Pole piece die cutting dust removal mechanism, pole piece die cutting device and thermal compounding equipment

Abstract

The utility model provides a pole piece die cutting dust removal mechanism, a pole piece die cutting device and thermal compounding equipment, and the pole piece die cutting dust removal mechanism comprises a dust blowing assembly which is used for blowing dust on the cutting edge of a pole piece material belt; the dust collection assembly is arranged corresponding to the cutting edge of the pole piece material belt so as to receive the dust blown away by the dust blowing assembly; wherein the dust blowing assembly and the dust collection assembly are arranged at intervals with the pole lugs of the pole piece material belt.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery manufacturing technical field, concretely relates to a kind of pole piece die cutting dust removal mechanism, pole piece die cutting device and hot composite device. BACKGROUND

[0002] In the production and processing of battery pole piece, positive pole piece or negative pole piece material belt is die cut by using die cutting device to form a plurality of continuously arranged pole piece units, each pole piece unit includes pole piece and tab, and the cutting edge of pole piece will form carbon powder and wire drawing. The wire drawing and carbon powder of the cutting edge of pole piece will be brought into the core package, thereby causing short circuit. In the related art, the dust removal mechanism is provided to remove dust from the pole piece material belt, and the dust suction port of the dust removal mechanism is too close to the tab of the pole piece material belt, which can cause the tab to be folded and separated from the pole piece, thereby damaging the tab. SUMMARY

[0003] The embodiments of the utility model provide a kind of pole piece die cutting dust removal mechanism, pole piece die cutting device and hot composite equipment, which can improve the technical problem of ear damage of pole piece material belt in the dust removal process of dust removal mechanism.

[0004] In the first aspect, the embodiments of the utility model provide a kind of pole piece die cutting dust removal mechanism, comprising:

[0005] Dust blowing component blows dust to the cutting edge of the pole piece material belt;

[0006] Dust suction component is arranged corresponding to the cutting edge of the pole piece material belt to receive the dust blown away by the dust blowing component;

[0007] Wherein, the dust blowing component and the dust suction component are arranged at intervals with the tab of the pole piece material belt.

[0008] In an embodiment, the dust blowing component includes a dust blowing piece, the dust blowing piece is provided with a dust blowing port, the tab of the pole piece material belt is arranged protruding to the side away from the dust blowing port relative to the cutting edge, the distance between the dust blowing port and the cutting edge of the pole piece material belt is d1, and d1 is set to 10mm-20mm.

[0009] In an embodiment, the dust suction component includes a dust suction box, the distance between the dust suction port and the end of the tab of the pole piece material belt is d2, and d2 is set to 10mm-30mm.

[0010] In an embodiment, a part of the pole piece material belt is located on the roller, and the dust blowing component is located on one side of the roller;And / or, the dust suction component is located at the end of the roller.

[0011] In an embodiment, the plane in which the dust blowing port is located is arranged obliquely relative to the axial direction of the passing roller.

[0012] In an embodiment, the dust removal mechanism further comprises a connecting rod, and the dust blowing assembly is movably connected to the connecting rod to adjust the position of the dust blowing assembly relative to the connecting rod.

[0013] In an embodiment, the dust blowing assembly further comprises a dust blowing member and a connecting plate, the connecting plate connecting the dust blowing member and the connecting rod, and the connecting plate being configured to move relative to the connecting rod along the axial direction of the passing roller.

[0014] In an embodiment, the dust suction box is arranged to surround at least a portion of the passing roller, and the length of the dust suction box along the circumferential direction of the passing roller is greater than the length of the polar piece strip adhering to the passing roller along the circumferential direction of the passing roller.

[0015] In an embodiment, the passing roller further comprises a guide structure configured to guide the dust into the dust suction box.

[0016] In an embodiment, the guide structure comprises a guide boss at the end of the passing roller assembly, and the guide boss comprises a guide slope, and the included angle of the guide slope relative to the axial direction of the passing roller is 10°-30°.

[0017] In a second aspect, an embodiment of the present application provides a polar piece die cutting device, which comprises the polar piece die cutting dust removal mechanism as described above.

[0018] In a third aspect, an embodiment of the present application provides a thermal compounding device, which comprises the polar piece die cutting device and a thermal compounding device, the polar piece die cutting device is configured to cut a plurality of continuous polar piece units, and the thermal compounding device is configured to roll-press the polar piece units and the diaphragm to form a thermal compounding polar piece assembly.

[0019] The embodiment of the present application has the following beneficial effects:

[0020] In the embodiment of the present application, the dust blowing assembly is arranged to blow away the dust at the edge of the polar lug of the polar piece strip, and the dust suction assembly is arranged at the cutting edge of the polar piece strip to receive the dust blown away by the dust blowing assembly, thereby effectively improving the technical problems of wire drawing and carbon powder entering the core package at the cutting edge of the polar piece strip. The dust received by the dust suction assembly is derived from the dust blown away by the dust blowing assembly, and the dust blowing assembly and the dust suction assembly are arranged to be spaced apart from the polar lug of the polar piece strip, thereby preventing the dust blowing assembly and the dust suction assembly from acting on the polar lug of the polar piece strip and causing the polar lug to be pulled and broken. BRIEF DESCRIPTION OF DRAWINGS

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural diagram of the electrode strip provided in an embodiment of this utility model;

[0023] Figure 2 This is a three-dimensional schematic diagram of the electrode die dust removal mechanism provided in an embodiment of this utility model;

[0024] Figure 3 yes Figure 2 A magnified view of a portion of the image;

[0025] Figure 4 This is a three-dimensional schematic diagram of the electrode die dust removal mechanism provided in an embodiment of this utility model from another perspective;

[0026] Figure 5 yes Figure 4 A magnified view of a portion of the image;

[0027] Icon labels:

[0028] 100. Electrode die dust removal mechanism;

[0029] 1. Dust blowing assembly; 11. Dust blowing component; 12. Dust blowing port; 13. Connecting plate;

[0030] 2. Vacuuming assembly; 21. Vacuum box; 22. Vacuum hose; 23. Vacuum inlet;

[0031] 31. Fixing plate; 32. Supporting plate; 33. Connecting rod;

[0032] 4. Roller assembly; 41. First roller; 42. Second roller; 43. Guide structure; 44. Guide slope

[0033] 5. Electrode strip; 51. Electrode unit; 511. Electrode; 512. Electrode tab; Detailed Implementation

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application. In addition, it should be understood that the specific implementation described herein is only used to illustrate and explain the present application, and is not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower of the device in the actual use or working state, and specifically refer to the drawing direction in the drawings. The "inner" and "outer" refer to the outline of the device.

[0035] In the production and processing process of the battery pole piece, the positive pole piece material belt or the negative pole piece material belt is cut by using the pole piece die cutting device to cut the pole piece material belt 5 to form a plurality of continuously arranged pole piece units, as shown in Figure 1 Each pole piece unit 51 includes a pole piece 511 and a tab 512. The pole piece 511 is the main part of the positive or negative electrode of the battery and is composed of a current collector and an active material coating, which is the core area of the battery electrochemical reaction. The tab 512 is a conductive metal protrusion extending from the current collector of the pole piece, which is a channel for current in and out. After the pole piece material belt 5 is cut, there will be cut wire and carbon powder on the cutting edge of the pole piece. The cut wire and carbon powder on the cutting edge of the pole piece will be brought into the later core package, thereby causing a short circuit.

[0036] In the embodiments of the present application, a pole piece die cutting dust removal mechanism 100 is provided, as shown in Figure 2 and Figure 3 The pole piece die cutting dust removal mechanism 100 includes a dust blowing assembly 1, a dust suction assembly 2 and a roller assembly 4.

[0037] The roller assembly 4 includes a first roller 41 and a second roller 42. The pole piece material belt 5 is attached to a part of the surface of the first roller 41 and the second roller 42. The first roller 41 and the second roller 42 are arranged to drive the cut pole piece material belt 5.

[0038] The dust blowing assembly 1 is arranged close to the cutting edge of the pole piece material belt 5 and is arranged to blow dust on the cutting edge of the pole piece material belt 5.

[0039] The dust suction assembly 2 is arranged corresponding to the cutting edge of the pole piece material belt 5 to receive the dust blown away by the dust blowing assembly 1. The dust blowing assembly 1 and the dust suction assembly 2 are both arranged to be spaced apart from the tab 512 of the pole piece material belt 5.

[0040] By setting the dust blowing assembly 1 near the cutting edge of the pole piece material belt 5, the dust on the edge of the pole tab 512 of the pole piece material belt 5 can be blown away, and by setting the dust suction assembly 2 corresponding to the cutting edge of the pole piece material belt 5 to receive the dust blown away by the dust blowing assembly 1, the technical problem of wire drawing and carbon powder entering the core package at the cutting edge of the pole piece material belt 5 is effectively improved. Further, the dust blowing assembly 1 and the dust suction assembly 2 are both spaced apart from the pole tab 512, so as to prevent the dust blowing assembly 1 and the dust suction assembly 2 from acting on the pole tab 512 of the pole piece material belt 5 and causing the pole tab 512 to be pulled and broken.

[0041] In some embodiments, the dust blowing assembly 1 is located on one side of the first over roller 41 or the second over roller 42, and the dust suction assembly 2 is located at the end of the first over roller 41 or the second over roller 42.

[0042] The pole piece material belt 5 circumferentially surrounds a part of the surface of the first over roller 41 and the second over roller 42, the dust blowing assembly 1 is arranged on one side of the first over roller 41 or the second over roller 42, so that the dust blowing assembly 1 can blow away the dust on the cutting edge of the pole piece material belt 5. The dust suction assembly 2 is arranged at the end of the first over roller 1 or the second over roller 42, so that the dust blown away by the dust blowing assembly 1 enters the dust suction assembly 2 along the first over roller 41 or the second over roller 42, and at the same time, the dust suction port 23 of the dust suction assembly 2 is kept at a suitable distance from the pole tab 512 of the pole piece material belt 5.

[0043] In some embodiments, the dust blowing assembly 1 includes a dust blowing piece 11, which can be a blowing nozzle. The dust blowing piece 11 is arranged in a box shape, and a dust blowing port 12 is arranged on the dust blowing piece 11. The plane on which the dust blowing port 12 is arranged is arranged obliquely relative to the axis direction of the first over roller 41 and / or the second over roller 42.

[0044] By arranging the plane on which the dust blowing port 12 is arranged obliquely, the wind flowing out of the dust blowing port 12 can still blow away the carbon powder and dust such as wire drawing attached to the cutting edge of the pole piece material belt 5 while keeping a proper distance from the cutting edge of the pole piece material belt 5.

[0045] In some embodiments, as shown in Figure 3 and Figure 4 , the distance between the dust blowing port 12 and the cutting edge of the pole piece material belt 5 is d1, and d1 is 10mm-20mm. For example, the distance between the dust blowing port 12 and the cutting edge of the pole piece material belt 5 can be 10mm, 11mm, 13mm, 15mm, 17mm, 20mm, or a range between any two of the above values or a value between any two of the above values.

[0046] The inventor found through research that when the distance between the dust blowing port 12 and the cutting edge of the pole piece material belt 5 is less than 10 mm, the distance between the dust blowing port 12 and the cutting edge of the pole piece material belt 5 is close, so that the wind flowing out of the dust blowing port 12 can cause the pole lug 512 to be folded, thereby damaging the pole lug 512. When the distance between the dust blowing port 12 and the cutting edge of the pole piece material belt 5 is greater than 20 mm, the distance between the dust blowing port 12 and the cutting edge of the pole piece material belt 5 is far, and the wind force formed by the dust blowing port 12 on the cutting edge of the pole piece material belt 5 is too small, which can cause the dust on the cutting edge of the pole piece material belt 5 to be difficult to clean.

[0047] In some embodiments, the inclination angle of the plane where the dust blowing port 12 is located relative to the axis direction of the first passing roller 41 and / or the second passing roller 42 is adjusted according to the distance between the dust blowing port 12 and the cutting edge of the pole piece material belt 5, so as to adjust the wind force formed by the dust blowing port 12 on the cutting edge of the pole piece material belt 5. For example, when the distance between the dust blowing port 12 and the cutting edge of the pole piece material belt 5 is 10 mm-15 mm, the included angle between the plane where the dust blowing port 12 is located and the axis direction of the first passing roller 41 and / or the second passing roller 42 ranges from 40° to 45°. When the distance between the dust blowing port 12 and the cutting edge of the pole piece material belt 5 is 15 mm-20 mm, the included angle between the plane where the dust blowing port 12 is located and the axis direction of the first passing roller 41 and / or the second passing roller 42 ranges from 30° to 40°.

[0048] In some embodiments, the pole piece die dust removal structure 100 further comprises a fixed plate 31, a support plate 32 and a connecting rod 33, the first passing roller 41 and the second passing roller 42 are both fixed on the fixed plate 31, the support plate 32 is connected to the fixed plate 31, and the connecting rod 33 connects the support plate 32 and the dust blowing assembly 1. The dust blowing assembly 1 is configured to be movably connected to the connecting rod 33, and the dust blowing assembly 1 is configured to adjust the position of the dust blowing assembly 2 relative to the connecting rod 33 according to the width of the pole piece material belt 5.

[0049] It can be understood that when the width of the pole piece material belt 5 is large, the dust blowing assembly 1 is configured to move along the axis direction of the first passing roller 41 or the second passing roller 42 towards the cutting edge of the pole piece material belt 5, and when the width of the pole piece material belt 5 is small, the dust blowing assembly 1 is configured to move along the axis direction of the first passing roller 41 or the second passing roller 42 away from the cutting edge of the pole piece material belt 5, so that the distance between the dust blowing port 12 of the dust blowing assembly 1 and the cutting edge of the pole piece material belt 5 is kept within a suitable interval range of 10 mm-20 mm.

[0050] In some embodiments, the dust blowing assembly 1 comprises a dust blowing piece 11 and a connecting plate 13, the connecting plate 13 connects the dust blowing piece 11 and the connecting rod 33, and the connecting plate 13 is configured to move relative to the connecting rod 33 along the axis direction of the first roller 41 or the second roller 42. Specifically, the connecting rod 33 is provided as a screw rod with a threaded structure, and the connecting plate 13 is threadedly connected with the connecting rod 33.

[0051] In some embodiments, the dust suction assembly 2 comprises a dust suction box 21 and a dust suction pipe 22, the dust suction pipe 22 is externally connected with a negative pressure, the top of the dust suction box 21 is provided with a dust suction port 23, and the dust such as carbon powder and wire drawing attached to the cut edge of the pole piece material belt 5 is separated from the pole piece material belt 5 under the blowing action of the dust blowing assembly 1 and enters the dust suction box 21 through the dust suction port 23 and enters the dust suction pipe 22 under the negative pressure action of the dust suction pipe 22.

[0052] In some embodiments, the dust suction box 21 is arranged to surround at least a part of the first roller 41 or the second roller 42, and the length of the dust suction box 21 surrounding the first roller 41 or the second roller 42 is greater than the length of the pole piece material belt 5 adhering to the first roller 41 or the second roller 42, so that the dust blown away from the cut edge of the pole piece material belt 5 by the dust blowing assembly 1 can all enter the dust suction box 21 along the first roller 41 or the second roller 42. For example, the length of the pole piece material belt 5 adhering to the first roller 41 or the second roller 42 is 15 mm, and the length of the dust suction box 21 surrounding the first roller 41 or the second roller 42 is 45 mm.

[0053] In some embodiments, the ratio of the length of the dust suction box 21 surrounding the first roller 41 or the second roller 42 to the circumference of the first roller 41 or the second roller 42 is in the range of 1 / 5 to 3 / 5.

[0054] In some embodiments, continuing to refer to Figure 3 and Figure 4 , the distance d2 between the dust suction port 23 of the dust suction box 21 and the end of the pole tab 512 of the pole piece material belt 5 is in the range of 10 mm to 30 mm.

[0055] The inventor found through research that when the height of the pole tab 512 is within 30 mm, the distance between the dust suction port 23 of the dust suction box 21 and the end of the pole tab 512 of the pole piece material belt 5 is in the range of 10 mm to 20 mm, the dust suction port 23 can maintain the dust suction capability while avoiding the negative pressure generated by the dust suction port 23 from pulling the pole tab 512. When the height of the pole tab 512 is greater than 30 mm, the distance between the dust suction port 23 of the dust suction box 21 and the end of the pole tab 512 of the pole piece material belt 5 is in the range of 20 mm to 30 mm, the dust suction port 23 can maintain the dust suction capability while avoiding the negative pressure generated by the dust suction port 23 from pulling the pole tab 512.

[0056] In some embodiments, the first passing roller 41 or the second passing roller 42 further comprises a guide structure 43 located at one end of the first passing roller 41 or the second passing roller 42, and the guide structure 43 is configured to guide the dust into the dust suction box 21.

[0057] By arranging the guide structure 43, the dust on the cutting edge of the pole piece strip 5 can enter the dust suction box 21 along the guide structure 43.

[0058] In some embodiments, as shown in Figure 4 and Figure 5 the guide structure 43 comprises a guide boss located at the end of the first passing roller 41 or the second passing roller 42, and the guide boss comprises a guide slope 44, and the included angle of the guide slope 44 with respect to the axis direction of the first passing roller 41 or the second passing roller 42 is α, and α is 10°-30°.

[0059] The inventor found through research that the included angle of the guide slope 44 with respect to the axis direction of the first passing roller 41 or the second passing roller 42 needs to be set according to the length of the wire drawing on the cutting edge of the pole piece strip 5. When the length of the wire drawing on the cutting edge of the pole piece strip 5 is relatively short, if the included angle of the guide slope 44 with respect to the axis direction of the first passing roller 41 or the second passing roller 42 is too small, the wire drawing is easy to be blown out of the dust suction port 23 by the dust blowing assembly 1. When the length of the wire drawing on the cutting edge of the pole piece strip 5 is relatively long, if the included angle of the guide slope 44 with respect to the axis direction of the first passing roller 41 or the second passing roller 42 is too large, part of the wire drawing will be broken and blown out of the dust suction port 23. When the length of the wire drawing on the cutting edge of the pole piece strip 5 is within 50 mm, the included angle of the guide slope 44 with respect to the axis direction of the first passing roller 41 or the second passing roller 42 is 20°-30°, and when the length of the wire drawing on the cutting edge of the pole piece strip 5 is greater than 50 mm, the included angle of the guide slope 44 with respect to the axis direction of the first passing roller 41 or the second passing roller 42 is 10°-20°.

[0060] The embodiments of the present application also provide a pole piece die cutting device, which comprises a die cutting mechanism and the pole piece die cutting and dust removing mechanism described above, wherein the die cutting mechanism can be a laser cutter, and the die cutting mechanism performs die cutting on the pole piece strip 5 to form a plurality of continuous pole piece units 51, and each pole piece unit 51 comprises a pole piece 511 and a tab 512. The pole piece die cutting and dust removing mechanism 100 removes the dust on the cutting edge of the pole piece strip 5, thereby preventing the carbon powder and the wire drawing on the cutting edge from entering the core package in the subsequent process.

[0061] The embodiment of the present application also provides a hot compounding device, which comprises the above-mentioned polar piece die-cutting device, polar piece cutting device, polar piece hot compounding device and laminating device, the polar piece die-cuting device cuts the polar piece material belt to form a plurality of continuous polar piece units, the polar piece cutting device cuts the plurality of continuous polar piece units to form a single polar piece unit, the polar piece hot compounding device forms a hot compounding polar piece assembly by hot rolling the single positive polar piece unit, the separator and the single negative polar piece unit, and the laminating device stacks a plurality of hot compounding polar piece assemblies to form a core package.

[0062] The above has carried out the detailed introduction to the embodiment of the utility model, the principle and the implementation mode of the utility model have been set forth with the application of specific example in this paper, the above embodiment explanation is only for helping understanding the method of the utility model and its core thought; simultaneously, for the technical personnel in the art, according to the thought of the utility model, there will be changes in specific implementation mode and application range, and the above is described, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A dust removal mechanism for electrode molds, characterized in that, include: The dust blowing assembly blows dust off the cut edges of the electrode strip; A dust collection component is provided corresponding to the cut edge of the electrode strip to receive the dust blown away by the dust blowing component; The dust blowing assembly and the dust suction assembly are both spaced apart from the tabs of the electrode strip.

2. The electrode die dust removal mechanism according to claim 1, characterized in that, The dust blowing assembly includes a dust blowing component, which has a dust blowing port. The electrode tab of the electrode strip protrudes from the side opposite to the dust blowing port relative to the cutting edge. The distance between the dust blowing port and the cutting edge of the electrode strip is d1, which is set to 10mm to 20mm.

3. The electrode die dust removal mechanism according to claim 2, characterized in that, The dust collection assembly includes a dust collection box, which has a dust collection port. The distance between the dust collection port and the end of the electrode tab of the electrode strip is d2, and d2 is set to 10mm to 30mm.

4. The electrode die dust removal mechanism according to claim 3, characterized in that, A portion of the electrode strip is located on the roller, and the dust blowing assembly is located on one side of the roller; and / or, the dust suction assembly is located at the end of the roller.

5. The electrode die dust removal mechanism according to claim 4, characterized in that, The plane containing the dust blowing port is inclined relative to the axial direction of the roller.

6. The electrode die dust removal mechanism according to claim 4, characterized in that, The electrode die dust removal mechanism further includes a connecting rod, and the dust blowing assembly is configured to be movably connected to the connecting rod to adjust the position of the dust blowing assembly relative to the connecting rod.

7. The electrode die dust removal mechanism according to claim 6, characterized in that, The dust blowing assembly further includes a dust blowing element and a connecting plate, the connecting plate connecting the dust blowing element and the connecting rod, the connecting plate being movable relative to the connecting rod along the axial direction of the roller.

8. The electrode die dust removal mechanism according to claim 4, characterized in that, The dust collection box is configured to surround at least a portion of the roller, and the length of the dust collection box around the roller in the circumferential direction is greater than the length of the electrode strip that is attached to the roller in the circumferential direction.

9. The electrode die dust removal mechanism according to claim 8, characterized in that, The roller also includes a guide structure, which is configured to guide the dust into the dust collection box.

10. The electrode die dust removal mechanism according to claim 9, characterized in that, The guiding structure includes a guide boss located at the end of the roller assembly. The guide boss includes a guide ramp, and the angle between the guide ramp and the axial direction of the roller is α, where α is 10° to 30°.

11. An electrode die-cutting device, characterized in that, The electrode die-cutting device includes the electrode die-cutting dust removal mechanism as described in any one of claims 1 to 10.

12. A thermal composite device, characterized in that, The thermal bonding equipment includes the electrode die-cutting device as described in claim 11 and the thermal bonding device. The electrode die-cutting device is configured to cut and form a plurality of continuous electrode units, and the thermal bonding device is configured to heat-press the electrode units with a diaphragm to form a thermally bonded electrode assembly.

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