Rotary roller gap self-adaption device and pole piece rolling device

Abstract

The utility model provides a roller gap self-adaptive device and a pole piece rolling device. The roller gap self-adaptive device comprises at least one adjuster for adjusting the position of a roller of the pole piece roller structure; each regulator comprises a servo motor, a sensor, a fixing support and a pressing rod. The fixing supports are fixed to the corresponding supporting frames, the servo motors are fixed to the fixing supports, one ends of the pressing rods are fixed to the output ends, and the other ends of the pressing rods are fixed to rotating roller fixing shafts of the rotating rollers. The sensor is used for detecting the position of the auxiliary rotating roller; the servo motor drives the pressing rod to drive the corresponding rotating roller to move so as to adjust the rotating roller gap of the pole piece rotating roller structure.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery electrode manufacturing, in particular to a roller gap self-adapting device and a pole piece rolling device used for lithium battery electrode manufacturing. Background Art

[0002] Coating and rolling are key processes in the production of lithium-ion battery pole pieces, which have a direct impact on the thickness of the pole piece coating and the consistency of the thickness of the pole piece coating in the width direction. In addition, during production, the gap between the rollers is adjusted to control the amount of coating or the thickness of the pole piece through the surface density and thickness detection of the coating head, coating tail and rolling tail. Figure 1 The figure shows a schematic diagram of the pole piece rolling structure.

[0003] However, during high-speed production, hundreds of meters of production are often required from the issuance of the electrode dressing / thickness test results, adjustment of the roller gap to controlling the electrode dressing / thickness within the target range, resulting in fluctuations in the electrode dressing / thickness and poor production consistency. Utility Model Content

[0004] The main purpose of the utility model is to provide a roller gap adaptive device to solve the problems of electrode material / thickness fluctuation and poor production consistency during the electrode coating process, so that the thickness of the electrode auxiliary material can be timely controlled and adjusted.

[0005] To achieve the above-mentioned purpose, the utility model provides a roller gap adaptive device for a pole piece roller structure, wherein the pole piece roller structure comprises a main roller and an auxiliary roller, wherein the main roller and the auxiliary roller are fixed on a support frame; and comprises at least one regulator for adjusting the position of a roller of the pole piece roller structure; wherein each regulator comprises a servo motor, a sensor, a fixed bracket and a pressure rod; the fixed bracket is fixed on the corresponding support frame, the servo motor is fixed on the fixed bracket, the output direction of the output end of the servo motor is consistent with the direction of the processing gap of the pole piece roller structure, one end of the pressure rod is fixed to the output end, and the other end is fixed to the roller fixed shaft of the roller; the sensor is used to detect the position of the auxiliary roller; the servo motor and the sensor are electrically connected to an internal or external controller, and the servo motor drives the pressure rod to drive the corresponding roller to move under the control of the controller to adjust the rolling gap of the pole piece roller structure.

[0006] Furthermore, a cutting plane platform is prefabricated on the fixed shaft of the rotating roller, and the end of the pressure rod is fixed to the rotating roller at the cutting plane platform.

[0007] Furthermore, the fixing bracket is provided with a through hole for the pressure rod to pass through.

[0008] Furthermore, a gap is reserved between the through hole and the pressure rod.

[0009] Furthermore, the sensor measures the distance from a specific end face of the servo motor to an end face cutting platform of a rotating roller fixed shaft of the rotating roller.

[0010] Furthermore, there are two regulators, including a left regulator and a right regulator.

[0011] Furthermore, the sensor of the left regulator measures the distance from a specific end face of the servo motor to the end face cutting platform of the rotating roller fixed axis of the rotating roller, and the sensor of the right regulator measures the distance from a specific end face of the servo motor to the end face cutting platform of the rotating roller fixed axis of the rotating roller, which are used together to judge the horizontality of the rotating roller.

[0012] Furthermore, the sensor also detects the distance from a specific end surface of the servo motor to the fixed axis of the rotating shaft of another rotating roller, which is used to determine the relative parallelism of the main and auxiliary rotating rollers.

[0013] Furthermore, it also includes a pole piece thickness test sensor for detecting the thickness of the processed dressing pole piece.

[0014] The utility model also provides a pole piece rolling device, wherein the pole piece roller structure comprises a main roller and an auxiliary roller, wherein the main roller and the auxiliary roller are fixed on a support frame; and further comprises a roller gap adaptive device as described in any one of the above items.

[0015] In this embodiment, the roller gap self-adaptation device can achieve the goal of roller gap self-adaptation by starting the servo motor 301 to drive the pressure rod to rise or fall according to the data detected by the sensor and / or the electrode thickness test sensor through an internal or external controller. The roller gap self-adaptation device can be controlled by PLC. After adjustment and verification, unmanned production can be realized, and the response time is 100ms, which can quickly collect, determine, make decisions and optimize process parameters, realize the closed loop of electrode dressing / thickness process data and improve production efficiency; at the same time, due to the self-adaptation of the roller gap, the electrode dressing / thickness uniformity and consistency can be timely and effectively improved, thereby reducing the production deviation and manufacturing cost of the electrode and the entire battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 is a schematic diagram of a pole piece roller structure in the background art;

[0018] Figure 2 It is a structural schematic diagram of a roller gap adaptive device for a pole piece roller structure in one embodiment of the utility model;

[0019] Figure 3 yes Figure 2 A schematic structural diagram of the roller gap adaptive device from another perspective;

[0020] Figure 4 yes Figure 2 A schematic diagram of the local structure of the roller gap adaptive device;

[0021] Figure 5 The figure is a schematic diagram of the relative position between the pole piece thickness test sensor 5 and the pole piece of the roller gap adaptive device in one embodiment of the utility model.

[0022] The purpose, features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0023] The technical solution in this embodiment will be described clearly and completely below in conjunction with the drawings in this embodiment. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] It should be noted that all directional indications in this embodiment (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In the present invention, unless otherwise clearly defined and limited, the terms "connection", "fixation", "setting", etc. should be understood in a broad sense. For example, "fixation" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0028] Please combine Figures 1 to 5 As shown, a roller gap adaptive device 3 for a pole piece roller structure 1 is provided in one embodiment of the utility model.

[0029] The pole piece roller structure 1 includes a main roller 101 and an auxiliary roller 102; the dressing pole piece 2 is processed through the processing gap between the main roller 101 and the auxiliary roller 102. The main roller 101 and the auxiliary roller 102 are fixed on the support frame 4, and the support frame 4 includes a left support frame (not numbered in the figure) and a right support frame (not numbered in the figure) arranged oppositely, and the pole piece roller structure 1 is accommodated between the left support frame and the right support frame.

[0030] In a specific embodiment, the roller gap adaptive device 3 can be used to adjust the position of the auxiliary roller 102, thereby adjusting the processing gap between the main roller 101 and the auxiliary roller 102. In other embodiments, the roller gap adaptive device 3 can simultaneously adjust the positions of the main roller 101 and the auxiliary roller 102, thereby adjusting the gap between the main roller 101 and the auxiliary roller 102.

[0031] The roller gap adaptive device 3 is arranged on the support frame 4 and is located above the auxiliary roller 102, and is used to adjust the position of the auxiliary roller 102. The roller gap adaptive device 3 includes a left regulator 31 and a right regulator 32. Specifically, the roller gap adaptive device 3 can be set on one side (only the left regulator 31 or only the right regulator 32 is set); it can be understood that for a larger pole piece roller structure 1, regulators are preferably set on both the left and right sides. Among them, the structures of the left regulator 31 and the right regulator 32 are exactly the same, and only the left regulator 31 is described below.

[0032] The left regulator 31 includes a servo motor 301, a sensor 302, a fixed bracket 303 and a pressure rod 304. The fixed bracket 303 is fixed on the corresponding left support frame, the servo motor 301 is fixed on the fixed bracket 303, the output direction of the output end of the servo motor 301 is consistent with the direction of the processing gap of the pole piece roller structure 1, one end of the pressure rod 304 is fixed to the output end, and the other end is fixed to the rotating roller fixed shaft of the auxiliary roller 102; the sensor 302 is used to detect the position of the auxiliary roller 102; the servo motor 301 and the sensor 302 are electrically connected to an internal or external controller, and under the control of the controller, the servo motor 301 drives the pressure rod 304 to drive the auxiliary roller 102 to move, so as to adjust the rolling gap of the pole piece roller structure.

[0033] It is understandable that the roller gap adaptive device 3 in this embodiment may also include or connect other electronic and mechanical components necessary for realizing various functions, such as a communication module and a power module, and those skilled in the art may set them as needed. Based on the servo motor 301, the sensor 302, the fixed bracket 303, and the pressure rod 304 and their various connection relationships and functions disclosed in this application, those skilled in the art may realize various functions of this application according to the existing technical conditions in the prior art; other implicit technical features of this application that are the same as those in the prior art will not be described in detail here.

[0034] In this embodiment, a cutting plane table 1021 is prefabricated on the rotating roller fixing shaft of the auxiliary rotating roller 102 , and the end of the pressing rod 304 is fixed to the auxiliary rotating roller 102 at the cutting plane table 1021 .

[0035] The roller gap adaptive device 3 is driven by a servo motor 301 to meet the micron-level adjustment requirements to adjust the reduction and expansion of the processing gap of the pole piece roller structure 1.

[0036] Further, in a preferred embodiment, the sensor 302 measures the distance D11 from the servo motor 301 to the two end surface cutting plane 1021 of the fixed shaft of the auxiliary roller 102. Specifically, the distance from the specific end surface or position of the servo motor 301 (generally determined by the position of the sensor 302) to the two end surface cutting plane 1021 of the fixed shaft of the auxiliary roller 102 is measured; for example, it is known that the distance from the measuring end of the sensor 302 to the center of the servo motor 301 is the initial value h. Since the servo motor 301 and the sensor 302 are fixed in position, by setting the initial value h, the detected D11 can be converted into the distance between the servo motor 301 and the auxiliary roller 102. If the main rotating roller 101 adopts a fixed position, the processing gap value can be converted according to the value of D11. The specific calculation method only needs to set the position of the main rotating roller 101 and the initial position of the sensor 302 in advance, and the conversion can be performed according to the radius of the main and auxiliary rollers, the position of the main rotating roller 101 and the position of the sensor 302.

[0037] Preferably, in this embodiment, the left regulator 31 and the right regulator 32 are used at the same time, and the sensor 302 of the left regulator 31 can also measure the distance D11 from the specific end face of the servo motor 301 to the cutting plane 1021 of the end face of the rotating roller fixed shaft of the auxiliary rotating roller 102, and the sensor 302 of the right regulator 32 can measure the distance D12 from the specific end face of the servo motor 301 to the cutting plane 1021 of the end face of the rotating roller fixed shaft of the main rotating roller 101. The values ​​of D11 and D12 can be used to determine the horizontality of the auxiliary rotating roller 102.

[0038] Preferably, the sensor 302 is also used to detect the distance D21 from the specific end surface of the servo motor 301 to the rotating shaft fixed axis 1011 of the main rotating roller 101. The relative parallelism of the main and auxiliary rotating rollers can be determined by combining D11 and D21. Similarly, the data of the left regulator 31 and the right regulator 32 can also be combined to determine the horizontality of the main rotating roller 101.

[0039] Those skilled in the art will appreciate that the sensor 302 may use a plurality of specific sensor probes to achieve detection of a plurality of positions, mainly by arranging a plurality of sensor probes to achieve the above-mentioned distance measurement, and the specific implementation method will not be repeated in this application.

[0040] In a preferred embodiment, the fixed bracket 303 is fixed to the support frame 4, and a through hole is provided on the fixed bracket 303 for the pressure rod 304 to pass through. A gap is reserved between the through hole and the pressure rod 304. This prevents the fixed bracket 303 from being slightly deformed when the pressure rod 304 pushes the rotating roller fixed axis of the auxiliary rotating roller 102, resulting in abnormal fluctuations in the measurement results of the distance sensor 302.

[0041] Preferably, when adjusting the horizontality, the left adjuster 31 and the right adjuster 32 can generate an adjusting movement by one of the left adjuster 31 and the right adjuster 32. When adjusting the machining gap between the main and auxiliary rollers, the left adjuster 31 and the right adjuster 32 are synchronously controlled.

[0042] Preferably, in one embodiment, a pole piece thickness test sensor 5 is also included to detect the thickness of the processed dressing pole piece 2, so as to timely monitor the change of the pole piece dressing / thickness after coating and rolling.

[0043] Preferably, the electrode thickness test sensor 5 is symmetrically located at the same height on both sides of the support frame 4; preferably, the electrode thickness test sensor 5 respectively tests the thickness values ​​T11, T12, T13, T21, T22, T23 of multiple points in the area of ​​20mm on both edges of the electrode to obtain the average thickness values ​​T1M and T2M of the edges on both sides. Figure 5 shown.

[0044] Preferably, the electrode thickness test sensor 5 tests the thickness mean values ​​T1M and T2M of the edges of the electrode on the discharge side to determine whether the process requirements are met and decide whether to start the roller gap adaptation device 3; further, start the servo motor 301 to drive the pressure rod 304 to rise or fall, thereby achieving the goal of roller gap adaptation.

[0045] In this embodiment, the roller gap self-adapting device 3 can achieve the goal of roller gap self-adaptation by starting the servo motor 301 to drive the pressure rod 304 to rise or fall according to the data detected by the sensor 302 and / or the electrode thickness test sensor 5 through an internal or external controller. The roller gap self-adapting device 3 can be controlled by PLC. After adjustment and verification, unmanned production can be realized, and the response time is 100ms, which can quickly collect, determine, make decisions and optimize process parameters, realize the closed loop of electrode dressing / thickness process data and improve production efficiency; at the same time, due to the self-adaptation of the roller gap, the electrode dressing / thickness uniformity and consistency can be timely and effectively improved, thereby reducing the production deviation and manufacturing cost of the electrode and the entire battery cell.

[0046] The utility model also provides a pole piece rolling device, wherein the pole piece roller structure comprises a main roller and an auxiliary roller, wherein the main roller and the auxiliary roller are fixed on a support frame; and further comprises a roller gap adaptive device as described in any one of the above items.

[0047] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the protection scope of the present invention.

Claims

1. A roller gap adaptive device, used for a pole piece roller structure, the pole piece roller structure comprises a main roller and an auxiliary roller, the main roller and the auxiliary roller are fixed on a support frame; It is characterized in that The invention comprises at least one regulator for adjusting the position of the rotating roller of the pole piece roller structure; wherein each regulator comprises a servo motor (301), a sensor (302), a fixed bracket (303) and a pressure rod (304); the fixed bracket (303) is fixed on a corresponding support frame, the servo motor (301) is fixed on the fixed bracket (303), the output direction of the output end of the servo motor (301) is consistent with the direction of the processing gap of the pole piece roller structure, one end of the pressure rod (304) is fixed to the output end, and the other end is fixed to the rotating roller fixed shaft of the roller; the sensor (302) is used to detect the position of the auxiliary roller (102); the servo motor (301) and the sensor (302) are electrically connected to an internal or external controller, and the servo motor (301) drives the pressure rod (304) to drive the corresponding roller to move so as to adjust the rolling gap of the pole piece roller structure.

2. The roller gap adaptive device according to claim 1, It is characterized in that A cutting plane platform (1021) is prefabricated on the rotating roller fixed shaft, and the end of the pressing rod (304) is fixed to the rotating roller at the cutting plane platform (1021).

3. The roller gap adaptive device according to claim 1, It is characterized in that The fixing bracket (303) is provided with a through hole for the pressing rod (304) to pass through.

4. The roller gap self-adapting device according to claim 3, It is characterized in that A gap is reserved between the through hole and the pressure rod (304).

5. The roller gap self-adapting device according to claim 2, It is characterized in that The sensor (302) is used to measure the distance from a specific end surface of the servo motor (301) to the cutting plane table (1021) of the rotating roller fixed axis of the rotating roller.

6. The roller gap self-adapting device according to any one of claims 1 to 5, It is characterized in that There are two regulators, including a left regulator (31) and a right regulator (32).

7. The roller gap self-adapting device according to claim 6, It is characterized in that The sensor (302) of the left regulator (31) measures the distance from a specific end face of the servo motor (301) to the cutting plane table (1021) of the fixed axis of the rotating roller of the rotating roller, and the sensor (302) of the right regulator (32) measures the distance from a specific end face of the servo motor (301) to the cutting plane table (1021) of the fixed axis of the rotating roller of the rotating roller, and they are used together to determine the horizontality of the rotating roller.

8. The roller gap self-adapting device according to claim 1, It is characterized in that The sensor (302) also detects the distance from a specific end surface of the servo motor (301) to the fixed axis of the rotating shaft of another rotating roller, so as to determine the relative parallelism of the main and auxiliary rotating rollers.

9. The roller gap self-adapting device according to claim 1, It is characterized in that It also includes a pole piece thickness testing sensor (5) for detecting the thickness of the processed dressing pole piece.

10. A pole piece rolling device, wherein the pole piece roller structure comprises a main roller and an auxiliary roller, and the main roller and the auxiliary roller are fixed on a support frame; It is characterized in that It also includes a roller gap adaptive device as described in any one of claims 1-9.

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