Unwinding device and battery production equipment

Abstract

The utility model relates to the technical field of battery production and manufacturing, and discloses an unwinding device and battery production equipment. The unwinding roller is arranged on the base and can move in the axial direction, and the unwinding roller can rotate relative to the base; the deviation rectifying driving structure is suitable for driving the unwinding roller to move in the axial direction, and the driving direction of the deviation rectifying driving structure is coaxial with the axial direction of the unwinding roller; and the rotation driving structure is suitable for driving the unwinding roller to rotate. The unwinding roller is driven by the rotary driving structure to rotate so as to unwind the coiled material belt, the unwinding roller is driven by the deviation rectifying driving structure to move in the axial direction so as to adjust the position of the unwinding roller, and therefore deviation rectifying of the position of the material belt is achieved, and the deviation rectifying efficiency is improved. The driving direction of the deviation rectifying driving structure and the axial direction of the unwinding roller are coaxially arranged, the driving force of the deviation rectifying driving structure can directly act on the unwinding roller in the axial direction, and the deviation rectifying response speed and the deviation rectifying precision of the unwinding roller are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production and manufacturing, in particular to an unwinding device and battery production equipment. Background Art

[0002] In the production process of batteries, an unwinding device is usually used to unwind the rolled pole piece material strips and diaphragm material strips for use in sheet making, lamination or winding. However, the material strips are easily offset during the transmission process, resulting in deviations in the position of the material strips during the processes of sheet making, lamination or winding, affecting the processing accuracy, and further affecting the production efficiency and production quality of the battery. Therefore, the unwinding device in the prior art usually includes a correction mechanism, which is used to adjust the position of the material strip to improve the position accuracy of the material strip. However, in the prior art, the unwinding roller is usually connected to a slide / slider, and a driving component is used to drive the slide / slider to move back and forth in a straight line, so as to adjust the position of the unwinding roller to achieve the adjustment of the position of the material strip. Therefore, in the prior art, the slide / slider is used as a medium to achieve indirect correction of the unwinding roller, and the correction reaction is delayed and the correction accuracy is low. Utility Model Content

[0003] In view of this, the utility model provides an unwinding device and a battery production device to solve the problems of delayed deviation correction reaction and low deviation correction accuracy of the unwinding device in the prior art.

[0004] In the first aspect, the utility model provides an unwinding device, comprising: a base; an unwinding roller, which is arranged on the base and is movable in the axial direction, and the unwinding roller is rotatable relative to the base; a deviation correction drive structure, which is suitable for driving the unwinding roller to move in the axial direction, and the driving direction of the deviation correction drive structure is coaxial with the axial direction of the unwinding roller; and a rotation drive structure, which is suitable for driving the unwinding roller to rotate.

[0005] Beneficial effects: The unwinding roller is driven to rotate by a rotary driving structure so that the unwinding roller can be used to unwind the rolled material strip, and the unwinding roller is driven to move axially by a deviation correction driving structure to adjust the position of the unwinding roller, thereby achieving deviation correction of the position of the material strip, and the driving direction of the deviation correction driving structure is coaxially arranged with the axial direction of the unwinding roller, and the driving force of the deviation correction driving structure can directly act on the unwinding roller along the axial direction, thereby improving the deviation correction response speed and deviation correction accuracy of the unwinding roller.

[0006] In an optional embodiment, the unwinding roller includes a roller body, a spline screw shaft and a spline bearing, the roller body and the spline screw shaft are connected, the spline screw shaft is connected to the base through the spline bearing, the driving end of the correction drive structure is connected to the end of the spline screw shaft or the axis of the roller body so that the spline screw shaft moves axially in the spline bearing, and the rotation drive structure is connected to the roller body or the spline screw shaft so that the spline screw shaft rotates in the spline bearing.

[0007] Beneficial effect: The spline bearing is used to realize two motion modes of the spline screw shaft, rotation and linear movement, which simplifies the overall structure of the unwinding device while ensuring the position accuracy of the roller body and the stability of the motion process.

[0008] In an optional embodiment, the correcting drive structure is located outside the roller body, the fixed end of the correcting drive structure is connected to the base, and the driving end of the correcting drive structure is connected to the end of the spline screw shaft; or, the correcting drive structure is located inside the roller body, the fixed end of the correcting drive structure is connected to the base, and the driving end of the correcting drive structure is connected to the end of the spline screw shaft or the axis of the roller body.

[0009] Beneficial effect: When the deviation-correcting driving structure is arranged inside the roller body, the space occupied by the unwinding device is greatly reduced, thereby improving the space utilization rate.

[0010] In an optional embodiment, the rotary drive structure is located outside the roller body and is drivingly connected to the roller body or the spline screw shaft; or, the rotary drive structure includes a hub motor, the stator of the hub motor is fixedly arranged inside the roller body, the rotor of the hub motor is rotatably arranged outside the stator, and the rotor is connected to the inner wall of the roller body.

[0011] Beneficial effect: When the hub motor is arranged inside the roller body, the space occupied by the unwinding device is greatly reduced, and the space utilization rate is improved.

[0012] In an optional embodiment, the unwinding roller includes a roller body and a sleeve, the sleeve is slidably connected to the base, the roller body and the sleeve are rotatably connected, the roller body and the sleeve are coaxially arranged, the driving end of the correction drive structure is connected to the axis of the roller body or the axis of the sleeve so that the sleeve slides axially on the base, and the rotation drive structure is drivingly connected to the roller body.

[0013] Beneficial effect: The correction drive structure is used to drive the roller or the sleeve, so that the sleeve slides axially relative to the base, so that the roller moves axially for correction. The rotary drive structure is used to drive the roller to rotate, that is, the roller rotates relative to the sleeve, so as to unwind.

[0014] In an optional embodiment, the deflection correction drive structure is located outside the roller body, the fixed end of the deflection correction drive structure is connected to the base, and the driving end of the deflection correction drive structure is connected to the axis of the sleeve; or, the deflection correction drive structure is located inside the roller body, the fixed end of the deflection correction drive structure is connected to the base, and the driving end of the deflection correction drive structure is connected to the axis of the sleeve or the axis of the roller body.

[0015] Beneficial effect: When the deviation-correcting driving structure is arranged inside the roller body, the space occupied by the unwinding device is greatly reduced, thereby improving the space utilization rate.

[0016] In an optional embodiment, the rotary drive structure is located outside the roller body and is drivingly connected to the roller body; or, the rotary drive structure includes a hub motor, the stator of the hub motor is fixedly arranged inside the roller body, the rotor of the hub motor is rotatably arranged outside the stator, and the rotor is connected to the inner wall of the roller body.

[0017] Beneficial effect: When the hub motor is arranged inside the roller body, the space occupied by the unwinding device is greatly reduced, and the space utilization rate is improved.

[0018] In an optional embodiment, the unwinding device further includes a detection unit, wherein the detection unit is suitable for detecting a position of the material strip, and the detection unit is electrically connected to the deviation correction drive structure.

[0019] Beneficial effect: The position of the material belt is detected by setting a detection unit, and the deviation correction drive structure makes deviation correction adjustments to the unwinding roller according to the detection result of the detection unit, thereby ensuring the accuracy of the deviation correction.

[0020] In an optional embodiment, the unwinding device further includes a passing roller, and the passing roller is arranged parallel to the unwinding roller.

[0021] Beneficial effect: The material belt is supported by setting the roller, which facilitates the transmission of the material belt.

[0022] In a second aspect, the utility model also provides a battery production device, including the above-mentioned unwinding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of the overall structure of an unwinding device according to an embodiment of the utility model;

[0025] Figure 2 for Figure 1 A front view of the unwinding device shown;

[0026] Figure 3 It is a schematic diagram of the overall structure of another unwinding device according to an embodiment of the utility model;

[0027] Figure 4 for Figure 3 A front view of the unwinding device shown;

[0028] Figure 5 This is a front view of another unwinding device according to an embodiment of the utility model;

[0029] Figure 6 for Figure 5 A front cross-sectional view of the unwinding device shown.

[0030] Description of reference numerals:

[0031] 1. Base; 11. Base plate; 12. First mounting seat; 13. Second mounting seat; 14. Fixed seat; 15. Sliding shaft; 2. Unwinding roller; 21. Roller body; 22. Spline screw shaft; 23. Sliding sleeve; 3. Correction drive structure; 4. Rotation drive structure; 41. Stator; 42. Rotor; 5. Detection unit; 6. Roller; 7. Connecting column. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0033] Combine the following Figures 1 to 6 , describing an embodiment of the utility model.

[0034] According to an embodiment of the utility model, on the one hand, a reeling device is provided, comprising: a base 1, a reeling roller 2, a deviation correction drive structure 3 and a rotation drive structure 4. The reeling roller 2 is arranged on the base 1 and is movable in the axial direction, and the reeling roller 2 is rotatable relative to the base 1. The deviation correction drive structure 3 is suitable for driving the reeling roller 2 to move in the axial direction, and the driving direction of the deviation correction drive structure 3 is coaxial with the axial direction of the reeling roller 2; the rotation drive structure 4 is suitable for driving the reeling roller 2 to rotate.

[0035] The unwinding roller 2 is driven to rotate by the rotating driving structure 4, so that the unwinding roller 2 can be used to unwind the rolled material strip, and the unwinding roller 2 is driven to move axially by the deviation correction driving structure 3 to adjust the position of the unwinding roller 2, thereby realizing the deviation correction of the position of the material strip, and the driving direction of the deviation correction driving structure 3 is coaxially arranged with the axial direction of the unwinding roller 2, and the driving force of the deviation correction driving structure 3 can directly act on the unwinding roller 2 along the axial direction, thereby improving the deviation correction response speed and the deviation correction accuracy of the unwinding roller 2.

[0036] It is worth mentioning that in the related art, the indirect connection between the deviation correction drive structure 3 and the unwinding roller 2 is achieved through a slide / slider, which usually causes a deviation between the driving direction of the deviation correction drive structure 3 and the axial direction of the unwinding roller 2, so that when the deviation correction drive structure 3 is driven, a torque is formed between the deviation correction drive structure 3 and the unwinding roller 2, resulting in the unwinding roller 2 being unable to move accurately along the axial direction, thus affecting the deviation correction accuracy.

[0037] In a first embodiment, if Figures 1 to 4 As shown, the unwinding roller 2 includes a roller body 21, a spline screw shaft 22 and a spline bearing. The roller body 21 and the spline screw shaft 22 are connected and arranged. The spline screw shaft 22 is connected to the base 1 through the spline bearing. The driving end of the deviation correction drive structure 3 is connected to the end of the spline screw shaft 22 or the axis of the roller body 21, so that the spline screw shaft 22 moves axially in the spline bearing. The rotation drive structure 4 is connected to the roller body 21 or the spline screw shaft 22 in a transmission manner so that the spline screw shaft 22 rotates in the spline bearing. The spline bearing is used to realize the two motion modes of the spline screw shaft 22, namely, rotation and linear movement. While simplifying the overall structure of the unwinding device, the position accuracy of the roller body 21 and the stability of the motion process are ensured.

[0038] In a first embodiment, if Figures 1 to 4 As shown, the deflection-correcting driving structure 3 is located outside the roller body 21 , the fixed end of the deflection-correcting driving structure 3 is connected to the base 1 , and the driving end of the deflection-correcting driving structure 3 is connected to the end of the spline screw shaft 22 .

[0039] Specifically, in the first embodiment, if Figures 1 to 4As shown, the base 1 includes a substrate 11, a first mounting seat 12 and a second mounting seat 13. The first mounting seat 12 and the second mounting seat 13 are both arranged on the substrate 11 and are relatively spaced apart. The spline bearing is arranged in the first mounting seat 12 so that the spline screw shaft 22 passes through the first mounting seat 12. The first end of the spline screw shaft 22 is connected to the roller body 21, the fixed end of the correcting drive structure 3 is connected to the second mounting seat 13, and the driving end of the correcting drive structure 3 is connected to the second end of the spline screw shaft 22.

[0040] Of course, in other alternative embodiments, the deflection correction drive structure 3 can be arranged inside the roller body 21, the fixed end of the deflection correction drive structure 3 is connected to the base 1, and the driving end of the deflection correction drive structure 3 is connected to the end of the spline screw shaft 22 or the axis of the roller body 21. When the deflection correction drive structure 3 is arranged inside the roller body 21, the space occupied by the unwinding device is greatly reduced, and the space utilization rate is improved.

[0041] In a first embodiment, if Figure 1 and Figure 2 As shown, the rotary drive structure 4 is located outside the roller body 21 and is drivingly connected to the spline screw shaft 22. Specifically, the rotary drive structure 4 includes a servo motor and a chain drive assembly or a belt drive assembly to drive the spline screw shaft 22 to rotate, thereby driving the roller body 21 to rotate.

[0042] As an alternative embodiment, the rotary driving structure 4 may also directly drive the roller body 21 .

[0043] Of course, in other alternative embodiments, such as Figure 3 and Figure 4 As shown, the rotary drive structure 4 includes a wheel hub motor (see Figure 6 ), the stator 41 of the hub motor is fixedly arranged inside the roller body 21, and the rotor 42 of the hub motor is rotatably arranged outside the stator 41, and the rotor 42 is connected to the inner wall of the roller body 21. When the hub motor is arranged inside the roller body 21, the space occupied by the unwinding device is greatly reduced, and the space utilization rate is improved.

[0044] In a second embodiment, if Figure 5 and Figure 6As shown, the unwinding roller 2 includes a roller body 21 and a sleeve 23, the sleeve 23 is slidably connected to the base 1, the roller body 21 is rotatably connected to the sleeve 23, the roller body 21 and the sleeve 23 are coaxially arranged, the driving end of the deviation correction driving structure 3 is connected to the axis of the roller body 21 or the axis of the sleeve 23, so that the sleeve 23 slides axially on the base 1, and the rotary driving structure 4 is drivingly connected to the roller body 21. The deviation correction driving structure 3 drives the roller body 21 or the sleeve 23 to make the sleeve 23 slide axially relative to the base 1, so that the roller body 21 moves axially for deviation correction, and the rotary driving structure 4 drives the roller body 21 to rotate, that is, the roller body 21 rotates relative to the sleeve 23, so as to perform unwinding.

[0045] In a second embodiment, if Figure 6 As shown, the deflection correction drive structure 3 is located inside the roller body 21, the fixed end of the deflection correction drive structure 3 is connected to the base 1, and the driving end of the deflection correction drive structure 3 is connected to the axis of the roller body 21. When the deflection correction drive structure 3 is arranged inside the roller body 21, the space occupied by the unwinding device is greatly reduced, and the space utilization rate is improved.

[0046] As an alternative implementation, the driving end of the deviation-correcting driving structure 3 may also be connected to the axis of the sliding sleeve 23 .

[0047] Of course, in other alternative embodiments, the deflection correction drive structure 3 may be located outside the roller body 21 , with the fixed end of the deflection correction drive structure 3 connected to the base 1 , and the driving end of the deflection correction drive structure 3 connected to the axis of the sleeve 23 .

[0048] In a second embodiment, if Figure 6 As shown, the rotary drive structure 4 includes a hub motor, a stator 41 of the hub motor is fixedly arranged inside the roller body 21, a rotor 42 of the hub motor is rotatably arranged outside the stator 41, and the rotor 42 is connected to the inner wall of the roller body 21. When the hub motor is arranged inside the roller body 21, the space occupied by the unwinding device is greatly reduced, and the space utilization rate is improved.

[0049] Of course, in other alternative embodiments, the rotary drive structure 4 may be disposed outside the roller body 21 and be transmission-connected to the roller body 21 .

[0050] It is worth mentioning that please refer to Figure 6 The roller body 21 is a hollow structure, the deviation-correcting driving structure 3 and the wheel hub motor are both located inside the roller body 21 (the hollow part), the fixed end of the deviation-correcting driving structure 3 is connected to the base 1 through the connecting column 7, the connecting column 7 is arranged through the stator 41, and when the roller body 21 moves in the axial direction, the stator 41 moves along the connecting column 7. Of course, an additional connecting structure can also be provided to connect the stator 41 with the base 1, so that the stator 41 or the base 1 can be movably arranged in the axial direction relative to the connecting structure.

[0051] In a second embodiment, if Figure 6 As shown, the base 1 includes a fixed seat 14 and a sliding shaft 15 . The sliding shaft 15 is disposed on the fixed seat 14 , and the sliding sleeve 23 is slidably sleeved outside the sliding shaft 15 .

[0052] In one embodiment, Figures 1 to 4 As shown, the unwinding device further includes a detection unit 5, which is suitable for detecting the position of the material belt, and the detection unit 5 is electrically connected to the deviation correction drive structure 3. The detection unit 5 is set to detect the position of the material belt, and the deviation correction drive structure 3 performs deviation correction adjustment on the unwinding roller 2 according to the detection result of the detection unit 5, thereby ensuring the accuracy of the deviation correction.

[0053] In one embodiment, the detection unit 5 is a fiber optic sensor or a fiber optic distance meter.

[0054] In one embodiment, Figures 1 to 4 As shown, the unwinding device further includes a roller 6, which is arranged parallel to the unwinding roller 2. The roller 6 is arranged to support the material belt, so as to facilitate the transmission of the material belt.

[0055] In one embodiment, the deflection correction driving structure 3 is a linear motor, the fixed end of the deflection correction driving structure 3 is the body of the linear motor, and the driving end of the deflection correction driving structure 3 is the driving shaft of the linear motor.

[0056] Of course, in other alternative implementations, the deviation-correcting drive structure 3 may also be a drive cylinder or other components.

[0057] According to an embodiment of the present invention, on the other hand, a battery production device is provided, comprising the unwinding device mentioned above.

[0058] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A reeling device, characterized in that: include: Base (1); An unwinding roller (2) is arranged on the base (1) and is movable in the axial direction; the unwinding roller (2) is rotatable relative to the base (1); A deviation-correcting driving structure (3) adapted to drive the unwinding roller (2) to move axially, the driving direction of the deviation-correcting driving structure (3) being coaxially arranged with the axial direction of the unwinding roller (2); The rotary drive structure (4) is suitable for driving the unwinding roller (2) to rotate.

2. The unwinding device according to claim 1, characterized in that: The unwinding roller (2) comprises a roller body (21), a spline screw shaft (22) and a spline bearing, wherein the roller body (21) and the spline screw shaft (22) are connected to each other, the spline screw shaft (22) is connected to the base (1) via the spline bearing, the driving end of the deviation correction drive structure (3) is connected to the end of the spline screw shaft (22) or the axis of the roller body (21) so that the spline screw shaft (22) moves axially in the spline bearing, and the rotation drive structure (4) is transmission-connected to the roller body (21) or the spline screw shaft (22) so that the spline screw shaft (22) rotates in the spline bearing.

3. The unwinding device according to claim 2, characterized in that: The deflection correction drive structure (3) is located outside the roller body (21), the fixed end of the deflection correction drive structure (3) is connected to the base (1), and the driving end of the deflection correction drive structure (3) is connected to the end of the spline screw shaft (22); or, The deflection correction drive structure (3) is located inside the roller body (21), the fixed end of the deflection correction drive structure (3) is connected to the base (1), and the driving end of the deflection correction drive structure (3) is connected to the end of the spline screw shaft (22) or the axis of the roller body (21).

4. The unwinding device according to claim 2, characterized in that: The rotary drive structure (4) is located outside the roller body (21) and is drivingly connected to the roller body (21) or the spline screw shaft (22); or, The rotary drive structure (4) comprises a wheel hub motor, wherein a stator (41) of the wheel hub motor is fixedly arranged inside the roller body (21), a rotor (42) of the wheel hub motor is rotatably arranged outside the stator (41), and the rotor (42) is connected to the inner wall of the roller body (21).

5. The unwinding device according to claim 1, characterized in that: The unwinding roller (2) comprises a roller body (21) and a sliding sleeve (23); the sliding sleeve (23) is slidably connected to the base (1); the roller body (21) and the sliding sleeve (23) are rotatably connected; the roller body (21) and the sliding sleeve (23) are coaxially arranged; the driving end of the deviation correction drive structure (3) is connected to the axis of the roller body (21) or the axis of the sliding sleeve (23) so that the sliding sleeve (23) slides axially on the base (1); and the rotation drive structure (4) is transmission-connected to the roller body (21).

6. The unwinding device according to claim 5, characterized in that: The deflection-correcting driving structure (3) is located outside the roller body (21), the fixed end of the deflection-correcting driving structure (3) is connected to the base (1), and the driving end of the deflection-correcting driving structure (3) is connected to the axis of the sliding sleeve (23); Or, The deflection-correcting driving structure (3) is located inside the roller body (21), the fixed end of the deflection-correcting driving structure (3) is connected to the base (1), and the driving end of the deflection-correcting driving structure (3) is connected to the axis of the sleeve (23) or the axis of the roller body (21).

7. The unwinding device according to claim 5, characterized in that: The rotary drive structure (4) is located outside the roller body (21) and is drivingly connected to the roller body (21); or, The rotary drive structure (4) comprises a wheel hub motor, wherein a stator (41) of the wheel hub motor is fixedly arranged inside the roller body (21), a rotor (42) of the wheel hub motor is rotatably arranged outside the stator (41), and the rotor (42) is connected to the inner wall of the roller body (21).

8. The unwinding device according to any one of claims 1 to 7, characterized in that: The unwinding device further comprises a detection unit (5), wherein the detection unit (5) is suitable for detecting the position of the material strip, and the detection unit (5) is electrically connected to the deviation correction drive structure (3).

9. The unwinding device according to any one of claims 1 to 7, characterized in that: The unwinding device further comprises a passing roller (6), and the passing roller (6) is arranged parallel to the unwinding roller (2).

10. A battery production device, characterized in that: The unwinding device comprises the unwinding device according to any one of claims 1 to 9.

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