Method for producing a wound energy cell, an energy cell, a battery, and a device for producing a wound energy cell

Abstract

The invention relates to a method for producing wound energy cells (15) from at least two material webs (11, 12, 13, 14) arranged on top of one another, with a material web winding (16) wound around a longitudinal axis of the energy cell (15), wherein the material web winding (16) is created by winding the material web (11, 12, 13 ,14) around a winding element (17) extending in the direction of the longitudinal axis of the energy cell (15), wherein, before or alongside the winding of the material webs (11, 12, 13, 14), the winding element (17) is operatively connected to at least one surface (18) of the material webs (11, 12, 13, 14) to be wound around the winding element (17). The invention also relates to an energy cell (15), a battery and a corresponding device (10) for producing an energy cell (15) according to the invention.

Description

[0001] Method for producing a wound energy cell, an energy cell, a battery and a device for producing a wound energy cell

[0002] The invention relates to a method for producing wound energy cells, an energy cell and a battery.

[0003] Furthermore, the invention relates to a device for producing wound energy cells from at least two material webs arranged one above the other, comprising at least one feed device for feeding the material webs, a transport device for transporting the material webs in the transport direction through the device, wherein the transport device comprises at least one transport element.

[0004] Devices and methods for producing wound energy cells are known from the prior art. Furthermore, corresponding energy cells and batteries are sufficiently known. Energy cells or energy storage devices within the meaning of the invention are used, for example, in motor vehicles, other land vehicles, ships, aircraft or also in stationary systems such as photovoltaic systems in the form of battery cells or fuel cells, in which very large amounts of energy must be stored over longer periods of time. For this purpose, such energy cells regularly have a winding of material webs that serve as the starting materials for such energy cells. When winding round cells, the winding material is typically selected from four anode, cathode and separator webs of different lengths, which are available, for example, as a film or generally as a material web.In known processes or devices for manufacturing energy cells, the material webs are usually fed separately along different paths to a winding core. For this purpose, the material webs are regularly pre-cut to the desired width and / or length in an upstream manufacturing process. The material webs containing the anodes and cathodes are cut from a continuous web, for example, and then wound onto a continuous web of separator material in the final winding process. The material webs must consistently have a specific width and length to ensure an accurately wound energy cell.

[0005] With known devices and methods, the supply of material webs to the winding core cannot be continuous, as the material webs are fed to a quasi-stationary, central winding core. This winding core is generally only rotatable about its longitudinal axis or is rotated about its longitudinal axis in order to wind the material webs into an energy cell or wound material webs. After the winding process, the winding core must be removed from the energy cell or the wound material webs (material web roll) before the winding process of the energy cell or the material web roll is completed in the winding station. This results in only a discontinuous production process for the energy cells, and the provision and return of the winding cores also involves considerable logistical effort.Furthermore, removing the winding core from the energy cell or the material web winding may result in damage or a loss of quality to the material webs or the energy cell or the material web winding, which may lead to safety risks or damage to the installed energy storage device.

[0006] With the ever-increasing demand for alternative drive concepts, electric drives are becoming more and more of a focus of attention. A major challenge here is ensuring effective processes for manufacturing energy storage devices. Winding material webs into energy cells presents the problem that the material webs are handled separately and then loosely fed to the winding core one after the other. All webs must be controlled and cannot be transported together. Existing devices and processes require a great deal of space during the winding process, and the individual material webs must be subjected to only minimal (mechanical) stress. The material webs must be fed one after the other to the central, virtually stationary winding core, while ensuring the fastest possible production speeds.The material webs are typically very thin, flat sheets, which tend to degrade in quality, particularly under compression and torsional stress. Therefore, there are inherent limitations in transport speeds and transport guides. Furthermore, the material webs regularly slip during the winding process, especially during core removal, leading to rejects and quality losses in the wound energy cells.

[0007] Due to the discontinuous nature of the production of the material web rolls, the subsequent processes cannot be integrated into the energy cell manufacturing process, as the removal of the winding core requires the material web roll to be reprocessed. This reduces production speed and increases the risk of damage during the manufacturing process.

[0008] It is therefore an object of the present invention to provide a method for producing wound energy cells from material webs, energy cells, batteries and a corresponding device for producing wound energy cells, which on the one hand is intended to ensure continuous production of the energy cells and on the other hand is intended to enable cost-efficient production and production at the highest possible production rates without this having a detrimental effect on the quality properties during the production of energy cells.

[0009] This object is achieved by the method mentioned at the outset in that the wound energy cells are produced from at least two material webs arranged one above the other, with a material web roll wound around a longitudinal axis of the energy cell, wherein the material web roll is produced by winding the material webs around a winding element extending in the direction of the longitudinal axis of the energy cell, wherein the winding element is brought into operative connection with at least one surface of the material webs to be wound around the winding element before or with the winding of the material webs.

[0010] The method according to the invention ensures that the at least two material webs are reliably and uniformly wound around the winding element to form a material web roll. By producing a material web roll from the at least two material webs, it is possible, for example, for the winding element to remain in the material web roll, so that the energy cells can be manufactured in a continuous process. The winding element is brought into operative connection with at least one surface of the material webs to be wound around the winding element before or during the winding of the material webs, whereby the material webs do not have to be fed into the winding process together during winding, but the bringing into contact of the winding element with at least one surface of the material webs and the subsequent winding can take place spatially separate from one another.In other words, the process of winding the material webs is not tied to the provision of the winding element. The material webs provided with the winding element can then preferably be wound at a suitable location or facility. This opens up various possibilities for the introduction or use of a winding element, which can perform various additional functions in the energy cell by preferably remaining in the material web roll. Such winding elements are alternatively also referred to as winding cores, auxiliary cores, or auxiliary elements. The material of the winding element is not relevant to the invention, and in principle any materials can be provided that enable the production / winding of an energy cell, taking into account the material webs used. Preferably, plastics, particularly preferably PE or PP, can be used as materials for the winding elements.However, any other material is conceivable, such as aluminum or copper, it just has to be compatible with a preferably provided cell chemistry of the energy cell. The winding element can have positive aspects for a preferably provided liquid cell chemistry (e.g. electrolyte) in that the winding element is designed and configured, for example, as a storage medium for this. The winding element is preferably designed and configured to be porous. Furthermore, the winding element can have a supporting function for the material webs to be wound, as a result of which better mechanical properties of the energy cell can be provided. In addition, it can be expedient for the winding element not to be separated from the material web roll after winding, as a result of which the risk of damage to or loss of quality of the energy cell is minimized.Preferably, the winding element is applied to the uppermost material web of the material webs to be wound. Alternatively, the winding element can, for example, be applied to two of the material webs. Bringing the winding element into operative connection with at least one surface is more preferably achieved by at least temporarily fixing the winding element on or with at least one of the material webs. The material webs brought into operative connection with the winding element can preferably be pulled and moved and fed together "as one material web" to the downstream winding process. The corresponding material webs can also be transported more flexibly, whereby a greater number of windings and geometries of the energy cells can be produced and at the same time the risk of slipping or breakage of the material webs is reduced.In preferred embodiments, more than one winding element can be provided around which the material webs can be wound to form the material web roll.

[0011] The operative connection of the winding element with at least one surface of the material webs is preferably irreversible, so that the winding element is firmly connected to at least one material web. In further preferred embodiments, it may be expedient for the winding element to be reversibly introduced into at least one surface of the material webs to be wound around the winding element. Fixing the winding element can be advantageous, for example, for transporting the material webs within a device, machine, or system complex. Such winding process systems can preferably comprise further means and / or elements to support and / or form and set up the introduction of the winding element and / or subsequent winding.

[0012] The material webs are preferably endless webs and more preferably comprise at least one material web of a separator material, which is also referred to, inter alia, as a separator web, separator material web, or separator foil. More preferably, at least one further material web is formed from an anode web or cathode web, which are also referred to as anode material web or cathode material web, anode foil, or cathode foil. Preferably, the at least two material webs comprise two separator material webs, wherein the winding element is brought into operative connection with at least one surface of the material webs before or during the winding of the material webs. According to the invention, it is not necessary for only two material webs to be provided for the production of wound energy cells.It can further preferably be provided that the material webs comprise, in particular, two separator material webs and at least one further material web, for example an anode and / or cathode material web. The anode or cathode material web is preferably arranged between two separator material webs in order to provide the corresponding starting materials for an energy cell. Furthermore, further materials or processing steps can preferably be added to the material web coil in order to form the energy cell. When the material webs are arranged one above the other, it is not essential that all material webs lie on top of one another over the entire transport period. "Steady on top of one another" within the meaning of the invention means that the material webs are arranged one above the other, at least in sections.Superimposed within the meaning of the invention can therefore mean that the material webs are arranged one above the other at a distance from one another or essentially without any spacing, wherein a substantially congruent arrangement of the material webs is more preferably provided. If the material webs are arranged at a distance from one another, they can preferably be transported at least partially by means of independent transport means; if they are arranged without any spacing, the material webs can preferably be transported by a single transport means. If there are several material webs, it is therefore conceivable that one of the material webs is arranged on another material web for only a certain section; it is preferably conceivable that an anode or cathode material web can in each case be arranged completely on a separator material web and / or is covered by a separator material web.

[0013] The inventive concept equally includes methods with corresponding devices / systems / machines whose widths are adapted such that several or more material webs can be processed in parallel. Such devices are preferably designed and configured to be variable, particularly in terms of their (machine) width, so that several material webs can be brought into operative connection with a winding element next to one another or in parallel. The method equally includes the possibility of processing several material webs in parallel with a single device, so that one winding element is brought into operative connection with at least one surface of a plurality of at least two material webs to be wound around the winding element.In other words, a device can process multiple or a large number of material webs in parallel by adjusting the device components accordingly. To achieve this, the provided equipment, stations, and the corresponding resources must be adapted accordingly to provide scalability in width.

[0014] A preferred embodiment is characterized in that the at least two material webs are present as a material web composite that is connected at least in regions, or in that the at least two material webs are connected at least in regions to form a material web composite before winding. In this way, it is possible for the at least two material webs to create a "common" beginning through the material web composite, which serves as the starting point for winding. Alternatively or additionally, at least two of the material webs can be connected to one another at one web end. The at least partial presence or creation of a material web composite provides an opportunity to conveniently process the superimposed material webs in a bundled manner. The connected material webs can be pulled and moved and fed to the winding process together "as one material web."The joined material webs can then be alternately fed to multiple rolling processes, with one material web producing n rolls. This reduces the number of feeders and / or transport devices required during the winding process, allowing for faster and more flexible production of energy cells. The partially joined material webs can also be transported more flexibly, allowing for a greater number of windings and geometries of the energy cells and reducing the risk of slipping or breakage of the material webs.

[0015] An advantageous further development is characterized in that the winding element is produced from a section of at least one of the material webs. In this preferred embodiment, no external winding element is required which is brought into operative connection with at least one surface of the material webs, but rather the operative connection with at least one surface of the material webs is produced by forming the winding element from a section of at least one of the material webs. In particular, a section or region of at least one material web is provided which is produced into a winding element by a winding element production process preceding the winding process. The winding element can be produced, for example, by rolling the section of at least one of the material webs.To form the winding element from the section of at least one of the material webs, further additives and / or auxiliary materials can preferably be used to provide specific mechanical properties of the winding element, as required, in particular strength, stiffness, or durability properties. Such additives and / or auxiliary materials can be, for example, adhesives.

[0016] In a further advantageous embodiment of the invention, the section of the material web comprises at least one separator web; preferably, the section is formed at least partially from one or two separator webs. Separators are usually made of thermally activatable plastics such as PE or PP, which are well suited for forming desired, specific shapes or material compositions. Plastics are therefore well suited for forming the winding element in an energy cell from the section of at least one separator web, as they have high electrical insulation properties and are highly resistant to corrosion. Furthermore, thermoplastics are easy to shape and process, making it simple to produce a durable winding element.The treatment of separator material webs made of thermoplastics such as PE or PP represents an ideal material for mass production with low raw material expenditure. In the process according to the invention, the material webs are present, for example, as multilayer material webs consisting of two separator material webs, with at least one of the separator material webs comprising the section for producing the winding element, which is preferably free of anode or cathode material. This section is produced before or during the winding process to form a winding element around which the material webs are wound to form the material web roll.

[0017] An expedient embodiment of the invention is characterized in that the winding element is arranged, preferably fixed, transversely or longitudinally to the transport direction of the material webs on the surface of at least one of the material webs. The arrangement of the winding element on the surface of at least one of the material webs depends in particular on the subsequent orientation of the winding. The winding of the material webs takes place by winding the material webs around the winding element extending in the direction of the longitudinal axis of the energy cell. However, when applying the winding element to the at least one material web, the way in which the material webs are transported is not yet crucial. It can be provided that the winding elements are applied longitudinally to the transport direction of the material webs, so that the winding then has to take place transversely to the original transport direction of the material webs.For a continuous production process, however, it may be expedient to arrange the winding elements transversely to the transport direction on the surface of at least one of the material webs, in order to directly form and set up the subsequent winding of the material webs in the transport direction. The fixed arrangement of the winding element on the surface of at least one of the material webs prevents the winding element from slipping and, if necessary, ensures reliable transport of the corresponding material webs.

[0018] According to a further preferred embodiment of the invention, the winding element remains stationary in the material web roll. "Stationary" within the meaning of the invention means that the winding element remains in operative connection with the arranged surface of the corresponding material web, at least during the production of the material web roll. Preferably, the winding element is arranged irreversibly during the winding of the material webs into the material web roll. To fix the winding element to at least one surface of the material webs to be wound around the winding element, auxiliary and / or additional materials can be provided in order to form and establish a fixation or stationary arrangement of the winding element.

[0019] A further advantageous embodiment of the invention is characterized in that the material webs are continuous webs for producing a plurality of wound energy cells. The material webs can be provided as a wound continuous web or as a continuous web run for producing the energy cells. The continuous webs are preferably produced in an upstream manufacturing process. The continuous webs are more preferably provided continuously and can already be available in predetermined configurations of the stacked arrangement.

[0020] A preferred development of the invention is characterized in that at least one of the material webs is cut by means of at least one cutting device transversely and / or longitudinally to the transport direction of the material webs, preferably before and / or after the winding element. By cutting the material webs by means of the at least one cutting device, it is possible to cut the material webs according to predetermined requirements for the energy cell. The requirements can in particular relate to the length and / or width of the starting materials of the energy cell. For cutting by means of the cutting devices, it can be expedient to cut the material webs from continuous webs. More preferably, the material webs are cut lengthwise and / or transversely to the transport direction of the material web.The cutting device provides a broader range of applications for winding, for example, by allowing wider material webs to be cut into narrower material webs of desired dimensions, which are then wound into the desired material web rolls. Furthermore, winding elements preferably arranged on the material webs can be cut using the cutting device. Furthermore, the cutting device can also be used alternatively or additionally to create a different cutting pattern, for example, special cutouts, conductor tracks, or other specific cutting patterns.

[0021] A useful embodiment of the invention is characterized in that the material webs are transported by means of at least one transport element, wherein the winding element is arranged, preferably fixed, on at least one surface of the material webs to be wound around the winding element by means of the transport element during transport of the material webs, transversely or longitudinally to the transport direction of the material webs. The transport element performs a dual function, since, on the one hand, it provides transport of the material webs and, on the other hand, it provides an arrangement of the winding element on at least one surface of the material webs to be wound around the winding element.For this purpose, the material webs are at least partially transported by the winding element arranged on the transport element, whereby a contact is formed and established between the winding element and at least one surface of the material webs to be wound around the winding element. This enables a simple creation of an operative connection between the winding element and the material web, thereby ensuring a reliable arrangement of the winding element on the material webs.

[0022] An advantageous further development is characterized in that the transport element is drum-shaped and is designed to transport the material webs by means of the transport element at least in sections along the circumference, wherein the material webs are transported via a winding element arranged on the circumference of the transport element for arranging the winding element on the material webs. The drum-shaped transport element, on the one hand, ensures continuous provision of the winding element and, on the other hand, ensures controlled and continuous transport of the material webs via the winding element. Preferably, the drum-shaped transport element continuously provides winding elements for arrangement on the material webs, thereby creating a continuous production process.The winding elements can preferably be provided in troughs provided for this purpose on the drum-shaped transport element, which enable at least temporary arrangement on the transport element. The winding element is preferably continuously fed to the drum-shaped transport element in a preceding provision process in order to then be arranged on the material webs or to be received by the material webs. In preferred developments, it can be expedient for a winding element or a material web roll to be transferable from one trough into another receiving trough during the winding process. This can ensure safe and gentle transport of the winding element or the material web roll. For this purpose, the transport device can further preferably comprise at least one rotating body having at least one trough.

[0023] In a further preferred embodiment of the invention, the winding element is arranged in a fixable manner on at least one surface of the material webs to be wound around the winding element. Preferably, the winding element and / or at least a surface of one of the material webs can be provided with an auxiliary and / or additive, for example an adhesive, preferably a glue, to ensure a fixed arrangement of the winding element on the material webs.

[0024] A further preferred embodiment is characterized in that the winding element is fed to at least one of the material webs by means of a drum, preferably by means of a drum comprising a counter-support element. For this purpose, the drum is in engagement with the material webs in order to feed the winding element to at least one of the material webs. The drum preferably has troughs for receiving the winding elements in order to feed them to at least one of the material webs as required. The counter-drum preferably has no trough and can more preferably be designed and configured to transport the material webs. In this way, the counter-drum can simultaneously function as a transport element. More preferably, the counter-drum has a rolling surface. The drum is designed and configured to feed the winding elements to the at least one material web in a timed or continuous manner.

[0025] In an alternative embodiment, the counter-drum, the winding counter-support and / or the rotating body have, at least in some regions, a "structured surface" and / or an engagement element in order to create or form specific mechanical and / or surface-structural properties in at least one of the material webs, at least in some regions. In this way, a winding start for starting the winding can preferably be formed. Particularly preferably, a winding element can be created in this way through at least one of the material webs in order to form and establish the winding of the material web roll around it.In a preferred development of the invention, the counter-drum, the winding counter-support, and / or the rotating body have a coated surface at least in some regions, wherein the coated surface is provided in particular for developing different sliding properties of at least one of the material webs on the counter-drum, the winding counter-support, and / or on the rotating body. The coated surface can in particular be designed and configured to improve the sliding of at least one of the material webs and / or the material web roll, i.e., to reduce the frictional force, or to reduce the sliding of at least one of the material webs and / or the material web roll, i.e., to increase the frictional force.

[0026] A useful embodiment of the invention is characterized in that the material web roll is wound by means of a winding drum, wherein the material webs guided on the winding drum are wound around the winding element by means of a winding counter-layer. By means of the winding drum in conjunction with the winding counter-layer, the material web roll is created by winding the material webs around the winding element. The material webs are thus wound around the winding element in the direction of the longitudinal axis of the energy cell, whereby, among other things, a corresponding material web roll is created depending on a predetermined or intended length of the material webs. The material webs can be cut to size before or during the winding process in order to create a corresponding material web roll with a predetermined length of the material webs.The winding drum and / or the winding counter-surface can be controlled and / or regulated in order to form and set up a desired winding. In this way, in particular the duration, the force input and / or the speed of the winding can be adjusted. More preferably, further factors in the production of the material web rolls can be influenced by means of the winding drum and / or the winding counter-surface, for example the temperature supply, (contact) pressures, transport speeds, etc. The object is also achieved by the energy cell according to the invention in a winding design, in particular a cell of a lithium-ion battery, with a material web roll wound around a longitudinal axis of the energy cell and consisting of at least four material webs, characterized in that the energy cell is produced according to a method according to the invention.The material webs are preferably each an anode and a cathode web, as well as two separator webs, which are present, for example, as a film. The anode and the cathode webs are each covered, at least in part, by a separator web at least on one surface, thereby providing an energy cell structure. In the energy cell according to the invention, the winding element preferably remains in the energy cell or in the material web winding, which, on the one hand, enables continuous, more cost-effective, and rapid production of an energy cell, and, on the other hand, allows specific properties of the energy cell to be formed and configured by the winding element remaining in the energy cell.

[0027] The object is further achieved by a corresponding battery, in particular a lithium-ion battery, which is characterized by comprising energy cells according to the invention. This also enables cost-effective and reliable production of a battery according to the invention, which, thanks to the corresponding method according to the invention, exhibits the advantages of the energy cell. Such batteries can be used in a wide range of applications and, thanks to the corresponding manufacturing method, exhibit the positive aspects of the energy cell according to the invention.

[0028] The object is further achieved by the device mentioned at the outset in that a winding device is provided for winding the material webs into a wound material web roll, wherein at least one winding element introduction device is arranged upstream of the winding device, which winding element is designed and configured to bring a winding element extending in the direction of the longitudinal axis of the energy cell into operative connection with at least one surface of the material webs to be wound around the winding element before or during the winding of the material webs. The device according to the invention ensures that the at least two material webs can be transferred into a wound material web roll by means of the winding device, wherein by means of the winding element introduction device a winding element can be brought into operative connection with at least one surface of the material webs to be wound around the winding element before or during the winding of the material webs.In this way, it is possible, for example, for the at least two material webs to be wound simultaneously around the winding element that serves as the starting point for winding. By introducing the winding element using the winding element introduction device, a possibility is created to make the winding element centrally available to the material webs prior to winding in order to wind the superimposed material webs together accordingly. Preferably, the correspondingly produced material web roll can then be further processed into a wound energy cell. By introducing the winding element onto the at least one material web, the material web roll is built up around the winding element, thereby ensuring continuous production of material web rolls and energy cells.The material webs equipped with the winding element can be wound together with the entire material web to be wound during the winding process. The material webs equipped with the winding element can be preferentially pulled and moved and fed together "as a single material web" to the downstream winding process. Inserting the winding element using the winding element insertion device reduces the number of feeders and / or transport devices required during the winding process, thus enabling faster and more flexible production of energy cells. The material webs equipped with the winding element can also be transported more flexibly, allowing a greater number of windings and geometries of the energy cells to be produced and reducing the risk of slipping or breakage of the material webs.Preferably, the dimensions, materials, and dimensions of the winding device, the feed device, and / or the winding element insertion device are selected depending on the thickness or length of the material web rolls to be wound, or the intended diameter or winding intensity of the material web roll. The number of winding revolutions by the winding device is preferably predetermined from the material web length, thereby enabling targeted stopping and / or transfer to another unit with a defined seam position of the last outer wrap of the material web roll.

[0029] The inventive concept equally encompasses devices whose width is adapted such that a plurality or multiplicity of material webs can be produced simultaneously, parallel to a material web roll. Such devices according to the invention are preferably designed and configured to be variable, particularly in terms of their (machine) width, so that a plurality of material webs can be transported side by side or in parallel by means of the transport device. Thus, with a single device, winding elements can be introduced onto a plurality or multiplicity of at least two material webs by means of the winding element insertion device, in order to subsequently form and set up a material web roll by means of the winding device.In other words, a device processes multiple or a large number of material webs in parallel by adapting the device components accordingly in width to enable parallel insertion of winding elements and subsequent winding. For this purpose, the provided devices, stations, and the respective means must be adapted accordingly to provide scalability in width.

[0030] To avoid repetition, in connection with the device according to the invention, particular reference is also made to the advantages already described in detail in connection with the method according to the invention. These also apply analogously to the device according to the invention described below.

[0031] A further development is characterized in that the winding element insertion device is designed and configured to form the winding element from a section of at least one of the material webs. In one possible embodiment, the winding element insertion device makes it possible for the section of at least one of the material webs to be formed into the winding element by deformation. The deformation can be carried out, for example, by rolling the section into a winding element. For this purpose, the winding element insertion device can comprise further means, for example at least one rolling element, to form and establish a rolling of the section into a winding element.Preferably, the winding element can be produced continuously from the section by means of the winding element insertion device, which means that the material webs can be continuously transported, and that a winding element can be formed from the section each time they pass through the winding element insertion device. For forming the winding element from the section, additional additives and / or auxiliary materials can be provided, which can be added by means of suitable devices.

[0032] In a further advantageous embodiment of the invention, the winding element can be arranged, preferably fixed, transversely or longitudinally to the transport direction of the material webs on the surface of at least one of the material webs by means of the winding element introduction device.

[0033] An expedient embodiment of the invention is characterized in that the device further comprises at least one cutting device which is designed and configured to cut the material webs transversely or longitudinally to the transport direction, preferably arranged before and / or after the winding element introduction device. The at least one cutting device makes it possible to cut at least one or each of the material webs and / or the winding element. The cutting devices are preferably provided for cutting continuous webs to length; alternatively or additionally, the cutting device can be provided to cut the winding element to a predetermined length, width and / or shape. The cutting device provides a broader range of applications for the device, for example by allowing wider material webs to be cut into narrower material webs with desired dimensions.Furthermore, material webs can be cut according to a predetermined cut. More preferably, the cutting device can alternatively or additionally be used to create a different cutting pattern, for example, special recesses, conductor tracks, or specific additional cutting images. The cutting devices can be designed and configured, for example, as a cutting means and a counter-drum. For this purpose, the cutting means cuts the material webs guided on the counter-drum with the predetermined cutting sequence or length, which is defined by the cutting process and / or the corresponding cutting means. The cutting device can preferably comprise a punching, laser, knife, or thermal cutting device and be designed and configured to carry out the cutting process.

[0034] A further preferred embodiment of the invention is characterized in that at least one of the transport elements is designed and configured as the winding element introduction device in order to arrange, preferably to arrange in a fixed manner, the winding element during the transport of the material webs on at least one surface of the material webs to be wound around the winding element, transversely or longitudinally to the transport direction of the material webs. This makes it possible to provide a dual function for the transport elements in order to enable compact and efficient transport of the material webs and, at the same time, to carry out provision of the winding elements. Within the meaning of the invention, however, it is not necessary for the dual function to be provided by the at least one transport element. The transport element is preferably designed and configured as a rotating body, which more preferably comprises receiving points for receiving the winding elements.

[0035] A preferred development of the invention is characterized in that the transport element is drum-shaped and is designed to transport the material webs by means of the transport element at least in regions along the circumference, wherein the material webs can be transported via a winding element arranged on the circumference of the transport element in a trough for arranging the winding element on the material webs.

[0036] A further expedient embodiment of the invention is characterized in that the winding element insertion device is designed as a drum having at least one trough and is configured to receive the winding element and / or transfer it to the material webs. The drum preferably has multiple or multiplicity of troughs to receive a corresponding number of winding elements and transfer them to the material webs. To secure the winding elements on the winding element insertion device, further means and / or features can preferably be provided, for example, a vacuum application to hold the winding element at least as needed.

[0037] A preferred development of the invention is characterized in that the winding device is designed and configured as a winding drum comprising a winding counter-layer, in order to wind the material webs transported on the winding device in operative connection with the winding counter-layer to form the material web roll. The winding counter-layer can in principle be formed from any suitable material and / or shape. The winding counter-layer can, for example, comprise a conveyor belt and / or one or more rollers or rotating bodies. Furthermore, it can be expedient for the winding counter-layer to be designed and configured to be drivable or rigid. Further preferably, the configuration of the material web roll to be wound is designed and configured to be adjustable, controllable and / or regulatable by means of the winding counter-layer.

[0038] In a further advantageous embodiment of the invention, at least one delivery device designed and configured to deliver the material web rolls is arranged downstream of the winding device. The delivery device receives the material web rolls from the winding device or the transport device in order to enable continuous production of energy cells. The delivery device is further preferably designed and configured such that it receives a material web roll produced by the winding device or such that a delivered material web roll can be picked up by the delivery device. The delivery device is preferably arranged downstream of the winding device or the transport device, in particular downstream of the rotating body.By means of the dispensing device, an adhesive can further preferably be applied to and / or onto the material web roll in order to secure the material web roll in a substantially dimensionally stable manner, at least temporarily. The adhesive can, for example, be an adhesive strip.

[0039] An expedient embodiment of the invention is characterized in that the winding device, the rotating body and / or the winding counter-support is / are designed and configured to be temperature-controllable and / or pressure-loadable at least in some areas in order to apply a temperature and / or pressure to the material webs or the material web roll at least in some areas. By applying pressure, predetermined mechanical properties can be generated in the material webs and / or the material web roll. In this way, for example, laminating, compressing or hardening of the material webs and / or the material web roll is possible in order, for example, to bond them to one another at least in some areas or to influence the mechanical properties of the end product. Preferably, the winding counter-support or the rotating body is designed and configured to be heatable and / or coolable at least in some areas.Alternatively or additionally, the rotating body can be designed and configured to be movable, for example, with an adjustable pressure against the material webs and / or against the material web roll, in order to generate a predetermined pressure by contacting the roll support. Alternatively or additionally, a device for introducing auxiliary and / or additive materials can be provided, for example, to form and establish a reversible or irreversible bond between the material webs and / or the material web roll.

[0040] Further useful and / or advantageous features and developments, as well as preferred device objects, emerge from the dependent claims and the description. Particularly preferred embodiments of the device according to the invention and the method according to the invention are explained in more detail with reference to the accompanying drawings. The drawings show: Fig. 1 is a schematic cross-sectional view of a device according to the invention for carrying out a method according to the invention.

[0041] Fig. 2 is a schematic representation of a further embodiment of a device according to the invention in cross section for carrying out a method according to the invention and

[0042] Fig. 3 a and b each show a schematic representation of material webs which can be produced into an energy cell by means of the device according to the invention or by means of the method according to the invention.

[0043] The device according to the invention is described in more detail with reference to the above figures.

[0044] The devices 10 shown in the drawings are designed and configured as an independent and separate device 10 by way of example. However, the invention equally applies to comparable devices 10 that are integrated into a more complex system with multiple assemblies or upstream and / or downstream additional device or machine components. Such devices 10 can, in particular, be designed and configured with variable (machine) widths, so that multiple material webs 11, 12, 13, 14 can be processed in parallel using the device 10. In other words, several or a plurality of material webs 11, 12, 13, 14 can be processed in parallel on one device 10 by adapting the device components accordingly in width. For this purpose, the provided devices and the respective means must be adapted accordingly in order to provide scalability in width.

[0045] The intended material webs 11, 12, 13, 14 are preferably produced in a manufacturing machine, which may comprise a device 10 according to the invention and / or downstream of which a device 10 according to the invention is arranged. Such a manufacturing machine—not shown in the figures—preferably comprises different steps to produce the corresponding material webs 11, 12, 13, 14 with the intended properties for producing a wound energy cell. The material webs 11, 12, 13, 14 are generally provided as continuous webs and may already be pre-cut to the intended lengths and / or widths. In an upstream device or in upstream processing steps, the material webs 11, 12, 13, 14 can furthermore be connectable to one another, preferably at least in regions, to form a material web composite 19.

[0046] Fig. 1 and Fig. 2 each schematically show a different embodiment of a device 10 according to the invention for carrying out the method according to the invention. The method serves to produce wound energy cells 15 from at least two material webs 11, 12, 13, 14 arranged one above the other, with a material web roll 16 wound around a longitudinal axis of the energy cell 15, wherein the material web roll 16 is produced by winding the material webs 11, 12, 13, 14 around a winding element 17 extending in the direction of the longitudinal axis of the energy cell 15. The winding element 17 is brought into operative connection with at least one surface 18 of the material webs 11, 12, 13, 14 to be wound around the winding element 17 before or during the winding of the material webs 11, 12, 13, 14. In Fig. 1 and Fig. 2, the process of providing the winding element 17 to the material webs 11, 12, 13, 14 is shown as an example. In Fig. 1 and Fig.In Figure 2, the material webs 11, 12, 13, 14 are each shown as material webs 11, 12, 13, 14 arranged one above the other. According to the invention, the material webs 11, 12, 13, 14 can also be transported one above the other with a (slight) gap. Preferably, the at least two material webs 11, 12, 13, 14 can be present as a composite material web 19 that is connected at least in some areas.

[0047] Alternatively, the at least two material webs 11, 12, 13, 14 can be joined at least in regions to form a material web composite 19 prior to winding. The production of the material web composite 19 preferably takes place before or during the introduction of the winding element 17 onto the at least one surface 18 of the material webs 11, 12, 13, 14. The surface 18 of the material webs 11, 12, 13, 14 is not limited to the upper side, but can also be arranged on the underside of the material webs 11, 12, 13, 14. Surface 18 is essentially understood to mean all free surfaces of the material webs 11, 12, 13, 14 that allow the arrangement of the winding element 17.

[0048] 3a and 3b each show schematic material webs 11, 12, 13, 14 which can be produced to form an energy cell 15 by means of the device 10 according to the invention or by the method according to the invention. If the material webs 11, 12, 13, 14 shown one above the other in FIG. 3 are at least partially connected to one another, this can be referred to as a material web composite 19, which is preferably provided for carrying out the method according to the invention. FIGS. 3a and 3b show an example schematic representation of a material web composite 19. FIGS. 3a and 3b show a section of material webs 11, 12, 13, 14 arranged one above the other.Further preferably, the material webs 11, 12, 13, 14 are preferably two separator material webs 11, 13 and one anode material web 12 and one cathode material web 14 each. The material webs 11, 12, 13, 14 can preferably be arranged one on top of the other in a predetermined sequence, wherein the anode material web 12 or the cathode material web 14 can preferably be arranged between two separator material webs 11, 13.

[0049] In an advantageous embodiment, the winding element 17 is produced from a section 20 of at least one of the material webs 11, 12, 13, 14. The section 20 of the material web 11, 12, 13, 14 preferably comprises at least one separator web 11, 13. More preferably, the section 20 is formed, at least in part, from one or two separator webs 11, 13. Figs. 3a and 3b each show a section 20 formed from a separator web 11, 13. For the intended production of a winding element 17 from the section 20, the section is processed, for example by rolling, forming, etc. For this purpose, further auxiliary and / or additional substances, such as temperature, adhesives, embossing devices, etc., can be used.

[0050] In a preferred embodiment, the winding element 17 is arranged, preferably fixed, transversely or longitudinally to the transport direction T of the material webs 11, 12, 13, 14 on the surface 18 of at least one of the material webs 11, 12, 13, 14. In Figs. 1 and 2, the winding element 17 is arranged transversely on the material webs 11, 12, 13, 14 so that the material webs 11, 12, 13, 14 are subsequently brought into operative connection with at least one surface 18 of the material webs 11, 12, 13, 14 to be wound around the winding element 17. If the winding element 17 is arranged longitudinally to the transport direction T on the material webs 11, 12, 13, 14, a change in the winding direction is preferably necessary, ie the winding must subsequently be produced in the direction of the longitudinal axis of the energy cell 15 to be wound.In such cases, it can be provided that the transport direction T of the material webs 11, 12, 13, 14 is changed by substantially 90° with the longitudinally applied winding element 17.

[0051] In a preferred embodiment, the winding element 17 remains stationary in the material web roll 16. The winding element 17 is thus a component of the energy cell 15 and, in particular, remains in the material web roll 16 during the intended use of the energy cell 15. Further preferably, the winding element 17 is arranged in a fixable manner on at least one surface 18 of the material webs 11, 12, 13, 14 to be wound around the winding element 17. For the arrangement of the winding element 17 on the material webs 11, 12, 13, 14, it may be advantageous to use auxiliary and / or additional materials to ensure a fixed and / or stationary arrangement of the winding element 17.

[0052] Preferably, the material webs 11, 12, 13, 14 are endless webs for producing a plurality of wound energy cells 15. In Fig. 1 and Fig. 2, the devices 10 are each provided to provide endless webs in order to form and arrange them into wound energy cells 15 with the winding element 17.

[0053] In a further advantageous embodiment, at least one of the material webs 11, 12, 13, 14 can be cut by means of at least one cutting device 21 transversely and / or longitudinally to the transport direction T of the material webs 11, 12, 13, 14, preferably before and / or after the winding element 17. Figs. 1 and 3 schematically show a cutting device 21 which is designed and configured to cut the material webs 11, 12, 13, 14. By means of the cutting devices 21, the material webs 11, 12, 13, 14 can be cut, preferably with regard to their length and / or their width. Alternatively or additionally, the winding elements 17 can also be cut and / or, more preferably, certain cutting patterns of the material webs 11, 12, 13, 14 can be implemented.Preferably, the material webs 11, 12, 13, 14 are cut to a predetermined length, which is defined by the subsequent winding, the cutting process and / or the corresponding cutting means.

[0054] As shown in Fig. 1, the material webs 11, 12, 13, 14 are preferably transported by means of at least one transport element 22, wherein the winding element 17 is arranged, preferably fixed, by means of the transport element 22 during the transport of the material webs 11, 12, 13, 14 on at least one surface 18 of the material webs 11, 12, 13, 14 to be wound around the winding element 17, transversely or longitudinally to the transport direction T of the material webs 11, 12, 13, 14. In the device 10 of Fig. 1, the winding element 17 is, on the one hand, transported and provided by means of the transport element 22 and, at the same time, the material webs 11, 12, 13, 14 are transported by means of the transport element 22 and, upon contact with the winding element 17, are brought into operative connection with one another. The winding element 17 is arranged on the surface 18 of the material webs 11, 12, 13, 14 and then wound into a material web roll 16.Preferably, the transport element 22 is drum-shaped and configured to transport the material webs 11, 12, 13, 14 by means of the transport element 22 at least in regions along the circumference, wherein the material webs 11, 12, 13, 14 are transported via a winding element 17 arranged on the circumference of the transport element for arranging the winding element 17 on the material webs 11, 12, 13, 14.

[0055] In a preferred further embodiment, the winding element 17 is fed to at least one of the material webs 11, 12, 13, 14 by means of a drum 23, preferably by means of a drum 23 comprising a counter-support element 24. In the embodiment of Fig. 2, the transport element 22 functions to transport the material webs 11, 12, 13, 14 and also as a counter-support element 24. The drum 23 transfers the winding element 17 to the material webs 11, 12, 13, 14 before or at the start of the winding process. The drum 23 is alternatively designed as a general rotary body and is set up to provide a clocked or continuous supply of the winding elements 17 to the material webs 11, 12, 13, 14. Preferably, a plurality or multiplicity of winding elements 17 (not shown in the figures) are continuously provided to the drum 23 so that they can be fed to the material webs 11, 12, 13, 14.

[0056] As shown in Fig. 1 and Fig. 2, the material web roll 16 is preferably wound by means of a winding drum 25, wherein the material webs 11, 12, 13, 14 guided on the winding drum 25 are wound around the winding element 17 by means of a winding counter-layer 26. For this purpose, the material webs 11, 12, 13, 14 are guided on or by means of the winding drum 25 and brought into operative connection with the winding counter-layer 26. The winding counter-layer 26 provides the contour for winding the material web roll 16, and this is formed during transport along the winding counter-layer 26. The device 10 according to the invention is explained in more detail below with reference to the drawing. Fig. 1 and Fig.2 each schematically show a different embodiment of a device 10 for producing wound energy cells 15 from at least two material webs 11, 12, 13, 14 arranged one above the other, comprising at least one feed device 27 for feeding the material webs 11, 12, 13, 14, a transport device 28 for transporting the material webs 11, 12, 13, 14 in the transport direction T through the device 10, wherein the transport device 27 comprises at least one transport element 22. The transport device 28 is designed and configured to transport the material webs 11, 12, 13, 14 at least partially one above the other by means of the at least one transport element 22.

[0057] The device 10 is characterized according to the invention in that a winding device 29 is provided for winding the material webs 11, 12, 13, 14 to form a wound material web roll 16, wherein at least one winding element introduction device 30 is arranged upstream of the winding device 29, which is designed and configured to bring a winding element 17 extending in the direction of the longitudinal axis of the energy cell 15 into operative connection with at least one surface 18 of the material webs 11, 12, 13, 14 to be wound around the winding element 17 before or during the winding of the material webs 11, 12, 13, 14. In Fig. 1, the winding element insertion device 30 is preferably designed and configured as a portion of the transport element 22, which, on the one hand, transports the material webs 11, 12, 13, 14 and, on the other hand, provides a feed of the winding element 17 during the transport of the material webs 11, 12, 13, 14 to be wound. In Fig.2, the winding element insertion device 30 is designed as a separate drum 23, which feeds the winding element 17 to the material webs 11, 12, 13, 14 to be wound upon contact. Further preferably, the winding element insertion device 30 is designed and configured to form the winding element 17 from a section 20 of at least one of the material webs 11, 12, 13, 14. A winding element 17 can be produced from the section 20, for example, by means of the drum 23, in order to subsequently feed it to the winding device 29 for winding.

[0058] In preferred embodiments, the winding element 17 can be arranged, preferably fixed, on the surface 18 of at least one of the material webs 11, 12, 13, 14 by means of the winding element introduction device 30 transversely or longitudinally to the transport direction T of the material webs 11, 12, 13, 14. The fixed arrangement can be formed, for example, by means of an adhesive, which can be applied to the winding element 17 and / or the surface 18 of one of the material webs 11, 12, 13, 14 by an adhesive application device (not shown in the figures). The fixing of the winding element 17 to at least one surface 18 can particularly preferably be carried out by means of gluing. Preferably, the device 10 further comprises at least one cutting device 21 which is designed and configured to cut the material webs 11, 12, 13, 14 transversely or longitudinally to the transport direction, preferably arranged before and / or after the winding element introduction device 30.In Fig. 1, the cutting device 21 is further preferably arranged upstream of the winding device 29, whereby the endless web can be separated from the material web roll 16 before or after winding in order to ensure continuous production of the energy cells 15. When the winding element 17 is arranged longitudinally to the transport direction T, the winding element 17 is preferably arranged in alignment with the web's longitudinal direction.

[0059] As shown in Fig. 1, preferably at least one of the transport elements 22 is designed as the winding element introduction device 30 and is set up to arrange, preferably to arrange in a fixed manner, the winding element 17 during the transport of the material webs 11, 12, 13, 14 on at least one surface 18 of the material webs 11, 12, 13, 14 to be wound around the winding element 17 transversely or longitudinally to the transport direction T of the material webs 11, 12, 13, M. Further preferably, the transport element 22 is drum-shaped and configured to transport the material webs 11, 12, 13, 14 by means of the transport element 22 at least in regions along the circumference, wherein the material webs 11, 12, 13, 14 can be transported via a winding element 17 arranged on the circumference of the transport element 22 in a trough 31 for arranging the winding element 17 on the material webs 11, 12, 13, 14.Further preferably, the winding element introduction device 30 is designed as a drum 23 having at least one trough 31 and is configured to receive the winding element 17 and / or to transfer it to the material webs 11, 12, 13, 14.

[0060] In a further advantageous embodiment, the winding device 29 is designed and configured as a winding drum 25 comprising a winding counter-layer 26 in order to wind the material webs 11, 12, 13, 14 transported on the winding device 29 in operative connection with the winding counter-layer 26 into the material web roll 16. The winding counter-layer 26 in Fig. 1 has a conveyor belt 33 which is mounted on at least two guide elements 34, which are preferably designed and configured to be drivable. The conveyor belt 33 forms a gap with the winding drum 25 in the course of the winding area, which gap is preferably designed and configured to be variable in width, more preferably controllable and / or regulatable during and / or before / after a winding process.2, the winding counter-layer 26 describes a predetermined winding area, which has a gap that preferably increases along the transport direction T and essentially corresponds to the size of the energy cell 15 to be wound. Preferably, the winding element 17 is positively guided during transport in the winding device 29, whereby the winding is continuously generated.

[0061] In a further advantageous embodiment, the device comprises a dispensing device (not shown in the figures), wherein the dispensing device further preferably has at least one fixing device designed and configured to fix the material web roll 16 at least in certain areas. For this purpose, an adhesive, such as an adhesive strip, a tape, or the like, can be introduced / applied to at least one surface of the material webs 11, 12, 13, 14 and / or to a surface of the material web roll 16 in order to prevent undesired opening / unfolding of the material web roll 16 after winding.

Claims

1. A method for producing wound energy cells (15) from at least two superimposed material webs (11, 12, 13, 14), with a material web coil (16) wound around a longitudinal axis of the energy cell (15), wherein the material web coil (16) is produced by winding the material webs (11, 12, 13, 14) around a winding element (17) extending in the direction of the longitudinal axis of the energy cell (15), wherein the winding element (17) is brought into operative contact with at least one surface (18) of the material webs (11, 12, 13, 14) to be wound around the winding element (17) before or during the winding of the material webs (11, 12, 13, 14), characterized in that the material webs (11, 12, 13, 14) are transported by means of at least one transport element. (22) are transported, wherein the winding element (17) is transported by means of the transport element (22) during the transport of the material webs (11, 12, 13,14) is arranged on at least one surface (18) of the material webs (11, 12, 13, 14) to be wound around the winding element (17) transversely or longitudinally to the transport direction (T) of the material webs (11, 12, 13, 14), preferably in a fixed position.

2. Method according to claim 1, characterized in that the at least two material webs (11 , 12, 13, 14) are present as a material web composite (19) that is at least partially connected, or that the at least two material webs (11 , 12, 13, 14) are connected at least partially to form a material web composite (19) before winding.

3. Method according to claim 1 or 2, characterized in that the winding element (17) is produced from a section (20) of at least one of the material webs (11 , 12, 13, 14).

4. Method according to claim 3, characterized in that the section (20) of the material web (11 , 12, 13, 14) comprises at least one separator web (11 , 13), preferably being formed at least partially from one or two separator web(s) (11 , 13).

5. Method according to one or more of claims 1 to 4, characterized in that the winding element (17) is transverse or longitudinal to the transport direction (T) of the material webs (11 , 12, 13, 14) on the surface (18) at least one of the material webs (11 , 12, 13, 14) is arranged, preferably fixed.

6. Method according to one or more of claims 1 to 5, characterized in that the winding element (17) remains stationary in the material web winding (16).

7. Method according to one or more of claims 1 to 6, characterized in that the material webs (11 , 12, 13, 14) are continuous webs for the production of a plurality of wound energy cells (15).

8. Method according to one or more of claims 1 to 7, characterized in that at least one of the material webs (11 , 12, 13, 14) is cut transversely and / or longitudinally to the transport direction (T) of the material webs (11 , 12, 13, 14) by means of at least one cutting device (21), preferably before and / or after the winding element (17).

9. Method according to claim 8, characterized in that the transport element (22) is drum-shaped and configured to transport the material webs (11, 12, 13, 14) at least partially along the circumference by means of the transport element (22), wherein the material webs (11, 12, 13, 14) are transported via a winding element (17) arranged on the circumference of the transport element (22) for the arrangement of the winding element (17) on the material webs (11, 12, 13, 14).

10. Method according to one or more of claims 1 to 9, characterized in that the winding element (17) is fixed on at least one surface (18) of the material webs (11 , 12, 13, 14) to be wound around the winding element (17).

11. Method according to one or more of claims 1 to 10, characterized in that the winding element (17) is fed to at least one of the material webs (11 , 12, 13, 14) by means of a drum (23), preferably by means of a drum (23) comprising a counter-position element (24). Method according to one or more of claims 1 to 10, characterized in that the material web winding (16) is wound by means of a winding drum (25), wherein the material webs (11) guided on the winding drum (25) 12, 13, 14) are wound around the winding element (17) by means of a winding counter-position (26). A wound energy cell (15), in particular a cell of a lithium-ion battery, with a material web winding (16) made of at least four material webs (11, 12, 13, 14) wound around a longitudinal axis of the energy cell (15), characterized in that the energy cell (15) is manufactured according to a method according to one or more of the preceding claims. A battery, in particular a lithium-ion battery, characterized in that it comprises energy cells (15) according to claim 13. A device (10) for manufacturing wound energy cells (15) from at least two superimposed material webs (11, 12, 13, 14), comprising at least one feeding device (27) for feeding the material webs (11, 12, 13, 14), a transport device (28) for transporting the material webs (11, 12, 13, 14) in the transport direction (T) through the device (10), wherein the transport device (28) comprises at least one transport element (22), characterized in that a winding device (29) for winding the material webs (11, 12, 13, 14) into a wound material web coil (16) is provided, wherein at least one winding element insertion device (30) is arranged upstream of the winding device (29), which is designed and configured to form a winding element (17) extending in the direction of the longitudinal axis of the energy cell (15) before or during the winding of the material webs (11, 12, 13, 14) in operative connection with at least one surface (18) of the material webs (11, 12, 13, 14) to be wound around the winding element (17). 14) to bring.Device (10) according to claim 15, characterized in that the winding element insertion device (30) is designed and configured to hold the winding element. (17) to form at least one of the material webs (11, 12, 13, 14) from a section (20). Device (10) according to claim 15 or 16, characterized in that the winding element (17) can be arranged transversely or longitudinally to the transport direction (T) of the material webs (11, 12, 13, 14) on the surface (18) of at least one of the material webs (11, 12, 13, 14) by means of the winding element insertion device (30), preferably in a fixed position. Device (10) according to one or more of claims 15 to 17, characterized in that the device (10) further comprises at least one cutting device (21) which is designed and configured to cut the material webs (11 , 12, 13, 14) transversely or longitudinally to the transport direction (T), preferably arranged before and / or after the winding element insertion device (30).Device (10) according to one or more of claims 15 to 18, characterized in that at least one of the transport elements (22) is designed and configured as the winding element insertion device (30) to arrange the winding element (17) during the transport of the material webs (11 , 12, 13, 14) on at least one surface (18) of the material webs (11 , 12, 13, 14) to be wound around the winding element (17) transversely or longitudinally to the transport direction (T) of the material webs (11 , 12, 13, 14), preferably fixedly.Device (10) according to claim 19, characterized in that the transport element (22) is drum-shaped and configured to transport the material webs (11, 12, 13, 14) at least partially along its circumference by means of the transport element (22), wherein the material webs (11, 12, 13, 14) can be transported via a winding element (17) arranged on the circumference of the transport element (22) in a recess (31) for the purpose of positioning the winding element (17) on the material webs (11, 12, 13, 14). Device (10) according to one or more of claims 15 to 20, characterized in that the winding element insertion device (30) is designed and configured as a drum (23) having at least one recess (31) to... to receive the winding element (17) and / or transfer it to the material webs (11, 12, 13, 14). Device (10) according to one or more of claims 15 to 21, characterized in that the winding device (29) is designed and configured as a winding drum (25) comprising a winding counter-position (26) to wind the material webs (11, 12, 13, 14) transported on the winding device (29) into the material web coil (16) in operative connection with the winding counter-position (26).

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