Slitting Equipment

Abstract

The present application discloses a slitting device including an unwinding device, a first slitting device, a first conveying device, a second slitting device, and a plurality of winding devices. The unwinding device is used to deliver a pole piece material belt, the first slitting device is used to receive the pole piece material belt delivered by the unwinding device and cut the foil material area of ​​the pole piece material belt to form a plurality of sub-material belts, the first conveying device is used to receive the plurality of sub-material belts and lay them flat at intervals from each other before delivering them, the second slitting device is used to receive the plurality of sub-material belts laid flat at intervals from each other and cut the coating area of ​​the sub-material belt to form a plurality of pole pieces, the plurality of winding devices are connected to the second slitting device, and the plurality of winding devices are used to wind up the plurality of pole pieces. Using the slitting device of the present application, the number of cutters is small, the cost of the equipment is low, the volume of the equipment is small, and the space occupied is small.

Description

[Technical field]

[0001] (CROSS REFERENCE TO RELATED APPLICATIONS) This application claims priority to a Chinese patent application filed with the China Patent Office on February 13, 2023, bearing application number 202320201029.0 and entitled "Slitting Apparatus", the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the technical field of lithium batteries, and in particular to slitting equipment. [Background technology]

[0003] In the related art, when manufacturing pole pieces for lithium-ion batteries, the pole piece material belt is mainly slit into narrow pole pieces with the required specifications for the battery core by slitting equipment. When slitting, the foil material area and the coating area of ​​the pole piece material belt need to be cut, and since the cutter parameters for cutting different material areas are different, usually two slitting equipment with different cutter parameters are used to cut the foil material area and the coating area of ​​the pole piece material belt respectively, which makes the material loading and unloading process cumbersome and requires a large number of equipment.

[0004] Based on the above defects, some of the existing slitting equipment is equipped with cutters with different parameters for sequentially cutting the foil material area and the coating area of ​​the pole piece material belt. However, the above slitting equipment needs at least three cutters, one of which cuts the foil material area of ​​the pole piece material belt, then divides the pole piece material belt into two parts, and cuts the coating area for the two parts with another two cutters, which results in a large number of cutters, high equipment cost, large equipment volume, and large occupied space. Summary of the Invention [Means for solving the problem]

[0005] The embodiments of the present application disclose a slitting machine that has a reduced number of cutters, reduced machine cost, reduced machine volume, and reduced space occupation.

[0006] An embodiment of the present application discloses a slitting device, the slitting device including an unwinding device, a first slitting device, a first conveying device, a second slitting device, and a plurality of winding devices; The unwinding device is used for unloading the pole piece material belt, The first slitting device is used to receive the pole piece material belt discharged by the unwinding device and cut the foil material area of ​​the pole piece material belt to form a plurality of sub-material belts; the first conveying device is used to receive a plurality of the sub-material belts and convey the plurality of the sub-material belts in a flat manner spaced apart from one another; The second slitting device is used to receive a plurality of the sub-material belts laid flat and spaced apart from one another and cut the coating areas of the sub-material belts to form a plurality of pole pieces, and the plurality of winding devices are used to wind up the plurality of the pole pieces.

[0007] Optionally, the first conveying device includes a plurality of first conveying mechanisms, a second conveying mechanism, and a plurality of first deviation correction mechanisms, the plurality of first conveying mechanisms are located between the first slit device and the second conveying mechanism, and the plurality of first conveying mechanisms are spaced apart along a height direction of the slit device; Each of the first conveying mechanisms is used to receive a portion of the sub-material belts that are not adjacent to each other among the plurality of sub-material belts cut by the first slit device, and to convey the plurality of sub-material belts to the second conveying mechanism; the second conveying mechanism is located between the first conveying mechanism and the second slitting device, and is used to receive the plurality of sub-material belts that are spaced apart from one another and laid flat, and convey them to the second slitting device; The multiple first misalignment correction mechanisms are provided on each of the multiple first conveying mechanisms, and the multiple misalignment correction mechanisms are used to adjust the positions of the multiple sub-material belts on the first conveying mechanism so that the spacing between the multiple sub-material belts along the width direction of the multiple sub-material belts is equal when the multiple sub-material belts are conveyed to the second conveying mechanism.

[0008] Optionally, the slitting equipment further includes a second conveying device, the second conveying device being located between the unwinding device and the first slitting device, and the second conveying mechanism being used to receive the pole piece material belt discharged by the unwinding device and transport the pole piece material belt to the first slitting device.

[0009] Optionally, the second conveying device includes a drive roller and a plurality of transmission rollers, the plurality of transmission rollers being arranged between the unwinding device and the first slitting device, and two adjacent transmission rollers being arranged at a distance from each other, the drive roller being arranged between the two adjacent transmission rollers, and the drive roller being used to drive the pole piece material belt to convey it along the plurality of transmission rollers from the unwinding device to the first slitting device.

[0010] Optionally, the second conveying device further includes a tension balance roller, the tension balance roller being disposed between two adjacent transmission rollers therein, and the tension balance roller is used to adjust the tension of the pole piece material belt.

[0011] Optionally, the slitting equipment further includes a tension interruption mechanism, the tension interruption mechanism being provided on the first conveying device, and the tension interruption mechanism being used to interrupt the tension of the sub-material belt between the first slitting device and the second slitting device.

[0012] Optionally, the slitting equipment further includes a plurality of belt press mechanisms, each of which is provided between the winding device and the second slitting device, and each of which is used to pressurize each of the pole pieces to tension the pole pieces.

[0013] Optionally, the slitting equipment further includes a second misalignment correction mechanism, the second misalignment correction mechanism being provided between the unwinding device and the first slitting device, and the second misalignment mechanism being used to adjust the position where the pole piece material belt enters the first slitting device along the width direction of the pole piece material belt.

[0014] Optionally, the slitting equipment further includes a plurality of third conveying devices, each of which is provided between the winding device and the second slitting device, and the plurality of third conveying devices are used to transport the plurality of pole pieces from the second slitting device to the plurality of winding devices.

[0015] Optionally, the slitting device further includes a plurality of width measuring mechanisms, each of which is provided on each of the third conveying devices, and each of the width measuring mechanisms is used to measure the width of the pole piece conveyed by each of the third conveying devices.

[0016] Optionally, the slitting equipment further includes a plurality of dust removal mechanisms, each of which is provided on each of the third conveying devices, and each of the dust removal mechanisms is used to remove dust from the pole pieces transported by each of the third conveying devices.

[0017] Optionally, each of the dedusting mechanisms includes one or more of a brush dedusting mechanism, an ultrasonic dedusting mechanism, and an air knife dedusting mechanism.

[0018] Optionally, the slit device further includes a plurality of static electricity removal mechanisms, each of which is provided on each of the third conveying devices, and each of the static electricity removal mechanisms is used to remove static electricity from the pole pieces transported by each of the third conveying devices.

[0019] Compared with the prior art, the embodiments of the present application have at least the following beneficial effects: In the embodiment of the present application, the pole piece material belt is conveyed to the first slitting device by the unwinding device, the first slitting device receives the pole piece material belt and cuts the foil material area of ​​the pole piece material belt to form a plurality of sub-material belts, the first conveying device receives the plurality of sub-material belts and lays the plurality of sub-material belts flatly at intervals from each other before conveying them to the second slitting device, so that the second slitting device can simultaneously cut the coating areas of the plurality of sub-material belts to form a plurality of pole pieces, and there is no need to provide a plurality of second slitting devices to cut the coating areas of the plurality of sub-material belts respectively, and the number of cutters is small, the cost of the equipment is low, the volume of the equipment is small, and the space occupied is small. In addition, by laying the plurality of sub-material belts flatly at intervals from each other, it is possible to avoid the plurality of sub-material belts interfering with each other and even entangling. At the same time, a plurality of winding devices are used to wind up the plurality of pole pieces to complete the packaging of the pole pieces.

[0020] In order to more clearly explain the technical solutions in the embodiments of the present application, the following briefly introduces drawings necessary for the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without any creative efforts. [Brief description of the drawings]

[0021] [Figure 1] FIG. 2 is a structural diagram of a slit device disclosed in an embodiment of the present application. [Diagram 2]FIG. 2 is a structural diagram of a pole piece material belt disclosed in an embodiment of the present application. [Diagram 3] FIG. 2 is a structural diagram of a sub-material belt disclosed in an embodiment of the present application. [Figure 4] FIG. 1 is a structural diagram of a slit device according to a related art. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] The technical solutions in the embodiments of the present application are described below clearly and completely with reference to the drawings of the embodiments of the present application, and obviously, the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. Based on the embodiments of the present application, other embodiments that a person skilled in the art can obtain without any creative efforts all belong to the protection scope of the present application.

[0023] In this application, the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "center", "vertical", "horizontal", "lateral", "longitudinal", etc. are based on the orientations or positional relationships shown in the drawings. These terms are primarily used to better explain this application and its embodiments, and are not intended to limit the devices, elements or components shown to necessarily have a specific orientation or to be constructed and operated in a specific orientation.

[0024] In addition, some of the above terms may be used to express other meanings besides expressing an orientation or positional relationship, for example, the term "on" may be used to express an attachment relationship or a connection relationship in some situations. Those skilled in the art can understand the specific meanings of these terms in the present application according to specific situations.

[0025] In addition, the terms "mount," "install," "provide," "couple," and "connect" should be understood in a broad sense, for example, a fixed connection, a removable connection, or an integral structure, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or an internal communication between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific situation.

[0026] Additionally, terms such as "first", "second", etc. are primarily used to distinguish between different devices, elements or components (which may be different even if the specific type or structure is the same) and are not intended to indicate or imply the relative importance or number of the devices, elements or components depicted. Unless otherwise specified, "plurality" means two or more.

[0027] The present application discloses a slitting machine that has a small number of cutters, low equipment cost, small equipment volume, and small space occupation.

[0028] Referring to Figures 1 and 2, it is a structural diagram of a slitting device 100 provided in an embodiment of the present application, which includes an unwinding device 1, a first slitting device 2, a first conveying device 3, a second slitting device 4 and multiple winding devices 5.

[0029] The unwinding device 1 is used to unload the pole piece material belt 200, and the first slitting device 2 is used to receive the pole piece material belt 200 unloaded by the unwinding device 1 and cut the foil material area of ​​the pole piece material belt 200 to form a plurality of sub-material belts 201. The first conveying device 3 is used to receive the plurality of sub-material belts 201 and unload the plurality of sub-material belts 201 by providing them flatly at intervals from each other. The second slitting device 4 is used to receive the plurality of sub-material belts 201 that are provided flatly at intervals from each other and cut the coating area of ​​the sub-material belt 201 to form a plurality of pole pieces 202. The plurality of winding devices 5 are used to wind up the plurality of pole pieces 202.

[0030] Here, as shown in Fig. 2, the first slit device 2 cuts the foil material area of ​​the pole piece material belt 200 means cutting the first foil material area 200b. As shown in Fig. 3, the multiple sub-material belts 201 are provided flatly at intervals from each other means that the multiple sub-material belts 201 are provided at intervals along the width direction of the sub-material belt 201 and are provided on the same plane.

[0031] In this embodiment, the pole piece material belt 200 is conveyed to the first slitting device 2 by the unwinding device 1, the pole piece material belt 200 is received by the first slitting device 2 and the foil material area of ​​the pole piece material belt 200 is cut to form a plurality of sub-material belts 201, the plurality of sub-material belts 201 are received by the first conveying device 3 and the plurality of sub-material belts 201 are arranged flatly at intervals from each other and then conveyed to the second slitting device 4, so that the second slitting device 4 can simultaneously cut the coating areas 200a of the plurality of sub-material belts 201 to form a plurality of pole pieces 202, and there is no need to provide a plurality of second slitting devices 4 to cut the coating areas 200a of the plurality of sub-material belts 201 respectively, so that the number of cutters is small, the cost of the equipment is low, the volume of the equipment is small, and the space occupied is small. In addition, by arranging the plurality of sub-material belts 201 flatly at intervals from each other, it is possible to avoid the plurality of sub-material belts 201 interfering with each other and even entangling with each other. At the same time, a plurality of winding devices 5 are used to wind up a plurality of pole pieces 202, completing the packaging of the pole pieces 202.

[0032] In the related art, as shown in FIG. 4, some of the existing slitting equipment requires at least three cutters, one of which, cutter 21, cuts the foil material area of ​​the pole piece material belt, then divides the pole piece material belt into two parts, and cuts the coating area of ​​the two parts with the other two cutters 22a and 22b. The two parts are usually transported in both upward and downward directions, but the other two cutters 22a and 22b are installed on the top and bottom, respectively. Therefore, the existing slitting equipment occupies a large space in the vertical direction and requires an upward movement, which results in high work risks, a complex equipment structure, and many dangerous points, resulting in a high failure rate, low operation rate, and low production efficiency.

[0033] In this embodiment, the second slitting device 4 can simultaneously cut the coating areas 200a of multiple sub-material belts 201 to form multiple pole pieces 202, thereby reducing the space occupied along the height direction of the slitting equipment 100, eliminating the need for lifting operations and reducing the work risk. In addition, the structure of the slitting equipment 100 in this embodiment is simple and there are few dangerous points, resulting in a low failure rate, a high operating rate, and high production efficiency.

[0034] In some embodiments, as shown in FIG. 1, the first conveying device 3 includes a plurality of first conveying mechanisms 31, a second conveying mechanism 32, and a first misalignment correction mechanism 6.

[0035] The multiple first conveying mechanisms 31 are located in the first slitting device 2 and the second conveying mechanism 32, and the multiple first conveying mechanisms 31 are arranged at intervals along the height direction of the slitting equipment 100, and each first conveying mechanism 31 is used to receive a portion of non-adjacent sub-material belts 201 among the multiple sub-material belts 201 cut by the first slitting device 2, and to branch and convey the multiple sub-material belts 201 to the second conveying mechanism 32.

[0036] The second conveying mechanism 32 is located between the first conveying mechanism 31 and the second slitting device 4, and is used to receive a plurality of sub-material belts 201 arranged flat and spaced apart from each other, and convey them to the second slitting device 4.

[0037] A plurality of first shift correction mechanisms 6 are provided on each of the plurality of first conveying mechanisms 31, and the plurality of first shift correction mechanisms 6 are used to adjust the positions of the plurality of sub-material belts 201 on the first conveying mechanism 31 so that the spacing between the plurality of sub-material belts 201 along the width direction of the sub-material belts 201 is equal when the plurality of sub-material belts 201 are conveyed to the second conveying mechanism 32.

[0038] On the other hand, by arranging multiple first conveying mechanisms 31 at intervals along the height direction of the slitting equipment 100, the multiple first conveying mechanisms 31 can receive some of the multiple sub-material belts 201 that are not adjacent to each other among the multiple sub-material belts 201 cut by the first slitting device 2 and branch and convey them to the second conveying mechanism 32.Therefore, when the multiple sub-material belts 201 cut by the first slitting device 2 move away from the first slitting device 2, by branching and conveying the non-adjacent sub-material belts 201, it is possible to prevent the multiple sub-material belts 201 from interfering with each other and even becoming entangled.

[0039] On the other hand, the multiple first deviation correction mechanisms 6 adjust the positions of the multiple sub-material belts 201 on the first conveying mechanism 31 so that the spacing between the multiple sub-material belts 201 along the width direction of the sub-material belts 201 is equal when the multiple sub-material belts 201 are conveyed to the second conveying mechanism 32. Therefore, when the second conveying mechanism 32 conveys the multiple sub-material belts 201 to the second slitting device 4, the positions of the multiple sub-material belts 201 do not change and the spacing distances between the coating areas 200a of the multiple sub-material belts 201 on the same surface are maintained equal, thereby avoiding the occurrence of deviations and inconsistencies in the widths of the pole pieces 202 cut by the second slitting device 4, and resulting in a high yield of the pole pieces 202.

[0040] Here, both the first transport mechanism 31 and the second transport mechanism 32 may include a plurality of transmission rollers.

[0041] As shown in Fig. 2, the pole piece material belt 200 has four coating regions 200a, and between two adjacent coating regions 200a, there is a first foil material region 200b, and there is a second foil material region 200c on the side away from the first foil material region 200b of the first coating region 200a going from top to bottom along the paper, and there is another second foil material region 200c on the side away from the first foil material region 200b of the fourth coating region 200a going from top to bottom along the paper. When the pole piece material belt 200 reaches the first slip device 2, the first slip device 2 cuts the first foil material region 200b of the pole piece material belt 200 along the dotted lines shown in Fig. 2, forming four sub-material belts 201 shown in Fig. 3. When the four sub-material belts 201 are laid flat and spaced apart from each other and reach the second slitting device 4, the second slitting device 4 cuts the coating area 200a of the sub-material belts 201 along the dotted lines shown in Figure 3 to form pole pieces 202.

[0042] Taking the pole piece material belt 200 in FIG. 2 as an example, the above "each first conveying mechanism 31 is used to receive a part of the non-adjacent sub-material belts of the multiple sub-material belts 201 cut by the first slit device 2" means that the first conveying mechanism 31 receives the first sub-material belt 201 and the third sub-material belt 201 (both of which are not adjacent) going from top to bottom along the paper surface of FIG. 2. The second conveying mechanism 32 receives the second sub-material belt 201 and the fourth sub-material belt 201 (both of which are not adjacent) going from top to bottom along the paper surface direction of FIG. 2. The first sub-material belt 201 and the third sub-material belt 201 are not adjacent and are originally spaced apart from each other, so that they do not interfere with each other or even entangle with each other when entering one conveying mechanism, and the second sub-material belt 201 and the fourth sub-material belt 201 are also not adjacent and are originally spaced apart from each other, so that they do not interfere with each other or even entangle with each other when entering another conveying mechanism.

[0043] In some embodiments, the number of coating regions 200a of the pole piece material belt 200 may be different from the number of the pole piece material belt 200 shown in FIG. 2, for example, the coating regions 200a may be two, three, five, etc., and is not particularly limited in this embodiment.

[0044] In some embodiments, as shown in FIG. 1 , the slitting equipment 100 further includes a second conveying device 7, which is located between the unwinding device 1 and the first slitting device 2, and the second conveying device 7 is used to receive the pole piece material belt 200 discharged by the unwinding device 1 and transport the pole piece material belt 200 to the first slitting device 2.

[0045] Optionally, the second conveying device 7 includes a driving roller 71 and a plurality of transmission rollers 72, the plurality of transmission rollers 72 are provided between the unwinding device 1 and the first slitting device 2, and two adjacent transmission rollers 72 are provided at an interval, and a driving roller 71 is provided between the two adjacent transmission rollers 72, and the driving roller 71 is used to drive the pole piece material belt 200 to be conveyed from the unwinding device 1 to the first slitting device 2 along the plurality of transmission rollers 72. In this way, the driving roller 71 can provide power to drive the pole piece material belt 200 to move along the plurality of transmission rollers 72, thereby conveying the pole piece material belt 200 from the unwinding device 1 to the first slitting device 2 along the distribution direction of the plurality of transmission rollers 72, the conveying process is stable, the pole piece material belt 200 does not shift, and it is favorable to improving the cutting accuracy.

[0046] Exemplarily, the second conveying device 7 further includes a tension balance roller 73, which is disposed between two adjacent transmission rollers 72 therein, and the tension balance roller 73 is used to adjust the tension of the pole piece material belt 200. In this way, the tension swing roller 73 is used to adjust the tension of the pole piece material belt 200 according to the tension requirement for the pole piece material belt 200 when the first slitting device 2 cuts the foil material area of ​​the pole piece material belt 200, so that the tension of the pole piece material belt 200 can be adapted to the cutting requirement of the first slitting device 2, and the cutting accuracy is higher and the cutting effect is better.

[0047] Optionally, the slitting device 100 further includes a tension interrupting mechanism 8, which is provided in the first conveying device 3, and is used to interrupt the tension of the sub-material belt 201 between the first slitting device 2 and the second slitting device 4. In this way, the tension interrupting mechanism 8 interrupts the tension of the sub-material belt 201, so that the tension requirements of the first slitting device 2 for the pole piece material belt 200 and the tension requirements of the second slitting device 4 for the pole piece material belt 200 can be respectively met, without affecting each other, and the cutting accuracy and effect are improved.

[0048] In some embodiments, the slitting device 100 further includes a plurality of belt press mechanisms 9, and a belt press mechanism 9 is provided between each winding device 5 and the second slitting device 4, and each belt press mechanism 9 is used to pressurize each pole piece 202 to make the pole piece 202 tense. In this way, when there is no tension in the pole piece 202, the belt press mechanism 9 presses the pole piece 202 to make the pole piece 202 tense, which makes it easier for the winding device 5 to wind the pole piece 202.

[0049] Exemplarily, the slitting device 100 further includes a second misalignment correction mechanism 10, which is provided between the unwinding device 1 and the first slitting device 2, and is used for adjusting the position of the second slitting device 200 along the width direction of the pole piece material belt 200. In this way, the second misalignment correction mechanism 10 adjusts the position of the pole piece material belt 200 in the width direction of the pole piece material belt 200, so that when the pole piece material belt 200 enters the first slitting device 2, the first slitting device 2 can cut the foil material area of ​​the pole piece material belt 200, resulting in high cutting accuracy and high yield.

[0050] In some embodiments, the slitting apparatus 100 further includes a plurality of third conveying devices 11, each connected to the plurality of winding devices 5 and the second slot device 4, and the plurality of third conveying devices 11 respectively transport the plurality of pole pieces 202 from the second slitting device 4 to the plurality of winding devices 5.

[0051] Exemplarily, the slitting device 100 further includes a plurality of width measuring mechanisms 12, each of which is provided for each of the plurality of third conveying devices 11, and each width measuring mechanism 12 is used to measure the width of the pole piece 202 conveyed by each of the third conveying devices 11. In this way, the width measuring mechanism 12 measures the width of the pole piece 202, so that it can be determined whether the width of the pole piece 202 meets the processing requirements, and thus, after the winding device 5 winds up the pole piece 202, the wound pole piece material belt 200 can be sorted, and the pole piece 202 that meets the processing requirements can be shipped from the factory and conveyed to the next station for processing, but the pole piece 202 that does not meet the processing requirements can be reprocessed or reused as waste material, etc.

[0052] In some embodiments, the slitting apparatus 100 further includes a plurality of dust removal mechanisms 13, each of which is provided for each of the plurality of third conveying devices 11, and each width measuring mechanism 12 is used to remove dust from the pole pieces 202 conveyed by each of the third conveying devices 11. In this manner, by removing dust from the pole pieces 202, the cleanliness of the pole pieces 202 is guaranteed, and a contaminated pole piece 202 is prevented from being shipped from the factory after being wound by the winding device 5, causing quality problems.

[0053] Optionally, each dust removing mechanism 13 includes one or more of a brush dust removing mechanism 13, an ultrasonic dust removing mechanism 13, and an air knife dust removing mechanism 13. In this way, various different dust removing mechanisms 13 are provided in this embodiment, which can be selected according to actual situations to meet different usage needs.

[0054] In some embodiments, the slitting equipment 100 further includes a plurality of static electricity removal mechanisms (not shown), each of which is provided for each of the third conveying devices 11, and each static electricity removal mechanism is used to remove static electricity from the pole pieces 202 conveyed by each of the third conveying devices 11. In this manner, the static electricity removal mechanism removes static electricity from the pole pieces 202, thereby preventing the pole pieces 202 from attracting dust and fine particles due to static electricity, thereby preventing the pole pieces 202 from being contaminated, and improving the yield of the pole pieces.

[0055] Optionally, the slitting device 100 further includes a color mark sensor 14 and a marking module (not shown), the color mark sensor 14 is provided on the second conveying device 7, and the color mark sensor 14 is used to detect the tape, non-coated area of ​​the pole piece material belt 200. The marking module is provided on the third conveying device 11, and the marking module is used to mark the pole piece 202, for example, the marking module may be a laser marking machine or a labeling machine, etc., but is not specifically limited in this embodiment.

[0056] In the slitting device 100 according to the embodiment of the present application, the unwinding device 1 delivers the pole piece material belt 200 to the first slitting device 2, the first slitting device 2 receives the pole piece material belt 200 and cuts the foil material area of ​​the pole piece material belt 200 to form a plurality of sub-material belts 201, the first conveying device 3 receives the plurality of sub-material belts 201, and the plurality of sub-material belts 201 are arranged flatly at intervals from each other before being delivered to the second slitting device 4. The second slitting device 4 can simultaneously cut the coating areas 200a of the plurality of sub-material belts 201 to form a plurality of pole pieces 202, and there is no need to provide a plurality of second slitting devices 4 to cut the coating areas 200a of the plurality of sub-material belts 201, respectively, and the number of cutters is small, the cost of the device is low, the volume of the device is small, and the space occupied is small. In addition, by arranging the plurality of sub-material belts 201 flatly at intervals from each other, it is possible to avoid the plurality of sub-material belts 201 interfering with each other and even entangling with each other. At the same time, the multiple winding devices 5 are used to wind up the multiple pole pieces 202, respectively, to complete the packaging of the pole pieces 202.

[0057] The above describes in detail the slitting equipment disclosed in the examples of the present application. Specific examples are applied in this specification to explain the principles and embodiments of the present application. The explanation of the above examples is only intended to facilitate understanding of the slitting equipment of the present application and its core concept. At the same time, a person skilled in the art may make changes in specific embodiments and application scope based on the concept of the present application. As stated above, the contents of this specification should not be construed as limiting the present application. [Explanation of symbols]

[0058] 100, slitting equipment; 1, unwinding device; 2, first slitting device; 3, first conveying device; 31, first conveying mechanism; 32, second conveying mechanism; 4, second slitting device; 5, winding device; 6, first deviation correction mechanism; 7, second conveying device; 71, driving roller; 72, transmission roller; 73, tension balance roller; 8, tension interrupting mechanism; 9, belt press mechanism; 10, second deviation correction mechanism; 11, third conveying device; 12, width measuring mechanism; 13, dust removal mechanism; 131, brush dust removal mechanism; 132, ultrasonic dust removal mechanism; 14, color mark sensor; 200, pole piece material belt; 200a, coating area; 200b, first foil material area; 200c, second foil material area; 201, sub-material belt; 202, pole piece.

Claims

1. A slitting device, comprising: An unwinding device, the unwinding device being used for unloading a pole piece material belt; A first slitting device is used to receive the pole piece material belt discharged by the unwinding device and cut a foil material area of ​​the pole piece material belt to form a plurality of sub-material belts; A first conveying device, the first conveying device being used to receive a plurality of the sub-material belts and to convey the plurality of the sub-material belts in a flat manner spaced apart from each other; a second slitting device that is used to receive a plurality of the sub-material belts that are spaced apart from one another and laid flat, and to cut the coating areas of the sub-material belts to form a plurality of pole pieces; a plurality of winding devices, the plurality of winding devices including a plurality of winding devices used to wind a plurality of the pole pieces.

2. the first conveying device includes a plurality of first conveying mechanisms, a second conveying mechanism, and a plurality of first deviation correction mechanisms, the plurality of first conveying mechanisms being located between the first slit device and the second conveying mechanism, and the plurality of first conveying mechanisms being provided at intervals along a height direction of the slit device; Each of the first conveying mechanisms is used to receive a portion of the sub-material belts that are not adjacent to each other among the plurality of sub-material belts cut by the first slit device, and to convey the plurality of sub-material belts to the second conveying mechanism; the second conveying mechanism is located between the first conveying mechanism and the second slitting device, and is used to receive the plurality of sub-material belts spaced apart from one another and flatly disposed thereon, and convey them to the second slitting device; The slitting equipment according to claim 1, characterized in that the multiple first deviation correction mechanisms are provided on each of the multiple first conveying mechanisms, and the multiple first deviation correction mechanisms are used to adjust the positions of the multiple sub-material belts on the first conveying mechanism so that the intervals between the multiple sub-material belts along the width direction of the sub-material belts are equal when the multiple sub-material belts are conveyed to the second conveying mechanism.

3. The slitting equipment further includes a second conveying device, the second conveying device being located between the unwinding device and the first slitting device, and the second conveying device being used to receive the pole piece material belt discharged by the unwinding device and to convey the pole piece material belt to the first slitting device. The slitting equipment according to claim 1 or 2, characterized in that the second conveying device is used to receive the pole piece material belt discharged by the unwinding device and to convey the pole piece material belt to the first slitting device.

4. The slitting device according to claim 3, characterized in that the second conveying device includes a drive roller and a plurality of transmission rollers, the plurality of transmission rollers being provided between the unwinding device and the first slitting device, and two adjacent transmission rollers being provided at an interval, the drive roller being provided between the two adjacent transmission rollers, and the drive roller being used to drive the pole piece material belt to convey it along the plurality of transmission rollers from the unwinding device to the first slitting device.

5. The slitting equipment according to claim 4, characterized in that the second conveying device further includes a tension balance roller, the tension balance roller being provided between two adjacent transmission rollers therein, and the tension balance roller is used to adjust the tension of the pole piece material belt.

6. The slitting device according to any one of claims 1 to 5, further comprising a tension interrupting mechanism, the tension interrupting mechanism being provided in the first conveying device, and the tension interrupting mechanism being used to interrupt the tension of the sub-material belt between the first slitting device and the second slitting device.

7. The slitting equipment according to any one of claims 1 to 6, further comprising a plurality of belt press mechanisms, each of which is provided between the winding device and the second slitting device, and each of which is used to pressurize each of the pole pieces to tension the pole pieces.

8. The slitting equipment further includes a second deviation correction mechanism, the second deviation correction mechanism being provided between the unwinding device and the first slitting device, and the second deviation mechanism being used to adjust the position where the pole piece material belt enters the first slitting device along the width direction of the pole piece material belt. The slitting equipment according to any one of claims 1 to 7, characterized in that:

9. The slitting equipment according to any one of claims 1 to 8, further comprising a plurality of third conveying devices, each of the winding device and the second slitting device being provided with the third conveying device, and the plurality of third conveying devices being used to transport the plurality of pole pieces from the second slitting device to the plurality of winding devices.

10. The slitting equipment according to claim 9, further comprising a plurality of width measuring mechanisms, each of which is provided on each of the third conveying devices, and each of the width measuring mechanisms is used to measure the width of the pole piece conveyed by each of the third conveying devices.

11. The slitting equipment according to claim 9 or claim 10, further comprising a plurality of dust removal mechanisms, each of which is provided on each of the third conveying devices, and each of the dust removal mechanisms is used to remove dust from the pole pieces transported by each of the third conveying devices.

12. 12. The slitting machine of claim 11, wherein each said dedusting mechanism comprises one or more of a brush dedusting mechanism, an ultrasonic dedusting mechanism, and an air knife dedusting mechanism.

13. The slit equipment according to any one of claims 9 to 12, further comprising a plurality of static electricity removal mechanisms, each of which is provided on each of the third conveying devices, and each of the static electricity removal mechanisms is used to remove static electricity from the pole pieces transported by each of the third conveying devices.

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