Electrode sheet cutting device and battery electrode sheet thermal lamination apparatus

Abstract

The present application provides an electrode sheet cutting device and a battery electrode sheet thermal lamination apparatus. The electrode sheet cutting device comprises a conveyor belt, the conveyor belt comprising an upper surface and a lower surface which are oppositely arranged; upper driving rollers, arranged on the upper surface; lower driving rollers, arranged below the lower surface; and a laser cutter. The upper driving rollers comprise a first upper driving roller and a second upper driving roller which are arranged on the two sides of the laser cutter respectively and close to the laser cutter.

Description

Pole cutting device and battery pole thermal composite equipment

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on March 26, 2024, with application number 202420599765.0. The entire contents of the above application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a pole piece cutting device and a battery pole piece thermal composite device. Background Art

[0003] During the lithium battery manufacturing process, after the positive and negative electrode sheet materials are slit, they need to be cut through a cutting device. Related technologies include a metal die punching device and a laser cutting device. The laser cutting device includes a conveyor belt and a drive roller. The drive roller is used to drive the conveyor belt and thus the electrode material placed on the conveyor belt. SUMMARY OF THE INVENTION

[0004] During the process of electrode cutting, the electrode will shake on the conveyor belt, which will cause the material line to shift between the conveyor belt and the electrode, resulting in inconsistent electrode cutting lengths, poor electrode coverage, and thus affecting product quality.

[0005] In a first aspect, an embodiment of the present application provides a pole piece cutting device, the pole piece cutting device comprising:

[0006] The conveyor belt and the conveying platform include an upper surface and a lower surface arranged opposite to each other, and the upper surface is configured to place the pole piece;

[0007] an upper driving roller, the upper driving roller being disposed on the upper surface and configured to press the pole piece placed on the upper surface;

[0008] A lower driving roller is provided below the lower surface of the conveyor belt and is configured to drive the conveyor belt to move the pole piece;

[0009] a laser cutter, configured to cut the pole piece;

[0010] The upper drive roller includes a first upper drive roller and a second upper drive roller, which are respectively arranged on both sides of the laser cutter, and are both arranged close to the laser cutter.

[0011] In a second aspect, an embodiment of the present application provides a battery pole piece thermal composite device, comprising the pole piece cutting device described above, wherein the pole piece cutting device is configured to cut positive pole pieces or negative pole pieces. Beneficial effects

[0012] The electrode cutting device provided in the present application is configured by placing an upper drive roller and a lower drive roller on the upper surface and the lower surface of a conveyor belt respectively, wherein the upper drive roller is configured to press the electrode placed on the upper surface of the conveyor belt, and the lower drive roller is configured to drive the conveyor belt to move, and by placing a first upper drive roller and a second upper drive roller on both sides close to a laser cutter respectively, so that during the electrode cutting process and after the electrode cutting is completed, even if the electrode shakes on the conveyor belt, the first upper drive roller and the second upper drive roller will quickly act on the electrode, so that the electrode can be stably placed on the conveyor belt, thereby ensuring the consistency of the electrode cutting length.

[0013] The battery pole piece thermal composite equipment provided in this application includes the above-mentioned pole piece cutting device. The battery pole piece thermal composite equipment is designed based on the above-mentioned pole piece cutting device. Its beneficial effects can be found in the beneficial effects of the above-mentioned pole piece cutting device, which will not be described here one by one. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG1 is a perspective schematic diagram of a pole piece cutting device provided in an embodiment of the present application from one perspective;

[0015] FIG2 is a perspective schematic diagram of a pole piece cutting device provided in an embodiment of the present application from another perspective;

[0016] FIG3 is a partial enlarged view of FIG2;

[0017] Description of Figure Numbers:

[0018] 1. Pole piece cutting device; 10. Conveyor belt; 11. First section of conveyor belt; 12. Second section of conveyor belt; 13. Negative pressure hole; 131. First section of negative pressure hole; 132. Second section of negative pressure hole; 14. Upper surface; 15. Lower surface; 20. Upper drive roller; 21. First upper drive roller; 22. Second upper drive roller; 23. Third upper drive roller; 24. Fourth upper drive roller; 30. Lower drive roller; 31. First lower drive roller; 32. Second lower drive roller; 33. Third lower drive roller; 34. Fourth lower drive roller; 40. Laser cutter; 41. Laser emitter; 42. Laser moving platform; 50. Dust collector; 60. Pole piece; 61. Cut pole piece; 62. Pole piece raw material; 70. Vacuum adsorption plate; Modes for Carrying Out the Invention

[0019] During the lithium battery manufacturing process, after the positive electrode sheet raw materials and the negative electrode sheet raw materials are slit, the sheet raw materials need to be cut by a sheet cutting device. In the related art, the sheet cutting device includes a hardware mold punching device and a sheet cutting device, wherein the sheet cutting device includes a conveyor belt and a drive roller, and the drive roller is used to drive the conveyor belt to move and thereby drive the sheet raw materials placed on the conveyor belt to move. After the sheet raw materials are cut by the sheet, the sheet will shake on the conveyor belt, which will cause the material line to shift between the conveyor belt and the sheet, resulting in inconsistent sheet cutting lengths, resulting in poor sheet coverage, and thus affecting product quality.

[0020] As shown in FIG1 and FIG2 , an embodiment of the present application provides a pole piece cutting device 1 , which includes:

[0021] The conveyor belt 10 and the conveying platform include an upper surface 14 and a lower surface 15 arranged opposite to each other, and the upper surface 14 is used to place the pole piece 60;

[0022] The upper driving roller 20 is disposed on the upper surface 14 and is used to press or drive the pole piece 60 on the upper surface 14;

[0023] A laser cutter 40 is used to cut the pole piece 60;

[0024] A lower driving roller 30 is provided below the lower surface 15 of the conveyor belt 10 and is used to drive the conveyor belt 10 to move;

[0025] The upper driving roller 20 includes a first upper driving roller 21 and a second upper driving roller 22 . The first upper driving roller 21 and the second upper driving roller 22 are respectively arranged on both sides of the laser cutter 40 , and the first upper driving roller 21 and the second driving roller are arranged close to the laser cutter 40 .

[0026] By placing an upper drive roller 20 and a lower drive roller 30 on the upper surface 14 and the lower surface 15 of the conveyor belt 10 respectively, wherein the upper drive roller 20 is used to press or drive the pole piece 60 placed on the upper surface 14 of the conveyor belt 10, and the lower drive roller 30 is used to drive the conveyor belt 10 to move, and by symmetrically arranging the first upper drive roller 21 and the second upper drive roller 22 on both sides close to the laser cutter 40, during the cutting process of the pole piece 60 and after the cutting of the pole piece 60 is completed, even if the pole piece 60 shakes on the conveyor belt 10, the first upper drive roller 21 and the second drive roller will quickly act on the pole piece 60, so that the pole piece 60 can be stably placed on the conveyor belt 10, thereby ensuring the consistency of the cutting length of the pole piece 60.

[0027] It should be noted that, in the process of the pole piece 60 being cut by the laser cutter 40, the main source of the pole piece 60 jitter is the jitter caused by the pole piece 60 being cut by the laser, and therefore, a first upper drive roller 21 and a second upper drive roller 22 are respectively provided on both sides close to the laser cutter 40 to effectively position the pole piece 60 located on both sides of the laser cutter 40, thereby effectively reducing the amplitude of the pole piece 60 jitter, so that the pole piece 60 can be stably placed on the conveyor belt 10, thereby ensuring the consistency of the cutting length of the pole piece 60. Compared with setting the upper drive roller 20 at a position farther away from the laser cutter 40, the upper drive roller 20 has a weakened inhibitory effect on the pole piece 60 jitter, which will in turn aggravate the effect of the pole piece 60 jitter on the pole piece 60 cutting process.

[0028] The conveyor belt 10 uses a belt. Compared with the metal track in the related art, the friction coefficient between the belt and the pole piece 60 is smaller, thereby preventing the conveyor belt 10 from causing damage to the pole piece 60 during the conveying process.

[0029] The electrode piece 60 provided on the conveyor belt 10 includes an electrode piece before cutting and an electrode piece 61 after cutting, wherein one end of the electrode piece before cutting is connected to a rolled electrode piece raw material 62, and the electrode piece 61 after cutting is transported to the next process for production via the conveyor belt 10. The first upper drive roller 21 is used to effectively position the electrode piece before cutting so that the electrode piece before cutting can be stably placed on the conveyor belt 10, and the second upper drive roller 22 is used to effectively position the electrode piece 61 after cutting so that the electrode piece 61 after cutting can be stably placed on the conveyor belt 10. When both the electrode piece before cutting and the electrode piece 61 after cutting can remain stable relative to the conveyor belt 10, each part of the electrode piece cut by the laser cutter 40 can maintain the consistency of its cutting length.

[0030] 2 and 3 , the interval between the first upper driving roller 21 or the second upper driving roller 22 and the laser cutter 40 is set to 1 cm to 2 cm (including the endpoint values). In a specific implementation, the interval between the first upper driving roller 21 or the second upper driving roller 22 and the laser cutter 40 can be set to 1 cm, 1.2 cm, 1.4 cm, 1.6 cm, 1.8 cm, 2.0 cm, and a value between any two of the above values, or a range between any two of the above values.

[0031] The interval between the first upper driving roller 21 and the laser cutter 40 is set to d1, and the interval between the second upper driving roller 22 and the laser cutter 40 is set to d2. In a preferred embodiment, d1 and d2 are set to be the same.

[0032] Through research, the inventors found that the smaller the gap between the first upper drive roller 21 and the second upper drive roller 22 and the laser cutter 40, the more conducive it is to reducing the jitter generated by the pole piece 60 during the cutting process. However, when the gap between the first upper drive roller 21 or the second upper drive roller 22 and the laser cutter 40 is less than 1 cm, the high-energy laser generated by the laser cutter 40 will damage the first upper drive roller 21 or the second upper drive roller 22. When the gap between the first upper drive roller 21 or the second upper drive roller 22 and the laser cutter 40 is greater than 2 cm, the positioning effect of the first upper drive roller 21 or the second upper drive roller 22 on the pole piece 60 near both sides of the laser cutter 40 is weakened, and the local length of the cut pole piece 60 will be inconsistent, affecting the dimensional stability of the cut pole piece 60.

[0033] 2 , the lower driving roller 30 includes a first lower driving roller 31 and a second lower driving roller 32 . The first lower driving roller 31 is disposed corresponding to the first upper driving roller 21 , and the second lower driving roller 32 is disposed corresponding to the second upper driving roller 22 .

[0034] The first upper drive roller 21 is arranged corresponding to the first lower drive roller 31, and the second upper drive roller 22 is arranged corresponding to the second lower drive roller 32. During the movement of the pole piece 60, the first lower drive roller 31 and the second lower drive roller 32 operate synchronously and drive the conveyor belt 10 to run. The conveyor belt 10 acts on one side surface of the pole piece 60 and drives the pole piece 60 to move. The first upper drive roller 21 and the second upper drive roller 22 operate synchronously. The first upper drive roller 21 and the second upper drive roller 22 act on the other side surface of the pole piece 60, and the first upper drive roller 21, the second upper drive roller 22, the first lower drive roller 31 and the second lower drive roller 32 have the same size, speed and rotation direction, so that the pole piece 60 and the conveyor belt 10 keep moving synchronously, thereby ensuring that the positions of the pole piece 60 and the conveyor belt 10 remain relatively fixed during the movement, thereby ensuring the consistency of the cutting length of the pole piece 60.

[0035] At least one of the first lower driving roller 31 and the second lower driving roller 32 is configured as an encoder driving roller; and / or at least one of the first upper driving roller 21 and the second upper driving roller 22 is configured as an encoder driving roller.

[0036] In a specific implementation, both the first lower driving roller 31 and the second lower driving roller 32 are configured as encoder driving rollers, or one of the first lower driving roller 31 and the second lower driving roller 32 is configured as an encoder driving roller.

[0037] And / or, both the first upper driving roller 21 and the second upper driving roller 22 can be configured as encoder driving rollers, or one of the first upper driving roller 21 and the second upper driving roller 22 can be configured as an encoder driving roller.

[0038] The encoder drive roller is defined as a drive roller on which an encoder is installed. The encoder is provided with a PLC (Programmable Logic Controller) control program capable of controlling the running length or number of running circles of the drive roller. Therefore, the encoder drive roller can control the moving length of the conveyor belt 10 and the pole piece 60, thereby controlling the length of the cut pole piece 60 to maintain consistency.

[0039] When one of the first lower drive roller 31 and the second lower drive roller 32 is configured as an encoder drive roller, the encoder drive roller can control the conveyor belt 10 to move the same length each time, and the conveyor belt 10 acts on the cut pole piece 60, thereby controlling the length of the pole piece 60 cut each time to remain the same. When one of the first upper drive roller 21 and the second upper drive roller 22 is configured as an encoder drive roller, the encoder drive roller can control the pole piece 60 to move the same length each time, thereby controlling the length of the pole piece 60 cut each time to remain the same.

[0040] When both the first lower drive roller 31 and the second lower drive roller 32 are configured as encoder drive rollers, the first lower drive roller 31 acts on the portion of the conveyor belt 10 where the electrode piece 60 to be cut is located, and the second lower drive roller 32 acts on the portion of the conveyor belt 10 where the electrode piece 60 has been cut. The first lower drive roller 31 controls the consistency of the length of each cut electrode piece 60, and the second lower drive roller 32 is used to measure whether the length of the cut electrode piece 60 is consistent with the preset length. When both the first upper drive roller 21 and the second upper drive roller 22 are configured as encoder drive rollers, the first upper drive roller 21 acts on the electrode piece 60 to be cut, and the second upper drive roller 22 acts on the electrode piece 60 that has been cut. The first upper drive roller 21 controls the consistency of the length of each cut electrode piece 60, and the second upper drive roller 22 is used to measure whether the length of the cut electrode piece 60 is consistent with the preset length.

[0041] 1 and 2 , the lower driving roller 30 further includes a third lower driving roller 33 and a fourth lower driving roller 34 , and the conveyor belt 10 is wound between the third lower driving roller 33 and the fourth lower driving roller 34 .

[0042] By controlling the operating speeds of the third lower driving roller 33 and the fourth lower driving roller 34 , the operating speed of the conveyor belt 10 is controlled.

[0043] 1 and 2 , the upper drive roller 20 further includes a third upper drive roller 23 and a fourth upper drive roller 24 . The third upper drive roller 23 is disposed correspondingly to the third lower drive roller 33 , and the fourth upper drive roller 24 is disposed correspondingly to the fourth lower drive roller 34 .

[0044] By setting the third upper drive roller 23, the fourth upper drive roller 24, the third lower drive roller 33 and the fourth lower drive roller 34 as drive rollers of the same size, and controlling the third upper drive roller 23, the fourth upper drive roller 24, the third lower drive roller 33 and the fourth lower drive roller 34 to maintain the same operating direction and operating speed, the pole piece 60 is controlled to remain stable relative to the conveyor belt 10.

[0045] As shown in Figure 2, in order to further reduce the shaking of the conveyor belt 10, a vacuum adsorption plate 70 is provided on the lower surface 15 of the conveyor belt 10, and the conveyor belt 10 is provided with negative pressure holes 13. The vacuum adsorption plate 70 is used to adsorb the pole piece 60 on the conveyor belt 10 through the gaps between the negative pressure holes 13.

[0046] During the process of cutting the electrode piece 60 by the laser cutter 40, the inside of the vacuum adsorption plate 70 is vacuumed, and the negative pressure penetrates into the gap between the electrode piece 60 and the conveyor belt 10 through the negative pressure hole 13 set on the conveyor belt 10, and the electrode piece 60 is adsorbed on the surface of the conveyor belt 10 through the gap between the negative pressure holes 13. Therefore, during the process of laser cutting the electrode piece 60, the electrode piece 60 is subjected to the negative pressure adsorption effect and cannot shake relative to the conveyor belt 10, thereby effectively improving the stability of the cutting process.

[0047] Continuing with reference to Figure 1, the conveyor belt 10 includes a first portion conveyor belt 11 and a second portion conveyor belt 12 that are connected to each other. The first portion conveyor belt 11 and the second portion conveyor belt 12 are respectively located on both sides of the laser cutter 40. The electrode 60 placed on the first portion conveyor belt 11 is connected to the electrode 60 raw material, and the electrode 60 placed on the second portion conveyor belt 12 is configured as a cut electrode 60. The negative pressure hole 13 includes a first portion negative pressure hole 131 and a second portion negative pressure hole 132. The first portion negative pressure hole 131 is located on the first portion conveyor belt 11, and the second portion negative pressure hole 132 is located on the second portion conveyor belt 12.

[0048] A vacuum adsorption plate 70 is provided on the lower surface 15 of the first part conveyor belt 11 and the second part conveyor belt 12. During the process of cutting the electrode 60 by the laser cutter 40, negative pressure acts on the part of the electrode 60 to be cut through the first part negative pressure hole 131, and negative pressure acts on the cut electrode part through the second part negative pressure hole 132, thereby maintaining the overall stability of the electrode 60.

[0049] As shown in FIG. 1 , the laser cutter 40 includes a laser emitter 41 and a laser moving platform 42 for moving the laser emitter 41 . The laser moving platform 42 is configured to move on one side of the upper surface 14 of the conveyor belt 10 .

[0050] The laser emitter 41 is used to generate high-energy laser. The high-energy laser irradiated on the pole piece 60 will cut the pole piece 60. During the cutting process of the pole piece 60, the laser generated by the laser emitter 41 needs to move back and forth relative to the conveyor belt 10, and the moving direction of the laser emitter 41 is configured to be the same as the direction in which the pole piece 60 needs to be cut. By setting a laser moving platform 42 on one side of the upper surface 14 of the conveyor belt 10, the laser emitter 41 is connected to the laser moving platform 42. During the laser cutting process of the pole piece 60, the laser moving platform 42 drives the laser emitter 41 to move, so that the pole piece 60 can be cut by the laser generated by the laser emitter 41.

[0051] As shown in FIG. 1 and FIG. 2 , the pole piece cutting device 1 further includes a dust collector 50 , which is disposed corresponding to the laser cutter 40 .

[0052] During the cutting process of the electrode piece 60, a large amount of dust is generated. If this dust is not effectively cleaned, it will adhere to the cutting surface of the electrode piece 60 or the surface of the cut electrode piece 60, thereby causing local performance differences of the electrode piece 60 and even rendering the manufactured battery scrapped. A dust collector 50 is provided at the corresponding location of the laser cutter 40 to promptly and effectively clean the dust generated during the cutting process.

[0053] In some embodiments, the dust collector 50 is configured as a vacuum dust extraction device. Compared with the ordinary dust collector 50, the vacuum dust extraction device can improve the dust processing capability. During the cutting process of the pole piece 60, the vacuum dust extraction device is evacuated, so the dust generated during the cutting process of the pole piece 60 will be absorbed into the interior of the vacuum dust extraction device under the action of negative pressure.

[0054] One embodiment of the present application further provides a method for cutting a pole piece 60 using a laser cutting device, the cutting method comprising:

[0055] In the first step, the lower drive roller 30 and the upper drive roller 20 are driven, and the lower drive roller 30 drives the conveyor belt 10 to run; in a preferred embodiment, at least one of the lower drive rollers 30 is configured as an encoder drive roller.

[0056] When the conveyor belt 10 is running, the pole piece 60 is pressed on the belt by the upper driving roller 20. The encoder driving roller controls the number of revolutions of the encoder driving roller through the PLC program, thereby controlling the running distance of the pole piece 60 on the conveyor belt 10.

[0057] In the second step, when the pole piece 60 reaches the cutting size, the encoder drive roller and other upper drive rollers 20 and lower drive rollers 30 all stop moving, and the vacuum adsorption plate 70 provided on the lower surface 15 of the belt starts to evacuate. The vacuum adsorption plate 70 adsorbs the pole piece 60 on the conveyor belt 10 through the gaps in the holes provided on the belt, thereby reducing the vibration of the pole piece 60;

[0058] In the third step, the laser emitter 41 starts emitting laser light, controlling the movement of the laser moving platform 42 so that the laser cuts the pole piece 60 . At the same time, the dust collector 50 starts to extract dust, thereby collecting the dust after the laser cutting.

[0059] In the fourth step, after the laser cutting is completed, the vacuum adsorption plate 70 begins to de-vacuum, a part of the upper drive roller 20 presses the electrode piece 60 that has been cut, and the other part of the upper drive roller 20 presses the electrode piece 60 to be cut, and continues to drive the lower drive roller 30 and the upper drive roller 20. The conveyor belt 10 starts to run under the drive of the lower drive roller 30, and the electrode piece 60 keeps synchronous movement with the conveyor belt 10 under the drive of the conveyor belt 10 and the upper drive roller 20.

[0060] Repeat the above steps to complete the cutting of the electrode 60 .

[0061] An embodiment of the present application also provides a battery electrode thermal composite device, which includes a positive electrode cutting device, a negative electrode cutting device, a diaphragm cutting device, a thermal composite device and a lamination device, wherein the positive electrode cutting device and the negative electrode cutting device can both use the electrode cutting device 1 to cut to obtain positive electrode sheets and negative electrode sheets with strong electrode sheet size consistency. The thermal composite device presses the cut positive electrode sheets, negative electrode sheets and diaphragms into electrode sheet units through high temperature, and the electrode sheet units are formed into a single core package through the lamination device.

Claims

1. A pole piece cutting device (1), comprising: A conveyor belt (10), the conveyor belt (10) comprising an upper surface (14) and a lower surface (15) arranged opposite to each other, the upper surface (14) being configured to place a pole piece (60); an upper driving roller (20), the upper driving roller (20) being arranged on the upper surface (14) and being arranged to press the pole piece (60) placed on the upper surface (14); a lower driving roller (30), the driving roller (30) being arranged below the lower surface (15) and configured to drive the conveyor belt (10) to move so as to drive the pole piece (60); a laser cutter (40), configured to cut the pole piece (60); The upper drive roller (20) comprises a first upper drive roller (21) and a second upper drive roller (22), the first upper drive roller (21) and the second upper drive roller (22) being respectively arranged on both sides of the laser cutter (40), and the first upper drive roller (21) and the second upper drive roller (22) being both arranged close to the laser cutter (40).

2. The pole piece cutting device according to claim 1, wherein the interval between the first upper driving roller (21) or the second upper driving roller (22) and the laser cutter (40) is set to 1 cm to 2 cm.

3. The pole piece cutting device according to claim 1, wherein the lower drive roller (30) comprises a first lower drive roller (31) and a second lower drive roller (32), the first lower drive roller (31) being arranged corresponding to the first upper drive roller (21), and the second lower drive roller (32) being arranged corresponding to the second upper drive roller (22).

4. The pole piece cutting device according to claim 3, wherein at least one of the first lower drive roller (31) and the second lower drive roller (32) is configured as an encoder drive roller; and / or at least one of the first upper drive roller (21) and the second upper drive roller (22) is configured as an encoder drive roller.

5. The pole piece cutting device according to claim 3, wherein the lower drive roller (30) further comprises a third lower drive roller (33) and a fourth lower drive roller (34), and the conveyor belt (10) is arranged between the third lower drive roller (33) and the fourth lower drive roller (34).

6. The pole piece cutting device according to claim 5, wherein the upper drive roller (20) further comprises a third upper drive roller (23) and a fourth upper drive roller (24), the third upper drive roller (23) being arranged correspondingly to the third lower drive roller (33), and the fourth upper drive roller (24) being arranged correspondingly to the fourth lower drive roller (34).

7. The electrode sheet cutting device according to any one of claims 1 to 6, wherein the lower surface (15) of the conveyor belt (10) is provided with a vacuum adsorption plate (70), the conveyor belt (10) is provided with negative pressure holes (13), and the vacuum adsorption plate (70) is configured to provide negative pressure and adsorb the electrode sheet (60) on the conveyor belt (10) through the gaps between the negative pressure holes (13).

8. The electrode cutting device according to claim 7, wherein the conveyor belt (10) includes a first portion of the conveyor belt (11) and a second portion of the conveyor belt (12) connected to each other, the first portion of the conveyor belt (11) and the second portion of the conveyor belt (12) are respectively located on both sides of the laser cutter (40), the electrode (60) placed on the first portion of the conveyor belt (11) is connected to the electrode raw material (62), and the electrode (60) placed on the second portion of the conveyor belt (12) is configured as a cut electrode (61), and the negative pressure hole (13) includes a first portion of the negative pressure hole (131) and a second portion of the negative pressure hole (132), the first portion of the negative pressure hole (131) is located on the first portion of the conveyor belt (11), and the second portion of the negative pressure hole (132) is located on the second portion of the conveyor belt (12).

9. The pole piece cutting device according to any one of claims 1 to 6, wherein the laser cutter (40) comprises a laser emitter (41) and a laser moving platform (42) for moving the laser emitter (41), and the laser moving platform (42) is configured to move on one side of the upper surface (14) of the conveyor belt (10).

10. The pole piece cutting device according to claim 1, further comprising a dust collector (50), wherein the dust collector (50) is arranged corresponding to the laser cutter (40).

11. The pole piece cutting device according to any one of claims 1 to 10, wherein the conveyor belt (10) is configured as a belt.

12. A battery pole piece thermal composite device, comprising the pole piece cutting device (1) according to any one of claims 1 to 11, wherein the pole piece cutting device (1) is configured to cut positive pole pieces or negative pole pieces.

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