Pole piece cutting device and battery pole piece thermal compounding equipment

Abstract

The utility model provides a pole piece cutting device and battery pole piece thermal compounding equipment, the pole piece cutting device comprises a conveyor belt, the conveyor belt comprises an upper surface and a lower surface which are oppositely arranged, and the upper surface is used for placing a pole piece; the upper driving roller is arranged on the upper surface and is used for pressing the pole piece placed on the upper surface; the lower driving roller is arranged below the lower surface of the conveying belt and is used for driving the conveying belt to move so as to drive the pole piece; the laser cutter is used for cutting the pole piece; the upper driving roller comprises a first upper driving roller body and a second upper driving roller body, the first upper driving roller body and the second upper driving roller body are arranged on the two sides of the laser cutter respectively, and the first upper driving roller body and the second upper driving roller body are arranged close to the laser cutter.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly relates to a pole piece cutting device and a battery pole piece thermal composite device. Background Art

[0002] In the production and manufacturing process of lithium batteries, after the positive pole piece raw material and the negative pole piece raw material are slit, the pole piece raw material needs to be cut by a pole piece cutting device. In the related art, the pole piece cutting device includes a hardware mold punching device and a laser cutting device. The laser cutting device includes a conveyor belt and a driving roller. The driving roller is used to drive the conveyor belt to move so as to drive the pole piece raw material placed on the conveyor belt. During the process of cutting the pole piece by the pole piece cutting device, the pole piece will vibrate on the conveyor belt, which will cause the material line to shift between the conveyor belt and the pole piece, resulting in inconsistent cutting lengths of the pole piece, and thus poor pole piece coverage, which affects the product quality. Summary of the Utility Model

[0003] An embodiment of the utility model provides a pole piece cutting device, which can improve the technical problem that the pole piece is prone to vibrate on the conveyor belt after being cut.

[0004] In a first aspect, an embodiment of the utility model provides a pole piece cutting device, which includes:

[0005] A conveyor belt, the conveyor belt includes an upper surface and a lower surface which are oppositely arranged, and the upper surface is used for placing the pole piece;

[0006] An upper driving roller, which is arranged above the upper surface and is used to press the pole piece placed on the upper surface;

[0007] A lower driving roller, which is arranged below the lower surface of the conveyor belt and is used to drive the conveyor belt to move to drive the pole piece;

[0008] A laser cutter, which is used to cut the pole piece;

[0009] Wherein, the upper driving roller includes a first upper driving roller and a second upper driving roller. The first upper driving roller and the second upper driving roller are respectively arranged on both sides of the laser cutter, and both the first upper driving roller and the second driving roller are arranged close to the laser cutter.

[0010] In an embodiment, the interval between the first upper driving roller or the second upper driving roller and the laser cutter is set to be 1 cm to 2 cm.

[0011] In one embodiment, the lower driving rollers include a first lower driving roller and a second lower driving roller. The first lower driving roller is correspondingly arranged with the first upper driving roller, and the second lower driving roller is correspondingly arranged with the second upper driving roller.

[0012] In one embodiment, at least one of the first lower driving roller and the second lower driving roller is arranged as an encoder driving roller; and / or at least one of the first upper driving roller and the second upper driving roller is arranged as an encoder driving roller.

[0013] In one embodiment, the lower driving rollers further include a third lower driving roller and a fourth lower driving roller, and the conveyor belt is wound between the third lower driving roller and the fourth lower driving roller.

[0014] In one embodiment, the upper driving rollers further include a third upper driving roller and a fourth upper driving roller. The third upper driving roller is correspondingly arranged with the third lower driving roller, and the fourth upper driving roller is correspondingly arranged with the fourth lower driving roller.

[0015] In one embodiment, a vacuum adsorption plate is arranged on the lower surface of the conveyor belt. The conveyor belt is provided with negative pressure holes, and the vacuum adsorption plate is used to provide negative pressure and adsorb the pole piece on the conveyor belt through the intervals between the negative pressure holes.

[0016] In one embodiment, the conveyor belt includes a first part conveyor belt and a second part conveyor belt connected to each other. The first part conveyor belt and the second part conveyor belt are respectively located on both sides of the laser cutter. The pole piece placed on the first part conveyor belt is connected to the pole piece raw material, and the pole piece placed on the second part conveyor belt is configured as the pole piece after cutting. The negative pressure holes include a first part negative pressure hole and a second part negative pressure hole. The first part negative pressure hole is located on the first part conveyor belt, and the second part negative pressure hole is located on the second part conveyor belt.

[0017] In one embodiment, the laser cutter includes a laser emitter and a laser moving platform for moving the laser emitter. The laser moving platform is configured to move on one side of the upper surface of the conveyor belt.

[0018] In one embodiment, the pole piece cutting device further includes a dust collector, and the dust collector is correspondingly arranged with the laser cutter.

[0019] In one embodiment, the dust collector is arranged as a vacuum dust extraction device.

[0020] In a second aspect, an embodiment of the present invention provides a battery pole piece thermal composite device, including the above-mentioned pole piece cutting device, and the pole piece cutting device is used to cut the positive pole piece or the negative pole piece.

[0021] Advantages of the embodiments of the present utility model:

[0022] In the embodiments of the present utility model, an upper driving roller and a lower driving roller are respectively placed on the upper surface and the lower surface of the conveyor belt. The upper driving roller is used to press the pole piece placed on the upper surface of the conveyor belt, and the lower driving roller is used to drive the conveyor belt to move. By placing a first upper driving roller and a second upper driving roller on both sides close to the laser cutter respectively, during and after the pole piece cutting process, even if the pole piece vibrates on the conveyor belt, the first upper driving roller and the second upper driving roller will quickly act on the pole piece, enabling the pole piece to be stably placed on the conveyor belt, thereby ensuring the consistency of the cutting length of the pole piece. Description of the drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0024] Figure 1 is a perspective three-dimensional schematic diagram of a pole piece cutting device provided by the embodiments of the present utility model;

[0025] Figure 2 is another perspective three-dimensional schematic diagram of a pole piece cutting device provided by the embodiments of the present utility model;

[0026] Figure 3 is Figure 2 a partial enlarged view;

[0027] Explanation of the reference numerals in the drawings:

[0028] 1. Pole piece cutting device; 10. Conveyor belt; 11. First part of the conveyor belt; 12. Second part of the conveyor belt; 13. Negative pressure holes; 131. First part of the negative pressure holes; 132. Second part of the negative pressure holes; 14. Upper surface; 15. Lower surface; 20. Upper driving roller; 21. First upper driving roller; 22. Second upper driving roller; 23. Third upper driving roller; 24. Fourth upper driving roller; 30. Lower driving roller; 31. First lower driving roller; 32. Second lower driving roller; 33. Third lower driving roller; 34. Fourth lower driving 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; Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present utility model. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model. In the present utility model, unless otherwise stated, the orientation words such as "upper" and "lower" usually refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0030] In the production and manufacturing process of lithium batteries, after the positive electrode sheet raw material and the negative electrode sheet raw material are slit, the electrode sheet raw material needs to be cut by an electrode sheet cutting device. In the related art, the electrode sheet cutting device includes a hardware mold punching device and an electrode sheet cutting device. The electrode sheet cutting device includes a conveyor belt and a driving roller. The driving roller is used to drive the conveyor belt to move and thus drive the electrode sheet raw material placed on the conveyor belt to move. After the electrode sheet raw material is cut by the electrode sheet cutting device, the electrode sheet will vibrate on the conveyor belt, which will cause the material line to shift between the conveyor belt and the electrode sheet, resulting in inconsistent cutting lengths of the electrode sheet, and thus poor electrode sheet coverage, affecting the product quality.

[0031] As Figure 1 and Figure 2 shown, in an embodiment of the present utility model, an electrode sheet cutting device 1 is provided. The electrode sheet cutting device 1 includes:

[0032] A conveyor belt 10, the conveyor belt includes an upper surface 14 and a lower surface 15 arranged oppositely, and the upper surface 14 is used to place the electrode sheet 60;

[0033] An upper driving roller 20, the upper driving roller 20 is arranged above the upper surface 14 and is used to press or drive the electrode sheet 60 on the upper surface 14;

[0034] A laser cutter 40, which is used to cut the electrode sheet 60;

[0035] A lower driving roller 30, the driving roller is arranged below the lower surface 15 of the conveyor belt 10 and is used to drive the conveyor belt 10 to move;

[0036] Wherein, 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.

[0037] By placing the upper driving roller 20 and the lower driving roller 30 on the upper surface 14 and the lower surface 15 of the conveyor belt 10 respectively, where the upper driving roller 20 is used to press or drive the electrode sheet 60 placed on the upper surface 14 of the conveyor belt 10, and the lower driving roller 30 is used to drive the conveyor belt 10 to move. And by symmetrically arranging the first upper driving roller 21 and the second upper driving roller 22 on both sides close to the laser cutter 40 respectively, during the cutting process of the electrode sheet 60 and after the electrode sheet 60 is cut, even if the electrode sheet 60 jitters on the conveyor belt 10, the first upper driving roller 21 and the second driving roller will quickly act on the electrode sheet 60, so that the electrode sheet 60 can be stably placed on the conveyor belt 10, thereby ensuring the consistency of the cutting length of the electrode sheet 60.

[0038] It should be noted that during the process of the electrode sheet 60 being cut by the laser cutter 40, the main source of the jitter of the electrode sheet 60 is the jitter generated when the electrode sheet 60 is cut by the laser. Therefore, the first upper driving roller 21 and the second upper driving roller 22 are respectively arranged on both sides close to the laser cutter 40 to effectively position the electrode sheet 60 on both sides of the laser cutter 40, so as to effectively reduce the amplitude of the jitter of the electrode sheet 60, so that the electrode sheet 60 can be stably placed on the conveyor belt 10, thereby ensuring the consistency of the cutting length of the electrode sheet 60. Compared with setting the upper driving roller 20 at a position far from the laser cutter 40, the inhibitory effect of the upper driving roller 20 on the jitter of the electrode sheet 60 is weakened, which will further exacerbate the influence of the jitter of the electrode sheet 60 on the cutting process of the electrode sheet 60.

[0039] The above-mentioned conveyor belt 10 is preferably made of a belt. Compared with the metal track in the related art, the friction coefficient between the belt and the electrode sheet 60 is smaller, so it can prevent the conveyor belt 10 from damaging the electrode sheet 60 during the conveying process.

[0040] The electrode sheet 60 arranged on the conveyor belt 10 includes the electrode sheet before cutting and the electrode sheet 61 after cutting. One end of the electrode sheet before cutting is connected to the coiled electrode sheet raw material 62, and the cut electrode sheet 61 is transported to the next process for production through the conveyor belt 10. The first upper driving roller 21 is used to effectively position the electrode sheet before cutting, so that the electrode sheet before cutting can be stably placed on the conveyor belt 10, and the second upper driving roller 22 is used to effectively position the cut electrode sheet 61, so that the cut electrode sheet 61 can be stably placed on the conveyor belt 10. When both the electrode sheet before cutting and the cut electrode sheet 61 can remain stable relative to the conveyor belt 10, each part of the electrode sheet cut by the laser cutter 40 can maintain the consistency of its cutting length.

[0041] Further refer to Figure 2 and Figure 3As shown, the distance between the first upper driving roller 21 or the second upper driving roller 22 and the laser cutter 40 is set to be 1 cm to 2 cm (including the end values). In a specific implementation, the distance 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 the values between any two of the above, or the range between any two of the above values.

[0042] Among them, the distance between the first upper driving roller 21 and the laser cutter 40 is set to d1, and the distance between the second upper driving roller 22 and the laser cutter 40 is set to d2. In a preferred implementation, d1 and d2 are set to be the same.

[0043] The inventor found through research that the smaller the distance between the first upper driving roller 21 or the second upper driving 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. When the distance between the first upper driving roller 21 or the second upper driving 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 driving roller 21 or the second upper driving roller 22. When the distance between the first upper driving roller 21 or the second upper driving roller 22 and the laser cutter 40 is greater than 2 cm, the positioning effect of the first upper driving roller 21 or the second upper driving roller 22 on the pole pieces 60 near both sides of the laser cutter 40 is weakened, and then there will be a phenomenon that the local lengths of the cut pole pieces 60 are inconsistent, affecting the dimensional stability of the cut pole pieces 60.

[0044] Further referring to Figure 2 As shown, 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 correspondingly arranged with the first upper driving roller 21, and the second lower driving roller 32 is correspondingly arranged with the second upper driving roller 22.

[0045] The first upper driving roller 21 and the first lower driving roller 31 are correspondingly arranged, and the second upper driving roller 22 and the second lower driving roller 32 are correspondingly arranged. During the movement of the pole piece 60, the first lower driving roller 31 and the second lower driving roller 32 rotate 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 driving roller 21 and the second upper driving roller 22 rotate synchronously. The first upper driving roller 21 and the second upper driving roller 22 act on the other side surface of the pole piece 60. Moreover, the sizes, rotation speeds, and rotation directions of the first upper driving roller 21, the second upper driving roller 22, the first lower driving roller 31, and the second upper driving roller 22 are the same, so that the pole piece 60 and the conveyor belt 10 move synchronously, thereby ensuring that the positions of the pole piece 60 and the conveyor belt 10 are relatively fixed during the movement, and further ensuring the consistency of the cutting length of the pole piece 60.

[0046] Furthermore, at least one of the first lower driving roller 31 and the second lower driving roller 32 is set 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 set as an encoder driving roller.

[0047] In a specific implementation, both the first lower driving roller 31 and the second lower driving roller 32 are set as encoder driving rollers, or one of the first lower driving roller 31 and the second lower driving roller 32 is set as an encoder driving roller.

[0048] And / or, both the first upper driving roller 21 and the second upper driving roller 22 can be set as encoder driving rollers, or one of the first upper driving roller 21 and the second upper driving roller 22 is set as an encoder driving roller.

[0049] An encoder driving roller is defined as an encoder installed on the driving roller. The encoder is provided with a PLC (Programmable Logic Controller) control program that can control the running length or the number of running turns of the driving roller. Therefore, the encoder driving roller can control the moving length of the conveyor belt 10 and the pole piece 60, and further control the length of the cut pole piece 60 to be consistent.

[0050] When one of the first lower driving roller 31 and the second lower driving roller 32 is set as an encoder driving roller, the encoder driving roller can control the conveyor belt 10 to move the same length each time. The conveyor belt 10 acts on the cut pole piece 60, and further controls the length of the cut pole piece 60 to be the same each time. When one of the first upper driving roller 21 and the second upper driving roller 22 is set as an encoder driving roller, the encoder driving roller can control the pole piece 60 to move the same length each time, and further control the length of the cut pole piece 60 to be the same each time.

[0051] In a further preferred embodiment, when both the first lower driving roller 31 and the second lower driving roller 32 are set as encoder driving rollers, the first lower driving roller 31 acts on the conveyor belt 10 of the part where the pole piece 60 to be cut is located, and the second lower driving roller 32 acts on the conveyor belt 10 of the part where the cut pole piece 60 is located. The first lower driving roller 31 controls the consistency of the length of the pole piece 60 cut each time, and the second lower driving roller 32 is used to measure whether the length of the cut pole piece 60 is consistent with the preset length. When both the first upper driving roller 21 and the second upper driving roller 22 are set as encoder driving rollers, the first upper driving roller 21 acts on the pole piece 60 to be cut, and the second upper driving roller 22 acts on the cut pole piece 60. The first upper driving roller 21 controls the consistency of the length of the pole piece 60 cut each time, and the second upper driving roller 22 is used to measure whether the length of the cut pole piece 60 is consistent with the preset length.

[0052] Continue to refer to Figure 1 and Figure 2 As shown, 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.

[0053] By controlling the running speeds of the third lower driving roller 33 and the fourth lower driving roller 34, the running speed of the conveyor belt 10 is further controlled.

[0054] Further refer to Figure 1 and Figure 2 As shown, the upper driving roller 20 further includes a third upper driving roller 23 and a fourth upper driving roller 24. The third upper driving roller 23 is correspondingly arranged with the third lower driving roller 33, and the fourth upper driving roller 24 is correspondingly arranged with the fourth lower driving roller 34.

[0055] By setting the third upper driving roller 23, the fourth upper driving roller 24, the third lower driving roller 33 and the fourth lower driving roller 34 as driving rollers of the same size, and controlling the third upper driving roller 23, the fourth upper driving roller 24, the third lower driving roller 33 and the fourth lower driving roller 34 to run in the same running direction and at the same running speed, the pole piece 60 is controlled to be stable relative to the conveyor belt 10.

[0056] As Figure 2 shown, in order to further reduce the vibration of the conveyor belt 10, a vacuum adsorption plate 70 is arranged on the lower surface 15 of the conveyor belt 10. 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 intervals between the negative pressure holes 13.

[0057] During the process of the laser cutter 40 cutting the pole piece 60, by evacuating the inside of the vacuum adsorption plate 70, the negative pressure further penetrates into the gap between the pole piece 60 and the conveyor belt 10 through the negative pressure holes 13 provided on the conveyor belt 10, and the pole piece 60 is adsorbed on the surface of the conveyor belt 10 through the gaps between the negative pressure holes 13. Therefore, during the process of the laser cutting the pole piece 60, the pole piece 60 is subjected to the negative pressure adsorption effect and cannot vibrate relative to the conveyor belt 10, thereby effectively improving the stability of the cutting process.

[0058] Further referring to Figure 1 As shown, the conveyor belt 10 includes a connected first part conveyor belt 11 and a second part conveyor belt 12. The first part conveyor belt 11 and the second part conveyor belt 12 are respectively located on both sides of the laser cutter 40. The pole piece 60 placed on the first part conveyor belt 11 is connected to the pole piece 60 raw material, and the pole piece 60 placed on the second part conveyor belt 12 is configured as the pole piece 60 after cutting. The negative pressure holes 13 include a first part negative pressure hole 131 and a second part negative pressure hole 132. The first part negative pressure hole 131 is located on the first part conveyor belt 11, and the second part negative pressure hole 132 is located on the second part conveyor belt 12.

[0059] Vacuum adsorption plates 70 are provided on the lower surfaces 15 of both the first part conveyor belt 11 and the second part conveyor belt 12. During the process of the laser cutter 40 cutting the pole piece 60, the negative pressure acts on the part of the pole piece 60 to be cut through the first part negative pressure hole 131, and the negative pressure acts on the cut part of the pole piece through the second part negative pressure hole 132, so as to maintain the overall stability of the pole piece 60.

[0060] As Figure 1 shown, 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.

[0061] The above-mentioned laser emitter 41 is used to generate high-energy laser. When the high-energy laser irradiates on the pole piece 60, the pole piece 60 will be cut off. During the process of cutting the pole piece 60, the laser generated by the laser emitter 41 needs to reciprocate 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 off. By providing the laser moving platform 42 on one side of the upper surface 14 of the conveyor belt 10 and connecting the laser emitter 41 to the laser moving platform 42, during the process of the laser cutting 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 off by the laser generated by the laser emitter 41.

[0062] AsFigure 1 and Figure 2 As shown in Figure 2 , the pole piece cutting device 1 further includes a dust collector 50, and the dust collector 50 is correspondingly arranged with the laser cutter 40.

[0063] During the cutting process of the pole piece 60, a large amount of dust will be generated. If the dust is not cleaned effectively, it will adhere to the cut surface of the pole piece 60 or the surface of the cut pole piece 60, resulting in local performance differences of the pole piece 60, and even scrapping the battery produced. By correspondingly arranging the dust collector 50 at the laser cutter 40, it is used to clean the dust generated during the cutting process in a timely and effective manner.

[0064] In a further preferred embodiment, the dust collector 50 is set as a vacuum dust extraction device. The vacuum dust extraction device can further improve the dust treatment ability compared with the ordinary dust collector 50. 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 adsorbed into the interior of the vacuum dust extraction device under the action of negative pressure.

[0065] An embodiment of the present utility model further provides a method for cutting the pole piece 60 using the above laser cutting device. The cutting method includes:

[0066] The first step is to drive the lower driving roller 30 and the upper driving roller 20, and the lower driving roller 30 drives the conveyor belt 10 to run; in a preferred embodiment, at least one of the lower driving rollers 30 is set as an encoder driving roller.

[0067] When the conveyor belt 10 runs, the pole piece 60 is pressed on the belt by the upper driving roller 20. The encoder driving roller controls the number of rotation circles of the encoder driving roller through the PLC program, and then controls the running distance of the pole piece 60 on the conveyor belt 10;

[0068] The second step is that when the pole piece 60 reaches the cutting size, the encoder driving roller and the other upper driving rollers 20 and lower driving rollers 30 all stop moving, and the vacuum adsorption plate 70 arranged 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 gap of the holes arranged on the belt, thereby reducing the jitter of the pole piece 60;

[0069] The third step is that the laser emitter 41 starts to emit laser, controls the movement of the laser moving platform 42, and then the laser cuts the pole piece 60. At the same time, the dust collector 50 starts to extract dust, so as to collect the dust after laser cutting;

[0070] In the fourth step, after the laser cutting is completed, the vacuum adsorption plate 70 starts to release the vacuum. A part of the upper driving rollers 20 press the cut pole pieces 60, and the other part of the upper driving rollers 20 press the pole pieces 60 to be cut. Then, continue to drive the lower driving roller 30 and the upper driving rollers 20. The conveyor belt 10 starts to run driven by the lower driving roller 30. The pole pieces 60 are driven by the conveyor belt 10 and the upper driving rollers 20 and move synchronously with the conveyor belt 10.

[0071] Repeat the above steps to complete the cutting of the pole pieces 60.

[0072] An embodiment of the present invention further provides a battery pole piece thermal composite device. The battery pole piece thermal composite device includes a positive pole piece cutting device, a negative pole piece cutting device, a separator cutting device, a thermal composite device, and a stacking device. The positive pole piece cutting device and the negative pole piece cutting device can both use the above-mentioned pole piece cutting device 1 for cutting to obtain positive pole pieces and negative pole pieces with strong dimensional consistency. The thermal composite device forms a pole piece unit by hot pressing the cut positive pole pieces, negative pole pieces, and separator at high temperature. The pole piece unit forms a single core package through the stacking device.

[0073] The above has introduced the embodiments of the present invention in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. At the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A pole piece cutting device, characterized in that: include: A conveyor belt, the conveyor belt comprising an upper surface and a lower surface arranged opposite to each other, the upper surface being used for placing the pole piece; an upper driving roller, the upper driving roller being arranged on the upper surface and used for pressing the pole piece placed on the upper surface; A lower driving roller, the driving roller is arranged below the lower surface of the conveyor belt and is used to drive the conveyor belt to move so as to drive the pole piece; A laser cutter, used for cutting the pole piece; The upper driving roller comprises a first upper driving roller and a second upper driving roller, the first upper driving roller and the second upper driving roller are respectively arranged on both sides of the laser cutter, and the first upper driving roller and the second upper driving roller are both arranged close to the laser cutter.

2. The pole piece cutting device according to claim 1, characterized in that: The interval between the first upper driving roller or the second upper driving roller and the laser cutter is set to 1 cm to 2 cm.

3. The pole piece cutting device according to claim 1, characterized in that: The lower driving roller includes a first lower driving roller and a second lower driving roller, the first lower driving roller is arranged correspondingly to the first upper driving roller, and the second lower driving roller is arranged correspondingly to the second upper driving roller.

4. The pole piece cutting device according to claim 3, characterized in that: At least one of the first lower driving roller and the second lower driving roller is configured as an encoder driving roller; and / or at least one of the first upper driving roller and the second upper driving roller is configured as an encoder driving roller.

5. The pole piece cutting device according to claim 3, characterized in that: The lower driving roller further comprises a third lower driving roller and a fourth lower driving roller, and the conveyor belt is arranged between the third lower driving roller and the fourth lower driving roller.

6. The pole piece cutting device according to claim 5, characterized in that: The upper driving roller further includes a third upper driving roller and a fourth upper driving roller. The third upper driving roller is arranged correspondingly to the third lower driving roller, and the fourth upper driving roller is arranged correspondingly to the fourth lower driving roller.

7. The pole piece cutting device according to any one of claims 1 to 6, characterized in that: A vacuum adsorption plate is arranged on the lower surface of the conveyor belt, and the conveyor belt is provided with negative pressure holes. The vacuum adsorption plate is used to provide negative pressure and adsorb the pole piece on the conveyor belt through the gaps between the negative pressure holes.

8. The pole piece cutting device according to claim 7, characterized in that: The conveyor belt includes a first portion of the conveyor belt and a second portion of the conveyor belt that are connected. The first portion of the conveyor belt and the second portion of the conveyor belt are respectively located on both sides of the laser cutter. The electrode placed on the first portion of the conveyor belt is connected to the electrode raw material, and the electrode placed on the second portion of the conveyor belt is configured as a cut electrode. The negative pressure holes include a first portion of negative pressure holes and a second portion of negative pressure holes. The first portion of the negative pressure holes are located on the first portion of the conveyor belt, and the second portion of the negative pressure holes are located on the second portion of the conveyor belt.

9. The pole piece cutting device according to any one of claims 1 to 6, characterized in that: The laser cutter includes a laser transmitter and a laser moving platform for moving the laser transmitter, wherein the laser moving platform is configured to move on one side of the upper surface of the conveyor belt.

10. The pole piece cutting device according to claim 1, characterized in that: The pole piece cutting device further comprises a dust collector, and the dust collector is arranged corresponding to the laser cutter.

11. A battery pole piece thermal composite equipment, characterized in that: It comprises the pole piece cutting device as described in any one of claims 1 to 10, and the pole piece cutting device is used for cutting positive pole pieces or negative pole pieces.

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