Lithium ion battery rolling pole piece thickness consistency adjusting device

Abstract

The utility model discloses a lithium ion battery rolling pole piece thickness consistency adjusting device, which belongs to the technical field of lithium ion batteries, and comprises a mounting frame, the mounting frame is horizontally arranged, an up-down moving structure is arranged on the mounting frame, the up-down moving structure is in sliding fit with the mounting frame, and the up-down moving structure is arranged on the mounting frame. The mounting rack is provided with a thickness adjusting structure, the thickness adjusting structure is rotatably connected with the up-down moving structure, a protective cover for covering the up-down moving structure is arranged beside the mounting rack, and the mounting rack is provided with a thickness detector. According to the utility model, the distance between the roll gaps is changed, so that the thicknesses of the processed battery pole pieces are the same, the consistency of the processing thicknesses of the battery pole pieces is ensured, the operation is simple, and the measurement data of the thickness detector is accurate.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium-ion batteries, and in particular relates to a device for adjusting the thickness consistency of rolled pole pieces of lithium-ion batteries. Background Art

[0002] In lithium-ion battery production, pole pieces are an important component of lithium batteries, and consistency directly affects the electrochemical performance of the battery. Therefore, maintaining the consistency of the pole piece thickness after rolling is an important parameter to ensure that the pole piece performance meets the requirements. Maintaining the consistency of the pole piece thickness after rolling can not only ensure the smoothness of the pole piece surface, but also improve the compaction of the pole piece and the difficulty of inserting the pole piece into the shell. In terms of performance, it improves the consistency of the battery's internal resistance and cycle. During the pole piece rolling production process, it is necessary to constantly monitor the thickness of the pole piece after rolling in order to quickly adjust the processing thickness parameters.

[0003] However, the existing adjustment device is currently unable to adjust the thickness of the electrode during use. If the electrode thickness does not meet the requirements, it will be directly scrapped, which will lead to an increase in the manufacturing cost of the battery cell. Utility Model Content

[0004] The embodiment of the utility model provides a device for adjusting the thickness consistency of rolled-ply electrodes of a lithium-ion battery to solve the problems in the prior art.

[0005] The embodiment of the present utility model adopts the following technical solution: a device for adjusting the thickness consistency of a rolled-film electrode of a lithium-ion battery, comprising a mounting frame, the mounting frame being horizontally arranged, the mounting frame being provided with an up and down movable structure, the up and down movable structure being slidably fitted with the mounting frame, the mounting frame being provided with a thickness adjustment structure, the thickness adjustment structure being rotatably connected to the up and down movable structure, a protective cover being provided on the side of the mounting frame for covering the up and down movable structure, and a thickness detector being provided on the mounting frame.

[0006] Furthermore, the up and down moving structure includes a moving plate, which is slidably connected to the mounting frame, and the moving plate is provided with an upper rotating shaft with a rotation connection, and the upper rotating shaft is provided with an upper rotating roller, and the end of the upper rotating shaft is provided with an upper bevel gear, and the mounting frame is provided with a lower rotating shaft with a rotation connection and the lower rotating shaft is provided with a lower rotating roller, and the lower rotating shaft is provided with a lower bevel gear.

[0007] Furthermore, the up and down moving structure also includes two support frames horizontally arranged on the mounting frame, a rotating rod rotatably connected is provided between the two support frames, a moving motor is provided on the support frame, a belt connected to the rotating rod for transmission is provided on the main shaft of the moving motor, a limiting bar is provided on the rotating rod, a first bevel gear meshed with the upper bevel gear is provided on the rotating rod, the first bevel gear slides with the limiting bar, an extension block rotatably connected to the first bevel gear is provided on the moving plate, and a second bevel gear meshed with the lower bevel gear is also provided on the rotating rod.

[0008] Furthermore, the thickness adjustment structure includes an adjustment motor arranged on a mounting bracket, a first gear is provided on the main shaft of the adjustment motor, a second gear is provided on the mounting bracket for rotational connection, the first gear is engaged with the second gear, a threaded rod is provided on the second gear for threaded connection, and the bottom of the threaded rod is rotationally connected to the movable plate.

[0009] Adjusting the motor to drive the first gear to rotate can drive the second gear to rotate on the mounting frame, thereby driving the threaded rod to rotate, so that the movable plate moves up and down on the mounting frame, thereby driving the position of the upper rotating roller to move, which will change the spacing of the roller gap, so that the thickness of the processed battery pole pieces is the same, ensuring the consistency of the processed thickness of the battery pole pieces, simple operation, and accurate measurement data through the thickness detector, which also improves the processing efficiency.

[0010] Furthermore, the thickness detector includes an upper detection end arranged on the movable plate and a lower detection end arranged on the mounting frame.

[0011] Furthermore, a controller is provided on the protective cover.

[0012] At least one of the above technical solutions adopted in the embodiments of the present invention can achieve the following beneficial effects:

[0013] Firstly, when the utility model adjusts the size of the roller gap between the upper rotating roller and the lower rotating roller, the motor is adjusted to drive the first gear to rotate, which can drive the second gear to rotate on the mounting frame, thereby driving the threaded rod to rotate, so that the movable plate moves up and down on the mounting frame, thereby driving the position of the upper rotating roller to move, which will change the roller gap spacing, so that the thickness of the processed battery pole pieces is the same, ensuring the consistency of the processed thickness of the battery pole pieces, simple operation, and accurate measurement data through the thickness detector, which also improves the processing efficiency.

[0014] Secondly, the mobile motor in the utility model drives the rotating rod on the two support frames through the belt. The rotation of the rotating rod drives the first bevel gear and the second bevel gear to rotate, thereby respectively driving the upper bevel gear and the lower bevel gear to rotate, thereby respectively driving the upper rotating roller to rotate on the moving plate, and the lower rotating roller to rotate on the mounting frame to move the battery electrode forward;

[0015] When adjusting the thickness of the battery electrode, the thickness of the battery electrode fed back by the thickness detector can be used to adjust the gap between the upper rotating roller and the lower rotating roller through the operation of the thickness adjustment structure to ensure the consistency of the thickness of the battery electrode during processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 This is a schematic diagram of the first three-dimensional structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the second three-dimensional structure of the present utility model;

[0019] Figure 3 This is a schematic diagram of the three-dimensional structure of the up-and-down moving structure and the thickness adjustment structure in the present invention;

[0020] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0021] Figure 5 for Figure 3 Enlarged view of point B in the middle;

[0022] Reference numerals

[0023] Mounting frame 1, up and down moving structure 2, moving plate 20, upper rotating shaft 21, upper rotating roller 22, lower rotating shaft 23, lower rotating roller 24, upper bevel gear 25, lower bevel gear 26, supporting frame 27, rotating rod 28, moving motor 29, belt 290, limiting bar 291, first bevel gear 292, second bevel gear 293, extension block 294, thickness adjustment structure 3, adjustment motor 31, first gear 32, second gear 33, threaded rod 34, protective cover 4, controller 5, thickness detector 6, upper detection end 61, lower detection end 62. DETAILED DESCRIPTION

[0024] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will provide a clear and complete description of the technical solutions of the present invention in conjunction with specific embodiments of the present invention and the corresponding drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0025] The technical solutions provided by various embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0026] Reference Figures 1 to 5 As shown, an embodiment of the utility model provides a device for adjusting the thickness consistency of a rolled-film electrode of a lithium-ion battery, comprising a mounting frame 1, wherein the mounting frame 1 is horizontally arranged, and an up-and-down movable structure 2 is provided on the mounting frame 1, and the up-and-down movable structure 2 is slidably fitted with the mounting frame 1, and a thickness adjustment structure 3 is provided on the mounting frame 1, and the thickness adjustment structure 3 is rotatably connected to the up-and-down movable structure 2, and a protective cover 4 is provided on the side of the mounting frame 1 for covering the up-and-down movable structure 2, and a thickness detector 6 is provided on the mounting frame 1.

[0027] Specifically, the up and down moving structure 2 includes a moving plate 20, the moving plate 20 is slidably connected to the mounting frame 1, the moving plate 20 is provided with an upper rotating shaft 21 connected in rotation, the upper rotating shaft 21 is provided with an upper rotating roller 22, the end of the upper rotating shaft 21 is provided with an upper bevel gear 25, the mounting frame 1 is provided with a lower rotating shaft 23 connected in rotation, and the lower rotating shaft 23 is provided with a lower rotating roller 24, and the lower rotating shaft 23 is provided with a lower bevel gear 26; the up and down moving structure 2 also includes two support frames 27 horizontally arranged on the mounting frame 1, the two support frames 27 A rotating rod 28 is provided in rotation therebetween, a moving motor 29 is provided on the support frame 27, a belt 290 is provided on the main shaft of the moving motor 29, and a limiting bar 291 is provided on the rotating rod 28. A first bevel gear 292 meshing with the upper bevel gear 25 is provided on the rotating rod 28, and the first bevel gear 292 slides with the limiting bar 291. An extension block 294 rotatably connected to the first bevel gear 292 is provided on the movable plate 20, and a second bevel gear 293 meshing with the lower bevel gear 26 is also provided on the rotating rod 28.

[0028] When adjusting the thickness of the electrode, the roller gap between the upper rotating roller 22 and the lower rotating roller 24 can be adjusted. By reducing the roller gap, the thickness of the electrode becomes thinner; by increasing the roller gap, the thickness of the electrode becomes thicker. Through precise measurement and calculation, according to the target value of the required electrode thickness, the roller gap can be gradually fine-tuned. The amplitude of each adjustment should not be too large. Generally, it can be adjusted in units of several microns to tens of microns. Then, a trial roll press is performed to measure the thickness of the electrode until the appropriate thickness is reached.

[0029] When in use, the moving motor 29 drives the rotating rod 28 on the two support frames 27 through the belt 290. The rotation of the rotating rod 28 drives the first bevel gear 292 and the second bevel gear 293 to rotate, thereby respectively driving the upper bevel gear 25 and the lower bevel gear 26 to rotate, thereby respectively driving the upper rotating roller 22 to rotate on the moving plate 20, and the lower rotating roller 24 to rotate on the mounting frame 1, thereby moving the battery electrode forward;

[0030] When adjusting the thickness of the battery electrode, the thickness of the battery electrode fed back by the thickness detector 6 can be used to adjust the gap between the upper rotating roller 22 and the lower rotating roller 24 through the operation of the thickness adjustment structure 3 to ensure the consistency of the thickness of the battery electrode during processing.

[0031] When the upper rotating roller 22 is driven to move by the thickness adjustment structure 3, the moving block will drive the position of the extension block 294 to move, thereby driving the upper bevel gear 25 to move on the limit bar 291 on the rotating rod 28, ensuring that when the thickness of the battery electrode is adjusted, the upper rotating roller 22 and the lower rotating roller 24 rotate at the same time to move the battery electrode forward.

[0032] Specifically, the thickness adjustment structure 3 includes an adjustment motor 31 arranged on the mounting frame 1, a first gear 32 is provided on the main shaft of the adjustment motor 31, and a second gear 33 is provided on the mounting frame 1 for rotational connection. The first gear 32 is engaged with the second gear 33, and the second gear 33 is provided with a threaded rod 34 for threaded connection, and the bottom of the threaded rod 34 is rotationally connected to the movable plate 20.

[0033] When adjusting the gap between the upper rotating roller 22 and the lower rotating roller 24, the adjustment motor 31 drives the first gear 32 to rotate, which can drive the second gear 33 to rotate on the mounting frame 1, thereby driving the threaded rod 34 to rotate, so that the movable plate 20 moves up and down on the mounting frame 1, thereby driving the position of the upper rotating roller 22 to move, which will change the gap between the rollers, so that the thickness of the processed battery electrodes is the same, ensuring the consistency of the processed thickness of the battery electrodes, simple operation, and accurate measurement data of the thickness detector 6.

[0034] Specifically, the thickness detector 6 includes an upper detection end 61 arranged on the movable plate 20 and a lower detection end 62 arranged on the mounting frame 1; the model of the thickness detector 6 is LTG-300; the upper detection end 61 and the lower detection end 62 of the thickness detector 6 can respectively detect the upper surface and the lower surface of the battery electrode, and obtain the thickness of the battery electrode by calculation. By utilizing the principle of laser detection, online detection can be realized and the battery electrode thickness data can be fed back in time.

[0035] Specifically, a controller 5 is provided on the protective cover 4; the controller 5 can control the up and down moving structure 2, the thickness adjustment structure 3 and the thickness detector 6, and can monitor and detect the thickness of the electrode in real time so as to adjust the thickness of the electrode to make the thickness of the processed electrode consistent.

[0036] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the claims of the present invention.

Claims

1. A device for adjusting the thickness consistency of a lithium-ion battery roll-pressed electrode sheet, characterized in that: It comprises a mounting frame (1), wherein the mounting frame (1) is arranged horizontally. The mounting frame (1) is provided with an up-and-down moving structure (2), and the up-and-down moving structure (2) is in sliding cooperation with the mounting frame (1). The mounting frame (1) is provided with a thickness adjustment structure (3), and the thickness adjustment structure (3) is rotatably connected to the up-and-down moving structure (2). A protective cover (4) for covering the up-and-down moving structure (2) is provided on the side of the mounting frame (1), and a thickness detector (6) is provided on the mounting frame (1).

2. The device for adjusting thickness uniformity of rolled-on electrodes for lithium-ion batteries according to claim 1, characterized in that: The up-and-down moving structure (2) includes a moving plate (20), and the moving plate (20) is slidably connected to the mounting frame (1). The movable plate (20) is provided with an upper rotating shaft (21) for rotational connection, the upper rotating shaft (21) is provided with an upper rotating roller (22), and the end of the upper rotating shaft (21) is provided with an upper bevel gear (25). A rotatably connected lower rotating shaft (23) is provided on the mounting frame (1), a lower rotating roller (24) is provided on the lower rotating shaft (23), and a lower bevel gear (26) is provided on the lower rotating shaft (23).

3. The device for adjusting thickness uniformity of rolled-on electrodes for lithium-ion batteries according to claim 2, characterized in that: The up-and-down moving structure (2) further comprises two support frames (27) horizontally arranged on the mounting frame (1), and a rotating rod (28) is provided between the two support frames (27) for rotational connection. The support frame (27) is provided with a moving motor (29), and the main shaft of the moving motor (29) is provided with a belt (290) which is connected to the rotating rod (28). The rotating rod (28) is provided with a limit bar (291), the rotating rod (28) is provided with a first bevel gear (292) meshing with the upper bevel gear (25), the first bevel gear (292) is slidably matched with the limit bar (291), and the movable plate (20) is provided with an extension block (294) rotatably connected to the first bevel gear (292). The rotating rod (28) is also provided with a second bevel gear (293) meshing with the lower bevel gear (26).

4. The device for adjusting thickness uniformity of rolled-on electrodes for lithium-ion batteries according to claim 2, characterized in that: The thickness adjustment structure (3) comprises an adjustment motor (31) arranged on the mounting frame (1), a first gear (32) being provided on the main shaft of the adjustment motor (31), The mounting frame (1) is provided with a second gear (33) which is rotatably connected, and the first gear (32) is meshed with the second gear (33). A threaded rod (34) is provided on the second gear (33) and the bottom of the threaded rod (34) is rotatably connected to the movable plate (20).

5. The device for adjusting thickness consistency of rolled-on electrodes for lithium-ion batteries according to claim 2, characterized in that: The thickness detector (6) comprises an upper detection end (61) arranged on the movable plate (20) and a lower detection end (62) arranged on the mounting frame (1).

6. The device for adjusting thickness uniformity of rolled-on electrodes for lithium-ion batteries according to claim 1, characterized in that: A controller (5) is provided on the protective cover (4).

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