Slitting system for lithium battery coating tape

Abstract

The invention provides a lithium battery coating tape slitting system which comprises a first slitting tool bit, a second slitting tool bit, a first process deviation rectifying roller set, a second process deviation rectifying roller set, a passing roller, a front adjusting guide roller, a rear adjusting guide roller, a powder brushing device and a winding device, and the first process deviation rectifying roller set is arranged at the front end of the first slitting tool bit; the second process deviation rectifying roller set is arranged at the front end of the second slitting tool bit and arranged at the rear end of the first slitting tool bit. The front adjusting guide roller and the rear adjusting guide roller are arranged at the input end and the output end of the first slitting tool bit respectively and arranged at the input end and the output end of the second slitting tool bit respectively. The powder brushing device and the winding device are arranged at the rear end of the second slitting tool bit; the invention further comprises a working process of the slitting system for the lithium battery coating tape. According to the pole piece slitting device, the slitting working efficiency and the product yield can be effectively improved, the coating size consistency of the slit pole piece is guaranteed, and subsequent continuous production is facilitated.

Description

Technical Field

[0001] The invention relates to a processing scheme for a lithium battery coated tape, and in particular to a slitting system for a lithium battery coated tape. Background Art

[0002] With the development of science and technology, lithium batteries have been widely used and have become the mainstream power source. In the production process of lithium batteries, the coating and slitting process has a significant impact on its quality. The existing slitting method generally uses three heads for slitting. This simple slitting scheme makes it very easy for wrinkles or scratches to appear on the surface of the coated tape after cutting. More seriously, there may even be problems such as slanted cuts, which in turn affects the production yield of the product and causes waste of raw materials; the coated tape is also called coated pole piece or pole piece. In addition, due to the differences in the standards of the coated tape, the existing simple slitting scheme cannot ensure that the coating size of the pole piece remains consistent after slitting. Workers will spend a lot of time distinguishing coatings of different specifications and models, which reduces the efficiency of slitting. In addition, due to the problems of unstable quality and inconsistent size, it will also affect the continuity of subsequent production. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a slitting system for lithium battery coating tape, which aims to improve the slitting work efficiency and product yield, and further ensure the consistency of the coating size of the electrode after slitting, which is conducive to subsequent continuous production.

[0004] To this end, the present invention provides a slitting system for a lithium battery coating tape, comprising: a first slitting head, a second slitting head, a first process deviation correction roller group, a second process deviation correction roller group, a passing roller, a front adjustment guide roller, a rear adjustment guide roller, a powder brushing device and a winding device, wherein the first process deviation correction roller group is arranged at the front end of the first slitting head; the second process deviation correction roller group is arranged at the front end of the second slitting head and at the rear end of the first slitting head; the front adjustment guide roller and the rear adjustment guide roller are respectively arranged at the input end and the output end of the first slitting head, and are respectively arranged at the input end and the output end of the second slitting head; the powder brushing device and the winding device are arranged at the rear end of the second slitting head; The working process of the slitting system of the lithium battery coating tape comprises the following steps: Step S1, the alternately coated electrode piece first passes through the first process deviation correction roller group, the passing roller and the front adjustment guide roller to enter the first slitting head, and is adjusted to the preset first slitting position through the cooperation of the front adjustment guide roller and the rear adjustment guide roller; the alternately coated electrode piece refers to the electrode piece obtained by alternately coating the blank area and the coating area in sequence; Step S2, cutting the electrode piece for the first time by the first cutting blade, the cutting position is the blank area between two adjacent coating areas, and the electrode piece after the first cutting is arranged in a staggered manner downward and upward by the rear adjustment guide roller and the guide roller to obtain the first cut electrode piece staggered downward and upward; Step S3, the first slit pole pieces staggered downward and upward respectively pass through the second process correcting roller group and the guide roller to enter the second slitting cutter head, and during the correcting process of the second process correcting roller group, the spacing between each group of first slit pole pieces is kept within a preset width range, and the preset width range is 1-2 mm; Step S4, the first slitting pole pieces staggered downward and upward are respectively passed through the guide roller and the front adjustment guide roller to enter the second slitting blade head, and are adjusted to the preset second slitting position through the cooperation of the front adjustment guide roller and the rear adjustment guide roller; Step S5, cutting the first cut electrode piece for a second time by the second cutting blade head, the cutting position is the center axis of the current first cut electrode piece, and the electrode piece after the second cutting is arranged in a staggered manner downward and upward by the rear adjustment guide roller and the guide roller to obtain a second cut electrode piece arranged in a staggered manner downward and upward; Step S6, winding up the second split electrode sheets which are staggered downward and upward respectively through the corresponding guide rollers, powder brushing devices and winding devices.

[0005] A further improvement of the present invention lies in that, in the step S3, among the first slitting pole pieces arranged alternately downward and upward, the first slitting pole piece arranged upward is connected to the second process correcting roller group above through a plurality of guide rollers for correcting treatment, and enters the second slitting head through the guide rollers after the correcting treatment; the first slitting pole piece arranged downward is connected to the second process correcting roller group below through a plurality of guide rollers for correcting treatment, and enters the second slitting head through the guide rollers after the correcting treatment, and the spacing between each group of first slitting pole pieces is maintained at a preset width.

[0006] A further improvement of the present invention is that the arrangement direction of the upper second process deviation correcting roller group is perpendicular to the arrangement direction of the lower second process deviation correcting roller group.

[0007] A further improvement of the present invention is that it also includes an operating channel, which is arranged between the first slitting head and the first process correcting roller group, and between the first slitting head and the second process correcting roller group.

[0008] A further improvement of the present invention is that at the output ends of the first slitting head and the second slitting head, the pole pieces after the first slitting are alternately guided and adjusted downward and upward in sequence by at least two rear adjustment guide rollers, the front rear adjustment guide roller is used for downward offset guidance and adjustment, and the rear rear adjustment guide roller is used for upward guidance and adjustment.

[0009] A further improvement of the present invention is that the top height of the front rear adjusting guide roller is lower than the bottom height of the rear rear adjusting guide roller.

[0010] A further improvement of the present invention is that the first slitting head and the second slitting head share a slitting machine head.

[0011] A further improvement of the present invention is that in the step S1, the first process correcting roller group scans the coating edge on one side of the alternately coated electrode piece, and uses this coating edge as the reference data for monitoring, and the electrode piece is controlled in real time by the first process correcting roller group to keep the cutting position of the blank area by the first slitting head consistent with the reference data.

[0012] A further improvement of the present invention is that in step S2, the pole pieces after the first cutting are arranged in a manner of staggered downward and upward to obtain two first cut pole pieces staggered downward and one upward; in step S5, the pole pieces after the second cutting are arranged in a manner of staggered downward and upward to obtain three second cut pole pieces staggered downward and three upward.

[0013] A further improvement of the present invention is that in step S6, the second split pole pieces staggered downward are connected to the upper winding device via the guide rollers and powder brushing device at the bottom, and the second split pole pieces staggered upward are connected to the upper winding device via the guide rollers and powder brushing device at the top, thereby forming an independent winding system that is synchronized up and down in the vertical space.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: for the pole pieces that are coated alternately in sequence according to the blank area and the coating area, with the cooperation of the first process correcting roller group, the passing roller, the front adjusting guide roller and the rear adjusting guide roller, the first cutting is first performed by the first slitting head to obtain the first cut pole pieces that are staggered downward and upward; then, with the cooperation of the second process correcting roller group, the passing roller, the front adjusting guide roller and the rear adjusting guide roller, the spacing between each group of first cut pole pieces is maintained to reach a preset width to avoid the interference of the edge of the coating tape after slitting, and to avoid mutual interference of the pole pieces after slitting, and the second cutting is performed by the second slitting head to obtain the second cut pole pieces that are staggered downward and upward to avoid problems such as powder falling caused by scratching the edge of the coating tape after slitting, and finally, they are synchronously and independently wound up. Therefore, the present invention can slit the alternately coated pole pieces into multiple pieces through two coordinated slitting processes, thereby effectively improving the slitting work efficiency and product yield; on this basis, through process correction, adjustment of guide rollers and the coordination of slitting heads, the coating size consistency of the pole pieces after slitting is ensured during the slitting process of the same batch, which is beneficial to subsequent continuous production. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the system structure of an embodiment of the present invention; Figure 2 Schematic diagram of the first cutting of a pole piece in one embodiment of the present invention; Figure 3 is a schematic diagram of the second cutting of a pole piece in one embodiment of the present invention; Figure 4 It is a schematic diagram of the cutting of a pole piece during the one-to-six cutting process in one embodiment of the present invention; Figure 5 It is a partial schematic diagram of a pole piece in a one-to-six slicing process according to an embodiment of the present invention; Figure 6 yes Figure 5 Schematic diagram of the enlarged structure of A. DETAILED DESCRIPTION

[0016] In the description of the present invention, if it involves a description of orientation, for example, the orientation or position relationship indicated by "upper", "lower", "front", "back", "left", "right", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. If a certain technical feature is referred to as "set", "fixed", "connected", or "installed" on another technical feature, it can be directly set, fixed, or connected to the other technical feature, or it can be indirectly set, fixed, connected, or installed on the other technical feature.

[0017] In the description of the present invention, if "several" is involved, it means more than one; if "multiple" is involved, it means more than two; if "greater than", "less than", or "exceed" is involved, it should be understood as not including the number itself; if "above", "below", or "within" is involved, it should be understood as including the number itself. If "first", "second", etc. are involved, they should be understood as being used only to distinguish the names of the same or similar technical features, and should not be understood as implying / indicating the relative importance of the technical features, the number of the technical features, or the order of the technical features.

[0018] The preferred embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0019] like Figures 1 to 6 As shown, this embodiment provides a slitting system for a lithium battery coated tape, comprising: a first slitting head 1, a second slitting head 2, a first process deflection correction roller group 3, a second process deflection correction roller group 4, a passing roller 5, a front adjustment guide roller 6, a rear adjustment guide roller 7, a powder brushing device 9 and a winding device 10, wherein the first process deflection correction roller group 3 is arranged at the front end of the first slitting head 1; the second process deflection correction roller group 4 is arranged at the front end of the second slitting head 2, and is arranged at the rear end of the first slitting head 1; the front adjustment guide roller 6 and the rear adjustment guide roller 7 are respectively arranged at the input end and the output end of the first slitting head 1, and are respectively arranged at the input end and the output end of the second slitting head 2; the powder brushing device 9 and the winding device 10 are arranged at the rear end of the second slitting head 2; the working process of the slitting system for the lithium battery coated tape includes steps S1 to S6.

[0020] Among them, in the step S1, the alternately coated pole piece 11 first passes through the first process deviation correction roller group 3, the roller 5 and the front adjustment guide roller 6 to enter the first slitting head 1, and is adjusted to the preset first slitting position through the cooperation of the front adjustment guide roller 6 and the rear adjustment guide roller 7; the alternately coated pole piece 11 refers to the pole piece 11 obtained by alternately coating the blank area 12 and the coating area 13 in sequence, that is, the coating belt of the lithium battery, such as Figure 2 As shown; the first slitting position refers to the slitting position when the pole piece 11 enters the first slitting head 1, and is preferably defaulted to the central axis of the blank area 12. The first process correction roller group 3 preferably adopts a real-time correction double-roller module based on the CCD detection method, that is, it is preferably adopted based on the industrial visual inspection system to achieve double-roller process correction; the second process correction roller group 4 improved later also preferably adopts a real-time correction double-roller module based on the CCD detection method. The widths of the blank area 12 are L1, L6, L7 and L2, respectively, and the widths of the coating area 13 are L3, L4 and L5, respectively. Preferably, when coating alternately, L6=L7=L1×2=L2×2; L3=L4=L5.

[0021] Step S2, the electrode sheet 11 is cut for the first time by the first cutting blade 1, and the cutting position is the blank area 12 between two adjacent coating areas 13, preferably the central axis of the blank area 12 by default. At the first cutting blade 1, the cutting blade will be along Figure 2 The dotted lines shown cut the alternately coated pole pieces 11, and preferably cut a complete pole piece 11 from the blank area 12 into three groups of first cut pole pieces 1101, such as Figure 4 and Figure 5 As shown; and the pole pieces after the first slitting are arranged in a staggered manner downward and upward through the rear adjustment guide rollers 7 and guide rollers 5 to obtain the first slitting pole pieces 1101 arranged in a staggered manner downward and upward, and the number of the first slitting pole pieces 1101 is preferably three groups; in order to avoid interference caused by repeated contact between the edges of the pole pieces 11 after slitting, after the first slitting pole piece 1101 leaves the first slitting blade 1, the three first slitting pole pieces 1101 are staggered in a "down, up, down" manner. It is worth noting that in the process of arranging the pole pieces after the first slitting through the rear adjustment guide rollers 7 and guide rollers 5 in a staggered manner downward and upward, the upward pulling height is less than the downward pulling height, so as to make full use of the vertical space below to increase the staggered space downward and upward, improve the space utilization rate and ensure the effectiveness of the staggered arrangement.

[0022] Step S3, the first slit pole pieces 1101 staggered downward and upward respectively pass through the second process correction roller group 4 and the guide roller 5 to enter the second slitting blade head 2, and during the correction process of the second process correction roller group 4, the spacing L8 between each group of first slit pole pieces 1101 is maintained to be within the preset width range, and the preset width range is 1-2mm by default. Figures 4 to 6 As shown, the spacing L8 between each group of first-cut pole pieces 1101 refers to the separation gap width achieved after the separation is achieved through the second process correction roller group 4. The separation gap width needs to be within a preset width range. The preset width range can be adjusted according to actual conditions and needs. The default is 1-2mm, so that there will be no contact or interference between adjacent first-cut pole pieces 1101, so as to effectively prevent burrs, scratches, friction tears and other problems caused by friction or interference between adjacent first-cut pole pieces 1101, and at the same time, the control difficulty of the subsequent second cutting will not be increased due to the excessive width of the separation gap.

[0023] It should be noted that the implementation process of keeping the spacing L8 between each group of first split pole pieces 1101 within the preset width range during the deviation correction process of the deviation correction roller group 4 in step S3 includes the following sub-steps: Step S301, real-time detection of whether the spacing L8 between each group of first split pole pieces 1101 reaches the lowest threshold of the preset width range, if yes, jump to step S302; if no, step-by-step control is performed to increase the spacing L8 between each group of first split pole pieces 1101, and return to real-time detection of whether the spacing L8 between each group of first split pole pieces 1101 reaches the lowest threshold of the preset width range; the lowest threshold refers to the minimum value of the preset width range, which is 1 mm by default; Step S302, real-time detection of whether the spacing L8 between each group of first split pole pieces 1101 is greater than the highest threshold of the preset width range, if so, jump to step S303; if not, it means that the spacing L8 between each group of first split pole pieces 1101 has met the requirements, at this time, it is only necessary to keep the spacing L8 between each group of first split pole pieces 1101 unchanged, jump to step S4; the highest threshold refers to the maximum value of the preset width range, which is 2mm by default; Step S303, step-by-step control to reduce the spacing L8 between each group of first-cut pole pieces 1101, and return to real-time detection whether the spacing L8 between each group of first-cut pole pieces 1101 is greater than the highest threshold of the preset width range, until no, then keep the current spacing L8 between each group of first-cut pole pieces 1101 unchanged, and jump to step S4.

[0024] When the present embodiment adopts a step-by-step method to control the spacing L8 between each group of first-cut pole pieces 1101, the default step-by-step adjustment amplitude is 0.5 mm. The adjustment amplitude can be adjusted according to actual needs. Preferably, half of the difference between the lowest threshold and the highest threshold is adopted to avoid the disadvantage of spacing adjustment failure due to errors, thereby reducing the control accuracy of the correction process.

[0025] Step S4, the first slitting pole pieces 1101 staggered downward and upward enter the second slitting blade head 2 through the guide roller 5 and the front adjustment guide roller 6 respectively, and are adjusted to the preset second slitting position through the cooperation of the front adjustment guide roller 6 and the rear adjustment guide roller 7; the second slitting position refers to the slitting position when the first slitting pole piece 1101 enters the second slitting blade head 2, and is preferably defaulted to the central axis of the current first slitting pole piece 1101, that is, the central axis of the coating area 13, such as Figure 3 The dotted line shown is to ensure the consistency of the coating size of the electrode after slitting, which is conducive to subsequent continuous production.

[0026] Step S5, the first cut pole piece 1101 is cut for the second time by the second cutting blade 2, and the cutting position is the central axis of the current first cut pole piece 1101, so as to ensure the consistency of the coating size of the pole piece after cutting; and the pole piece after the second cutting is arranged in a staggered manner downward and upward through the rear adjustment guide roller 7 and the guide roller 5, so as to obtain the second cut pole piece 1102 arranged in a staggered manner downward and upward, so as to avoid the interference caused by repeated contact between the edges of the first cut pole piece 1101 after the second cut pole piece 1102 is obtained by cutting. Correspondingly, Figure 4 As shown, six second-cut pole pieces 1102 arranged in a staggered manner of "down, up, down..." can be obtained. It is also worth noting that in the process of arranging the pole pieces after the second slitting in a staggered manner downward and upward through the rear adjustment guide rollers 7 and 5, the upward pulling height is also smaller than the downward pulling height, so as to increase the staggered space downward and upward, improve the space utilization rate and ensure the effectiveness of the staggered arrangement.

[0027] Preferably, Figures 2 to 5 As shown, in step S2 of this embodiment, the electrode pieces after the first cutting are arranged in a manner of staggered downward and upward to obtain the first cut electrode pieces 1101 with two pieces staggered downward and one piece staggered upward; in step S5, the electrode pieces after the second cutting are arranged in a manner of staggered downward and upward to obtain the second cut electrode pieces 1102 with three pieces staggered downward and three pieces staggered upward, thereby effectively realizing the one-to-six cutting process.

[0028] Step S6, the second slit pole pieces 1102 staggered downward and upward are respectively wound up through the corresponding guide rollers 5, powder brushing devices 9 and winding devices 10. Preferably, in step S6 described in this embodiment, the second slit pole pieces 1102 staggered downward are connected to the winding device 10 above through the guide rollers 5 and powder brushing devices 9 below, and the second slit pole pieces 1102 staggered upward are connected to the winding device 10 above through the guide rollers 5 and powder brushing devices 9 above, forming an independent winding system synchronized up and down in the vertical space, and thus completing the complete slitting process.

[0029] Preferably, in the step S3 of the present embodiment, among the first slitting pole pieces 1101 arranged alternately downward and upward, the upward first slitting pole piece 1101 is connected to the upper second process correcting roller group 4 through a plurality of guide rollers 5 for correcting treatment, and enters the second slitting blade head 2 through the guide rollers 5 after the correcting treatment; the downward first slitting pole piece 1101 is connected to the lower second process correcting roller group 4 through a plurality of guide rollers 5 for correcting treatment, and enters the second slitting blade head 2 through the guide rollers 5 after the correcting treatment, and the spacing between each group of first slitting pole pieces 1101 is maintained at a preset width L8, thereby being able to utilize the guiding effect of the guide rollers 5 to reduce the footprint of the equipment and ensure independent correcting treatment of the upper and lower groups of first slitting pole pieces 1101. Therefore, this embodiment performs separate detection in the deviation correction detection section and common slitting in the slitting section, which can effectively avoid the problem of setting up multiple slitting heads above and below. The first slitting head 1 and the second slitting head 2 can share one slitting head, thereby effectively saving costs and avoiding the problem of interlaced complexity and mutual interference of the coated tape after setting up two upper and lower slitting machines for slitting. The overall design is more reasonable and efficient.

[0030] Preferably, the arrangement direction of the second process correcting roller group 4 above in this embodiment is perpendicular to the arrangement direction of the second process correcting roller group 4 below, so that after separate correction detection, they can enter the same slitting head for common slitting, so as to rationally design the direction of the coating tape.

[0031] Preferably, Figure 1 As shown, this embodiment further includes an operation channel 8, which is arranged between the first slitting head 1 and the first process correcting roller group 3, and between the first slitting head 1 and the second process correcting roller group 4. In this embodiment, an operation platform is preferably reserved through the operation channel 8, which can be used to solve the problem of difficulty in threading, facilitate operation, and facilitate equipment maintenance.

[0032] Preferably, Figure 1As shown, in this embodiment, at the output end of the first slitting blade head 1 and the second slitting blade head 2, at least two rear adjustment guide rollers 7 are used to alternately guide and adjust the pole pieces after the first slitting in a downward and upward offset manner. The front rear adjustment guide roller 7 is used to achieve downward offset guidance and adjustment, and the rear rear adjustment guide roller 7 is used to achieve upward guidance and adjustment. In addition, the top height of the front rear adjustment guide roller 7 is lower than the bottom height of the rear rear adjustment guide roller 7, so as to better ensure that the multiple first slitting pole pieces 1101 will not interfere with each other, and the multiple second slitting pole pieces 1102 will not interfere with each other.

[0033] Preferably, in the step S1 of the present embodiment, the first process correcting roller group 3 scans the coating edge of one side of the alternately coated electrode 11, and uses this coating edge as the reference data for monitoring, and the electrode 11 is controlled in real time by the first process correcting roller group 3, so that the cutting position of the blank area 12 of the first cutting head 1 is kept consistent with the reference data, thereby further ensuring the coating size consistency of the electrode after cutting.

[0034] To summarize, in this embodiment, with respect to the electrode 11 which is coated alternately in sequence according to the blank area 12 and the coating area 13, the first slitting is first performed by the first slitting head 1 with the cooperation of the first process correcting roller group 3, the passing roller 5, the front adjusting guide roller 6 and the rear adjusting guide roller 7, so as to obtain the first slitting electrode 1101 which is staggered downward and upward; then, with the cooperation of the second process correcting roller group 4, the passing roller 5, the front adjusting guide roller 6 and the rear adjusting guide roller 7, the spacing between each group of first slitting electrode 1101 is maintained to reach a preset width to avoid the interference of the edge of the coating tape after slitting and the mutual interference of the electrode pieces after slitting, and the second slitting is performed by the second slitting head 2 to obtain the second slitting electrode 1102 which is staggered downward and upward to avoid the problem of powder falling caused by the scratching of the edge of the coating tape after slitting, and finally, they are synchronously and independently wound up respectively. Therefore, this embodiment can cut the alternately coated electrode 11 into multiple pieces through two coordinated cutting processes, thereby effectively improving the cutting work efficiency and product yield; on this basis, through process correction, adjustment of guide rollers and the cooperation of the slitting head, the coating size consistency of the electrode after slitting is ensured during the slitting process of the same batch, which is beneficial to subsequent continuous production.

[0035] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A slitting system for lithium battery coating tape, characterized in that: include: A first slitting head (1), a second slitting head (2), a first process deflection correction roller group (3), a second process deflection correction roller group (4), a passing roller (5), a front adjustment guide roller (6), a rear adjustment guide roller (7), a powder brushing device (9) and a winding device (10), wherein the first process deflection correction roller group (3) is arranged at the front end of the first slitting head (1); the second process deflection correction roller group (4) is arranged at the front end of the second slitting head (2) and at the rear end of the first slitting head (1); the front adjustment guide roller (6) and the rear adjustment guide roller (7) are respectively arranged at the input end and the output end of the first slitting head (1) and are respectively arranged at the input end and the output end of the second slitting head (2); the powder brushing device (9) and the winding device (10) are arranged at the rear end of the second slitting head (2); The working process of the slitting system of the lithium battery coating tape comprises the following steps: Step S1, the alternately coated pole piece (11) first passes through the first process deviation correction roller group (3), the passing roller (5) and the front adjustment guide roller (6) to enter the first slitting blade head (1), and is adjusted to a preset first slitting position through the cooperation of the front adjustment guide roller (6) and the rear adjustment guide roller (7); the alternately coated pole piece (11) refers to the pole piece (11) obtained by alternately coating the blank area (12) and the coating area (13) in sequence; Step S2, performing a first slitting of the electrode piece (11) by the first slitting blade head (1), wherein the slitting position is a blank area (12) between two adjacent coating areas (13), and the electrode piece after the first slitting is arranged in a staggered manner downward and upward by the rear adjustment guide roller (7) and the guide roller (5), so as to obtain a first slitting electrode piece (1101) arranged in a staggered manner downward and upward; Step S3, the first slit pole pieces (1101) arranged alternately downward and upward respectively pass through the second process deflection correction roller group (4) and the guide roller (5) to enter the second slitting blade head (2), and during the deflection correction process of the second process deflection correction roller group (4), the spacing between each group of first slit pole pieces (1101) is maintained to be within a preset width range, wherein the preset width range is 1-2 mm; Step S4, the first slitting pole pieces (1101) arranged alternately downward and upward are respectively passed through the guide roller (5) and the front adjustment guide roller (6) to enter the second slitting blade head (2), and are adjusted to a preset second slitting position through the cooperation of the front adjustment guide roller (6) and the rear adjustment guide roller (7); Step S5, performing a second slitting of the first slitting electrode piece (1101) by means of the second slitting blade head (2), the slitting position being the center axis of the current first slitting electrode piece (1101), and arranging the electrode piece after the second slitting in a staggered manner downward and upward through the rear adjustment guide roller (7) and the guide roller (5), so as to obtain a second slitting electrode piece (1102) arranged in a staggered manner downward and upward; Step S6, the second split pole pieces (1102) arranged alternately downward and upward are rolled up through the corresponding guide rollers (5), powder brushing devices (9) and rolling devices (10).

2. The lithium battery coating tape slitting system according to claim 1, characterized in that: In the step S3, among the first slit pole pieces (1101) arranged alternately downward and upward, the first slit pole piece (1101) pointing upward is connected to the second process deflection correction roller group (4) above through a plurality of guide rollers (5) for deflection correction treatment, and after the deflection correction treatment, it enters the second slitting blade head (2) through the guide roller (5); the first slit pole piece (1101) pointing downward is connected to the second process deflection correction roller group (4) below through a plurality of guide rollers (5) for deflection correction treatment, and after the deflection correction treatment, it enters the second slitting blade head (2) through the guide roller (5), and the spacing between each group of first slit pole pieces (1101) is maintained to a preset width.

3. The slitting system for lithium battery coating tape according to claim 2, characterized in that: The arrangement direction of the upper second process deviation correction roller group (4) is perpendicular to the arrangement direction of the lower second process deviation correction roller group (4).

4. The slitting system for lithium battery coating tape according to any one of claims 1 to 3, characterized in that: It also comprises an operating channel (8), wherein the operating channel (8) is arranged between the first slitting head (1) and the first process deviation correction roller group (3), and between the first slitting head (1) and the second process deviation correction roller group (4).

5. The slitting system for lithium battery coating tape according to any one of claims 1 to 3, characterized in that: At the output ends of the first slitting head (1) and the second slitting head (2), the pole pieces after the first slitting are sequentially and alternately guided and adjusted in a downward and upward offset manner by at least two rear adjustment guide rollers (7), the front rear adjustment guide roller (7) being used to achieve downward offset guidance and adjustment, and the rear rear adjustment guide roller (7) being used to achieve upward guidance and adjustment.

6. The lithium battery coating tape slitting system according to any one of claims 1 to 3, characterized in that: The top height of the front rear adjustment guide roller (7) is lower than the bottom height of the rear rear adjustment guide roller (7).

7. The lithium battery coating tape slitting system according to any one of claims 1 to 3, characterized in that: The first slitting knife head (1) and the second slitting knife head (2) share a slitting machine head.

8. The lithium battery coating tape slitting system according to any one of claims 1 to 3, characterized in that: In the step S1, the first process deflection correction roller group (3) scans the coating edge of one side of the alternately coated pole piece (11), and uses the coating edge as reference data for monitoring. The pole piece (11) is controlled in real time by the first process deflection correction roller group (3), so that the slitting position of the blank area (12) by the first slitting blade head (1) is kept consistent with the reference data.

9. The lithium battery coating tape slitting system according to any one of claims 1 to 3, characterized in that: In the step S2, the electrode pieces after the first cutting are arranged in a staggered manner downward and upward to obtain two first cut electrode pieces (1101) staggered downward and one upward; in the step S5, the electrode pieces after the second cutting are arranged in a staggered manner downward and upward to obtain three second cut electrode pieces (1102) staggered downward and three upward.

10. The lithium battery coating tape slitting system according to any one of claims 1 to 3, characterized in that: In step S6, the second split pole pieces (1102) staggered downward are connected to the upper winding device (10) via the lower guide roller (5) and the powder brushing device (9), and the second split pole pieces (1102) staggered upward are connected to the upper winding device (10) via the upper guide roller (5) and the powder brushing device (9), thereby forming an independent winding system that is synchronized up and down in the vertical space.

Images