Pole piece processing device

Abstract

The utility model relates to a pole piece processing device, which comprises an unwinding mechanism, a feeding mechanism and a discharging mechanism, a first die cutting station and a second die cutting station are sequentially arranged on the downstream portion of the unwinding mechanism, and the first die cutting station and the second die cutting station are each provided with a die cutting mechanism. A die cutting mechanism of the first die cutting station is used for cutting a material strip to form a middle strip and a first to-be-slit strip with tabs at the two ends in the width direction; the die cutting mechanisms of the second die cutting station are in one-to-one correspondence with the middle belts and are used for cutting the middle belts into second to-be-cut belts with tabs at the two ends in the width direction; a first slitting station is arranged on the downstream portion of the first die cutting station, a second slitting station is arranged on the downstream portion of the second die cutting station, and the first slitting station and the second slitting station are each provided with a slitting mechanism. The slitting mechanisms correspond to the to-be-slit belts one to one, the slitting mechanism of the first slitting station is used for cutting the first to-be-slit belt to form two first pole piece belts, and the slitting mechanism of the second slitting station is used for cutting the second to-be-slit belt to form two second pole piece belts. According to the pole piece processing device, the material belt can be cut into multiple (more than four) pole piece belts at the two die cutting stations and the two slitting stations, the number of the stations is small, the occupied area of the whole device can be greatly reduced, and miniaturization of the device is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery manufacturing equipment, in particular to a pole piece processing device. Background Art

[0002] Lithium-ion batteries have the characteristics of high working voltage, large specific energy, small volume, light weight, long cycle life, low self-discharge rate, no memory effect, and no pollution, and are favored by many power equipment manufacturers.

[0003] In the preparation process of lithium-ion batteries, the preparation of pole pieces is an important link. When preparing pole pieces, a pre-slitter is often used to slit a positive / negative electrode tape of one-out-four or one-out-six into a one-out-two tape. Then, a die-cutting mechanism is used to die-cut the tape into a tape with pole ears of a target size, and then a slitting mechanism is used to slit the tape into a tape of a target width. After the tape is slit into a tape of a target width, the tape is introduced into different winding paths for winding.

[0004] The above-mentioned method for preparing pole pieces involves many devices, resulting in a complex structure; the process flow is long, making the production efficiency low. At the same time, the tape goes through multiple loading and unloading and operations, which will also reduce the first-pass yield of the finished battery, thereby increasing the production cost of the battery. Summary of the Utility Model

[0005] Based on this, it is necessary to provide a pole piece processing device that can improve the above problems in view of the above problems.

[0006] A pole piece processing device includes:

[0007] A unwinding mechanism for unwinding and outputting a tape;

[0008] Downstream of the unwinding mechanism, a first die-cutting station and a second die-cutting station are successively arranged, and die-cutting mechanisms are arranged at both the first die-cutting station and the second die-cutting station; the die-cutting mechanism at the first die-cutting station is used to cut the tape to form a first tape to be slit with pole ears at both ends in the width direction and an intermediate tape; the die-cutting mechanism at the second die-cutting station corresponds to the intermediate tape one by one and is used to cut the intermediate tape into a second tape to be slit with pole ears at both ends in the width direction;

[0009] A first slitting station is arranged downstream of the first die-cutting station, and a second slitting station is arranged downstream of the second die-cutting station. Slitting mechanisms are arranged at both the first slitting station and the second slitting station; the slitting mechanisms correspond to the tapes to be slit one by one. The slitting mechanism at the first slitting station is used to cut the first tape to be slit into two first pole piece tapes, and the slitting mechanism at the second slitting station is used to cut the second tape to be slit into two second pole piece tapes.

[0010] In the above-mentioned pole piece processing device, after the strip passes through the first die-cutting station and the second die-cutting station, a first strip to be slit and a second strip to be slit are respectively formed. The first strip to be slit is cut into a first pole piece strip at the first slitting station, and the second strip to be slit is cut into a second pole piece strip at the second slitting station, so that the strip is finally formed into multiple (at least 4) pole piece strips. That is, the pole piece processing device itself can cut the strip into multiple pole piece strips. Compared with the prior art pole piece preparation method (first cutting the strip into a two-out-one strip, then die-cutting to form a strip to be slit, and finally slitting to form a pole piece strip), there is no need to previously divide the strip into a two-out-one strip. 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 times of strip feeding and running can be reduced, the first-pass yield of the finished battery is improved, and thus the production cost of the battery is reduced. Moreover, the pole piece processing device can cut the strip into multiple (more than 4) pole piece strips at two die-cutting stations and two slitting stations. The number of stations is small, which can greatly reduce the floor area of the entire device and is conducive to the miniaturization of the device.

[0011] In one embodiment, each of the die-cutting mechanisms includes two lasers, and the two lasers are respectively used to cut the tabs formed at both ends of the strip to be slit.

[0012] In one embodiment, one die-cutting mechanism and one slitting mechanism are respectively provided at the first die-cutting station and the first slitting station; two die-cutting mechanisms and two slitting mechanisms are respectively provided at the second die-cutting station and the second slitting station; or

[0013] One die-cutting mechanism is provided at both the first die-cutting station and the second die-cutting station, and one slitting mechanism is provided at both the first slitting station and the second slitting station.

[0014] In one embodiment, each of the slitting mechanisms includes a first cutting knife and a second cutting knife. The first cutting knife and the second cutting knife are respectively arranged at both ends in the thickness direction of the strip to be slit and cooperate with each other to cut the strip to be slit.

[0015] In one embodiment, the pole piece processing device further includes a first deviation rectifying mechanism, and the first deviation rectifying mechanism is arranged between the unwinding mechanism and the first die-cutting station to rectify the strip.

[0016] In one embodiment, the pole piece processing device further includes a second deviation rectifying mechanism. The second deviation rectifying mechanism 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 the second deviation rectifying mechanism is used to rectify the strip to be slit.

[0017] In one embodiment, the pole piece processing device further includes a tape separating mechanism, and the tape separating mechanism is disposed downstream of the first slitting station and / or the second slitting station. The tape separating mechanism is configured to separate the two pole piece tapes formed by the tape to be slit.

[0018] In one embodiment, the pole piece processing device further includes a tensioning mechanism, and the tensioning mechanism is disposed between the unwinding mechanism and the die-cutting station and / or between the die-cutting station and the slitting station. The tensioning mechanism is configured to tension the material tape and / or the tape to be slit.

[0019] In one embodiment, the pole piece processing device further includes a winding mechanism, and the winding mechanism is configured to wind the pole piece tape.

[0020] In one embodiment, the pole piece processing device includes two winding mechanisms. The pole piece tape having a tab at the first end is joined and wound onto one winding mechanism, and the pole piece tape having a tab at the second end is joined and wound onto the other winding mechanism; the first end and the second end are opposite to each other in the width direction. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of a pole piece processing device provided by an embodiment of the present application;

[0022] Figure 2 For using Figure 1 The flow chart of cutting a material tape into pole piece tapes by the pole piece processing device shown in;

[0023] Figure 3 For using Figure 1 The flow chart of cutting another material tape into pole piece tapes by the pole piece processing device shown in.

[0024] Description of the Reference Numerals:

[0025] 100, pole piece processing device; 10, unwinding mechanism; 20, die-cutting mechanism; 30, slitting mechanism; 31, first cutting knife; 32, second cutting knife; 40, first deviation rectifying mechanism; 50, second deviation rectifying mechanism; 60, tensioning mechanism; 70, tape separating mechanism; 80, winding mechanism; 90, tape joining mechanism; A1, first die-cutting station; A2, second die-cutting station; B1, first slitting station; B2, second slitting station; 200, material tape; 201, coating area; 202, blank area; 300, intermediate tape; 400, first tape to be slit; 500, second tape to be slit; 600, first pole piece tape; 700, second pole piece tape; 800, tab. Detailed Embodiments

[0026] To make the above objects, features, and advantages of the present utility model more apparent and understandable, the following provides a detailed description of the specific embodiments of the present utility model in conjunction with the accompanying drawings. A lot of specific details are set forth in the following description to facilitate a full understanding of the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0027] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by 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", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0029] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely 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 being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0032] Referring to Figure 1 , an embodiment of the present application provides a pole piece processing device 100, including an unwinding mechanism 10. The unwinding mechanism 10 is used to unwind and output a strip 200, so as to facilitate the unfolding of the strip 200 at subsequent workstations. Specifically, the unwinding mechanism 10 has a tension control function to ensure that the tension of the strip 200 meets the requirements. The strip 200 is a base material strip on which no tabs 800 are formed by cutting. The strip 200 has at least two coating areas 201, and blank areas 202 are provided at both ends of each coating area 201 in the width direction. Among them, the width direction is perpendicular to the conveying direction (length direction) of the strip 200.

[0033] Continuing to refer to Figure 1, downstream of the unwinding mechanism 10, a first die-cutting station A1 and a second die-cutting station A2 are successively provided. That is, both the first die-cutting station A1 and the second die-cutting station A2 are located downstream of the unwinding mechanism 10, and the second die-cutting station A2 is located downstream of the first die-cutting station A1. Thus, the strip 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. Die-cutting mechanisms 20 are provided at both the first die-cutting station A1 and the second die-cutting station A2. That is, among all the die-cutting mechanisms 20, some are provided at the first die-cutting station A1, and the remaining part is provided at the second die-cutting station A2. The die-cutting mechanism 20 at the first die-cutting station A1 cuts the strip 200 to form a first strip to be slit 400 with tabs 800 at both ends in the width direction and an intermediate strip 300. The number of die-cutting mechanisms 20 at the second die-cutting station A2 is equal to and corresponds one-to-one with the number of intermediate strips 300. The die-cutting mechanisms 20 at the second die-cutting station A2 are used to cut the corresponding intermediate strip 300 to form a second strip to be slit 500 with tabs 800 at both ends in the width direction.

[0034] Here, it should be noted that the cutting trajectory of the die-cutting mechanism 20 is a continuous cutting trajectory. Thus, when the strip 200 is at the first die-cutting station A1, the die-cutting mechanism 20 at the first die-cutting station A1 can cut the strip 200 to form the first strip to be slit 400 and the intermediate strip 300. Among them, the first strip to be slit 400 and the second strip to be slit 500 are pole piece strips to be slit for forming tabs 800, and the intermediate strip 300 is the precursor of the strip to be slit, on which no tabs 800 are formed. Here, it should also be noted that the die-cutting mechanism 20 cuts in the blank area 202 to cut off a part of the blank area 202, and the part finally remaining on the strip to be slit forms the tab 800.

[0035] With the above arrangement, after the strip 200 unwound and output by the unwinding mechanism 10 reaches the first die-cutting station A1, the die-cutting mechanism 20 at the first die-cutting station A1 cuts the strip 200 into the first strip to be slit 400 and the intermediate strip 300. At this time, the first strip to be slit 400 is a pole piece strip to be slit, and it is to be slit in the next process to form a pole piece strip (described below). The intermediate strip 300 on which no tabs 800 are formed is conveyed to the second die-cutting station A2, and the die-cutting mechanism 20 at the second die-cutting station A2 cuts the intermediate strip 300 into the second strip to be slit 500. At this time, the second strip to be slit 500 is also a pole piece strip to be slit, and it is to be slit in the next process to form a pole piece strip.

[0036] Further, continue to refer to Figure 1, a first slitting station B1 is provided downstream of the first die-cutting station A1, and a second slitting station B2 is provided downstream of the second die-cutting station A2. The pole piece processing device 100 includes a plurality of slitting mechanisms 30. Both the first slitting station B1 and the second slitting station B2 are provided with slitting mechanisms 30, that is, among all the slitting mechanisms 30, some are arranged at the first slitting station B1, and the remaining are arranged at the second slitting station B2. The number of slitting mechanisms 30 is equal to and corresponds one by one to the number of tapes to be slit. Specifically, the number of slitting mechanisms 30 at the first slitting station B1 is equal to and corresponds one by one to the number of the first tapes to be slit 400, and the number of slitting mechanisms 30 at the second slitting station B2 is equal to and corresponds one by one to the number of the second tapes to be slit 500. The slitting mechanism 30 at the first slitting station B1 is used to cut the first tape to be slit 400 to form two first pole piece tapes 600, and the slitting mechanism 30 at the second slitting station B2 is used to cut the second tape to be slit 500 to form two second pole piece tapes 700.

[0037] It should be noted here that the slitting mechanism 30 cuts in the coating area 201 so that both ends of the tape to be slit are separated in the width direction, forming a pole piece tape with a tab 800 at one end in the width direction.

[0038] In the pole piece 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 tape to be slit 400 and the second tape to be slit 500 are respectively formed. The first tape to be slit 400 is cut into the first pole piece tape 600 at the first slitting station B1, and the second tape to be slit 500 is cut into the second pole piece tape 700 at the second slitting station B2, so that the material tape 200 finally forms multiple (at least 4) pole piece tapes. That is, the pole piece processing device 100 itself can cut the material tape 200 into multiple pole piece tapes. Compared with the existing pole piece preparation method (first cutting the material tape 200 into a two-out-one tape, then die-cutting to form a tape to be slit, and finally slitting to form a pole piece tape), there is no need to previously divide the material tape 200 into a two-out-one tape, that is, the pre-slitting process is omitted, the equipment structure is simple, the production process flow is short, and the production efficiency is improved. At the same time, the number of times of loading and running the material tape 200 can be reduced, the first-pass rate of the finished battery is improved, and thus the production cost of the battery is reduced. Moreover, the pole piece processing device 100 can cut the material tape 200 into multiple (more than 4) pole piece tapes at two die-cutting stations and two slitting stations. The number of stations is small, which can greatly reduce the floor area of the entire device and is beneficial to the miniaturization of the equipment.

[0039] In some embodiments, continue to refer to Figure 1 , both the first die-cutting station A1 and the second die-cutting station A2 are provided with a die-cutting mechanism 20, and both the first slitting station B1 and the second slitting station B2 are provided with a slitting mechanism 30. Refer to Figure 2, the strip 200 with two coating areas 201 is cut by the die-cutting mechanism 20 into a first strip to be slit 400 and an intermediate strip 300 when passing through the first die-cutting station A1 ( Figure 2 The dotted line in the figure represents the locus line of the tab 800, but at this time, the tab 800 is not formed on the intermediate strip 300). When the intermediate strip 300 passes through the second die-cutting station A2, it is cut by the die-cutting mechanism 20 into a second strip to be slit 500. When the first strip to be slit 400 passes through the first slitting station B1, it is cut by the slitting mechanism 30 into two first electrode strip 600. When the second strip to be slit 500 passes through the second slitting station B2, it is cut by the slitting mechanism 30 into two second electrode strip 700. In this way, the electrode sheet processing device 100 can cut a strip 200 into four electrode strips, that is, the strip 200 forms four electrode strips through the electrode sheet processing device 100 with one input and four outputs.

[0040] In other embodiments, continue to refer to Figure 1 , the first die-cutting station A1 is provided with one die-cutting mechanism 20, the second die-cutting station A2 is provided with two die-cutting mechanisms 20, and the two die-cutting mechanisms 20 are arranged in sequence in the direction perpendicular to the paper surface. The first slitting station B1 is provided with one slitting mechanism 30, the second slitting station B2 is provided with two slitting mechanisms 30, and the two slitting mechanisms 30 are arranged in sequence in the direction perpendicular to the paper surface. Refer to Figure 3 , when the strip 200 with three coating areas 201 passes through the first die-cutting station A1, it is cut by the die-cutting mechanism 20 of the first die-cutting station A1 into a first strip to be slit 400 and two intermediate strips 300. When the two intermediate strips 300 pass through the second die-cutting station A2, they are respectively cut by the two die-cutting mechanisms 20 of the second die-cutting station A2 into a second strip to be slit 500, and at this time there are two second strips to be slit 500. As Figure 1 shown, the two second strips to be slit 500 are arranged in sequence in the direction perpendicular to the paper surface. When the first strip to be slit 400 passes through the first slitting station B1, it is cut by the slitting mechanism 30 into two first electrode strip 600. When the second strip to be slit 500 passes through the second slitting station B2, it is cut by the slitting mechanism 30 into two second electrode strip 700, and at this time there are four second electrode strip 700. In this way, the electrode sheet processing device 100 can cut a strip 200 into six electrode strips, that is, the strip 200 forms six electrode strips through the electrode sheet processing device 100 with one input and six outputs.

[0041] It should be understood that in other embodiments, according to the different number of coating areas 201 of the strip 200, the number of die-cutting mechanisms 20 at the two die-cutting stations and the number of slitting mechanisms 30 at the two slitting stations are adaptively adjusted, and it is also possible to cut a strip 200 into more than six electrode strips, that is, the strip 200 forms more electrode strips through the electrode sheet processing device 100 with one input and multiple outputs (even numbers greater than six, such as eight, ten, etc.).

[0042] Each die-cutting mechanism 20 includes two lasers, which are respectively used to cut the tabs 800 at both ends of the strip to be slit. It can be conceived that in some other embodiments, the die-cutting mechanism 20 can also adopt other structural settings to realize the cutting of the strip 200, such as setting the die-cutting mechanism 20 to include a die-cutting knife, etc.

[0043] Continue to refer to Figure 1 , each slitting mechanism 30 includes a first cutting knife 31 and a second cutting knife 32. The first cutting knife 31 and the second cutting knife 32 are respectively arranged at both ends in the thickness direction of the strip to be slit, and cooperate with each other to cut the strip to be slit.

[0044] In some embodiments, the electrode sheet processing device 100 includes a first deviation rectifying mechanism 40, which is arranged between the unwinding mechanism 10 and the first die-cutting station A1 to rectify the strip 200, so as to prevent the strip 200 from running off during transportation and accurately find the cutting position at the first die-cutting station A1, thereby ensuring that the size of the tabs 800 formed after cutting meets the requirements.

[0045] Continue to refer to Figure 1 , the electrode sheet processing device 100 further includes a second deviation rectifying mechanism 50. The second deviation rectifying mechanism 50 is arranged between the first die-cutting station A1 and the first slitting station B1, and the second deviation rectifying mechanism 50 is also arranged between the second die-cutting station A2 and the second slitting station B2. The second deviation rectifying mechanism 50 is used to rectify the strip to be slit, so as to prevent the strip to be slit from running off during transportation and accurately find the cutting position at the slitting station, thereby ensuring that the size of the cut electrode sheet strip meets the requirements.

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

[0047] The electrode sheet processing device 100 further includes a strip separating mechanism 70. The strip separating mechanism 70 is arranged downstream of the first slitting station B1 and / or the second slitting station B2. The strip separating mechanism 70 is used to separate the two electrode sheet strips formed by cutting the strip to be slit, so as to introduce the electrode sheet strips into different paths and facilitate the winding in subsequent processes.

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

[0049] Further, continue to refer to Figure 1, the pole piece processing device 100 includes two winding mechanisms 80. The pole piece tapes with pole ears 800 at the first ends are combined and wound onto one winding mechanism 80, and the pole piece tapes with pole ears 800 at the second ends are combined and wound onto the other winding mechanism 80. In some specific embodiments, when the strip 200 is in a one-out-four mode, Figure 2 the first pole piece tape and the third pole piece tape from the left in the figure are wound onto the same winding mechanism 80, and the second pole piece tape and the fourth pole piece tape are wound onto the same winding mechanism 80. In some other specific embodiments, when the strip roll 200 is in a one-out-six mode, Figure 3 the first pole piece tape, the third pole piece tape, and the fifth pole piece tape from the left in the figure are wound onto the same winding mechanism 80, and the second pole piece tape, the fourth pole piece tape, and the sixth pole piece tape are wound onto the same winding mechanism 80. In this way, the pole piece tapes are finally wound onto the two winding mechanisms 80, reducing the number of tape runs and being able to reduce the complexity of the equipment.

[0050] Furthermore, the pole piece processing device 100 further includes a tape combining mechanism 90. The tape combining mechanism 90 is used to combine the pole piece tapes so that they are wound onto the winding mechanism 80. Specifically, there are two tape combining mechanisms 90, and the two tape combining mechanisms 90 are arranged in one-to-one correspondence with the two winding mechanisms 80. The pole piece tapes combined by the tape combining mechanism 90 are wound onto the winding mechanism 80.

[0051] The comparison between preparing the pole piece tape by the one-out-four mode of the pole piece processing device 100 provided in the embodiment of the present application and the existing tape making is as follows:

[0052]

[0053] It can be seen from the above table that the production capacity of preparing the pole piece tape by the one-out-four mode of the pole piece processing device 100 provided in the embodiment of the present application is increased by 83.3% compared with the conventional tape making, and the production efficiency is greatly improved.

[0054] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0055] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it cannot be understood as a limitation to the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A pole piece processing device, characterized in that: include: An unwinding mechanism (10) for unwinding an output material strip (200); A first die-cutting station (A1) and a second die-cutting station (A2) are sequentially arranged downstream of the unwinding mechanism (10), 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 to cut the material strip (200) to form a first strip (400) to be slit, both ends of which have tabs (800) in the width direction, and an intermediate strip (300); the die-cutting mechanism (20) of the second die-cutting station (A2) corresponds to the intermediate strip (300) in a one-to-one manner, and is used to cut the intermediate strip (300) into a second strip (500) to be slit, both ends of which have tabs (800) in the width direction; A first slitting station (B1) is provided downstream of the first die-cutting station (A1), and a second slitting station (B2) is provided downstream of the second die-cutting station (A2). Both the first slitting station (B1) and the second slitting station (B2) are provided with slitting mechanisms (30); the slitting mechanisms (30) correspond one-to-one to the strips to be slit, the slitting mechanism (30) of the first slitting station (B1) is used to cut the first strip to be slit (400) to form two first electrode strips (600), and the slitting mechanism (30) of the second slitting station (B2) is used to cut the second strip to be slit (500) to form two second electrode strips (700).

2. The pole piece processing device according to claim 1, characterized in that: Each of the die-cutting mechanisms (20) comprises two lasers, and the two lasers are respectively used to cut and form the pole ears (800) at both ends of the strip to be cut.

3. The pole piece processing device according to claim 1, characterized in that: 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 The first die-cutting station (A1) and the second die-cutting station (A2) are each provided with a die-cutting mechanism (20), and the first slitting station (B1) and the second slitting station (B2) are each provided with a slitting mechanism (30).

4. The pole piece processing device according to claim 1, characterized in that: Each of the slitting mechanisms (30) comprises a first cutter (31) and a second cutter (32); the first cutter (31) and the second cutter (32) are respectively arranged 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.

5. The pole piece processing device according to claim 1, characterized in that: The pole piece processing device further comprises a first deviation correcting mechanism (40), which is arranged between the unwinding mechanism (10) and the first die-cutting station (A1) to correct the deviation of the material strip (200).

6. The pole piece processing device according to claim 1, characterized in that: The electrode processing device further comprises a second deflection correcting mechanism (50), which is arranged between the first die-cutting station (A1) and the first slitting station (B1) and / or between the second die-cutting station (A2) and the second slitting station (B2), and is used for correcting the deflection of the strip to be slit.

7. The pole piece processing device according to claim 1, characterized in that: The electrode processing device also includes a tape splitting mechanism (70), which is provided downstream of the first slitting station (B1) and / or the second slitting station (B2), and is used to separate the two electrode tapes formed by the tapes to be slit.

8. The pole piece processing device according to claim 1, characterized in that: The pole piece processing device further comprises a tensioning mechanism (60), wherein 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 strip (200) and / or the strip to be slit.

9. The pole piece processing device according to any one of claims 1 to 8, characterized in that: The pole piece processing device further comprises a winding mechanism (80), and the winding mechanism (80) is used for winding the pole piece tape.

10. The pole piece processing device according to claim 9, characterized in that: The pole piece processing device comprises two winding mechanisms (80), wherein the pole piece with a pole ear (800) at the first end is combined with the strip and wound onto one winding mechanism (80), and the pole piece with a pole ear (800) at the second end is combined with the strip and wound onto another winding mechanism (80); the first end is opposite to the second end in the width direction.

Images