Electrode-sheet processing device

Abstract

An electrode-sheet processing device, comprising an unwinding mechanism used for unwinding and outputting a material strip, wherein a first die-cutting station and a second die-cutting station are provided in sequence downstream of the unwinding mechanism, and the first die-cutting station and the second die-cutting station are each provided with a die-cutting mechanism; the die-cutting mechanism of the first die-cutting station is configured to cut the material strip to form an intermediate strip and a first strip to be slit, which first strip is provided with a tab at either end in the direction of width; the die-cutting mechanism of the second die-cutting station corresponds to the intermediate strip on a one-to-one basis, and is used for cutting the intermediate strip into a second strip to be slit, which second strip is provided with a tab at either end in the direction of width; a first slitting station is provided downstream of the first die-cutting station, a second slitting station is provided downstream of the second die-cutting station, and the first slitting station and the second slitting station are each provided with a slitting mechanism; and slitting mechanisms correspond to electrode sheet strips on a one-to-one basis, the slitting mechanism of the first slitting station is configured to cut said first strip to form two first electrode sheet strips, and the slitting mechanism of the second slitting station is configured to cut said second strip to form two second electrode sheet strips.

Description

Pole piece processing device

[0001] The present patent application claims priority to the utility model patent application with the title of "Pole piece processing device", application number 202420788956.1, filed on April 16, 2024, which is hereby incorporated by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of lithium battery manufacturing equipment, in particular to a pole piece processing device. BACKGROUND

[0003] Lithium ion batteries have the characteristics of high working voltage, large specific energy, small size, light weight, long cycle life, low self-discharge rate, no memory effect and no pollution, which are favored by many power equipment manufacturers.

[0004] In the preparation process of lithium ion batteries, the preparation of pole pieces is an important link. When preparing pole pieces, a pre-cutting machine is often used to cut one-out-four or one-out-six positive / negative electrode material belts into one-out-two material belts. Then a die-cutting mechanism is used to die-cut the material belts into material belts with target size of pole tabs, and then a cutting mechanism is used to cut the material belts into target width material belts. After cutting into target width material belts, the material belts are introduced into different winding paths for winding.

[0005] The above-mentioned pole piece preparation method involves many devices, resulting in a complex structure; the long process flow makes the production efficiency low. At the same time, the material belt is subjected to multiple feeding and running, which also reduces the direct pass rate of finished batteries, thereby increasing the production cost of batteries. SUMMARY

[0006] Therefore, it is necessary to provide a pole piece processing device capable of improving the above-mentioned problems.

[0007] A pole piece processing device, comprising:

[0008] A unwinding mechanism for unwinding and outputting a material belt;

[0009] A first die-cutting station and a second die-cutting station are sequentially arranged downstream of the unwinding mechanism, and the first die-cutting station and the second die-cutting station are each provided with a die-cutting mechanism; the die-cutting mechanism of the first die-cutting station is used to cut the material belt to form a first cutting-to-be-cut belt and an intermediate belt each having a pole tab at both ends in the width direction; the die-cutting mechanism of the second die-cutting station corresponds to the intermediate belt one-to-one, and is used to cut the intermediate belt into a second cutting-to-be-cut belt each having a pole tab at both ends in the width direction;

[0010] The first slitting station is provided downstream of the first die-cutting station, and the second slitting station is provided downstream of the second die-cutting station. The slitting mechanism is provided in the first slitting station and the second slitting station, and is in one-to-one correspondence with the pole piece belt. The slitting mechanism in the first slitting station is used to cut the first to-be-slitted belt to form two first pole piece belts, and the slitting mechanism in the second slitting station is used to cut the second to-be-slitted belt to form two second pole piece belts.

[0011] The pole piece processing device can cut the belt into a plurality of pole piece belts (at least four pole piece belts) by itself. Compared with the prior art pole piece preparation method (the belt is first cut into a one-out-two belt, then die-cut to form a to-be-slitted belt, and finally cut to form a pole piece belt), the pole piece processing device does not need to pre-cut the belt into a one-out-two belt, that is, the pre-cutting process is omitted, the device structure is simple, the production process is short, and the production efficiency is improved. At the same time, the number of belt feeding and running can be reduced, the direct pass rate of finished batteries is improved, and the production cost of the batteries is reduced. Moreover, the pole piece processing device can cut the belt into a plurality of pole piece belts (more than four pole piece belts) by using two die-cutting stations and two slitting stations, so that the land area of the entire device can be greatly reduced, and the miniaturization of the device can be facilitated.

[0012] In one of the embodiments, each die-cutting mechanism includes two lasers, and the two lasers are respectively used to cut the pole tabs at both ends of the to-be-slitted belt.

[0013] In one of the embodiments, the first die-cutting station and the first slitting station are respectively provided with one die-cutting mechanism and one slitting mechanism; the second die-cutting station and the second slitting station are respectively provided with two die-cutting mechanisms and two slitting mechanisms; or

[0014] The first die-cutting station and the second die-cutting station are respectively provided with one die-cutting mechanism, and the first slitting station and the second slitting station are respectively provided with one slitting mechanism.

[0015] In one of the embodiments, each slitting mechanism includes a first cutter and a second cutter, the first cutter and the second cutter are respectively arranged at both ends in the thickness direction of the to-be-slitted belt, and cut the to-be-slitted belt in cooperation.

[0016] In one of the embodiments, the pole piece processing device further comprises a first deviation rectifying mechanism, which is arranged between the unwinding mechanism and the first die-cutting station, and used for rectifying the deviation of the material belt.

[0017] In one of the embodiments, the pole piece processing device further comprises a second deviation rectifying mechanism, which is arranged between the first die-cutting station and the first slitting station, and / or between the second die-cutting station and the second slitting station, and used for rectifying the deviation of the to-be-slitted belt.

[0018] In one of the embodiments, the pole piece processing device further comprises a belt separating mechanism, which is arranged downstream of the first slitting station and / or the second slitting station, and used for separating the two pole piece belts formed by the to-be-slitted belt.

[0019] In one of the embodiments, the pole piece processing device further comprises a tensioning mechanism, which is arranged between the unwinding mechanism and the die-cutting station, and / or between the die-cutting station and the slitting station, and used for tensioning the material belt and / or the to-be-slitted belt.

[0020] In one of the embodiments, the pole piece processing device further comprises a winding mechanism, which is used for winding the pole piece belt.

[0021] In one of the embodiments, the pole piece processing device comprises two winding mechanisms, the pole piece belt with the first end having the pole tab is wound on one of the winding mechanisms, and the pole piece belt with the second end having the pole tab is wound on the other winding mechanism; the first end and the second end are opposite in the width direction. BRIEF DESCRIPTION OF DRAWINGS

[0022] FIG. 1 is a structural schematic diagram of a pole piece processing device according to an embodiment of the present application;

[0023] FIG. 2 is a flowchart of cutting a material belt to form a pole piece belt by using the pole piece processing device shown in FIG. 1;

[0024] FIG. 3 is a flowchart of cutting another material belt to form a pole piece belt by using the pole piece processing device shown in FIG. 1.

[0025] Explanation of reference signs: 100, pole piece processing device; 10, unwinding mechanism; 20, die cutting mechanism; 30, slitting mechanism; 31, first cutter; 32, second cutter; 40, first deviation rectifying mechanism; 50, second deviation rectifying mechanism; 60, tensioning mechanism; 70, separating mechanism; 80, winding mechanism; 90, combining mechanism; A1, first die cutting station; A2, second die cutting station; B1, first slitting station; B2, second slitting station; 200, material belt; 201, coating area; 202, blank area; 300, intermediate belt; 400, first to-be-slitted belt; 500, second to-be-slitted belt; 600, first pole piece belt; 700, second pole piece belt; 800, pole lug. DETAILED DESCRIPTION

[0026] In order to make the above objectives, characteristics and advantages of the present application more apparent, a detailed description of the specific embodiments of the present application will be given below with reference to the accompanying drawings. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many different ways other than those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0027] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0028] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0029] In this application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0030] In this application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0031] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only embodiment.

[0032] Referring to FIG. 1, an embodiment of the present application provides a pole piece processing device 100, which comprises a unwinding mechanism 10 for unwinding and outputting a material belt 200 so as to facilitate the material belt 200 to be developed at the subsequent work station. Specifically, the unwinding mechanism 10 has a tension control function to ensure that the tension of the material belt 200 meets the requirements. The material belt 200 is a base material belt which has not been cut to form a pole lug 800. The material belt 200 has at least two coating areas 201, and each coating area 201 is provided with a blank area 202 at both ends in the width direction. Among them, the width direction is perpendicular to the conveying direction (length direction) of the material belt 200.

[0033] Continuing to refer to FIG. 1, downstream of the unwinding mechanism 10 are sequentially provided a first die-cutting station A1 and a second die-cutting station A2. That is, the first die-cutting station A1 and the second die-cutting station A2 are both downstream of the unwinding mechanism 10, and the second die-cutting station A2 is downstream of the first die-cutting station A1. In this way, the material tape 200 unwound and output by the unwinding mechanism 10 first passes through the first die-cutting station A1 and then reaches the second die-cutting station A2. The pole piece processing device 100 further includes a plurality of die-cutting mechanisms 20, and the first die-cutting station A1 and the second die-cutting station A2 are both provided with die-cutting mechanisms 20. That is, part of the die-cutting mechanisms 20 are provided in the first die-cutting station A1, and the remaining part are provided in the second die-cutting station A2. The die-cutting mechanisms 20 of the first die-cutting station A1 cut the material tape 200 to form the first to-be-cutting tape 400 and the intermediate tape 300, both ends of which in the width direction have the tabs 800. The number of the die-cutting mechanisms 20 of the second die-cutting station A2 is equal to and corresponds to the number of the intermediate tapes 300, and the die-cutting mechanisms 20 of the second die-cutting station A2 are used to cut the corresponding intermediate tapes 300 to form the second to-be-cutting tape 500, both ends of which in the width direction have the tabs 800.

[0034] It should be noted that the cutting track of the die-cutting mechanism 20 is a continuous cutting track. In this way, when the material tape 200 is in the first die-cutting station A1, the die-cutting mechanism 20 located in the first die-cutting station A1 can cut the material tape 200 to form the first to-be-cutting tape 400 and the intermediate tape 300. Among them, the first to-be-cutting tape 400 and the second to-be-cutting tape 500 are the pole piece material tapes with tabs 800 and to be cut, and the intermediate tape 300 is the precursor of the to-be-cutting tape, and no tabs 800 are formed thereon. It should also be noted that the die-cutting mechanism 20 cuts in the blank area 202 to cut off part of the blank area 202, and the part finally remaining on the to-be-cutting tape forms the tabs 800.

[0035] The above arrangement is that after the material tape 200 unwound and output by the unwinding mechanism 10 reaches the first die-cutting station A1, the die-cutting mechanism 20 located in the first die-cutting station A1 cuts the material tape 200 into the first to-be-cutting tape 400 and the intermediate tape 300. At this time, the first to-be-cutting tape 400 is the pole piece material tape to be cut, and the next process is performed to cut to form a pole piece tape (described below). The intermediate tape 300 without tabs 800 is transported to the second die-cutting station A2, and the die-cutting mechanism 20 located in the second die-cutting station A2 cuts the intermediate tape 300 into the second to-be-cutting tape 500. At this time, the second to-be-cutting tape 500 is also the pole piece material tape to be cut, and the next process is performed to cut to form a pole piece tape.

[0036] Further, continuing to refer to FIG. 1, downstream of the first die-cutting station A1 is provided with a first slitting station B1, and downstream of the second die-cutting station A2 is provided with a second slitting station B2. The tab processing device 100 comprises a plurality of slitting mechanisms 30, and the first slitting station B1 and the second slitting station B2 are each provided with a slitting mechanism 30, that is, part of the total slitting mechanisms 30 are provided in the first slitting station B1, and the remaining part are provided in the second slitting station B2. The number of slitting mechanisms 30 is equal to and corresponds to the number of the to-be-slitted tapes, specifically, the number of slitting mechanisms 30 of the first slitting station B1 is equal to and corresponds to the number of the first to-be-slitted tapes 400, and the number of slitting mechanisms 30 of the second slitting station B2 is equal to and corresponds to the number of the second to-be-slitted tapes 500. The slitting mechanisms 30 of the first slitting station B1 are used to cut the first to-be-slitted tapes 400 to form two first tab tapes 600, and the slitting mechanisms 30 of the second slitting station B2 are used to cut the second to-be-slitted tapes 500 to form two second tab tapes 700.

[0037] It should be noted that the slitting mechanisms 30 cut in the coating area 201 so that the two ends of the to-be-slitted tape in the width direction are separated to form a tab tape having a tab 800 at one end in the width direction.

[0038] The tab processing device 100 provided by the embodiment of the present application, after the material tape 200 passes through the first die-cutting station A1 and the second die-cutting station A2, the first to-be-slitted material tape 200 and the second to-be-slitted material tape 200 are formed, the first to-be-slitted material tape 200 is cut into the first tab tape 600 at the first slitting station B1, and the second to-be-slitted material tape 200 is cut into the second tab tape 700 at the second slitting station B2, so that the material tape 200 is finally formed into a plurality of (at least four) tab tapes. That is, the tab processing device 100 itself can cut the material tape 200 into a plurality of tab tapes, and relative to the prior art tab preparation method (the material tape 200 is first cut into a one-out-two material tape, then die-cut to form a to-be-slitted tape, and finally cut to form a tab tape), it is not necessary to divide the material tape 200 into a one-out-two material tape in advance, that is, the pre-slitting process is omitted, the device structure is simple, the production process flow is short, and the production efficiency is improved. At the same time, the number of material tape 200 feeding and running can be reduced, the straight-through rate of the finished battery is improved, and the production cost of the battery is reduced. Moreover, the tab processing device 100 can cut the material tape 200 into a plurality of (more than four) tab tapes at two die-cutting stations and two slitting stations, the number of stations is small, the floor area of the entire device can be greatly reduced, and the miniaturization of the device is facilitated.

[0039] In some embodiments, referring to FIG. 1, the first die-cutting station Al and the second die-cutting station A2 are each provided with a die-cutting mechanism 20, and the first slitting station Bl and the second slitting station B2 are each provided with a slitting mechanism 30. Referring to FIG. 2, a tape 200 having two coating areas 201 is cut by the die-cutting mechanism 20 into a first to-be-slitted tape 400 and an intermediate tape 300 (the dashed line in FIG. 2 represents the trajectory of the tabs 800, but the tabs 800 are not formed on the intermediate tape 300 at this time) when passing through the first die-cutting station Al, and the intermediate tape 300 is cut by the die-cutting mechanism 20 into a second to-be-slitted tape 500 when passing through the second die-cutting station A2. The first to-be-slitted tape 400 is cut by the slitting mechanism 30 into two first electrode tab tapes 600 when passing through the first slitting station Bl, and the second to-be-slitted tape 500 is cut by the slitting mechanism 30 into two second electrode tab tapes 700 when passing through the second slitting station B2. In this way, the electrode tab processing device 100 can cut one tape 200 into four electrode tab tapes, i.e., one tape 200 is converted into four electrode tab tapes by the electrode tab processing device 100.

[0040] In other embodiments, referring to FIG. 1, the first die-cutting station Al is provided with one die-cutting mechanism 20, and the second die-cutting station A2 is provided with two die-cutting mechanisms 20, which are arranged in sequence in the direction perpendicular to the paper surface. The first slitting station Bl is provided with one slitting mechanism 30, and the second slitting station B2 is provided with two slitting mechanisms 30, which are arranged in sequence in the direction perpendicular to the paper surface. Referring to FIG. 3, a tape 200 having three coating areas 201 is cut by the die-cutting mechanism 20 of the first die-cutting station Al into a first to-be-slitted tape 400 and two intermediate tapes 300 when passing through the first die-cutting station Al. The two intermediate tapes 300 are cut by the two die-cutting mechanisms 20 of the second die-cutting station A2 into a second to-be-slitted tape 500, respectively, when passing through the second die-cutting station A2, and there are two second to-be-slitted tapes 500 at this time. As shown in FIG. 1, the two second to-be-slitted tapes 500 are arranged in sequence in the direction perpendicular to the paper surface. The first to-be-slitted tape 400 is cut by the slitting mechanism 30 into two first electrode tab tapes 600 when passing through the first slitting station Bl, and the second to-be-slitted tape 500 is cut by the slitting mechanism 30 into two second electrode tab tapes 700 when passing through the second slitting station B2, and there are four second electrode tab tapes 700 at this time. In this way, the electrode tab processing device 100 can cut one tape 200 into six electrode tab tapes, i.e., one tape 200 is converted into six electrode tab tapes by the electrode tab processing device 100.

[0041] It should be understood that in some other embodiments, according to the different numbers of coating areas 201 of the material strip 200, the number of die-cutting mechanisms 20 of the two die-cutting stations and the number of slitting mechanisms 30 of the two slitting stations are adaptively adjusted, and a material strip 200 can also be cut into more than six electrode strips, that is, the material strip 200 passes through the electrode processing device 100 to form more electrode strips (an even number greater than six, such as eight, ten, etc.).

[0042] Each die-cutting mechanism 20 includes two lasers, each used to cut the tabs 800 at both ends of the strip to be cut. It is conceivable that in other embodiments, the die-cutting mechanism 20 may also employ other structural arrangements to cut the strip 200, such as including a die-cutting blade.

[0043] 1 , each slitting mechanism 30 includes a first cutter 31 and a second cutter 32 . The first cutter 31 and the second cutter 32 are respectively disposed at two ends of the tape to be slit in the thickness direction and cooperate with each other to cut the tape to be slit.

[0044] In some embodiments, the electrode processing device 100 includes a first correcting mechanism 40, which is arranged between the unwinding mechanism 10 and the first die-cutting station A1, and is used to correct the material strip 200 to prevent the material strip 200 from deviating during transportation. The first die-cutting station A1 can accurately find the cutting position, thereby ensuring that the size of the electrode ear 800 formed after cutting meets the requirements.

[0045] Continuing to refer to Figure 1, the electrode processing device 100 also includes a second correcting mechanism 50. A second correcting mechanism 50 is provided between the first die-cutting station A1 and the first slitting station B1, and a second correcting mechanism 50 is also provided between the second die-cutting station A2 and the second slitting station B2. The second correcting mechanism 50 is used to correct the strip to be slit to prevent the strip to be slit from deviating during transportation, and to accurately find the cutting position at the slitting station, thereby ensuring that the size of the electrode strip after cutting meets the requirements.

[0046] The electrode processing device 100 also includes a tensioning mechanism 60. A tensioning mechanism 60 is provided between the unwinding mechanism 10 and the die-cutting station, and a tensioning mechanism 60 is also provided between the die-cutting station and the slitting station. The tensioning mechanism 60 is used to tension the material strip 200 and the strip to be slit to facilitate cutting of the material strip 200 and the strip to be slit.

[0047] The electrode processing device 100 also includes a tape-splitting mechanism 70. The tape-splitting mechanism 70 is provided downstream of the first slitting station B1 and / or the second slitting station B2. The tape-splitting mechanism 70 is used to separate the two electrode tapes formed by cutting the tape to be slit, thereby introducing the electrode tapes into different paths to facilitate winding in subsequent processes.

[0048] In some embodiments, the electrode processing device 100 further includes a winding mechanism 80 , which is used to wind up the electrode tape to facilitate storage of the electrode tape.

[0049] Further, with continued reference to FIG1 , the electrode processing device 100 includes two winding mechanisms 80. The electrode strips with the electrode tabs 800 at the first end are combined and wound onto one winding mechanism 80, and the electrode strips with the electrode tabs 800 at the second end are combined and wound onto the other winding mechanism 80. For example, in some specific embodiments, when the material strip 200 is in a one-out four mode, the first electrode strip and the third electrode strip from the left in FIG2 are wound onto the same winding mechanism 80, and the second electrode strip and the fourth electrode strip are wound onto the same winding mechanism 80. For example, in other specific embodiments, when the material roll 200 is in a one-out six mode, the first electrode strip, the third electrode strip, and the fifth electrode strip from the left in FIG3 are wound onto the same winding mechanism 80, and the second electrode strip, the fourth electrode strip, and the sixth electrode strip are wound onto the same winding mechanism 80. In this way, the pole piece tape is finally wound onto the two winding mechanisms 80, which reduces the number of tape runs and can lower the complexity of the equipment.

[0050] Furthermore, the electrode processing device 100 further includes a tape closing mechanism 90, which is used to merge the electrode tapes so as to reel them onto the reeling mechanism 80. Specifically, there are two tape closing mechanisms 90, which are arranged in a one-to-one correspondence with the two reeling mechanisms 80. The electrode tapes merged by the tape closing mechanism 90 are reeled onto the reeling mechanism 80.

[0051] The comparison between the one-out-four method of producing a pole piece strip using the pole piece processing device 100 provided in the embodiment of the present application and the conventional strip production is as follows:

[0052] It can be seen from the above table that the production capacity of electrode strips prepared by the one-out-four method of the electrode processing device 100 provided by the embodiment of the present application is increased by 83.3% compared with the conventional electrode strip production capacity, and the production efficiency is greatly improved.

[0053] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A pole piece processing apparatus characterized by, The application relates to a polar plate processing device. The polar plate processing device comprises a unwinding mechanism (10) for unwinding and outputting a material belt (200); downstream of the unwinding mechanism (10), a first die cutting station (A1) and a second die cutting station (A2) are sequentially arranged, and the first die cutting station (A1) and the second die cutting station (A2) are both provided with a die cutting mechanism (20); the die cutting mechanism (20) of the first die cutting station (A1) is used for cutting the material belt (200) to form a first to-be-slitting belt (400) and an intermediate belt (300) both of which have a polar lug (800) at the width direction; the die cutting mechanism (20) of the second die cutting station (A2) corresponds to the intermediate belt (300) one by one, and is used for cutting the intermediate belt (300) into a second to-be-slitting belt (500) both of which have a polar lug (800) at the width direction; Downstream of the first die cutting station (A1), a first slitting station (B1) is arranged, and downstream of the second die cutting station (A2), a second slitting station (B2) is arranged; the first slitting station (B1) and the second slitting station (B2) are both provided with a slitting mechanism (30); the slitting mechanism (30) corresponds to the polar plate belt one by one; the slitting mechanism (30) of the first slitting station (B1) is used for cutting the first to-be-slitting belt (400) to form two first polar plate belts (600); and the slitting mechanism (30) of the second slitting station (B2) is used for cutting the second to-be-slitting belt (500) to form two second polar plate belts (700). Each die cutting mechanism (20) comprises two lasers, and the two lasers are respectively used for cutting the polar lugs (800) at both ends of the to-be-slitting belt.

2. The pole piece processing apparatus of claim 1, wherein The first die cutting station (A1) and the first slitting station (B1) are respectively provided with one die cutting mechanism (20) and one slitting mechanism (30); the second die cutting station (A2) and the second slitting station (B2) are respectively provided with two die cutting mechanisms (20) and two slitting mechanisms (30); or 3. The pole piece processing apparatus of claim 1, wherein The first die cutting station (A1) and the second die cutting station (A2) are both provided with one die cutting mechanism (20), and the first slitting station (B1) and the second slitting station (B2) are both provided with one slitting mechanism (30). Each slitting mechanism (30) comprises a first cutter (31) and a second cutter (32), the first cutter (31) and the second cutter (32) are respectively arranged at both ends in the thickness direction of the to-be-slitting belt, and cut the to-be-slitting belt in cooperation.

4. The pole piece processing apparatus of claim 1, wherein The polar plate processing device further comprises a first deviation rectifying mechanism (40) arranged between the unwinding mechanism (10) and the first die cutting station (A1) to rectify the deviation of the material belt (200).

5. The pole piece processing apparatus of claim 1, wherein ​ 6. The pole piece processing apparatus of claim 1, wherein The pole piece processing device further comprises a second deviation rectifying mechanism (50), the first die cutting station (A1) and the first slitting station (B1) and / or the second die cutting station (A2) and the second slitting station (B2) are provided with the second deviation rectifying mechanism (50), and the second deviation rectifying mechanism (50) is used for rectifying the to-be-slitted belt.

7. The pole piece processing apparatus of claim 1, wherein The pole piece processing device further comprises a belt separating mechanism (70), and the belt separating mechanism (70) is arranged downstream of the first slitting station (B1) and / or the second slitting station (B2), and the belt separating mechanism (70) is used for separating the two pole piece belts formed by the to-be-slitted belt.

8. The pole piece processing apparatus of claim 1, wherein The pole piece processing device further comprises a tensioning mechanism (60), and the tensioning mechanism (60) is arranged between the unwinding mechanism (10) and the die cutting station and / or between the die cutting station and the slitting station, and the tensioning mechanism (60) is used for tensioning the material belt (200) and / or the to-be-slitted belt.

9. The pole piece processing apparatus of any of claims 1-8, wherein, The pole piece processing device further comprises a winding mechanism (80), and the winding mechanism (80) is used for winding the pole piece belt.

10. The pole piece processing apparatus of claim 9, wherein The pole piece processing device comprises two winding mechanisms (80), the pole piece belt with the first end having the tab (800) is wound on one winding mechanism (80), and the pole piece belt with the second end having the tab (800) is wound on the other winding mechanism (80); and the first end and the second end are opposite in the width direction.

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