Foil crease improvement structure

Abstract

The utility model relates to battery technology field discloses a kind of foil wrinkle improvement structures, including two compression mechanisms of relative arrangement, two compression mechanisms are set in the both sides of foil along first direction. Compression mechanism includes the first compression part and the second compression part along second direction setting, and the first compression part and the second compression part have gap for passing through foil between, and the first compression part and the second compression part are respectively with the two side surfaces of blank area of foil abut. Among them, first direction is the width direction of foil, and second direction is the thickness direction of foil. The above-mentioned foil wrinkle improvement structure can avoid the wrinkle of foil in coating process, ensure the yield of foil, reduce production cost.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a foil wrinkle improvement structure. Background Technology

[0002] In the process of making electrode sheets, a paste needs to be coated on the surface of the foil, and then the foil coated with paste is sent into an oven for drying. After the foil is coated with paste, it can be divided into three areas in the width direction: the coating area in the middle and the blank areas on both sides of the coating area. The coating area is the area coated with paste, and the blank areas are the areas not coated with paste.

[0003] For wide foil materials, if the tension is inconsistent between the left and right sides during the transfer process after coating, wrinkles can easily appear in the coated area or the blank area. Wrinkled foil materials need to be replaced immediately and cannot continue to be transferred, which not only affects the yield of foil coating but also increases production costs. Utility Model Content

[0004] To address the aforementioned issues, this invention provides a foil wrinkle improvement structure that can prevent wrinkles from forming on the foil during the coating process, ensuring the yield of the foil and reducing production costs.

[0005] To achieve the above objectives, in one aspect of this utility model, a foil wrinkle improvement structure is provided between the coating station and the drying oven. The foil wrinkle improvement structure includes two pressing mechanisms arranged opposite to each other, and the two pressing mechanisms are arranged on both sides of the foil along a first direction.

[0006] The pressing mechanism includes a first pressing part and a second pressing part arranged along a second direction. There is a gap between the first pressing part and the second pressing part for the foil to pass through. The first pressing part and the second pressing part respectively abut against the two sides of the blank area of ​​the foil to cooperate in pressing the foil.

[0007] Wherein, the first direction is the width direction of the foil, and the second direction is the thickness direction of the foil.

[0008] The above technical solution has the following advantages or beneficial effects: The foil wrinkle improvement structure is positioned between the coating station and the oven. On the path of the foil after coating and during its transfer to the oven, the foil wrinkle structure can press and stretch the foil in its wet film state. Two pressing mechanisms are located on both sides of the foil. The first and second pressing parts press against both sides of the foil's uncoated area. This not only avoids contact between the pressing mechanisms and the coating area of ​​the foil but also provides downward pressure and lateral tensile force to the foil. During the foil transfer process, the foil is less prone to wrinkling under tension, thus improving the foil wrinkling phenomenon. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of an overall structure of the foil wrinkle improvement structure in an embodiment of this utility model;

[0010] Figure 2 This is a schematic diagram of a structure in an embodiment of the present invention where the foil material is improved by foil pleating;

[0011] Figure 3 This is a schematic diagram of one structure of the clamping mechanism in an embodiment of this utility model;

[0012] Figure 4 This is a structural schematic diagram of the clamping mechanism from another angle in an embodiment of this utility model.

[0013] In the picture:

[0014] 10 Foil material; 11 Coating area; 12 Blank area; 100 Pressing mechanism; 110 First pressing part; 120 Second pressing part; 130 Mounting plate; 131 First mounting hole; 132 Second mounting hole; 1321 Notch; 133 Groove; 134 Locking structure; 140 Second mounting base; 150 First mounting base; 160 First drive assembly; 170 Second drive assembly; 171 Turntable; 172 Locking assembly; 200 Guide rod; 300 Mounting structure. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Due to inconsistent tension on both sides, wrinkles appear in the coated or uncoated areas of wide foil during coating, resulting in substandard foil quality and requiring replacement with new foil. Since the foil is in a wet film state before entering the drying oven, it is impossible to improve the wrinkling phenomenon by adding a pressure roller above the foil to provide lateral tension.

[0017] Based on this, the present invention provides a foil wrinkle improvement structure, which can be used to stretch both sides of the foil when the foil is in a wet film state, thereby improving the phenomenon of foil wrinkles.

[0018] refer to Figure 1 and Figure 2The foil wrinkle improvement structure in this embodiment may include two pressing mechanisms 100 arranged opposite each other. The two pressing mechanisms 100 are arranged along a first direction and may be disposed on both sides of the foil 10. The foil 10 may specifically include a coating area 11 and blank areas 12 located on both sides of the coating area 11 along the width direction. Here, the first direction can also be understood as the width direction of the foil 10.

[0019] The clamping mechanism 100 may include a first clamping portion 110 and a second clamping portion 120 disposed along a second direction, with a gap between the first clamping portion 110 and the second clamping portion 120 for the foil 10 to pass through. The second direction can be understood as the thickness direction of the foil 10. In this case, the first clamping portion 110 and the second clamping portion 120 are located on both sides of the foil 10 along the thickness direction, and the first clamping portion 110 and the second clamping portion 120 respectively abut against the upper and lower surfaces of the blank area 12 of the foil 10.

[0020] It is worth mentioning that the foil wrinkle improvement structure in this embodiment is located between the coating station and the oven, that is, the foil 10 is in a wet film state when it passes through the pressing mechanism 100. The first pressing part 110 and the second pressing part 120 respectively contact the blank area 12 of the foil 10 without contacting the coating area 11, which can prevent the pressing mechanism 100 from damaging the coating area 11 of the foil 10.

[0021] In this embodiment, the pressing mechanisms 100 on both sides press the blank areas 12 on both sides of the foil 10. Taking the first pressing part 110 located above the foil 10 and the second pressing part 120 located below the foil 10 as an example, during the transfer of the foil 10, the first pressing part 110 can provide downward pressure on the blank areas 12 of the foil 10, thereby stretching the foil 10 in the length direction, thus preventing wrinkles from appearing in the length direction of the foil 10. In addition, since the blank areas 12 on both sides of the foil 10 are pressed by the pressing mechanisms 100, the pressing mechanisms 100 on both sides can cooperate to provide lateral tensile force on the foil 10, thereby preventing wrinkles from appearing in the width direction of the foil 10. Therefore, the foil wrinkle improvement structure in this embodiment can improve the wrinkle phenomenon of the foil 10 in the wet film state, effectively improve the yield of the foil 10, and thus help reduce production costs.

[0022] In some embodiments, L1 is the dimension of the first pressing part 110 in the first direction, L2 is the dimension of the blank area 12 of the foil 10 in the first direction, and L3 is the dimension of the second pressing part 120 in the first direction. Wherein, L1 is less than L2, and L3 is less than L2. Furthermore, the difference between L1 and L2 is 5mm to 10mm.

[0023] It should be understood that by designing the widths of both the first pressing part 110 and the second pressing part 120 to be smaller than the width of the blank area 12, the first pressing part 110 and the second pressing part 120 can be completely pressed against the foil 10 in the first direction, thereby improving the pressing effect between the first pressing part 110 and the second pressing part 120 and the foil 10, and thus better improving the phenomenon of wrinkles in the foil 10.

[0024] Furthermore, the difference between the width of the first pressing part 110 and the width of the blank area 12 is controlled within the range of 5mm to 10mm, and the difference between the width of the second pressing part 120 and the width of the blank area 12 is also controlled within the range of 5mm to 10mm. If the difference is less than this range, the widths of the first pressing part 110 and the second pressing part 120 are approximately the same as the width of the blank area 12. Since there is a tolerance in the width of the foil 10 during manufacturing, and there is also a tolerance during the assembly of the two pressing mechanisms 100, it is easy for the first pressing part 110 or the second pressing part 120 to come into contact with the coating area 11 of the foil 10, resulting in damage to the foil 10. If the difference is greater than this range, the proportion of the first pressing part 110 and the second pressing part 120 in the blank area 12 in the first direction is relatively small, which is easy to result in poor pressing effect of the first pressing part 110 and the second pressing part 120 on the foil 10, thereby causing wrinkles to appear on the foil 10. Therefore, by controlling the difference within the above range, not only can the pressing mechanism 100 be prevented from contacting the coating area 11 of the foil 10, but the pressing effect of the pressing mechanism 100 on the blank area 12 of the foil 10 can also be guaranteed.

[0025] Furthermore, the dimension of the first pressing part 110 along the first direction can be 8mm to 20mm, and the dimension of the second pressing part 120 along the first direction can also be 8mm to 20mm. If the width of the first pressing part 110 and the second pressing part 120 is less than this range, the contact surface between the first pressing part 110 and the second pressing part 120 and the blank area 12 in the width direction is small, which can easily lead to insufficient pressing force. If the width of the first pressing part 110 and the second pressing part 120 is greater than this range, it is not conducive to controlling the gap between the first pressing part 110 and the second pressing part 120 and the coating area 11 in the first direction. Therefore, controlling the width of the first pressing part 110 and the second pressing part 120 within the above range can not only avoid the pressing mechanism 100 from contacting the coating area 11 of the foil 10, but also ensure the pressing effect of the pressing mechanism 100 on the blank area 12 of the foil 10.

[0026] Specifically, the dimension of the first pressing part 110 along the first direction can be equal to the dimension of the second pressing part 120 along the first direction, and the first pressing part 110 and the second pressing part 120 are aligned in the second direction. In this case, when the foil 10 passes between the first pressing part 110 and the second pressing part 120, the forces on both sides of the foil 10 are balanced, allowing the pressing mechanism 100 to better provide lateral tension to the foil 10, thereby further enhancing the wrinkle-reducing effect of the pressing mechanism 100 on the foil 10.

[0027] As an optional implementation, the first pressing part 110 can be a roller, and the second pressing part 120 can be a roller or a flexible pressure plate. Since the surface of the roller is curved, it can achieve line contact with the foil 10 when pressing it, thereby controlling the contact size of the first pressing part 110 or the second pressing part 120 in the length direction of the foil 10. This can prevent the foil 10 from being pulled in the length direction due to increased resistance during transport when passing through the pressing mechanism 100.

[0028] Similarly, because the flexible pressure plate has a deformation space, when the upper roller presses the foil 10 to be tightly pressed against the flexible pressure plate, the flexible pressure plate can deform, allowing the flexible pressure plate to better fit the foil 10. In this way, the roller and the flexible pressure plate can work together to provide better downward pressure on the foil 10, thereby enhancing the effect of improving the wrinkles of the foil 10.

[0029] In some embodiments, continuing to refer to the figures, the foil wrinkle improvement structure may further include a guide rod 200 extending along a first direction, and two clamping mechanisms 100 may be respectively mounted on the guide rod 200, with the two clamping mechanisms 100 spaced apart. Here, mounting the two clamping mechanisms 100 on the same structure facilitates the symmetrical arrangement of the two clamping mechanisms 100.

[0030] like Figure 1 As shown, there can be two guide rods 200, which can be arranged at intervals along a third direction, which is perpendicular to the first direction and the second direction. The clamping mechanism 100 can be connected to each of the two guide rods 200. In this way, the joint support of the two guide rods 200 can enhance the fixing effect between the clamping mechanism 100 and the guide rods 200. Compared with only one guide rod 200, setting two guide rods 200 can prevent the clamping mechanism 100 from deflecting relative to the guide rod 200 due to external force during the transfer of the foil 10, thus preventing the clamping mechanism 100 from being unable to stretch the foil 10 at the preset angle.

[0031] The guide rod 200 can be connected to the mounting structure 300 at both ends, and the guide rod 200 and the mounting structure 300 are fixedly connected. The mounting structure 300 can be installed on a frame or machine base, thereby fixing the foil wrinkle improvement structure to a preset work position.

[0032] For example, combined Figure 1 and Figure 3 The clamping mechanism 100 may include a mounting plate 130, and both the first clamping part 110 and the second clamping part 120 are disposed on the mounting plate 130. The mounting plate 130 is provided with a first mounting hole 131 and a second mounting hole 132 arranged in a third direction. Two guide rods 200 can pass through the first mounting hole 131 and the second mounting hole 132 respectively to facilitate connection with the mounting plate 130.

[0033] The diameter of the first mounting hole 131 can be the same as the diameter of the guide rod 200, so that after the guide rod 200 passes through the first mounting hole 131, it can contact the inner wall of the first mounting hole 131 to achieve pre-fixation between the mounting plate 130 and the guide rod 200. The diameter of the second mounting hole 132 can be slightly larger than the diameter of the guide rod 200, and the second mounting hole 132 is provided with a notch 1321. The mounting plate 130 is also provided with a groove 133 communicating with the notch 1321. The groove 133 can be used to divide the mounting plate 130 between the opening of the groove 133 and the notch 1321 into two relatively independent parts.

[0034] The mounting plate 130 is also provided with a locking structure 134, which has a locking position and a non-locking position. When the guide rod 200 passes through the second mounting hole 132, the locking structure 134 can be switched to the locking position. At this time, the two parts of the first mounting portion separated by the groove 133 come close to each other, causing the notch 1321 of the second mounting hole 132 to close, thereby abutting the inner wall of the second mounting hole 132 against the guide rod 200 to fix the guide rod 200 to the second mounting hole 132. When it is necessary to separate the mounting plate 130 from the guide rod 200 or to move them relative to each other, the locking structure 134 can be switched to the non-locking position. At this time, the size of the second mounting hole 132 is larger than the diameter of the guide rod 200 to facilitate relative movement between the guide rod 200 and the mounting plate 130. This facilitates the assembly of the clamping mechanism 100 and the guide rod 200.

[0035] Based on this, the spacing between the two pressing mechanisms 100 in this embodiment along the first direction is adjustable. That is, the pressing mechanism 100 can move relative to the guide rod 200 along the first direction in order to meet the stretching requirements of foils 10 of different widths, so as to ensure that the pressing mechanism 100 only contacts the blank area 12 of the foil 10.

[0036] In practice, when it is necessary to move one or both clamping mechanisms 100 relative to the guide rod 200, the locking structure 134 can be switched from the locking position to the non-locking position. At this time, the size of the second mounting hole 132 is larger than the diameter of the guide rod 200, and the mounting plate 130 can move relative to the guide rod 200 in the first direction to adjust the relative position between the mounting plate 130 and the guide rod 200. After adjustment, the locking structure 134 is switched from the non-locking position to the locking position again to fix the guide rod 200 and the mounting plate 130 relative to each other.

[0037] It should be noted that during the process of adjusting the distance between the two pressing mechanisms 100, since the inner wall of the first mounting hole 131 is in contact with the guide rod 200, it can prevent the mounting plate 130 from rotating relative to the guide rod 200 around the axis of the guide rod 200 when adjusting the relative position of the mounting plate 130 and the guide rod 200 in the first direction, thereby ensuring that the foil 10 can move in the horizontal direction when passing through the pressing mechanism 100.

[0038] In some embodiments, the distance between the first pressing part 110 and the second pressing part 120 in the second direction is adjustable to adjust the pressing force on the foil 10 or to adapt to foils 10 of different thicknesses. In this case, the first pressing part 110 can be moved relative to the second pressing part 120 in the second direction, thereby changing the distance between the first pressing part 110 and the second pressing part 120.

[0039] As an optional implementation scheme, it is also referred to. Figure 1 and Figure 4 The clamping mechanism 100 may also include a first drive assembly 160, which is used to drive the first clamping part 110 to move relative to the second clamping part 120 in a second direction, thereby increasing or decreasing the distance between the first clamping part 110 and the second clamping part 120.

[0040] Based on this, the clamping mechanism 100 may further include a first mounting base 150 and a second mounting base 140 arranged along a second direction. The second mounting base 140 is connected to the mounting plate 130, and a first drive assembly 160 is fixed to the second mounting base 140. The drive portion of the first drive assembly 160 is connected to the first mounting base 150. A first clamping part 110 is disposed on the first mounting base 150, and a second clamping part 120 is disposed on the second mounting base 140. When the first clamping part 110 moves relative to the second clamping part 120 along the second direction, the second clamping part 120 remains fixed, and the first drive assembly 160 drives the first mounting base 150 to move along the second direction, thereby adjusting the relative position between the first clamping part 110 and the second clamping part 120.

[0041] For example, the first drive assembly 160 may include a cylinder, which and the second clamping part 120 are disposed on opposite sides of the second mounting base 140 in a first direction, and the second clamping part 120 and the cylinder are respectively fixed to the second mounting base 140. The connecting rod of the cylinder is connected to the first mounting base 150 to drive the first mounting base 150 to move. Alternatively, the first drive assembly 160 may also include a motor, which is fixed to the second mounting base 140, and the output shaft of the motor is connected to the first mounting base 150 to drive the first mounting base 150 to move.

[0042] In addition, when adjusting the distance between the first pressing part 110 and the second pressing part 120, a micrometer can be used to control the movement distance of the first pressing part 110 so that the distance between the first pressing part 110 and the second pressing part 120 can be adjusted more precisely to adapt to different production needs, thereby enhancing the improvement effect on the wrinkles of the foil 10.

[0043] In some embodiments, such as Figure 3 or Figure 4 As shown, the clamping mechanism 100 may further include a second drive assembly 170, which can be used to drive the first clamping part 110 and the second clamping part 120 to rotate as a whole around a rotation axis. Here, the rotation axis can be understood as a straight line parallel to the second direction. When the first clamping part 110 and the second clamping part 120 rotate at a certain angle, the angle between the first clamping part 110, the second clamping part 120 and the foil 10 can be adjusted to meet the stretching requirements of the foil 10.

[0044] As an optional implementation, the second drive assembly 170 may include a turntable 171 and a locking assembly 172, with the first pressing part 110 and the second pressing part 120 both disposed on the turntable 171. Specifically, the turntable 171 may be disposed on the mounting plate 130, and the second mounting base 140 may be fixedly connected to the side of the turntable 171 facing away from the mounting plate 130. In this case, the turntable 171 may rotate relative to the mounting plate 130 around the rotation axis, thereby driving the first pressing part 110 and the second pressing part 120 to rotate synchronously.

[0045] The second drive assembly 170 may further include a drive device, such as a rotary motor, which may be fixedly connected to the mounting plate 130. The rotary motor has a shaft connected to the turntable 171 to drive the turntable 171 to rotate.

[0046] The locking assembly 172 has a first station and a second station. When the locking assembly 172 is in the first station, the turntable 171 can rotate relative to the locking assembly 172 around the rotation axis. When the locking assembly 172 is in the second station, the turntable 171 and the locking assembly 172 are relatively fixed. That is, when the locking assembly 172 is in the first station, the locking assembly 172 is not used to lock the turntable 171; when the locking assembly 172 is in the second station, the locking assembly 172 is used to lock the turntable 171. Thus, when the turntable 171 rotates to a preset angle, the locking assembly 172 limits the turntable 171, preventing it from deflecting due to external force during the transfer of the foil 10 by the turntable 171.

[0047] The locking component 172 can be, for example, a guide rail clamp. When the turntable 171 needs to be rotated, the guide rail clamp disengages from the turntable 171. When the turntable 171 rotates to a preset angle, the guide rail clamp abuts against the turntable 171, thereby achieving a limiting effect on the turntable 171.

[0048] In addition, when adjusting the angles of the first pressing part 110 and the second pressing part 120 by driving the turntable 171 to rotate, a micrometer can be used to control the rotation angle of the turntable 171 so that the first pressing part 110 and the second pressing part 120 can be precisely rotated to a preset angle to adapt to different production needs, thereby enhancing the improvement effect on the wrinkles of the foil 10.

[0049] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this utility model without departing from the spirit and scope of this utility model. Therefore, if these modifications and variations of this utility model fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A foil crease improvement structure characterized by, The foil wrinkle improvement structure is disposed between the coating station and the drying oven. The foil wrinkle improvement structure includes two pressing mechanisms disposed opposite to each other, and the two pressing mechanisms are disposed on both sides of the foil along a first direction. The pressing mechanism includes a first pressing part and a second pressing part arranged along a second direction, with a gap between the first pressing part and the second pressing part for passing through the foil, and the first pressing part and the second pressing part respectively abutting against the two sides of the blank area of ​​the foil; Wherein, the first direction is the width direction of the foil, and the second direction is the thickness direction of the foil.

2. The foil crease improvement structure according to claim 1, characterized by The difference between the dimension L1 of the first pressing part along the first direction and the dimension L2 of the blank area of ​​the foil along the first direction is 5mm to 10mm, wherein L1 < L2; The difference between the dimension L3 of the second pressing part along the first direction and the dimension L2 of the blank area of ​​the foil along the first direction is 5mm to 10mm, wherein L3 < L2.

3. The foil wrinkle improvement structure according to claim 2, characterized in that, The first pressing part has a dimension of 8mm to 20mm along the first direction, and the second pressing part has a dimension of 8mm to 20mm along the first direction.

4. The foil wrinkle improvement structure according to claim 1, characterized in that, The distance between the first pressing part and the second pressing part is adjustable.

5. The foil wrinkle improvement structure according to claim 4, characterized in that, The clamping mechanism further includes a first drive assembly, a second mounting base, and a first mounting base; The second mounting base and the first mounting base are arranged along the second direction, the first clamping part is disposed on the first mounting base, and the second clamping part is disposed on the second mounting base; The first drive component is fixed to the second mounting base and connected to the first mounting base to drive the first mounting base to move relative to the second mounting base in the second direction.

6. The foil wrinkle improvement structure according to claim 1, characterized in that, The clamping mechanism further includes a second drive assembly, which includes a turntable and a drive device; The first pressing part and the second pressing part are disposed on the turntable; The driving device is used to drive the turntable to rotate about a rotation axis, which is parallel to the second direction.

7. The foil wrinkle improvement structure according to claim 6, characterized in that, The second drive component also includes a locking component; The locking assembly has a first station and a second station. When the locking assembly is in the first station, the turntable can rotate relative to the locking assembly around the rotation axis. When the locking assembly is in the second station, the turntable and the locking assembly are relatively fixed.

8. The foil wrinkle improvement structure according to claim 1, characterized in that, The spacing between the two clamping mechanisms along the first direction is adjustable.

9. The foil wrinkle improvement structure according to claim 8, characterized in that, It also includes a guide rod that extends along the first direction; The clamping mechanism is movably mounted on the guide rod in the first direction relative to the guide rod.

10. The foil wrinkle improvement structure according to claim 1, characterized in that, The first pressing part is a roller, and the second pressing part is a roller or a soft pressure plate.

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