Bilateral slitting mechanism for pole piece and pole lug of lithium battery

Abstract

The utility model relates to a lithium battery pole piece and pole lug bilateral slitting mechanism which comprises two sets of slitting devices symmetrically arranged in the breadth direction of a pole piece material belt, and the two sets of slitting devices conduct slitting operation on pole lugs on the two sides of the pole piece material belt. The slitting device comprises a first cutter and a second cutter, the first cutter is arranged above the second cutter, a pole piece material belt moves between the first cutter and the second cutter, the second cutter is connected with a cutter setting assembly, the cutter setting assembly drives the second cutter to move linearly so as to adjust the distance between the first cutter and the second cutter, a dust suction cover is arranged on the outer side of the second cutter, and the dust suction cover is connected with the first cutter and the second cutter. And the dust collection cover is connected with the waste material box through a pipeline so as to suck the tab waste material cut by the first cutter and the second cutter into the waste material box. The two groups of cutting devices are used for simultaneously cutting edges of tabs on two sides of a pole piece material belt, the position of the second cutter is adjusted through the cutter setting assembly, the distance between the first cutter and the second cutter is adjusted according to the sizes of different pole pieces, and the edge cutting effect is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery pole piece production technical field especially relates to a lithium battery pole piece tab double -sided slitting mechanism. BACKGROUND

[0002] In the production process of the lithium battery pole piece, the pole piece needs to be coated, rolled, slitted, and sheeted, coating is to coat the slurry on the current collector and dry, the peeling strength of the electrode material on the pole piece and the current collector is low, the adhesion strength of the electrode material and the current collector foil can be enhanced through the subsequent rolling process, the quality of the pole piece is improved, and the pole piece is slitted into a corresponding width according to the size requirement of the battery after the electrode material is compacted through the rolling process. In the rolling process, the pole ear needs to be trimmed, the pole ear that needs to be trimmed is the area on the current collector without coating the electrode material, the pole ear is thinner than the area with the electrode material, the pole ear is prone to wrinkling in the rolling process, the probability and degree of wrinkling are reduced by cutting off the pole ear on both sides of the pole piece, and at the same time, burrs on the edge of the pole piece can also be removed. The trimming device of the existing rolling process uses an art knife to trim the single side pole ear of the pole piece, the trimming quality is unstable, the trimming efficiency is low, at the same time, the waste material collected by trimming is unreasonable, and the pole ear waste is stacked on the rolling equipment due to the too fast running speed of the machine, which affects the rolling operation. SUMMARY

[0003] In order to solve the defects of the prior art, the utility model provides a lithium battery pole piece tab double -sided slitting mechanism.

[0004] The utility model provides a lithium battery pole piece tab double -sided slitting mechanism, including two groups of slitting devices that are symmetrically arranged along the width direction of pole piece material belt, two groups of slitting devices carry out slitting operation to the pole ear on both sides of pole piece material belt, slitting device includes first cutter and second cutter, first cutter sets up on the second cutter, pole piece material belt travels between first cutter and second cutter, second cutter is connected with the cutter assembly, the cutter assembly drives second cutter to move linearly to adjust the interval between first cutter and second cutter, second cutter outside is equipped with dust cover, dust cover is connected with waste box through pipeline to inhale the pole ear waste that is cut down by first cutter and second cutter into waste box.

[0005] In some embodiments, the first cutter is a pneumatic slitting cutter mounted on the vertical plate through the guide rail.

[0006] In some embodiments, the tool setting assembly comprises a tool setting shaft, a mounting plate, a tool setting screw rod and a tool setting slide rail, the mounting plate is fixed with the dust cover to form a dust collection chamber, the tool setting shaft is rotatably arranged on the mounting plate, the second cutter is mounted on the tool setting shaft at one end of the dust collection chamber, the mounting plate is slidably connected with the tool setting slide rail through a sliding block, a screw nut on the tool setting screw rod is fixed with the mounting plate, the tool setting screw rod drives the mounting plate and the second cutter to move along the tool setting slide rail, and the tool setting shaft is drivingly connected with a driving motor.

[0007] In some embodiments, the second cutter is a circular cutter coaxially arranged on the tool setting shaft.

[0008] In some embodiments, the tool setting shaft is coaxially arranged with a first spacer sleeve, the second cutter, a guide sleeve and a second spacer sleeve in sequence, the guide sleeve is arranged on the side of the second cutter close to the first cutter, the diameter of the guide sleeve is smaller than that of the first spacer sleeve and the second spacer sleeve, and the diameter of the second cutter is larger than that of the first spacer sleeve and the second spacer sleeve.

[0009] In some embodiments, the upper side of the dust cover is provided with an opening, the part of the second cutter above the opening cuts the tab material belt, and the cut tab waste falls into the dust cover from the opening.

[0010] In some embodiments, the driving motor is drivingly connected with the tool setting shaft through a speed reducer, and the speed reducer is fixedly connected with the mounting plate.

[0011] In some embodiments, the tool setting screw rod is provided with a handle at the end.

[0012] In some embodiments, the tool setting screw rod and the tool setting slide rail are arranged in parallel on the support seat, and the tool setting slide rail is provided with limit blocks at both ends.

[0013] In some embodiments, the waste box is mounted on the waste transfer vehicle.

[0014] Compared with the prior art, the tool setting assembly adjusts the position of the second cutter, adjusts the distance between the first cutter and the second cutter according to different sizes of the tab, ensures the effect of the edge cutting, and realizes the recycling of the tab waste while dusting. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic view of a three-dimensional structure of a lithium battery tab double-edge slitting mechanism according to an embodiment of the present application.

[0016] Figure 2It is the stereogram structure schematic view of the lithium battery pole piece tab double edge slitting mechanism of the embodiment of the application.

[0017] Figure 3 It is the front view structure schematic view of the lithium battery pole piece tab double edge slitting mechanism of the embodiment of the application.

[0018] Figure 4 It is the partial structure schematic view of the lithium battery pole piece tab double edge slitting mechanism of the embodiment of the application.

[0019] Figure 5 It is the stereogram structure schematic view of the waste transfer trolley of the embodiment of the application.

[0020] Reference signs: 1, slitting device;

[0021] 2, first cutter; 21, guide rail; 22, vertical plate;

[0022] 3, second cutter;

[0023] 4, cutter alignment assembly; 41, cutter alignment shaft; 42, mounting plate; 43, cutter alignment screw rod; 44, cutter alignment sliding rail; 45, sliding block; 46, screw rod nut; 47, handle;

[0024] 5, driving motor; 51, speed reducer;

[0025] 6, guide sleeve; 61, first spacer sleeve; 62, second spacer sleeve;

[0026] 7, dust cover; 71, pipeline; 72, opening;

[0027] 8, support seat; 81, limiting block;

[0028] 9, waste box; 91, waste transfer trolley; 92, material pressing machine. DETAILED DESCRIPTION

[0029] The specific implementation manners of the utility model are introduced with reference to the drawings.

[0030] Reference Figure 1 , the drawing is the stereogram structure schematic view of the lithium battery pole piece tab double edge slitting mechanism, the whole mechanism is small in width, can be well set between the material rollers of the roller pressing equipment, under the traction and support of the material roller, the pole piece material belt has a certain tension, the pole piece material belt passes between the two groups of slitting devices 1, the two side tabs of the pole piece material belt are cut by the two groups of slitting devices 1, the tab waste formed by cutting is sucked into the dust cover 7, and is collected into the waste box 9 through the pipeline 71.

[0031] Reference Figures 1 to 5A lithium battery electrode tab double-sided cutting mechanism includes two sets of cutting devices 1 symmetrically arranged along the width direction of the electrode strip. The two sets of cutting devices 1 perform cutting operations on the tabs on both sides of the electrode strip. The cutting device 1 includes a first cutter 2 and a second cutter 3. The first cutter 2 is arranged above the second cutter 3. The electrode strip travels between the first cutter 2 and the second cutter 3. The second cutter 3 is connected to a blade alignment assembly 4. The blade alignment assembly 4 drives the second cutter 3 to move linearly to adjust the distance between the first cutter 2 and the second cutter 3. A dust suction hood 7 is provided on the outside of the second cutter 3. The dust suction hood 7 is connected to a waste box 9 through a pipe 71 to suck the electrode tab waste cut by the first cutter 2 and the second cutter 3 into the waste box 9.

[0032] The lithium battery electrode tab double-sided cutting mechanism of this application performs edge cutting on both sides of the electrode strip simultaneously through two sets of cutting devices 1. The position of the second cutter 3 is adjusted by the blade setting assembly 4, and the distance between the first cutter 2 and the second cutter 3 is adjusted according to different electrode sizes to ensure the cutting effect. The electrode tab waste formed by cutting is sucked into the dust collection hood 7, realizing the recycling of electrode tab waste while removing dust.

[0033] To improve slitting efficiency, in this embodiment, reference is made to... Figures 1 to 4 The first cutter 2 is a pneumatic slitting cutter, which is mounted on the upright plate 22 via the guide rail 21.

[0034] Understandably, with this setup, the pneumatic slitting knife uses compressed air as its power source, resulting in a fast cutting speed and a longer service life than traditional cutters, reducing the number of replacements and thus improving slitting efficiency and reducing production costs. The pneumatic slitting knife is positioned on the guide rail 21 according to different tab widths, and after adjustment, it is fixed with screws, enabling the pneumatic slitting knife to adapt to the tab trimming operations of different electrode strips.

[0035] To enhance the edge trimming effect, in this embodiment, reference is made to... Figures 1 to 4 The tool setting assembly 4 includes a tool setting shaft 41, a mounting plate 42, a tool setting screw 43, and a tool setting slide rail 44. The mounting plate 42 is fixed to the dust collection hood 7 to form a dust collection chamber. The tool setting shaft 41 is rotatably mounted on the mounting plate 42. The second cutter 3 is mounted on one end of the tool setting shaft 41 located in the dust collection chamber. The mounting plate 42 is slidably connected to the tool setting slide rail 44 via a slider 45. The screw nut 46 on the tool setting screw 43 is fixed to the mounting plate 42. The tool setting screw 43 drives the mounting plate 42 and the second cutter 3 to move along the tool setting slide rail 44. The tool setting shaft 41 is connected to a drive motor 5, which drives the tool setting shaft 41 and the second cutter 3 to rotate.

[0036] It can be understood that, in this way, the second cutter 3 selects the corresponding position according to the different widths of the tabs by adjusting the position of the tool setting assembly 4, so that the first cutter 2 and the second cutter 3 cut the edge of the tab to be cut into two tab waste, reduce the width of the tab waste, facilitate the suction hood 7 to suck in the tab waste, and improve the edge cutting effect; by moving the mounting plate 42 along the tool setting slide rail 44 driven by the tool setting lead screw 43, the tool setting lead screw 43 has a certain self-locking ability with the lead screw nut 46, so that the mounting plate 42 cannot move along the tool setting slide rail 44 by itself, and the position of the second cutter 3 cannot change by itself, ensuring that the second cutter 3 can stably cut the tabs of the tab material belt.

[0037] In order to ensure that the second cutter 3 can stably work in the suction hood 7, in the embodiment, referring to Figures 1 to 4 , the second cutter 3 is a round cutter coaxially arranged on the tool setting shaft 41.

[0038] It can be understood that, in this way, there will be a continuous airflow in the suction hood 7, so that more dust will be sucked into the suction hood 7. In this environment, it is not suitable to use a pneumatic slitting cutter. The round cutter is used as the second cutter 3, which will not be affected by the airflow and dust, ensuring that the second cutter 3 can stably work.

[0039] In order to fix the second cutter 3 on the tool setting shaft 41, in the embodiment, referring to Figure 1 , the tool setting shaft 41 is coaxially provided with a first spacer sleeve 61, a second cutter 3, a guide sleeve 6 and a second spacer sleeve 62 in sequence. The guide sleeve 6 is arranged on the side of the second cutter 3 close to the first cutter 2. The diameter of the guide sleeve 6 is smaller than that of the first spacer sleeve 61 and the second spacer sleeve 62. The diameter of the second cutter 3 is larger than that of the first spacer sleeve 61 and the second spacer sleeve 62.

[0040] It can be understood that, in this way, the first spacer sleeve 61 and the second spacer sleeve 62 are located on both sides of the second cutter 3, which separates the second cutter 3 from the suction hood 7, avoiding the collision between the second cutter 3 and the suction hood 7. The guide sleeve 6 is used to guide the cut tab waste to the suction hood 7, so that the tab waste can be sucked into the waste box 9. According to the width of the tab, the guide sleeve 6 of corresponding width can be selected to meet the width requirement of tab edge cutting within a certain range, which is suitable for a wide range and convenient to install and debug.

[0041] In order to ensure that the suction hood 7 can better suck in the tab waste, in the embodiment, referring to Figure 3 , the upper side of the suction hood 7 is provided with an opening 72. The part of the second cutter 3 above the opening 72 cuts the tab material belt. The cut tab waste falls into the suction hood 7 from the opening 72.

[0042] It can be understood that, in this way, the upper opening 72 of the dust cover 7 is arranged to face the first cutter 2, and the second cutter 3 is arranged in the dust cover 7 and is higher than the opening 72 of the dust cover 7. The second cutter 3 and the first cutter 2 cut the tab of the tab material belt together, so that the airflow generated by the dust cover 7 can suck all the tab waste, and the collection effect of the tab waste is improved.

[0043] In order to ensure that the second cutter 3 has sufficient torque, in the embodiment, the driving motor 5 is in transmission connection with the cutter shaft 41 through a speed reducer 51, and the speed reducer 51 is fixedly connected with the mounting plate 42. Figure 1

[0044] It can be understood that, in this way, the torque output by the driving motor 5 is improved through the speed reducer 51 and is output to the cutter shaft 41, so that the cutter shaft 41 and the second cutter 3 have sufficient torque, and the second cutter 3 can stably perform the edge cutting operation on the tab of the tab material belt.

[0045] In order to facilitate adjustment of the position of the second cutter 3, in the embodiment, the end of the cutter lead screw 43 is provided with a handle 47. Figures 1 to 4

[0046] It can be understood that, in this way, the handle 47 is rotated to drive the cutter lead screw 43 to rotate, and the cutter lead screw 43 drives the mounting plate 42 to move along the cutter sliding rail 44 through the screw nut 46, so that the position of the second cutter 3 is conveniently adjusted, and the transmission structure of the handle 47 and the cutter lead screw 43 is simple and convenient to maintain.

[0047] In order to avoid that the mounting plate 42 is separated from the cutter sliding rail 44, in the embodiment, the cutter lead screw 43 and the cutter sliding rail 44 are arranged in parallel on the support seat 8, and limit blocks 81 are arranged at both ends of the cutter sliding rail 44. Figure 4

[0048] It can be understood that, in this way, the C-shaped limit blocks 81 are arranged at both ends of the cutter sliding rail 44, and the limit blocks 81 block the sliding blocks 45 on the mounting plate 42, so as to avoid that the sliding blocks 45 are separated from the cutter sliding rail 44, and the stability of the structure is ensured.

[0049] In order to facilitate collection and treatment of the tab waste, in the embodiment, the waste box 9 is mounted on the waste transfer trolley 91. Figure 5

[0050] ​​​​It can be understood that, thus arranged, the pipeline 71 is connected with the fan, the fan generates negative pressure, so that the tab waste falling into the dust cover 7 is sucked into the waste box 9 of the waste transfer trolley 91 through the pipeline 71, a filter element is arranged in the pipeline 71, so as to intercept the tab waste and fall into the waste box 9, and after the waste box 9 of the waste transfer trolley 91 is full of tab waste, it is transported to the waste pressing machine 92 to press the tab waste into a rectangular waste brick, which is convenient for stacking and recycling.

[0051] The first cutter 2 and the second cutter 3 are respectively provided with a pneumatic slitting cutter and a round cutter, the cutting effect is good, the frequency of replacing the cutter is low, the maintenance cost is low, the first cutter 2 and the second cutter 3 are arranged in an up-down mode, the slitting effect, the slitting precision and the slitting efficiency are improved, the probability of stacking the tab waste on the roller pressing device due to too high running speed of the machine is reduced, and the problems of poor slitting effect and poor waste collection effect caused by using an art knife in the traditional cutting operation are effectively avoided.

[0052] The above is not intended to limit the technical scope of the present application in any way, and any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application still belong to the scope of the technical scheme of the present application.

Claims

1. A lithium battery pole piece tab double-edge slitting mechanism, characterized in that, The application relates to a polar piece material belt cutting device.

2. The lithium battery pole piece tab double-side slitting mechanism according to claim 1, characterized in that, The first cutting knife is a pneumatic cutting knife which is installed on the vertical plate through a guide rail.

3. The lithium battery pole piece tab double-side slitting mechanism according to claim 1, characterized in that, The knife setting assembly comprises a knife setting shaft, a mounting plate, a knife setting screw rod and a knife setting slide rail.

4. The lithium battery pole piece tab double-side slitting mechanism according to claim 3, characterized in that, The second cutting knife is a round cutting knife which is coaxially arranged on the knife setting shaft.

5. The lithium battery pole piece tab double-side slitting mechanism according to claim 3, characterized in that, The upper side of the dust cover is provided with an opening, and the part of the second cutting knife which is higher than the opening cuts the polar piece material belt, and the cut polar lug waste falls into the dust cover from the opening.

6. The lithium battery pole piece tab double-side slitting mechanism according to claim 3, characterized in that, The driving motor is in transmission connection with the knife setting shaft through a speed reducer, and the speed reducer is fixedly connected with the mounting plate.

7. The lithium battery pole piece tab double-side slitting mechanism according to claim 3, characterized in that, The end of the knife setting screw rod is provided with a handle.

8. The lithium battery pole piece tab double-side slitting mechanism according to claim 3, characterized in that, The knife setting screw rod and the knife setting slide rail are arranged in parallel on a supporting base, and the two ends of the knife setting slide rail are provided with limiting blocks.

9. The lithium battery pole piece tab double-side slitting mechanism according to claim 3, characterized in that, The waste box is installed on a waste transfer vehicle.

10. The lithium battery pole piece tab double-side slitting mechanism according to claim 1, characterized in that, ​

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