Cutting and splicing device, film coating system and material belt cutting and splicing method

Abstract

The invention provides a cutting and splicing device, a film coating system and a material belt cutting and splicing method, and belongs to the technical field of batteries. The cutting and splicing device comprises a first cutting and splicing assembly and a second cutting and splicing assembly, wherein the first cutting and splicing assembly comprises a first cutter, a second cutter and a first pressing piece arranged between the first cutter and the second cutter; the second cutting and splicing assembly comprises a third cutter, a fourth cutter and a second pressing piece, the second pressing piece is arranged between the third cutter and the fourth cutter and faces the first pressing piece, and the first pressing piece and the second pressing piece can move towards each other; the first pressing piece and the second pressing piece are used for pressing the first material belt and the second material belt located between the first pressing piece and the second pressing piece so as to obtain a spliced material belt, and the first cutter and the fourth cutter are used for cutting off the material head of the pressed first material belt and the material tail of the pressed second material belt correspondingly. And the second cutter and the third cutter are respectively used for cutting off the material tail of the pressed first material belt and the material head of the pressed second material belt.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a cutting and splicing device for a material strip, a coating system for processing a battery cell, and a material strip cutting and splicing method. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] Blue film coating is an important process in the production of power batteries. Blue film is also called isolation film, anti-adhesion film, protective film, etc. It can have multiple colors such as red, green, blue, white, black, etc., and can be divided into single-sided release film and double-sided release film. As an insulating material, blue film can separate the battery cells from each other, thereby preventing the impact of various faults of a single battery cell on other batteries. Summary of the invention

[0004] The present application provides a cutting and splicing device for a material strip, a coating system for processing a battery cell, and a cutting and splicing method for a material strip.

[0005] The embodiment of the first aspect of the present application provides a cutting and splicing device for a material strip. The cutting and splicing device includes: a first cutting and splicing assembly, the first cutting and splicing assembly includes a first cutter, a second cutter and a first pressing member arranged between the first cutter and the second cutter; and a second cutting and splicing assembly, the second cutting and splicing assembly includes a third cutter, a fourth cutter and a second pressing member arranged between the third cutter and the fourth cutter and facing the first pressing member. The first pressing member and the second pressing member can move toward each other to press against the first material strip and the second material strip located between the first pressing member and the second pressing member to obtain a spliced ​​material strip, and the first cutter and the fourth cutter are respectively used to cut off the head of the pressed first material strip and the tail of the second material strip, and the second cutter and the third cutter are respectively used to cut off the tail of the pressed first material strip and the head of the second material strip.

[0006] In the technical solution of the embodiment of the present application, by pressing the first pressing member and the second pressing member, and by cutting with the cooperation of the first cutter and the fourth cutter, or by cutting with the cooperation of the second cutter and the third cutter, the cutting and splicing of the working material strip and the spare material strip can be completed without stopping the equipment. This improves the continuity of production. In the scenario of battery production, the coating efficiency of the blue film and the production efficiency of the battery can be improved.

[0007] In some embodiments, the first cutter and the second cutter are movably arranged in the first cutting and splicing assembly to cut the first material strip, and the third cutter and the fourth cutter are movably arranged in the second cutting and splicing assembly to cut the second material strip. Compared with the cutter directly abutting against the material strip to cut, the movable cutter cuts the pressed material strip, which can increase the probability of cutting the material strip, thereby further improving the cutting and splicing efficiency of the material strip.

[0008] In some embodiments, the first cutting and splicing assembly includes a first guide rail, a second guide rail, a first driver, and a second driver, the first driver is used to drive the first cutter to move along the first guide rail, and the second driver is used to drive the second cutter to move along the second guide rail; and wherein, the second cutting and splicing assembly includes a third guide rail, a fourth guide rail, a third driver, and a fourth driver, the third driver is used to drive the third cutter to move along the third guide rail, and the fourth driver is used to drive the fourth cutter to move along the fourth guide rail. Thus, the cutter is guided and driven by the guide rail and the driver, and by presetting the positions of the guide rail and the driver, the direction of the cutter movement can be made more accurate, so as to further improve the cutting and splicing efficiency of the material strip. And the first cutting and splicing assembly and the second cutting and splicing assembly can adapt to material strips of different specifications (for example, different widths) to accurately cut material strips of different specifications.

[0009] In some embodiments, the first cutting and splicing assembly further includes a first material tape contact roller disposed between the first pressing member and the first cutter, and a second material tape contact roller disposed between the first pressing member and the second cutter; and the second cutting and splicing assembly further includes a third material tape contact roller disposed between the second pressing member and the third cutter, and a fourth material tape contact roller disposed between the second pressing member and the fourth cutter. By arranging the first material tape contact roller and the second material tape contact roller on both sides of the first pressing member, and arranging the third material tape contact roller and the fourth material tape contact roller on both sides of the second pressing member, the material tape on both sides of the first pressing member and the second pressing member can be guided, thereby reducing the friction between the material tape and other components of the first cutting and splicing assembly or the second cutting and splicing assembly, thereby reducing damage to the surface of the material tape.

[0010] In some embodiments, the cutting and splicing device may further include: a first feed roller group and a second feed roller group. The first feed roller group includes: a first main roller for carrying a first material roll to be supplied; and a first material tape passing roller for guiding the first material tape from the first material roll to the first cutting and splicing assembly. The second feed roller group includes: a second main roller for carrying a second material roll to be supplied; and a second material tape passing roller for guiding the second material tape from the second material roll to the second cutting and splicing assembly. By setting the first feed roller group and the second feed roller group, the working material tape and the spare material tape can be placed in the cutting and splicing device 1 at the same time, whereby, when a working material tape is placed in one of the feed roller groups (for example, the first feed roller group), the user can place a spare material tape in another feed roller group (for example, the second feed roller group) without affecting the normal operation of the working material tape.

[0011] In some embodiments, the first main roller can rotate to at least partially pull the first material strip back from the first cutting and splicing assembly; and wherein the second main roller can rotate to at least partially pull the second material strip back from the second cutting and splicing assembly. Thus, in a scenario where the first pressing member and the second pressing member are close to each other, the first material strip or the second material strip can be at least partially pulled back by rotating the first main roller or the second main roller, so that part of the material strip at the material head position of the first material strip or the second material strip can be pulled between the first pressing member and the second pressing member, so that this part of the material strip can be better pressed.

[0012] In some embodiments, the first pressing member and the second pressing member can move away from each other. When the first pressing member and the second pressing member move away from each other, during the feeding process of the working material belt, the first pressing member or the second pressing member can be prevented from touching the working material belt, so that normal feeding can be performed. In addition, during the process of the first main roller or the second main roller rotating to partially pull back the first material belt or the second material belt, the gap between the first pressing member and the second pressing member provided by the movement of the first pressing member and the second pressing member away from each other also allows the returned part of the material belt to pass smoothly between the first pressing member and the second pressing member, thereby reducing the excessive friction of the first pressing member 130 and the second pressing member 230 on the returned part of the material belt.

[0013] In some embodiments, the first feed roller group further includes a first release paper recovery roller for pulling out the first release paper from the first material roll, and the first material tape passing roller is configured to guide the first material tape from which the first release paper has been separated to the first cutting and splicing assembly; and the second feed roller group includes a second release paper recovery roller for pulling out the second release paper from the second material roll, and the second material tape passing roller is configured to guide the second material tape from which the second release paper has been separated to the second cutting and splicing assembly. By providing the first release paper recovery roller and the second release paper recovery roller, the release paper in the blue film material roll can be recovered, thereby providing the material tape from which the release paper has been separated to the first cutting and splicing assembly and the second cutting and splicing assembly, so as to facilitate better bonding of the first material tape and the second material tape.

[0014] In some embodiments, the first feed roller group further includes a first release paper recovery buffer roller, which is disposed between the first main roller and the first release paper recovery roller, and is used to buffer the movement of the first release paper during the period when the first release paper recovery roller pulls out the first release paper from the first material roll; and the second feed roller group further includes a second release paper recovery buffer roller, which is disposed between the second main roller and the second release paper recovery roller, and is used to buffer the movement of the second release paper during the period when the second release paper recovery roller pulls out the second release paper from the second material roll. When the running speed of the release paper recovery roller does not match the speed at which the material tape is pulled out from the material roll, the material tape may tear or accumulate. By setting a first release paper recovery buffer roller and a second release paper recovery buffer roller, when the operating speed of the release paper recovery roller does not match the speed at which the material tape is pulled out from the material roll, the movement of the release paper can be buffered, thereby offsetting the speed difference between the operating speed of the release paper recovery roller and the speed at which the material tape is pulled out from the material roll, making the recovery of the release paper smoother and more stable.

[0015] In some embodiments, the cutting and splicing device further includes a first scrap receiving roller and a second scrap receiving roller, wherein the first scrap receiving roller is used to recover the head of the cut first material strip, and the second scrap receiving roller is used to recover the head of the cut second material strip. By providing the first scrap receiving roller and the second scrap receiving roller, the scrap of the spare material strip can be promptly received after the spare material strip and the working material strip are spliced ​​and the head of the spare material strip is cut by the first cutter or the third cutter, thereby preventing the scrap from interfering with or blocking the spliced ​​material strip, thereby further improving production efficiency.

[0016] In some embodiments, the cutting and splicing device further includes a fifth guide rail and a fifth driver, and the fifth driver is used to drive the first cutting and splicing assembly and the second cutting and splicing assembly to move toward or away from each other along the fifth guide rail. Thus, the first cutting and splicing assembly and the second cutting and splicing assembly are guided and driven by the guide rail and the driver, and by presetting the positions of the guide rail and the driver, the directions of movement of the first cutting and splicing assembly and the second cutting and splicing assembly can be made more accurate, so as to further improve the cutting and splicing efficiency of the material strip.

[0017] In some embodiments, the cutting and splicing device further includes a deviation correction mechanism, which is mechanically connected to at least one of the first feed roller group and the second feed roller group, and is used to compensate for the deviation of the first feed roller group or the second feed roller group during feeding. By providing the deviation correction mechanism, when the first feed roller group or the second feed roller group deviates during operation, the first feed roller group or the second feed roller group can be compensated for the deviation in time, thereby further improving production efficiency.

[0018] The embodiment of the second aspect of the present application provides a coating system for processing a battery cell. The coating system comprises: a cutting and splicing device according to the first aspect of the present application; and a coating device, which is used to coat the diaphragm received from the cutting and splicing device on the surface of the battery cell. In this way, the cutting and splicing of the working diaphragm and the spare diaphragm can be completed without stopping the equipment, which can improve the coating efficiency of the blue film and the production efficiency of the battery.

[0019] The embodiment of the third aspect of the present application provides a method for cutting and splicing a material strip using a cutting and splicing device. The cutting and splicing device includes: a first cutting and splicing assembly, the first cutting and splicing assembly includes a first cutter, a second cutter and a first pressing member arranged between the first cutter and the second cutter; and a second cutting and splicing assembly, the second cutting and splicing assembly includes a third cutter, a fourth cutter and a second pressing member arranged between the third cutter and the fourth cutter and facing the first pressing member. The method for cutting and splicing a material strip includes: providing a first material strip and a second material strip; controlling the first pressing member and the second pressing member to move toward each other to press against the first material strip and the second material strip located between the first pressing member and the second pressing member to obtain a spliced ​​material strip; and controlling the first cutter and the fourth cutter to respectively cut off the head of the pressed first material strip and the tail of the pressed second material strip, or controlling the second cutter and the third cutter to respectively cut off the tail of the pressed first material strip and the head of the second material strip. Thus, the cutting and splicing of the working material strip and the spare material strip can be completed without stopping the equipment. This improves the continuity of production. In the battery production scenario, the blue film coating efficiency and battery production efficiency can be improved.

[0020] In some embodiments, the cutting and splicing device may further include: a first main roller for carrying a first material roll including a first material tape; and a second main roller for carrying a second material roll including a second material tape. And the method may further include: controlling the first pressing member and the second pressing member to move away from each other; and controlling the first main roller to rotate to at least partially pull back the first material tape whose material head has been cut off from the first cutting and splicing assembly, or controlling the second main roller to rotate to at least partially pull back the second material tape whose material head has been cut off from the second cutting and splicing assembly. Thus, in a scenario where the first pressing member and the second pressing member are close to each other, the first material tape or the second material tape is at least partially pulled back by rotating the first main roller or the second main roller, so that part of the material tape at the material head position of the first material tape or the second material tape can be pulled between the first pressing member and the second pressing member, so that this part of the material tape can be better pressed.

[0021] In some embodiments, the cutting and splicing device may further include a first residual material receiving roller and a second residual material receiving roller, and the method may further include: controlling the first residual material receiving roller to rotate to recover the cut head of the first material strip, or controlling the second residual material receiving roller to rotate to recover the cut head of the second material strip. Thus, after the spare material strip and the working material strip are spliced ​​and the head of the spare material strip is cut by the first cutter or the third cutter, the residual material of the spare material strip can be received in time to prevent the residual material from interfering with or blocking the spliced ​​material strip, thereby further improving production efficiency.

[0022] In some embodiments, providing the first material tape and the second material tape may include: providing the first material tape from which the first release paper is separated; and providing the second material tape from which the second release paper is separated. Thus, in a scenario such as battery production, the release paper in the blue film roll can be recycled, so that the material tape from which the release paper is separated is provided to the first cutting and splicing assembly and the second cutting and splicing assembly, and the two material tapes from which the release paper is separated can be pasted through their adhesive surfaces, so as to facilitate better bonding of the first material tape and the second material tape.

[0023] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0025] Figure 1This is a schematic structural diagram of a cutting and splicing device for a material strip according to some embodiments of the present application;

[0026] Figure 2A and Figure 2B This is a schematic structural diagram of a first cutting and splicing component of a cutting and splicing device according to some embodiments of the present application;

[0027] Figure 3A and Figure 3B This is a schematic structural diagram of a second cutting and splicing assembly of a cutting and splicing device according to some embodiments of the present application;

[0028] Figures 4 to 7 This is a front view of a cutting and splicing device according to some embodiments of the present application;

[0029] Figure 8 This is a schematic structural diagram of a first feed roller group of a cutting and splicing device in some embodiments of the present application;

[0030] Fig. 9 A rear view of a cutting and splicing device according to some embodiments of the present application;

[0031] Fig.10 A flow chart of a method for cutting and splicing a material strip using a cutting and splicing device according to some embodiments of the present application; and

[0032] Fig.11 It is a schematic diagram of cutting and splicing a material strip using the material strip cutting and splicing method of an embodiment of the present application. DETAILED DESCRIPTION

[0033] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0035] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0036] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0037] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0038] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0039] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0040] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0041] As mentioned above, blue film coating is an important process in the production process of power batteries. Blue film (or isolation film) is usually supplied in the form of a roll. By obtaining the blue film from the blue film roll, the blue film is wrapped and coated on the battery cell. In the related art, after the current blue film roll is used up, the coating equipment needs to be shut down, and a new blue film roll is manually replaced, and the blue film tape before replacement is manually spliced ​​with the blue film tape after replacement to form a continuous tape. After completing the blue film roll replacement and splicing work, the coating equipment can be restarted to continue the blue film coating process.

[0042] However, since the coating equipment needs to be shut down, blue film coating cannot be continued during the shutdown process, which affects the continuity of production and reduces the production efficiency of the battery.

[0043] In view of this, the present application provides a cutting and splicing device for a material strip and a coating system for processing a battery cell.

[0044] The cutting and splicing device disclosed in the embodiment of the present application can be used in battery production, for example, it can cut and splice blue film strips for battery cells. In addition, the cutting and splicing device disclosed in the embodiment of the present application can also be applied to other scenarios where it is necessary to cut and splice strips to achieve continuous production.

[0045] The present application embodiment provides a cutting and splicing device for a material strip. Figures 1 to 7 ,in, Figure 1 This is a schematic structural diagram of a cutting and splicing device for a material strip according to some embodiments of the present application; Figure 2A and Figure 2B This is a schematic structural diagram of a first cutting and splicing component of a cutting and splicing device according to some embodiments of the present application; Figure 3A and Figure 3B A schematic diagram of the structure of a second cutting and splicing assembly of a cutting and splicing device in some embodiments of the present application; and Figures 4 to 7 This is a front view of a cutting and splicing device according to some embodiments of the present application.

[0046] First, if Figure 1 As shown, the cutting and splicing device 1 includes: a first cutting and splicing component 100 and a second cutting and splicing component 200 .

[0047] Continue to refer Figure 2A and Figure 2B The first cutting and splicing assembly 100 includes a first cutter 110 , a second cutter 120 , and a first pressing member 130 disposed between the first cutter 110 and the second cutter 120 .

[0048] Continue to refer Figure 3A and Figure 3BThe second cutting and splicing assembly 200 includes a third cutter 210 , a fourth cutter 220 , and a second pressing member 230 disposed between the third cutter 210 and the fourth cutter 220 and facing the first pressing member 130 .

[0049] The first pressing member 130 and the second pressing member 230 can move toward each other to press the first material strip 901 and the second material strip 902 between the first pressing member 130 and the second pressing member 230 to obtain the spliced ​​material strips. The first cutter 110 and the fourth cutter 220 are used to cut off the head of the pressed first material strip 901 and the tail of the second material strip 902, respectively, and the second cutter 120 and the third cutter 210 are used to cut off the tail of the pressed first material strip 901 and the head of the second material strip 902, respectively.

[0050] The first cutting and splicing assembly 100 and the second cutting and splicing assembly 200 in the cutting and splicing device 1 can be arranged opposite to each other. And the first cutting and splicing assembly 100 and the second cutting and splicing assembly 200 can have a symmetrical structure. For example, the first pressing member 130 can have the same shape as the second pressing member 230, and the two can be arranged opposite to each other. In addition, the first cutter 110 can be arranged opposite to the third cutter 210; the second cutter 120 can be arranged opposite to the fourth cutter 220.

[0051] refer to Figure 4 ,exist Figure 4 In the embodiment, the first cutting and splicing assembly 100 and the second cutting and splicing assembly 200 are separated from each other by a distance. In this case, the first material belt 901 and the second material belt 902 passing through the first cutting and splicing assembly 100 and the second cutting and splicing assembly 200 may not interfere with each other. Figure 4 In the example shown, the first material belt 901 can be used as a working material belt and is led out by the output roller 710 of the cutting and splicing device 1; while the second material belt 902 can be used as a spare material belt and is temporarily not in contact with the output roller 710. Figure 5 , the first cutting and splicing assembly 100 and the second cutting and splicing assembly 200 can move toward each other, so that the first pressing member 130 and the second pressing member 230 can move toward each other to press the first material strip 901 and the second material strip 902 located between the first pressing member 130 and the second pressing member 230 to obtain the spliced ​​material strips. When the first pressing member 130 and the second pressing member 230 move toward each other and contact each other, the first material strip 901 and the second material strip 902 can be pressed together. In the example, the surfaces of the first material strip 901 and the second material strip 902 to be in contact with each other can be provided with adhesive to promote adhesion between the two.

[0052] Continue to refer FIG. 2A to FIG. 3B and Figure 5The second cutter 120 and the third cutter 210 are used to cut off the tail of the first material strip 901 and the head of the second material strip 902 respectively. Figure 5 In the embodiment, the second cutter 120 located at the lower part of the first cutting and splicing assembly 100 is used to cut off the tail of the pressed first material strip 901 (ie, Figure 5 The first material strip 901 is located below the first cutting and splicing assembly 100); accordingly, the third cutter 210 located at the upper part of the second cutting and splicing assembly 200 is used to cut off the material head of the pressed second material strip 902 (ie, Figure 5 Thus, when the working tape (first tape 901) is about to be exhausted, the first tape 901 is disconnected from its tail position by the pressing of the first pressing member 130 and the second pressing member 230, and the cooperation and cutting of the second cutter 120 and the third cutter 210; and the spare tape (second tape 902) is disconnected from its head position, and the rest of the second tape 902 is spliced ​​to the current working tape, so that the cutting and splicing of the working tape and the spare tape can be completed without stopping the equipment.

[0053] Figure 6 and Figure 7 Shown with Figure 4 and Figure 5 Similar situations. Figure 6 As shown, the second material belt 902 can be used as a working material belt to be led out by the output roller 710 of the cutting and splicing device 1; while the first material belt 901 can be used as a spare material belt and temporarily does not come into contact with the output roller 710. Figure 7 , the first cutting and splicing assembly 100 and the second cutting and splicing assembly 200 can move toward each other, so that the first pressing member 130 and the second pressing member 230 can move toward each other to press the first material strip 901 and the second material strip 902 between the first pressing member 130 and the second pressing member 230 to obtain the spliced ​​material strips. When the first pressing member 130 and the second pressing member 230 move toward each other and contact each other, the first material strip 901 and the second material strip 902 can be pressed together.

[0054] Continue to refer to the figure FIG. 2A to FIG. 3B and Figure 7 The first cutter 110 and the fourth cutter 220 are used to cut off the head of the first material strip 901 and the tail of the second material strip 902 respectively. Figure 7 In the embodiment, the first cutter 110 located at the upper part of the first cutting and splicing assembly 100 is used to cut off the material head (ie, Figure 7The first material strip 901 is located above the first cutting and splicing assembly 100); accordingly, the fourth cutter 220 located at the lower part of the second cutting and splicing assembly 200 is used to cut off the tail of the pressed second material strip 902 (ie, Figure 7 Thus, when the working tape (second tape 902) is about to be exhausted, the second tape 902 is cut off from its tail position by the pressing of the first pressing member 130 and the second pressing member 230, and the cooperation and cutting of the first cutter 110 and the fourth cutter 220; and the spare tape (first tape 901) is cut off from its head position, and the rest of the first tape 901 is spliced ​​to the current working tape, so that the cutting and splicing of the working tape and the spare tape can be completed without stopping the equipment.

[0055] In an example, the first material strip 901 and the second material strip 902 may be blue films (isolation films) for wrapping battery cells.

[0056] Thus, by pressing the first pressing member 130 and the second pressing member 230, and by the cooperation and cutting of the first cutter 110 and the fourth cutter 220, or by the cooperation and cutting of the second cutter 120 and the third cutter 210, the cutting and splicing of the working material strip and the spare material strip can be completed without stopping the equipment. This improves the continuity of production. In the scenario of battery production, the coating efficiency of the blue film and the production efficiency of the battery can be improved.

[0057] According to some embodiments of the present application, the first cutter 110 and the second cutter 120 can be movably arranged in the first cutting and splicing assembly 100 to cut the first material strip 901, and the third cutter 210 and the fourth cutter 220 can be movably arranged in the second cutting and splicing assembly 200 to cut the second material strip 902.

[0058] For example, in Figures 4 to 7 In the embodiment, the first cutter 110 and the second cutter 120 can be arranged to be movable perpendicular to the XZ plane, so as to be able to move along the XZ plane. Figure 1 The first material strip 901 is cut in the direction indicated by Y in FIG. The third cutter 210 and the fourth cutter 220 can also be configured to be able to move perpendicular to the XZ plane, so as to be able to move along the XZ plane. Figure 1 The second material strip 902 is cut in the direction indicated by Y.

[0059] In the example, the first cutter 110, the second cutter 120, the third cutter 210 and the fourth cutter 220 may each have a single-sided blade or a double-sided blade. For example, the first cutter 110, the second cutter 120, the third cutter 210 and the fourth cutter 220 may each have a single-sided blade, and the cutter may be moved, for example, perpendicular to the XZ plane, from one side of the material strip to the other side of the material strip to cut the corresponding material strip. When the cutter has a double-sided blade, the starting cutting position of the cutter may be set more flexibly.

[0060] Thus, relative to the cutting edge, for example Figure 4 The X direction in the cutting machine is directly against the material strip for cutting, and the movable cutter is used to cut the pressed material strip by slicing, which can increase the probability of cutting the material strip, thereby further improving the cutting and splicing efficiency of the material strip.

[0061] According to some embodiments of the present application, continue to refer to Figure 2B The first cutting and splicing assembly 100 may include a first guide rail 130, a second guide rail 140, a first driver 150 and a second driver 160. The first driver 150 is used to drive the first cutter 110 to move along the first guide rail 130, and the second driver 160 is used to drive the second cutter 120 to move along the second guide rail 140. Figure 3B The second cutting and splicing assembly 200 may include a third guide rail 230, a fourth guide rail 240, a third driver 250 and a fourth driver 260, the third driver 250 is used to drive the third cutter 210 to move along the third guide rail 230, and the fourth driver 260 is used to drive the fourth cutter 220 to move along the fourth guide rail 240.

[0062] The first guide rail 130, the second guide rail 140, the third guide rail 230, and the fourth guide rail 240 may be linear guide rails, and the first guide rail 130, the second guide rail 140, the third guide rail 230, and the fourth guide rail 240 may be linear guide rails. Figure 1 The first driver 150, the second driver 160, the third driver 250 and the fourth driver 260 can be linear motors, pneumatic elements (such as cylinders), or screw transmission mechanisms.

[0063] Thus, the cutter is guided and driven by the guide rail and the driver, and the position of the guide rail and the driver is pre-set, so that the direction of the cutter movement can be more accurate, so as to further improve the cutting and splicing efficiency of the material strip. In addition, the first cutting and splicing assembly 100 and the second cutting and splicing assembly 200 can adapt to material strips of different specifications (for example, different widths) to accurately cut material strips of different specifications.

[0064] According to some embodiments of the present application, continue to refer to Figure 2AThe first cutting and splicing assembly 100 may further include a first material strip contact roller 170 disposed between the first pressing member 130 and the first cutter 110, and a second material strip contact roller 180 disposed between the first pressing member 130 and the second cutter 120. Figure 3A The second cutting and splicing assembly 200 may further include a third material tape contact roller 270 disposed between the second pressing member 230 and the third cutter 210 , and a fourth material tape contact roller 280 disposed between the second pressing member 230 and the fourth cutter 220 .

[0065] In the example, the surface materials of the first material belt contact roller 170 , the second material belt contact roller 180 , the third material belt contact roller 270 and the fourth material belt contact roller 280 may have a preset friction force for guiding the material belt on both sides of the first pressing member 130 and the second pressing member 230 .

[0066] In the example, the outermost surfaces of the first and second material contact rollers 170 and 180 may be flush with the front surfaces of the corresponding first pressing members 130 ; and the outermost surfaces of the third and fourth material contact rollers 270 and 280 may be flush with the front surfaces of the corresponding second pressing members 230 .

[0067] By arranging a first material strip contact roller 170 and a second material strip contact roller 180 on both sides of the first pressing member 130, and arranging a third material strip contact roller 270 and a fourth material strip contact roller 280 on both sides of the second pressing member 230, the material strip on both sides of the first pressing member 130 and the second pressing member 230 can be guided, thereby reducing the friction between the material strip and other components of the first cutting and splicing assembly 100 or the second cutting and splicing assembly 200, thereby reducing damage to the surface of the material strip.

[0068] According to some embodiments of the present application, continue to refer to Figure 1 The cutting and splicing device 1 may further include: a first feed roller group 300 and a second feed roller group 400 .

[0069] The first feed roller set 300 includes: a first main roller 310 for carrying the first material roll to be supplied; and a first material tape passing roller 320 for guiding the first material tape from the first material roll to the first cutting and splicing assembly 100 .

[0070] The second feed roller set 400 may include: a second main roller 410 for carrying the second material roll to be supplied; and a second material tape passing roller 420 for guiding the second material tape from the second material roll to the second cutting and splicing assembly 200 .

[0071] In the example, the first main roller 310 and the second main roller 410 can be respectively mounted on the bracket to carry the first material roll and the second material roll to be supplied. The first material tape passing roller 320 can be arranged between the first main roller 310 and the first cutting and splicing assembly 100 to guide the first material tape from the first material roll to the first cutting and splicing assembly 100; the second material tape passing roller 420 can be arranged between the second main roller 410 and the second cutting and splicing assembly 200 to guide the second material tape from the second material roll to the second cutting and splicing assembly 200.

[0072] It will be understood that the number of the first feed roller 320 and the second feed roller 420 may be more than one. For example, the first feed roller set 300 may include a plurality of first feed rollers 320 , and the second feed roller set 400 may include a plurality of second feed rollers 420 .

[0073] By setting the first feed roller group 300 and the second feed roller group 400, the working material tape and the spare material tape can be placed in the cutting and splicing device 1 at the same time. Therefore, when the working material tape is placed in one of the feed roller groups (for example, the first feed roller group 300), the user can place the spare material tape in the other feed roller group (for example, the second feed roller group 400) without affecting the normal operation of the working material tape.

[0074] According to some embodiments of the present application, the first main roller 310 can rotate to at least partially pull the first material tape back from the first cutting and splicing assembly 100 ; and the second main roller 410 can rotate to at least partially pull the second material tape back from the second cutting and splicing assembly 200 .

[0075] When the material belt (such as the first material belt 901) is being fed, the pulled material belt can drive the main roller (such as the first main roller 310) to rotate due to the traction of the rear equipment. Figure 4 In the example, the pulled first material belt 901 can drive the first main roller 310 to rotate clockwise.

[0076] Accordingly, in the example, the first main roller 310 can rotate to at least partially pull the first material strip 901 back from the first cutting and splicing assembly 100, which means that the first main roller 310 can actively rotate counterclockwise to pull the first material strip 901 back from the first cutting and splicing assembly 100 to the material roll.

[0077] Similarly, in the example, the second main roller 410 can actively rotate counterclockwise to pull the second material strip from the second cutting and splicing assembly 200 back to the material roll.

[0078] Thus, in e.g. Figure 5 and Figure 7In the scenario shown in FIG. 1 , where the first pressing member 130 and the second pressing member 230 are close to each other, the first material strip or the second material strip is at least partially pulled back by rotating the first main roller 310 or the second main roller 410, so that the material head position (for example, Figure 5 or Figure 7 A portion of the first material strip or the second material strip (located above the first cutting and splicing assembly 100 and the second cutting and splicing assembly 200) is pulled between the first pressing member 130 and the second pressing member 230, so that this portion of the material strip can be better pressed.

[0079] According to some embodiments of the present application, the first pressing member 130 and the second pressing member 230 are capable of moving away from each other.

[0080] Continue to refer Figures 4 to 5 The first cutting and splicing assembly 100 and the second cutting and splicing assembly 200 can both be Figure 5 Move to the position shown Figure 4 The first pressing member 130 and the second pressing member 230 are moved away from each other.

[0081] When the first pressing member 130 and the second pressing member 230 move away from each other, during the feeding process of the working material strip, the first pressing member 130 or the second pressing member 230 can be prevented from touching the working material strip, so that normal feeding can be performed. In addition, during the process of the first main roller 310 or the second main roller 410 rotating to partially pull back the first material strip or the second material strip, the gap between the first pressing member 130 and the second pressing member 230 provided by the movement of the first pressing member 130 and the second pressing member 230 away from each other also allows the returned part of the material strip to pass smoothly between the first pressing member 130 and the second pressing member 230, thereby reducing the excessive friction of the first pressing member 130 and the second pressing member 230 on the returned part of the material strip.

[0082] According to some embodiments of the present application, continue to refer to Figure 1 The first feed roller group 300 may also include a first release paper recovery roller 330 for pulling out the first release paper from the first material roll, and the first material tape roller 320 may be configured to guide the first material tape from which the first release paper is separated to the first cutting and splicing assembly 100; and the second feed roller group 400 may include a second release paper recovery roller 430 for pulling out the second release paper from the second material roll, and the second material tape roller 420 may be configured to guide the second material tape from which the second release paper is separated to the second cutting and splicing assembly 200.

[0083] For example, in the scenario of blue film coating, the blue film in the material roll is usually covered with a layer of release paper, which is used to cover the side surface of the blue film tape with adhesive. After tearing off the release paper, the side surface of the blue film tape with adhesive can be exposed, and the adhesive is conducive to better coating the blue film on the battery cell.

[0084] In an example, the first release paper recovery roller 330 and the second release paper recovery roller 430 may be driven to rotate by a motor to actively collect the release paper.

[0085] By providing the first release paper recovery roller 330 and the second release paper recovery roller 430, the release paper in the blue film roll can be recovered, thereby providing the first cutting and splicing component 100 and the second cutting and splicing component 200 with a material strip with the release paper separated. The two material strips with the release paper separated can be pasted together through their adhesive surfaces, thereby facilitating better bonding of the first material strip and the second material strip.

[0086] According to some embodiments of the present application, continue to refer to Figure 1 The first feed roller set 300 may further include a first release paper recovery buffer roller 340, which is disposed between the first main roller 310 and the first release paper recovery roller 330, and is used to buffer the movement of the first release paper during the period when the first release paper recovery roller 330 pulls out the first release paper from the first material roll. And the second feed roller set 400 may further include a second release paper recovery buffer roller 440, which is disposed between the second main roller 410 and the second release paper recovery roller 430, and is used to buffer the movement of the second release paper during the period when the second release paper recovery roller 430 pulls out the second release paper from the second material roll.

[0087] In an example, the first release paper recovery buffer roller 340 and the second release paper recovery buffer roller 440 may be elastically mounted on a bracket (eg, via a spring or a damper). Figure 8 This is a schematic diagram of the structure of the first feed roller group of the cutting and splicing device in some embodiments of the present application. Figure 8 As shown, the first release paper recovery buffer roller 340 can be installed on the bracket through a spring mechanism 341.

[0088] When the running speed of the release paper recovery roller does not match the speed at which the material strip is pulled out from the material roll, the material strip may be torn or piled up. By providing the first release paper recovery buffer roller 340 and the second release paper recovery buffer roller 440, when the running speed of the release paper recovery roller does not match the speed at which the material strip is pulled out from the material roll, the movement of the release paper can be buffered, thereby offsetting the speed difference between the running speed of the release paper recovery roller and the speed at which the material strip is pulled out from the material roll, making the recovery of the release paper more stable and smooth.

[0089] According to some embodiments of the present application, continue to refer to Figure 1 The cutting and splicing device 1 may further include a first waste material receiving roller 500 and a second waste material receiving roller 600, wherein the first waste material receiving roller 500 is used to recover the cut ends of the first material strip, and the second waste material receiving roller 600 is used to recover the cut ends of the second material strip.

[0090] like Figure 1 as well as Figures 4 to 7 As shown, the first scrap receiving roller 500 can be arranged on the first cutting and splicing assembly 100, in other words, the first cutting and splicing assembly 100 can be arranged between the first scrap receiving roller 500 and the first feeding roller group 300. Similarly, the second scrap receiving roller 600 can be arranged on the second cutting and splicing assembly 200, in other words, the second cutting and splicing assembly 200 can be arranged between the second scrap receiving roller 600 and the second feeding roller group 400.

[0091] In an example, the first remnant receiving roller 500 and the second remnant receiving roller 600 may be driven to rotate by a motor to actively collect remnants of the first material strip or the second material strip.

[0092] By providing the first residual material receiving roller 500 and the second residual material receiving roller 600, it is possible to promptly receive the residual material of the spare material tape after the spare material tape and the working material tape are spliced ​​and the material head of the spare material tape is cut off by the first cutter 110 or the third cutter 210, thereby preventing the residual material from interfering with or blocking the spliced ​​material tape, thereby further improving production efficiency.

[0093] It will be understood that the number of rollers in the first feed roller group 300 and the second feed roller group 400 in the above embodiment can be adjusted according to demand. In addition, the first waste material receiving roller 500 in the above embodiment can also include multiple waste material receiving rollers, and the second waste material receiving roller 600 can also include multiple waste material receiving rollers.

[0094] According to some embodiments of the present application, reference Fig. 9 , Fig. 9 The cutting and splicing device 1 may further include a fifth guide rail 720 and a fifth driver 730 , wherein the fifth driver 730 is used to drive the first cutting and splicing assembly 100 and the second cutting and splicing assembly 200 to move toward or away from each other along the fifth guide rail 720 .

[0095] In an example, the fifth driver 730 may be a linear motor, a pneumatic element (e.g., a cylinder), or a lead screw transmission mechanism. A portion of the fifth driver 730 may be fixed to a bracket, and another portion of the fifth driver 730 may be connected to the first cutting and splicing assembly 100 and the second cutting and splicing assembly 200, respectively. The fifth driver 730 may be one, two, or more. Fig. 9 The example of FIG. 7 shows two fifth drivers 730. In addition, the fifth guide rail 720 may be arranged along the following lines: Fig. 9 X direction settings shown.

[0096] Therefore, the first cutting and splicing assembly 100 and the second cutting and splicing assembly 200 are guided and driven by the guide rails and the driver. By presetting the positions of the guide rails and the driver, the movement directions of the first cutting and splicing assembly 100 and the second cutting and splicing assembly 200 can be made more precise, thereby further improving the cutting and splicing efficiency of the material strip.

[0097] According to some embodiments of the present application, Figure 1 and Fig. 9 As shown, the cutting and splicing device 1 may further include a deviation correction mechanism 800, which is mechanically connected to at least one of the first feed roller group 300 and the second feed roller group 400, and is used to compensate for the offset of the first feed roller group 300 or the second feed roller group 400 during feeding.

[0098] In an example, two deviation correcting mechanisms 800 may be provided, one deviation correcting mechanism 800 is used to connect with the first feed roller set 300 , and the other deviation correcting mechanism 800 is used to connect with the second feed roller set 400 .

[0099] By providing the deviation correction mechanism 800, when the first feed roller group 300 or the second feed roller group 400 has a belt deviation during operation, the first feed roller group 300 or the second feed roller group 400 can be promptly compensated for the deviation, thereby further improving production efficiency.

[0100] The embodiment of the present application provides a coating system for processing a battery cell (not shown in the figure). The coating system comprises: a cutting and splicing device 1 and a coating device, wherein the coating device is used to coat the diaphragm received from the cutting and splicing device 1 on the surface of the battery cell.

[0101] The wrapping device can be arranged close to the cutting and splicing device 1 , and can receive the spliced ​​material strips from the output roller 710 of the cutting and splicing device 1 .

[0102] Therefore, by pressing the first pressing member 130 and the second pressing member 230, and by the coordinated cutting of the first cutter 110 and the fourth cutter 220, or by the coordinated cutting of the second cutter 120 and the third cutter 210, the cutting and splicing of the working diaphragm and the spare diaphragm can be completed without stopping the equipment, thereby improving the blue film coating efficiency and the battery production efficiency.

[0103] The embodiment of the present application provides a method for cutting and splicing a material strip using a cutting and splicing device. The cutting and splicing device includes: a first cutting and splicing assembly, the first cutting and splicing assembly includes a first cutter, a second cutter, and a first pressing member disposed between the first cutter and the second cutter; and a second cutting and splicing assembly, the second cutting and splicing assembly includes a third cutter, a fourth cutter, and a second pressing member disposed between the third cutter and the fourth cutter and facing the first pressing member.

[0104] Fig.10 Flow chart of a method 1000 for cutting and splicing a material strip using a cutting and splicing device according to some embodiments of the present application. Fig.10 As shown, method 1000 includes:

[0105] Step S1001, providing a first material tape and a second material tape;

[0106] Step S1002, controlling the first pressing member and the second pressing member to move toward each other to press the first material strip and the second material strip between the first pressing member and the second pressing member to obtain a spliced ​​material strip; and

[0107] Step S1003, control the first cutter and the fourth cutter to cut off the head of the pressed first material strip and the tail of the second material strip respectively, or control the second cutter and the third cutter to cut off the tail of the pressed first material strip and the head of the second material strip respectively.

[0108] In the example, the above description of Figures 1 to 9 The described cutting and splicing device performs method 1000 .

[0109] For example, in Figures 4 to 5In the example shown, the first material tape 901 provided can be used as a working material tape, and the second material tape 902 provided can be used as a spare material tape. When the first material tape 901 is about to be exhausted, the first pressing member and the second pressing member move toward each other to press the first material tape and the second material tape between the first pressing member and the second pressing member to obtain a spliced ​​material tape. Through the coordinated cutting of the second cutter 120 and the third cutter 210, the first material tape 901 is disconnected from its tail position; and the spare material tape (second material tape 902) is disconnected from its head position, and the rest of the second material tape 902 is spliced ​​to the current working material tape, so that the cutting and splicing of the working material tape and the spare material tape can be completed without stopping the equipment.

[0110] For example, in Figure 6 As Figure 7 In the example shown, the first material tape 901 provided can be used as a spare material tape, and the second material tape 902 provided can be used as a working material tape. When the working material tape (second material tape 902) is about to be exhausted, the first pressing member and the second pressing member move toward each other to press the first material tape and the second material tape located between the first pressing member and the second pressing member to obtain a spliced ​​material tape. Through the coordinated cutting of the first cutter 110 and the fourth cutter 220, the second material tape 902 is disconnected from its tail position; and the spare material tape (first material tape 901) is disconnected from its head position, and the rest of the first material tape 901 is spliced ​​to the current working material tape, so that the cutting and splicing of the working material tape and the spare material tape can be completed without stopping the equipment.

[0111] As a result, the cutting and splicing of the working material strip and the spare material strip can be completed without stopping the equipment. This improves the continuity of production. In the battery production scenario, it can improve the blue film coating efficiency and battery production efficiency.

[0112] According to some embodiments of the present application, the cutting and splicing device may further include: a first main roller for carrying a first material roll including a first material tape; and a second main roller for carrying a second material roll including a second material tape. In addition, the method 1000 may further include:

[0113] controlling the first pressing member and the second pressing member to move away from each other; and

[0114] The first main roller is controlled to rotate to at least partially pull the first material strip with the cut ends back from the first cutting and splicing assembly, or the second main roller is controlled to rotate to at least partially pull the second material strip with the cut ends back from the second cutting and splicing assembly.

[0115] In an example, the first main roller may include the first main roller 310 described above, and the second main roller may include the second main roller 410 described above.

[0116] Thus, in a scenario where the first pressing member and the second pressing member are close to each other, the first material strip or the second material strip can be at least partially pulled back by rotating the first main roller or the second main roller, so that part of the material strip at the head position of the first material strip or the second material strip can be pulled between the first pressing member and the second pressing member, so that this part of the material strip can be better pressed. In addition, since the first pressing member and the second pressing member move away from each other, during the process of the first main roller or the second main roller rotating to partially pull back the first material strip or the second material strip, the gap between the first pressing member and the second pressing member moving away from each other also allows the returned part of the material strip to pass smoothly between the first pressing member and the second pressing member, thereby reducing excessive friction of the first pressing member 130 and the second pressing member 230 on the returned part of the material strip.

[0117] According to some embodiments of the present application, the cutting and splicing device may further include a first scrap receiving roller and a second scrap receiving roller. In addition, method 1000 may further include: controlling the first scrap receiving roller to rotate to recycle the cut first material strip, or controlling the second scrap receiving roller to rotate to recycle the cut second material strip.

[0118] In an example, the first scrap receiving roller may include the first scrap receiving roller 500 described above, and the second scrap receiving roller may include the second scrap receiving roller 600 described above.

[0119] Therefore, after the spare material tape and the working material tape are spliced ​​and the material head of the spare material tape is cut off by the first cutter 110 or the third cutter 210, the remaining material of the spare material tape can be received in time to prevent the remaining material from interfering with or blocking the spliced ​​material tape, thereby further improving production efficiency.

[0120] According to some embodiments of the present application, the above step S1001 may include: providing a first material tape from which a first release paper is separated; and providing a second material tape from which a second release paper is separated. Thus, in a scenario such as battery production, the release paper in the blue film roll can be recycled, thereby providing the material tape from which the release paper is separated to the first cutting and splicing assembly 100 and the second cutting and splicing assembly 200, and the two material tapes from which the release paper is separated can be pasted through their adhesive surfaces, thereby facilitating better bonding of the first material tape and the second material tape.

[0121] The technical solution of the present application is further described below through a specific embodiment.

[0122] like Figures 1 to 9As shown, the cutting and splicing device 1 includes: a first cutting and splicing assembly 100 and a second cutting and splicing assembly 200. The first cutting and splicing assembly 100 includes a movable first cutter 110, a second cutter 120, and a first pressing member 130 disposed between the first cutter 110 and the second cutter 120. The second cutting and splicing assembly 200 includes a movable third cutter 210, a fourth cutter 220, and a second pressing member 230 disposed between the third cutter 210 and the fourth cutter 220 and facing the first pressing member 130.

[0123] The cutting and splicing device 1 further includes a fifth guide rail 720 and a fifth driver 730, and the fifth driver 730 is used to drive the first cutting and splicing assembly 100 and the second cutting and splicing assembly 200 to move toward or away from each other along the fifth guide rail 720. The cutting and splicing device 1 further includes a deviation correction mechanism 800, which is mechanically connected to at least one of the first feed roller group 300 and the second feed roller group 400, and is used to compensate for the deviation of the first feed roller group 300 or the second feed roller group 400 during feeding.

[0124] Under the action of the fifth driver 730, the first pressing member 130 and the second pressing member 230 can move toward each other to press the first material strip 901 and the second material strip 902 between the first pressing member 130 and the second pressing member 230 to obtain the spliced ​​material strips. The first cutter 110 and the fourth cutter 220 are used to slide and cut the head of the pressed first material strip 901 and the tail of the second material strip 902, respectively, and the second cutter 120 and the third cutter 210 are used to slide and cut the tail of the pressed first material strip 901 and the head of the second material strip 902, respectively.

[0125] The first cutting and splicing assembly 100 includes a first guide rail 130, a second guide rail 140, a first driver 150 and a second driver 160. The first driver 150 is used to drive the first cutter 110 to move along the first guide rail 130, and the second driver 160 is used to drive the second cutter 120 to move along the second guide rail 140. The second cutting and splicing assembly 200 may include a third guide rail 230, a fourth guide rail 240, a third driver 250 and a fourth driver 260. The third driver 250 is used to drive the third cutter 210 to move along the third guide rail 230, and the fourth driver 260 is used to drive the fourth cutter 220 to move along the fourth guide rail 240.

[0126] The first cutting and splicing assembly 100 further includes a first material tape contact roller 170 disposed between the first pressing member 130 and the first cutter 110, and a second material tape contact roller 180 disposed between the first pressing member 130 and the second cutter 120. The second cutting and splicing assembly 200 may further include a third material tape contact roller 270 disposed between the second pressing member 230 and the third cutter 210, and a fourth material tape contact roller 280 disposed between the second pressing member 230 and the fourth cutter 220.

[0127] In addition, the cutting and splicing device 1 further includes: a first feed roller set 300 and a second feed roller set 400 .

[0128] The first feed roller group 300 includes: a first main roller 310, used to carry the first material roll to be supplied; and a first material tape passing roller 320, used to guide the first material tape from the first material roll to the first cutting and splicing assembly 100; the first feed roller group 300 also includes a first release paper recovery roller 330, used to pull out the first release paper from the first material roll, and the first material tape passing roller 320 can be configured to guide the first material tape from which the first release paper has been separated to the first cutting and splicing assembly 100; the first feed roller group 300 also includes a first release paper recovery buffer roller 340, which is arranged between the first main roller 310 and the first release paper recovery roller 330, and is used to buffer the movement of the first release paper during the period when the first release paper recovery roller 330 pulls out the first release paper from the first material roll.

[0129] The second feed roller set 400 includes: a second main roller 410 for carrying the second material roll to be supplied; and a second material tape passing roller 420 for guiding the second material tape from the second material roll to the second cutting and splicing assembly 200; and the second feed roller set 400 may include a second release paper recovery roller 430 for pulling out the second release paper from the second material roll, and the second material tape passing roller 420 may be configured to guide the second material tape from which the second release paper has been separated to the second cutting and splicing assembly 200. The second feed roller set 400 also includes a second release paper recovery buffer roller 440, which is disposed between the second main roller 410 and the second release paper recovery roller 430, and is used to buffer the movement of the second release paper during the period when the second release paper recovery roller 430 pulls out the second release paper from the second material roll.

[0130] Furthermore, the first main roller 310 can rotate to at least partially pull the first material strip back from the first cutting and splicing assembly 100, and the second main roller 410 can rotate to at least partially pull the second material strip back from the second cutting and splicing assembly 200. The first pressing member 130 and the second pressing member 230 can move away from each other.

[0131] The cutting and splicing device 1 further comprises a first residual material receiving roller 500 and a second residual material receiving roller 600. The first residual material receiving roller 500 is used to recover the cut ends of the first material strip, and the second residual material receiving roller 600 is used to recover the cut ends of the second material strip.

[0132] In addition, reference Fig.11 , Fig.11 Schematic diagram of cutting and splicing a material strip using the material strip cutting and splicing method of an embodiment of the present application. First, a first material strip 1101 and a second material strip 1102 may be provided. Fig.11 As shown in state A in the figure, the first material tape 1101 can be used as a working material tape and exported from the output roller 1110 of the cutting and splicing device, while the second material tape 1102 can be used as a spare material tape and temporarily wound on the second residual material receiving roller 1120.

[0133] like Fig.11 As shown in state B in FIG. 1 , when the working tape (the first tape 1101) is about to be exhausted, the first pressing member and the second pressing member move toward each other to press the first tape 1101 and the second tape 1102 between the first pressing member and the second pressing member to obtain a spliced ​​tape. Fig.11 As shown in state C, the first material tape 1101 is cut off from its tail position by the cooperation of the second cutter and the third cutter; the spare material tape (the second material tape 1102) is cut off from its head position, and the rest of the second material tape 1102 is spliced ​​to the current working material tape, so that the cutting and splicing of the working material tape and the spare material tape can be completed without stopping the equipment. Fig.11 As shown in state D, the second residual material receiving roller 1120 rotates to recover the cut material head of the second material belt 1102. Fig.11 As shown in state E, the first pressing member and the second pressing member are controlled to move away from each other, and the second main roller 1130 is controlled to rotate to at least partially pull the second material strip 1102 with the cut-off material head back from the second cutting and splicing assembly, so as to better splice this part of the second material strip with the first material strip. Fig.11 As shown in state F and state G, the spliced ​​second material strip 1102 can continue to be exported through the output roller 1110, and the first pressing member and the second pressing member move further away from each other. In this way, the cutting and splicing of the working material strip and the spare material strip can be completed without stopping the equipment. This improves the continuity of production. In the scenario of battery production, the coating efficiency of the blue film and the production efficiency of the battery can be improved.

[0134] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A cutting and splicing device for a material strip, characterized in that: include: A first cutting and splicing assembly, the first cutting and splicing assembly comprising a first cutting knife, a second cutting knife and a first pressing member arranged between the first cutting knife and the second cutting knife; and a second cutting and splicing assembly, the second cutting and splicing assembly comprising a third cutter, a fourth cutter, and a second pressing member disposed between the third cutter and the fourth cutter and facing the first pressing member, The first pressing member and the second pressing member are movable toward each other to press against the first material strip and the second material strip located between the first pressing member and the second pressing member to obtain a spliced ​​material strip, and The first cutter and the fourth cutter are used to cut off the head of the first material strip and the tail of the second material strip respectively, and the second cutter and the third cutter are used to cut off the tail of the first material strip and the head of the second material strip respectively.

2. The cutting and splicing device according to claim 1, characterized in that: The first cutter and the second cutter are movably arranged in the first cutting and splicing assembly to cut the first material strip, and the third cutter and the fourth cutter are movably arranged in the second cutting and splicing assembly to cut the second material strip.

3. The cutting and splicing device according to claim 2, characterized in that: The first cutting and splicing assembly includes a first guide rail, a second guide rail, a first driver and a second driver, the first driver is used to drive the first cutter to move along the first guide rail, and the second driver is used to drive the second cutter to move along the second guide rail; and wherein, the second cutting and splicing assembly includes a third guide rail, a fourth guide rail, a third driver and a fourth driver, the third driver is used to drive the third cutter to move along the third guide rail, and the fourth driver is used to drive the fourth cutter to move along the fourth guide rail.

4. The cutting and splicing device according to any one of claims 1 to 3, characterized in that: The first cutting and splicing assembly also includes a first material tape contact roller arranged between the first pressing member and the first cutting knife, and a second material tape contact roller arranged between the first pressing member and the second cutting knife; and the second cutting and splicing assembly also includes a third material tape contact roller arranged between the second pressing member and the third cutting knife, and a fourth material tape contact roller arranged between the second pressing member and the fourth cutting knife.

5. The cutting and splicing device according to any one of claims 1 to 4, characterized in that: The cutting and splicing device also includes: A first feed roller set, the first feed roller set comprising: A first main roller for carrying a first material roll to be supplied; and A first material tape passing roller, used for guiding the first material tape from the first material roll to the first cutting and splicing assembly; and A second feed roller set, the second feed roller set comprising: A second main roller for carrying a second material roll to be supplied; and The second material tape passing roller is used for guiding the second material tape from the second material roll to the second cutting and splicing assembly.

6. The cutting and splicing device according to claim 5, characterized in that: The first main roller is rotatable to at least partially pull the first material strip back from the first cutting and splicing assembly; and wherein the second main roller is rotatable to at least partially pull the second material strip back from the second cutting and splicing assembly.

7. The cutting and splicing device according to claim 6, characterized in that: The first abutment and the second abutment are movable away from each other.

8. The cutting and splicing device according to claim 5, characterized in that: The first feed roller group further includes a first release paper recovery roller for pulling out the first release paper from the first material roll, and the first material strip passing roller is configured to guide the first material strip separated from the first release paper to the first cutting and splicing assembly; and The second feed roller group includes a second release paper recovery roller for pulling out the second release paper from the second material roll, and the second material tape passing roller is configured to guide the second material tape from which the second release paper is separated to the second cutting and splicing assembly.

9. The cutting and splicing device according to claim 8, characterized in that: The first feed roller group further includes a first release paper recovery buffer roller, which is disposed between the first main roller and the first release paper recovery roller and is used to buffer the movement of the first release paper during the period when the first release paper recovery roller pulls the first release paper out from the first material roll; and Wherein, the second feed roller group also includes a second release paper recovery buffer roller, which is arranged between the second main roller and the second release paper recovery roller, and is used to buffer the movement of the second release paper during the period when the second release paper recovery roller pulls the second release paper out from the second material roll.

10. The cutting and splicing device according to any one of claims 1 to 9, characterized in that: The cutting and splicing device further comprises a first residual material receiving roller and a second residual material receiving roller, wherein the first residual material receiving roller is used to recover the material head of the cut first material strip, and the second residual material receiving roller is used to recover the material head of the cut second material strip.

11. The cutting and splicing device according to any one of claims 1 to 9, characterized in that: The cutting and splicing device further includes a fifth guide rail and a fifth driver, wherein the fifth driver is used to drive the first cutting and splicing assembly and the second cutting and splicing assembly to move toward or away from each other along the fifth guide rail.

12. The cutting and splicing device according to claim 5, characterized in that: The cutting and splicing device further comprises a deviation correction mechanism, which is mechanically connected to at least one of the first feed roller group and the second feed roller group and is used to compensate for the deviation of the first feed roller group or the second feed roller group during feeding.

13. A coating system for processing a battery cell, characterized in that: include: The cutting and splicing device according to any one of claims 1 to 12; and A coating device is used to coat the diaphragm received from the cutting and splicing device on the surface of the battery cell.

14. A method for cutting and splicing a material strip using a cutting and splicing device, characterized in that: The cutting and splicing device comprises: a first cutting and splicing assembly, the first cutting and splicing assembly comprising a first cutting knife, a second cutting knife, and a first pressing member disposed between the first cutting knife and the second cutting knife; and a second cutting and splicing assembly, the second cutting and splicing assembly comprising a third cutter, a fourth cutter, and a second pressing member disposed between the third cutter and the fourth cutter and facing the first pressing member, and Wherein, the method comprises: Providing a first material strip and a second material strip; controlling the first pressing member and the second pressing member to move toward each other to press the first material strip and the second material strip located between the first pressing member and the second pressing member to obtain a spliced ​​material strip; and The first cutter and the fourth cutter are controlled to cut off the head of the first material strip and the tail of the second material strip respectively, or the second cutter and the third cutter are controlled to cut off the tail of the first material strip and the head of the second material strip respectively.

15. The method according to claim 14, characterized in that The cutting and splicing device also includes: A first main roller, for carrying a first material roll including the first material strip; and a second main roller for carrying a second material roll including the second material strip, and Wherein, the method further comprises: controlling the first pressing member and the second pressing member to move away from each other; and The first main roller is controlled to rotate to at least partially pull the first material strip with the cut-off head back from the first cutting and splicing assembly, or the second main roller is controlled to rotate to at least partially pull the second material strip with the cut-off head back from the second cutting and splicing assembly.

16. The method according to claim 14, characterized in that The cutting and splicing device further comprises a first waste material receiving roller and a second waste material receiving roller, and Wherein, the method further comprises: The first remnant material receiving roller is controlled to rotate to recover the cut ends of the first material strip, or the second remnant material receiving roller is controlled to rotate to recover the cut ends of the second material strip.

17. The method according to any one of claims 14 to 16, characterized in that Providing the first material strip and the second material strip includes: providing a first material strip from which a first release paper is separated; and A second material strip from which the second release paper is separated is provided.

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