Device and method for connecting material web for producing energy cells
By designing a device for energy single pool manufacturing, the device uses swingable or rotatable pressing elements and a weakening device to achieve dynamic connection of the material web, solving the problem of material web connection speed and space requirements, and achieving an efficient and continuous production process.
Patent Information
- Application Number
- CN202380071120.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-10-04
- Filing Date
- 2023-09-19
- Publication Date
- 2025-05-16
AI Technical Summary
Fast and efficient connection of material formats is a challenge when manufacturing energy single pools, especially when dynamic connections are required and equipment space requirements are reduced.
A device is designed which comprises two swingable or rotatable pressing elements for extruding and connecting the terminated material web with the new material web in the connecting section. The device further comprises a weakening means to generate a weakening line in the material web and to achieve a dynamic connection of the material web by an imprinting connection or an adhesive connection.
It realizes fast and effective connection of material formats, avoids the use of buffer storage, thereby reducing the space requirements and production costs of equipment, while ensuring the continuity of production.
Smart Images
Figure CN120019013A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a device for connecting material webs, in particular membranes, for producing energy cells according to the preamble of claim 1 and to a corresponding method according to the preamble of claim 14 . Background Art
[0002] Energy cells or energy storage devices in the sense of the present invention are used in motor vehicles, other land vehicles, ships, aircraft or also in stationary devices, for example in the form of battery cells or fuel cells, in which a large amount of energy can be stored for a long period of time. For this purpose, such energy cells have a structure consisting of materials stacked on top of each other, which usually consist of an anode material on a conductive film and a cathode material on a conductive film and a separator, wherein the separator is arranged between the anode material and the cathode material. Such a material composite can be located in an energy cell in a stacked, wound or folded arrangement.
[0003] For high production speeds, the materials for anodes, cathodes and separators should be processed into material webs as much as possible. Here, the material webs are usually supplied as rolls or coils or transported in this form between different devices, which material webs can be, for example, semi-finished products or intermediate products. The rolls must have a limited web length. For the highest possible production rate and thus also for low production costs, it is advantageous to carry out continuous production with a continuous web at a high speed, so that the terminated material web is always connected to a new material web. In order to ensure continuous production, process storage or also known buffer storage representing a buffer is known, so that when the further production process is run with the material web from the buffer storage, a connection between two material webs can be established to obtain a continuous web. However, when manufacturing energy cells, such as lithium-ion batteries, the increased production speed cannot be compensated by an increasingly large buffer storage, so that during the transportation, the connection process should be carried out as dynamically as possible, for example at the production speed, so that the buffer storage can be designed as small as possible or the buffer storage can be completely abandoned. The omission of a buffer store reduces the space requirement of the device and also offers the potential for cost advantages. Summary of the invention
[0004] It is therefore an object of the present invention to specify a device and a method which allow the fastest possible and most efficient joining of material webs.
[0005] This object is achieved by the features of the independent claim. Further preferred embodiments of the invention can be gathered from the dependent claims, the drawings and the associated description.
[0006] A device for connecting material webs, in particular diaphragms, for manufacturing energy cells is proposed, wherein the terminated material web can be connected to a new material web. The terminated material web and the new material web can be guided at a distance from each other in a connection section, preferably superimposed at a distance from each other. Two swingable or rotatable pressing elements with pressing surfaces are provided, which are set up to press the terminated and new material webs toward each other in the connection section and connect the terminated and new material webs to each other. The pressing elements are set up to connect the material webs during movement in the conveying direction of the terminated and new material webs, and the device is set up to generate weakening lines, preferably perforation lines, in the terminated and new material webs respectively and to separate the material webs at the weakening lines, preferably perforation lines, respectively by applying increased tensile stress in the material webs.
[0007] The material webs have a spacing relative to one another before being connected. The new and the ending material webs are preferably guided in parallel. Furthermore, preferably, the respective edges of the new and the ending material web are located in the connecting section in a plane perpendicular to the plane of the surface of at least one of the material webs. Furthermore, the material webs are preferably superimposed with their planes or their bases, wherein the material webs are guided at a distance relative to one another. "Superposition" in this respect relates to the orientation of the material webs relative to one another in the connecting section of the device. Before, during and / or after the connection, the material webs are guided in the connecting section. The material webs are preferably guided in the connecting section respectively via two rollers.
[0008] The device is preferably designed to convey the new and the ending material web at the same conveying speed by pressing them against each other by means of a pressing element at least immediately before and / or during the connection of the material webs, so that there is no relative speed of the material webs relative to the process speed for the subsequent process during the connection process. The connection is carried out in the overlapping area of the two material webs, on which the pressing element acts, so that the connection is formed by overlapping. The pressing element preferably moves the new and the ending material web toward each other, so that the spacing between the material webs is eliminated and the material webs are pressed toward each other or relative to each other. When moving the direction of at least one material web and when pressing the two material webs, the rotatable pressing element preferably also has a speed that matches and is synchronized with the speed of the new and the ending material web. As a result, a dynamic connection or dynamic connection of the new material web with the ending material web can be established by overlapping during the running conveying.
[0009] The pressing element preferably has the process speed or conveying speed of the material web at the moment of pressing or connecting to each other, in particular the process speed or conveying speed of the material web with a termination along the conveying direction. Preferably, no slip occurs between the pressing surface and the material web. The pressing element is preferably arranged in the connecting section on both sides of the material web.
[0010] The device is preferably set up to produce a weakening line in the material web before the material webs are pressed toward each other for connection. In addition, the device can preferably be set up to produce a weakening line during the pressing of the material webs toward each other, in particular by the pressing element itself.
[0011] The line of weakness in the ending material web is located behind the connection or a subsequent connection of the material webs, counter to the conveying direction, and the line of weakness in the new material web is located before the connection or a subsequent connection of the material webs, in the conveying direction.
[0012] The proposed device is particularly suitable for separating webs or separators of energy cells, in particular battery cells, since the separators are relatively thin and the absolute elevation in the overlapping region of the connection is small, for example in comparison with coated electrode webs.
[0013] According to a development, it is proposed that the pressing surface of the pressing element is an embossing surface and that the pressing element is designed to produce an embossing connection when the ending and new material webs are pressed against each other.
[0014] The embossing connection enables the connection of material webs without additional joining elements and also without temperature changes. The embossing connection is particularly suitable for diaphragms of energy cells, in particular battery cells, since the diaphragms are generally a uniform material web compared to the coated electrode web. For this purpose, the embossing surface of the pressing element has a corresponding surface configuration, in particular the embossing surfaces of the pressing element preferably have embossing surfaces that correspond to one another. The pressing element can also be referred to as a embossing element in a possible embodiment.
[0015] In an advantageous embodiment, for example, a pressing element having an embossing surface is designed to produce a weakening line in the new material web and in each case in the ending material web.
[0016] In a possible embodiment, the line of weakness can also be located at the transition of the embossed connecting section to the non-embossed section of the material web.
[0017] In an alternative embodiment, it is proposed that the device has a bonding sheet holder, which is designed to hold a bonding sheet bonded on both sides between the ending and new material webs, wherein a pressing element is designed to establish a bonding connection between the material web and the bonding sheet when the ending and new material webs are pressed toward each other.
[0018] Thus, a dynamic connection or dynamic joining of the new material web to the ending web can also be established. The adhesive connection can be established with high connection strength by means of a pressure element which first moves the two material webs toward the adhesive sheet and then presses the material webs onto the adhesive sheet from both sides.
[0019] In other possible embodiments, the proposed device can also be used to produce a sealed connection of the material webs by a combination of an adhesive connection and an embossed connection.
[0020] Furthermore, it is proposed that the device is designed to increase the tensile stress in the new material web and / or in the final material web during the production of the embossing and / or adhesive bond in order to separate the material webs by the respectively increased tensile stress.
[0021] This allows a targeted separation at the weakening line or perforation line, which is also achieved in time in the process by controlling the tensile stress when the material webs are pressed towards each other. Due to the temporary increase in tensile stress, the corresponding material webs tear apart at the weakening line. The tearing of the material webs preferably takes place when they are pressed towards each other, which fixes the material webs relatively at the current conveying speed, so that a particularly targeted construction of tensile stress can be carried out in the section with the weakening line. In the conveying direction starting from the connection point, for example, the conveying speed of the new material web can be increased in order to increase the tensile stress. In the conveying direction opposite to the connection point, for example, the conveying speed of the terminating material web can be reduced in order to increase the tensile stress.
[0022] According to an improved solution, the device is configured to: generate increased tensile stress in the terminating material web between the weakening line and the reel with the terminating material web in order to separate the terminating material web; and generate increased tensile stress in the new material web between the weakening line and the overwinder with the new material web in order to separate the new material web.
[0023] The reel with the finished material web can be run, for example, at a circumferential speed lower than the process speed at the moment of pressing or connecting together by the hold-down element, thereby separating the rest of the finished material web or also the tail. The headwinder can be operated at a speed higher than the process speed or than the conveying speed of the finished material web in the conveying direction of the connection at the moment of pressing or connecting together, in order to achieve a corresponding increase in the tensile stress and to achieve separation at the line of weakness.
[0024] Furthermore, it is proposed that the pressing elements each have a curved, in particular a singly curved, preferably arc-shaped pressing and / or embossing surface which extends over one of the material webs during pressing and / or embossing.
[0025] Thus, a slip-free contact between the pressure element and the material web can be achieved with a uniform movement, whereby the control or regulation of the movement of the pressure element can be simplified and undesirable stress peaks in the material web can be avoided.
[0026] According to a development, it is proposed that a weakening device, preferably a respective weakening device, is provided upstream of the connecting section for the ending material web and / or the new material web, counter to the conveying direction, which is designed to produce a weakening line in the material web.
[0027] The weakening device is preferably arranged in each case between the winding drum of the ending material web and the winding drum of the new material web and the connecting section.
[0028] The weakening device produces weakening lines, such as perforated and / or cut lines and / or squeezed lines, in one or both material webs. The weakening device preferably synchronizes the production of the weakening line in the new material web with the movement of the pressure element in time so that the weakening line of the new material web is located behind the pressure element when the material webs are pressed toward each other by continuous conveying, so that the beginning of the new material web can be separated. For the ending material web, the weakening device preferably synchronizes the production of the weakening line with the movement of the pressure element in time so that the weakening line of the ending material web is located before the pressure element when the material webs are pressed toward each other by continuous conveying, so that the remaining part of the ending material web can be separated.
[0029] Furthermore, it is proposed that the weakening device has a knife roller and a support roller, wherein the support roller is pivotable and is designed to come into contact with the material web during the pivoting, to move the material web and to press it against the knife roller.
[0030] This makes it possible to produce a weakening line as a predetermined breaking point in the material web while the material web is moving at the conveying speed. The support roller moves the course of the material web towards the knife roller, wherein the support roller preferably rolls passively on the material web. The support roller serves as a support for the knife roller, which preferably rolls actively driven on the material web and produces a weakening and / or a perforation at the weakening line with a knife.
[0031] In an advantageous embodiment, the pressing element is designed to produce a weakening line in the ending material web and in the new material web, respectively.
[0032] The weakening line can be produced by a pressing element, in particular by embossing or when producing an embossed connection, for example at the transition from an embossed section to an embossed section. In addition, a knife or an edge can be provided on the pressing element, which produces a weakening of the material in the corresponding material web at the weakening line. In this possible embodiment, for example, an additional weakening device can be omitted.
[0033] Furthermore, it is proposed that the device is designed to produce a weakening line in the new material web along the conveying direction relative to the connection, such as an embossed and / or adhesive connection, and / or to produce a weakening line in the terminal material web counter to the conveying direction relative to the embossed or adhesive connection.
[0034] According to an advantageous development, it is proposed that a pivoting element is provided which is designed to take a new material web from a new reel, guide it through the connecting section and transfer it to the headwinder.
[0035] Thus, a fully automatic joining process of two material webs can be achieved. In addition, the new material web can be accelerated to the process speed by means of the headwinder, so that the joining of the two material webs can be carried out dynamically while being synchronized with the process speed.
[0036] In a further development, it is proposed that the device has a feed device with two roll receptacles for rolls of the material web.
[0037] The roll receiving means for the finished and new rolls of the material web are preferably actively driven. The material web is conveyed by the feed device through the connecting section.
[0038] In a preferred embodiment, the feed device has a carousel feeder, on which the roll receiver is arranged.
[0039] By means of the rotary table feeder, after the material webs have been joined, a new roll receiver with a roll of new material web can be rotated to the position of the finished roll of material web.
[0040] In order to achieve this object, a method is also proposed for connecting industrial material webs for producing energy cells using a device according to any one of claims 1 to 13 .
[0041] According to an improvement, it is proposed that the device has a headwinder with a certain diameter, wherein a portion of the new material web is wound from a roll on a roll receiving device onto the headwinder, wherein the number of rotations of the headwinder and the roll receiving device is detected, and the diameter and / or the circumference of the roll is calculated from the detected number of rotations and from the diameter of the headwinder.
[0042] The proposed diameter calculation can advantageously be used to adjust the conveying speed and / or the timing for the next roll change or for the connection to the next material web. BRIEF DESCRIPTION OF THE DRAWINGS
[0043] The present invention will be explained below with reference to the accompanying drawings according to preferred embodiments.
[0044] Figure 1 An apparatus for connecting a material web to a terminated material web is shown;
[0045] Figure 2 A device for connecting a material web to a new material web on a reel is shown;
[0046] Figure 3 A device for connecting the material webs when opening a new roll is shown;
[0047] Figure 4 A device for connecting a material web to a new material web to be joined is shown;
[0048] Figure 5 A device for connecting a material web to a new material web on a headwinder is shown;
[0049] Figure 6 A device for connecting material webs with deflected support rollers is shown;
[0050] Figure 7 A device for connecting material webs when lines of weakness are produced in the material webs is shown;
[0051] Figure 8 A device for connecting material webs with a pressing element when producing an embossed connection is shown;
[0052] Fig. 9 A device for connecting material webs with a pressing element when separating the material webs is shown;
[0053] Fig.10 A device for connecting a material web to a material web connected by an embossing connection is shown;
[0054] Fig.11 Another apparatus for joining material webs using an adhesive sheet support is shown;
[0055] Fig.12 A device for connecting material webs with a pressing element when producing an adhesive bond is shown;
[0056] Fig.13A device for connecting material webs by adhesive bonding when the material webs are separated is shown;
[0057] Fig.14 A device for connecting a material web to a material web connected by an adhesive connection is shown;
[0058] Fig.15 Another embodiment of a device for joining material webs without a knife roller is shown;
[0059] Fig.16 A device for joining material webs together while producing embossed connections and weakening lines is shown;
[0060] Fig.17 A device for connecting the material webs when they are separated is shown;
[0061] Fig.18 A device for connecting a material web to a connected material web when a knife roller is not present is shown;
[0062] Fig.19 shows material webs connected by an embossed connection; and
[0063] Fig. 20 The material webs are shown connected by an adhesive connection. DETAILED DESCRIPTION
[0064] exist Figure 1 , an advantageous embodiment of a device 10 for connecting an end material web 11, such as a separating web for producing battery cells, to a new material web 12 is schematically shown. The end material web 11 is unwound from a reel 25 on a reel receptacle 34. The end material web 11 is guided over two rollers 37 through a connecting section 13 and is fed to a subsequent process at process speed.
[0065] In order to continuously feed the material webs 11 , 12 to a subsequent process for producing energy cells, in particular battery cells, the final material web 11 is connected to the new material web 12 in the device 10 by means of dynamic joining.
[0066] exist Figure 2 , the device 10 is shown with a new reel 26 having a new material web 12, which is arranged on a reel receptacle 35. In this advantageous embodiment, the two reels 25, 26 are arranged on a rotary feeder 36 with reel receptacles 34, 35, thereby forming a supply mechanism 33.
[0067] Figure 3A further step for preparing to connect the ending material web 11 to the new material web 12 is shown, wherein the pivoting element 32 has a roll opener, with which the roll 26 is opened and the beginning of the material web 12 is gripped. The new material web 12 is then passed through the connecting section 13, in which it is guided parallel to the ending material web 11 by two rollers 37, which Figure 4 . The new material web 12 and the ending material web 11 are thus guided one above the other with their base surfaces aligned relative to one another in the connecting section 13. In this state, the material webs 11, 12 are at a distance relative to one another that is defined by the guidance by the rollers 37. During this time, the ending material web 11 can be conveyed at process speed, while the new material web 12 is stationary or moves at a lower speed to merge into the connecting section 13.
[0068] exist Figure 5 In the process, the pivoting element 32 has already transferred the new material web 12 to the headwinder 27. The headwinder 27 continues to rotate until the new material web 12 is securely wound and fixed on the headwinder 27. Possible packaging material and the head of the new material web 12 can be wound accordingly by the headwinder 27. The preparation for the actual joining process is now complete.
[0069] In this advantageous embodiment, the device 10 has two weakening devices 28, 29, which respectively produce weakening lines 19, 20 or also predetermined breaking lines or predetermined breaking points in the material webs 11, 12. For this purpose, the weakening devices 28, 29 have two deflectable support rollers 31, which are deflected in order to respectively abut against the material webs 11, 12, such as in Figure 6 As a result, the material webs 11 , 12 are respectively moved such that they respectively come into contact with the knife roller 30 . The weakening devices 28 , 29 can be moved out of the rear wall of the device 10 , for example.
[0070] Figures 7 to 10 The joining process is shown with the device 10 in a preferred embodiment. The headwinder 27 accelerates the new material web 12. The weakening device 28 produces perforations at the weakening line 19 with a knife roller 30, which Figure 7 Shown in. Figure 8 A slightly later time is shown, at which the weakening line 19 has already been conveyed past the hold-down elements 15, 17 into the connecting section 13. The winding head unit 27 preferably increases the speed to slightly above the process speed in order to be able to achieve separation at the weakening line 19 due to the increased tensile stress in the new material web 12.
[0071] Another weakening device 29 for the finished material web 11 is provided at Figure 8 In the illustration of , a weakening line 20 has likewise been produced by means of a knife roller 30 , which has been conveyed at process speed into the connecting section 13 between the rollers 37 .
[0072] The pressing elements 15, 17 rotate and accelerate to a speed coordinated with the process speed and press the two material webs 11, 12 toward each other in the connecting section 13. The pressing surfaces of the pressing elements 15, 17, which are in contact with the material webs 11, 12, have embossing surfaces in this advantageous embodiment. Figure 8 At the time shown in FIG. , an embossed connection 21 is established between the two material webs 11 , 12 pressed toward each other, see also FIG. Fig.19 .
[0073] The forewinder 27 is running at a higher speed than the process speed at this moment, thereby increasing the tensile stress in the new material web 11 between the forewinder 27 and the embossed connection 21, which is fixed at this moment at the process speed between the pressing elements 15, 17. This causes the new material web 12 to separate at the weakening line 19 provided for this purpose. The forewinder of the new material web 12 is thus separated from the ending material web 11 before the connection point.
[0074] The roll 25 of the finished material web 11 on the roll receiving portion 34 is decelerated at this moment, so that the finished material web 11 is conveyed at a speed lower than the process speed. As a result, the tensile stress in the finished material web 11 between the roll 25 and the embossed connection 21, which is fixed at this moment at the process speed between the pressure elements 15, 17, is increased to such an extent that the finished material web 11 tears at the weakening line 20. The remaining part of the finished material web 11 can then be wound up. This state of the device 10 for connecting the material webs 11, 12 is Fig. 9 Shown in.
[0075] exist Fig.10 , how the material webs 11, 12 connected by the embossing connection 21 are fed from a new roll 26 on a roll receiving device 35. The ending roll 25 with the remaining part of the material web 11 can be removed and then the new roll 26 with the new material web 12 can be rotated to the position of the ending roll 25 by means of a turntable feeder 36 on which the roll receiving devices 34, 35 are arranged. The new roll 26 with the new material web 12 can thus take the position of the ending roll 25 with the ending web 11 after the connection. In this way, continuous material webs 11, 12, in particular separating webs, can be provided for the production of battery cells using the device 10 without interrupting the feed and preferably without using a process buffer for the material webs 11, 12.
[0076] Figures 11 to 14 Another advantageous embodiment is shown, which is similar to the embodiment in Figures 1 to 6 The preparation steps shown in are contiguous.
[0077] As in Fig.11 , the device 10 has a bonding sheet holder 22, which is designed to place a bonding sheet 23 bonded on both sides in the connecting section 13. The bonding sheet holder 22 is arranged in the connecting section 13 between rollers 37, on which the material webs 11, 12 are guided at a distance from each other.
[0078] exist Fig.12 In the illustration of , the overwinder 27 accelerates the new material web 12. The weakening device 28 produces perforations with a knife roller 30 at the weakening line 19, which has already moved past the pressure elements 15, 17 in the connecting section 13 when the material webs 11, 12 are pressed toward each other.
[0079] The weakening line 20 is produced in the finished material web 11 by a weakening device 29 having a knife roller 30 and a support roller 31, said weakening line being Fig.12 In the illustration, it is located between the connecting section 13 and the weakening device 28 .
[0080] The pressing elements 15, 17 are rotated and accelerated to a speed coordinated with the process speed and press the two material webs 11, 12 toward each other in the connecting section 13, wherein the material webs 11, 12 are moved relative to each other, so that the bonding sheet 23 is pressed onto the material webs 11, 12 between the material webs 11, 12 pressed toward each other and connected via the bonding sheet 23 by an adhesive connection 24.
[0081] exist Fig.13 1 shows a state of the device 10 in which the increased speed compared to the process speed of the forewinder 27 increases the tensile stress in the new material web 11 between the forewinder 27 and the adhesive connection 24, which is fixed at this moment at the process speed between the pressure elements 15, 17. The increased tensile stress in the new material web 12 causes a separation at the weakening line 19.
[0082] The roll 25 with the finished material web 11 is decelerated to a speed below the process speed, which causes an increase in the tensile stress in the finished material web 11 between the roll 25 and the adhesive connection 24, which is fixed at this moment at the process speed between the pressure elements 15, 17. Correspondingly, the finished material web 11 is separated at the weakening line 20.
[0083] Fig.14The feeding of the material webs 11, 12 connected by the adhesive connection 24 from a new roll 26 on a roll receiving device 35 is shown. Subsequently, the new roll 26 with the new material web 12 can be rotated to the position of the final roll 25 by the rotary feeder 36. Thus, after the connection, the new roll 26 with the new material web 12 can take the position of the final roll 25 with the final web 11. With this advantageous embodiment of the device 10, continuous material webs 11, 12, in particular separator webs, can be provided for the production of battery cells without interrupting the conveying and preferably without using a process buffer for the material webs 11, 12.
[0084] exist Figures 15 to 18 , a further advantageous embodiment of a device 10 for connecting material webs 11 , 12 is shown, which, compared to the preceding embodiments, dispenses with the weakening devices 28 , 29 .
[0085] Fig.15 The device 10 for connecting material webs 11, 12 is shown, wherein the new material web 12 has already been handed over to the overwinder 27. Correspondingly, the finished and new material webs 11, 12 are guided in a guide section 13 one above the other at a distance from one another.
[0086] exist Fig.16 In the embodiment, the pressing elements 15, 17 arranged on both sides of the material webs 11, 12 also rotate as in the previous embodiment, so that these pressing elements come into contact with the corresponding material webs 11, 12. The pressing elements 15, 17 rotate at a speed coordinated with the process speed and press the two material webs 11, 12 toward each other in the connecting section 13. The pressing surfaces of the pressing elements 15, 17, which are in contact with the material webs 11, 12, have embossing surfaces in this advantageous embodiment, thereby establishing an embossed connection 21.
[0087] The weakening lines 19, 20 are introduced into the material webs 11, 12 by means of an embossing process. The weakening lines 19, 20 are preferably located at the transition of the embossed connection to the unaffected section of the material webs 11, 12.
[0088] Fig.17 The separation of the material webs 11, 12 is shown during the connection by the hold-down elements 15, 17, which at this point in time secure the conveyed material webs 11, 12. During the connection process, the forewinder 27 is operated at a speed higher than the process speed, thereby increasing the tensile stress in the new material web 11 between the forewinder 27 and the embossed connection 21, which at this point in time is secured at the process speed between the hold-down elements 15, 17. This causes the new material web 12 to separate at the weakening line 19.
[0089] At this point in time, the roll 25 of the finished material web 11 on the roll receiving portion 34 is decelerated, so that the finished material web 11 is conveyed at a speed lower than the process speed. As a result, the tensile stress in the finished material web 11 is increased between the roll 25 and the embossed connection 21, which is fixed at this point in time at the process speed between the pressure elements 15, 17, so that the finished material web 11 tears at the weakening line 20. The remaining part of the finished material web 11 can then be wound up.
[0090] Then, as in Fig.18 As shown in FIG. 1 , the material webs 11 , 12 connected by means of the embossed connection 21 are fed from a new reel 26 on a reel receiving device 35 .
[0091] Subsequently, the new reel 26 with the new material web 12 can be rotated to the position of the final reel 25 by the turntable feeder 36. Thus, the new reel 26 with the new material web 12 can take the position of the final reel 25 with the final web 11 after connection.
[0092] Fig.19 The connection of the ending material web 11 to the new material web 12 by means of an embossed connection 21 is shown in a top view.
[0093] exist Fig. 20 , the connection of the ending material web 11 to the new material web 12 by means of an adhesive connection 24 is shown.
[0094] List of reference numerals:
[0095] 10. Installation
[0096] 11 Final material width
[0097] 12 New material formats
[0098] 13 Connection section
[0099] 14 Clamping element
[0100] 15 Clamping element
[0101] 16 Pressing surface
[0102] 17 Pressing surface
[0103] 18 Conveying direction
[0104] 19 Weakness Line
[0105] 20 Weakness Line
[0106] 21 Stamping connection
[0107] 22 Bonding sheet bracket
[0108] 23 Bonding sheet
[0109] 24 Adhesive connection
[0110] 25 reels
[0111] 26 reels
[0112] 27 Forewinder
[0113] 28 Attenuation Device
[0114] 29 Attenuation Device
[0115] 30 knife roller
[0116] 31 Support roller
[0117] 32 Swinging element
[0118] 33 Supply Agency
[0119] 34 Roll receiving section
[0120] 35 roll receiving part
[0121] 36 Rotary feeder
[0122] 37 Rollers
Claims
1. A device (10) for connecting material webs (11, 12), in particular diaphragms, for producing energy cells, wherein: The finished material web (11) can be connected to a new material web (12), wherein The ending material web (11) and the new material web (12) can be guided at a distance from one another in the connecting section (13), wherein - two pivotable or rotatable pressing elements (14, 15) with pressing surfaces (16, 17) are provided, which are designed to press the ending and new material webs (11, 12) toward each other in a connecting section (13) and to connect the ending material web (11) and the new material web (12) to each other, wherein The holding-down elements (14, 15) are designed to connect the material webs (11, 12) during movement along the conveying direction (18) of the ending and new material webs (11, 12), and wherein The device (10) is designed to produce weakening lines (19, 20), preferably perforation lines, in the ending and new material webs (11, 12), respectively, and to separate the material webs (11, 12) at the weakening lines (19, 20), preferably perforation lines, respectively, by applying increased tensile stress in the material webs (11, 12).
2. The device (10) according to claim 1, characterized in that The pressing surfaces (16, 17) of the pressing elements (14, 15) are embossing surfaces and the pressing elements (14, 15) are designed to produce an embossing connection (21) when the ending and new material webs (11, 12) are pressed against each other.
3. The device (10) according to claim 1 or 2, characterized in that The device (10) has a bonding sheet holder (22) which is designed to hold a bonding sheet (23) bonded on both sides between the ending and new material webs (11, 12), wherein The pressing elements (14, 15) are designed to produce an adhesive connection (24) between the material webs (11, 12) and the adhesive sheet (23) when the ending and new material webs (11, 12) are pressed toward each other.
4. The device (10) according to any one of the preceding claims, characterized in that The device (10) is designed to increase the tensile stress in the new material web (12) and / or in the final material web (11) during the production of the embossing connection (21) and / or the adhesive connection (24) in order to separate the material webs (11, 12) by the respectively increased tensile stress.
5. The device (10) according to claim 4, characterized in that The device (10) is configured to: - for the purpose of separating the terminated material web (11), an increased tensile stress is generated in the terminated material web (11) between the weakening line (19) and the reel (25) with the terminated material web (11), and In order to separate the new material web (3), an increased tensile stress is built up in the new material web (12) between the weakening line (20) and the overwinder (27) with the new material web (12).
6. The device (10) according to any one of the preceding claims, characterized in that The pressing elements (14, 15) each have a curved pressing or embossing surface which extends over the material web (11, 12) during pressing or embossing.
7. The device (10) according to any one of the preceding claims, characterized in that At least one weakening device (28, 29) is arranged upstream of a connecting section (13) for a terminating material web (11) and / or a new material web (12) opposite to the conveying direction (18), the at least one weakening device being designed to produce a weakening line (19, 20) in the material web (11, 12).
8. The device (10) according to claim 7, characterized in that The weakening device (28, 29) has a knife roller (30) and a support roller (31), wherein the support roller (31) is pivotable and is designed to come into contact with the material web (11, 12) during the pivoting, to move the material web (11, 12) and to press it against the knife roller (30).
9. The device (10) according to any one of the preceding claims, characterized in that The pressing elements (14, 15) are designed to produce a weakening line (19, 20) in the ending and new material web (11, 12), respectively.
10. The device (10) according to any one of the preceding claims, characterized in that The device (10) is designed to produce a weakening line (20) in a new material web (12) along a conveying direction (18) relative to a connection, in particular an embossed connection (21) and / or an adhesive connection (24) and / or to produce a weakening line (19) in a terminal material web (11) counter to the conveying direction (18) relative to the embossed connection (21) or the adhesive connection (4).
11. The device (10) according to any one of the preceding claims, characterized in that A pivoting element (32) is provided which is designed to take a new material web (12) from a new reel (26), guide it through the connecting section (13) and transfer it to the headwinder (27).
12. The device (10) according to any one of the preceding claims, characterized in that The device (10) has a feed device (33) having two roll receptacles (34, 35) for rolls (25, 26) of material webs (11, 12).
13. The device (10) according to any one of the preceding claims, characterized in that The feed mechanism (33) has a carousel feeder (36) on which the roll receiving parts (34, 35) are arranged.
14. A method for connecting industrial material webs (11, 12) for producing energy cells, characterized in that The method is carried out using a device (10) according to any one of the preceding claims.
15. The method according to claim 14, characterized in that The device (10) has a headwinder (27) with a certain diameter, wherein a portion of the new material web (12) is wound from a roll (26) on a roll receiving part (35) onto the headwinder (27), wherein the number of rotations of the headwinder (27) and the roll receiving part (35) is detected, and the diameter and / or the circumference of the roll (26) is calculated from the detected number of rotations.