5.

[0042] The rolling assembly of the embodiment of the present application further includes a first driving member 6, which can drive the pressing roller 1 to move, thereby adjusting the rolling gap formed by the pressing roller 1 and the supporting roller 5. Exemplarily, the first driving member 6 adopts an electric or hydraulic telescopic cylinder, and is installed at both ends of the pressing roller 1. By controlling the synchronous telescopic movement of the telescopic cylinders at both ends of the pressing roller 1, the rolling gap formed by the pressing roller 1 and the supporting roller 5 can be adjusted to ensure that the thickness of the pole piece after rolling reaches a preset value.

[0043] In some optional embodiments, see Figures 1 to 5 As shown, an embodiment of the present application provides a rolling device, wherein a driving end of a first driving member 6 of the rolling device is provided with a bearing seat 7 adapted to the end bearing of a pressing roller 1, and the bearing seat 7 includes a base 71 and a cover plate 72 which are detachable from each other.

[0044] The driving end of the first driving member 6 of the embodiment of the present application is fixedly mounted with a bearing seat 7, and the bearing seat 7 is adapted to the end bearing of the pressure roller 1, thereby achieving stable support for the pressure roller 1. Furthermore, the bearing seat 7 includes a base 71 and a cover plate 72 that are detachable from each other, so as to facilitate the disassembly and replacement of the pressure roller 1. Exemplarily, the base 71 is fixedly mounted on the first driving member 6, and the base 71 and the cover plate 72 are fixedly connected by bolts. By removing the bolts, the cover plate 72 can be separated from the base 71, and then the worn pressure roller 1 can be taken out and replaced.

[0045] In some optional embodiments, see Figures 1 to 5 As shown, an embodiment of the present application provides a rolling device, wherein the monitoring component of the rolling device further includes a mounting seat 8 for rotatably mounting the driven wheel 3 , and a second driving member 9 for driving the mounting seat 8 to approach the annular protrusion 2 .

[0046] The monitoring component of the embodiment of the present application also includes a mounting seat 8, which is U-shaped. The driven wheel 3 is mounted on the mounting seat 8 through a rotating shaft. The second driving member 9 can adopt an electric or hydraulic telescopic cylinder to conveniently drive the mounting seat 8 close to the pressure roller 1, so that the driven wheel 3 on the mounting seat 8 and the annular protrusion 2 on the pressure roller 1 can achieve rolling friction connection.

[0047] In some optional embodiments, see Figures 1 to 5 As shown, an embodiment of the present application provides a rolling device, in which a rotation speed sensor 4 is mounted on a mounting seat 8 , and a pressure sensor 10 is connected between a second driving member 9 and the mounting seat 8 .

[0048] The speed sensor 4 of the monitoring assembly of the embodiment of the present application is installed on the mounting seat 8, and the speed sensor 4 remains in a constant position relative to the driven wheel 3, so that the second driving member 9 can drive the mounting seat 8 to adjust the position. In addition, a pressure sensor 10 is connected between the second driving member 9 and the mounting seat 8, and the pressure sensor 10 can detect the squeezing force between the driven wheel 3 and the annular protrusion 2, and can adjust the squeezing force between the driven wheel 3 and the annular protrusion 2 in cooperation with the second driving member 9.

[0049] Since the extrusion pressure between the driven wheel 3 and the annular protrusion 2 affects the friction force applied by the annular protrusion 2 to the driven wheel 3, and the friction force affects the rotation speed of the driven wheel 3, before the pressure roller 1 works, it is necessary to cooperate with the pressure sensor 10 and the second driving member 9 to ensure that the extrusion pressure between each driven wheel 3 and the corresponding annular protrusion 2 remains consistent.

[0050] In some optional embodiments, see Figures 1 to 5As shown, an embodiment of the present application provides a rolling device, in which a pressing roller 1 includes a roller shaft 11 and a roller 12, on which a rolling sleeve 13 forming an annular protrusion 2 and a limiting sleeve 14 for axially limiting the rolling sleeve 13 are detachably mounted.

[0051] The pressure roller 1 of the embodiment of the present application includes a roller shaft 11 and a roller 12, the roller 12 is fixedly sleeved on the roller shaft 11, and a limiting sleeve 14 and a rolling sleeve 13 are sleeved on the outside of the roller 12 at intervals. The limiting sleeve 14 is fixed to the roller 12 by a fixing screw. By removing the fixing screw, the limiting sleeve 14 and the rolling sleeve 13 can slide axially from the roller 12, thereby facilitating the replacement of the rolling sleeve 13.

[0052] In some optional embodiments, see Figures 1 to 5 As shown, an embodiment of the present application provides a rolling device, wherein a rolling sleeve 13 of the rolling device includes an inner sliding sleeve 131 adapted to the outer diameter of a roller 12 , and an outer rubber sleeve 132 sleeved on the outer periphery of the inner sliding sleeve 131 .

[0053] The rolling sleeve 13 of the embodiment of the present application includes an inner sliding sleeve 131 and an outer rubber sleeve 132. The inner sliding sleeve 131 is adapted to the outer diameter of the roller 12, so that it can be conveniently slidably installed on the outer periphery of the roller 12 along the axial direction of the roller 12. The outer rubber sleeve 132 is detachably sleeved on the outer peripheral surface of the inner sliding sleeve 131. When the outer rubber sleeve 132 is worn, the outer rubber sleeve 132 can be conveniently replaced in time.

[0054] In some optional embodiments, see Figures 1 to 5 As shown, an embodiment of the present application provides a roller pressing device capable of monitoring the wear status of a pressure roller. The monitoring component of the roller pressing device capable of monitoring the wear status of a pressure roller also includes a controller connected to a rotation speed sensor 4 and an alarm connected to the controller.

[0055] The monitoring component of the embodiment of the present application also includes a controller and an alarm. The controller is connected to the speed sensor 4 signal and can receive the speed signal detected by the speed sensor 4. When the speeds detected by the speed sensors 4 corresponding to the driven wheels 3 are very different, the controller can control the alarm to remind the staff to check the pole piece conveying status through sound or light flashing, and remind the staff to replace the pressure roller 1 in time to avoid abnormal conditions such as through creases, wrinkles, and broken belts on the pole ears.

[0056] See also Figures 1 to 5 As shown, the second aspect of the embodiment of the present application provides a battery production system, including:

[0057] The rolling device of any one of the above embodiments.

[0058] The battery production system of the embodiment of the present application uses a rolling device of any of the above-mentioned embodiments, which can measure the rotation speed of each driven wheel 3 in real time. By monitoring the changes in the rotation speed of each driven wheel 3, it can indirectly monitor and warn the travel differences of different membrane areas of the electrode sheet during the rolling process, thereby assisting the user to quickly determine the cause of the abnormal state of the electrode ear, greatly reducing the breakage of the electrode ear due to abnormal conditions such as through creases and wrinkles, and the scrapping of the subsequent processes.

[0059] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0060] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0061] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A rolling device, characterized in that: include: A rolling assembly, comprising a support roller (5) for rolling a battery pole piece and a pressing roller (1), wherein the pressing roller (1) is provided with at least two annular protrusions (2) in the axial direction for cooperating with the coating area of ​​the battery pole piece; The monitoring component comprises a driven wheel (3) connected to each of the annular protrusions (2) by rolling friction, and a rotation speed sensor (4) for detecting the rotation speed of each of the driven wheels (3).

2. The rolling device according to claim 1, characterized in that: The rolling assembly further comprises a first driving member (6) which is arranged at both ends of the pressing roller (1) and is used to drive the pressing roller (1) to move closer to or away from the supporting roller (5).

3. The rolling device according to claim 2, characterized in that: The driving end of the first driving member (6) is provided with a bearing seat (7) adapted to the end bearing of the pressure roller (1), and the bearing seat (7) comprises a base (71) and a cover plate (72) which are detachable from each other.

4. The rolling device according to claim 3, characterized in that: The base (71) and the cover plate (72) are fixedly connected by bolts.

5. The rolling device according to claim 1, characterized in that: The monitoring assembly further comprises a mounting seat (8) for rotatably mounting the driven wheel (3), and a second driving member (9) for driving the mounting seat (8) to approach the annular protrusion (2).

6. The rolling device according to claim 5, characterized in that: The rotation speed sensor (4) is mounted on the mounting seat (8), and a pressure sensor (10) is connected between the second driving member (9) and the mounting seat (8).

7. The rolling device according to claim 1, characterized in that: The pressing roller (1) comprises a roller shaft (11) and a roller cylinder (12), wherein the roller cylinder (12) is detachably provided with a rolling sleeve (13) for forming the annular protrusion (2), and a limiting sleeve (14) for axially limiting the rolling sleeve (13).

8. The rolling device according to claim 7, characterized in that: The rolling sleeve (13) comprises an inner sliding sleeve (131) adapted to the outer diameter of the roller (12), and an outer rubber sleeve (132) sleeved on the outer circumference of the inner sliding sleeve (131).

9. The rolling device according to claim 1, characterized in that: The monitoring component also includes a controller connected to the rotation speed sensor (4), and an alarm connected to the controller.

10. A battery production system, characterized in that: include: The rolling device according to any one of claims 1 to 9.

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