Device and method for connecting limited material webs
By designing a material web connection device for energy single pool production, the fast and automated connection of material webs is achieved using negative pressure holding and cutting technology, and the problem of insufficient connection speed and quality in the prior art is solved, and production efficiency and product quality are improved.
Patent Information
- Application Number
- CN202380057330.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-08-01
- Filing Date
- 2023-07-25
- Publication Date
- 2025-03-14
AI Technical Summary
In energy single pool production, the connection of material formats requires rapid and high quality to ensure continuous production and reduce production costs, but the prior art is difficult to effectively solve this problem.
A device is designed, which includes a holding device, a reverse element, a cutting element, an applicator, a punch and a cutting device to maintain the new material web by negative pressure, cut and connect the material web, and achieve high quality connection using adhesive tape.
It realizes rapid and automated connections between used up and new material formats, reduces production interruption time, improves the speed and efficiency of energy single pool production, and avoids failures caused by material overlap.
Smart Images
Figure CN119630599A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a device for connecting limited material widths for the energy cell production industry and a method for connecting limited material widths for the energy cell production industry. Background Art
[0002] Energy cells or also energy storage devices within the meaning of the present invention are used, for example, in motor vehicles, other land vehicles, ships, aircraft, or also in stationary devices such as in the form of battery cells or fuel cells, where extremely large amounts of energy must be stored over a longer period of time. For this purpose, such energy cells have a structure consisting of stacked layer materials, which usually consist of an anode material on a conductor foil and a cathode material on a conductor foil and a separator foil, wherein the separator foil is arranged between the anode material and the cathode material. Such a material composite can be present in the energy cell in a stacked, rolled or folded arrangement.
[0003] For high production speeds, the materials for anodes, cathodes and separators are processed into material webs as much as possible. In this case, the material webs (which can be, for example, semi-finished products or intermediate products) are usually delivered as reels or rolls or transported in this form between different devices. Reels inevitably have limited reel lengths. For the highest possible productivity and therefore also for low production costs, it is advantageous to use continuous webs for continuous production at high speeds, so that each exhausted material web is connected to a new material web. In order to ensure continuous production, process memories or also buffer memories are known, which represent a buffer so that a connection between two material webs can be established to achieve a continuous web, while using the material web from the buffer memory to run other production processes. However, when producing energy cells (such as lithium-ion batteries), the increased production speed cannot be compensated by an increasingly larger buffer memory, so that the connection process must be carried out as quickly as possible.
[0004] Furthermore, the joining point between two material webs in a continuous web can cause problems in the further process sequence, so the joining point should deviate as little as possible from the rest of the material web. Summary of the invention
[0005] It is therefore an object of the present invention to provide a device and a method which allow material webs to be connected to form a continuous web as quickly and efficiently as possible.
[0006] This object is achieved by the features of the independent claim. Further preferred embodiments of the invention can be derived from the dependent claims, the drawings and the associated description.
[0007] A device for connecting limited material webs for the energy cell production industry is proposed, wherein the exhausted material web can be guided in a first guide section and the new material web can be guided in a second guide section. The exhausted material web and the new material web can be conveyed in a conveying direction. The device comprises a holding device, which is configured to hold the new material web in the second guide section by negative pressure. In addition, the device comprises a reversing element and a cutting element located behind the holding device in the conveying direction, wherein the reversing element and the cutting element are configured to cut the stationary new material web, thereby producing a new web beginning of the new material web. In addition, the device comprises: an applicator for applying an adhesive tape to the new web beginning of the new material web; and a punch and a cutting device. The cutting device is configured to cut the stationary exhausted material web, thereby producing a new web end of the exhausted material web. The punch is provided for pressing the web end of the used material web against the adhesive tape and against the applicator in order to connect a new web start of a new material web with the new web end of the used material web.
[0008] The proposed device makes it possible to quickly produce a high-quality connection between an exhausted material web and a new material web, so that only minimal interruptions to the production process are required.
[0009] The device preferably has a buffer store or process store for the exhausted material web.
[0010] Due to the brief interruption of the conveyance of the continuous material web when establishing the connection, the buffer store can be designed to be smaller and / or the conveyance speed of the continuous material web and thus also the production speed for producing the energy cells can be increased.
[0011] The proposed device is suitable for producing so-called static splices, in which the conveying speed is reduced to zero during the production of the connection by the adhesive tape.
[0012] Furthermore, the device enables a butt connection of a used material web with a new material web, so that the two material webs do not overlap at the connection point. Thus, by avoiding a doubling of the material thickness due to the overlapping of the material webs, faults can be prevented during the further production of the energy cell. In this respect, the amount of material applied by the adhesive tape is relatively small. The device is particularly suitable for relatively thick material webs of energy cells, for example conductor foils coated with anode material or cathode material.
[0013] The adhesive tape is preferably adhered to the uncoated side of the conductor foil coated with the anode material or cathode material.In addition, the used-up material web and the new material web are guided in parallel to a great extent in the first and second guide sections before being connected.
[0014] In an advantageous embodiment, the applicator receives the adhesive tape from the supply unit. In addition, the applicator is preferably pivotable or arranged at a pivot element. The adhesive tape can be removed from the supply unit at the applicator, for example by negative pressure, and is retained until it is applied to a new web start of a new material web and, if necessary, also until it is applied to a new web end of a used material web.
[0015] The new web end of the exhausted material web is the end of the exhausted material web, which is further conveyed in the conveying direction in the device and is connected to the new web beginning of the new material web. The original end of the exhausted material web is usually assigned to a reel, on which the remainder of the material web remains until the exhausted material web is cut off. The reel with the remaining portion of the exhausted material web can then be removed. Accordingly, after the exhausted material web is connected to the new material web, the new material web becomes the exhausted material web, so that a continuous material web can be produced in the device.
[0016] In a preferred embodiment, the counter element is movable so as to come into contact with the new material web. Preferably, the counter element is pivoted, for example, from the rear wall of the device into the plane of the guide section of the new material web. This makes it easier, in particular, to lay or prepare the new material web. Furthermore, unnecessary collisions can be avoided in this way. Preferably, the counter element is provided for coming into contact with the new material web on the opposite side of the holding device.
[0017] Preferably, the counter element is arranged or can be arranged between the exhausted material web and the new material web. Therefore, the counter element is preferably movable between the first guide section of the exhausted material web and the second guide section of the new material web, or is fixedly arranged therein.
[0018] In a possible alternative embodiment, the cutting element is arranged between the second guide section of the new material web and the first guide section of the exhausted material web or is movable and / or pivotable into such an arrangement. In this possible alternative embodiment, the counter element is arranged on the other side of the new material web.
[0019] According to one development, it is proposed that the counter element is provided as a counter for an applicator for applying the adhesive tape at a new web beginning of a new material web.
[0020] Thus, in a possible embodiment, the counter element can be used as a counter holder for applying the adhesive tape to the new material web in addition to its function as a counter holder for cutting the new material web. By integrating two functions, the device can remain relatively simple.
[0021] According to another development, it is proposed that the counter element and the cutting device are arranged for cutting the exhausted material web. Thus, in an advantageous embodiment, the counter element can assume a further function, wherein the cutting of the exhausted material web is preferably carried out by the cutting device against another edge of the counter element than the cutting of the new material web by the cutting element. However, in a possible embodiment, the two cuts can be carried out at different edges of the same face of the counter element.
[0022] Preferably, the punch and the cutting device are firmly connected to each other or the cutting device is arranged at the punch so that the punch moves together with the cutting device. Further preferably, the punch and the cutting device can be axially moved in the direction of the used material web. In a preferred embodiment, when the punch and the cutting device are axially moved, the punch contacts the used material web before the cutting device, and the cutting device can be designed in the form of a tool, for example. Therefore, preferably, the punch has a protrusion relative to the cutting device. It is particularly advantageous to set a spacing between the punch and the cutting device. In addition, it is preferred to arrange the punch before the cutting device in the conveying direction.
[0023] According to a preferred embodiment, it is provided that the exhausted material web is guided on two rollers in the first guide section and / or the new material web is guided on two rollers in the second guide section.
[0024] Preferably, the new material web and the used material web can be guided parallely in the section.
[0025] According to one refinement, it is proposed that a pretensioning unit is provided for rolling up and tensioning the web start of the new material web. Thus, the new material web can be tensioned in the second guide section, in particular between the rollers, to such an extent that good guidance and clear positioning of the new material web in the second guide section can be achieved. This improves in particular the cutting quality of the cutting performed by the cutting element against the counter element.
[0026] According to another improvement, it is proposed to set a scroll opener The reel opener is provided for receiving a web start of a new material web from the reel, guiding the web start via the second guide section and transferring it to the pretensioning element.
[0027] A high degree of automation can thereby be achieved, so that during these preparation steps the conveying speed of the exhausted material web does not have to be reduced or even stopped. The reel opener is preferably pivotable or arranged on a pivot element and preferably has the same axis of rotation as the applicator.
[0028] The web start of the new material web usually corresponds to the outer end of the new material web on the reel. The new material web is cut in the device so that a new web start is created. Therefore, the section that abuts against the lead section (which has the original web start of the new material web) is not transported in the transport direction and forms a residue.
[0029] In order to achieve this object, a method is also proposed for connecting limited material widths for the energy cell production industry using a device according to any one of claims 1 to 9, the method comprising the following steps:
[0030] - conveying the exhausted material web in the conveying direction in the first guide section;
[0031] - holding the new material web in the second guide section by means of negative pressure via a holding device;
[0032] - cutting the new material web behind the holding device in the conveying direction by means of a reversing element and a cutting element and generating a new web start of the new material web;
[0033] - applying the adhesive tape to the new web beginning of the new material web by means of an applicator;
[0034] - the used material web comes to a stop in the first guide section;
[0035] - cutting the used material web by means of a cutting device and producing a new web end of the used material web;
[0036] - pressing the web end of the used material web against the adhesive tape and against the applicator by means of a punch and connecting a new web beginning of a new material web to the new web end of the used material web;
[0037] -Convey new material formats.
[0038] The proposed method enables rapid and automated joining of two limited material webs for producing energy cells, in particular battery cells.
[0039] According to another improvement, the following steps are proposed before the new material web is held by the holding device:
[0040] - Grab the beginning of a new web of material from the reel;
[0041] - guiding the new material web via the second guide section;
[0042] The web start of the new material web is transferred to the pretensioning unit and the new material web is tensioned in the second guide section.
[0043] As a result, after a new reel with a new material web has been placed, the entire joining process can be automated. BRIEF DESCRIPTION OF THE DRAWINGS
[0044] The present invention will be explained below with reference to the accompanying drawings using preferred embodiments.
[0045] Figure 1-Figure 5 The device for connecting limited material webs is shown in different operating states before connecting the material webs;
[0046] Figure 6 The two material webs connected by an adhesive tape are shown from the front;
[0047] Figure 7 The two material webs connected by an adhesive tape are shown from the rear side;
[0048] Figure 8-Figure 13 A detailed view of a device for connecting two material webs is shown in different operating states during the connection. DETAILED DESCRIPTION
[0049] exist Figures 1 to 5 1 shows a device 10 for connecting limited material webs 11, 12 for the production of energy cells, in particular battery cells. The material web 11 is unwound from a reel 30 and supplied in an unwound state to further production steps via a first guide section 13 through a buffer store 27 for the material web 11. The material web 11 is supplied from the reel 30 so that the material web 11 is a limited material web 11. Furthermore, the material web 11 supplied to the buffer store 27 or to further process steps for producing energy cells is a spent material web 11. In order to produce continuous material webs 11, 12, the spent material webs 11 are connected to new material webs 12 by the device 10 in each case. The new material web 12 is fed from a new reel 30, which is placed on a turntable 32 of the device 10 together with the reel 30 of the spent material web 12. The exhausted material web 11 is conveyed via a first guide section 13 in the conveying direction 15 to a buffer store 27, which in this exemplary embodiment is formed by two rollers 25. The buffer store 27 allows the exhausted material web 11 to be stopped briefly in the region of the first guide section 13 and at the same time makes it continuously available for the subsequent process for producing energy cells.
[0050] Figure 1 The device 10 is shown in an operating state in which a new reel 30 with a new material web 12 is placed on a turntable 32. The applicator 21 designed as a pivoting arm is first moved into a receiving position opposite a supply unit 33 for the adhesive tape 22.
[0051] exist Figure 2 , the applicator 21 is displaced to the providing unit 33, whereby the adhesive tape 22 for connecting the used material web 11 with the new material web 12 can be received by the applicator 22, which adhesive tape can be fixed, for example, by negative pressure. The applicator 21 with the adhesive tape 22 can then be used to connect the used material web 11 with the new material web 12 in the waiting position, see Figure 3 .
[0052] Figure 4 and Figure 5 Further preparatory steps are shown for connecting the exhausted material web 11 with the new material web 12. In this advantageous embodiment, the reel opener 29 has a common axis of rotation with the applicator 21, which for this purpose opens the reel 30 with the new material web 12. Figure 4 The reel opener 29 grabs the web start 31 of the new material web 12 and guides the new material web 12 via the second guide section 14 to the pretensioning unit 28, which in this advantageous embodiment is formed by two rollers 26. The pretensioning unit 28 serves to tension the new material web 12 so that it rests on the rollers 26 in a defined and tensioned manner in the second guide section 13, see Figure 5 Furthermore, by means of the pretensioning unit 28 , for example, a first layer of packaging paper or, in general, a reel 30 can be rolled up and removed.
[0053] exist Figures 1 to 5 During the steps shown in and the operating state of the device 10 , the exhausted material web 11 can also be fed to the buffer store 27 .
[0054] exist Figure 6 and Figure 7, the connection of the used material web 11 to the new material web 12 produced by the device 10 is shown in a detailed view of the front and rear sides of the material webs 11, 12. The used material web 11 is connected to the new material web 12 in a butt-jointed manner, i.e. without overlapping. The adhesive tape 22 is bonded both to the used material web 11 and to the new material web 12 and thus connects the material webs 11, 12, whereby a continuous material web 11, 12 can be produced. The connection to the used material web 12 is carried out at the new web end 19, which does not correspond to the original web end of the used material web 11 on the reel 30. Furthermore, the connection to the new material web 12 takes place at the new web beginning 20, which does not correspond to the original web beginning 31 on the reel 30 with the new material web 12, which is achieved by means of further Figures 8 to 13 To explain, Figures 8 to 13 The connection process using the device 10 is shown in a detailed view of the device 10 .
[0055] Figure 8 Shown in accordance with Figures 1 to 5 The device 10 in the state after preparation. Accordingly, the used material web 11 can also be conveyed in the conveying direction 15. The holding device 16 in the second guide section 14 is in contact with the new material web 12 and holds it by negative pressure. In this advantageous embodiment, the counter element 17 and the cutting element 18 are deployed from the rear wall of the device 10 behind the holding device 16 in the conveying direction 15. In this embodiment, the counter element 17 is placed on the new material web 12 on the other side of the new material web 12 than the holding device 16. The cutting element 18 is arranged on the same side of the new material web 12 as the holding device 16. The cutting element 18 interacts with the counter element 17 to separate the new material web 12, thereby forming a new web beginning 20 of the new material web 12. The cut front of the new material web 12 can be rolled up by the pretensioning unit 28 and then removed. The new web start 20 is held in place by the holding device 16 , and in this advantageous embodiment the cutting element 18 is folded back into the rear wall of the device 10 .
[0056] As in Fig. 9As can be seen in the figure, the counter element 17 initially remains in place, in contrast to the cutting element 18. The applicator 21, at which the adhesive tape 22 is held, applies a portion of the adhesive tape 22 to the new material web 12 at the new web beginning 20, wherein the counter element 17 serves as a counter support for the applicator 21 for pressing the adhesive tape 22 onto the new material web 12. Another portion of the adhesive tape 22 is exposed with the adhesive side behind the new web beginning 20 of the new material web 12 in the conveying direction 15. The non-adhesive rear side is preferably still held by the applicator 21.
[0057] exist Fig.10 , the device 10 is shown during a connecting process in which the spent material web 11 has come to a standstill and is stationary. Accordingly, subsequent processes for producing energy cells can be supplied from the buffer store 27. The spent material web 11 is deflected in the first guide section by the punch 23 in the direction of the new material web 12. The punch 23 is arranged behind the reversing element 17 in the conveying direction 15. The punch 23 is provided with a cutting device 24, which is arranged between the punch 23 and the reversing element 17 relative to the conveying direction 15. The cutting device 24 is arranged rearwardly relative to the punch 23, so that when the spent material web 11 is displaced, only the punch 23 comes into contact with the spent material web 11 at first. As the displacement proceeds, the spent material web 11, as in Fig.11 As can be seen in FIG. 2 , it contacts the counter element 17. When the punch 23 with the cutting device 24 moves further, the cutting device 24 cooperates with the counter element 17 to separate the exhausted material web 12 and form a new web end 19.
[0058] exist Fig.12 2 shows how the punch 23 presses the new web end 19 onto the free part of the adhesive tape 22 after the separation process, wherein the applicator 22 supports the rear side of the adhesive tape 22. The used material web 11 is connected to the new material web 12 via the adhesive tape 22.
[0059] Fig.13The device 10 is shown in a subsequent step. The punch 23 and the cutting device 24 are pulled back into the starting position again, and the counter element 17 is folded back into the rear wall of the device 10 again. The applicator 21 is separated from the adhesive tape 22 and moved back. The holding device 16 is not subjected to negative pressure. In addition, the remaining part of the exhausted material web 11 is rolled back onto the reel 30. Accordingly, the connected material webs 11, 12 can be conveyed again in the conveying direction 15 at the process speed. The connected material webs 11, 12 can continue to be conveyed in the conveying direction at an excessive speed temporarily in order to fill the buffer store 27 again. In addition, the turntable 32 with the reel 30 can also be rotated in such a way that the new connected material web 12 takes over the route of the exhausted material web 11 and is guided on the roller 26 in the first guide section.
[0060] Reference Symbols List:
[0061] 10 Installation
[0062] 11 exhausted material web 12 new material web 13 first guide section 14 second guide section 15 conveying direction
[0063] 16. Holding device
[0064] 17 Reverse element
[0065] 18 cutting elements
[0066] 19 New web end 20 New web start 21 Applicator
[0067] 22 Adhesive tape
[0068] 23 Punch
[0069] 24 cutting device
[0070] 25 rollers
[0071] 26 rollers
[0072] 27 Buffer memory
[0073] 28 pre-tensioning unit
[0074] 29 scroll opener
[0075] 30 scrolls
[0076] 31 frame start end 32 turntable 33 providing unit.
Claims
1. A device (10) for connecting limited material widths (11, 12) for the energy cell production industry, wherein The exhausted material web (11) can be guided in the first guide section (13) and the new material web (12) can be guided in the second guide section (14), wherein - used material webs (11) and new material webs (12) can be conveyed in a conveying direction (15), and the device (10) comprises: a holding device (16) which is provided for holding the new material web (12) in the second guide section (14) by means of negative pressure, a reversing element (17) and a cutting element (18) located behind the holding device (16) in the conveying direction (15), wherein the reversing element (17) and the cutting element (18) are provided for cutting the stationary new material web (12) so as to produce a new web beginning (20) of the new material web (12), an applicator (21) for applying an adhesive tape (22) to a new web beginning (20) of a new material web (12), and a punch (23) and a cutting device (24), wherein the cutting device (24) is provided for cutting the stationary exhausted material web (11) so as to produce a new web end (19) of the exhausted material web (11), and wherein - The punch (23) is provided for pressing the web end (19) of the used material web (11) against the adhesive tape (22) and against the applicator (21) in order to connect a new web beginning (20) of a new material web (12) to the new web end (19) of the used material web (11).
2. The device (10) according to claim 1, characterized in that The counter element (17) can be moved to come into contact with the new material web (12).
3. The device (10) according to claim 1 or 2, characterized in that The counter element (17) is arranged or can be arranged between the exhausted material web (11) and the new material web (12).
4. The device (10) according to any one of the preceding claims, characterized in that The counter element (17) is provided as a support for an applicator (21) for applying an adhesive tape (22) to a new web beginning (20) of a new material web (12).
5. The device (10) according to any one of the preceding claims, characterized in that The reversing element (17) and the cutting device (24) are provided for cutting the exhausted material web (11).
6. The device (10) according to any one of the preceding claims, characterized in that The exhausted material web (11) is guided in a first guide section (13) over two rollers (25) and / or the new material web (12) is guided in a second guide section (14) over two rollers (26).
7. The device (10) according to any one of the preceding claims, characterized in that A buffer store (27) is provided for the exhausted material web (11).
8. The device (10) according to any one of the preceding claims, characterized in that A pretensioning unit (28) is provided for rolling up and tensioning a web start (31) of a new material web (12).
9. The device (10) according to any one of the preceding claims, characterized in that A reel opener (29) is provided, which is designed to receive a web start (31) of a new material web (12) from a reel (30), guide the web start (31) via a second guide section (14) and transfer it to a pretensioning element (28).
10. A method for connecting limited material widths for the energy cell production industry using a device (10) according to any of the preceding claims, It is characterized by the following steps: - conveying the used material web (11) in a first guide section (13) along a conveying direction (15); - holding the new material web (12) in the second guide section (14) by means of negative pressure via a holding device (16); - cutting the new material web (12) behind the holding device (16) in the conveying direction (15) by means of a reversing element (17) and a cutting element (18) and producing a new web beginning (20) of the new material web (12); - applying the adhesive tape (22) to the new web beginning (20) of the new material web (12) by means of an applicator (21); - the used material web (11) comes to a stop in the first guide section (13); - cutting the used material web (11) by means of a cutting device (24) and producing a new web end (20) of the used material web (11); - pressing the web end (19) of the used material web (11) against the adhesive tape (22) and against the applicator (21) by means of a punch (23) and connecting a new web start (20) of a new material web (12) to the new web end (19) of the used material web (11); - Delivery of a new material web (12).
11. The method according to claim 10, characterized in that The following steps are performed before the new material web (12) is held by the holding device: - Grasping the web beginning (31) of a new material web (12) from the reel (30); - guiding the new material web (12) via a second guide section (14); - The web start (31) of the new material web (12) is transferred to the pretensioning unit (28) and the new material web (12) is tensioned in the second guide section (14).