Pole lug flattening device and pole piece laminating machine
By designing a polar ear smoothing device with adjustment components, the problem that the guide sheet cannot effectively smooth out the polar ear after the roll diameter changes in the prior art, and the effect of improving the cell yield in the battery cell production process is achieved.
Patent Information
- Application Number
- CN202421571887.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-07-04
AI Technical Summary
After the coil diameter of the existing rotating roller changes, the guide sheet cannot effectively smooth out the electrode, resulting in a decrease in the battery cell yield.
An extreme ear smoothing device is designed, including a first and a second mounting base, an extreme ear guide plate, a rotating roller and an adjustment assembly. The adjustment assembly drives the electrode guide plate to rotate through the preset angle and axis to adapt to the changes in the feed angle of the material belt, ensuring that the electrode can still be effectively smoothed when entering the smoothing channel.
By driving the rotation of the pole ear guide plate by the adjustment component, the optimal contact angle of the pole ear can be maintained when the roll diameter changes, ensuring that the pole ear is effectively smoothed when entering the smoothing channel, thereby improving the yield of the battery cell.
Smart Images
Figure CN222778636U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery production, and in particular to a pole lug smoothing device and a pole piece stacking machine. Background Art
[0002] In the process of producing lithium battery cells on a stacking machine, the flatness and integrity of the tabs have an important impact on the quality of the cells. Due to space limitations, the tabs must flow between multiple rollers at high speed from the material roll to the cell forming. The surrounding airflow can easily cause the tabs to fold. In order to prevent the tabs from folding or being damaged, the tab guide plates and rollers are usually set at a fixed angle so that the tabs have a clear path when passing through the roller surface, which reduces the impact on the tabs and smoothes the pre-folded tabs. Among them, the tab guide assembly of the rotating roller after unwinding plays a key role in the quality of the cell tabs.
[0003] The inventors have found that in some existing rotating roller tab smoothing devices, the tab guide plates are fixed on a support seat at a certain angle. However, as the roll diameter of the material roll continues to decrease, the angle at which the tab of the material strip enters the guide plates changes. The guide plates are unable to smooth the tabs, which can easily lead to a decrease in the yield of the battery cells. Utility Model Content
[0004] The utility model aims to provide a tab smoothing device, which can ensure that after the roll diameter of the material roll changes, the guide sheet can still smooth the tab of the material strip to ensure the yield of the battery cell.
[0005] The embodiment of the utility model is achieved as follows:
[0006] In a first aspect, the utility model provides a tab smoothing device, comprising:
[0007] a first mounting seat;
[0008] A second mounting seat, the second mounting seat is rotatably arranged on the first mounting seat around a preset axis;
[0009] A tab guide piece, the tab guide piece is mounted on the first mounting seat;
[0010] A rotating roller, wherein a smoothing channel for a feeding belt to pass through is provided between the rotating roller and the tab guide plate;
[0011] The adjusting component is connected to the second mounting seat and the first mounting seat. When the feeding angle of the material strip changes by a first preset angle along a preset direction, the adjusting component is used to drive the tab guide plate to rotate by a second preset angle around a preset axis along a preset direction.
[0012] In an optional embodiment, the adjustment assembly includes a pre-pressing roller, a rotating ring, a clamping ring, a retaining ring and a constant force elastic member. The pre-pressing roller is mounted on the second mounting seat and is used to press the side of the material belt away from the rotating roller. The clamping ring is mounted on the first mounting seat and can rotate along a preset axis relative to the first mounting seat. The rotating ring is sleeved on the clamping ring and can rotate with the clamping ring. The first mounting seat and the retaining ring are mounted on the rotating ring. The constant force elastic member is connected to the retaining ring, and the constant force elastic member is also connected to the rotating ring.
[0013] In an optional embodiment, the constant force elastic member is a constant force coil spring.
[0014] In an optional embodiment, the first mounting seat is provided with a mounting shaft having a bearing, the clamping ring is arranged on the mounting shaft through the bearing, the axis of the mounting shaft is a preset axis, and the preset axis is coaxial with the axis of the pre-pressing roller.
[0015] In an optional embodiment, the tab guide plate includes a pressing portion, a smoothing channel is provided between the pressing portion and the rotating roller, the smoothing channel has a feeding end and a discharging end, and the arc center of the pressing portion is located on the axis of the rotating roller.
[0016] In an optional embodiment, the tab guide piece further includes a guide portion connected to one end of the pressing portion, the guide portion is close to the feed end, and the guide portion is bent in a direction away from the rotating roller.
[0017] In an optional embodiment, the guide portion is connected to the pressing portion by an arc transition.
[0018] In an optional embodiment, the tab guide piece further includes a relief portion connected to the other end of the pressing portion, the relief portion is close to the discharge end, and the relief portion is bent in a direction away from the rotating roller.
[0019] In an optional embodiment, the avoidance portion is connected to the pressing portion by an arc transition.
[0020] In a second aspect, the utility model provides a pole piece stacking machine, comprising a material strip smoothing device according to any one of the aforementioned embodiments.
[0021] The beneficial effect of the embodiment of the utility model is: the embodiment of the utility model provides a tab smoothing device and a tab stacking machine. The tab stacking machine includes a tab smoothing device, which includes a first mounting seat, a second mounting seat, a tab guide plate, a rotating roller and an adjustment component. The second mounting seat is rotatably arranged on the first mounting seat around a preset straight line, the tab guide plate is mounted on the first mounting seat, and a smoothing channel for the material supply belt to pass through is provided between the rotating roller and the tab guide plate. The adjustment component is connected to the second mounting seat and the first mounting seat. When the material belt feeding angle changes along a preset direction by a first preset angle, the adjustment component is used to drive the tab guide plate to rotate along a preset direction around a preset axis by a second preset angle. In other words, when the winding diameter of the material roll changes, the adjustment component can ensure that the tab of the material belt can still be smoothed by the tab guide plate and the rotating roller when entering the smoothing channel, so as to ensure the yield of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0023] Figure 1 A schematic diagram of the state of the tab smoothing device after the roll diameter of the material roll provided in an embodiment of the utility model changes.
[0024] Icons: 1-ear lug smoothing device; 200-second mounting seat; 300-ear lug guide plate; 310-pressing part; 320-guiding part; 330-avoiding part; 400-rotating roller; 500-adjusting assembly; 510-pre-pressing roller; 520-rotating ring; 530-holding ring; 540-retaining ring; 550-constant force elastic member; 2-material roll; 3-material strip. DETAILED DESCRIPTION
[0025] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0028] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply 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 utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0029] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0030] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0031] The specific structure of a tab smoothing device 1 provided by an embodiment of the utility model and the corresponding technical effects thereof are described in detail below in conjunction with the patent drawings.
[0032] Please refer to Figure 1 The embodiment of the utility model provides a tab smoothing device 1 including a first mounting seat (not shown in the figure), a second mounting seat 200 , a tab guide sheet 300 , a rotating roller 400 and an adjusting assembly 500 .
[0033] The second mounting seat 200 is rotatably arranged on the first mounting seat around a preset straight line, and the pole lug guide plate 300 is installed on the first mounting seat. A smoothing channel for the feeding belt 3 to pass through is provided between the rotating roller 400 and the pole lug guide plate 300, that is, after the material belt 3 passes through the smoothing channel, the pre-folded pole lug can be smoothed. The adjustment component 500 is pre-connected with the second mounting seat 200 and the first mounting seat. When the feeding angle of the material belt 3 changes by a first preset angle along a preset direction, the adjustment component 500 is used to drive the pole lug guide plate 300 to rotate by a second preset angle around a preset axis along a preset direction.
[0034] It can be understood that in the process of continuous stacking of the material strip 3 on the material roll 2, the roll diameter of the material roll 2 will continue to decrease. After the reduction, the feeding angle of the material strip 3 will change, that is, the angle at which the material strip 3 enters the smoothing channel will continue to change. In the present embodiment, when the feeding angle of the material strip 3 changes by a first preset angle along a preset direction, the adjustment component 500 can drive the tab guide plate 300 to rotate by a second preset angle along a preset direction, and then after the roll diameter of the material roll 2 changes, the adjustment component 500 can also enable the tab guide plate 300 to smooth the tab. That is to say, when the roll diameter of the material roll 2 changes, the adjustment component 500 can ensure that the tab of the material strip 3 can still be smoothed by the tab guide plate 300 and the rotating roller 400 when entering the smoothing channel, so as to ensure the yield of the battery cell.
[0035] In this embodiment, the first preset angle is the same as the second preset angle. It should be noted that the same here is not limited to the same in a strict sense, as long as they are substantially the same. Of course, in some other embodiments, the first preset angle is different from the second preset angle.
[0036] In detail, the adjustment assembly 500 includes a pre-pressing roller 510, a rotating ring 520, a clamping ring 530, a retaining ring 540 and a constant force elastic member 550. The pre-pressing roller 510 is installed on the second mounting seat 200 and is used to press the side of the material belt 3 away from the rotating roller 400. The clamping ring 530 is installed on the first mounting seat and can rotate along a preset axis relative to the first mounting seat. The rotating ring 520 is sleeved on the clamping ring 530 and can rotate with the clamping ring 530. The first mounting seat and the retaining ring 540 are installed on the rotating ring 520. The constant force elastic member 550 is connected to the retaining ring 540, and the constant force elastic member 550 is also connected to the rotating ring 520. In this embodiment, the constant force elastic member 550 is a constant force coil spring.
[0037] It is easy to understand that the pre-pressing roller 510 is responsible for preliminarily pressing the material strip 3 (usually the lithium battery material strip 3 coated with active material) before entering the next process to ensure that the material strip 3 is flat, reduce wrinkles or bubbles, and improve the accuracy and quality of subsequent processing. The tab guide sheet 300 is used to guide and position the tab (i.e., the metal sheet on the material strip 3, used to connect with other parts of the battery) to ensure that the tab is accurately aligned with other components of the battery during assembly.
[0038] The rotating ring 520, the guide piece mounting block, the retaining ring 540 and the constant force coil spring together form a linkage system. When the compression force on the constant force coil spring changes, it will apply a torque to the rotating ring 520 through the retaining ring 540, causing the rotating ring 520 and the guide piece mounting block and the tab guide piece 300 thereon to rotate together.
[0039] Since the force of the constant force coil spring is designed to be consistent with the rotation direction, when the coil diameter decreases, the restoring force provided by the constant force coil spring causes the entire assembly (including the tab guide piece 300) to rotate in one direction, and the rotation angle matches the angle change caused by the reduction of the coil diameter. In this way, the tab guide piece 300 can always maintain the best contact angle with the tab, and the tab can be correctly introduced and positioned even if the coil diameter changes.
[0040] The constant force coil spring installed on the retaining ring 540 is designed to provide a constant reverse force. The function of this force is to automatically adjust the pressure of the pre-pressing roller 510 on the material strip 3 as the diameter of the stack changes, so as to maintain the uniformity and consistency of the pressure.
[0041] When the winding diameter of the material strip 3 decreases and the angle of the pole lug entering the guide plate changes accordingly, due to the force provided by the constant force winding spring and the cooperation of the rotating mechanism, the pre-stressing roller 510, the pole lug guide plate 300 and its mounting block, and the retaining ring 540 can rotate synchronously, changing with the change of the stack diameter to maintain the best contact with the pole lug, so that precise guidance and surface smoothing can be achieved in the process of the pole lug entering the guide plate, so that the pole lug of the material strip 3 can be smoothed by the pole lug guide plate 300 and the rotating roller 400 after entering the smoothing channel, thereby improving production efficiency and product quality.
[0042] Through such a design, the constant force coil spring not only maintains the appropriate clamping force on the material strip 3, but also ensures the dynamic adaptation of the tab guide plate 300, ensures that the tab can be effectively guided when entering the guide plate, reduces dislocation and damage, and ensures that the tab can be smoothed under the action of the tab guide plate 300 and the rotating roller 400, so as to ensure the yield of the battery cell obtained in the subsequent process.
[0043] Optionally, the first mounting seat is provided with a mounting shaft having a bearing, the clamping ring 530 is provided on the mounting shaft through the bearing, the axis of the mounting shaft is a preset axis, and the preset axis is coaxial with the axis of the pre-pressing roller 510 .
[0044] The tab guide plate 300 includes a pressing portion 310, and a smoothing channel is provided between the pressing portion 310 and the rotating roller 400. The smoothing channel has a feed end and a discharge end. The material strip 3 enters from the feed end of the smoothing channel and flows out from the discharge end. The arc center of the pressing portion 310 is located on the axis of the rotating roller 400. That is to say, the material strip 3 can be better pressed by the pressing portion 310 and the outer peripheral surface of the rotating roller 400.
[0045] The pole ear guide plate 300 also includes a guide portion 320 connected to one end of the pressing portion 310, and the guide portion 320 is close to the feeding end. The guide portion 320 is bent in a direction away from the rotating roller 400, that is, through the guide portion 320, it is convenient for the material strip 3 to enter the smoothing channel, and the guide portion 320 is a smooth curved surface, which can also prevent the material strip 3 from being scratched by the guide portion 320.
[0046] The guide portion 320 and the pressing portion 310 are connected in an arc transition, and the arc transition connection can avoid stress concentration between the guide portion 320 and the pressing portion 310 .
[0047] The tab guide plate 300 also includes an avoidance portion 330 connected to the other end of the pressing portion 310. The avoidance portion 330 is close to the discharge end. The avoidance portion 330 is bent in a direction away from the rotating roller 400. The avoidance portion 330 avoids the material strip 3 after it flows out of the discharge end of the smoothing channel to ensure that the material strip 3 flows out smoothly.
[0048] The avoidance portion 330 is connected to the pressing portion 310 by an arc transition. Similarly, the arc transition connection can avoid stress concentration between the guide portion 320 and the pressing portion 310, so as to ensure the service life of the tab guide piece 300.
[0049] It should be noted that the tab guide piece 300 is detachably connected to the second mounting seat 200 , and the detachable connection can be connected by threaded fasteners.
[0050] The embodiment of the utility model further provides a pole piece stacking machine, which includes the above-mentioned pole tab smoothing device 1. It should be noted that since the pole piece stacking machine includes the above-mentioned pole tab smoothing device 1, the pole tab smoothing device 1 has the same beneficial effects as the pole piece stacking machine, and therefore, the beneficial effects of the pole piece stacking machine will not be described in detail here.
[0051] In summary, the embodiment of the utility model provides a tab smoothing device 1 and a tab stacking machine. The tab stacking machine includes a tab smoothing device 1, which includes a first mounting seat, a second mounting seat 200, a tab guide plate 300, a rotating roller 400 and an adjusting assembly 500. The second mounting seat 200 is rotatably arranged on the first mounting seat around a preset straight line, the tab guide plate 300 is mounted on the first mounting seat, and a smoothing channel for the feed belt 3 to pass through is provided between the rotating roller 400 and the tab guide plate 300. The adjusting assembly 500 is connected to the second mounting seat 200 and the first mounting seat. When the feeding angle of the material belt 3 changes by a first preset angle along a preset direction, the adjusting assembly 500 is used to drive the tab guide plate 300 to rotate by a second preset angle around a preset axis along a preset direction. After the winding diameter of the material roll 2 changes, the adjusting component 500 can also enable the pole tab guide plate 300 to smooth the pole tab. That is to say, when the winding diameter of the material roll 2 changes, the adjusting component 500 can ensure that the pole tab of the material strip 3 can still be smoothed by the pole tab guide plate 300 and the rotating roller 400 when entering the smoothing channel, so as to ensure the yield of the battery cell.
[0052] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A tab smoothing device, characterized in that: include: a first mounting seat; A second mounting seat, the second mounting seat being rotatably disposed on the first mounting seat around a preset axis; A tab guide piece, the tab guide piece is mounted on the first mounting seat; A rotating roller, wherein a smoothing channel for a feed belt to pass through is provided between the rotating roller and the tab guide plate; An adjustment component is connected to the second mounting seat and the first mounting seat. When the material strip feeding angle changes by a first preset angle along a preset direction, the adjustment component is used to drive the tab guide plate to rotate by a second preset angle around the preset axis along the preset direction.
2. The tab smoothing device according to claim 1, characterized in that: The adjustment assembly includes a pre-pressing roller, a rotating ring, a clamping ring, a retaining ring and a constant force elastic member. The pre-pressing roller is mounted on the second mounting seat and is used to press the side of the material strip away from the rotating roller. The clamping ring is mounted on the first mounting seat and can rotate along the preset axis relative to the first mounting seat. The rotating ring is sleeved on the clamping ring and can rotate with the clamping ring. The first mounting seat and the retaining ring are mounted on the rotating ring. The constant force elastic member is connected to the retaining ring, and the constant force elastic member is also connected to the rotating ring.
3. The tab smoothing device according to claim 2, characterized in that: The constant force elastic member is a constant force coil spring.
4. The tab smoothing device according to claim 2, characterized in that: The first mounting seat is provided with a mounting shaft, the mounting shaft has a bearing, the clamping ring is arranged on the mounting shaft through the bearing, the axis of the mounting shaft is a preset axis, and the preset axis is coaxial with the axis of the pre-pressing roller.
5. The tab smoothing device according to claim 1, characterized in that: The tab guide plate includes a pressing portion, a smoothing channel is provided between the pressing portion and the rotating roller, the smoothing channel has a feeding end and a discharging end, and the arc center of the pressing portion is located on the axis of the rotating roller.
6. The tab smoothing device according to claim 5, characterized in that: The tab guide sheet further comprises a guide portion connected to one end of the pressing portion, the guide portion is close to the feeding end, and the guide portion is bent in a direction away from the rotating roller.
7. The tab smoothing device according to claim 6, characterized in that: The guide portion is connected to the pressing portion by an arc transition.
8. The tab smoothing device according to claim 6, characterized in that: The tab guide piece further comprises a relief portion connected to the other end of the pressing portion, the relief portion is close to the discharge end, and the relief portion is bent in a direction away from the rotating roller.
9. The tab smoothing device according to claim 8, characterized in that: The avoidance portion is connected to the pressing portion by an arc transition.
10. A pole piece lamination machine, characterized in that: It comprises the strip smoothing device as described in any one of claims 1 to 9.