WO2023237330A1

WO2023237330A1 - Apparatus and method for producing a wound energy cell

Info

Publication number: WO2023237330A1
Application number: PCT/EP2023/063816
Authority: WO
Inventors: Manfred Folger; Michael Kleine Wächter; Jan Kreysern; Daniel Diedrich; Marcus Wagner; Karsten Meinke; Nils Hofmann; Torsten Mörke
Original assignee: Körber Technologies Gmbh
Priority date: 2022-06-09
Filing date: 2023-05-23
Publication date: 2023-12-14
Also published as: DE102022114556A1

Abstract

The invention relates to an apparatus (10) for producing wound energy cells (17) from at least two material sheets (11, 12, 13, 14) arranged lying one above another, comprising at least one supply device (15) for supplying the material sheets (11, 12, 13, 14), a transport device (19) for transporting the material sheets (11, 12, 13, 14) at least in regions in the transport direction (T) along a transport section through the apparatus (10), wherein the transport device (19) comprises at least one transport element (20), a winding device (21) for winding the material sheets (11, 12, 13, 14) to form a wound material sheet winding (22) in a winding station (23) comprising the winding device (21), which apparatus is characterized in that the winding station (23) comprises a winding zone (24) for forming the material sheet winding (22) in the winding device (21), the winding device being designed and configured to wind the material sheets (11, 12, 13, 14) in the direction of the longitudinal axis of the energy cell (17) by bearing at least in regions against the winding zone (24), wherein the winding zone (24) is substantially formed by at least three winding means (25, 26, 27) operatively connected to one another. The invention further relates to a corresponding method.

Description

Körber Technologies GmbH, Kurt-A. -Körber-Chaussee 8-32, 21033 Hamburg,

Germany

Device and method for producing a wound energy cell

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 at least partially transporting the material webs in the transport direction along a transport section through the device, the transport device comprising at least one transport element , and a winding device for winding the material webs into a wound material web roll in a winding station comprising the winding device.

Furthermore, the invention relates to a method for producing wound energy cells from at least two material webs arranged one above the other, comprising the steps of feeding the material webs by means of at least one feed device, at least partially transporting the material webs in the transport direction along a transport section by means of a transport device comprising a transport element, and winding the material webs to a wound roll of material webs by means of a winding device comprising a winding station.

Devices and methods for producing wound energy cells are known from the prior art. Furthermore, energy cells and batteries produced using such devices and methods are well known. Energy cells or energy storage devices in the sense of the invention are used, for example, in motor vehicles, other land vehicles, ships, aircraft or in stationary systems such as photovoltaic systems in the form of battery cells or fuel cells, in which very large amounts of energy have to be stored over long periods of time. For this purpose, such energy cells regularly have a winding of material webs, which serve as starting materials for such energy cells. When winding energy cells, for example round cells, the winding material is typically selected from four anode, cathode and separator webs of different lengths, which are present, for example, as a film or generally as a material web. In the known methods or devices for producing energy cells Material webs are usually fed separately to a winding core on different paths. To provide the material webs, for example, four separate feeds are required, each to provide a material web in order to then wind it together around 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 with the anodes and cathodes are cut, for example, from an endless web and then wound up with an endless web of separator material in the final winding process. The material webs must regularly have a specific width and length so that an accurately wound energy cell with the intended dimensions can be formed.

The supply of material webs to the winding core cannot take place continuously in the known devices and methods, since the material webs are fed to a quasi-stationary, central winding core. This winding core can usually only be rotated about its longitudinal axis or is rotated about its longitudinal axis in order to wind up the material webs to form an energy cell or wound material webs. After the winding process, the winding core must be removed again from the energy cell or the wound material webs (material web winding) before the winding process of the energy cell or the material web winding in the winding station is completed. This means that there is only a discontinuous manufacturing process for the energy cells and there is also a lot of logistical effort in providing and returning the winding cores. Furthermore, when the winding core is removed from the energy cell or the material web roll, damage or loss of quality to the material webs or the energy cell or the material web roll can occur, which can lead to safety risks or damage to the installed energy storage device.

With the ever-increasing demand for alternative drive concepts, electric drives are becoming more and more the focus of attention. A major challenge here is to provide effective processes for producing the energy storage devices. When winding material webs to form energy cells, there is the problem that the material webs are handled separately and are fed loosely to the winding core one after the other. All railways must be regulated and cannot be transported together. The existing devices and methods require a lot of space during the winding process, and the respective ones can also be used Material webs are only slightly (mechanically) stressed. The material webs must be fed one after the other to the central, quasi-stationary winding core, with the fastest possible production speeds being provided. The material webs usually consist of very thin, flat webs, which tend to lose quality, particularly in the event of compression and torsional stress, which is why there are natural limitations in transport speeds and transport guides. In addition, the material webs regularly slip during the winding process, especially when the winding core is removed, which leads to rejects and loss of quality in the wound energy cells.

Due to the discontinuous process in the production of the material web roll, the processes following the winding cannot be integrated into the manufacturing process of the energy cells in the existing devices and methods, since the removal of the winding core first requires the material web roll to be handled and processed again. This reduces manufacturing speed and increases the risk of damage throughout the manufacturing process.

It is therefore the object of the present invention to provide a device for producing wound energy cells from material webs, energy cells, batteries and a corresponding method for producing wound energy cells, which, on the one hand, ensures continuous production of the energy cells and, on the other hand, a cost-efficient and, if possible, production high production rates should be made possible without this having a negative impact on the quality properties in the production of energy cells.

This object is achieved by the device mentioned at the outset in that the winding station comprises a winding zone for forming the material web roll in the winding device, which is designed and set up to wind the material webs in the direction of the longitudinal axis of the energy cell by at least partially resting against the winding zone, whereby the winding zone is essentially formed by at least three winding means which are operatively connected to one another.

The device according to the invention ensures that the at least two material webs lying one above the other at least in some areas are wrapped by means of the winding insert. direction can be converted into a wound material web roll, in that in the winding zone formed by the at least three winding means, the material webs can be wound into a material web roll by at least partially resting against the winding means. In this way, it is possible for the at least two material webs in the winding zone to be simultaneously wound into a material web roll using the winding means. The at least partial contact of the material webs with the winding zone provides a possibility of bringing the material webs into operative connection with one another through the winding means in order to wind the material webs lying one above the other together accordingly. Preferably, the correspondingly produced material web roll can then be further processed into a wound energy cell. By forming the material web roll in the winding station, the material webs are wound in the winding zone, which ensures continuous production of material web rolls and energy cells. The material webs can be wound up in the winding process by being brought into operative connection with the winding means together with the entire material webs to be wound. During the winding process, the material webs to be wound can be arranged within the winding zone and can preferably be pulled and moved during feeding and fed together to the winding process “as one material web”. The winding station with a central winding zone reduces the number of feeds and/or transport devices required during the winding process, which enables faster and more flexible production of energy cells. The material webs to be wound can also be transported more flexibly and wound using the at least three winding means, whereby an increased number of windings and geometries of the energy cells can be produced and the risk of the material webs slipping or breaking is reduced. There is no winding core required for the material web windings, which must be removed after the winding process. After the production of a material web roll, the next winding process of the material webs can be started without delay in the winding station of the winding device, which ensures continuous production of wound energy cells. When producing the material web roll, at least one winding element can preferably be provided, around which the at least two material webs in the winding zone can be wound into a material web roll by means of the winding means. Alternatively, it can be provided, for example, that a winding start or a winding element can be produced from at least one of the material webs, around which the at least two material webs in the winding zone can be wound into a material web roll by means of the winding means. The The start of the winding can be generated, for example, by means of an engagement element projecting into the winding station, in particular into the winding zone, and/or by means of a structured surface. Alternatively or additionally, at least one of the material webs can be brought into operative connection by means of an engagement element projecting into the winding station, in particular into the winding zone, and/or by means of a structured surface in order to begin the winding process. Further preferably, the engagement element and/or the structured surface is a region or an element of at least one of the winding means. The structured surface can be designed and set up, for example, as an elevation or as a depression, in particular a groove or recess.

The operatively connected at least three winding means of the winding zone provide the function that the material webs can be wound with at least one of the winding means in an at least partial system, the winding means being designed and set up in relation to one another in such a way that they wrap the material webs around the longitudinal axis of the winding means wind up the wrapping material web roll. For this purpose, the winding means are preferably designed and set up dynamically relative to one another in order to provide a change in the winding zone, which can preferably be adapted to the desired contour of the material web winding in the course of the winding. In further preferred embodiments, it may be useful for further additives and/or auxiliary materials to be introduced onto at least one surface of the material webs to be wound around the winding element during winding in order to fix the material webs together at least in certain areas. Fixation can be advantageous, for example, for transporting the material webs within a device, a machine or a system complex. Such winding process systems can preferably include further means and/or elements in order to support and/or design and set up an introduction of additives and/or auxiliary materials and/or a subsequent winding.

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, among other things, as a separator web, separator material web or separator film. More preferably, at least one further material web is formed from an anode web or cathode web, which are also referred to as anode or cathode, anode material web or cathode material web, anode film or cathode film, etc. Preferably, the at least two material webs comprise two separator material paths. Preferably, the beginning of the winding can be produced within the winding zone from at least one separator material web, in that the material webs provided comprise at least a first section of material webs which consist of at least one separator material web. To produce a winding start, the separator material webs within the winding zone can be brought into operative connection with at least one winding means, whereby the at least one separator material web can be produced to a winding start, around which the at least two material webs in the winding zone can be wound into a material web roll by means of the winding means.

For the purposes of the invention, it is not necessary that only two material webs are provided for producing 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. In addition, further materials or processing steps can preferably be added to the material web roll in order to form the energy cell. When the material webs are arranged one above the other, it is not essential that all the material webs lie on top of one another over the entire period of transport. In the sense of the invention, lying one above the other means that the material webs are arranged one above the other at least in sections. For the purposes of the invention, lying one above the other can therefore mean that the material webs are arranged at a distance or essentially one above the other with no gap, with a substantially congruent arrangement of the material webs being further preferably provided. If the material webs are arranged at a distance, they can preferably be transported at least partially by means of independent means of transport; if they are arranged without a distance, the material webs can preferably be transported using a single means of transport. In the case of several material webs, it is therefore conceivable that one of the material webs is arranged only for a certain section on another material web; it is preferably conceivable that an anode or cathode material web can each be arranged completely on a separator material web and/or is covered by a separator material web.

The inventive concept also includes devices whose width is adjusted in such a way that a plurality or plurality of material webs can be accommodated at the same time can be produced parallel to material web wraps. Such devices according to the invention are preferably designed and set up to be variable, in particular in terms of the (machine) width, so that several material webs can be transported next to one another or in parallel by means of the transport device. With a single device, a plurality or plurality of at least two material webs can be wound into corresponding material web rolls using the winding device. In other words, a plurality of material webs are processed in parallel on a device by adjusting the width of the device components accordingly in order to provide a parallel winding in the direction of the longitudinal axis of the energy cell by at least partially resting against the winding zone. For this purpose, the intended facilities, stations and the respective means must be adapted accordingly in order to provide scalability across the board.

A preferred embodiment is characterized in that at least one of the winding means is designed and set up to be changeable in its arrangement such that the winding zone can be increased and/or reduced in the course of winding the material webs. Due to the changeability of the winding zone, the winding means can be used to directly influence the winding process, in that a degree of freedom of at least one of the winding means changes the dynamics during winding. In this way, for example, a movement pattern can be entered onto the material webs to be wound, which can be achieved, for example. B. results in a change in position. Due to the changeability of the arrangement of at least one of the winding means, a change of location of the winding during the winding process within the winding zone can be generated, whereby the winding of the material web roll to be produced is designed and set up to be variable along the winding station, for example a change of position within the winding device can be provided. In addition, the winding zone, which is designed and set up to be enlargeable and/or reduced, can in particular control the intensity of the winding in order to form and set up a looser and/or a more tensioned winding on the one hand. Furthermore, due to the changeability of at least one of the winding means, the potential winding space can be changed in such a way that the winding zone can be successively enlarged in the course of the winding when at least one material web is installed in order to form and set up a sufficiently large area during the winding process. After the appropriate winding, the winding zone can preferably be reduced again, in particular by moving the winding means/s together in order to then start a new winding process with the subsequent material webs. In According to a further preferred embodiment, at least one of the winding means can be changed in the arrangement when at least one material web is applied, preferably the distance of at least one of the winding means from the at least one material web can be reduced so that the extent of the winding zone can be reduced in order to produce a start of winding , which can also be referred to as a winding element around which the material webs can be wound to form a material web roll. Further preferably, the dimensions, the materials and the dimensions of the winding means and/or the winding zone are selected depending on the thickness or length of the roll of material web to be wound or the intended diameter or the intensity of the winding of the roll of material web. The number of winding revolutions in the winding zone is preferably known in advance from the length of the material web, which means that the winding means allows targeted stopping and/or transfer to another unit with a defined seam position of the last outer wrapping of the material web roll.

An advantageous development is characterized in that at least two of the winding means have a contact surface extending in a longitudinal axis for at least partial contact with the material webs, the contact surface corresponding to at least the length of the longitudinal axis of the material web roll to be wound. On the one hand, the contact surface can serve as a support function during the winding process and, on the other hand, it can be designed and set up to initiate the winding process. Preferably, all winding means correspond in their longitudinal extent at least to the length of the longitudinal axis of the material web rolls to be wound; more preferably, the longitudinal dimensions of the longitudinal axis of the winding means are larger than the material web rolls to be wound or larger than the width of the material webs. In preferred embodiments, the contact surface can be designed to be static or stationary or dynamic or movable. It can also be provided that the contact surfaces of the winding means can be locked, for example in order to form and set up a static counter-position.

In a further advantageous embodiment of the invention, at least two of the winding means are rotatably mounted, preferably designed and set up to be drivable. Due to the rotatably mounted winding means, the material webs or the generated start of the winding or a winding element can be rotated or can be rotated by the winding means to produce the material web winding, whereby the winding process can be generated. It is particularly advantageous if at least one of the winding means designed to be drivable and set up to carry out an intended winding. Preferably, all winding means are designed and set up to be rotatable or drivable, which can be controlled and/or regulated if necessary by means of a preferred control and/or regulation unit. The winding means designed to be rotatable or drivable make it possible, for example, to influence the winding speed, the winding intensity and/or the winding location. Due to the controlled and/or regulated rotatability of the winding means(s), the number of winding revolutions during the winding process can be predetermined, in particular depending on a previously known material web length. The winding process can therefore be planned and designed and set up to be changed depending on the desired material web winding.

An expedient embodiment of the invention is characterized in that the at least three winding means are arranged to be movable relative to one another in such a way that the spacing of at least one of the three winding means from the other winding means can be increased in the course of winding in order to expand the winding zone. In this way, during the winding process, the winding zone can be adapted according to the intended production of the material web winding. During the winding process, the wound material webs undergo a change in diameter within the winding station, so that the winding zone usually has to be enlarged. If necessary, it is therefore necessary that at least one of the winding means is designed and set up to be evasive. The winding means are preferably designed to be movable against a spring force and are set up to provide automatic spacing when force is applied by the winding produced. More preferably, at least two of the winding means are designed and set up to be rotatable.

According to a further preferred embodiment of the invention, at least two of the winding means can be moved substantially correspondingly to one another during winding along the transport section, with at least one of the winding means being changeable in such a way that the winding zone can be expanded. When winding, it is necessary that a uniform material web winding can be produced, which can be supported, for example, by at least two corresponding winding means. These can, for example, support the material web roll during winding or accommodate the start of the roll or the winding elements in order to produce a uniform winding. The wrapping agent used to expand the Winding zone is provided, preferably not one of the correspondingly movable winding means. “Correspondingly” movable means, on the one hand, that they can be driven at essentially the same speed and/or are designed and set up to be movable outwards or inwards at the same distance from the center of the winding zone. “Corresponding” includes minor deviations in the movement or arrangement of the winding means. The expansion of the corresponding winding means can be formed, for example, by means of a cam control, with a defined distance between the respective winding means and an enlargement of the winding zone being possible.

A further expedient embodiment of the invention is characterized in that at least one of the winding means is designed and set up as a winding support element, the material webs being able to be wound between the at least two winding means and the winding support element. The winding counter element is designed and set up in conjunction with the winding means for producing the material web roll by winding the material webs. The material webs are wound by the winding means in contact with the winding counter element in the direction of the longitudinal axis of the energy cell, whereby, among other things, a corresponding material web roll can be produced depending on a predetermined or intended length of the material webs. The material webs can be fed in intended lengths and/or widths in order to produce a corresponding material web roll of a predetermined length of the material webs. The winding means and/or the winding support element can be controllable 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 means and/or the winding counter element, for example the temperature supply, (pressure) pressures, transport speeds, etc. The winding counter element can in principle be formed from any suitable material and/or shape. The winding counter element can, for example, comprise a conveyor belt and/or one or more rollers, drums, rollers or generally rotating bodies. In addition, it may be useful for the winding counter element to be designed and set up to be drivable or rigid and, alternatively or additionally, to be evasive against a spring force. Further preferred is the configuration, the design and/or the by means of the winding counter element Winding speed of the material web roll to be wound is designed and set up to be adjustable, controllable and / or regulatable.

A preferred development of the invention is characterized in that the at least three winding means are designed and set up as two rotating winding rods arranged essentially parallel to one another and as the winding counter element. The rotating winding rods arranged essentially parallel to one another in conjunction with the winding counter element provide a reliable way to produce the material web windings evenly in the winding zone. For this purpose, the winding rods and the winding counter element are preferably designed to be drivable and controlled and/or regulated essentially synchronously with one another. In preferred embodiments, the winding counter element can be designed and set up as a driven conveyor belt/transport belt or as a driven drum. The winding means are designed and set up relative to one another in such a way that they increase the distance from one another during winding in order to expand the winding zone. For this purpose, the positions of the winding rods and/or the winding counter element can/can preferably be designed and set up in a cam-controlled manner or the corresponding component(s) can/can be arranged on a cam-controlled body. More preferably, each of the winding means can change its distance from the center of the winding zone individually, or in pairs or all three together, with the same or different changes in distance. In this way, it is possible for the center of the winding to be freely and variably changed, whereby desired winding geometries and winding locations can be generated. In a further preferred embodiment, at least one of the winding means or the winding rods can be designed and set up with an electric drive and/or contact or contactless signal and power transmission. Thus, different winding geometries or characteristics can be produced in a single winding station, with an individual winding zone corresponding to the intended winding being able to be formed and set up.

In an advantageous embodiment, at least one of the two rotating winding rods and/or the gap occurring between the two winding rods is designed to be pressurized at least in some areas and is set up to bring at least one of the material webs, the material web roll or a winding element into engagement with at least one of the winding rod and/ or to keep. The suppression can be provided, for example, in the form of a vacuum. Further ahead At least one of the two winding rods is designed to be rotatable and is set up to wind up at least one material web or a winding element arranged between the two winding rods with the material webs by rotating “against” the vacuum to form the material web winding. In this way, the winding counter element may become obsolete or may only be required as a guide element in order to produce a roll of material web.

An expedient embodiment of the invention is characterized in that the transport element is designed and set up as a rotatably driven rotating body. The rotating body can transport the material webs directly or include a transport layer for transporting the material webs. At least one of the winding means, which can be rotated in the direction of rotation of the rotating body, is preferably arranged on the rotating body. The winding means or winding means is/are more preferably also rotatably arranged on the rotating body. The rotating body offers the advantage that further transport of the material webs is preferably formed and set up automatically during winding, whereby a continuous manufacturing process of the energy cells can be generated. The production of the material web roll can preferably be carried out in a maximum of one revolution of the rotating body. In preferred embodiments, all of the winding means required for a winding zone are attached to the rotating body and are designed and set up to be transportable along the circumference of the rotating body. In this way, the material webs are simultaneously transported through the rotating body and produced into a material web roll in the winding zone formed by the winding means. The correspondingly generated material web roll can then be delivered without interruption, whereby a new winding process can be carried out using the winding means. In further preferred embodiments, it may be useful for a single rotating body to comprise a plurality or plurality of winding means for the parallel or successive production of material web windings. The rotatably driven rotating body is preferably designed and set up as a rotatably driven drum.

An advantageous development is characterized in that at least two winding means or the winding counter element are/is arranged on the circumference of the rotatably driven rotating body. In a preferred development of the invention, the winding counter and/or the rotary body has a coated surface at least in some areas, the coated surface being provided in particular to form different sliding properties of at least one of the material webs on the winding counter and/or on the rotary body. The coated surface can in particular be designed and set up to improve the sliding of at least one of the material webs and/or the material web roll, that is to say to reduce the frictional force, or to reduce the sliding of at least one of the material webs and/or the material web roll, that is to say the to increase friction force.

A further preferred embodiment is characterized in that the rotatably driven rotating body includes/comprises at least one rotatable carrier element for arranging the at least two winding means and/or the winding counter-support element. The rotatable carrier element is preferably connected in a stationary manner to the rotating body, the rotatability of the carrier element being able to be achieved by the rotation of the rotating body. Preferably, the winding means and the winding counter element are designed to be movable along the carrier element and are set up to provide the changeability of the winding zone.

In a preferred development of the invention, the winding counter element is designed and set up as a flat winding track, the winding zone being able to be formed along the winding track in conjunction with the winding means. The winding track is, for example, at least one driven or drivable conveyor belt in order to provide a change in position of the material webs or the material web roll during the winding process. The winding track is further preferably a band system made up of several bands, which are designed to be flat over the entire surface or only in partial areas in which the winding process can be generated. To drive and/or support the winding track, at least two winding track elements can be provided, which are designed and set up in particular to generate a band tension and/or to allow the winding zone to be evaded/changed during the winding process.

An expedient embodiment of the invention is characterized in that the device further comprises at least one cutting device which is designed and set up to cut at least one of the material webs and/or the material web roll transversely or longitudinally to the transport direction, preferably in front of and/or arranged after the winding device. The at least one cutting device makes it possible to cut at least one or each of the material webs and/or the material web roll. The cutting devices are preferably provided for cutting endless webs to length; alternatively or additionally, the cutting devices can be provided to cut the material web roll formed in a predetermined length, width and/or shape. The cutting device provides a wider range of applications for the device, for example by allowing wider material webs to be cut into narrower material webs with the desired dimensions. In addition, material webs can be cut according to a specified cut. More preferably, a different cutting pattern can alternatively or additionally be carried out by means of the cutting device, for example special recesses, conductor tracks or specific further cut images. The cutting devices can be designed and set up, for example, by 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 can be designed and set up to carry out the cutting process. Alternatively or additionally, the at least one cutting device can cut a winding element to be arranged on the at least one surface before and/or after the arrangement on the material web according to a predetermined length, width and/or shape.

A further development is characterized in that at least one of the winding means is designed to be able to withstand temperatures and/or pressure at least in some areas and is set up to apply a temperature and/or pressure to the material webs or the material web roll in the winding zone at least in some areas. In this way, for example, it is possible to laminate the material webs and/or the material web roll in order to connect them to one another at least in some areas. Alternatively or additionally, a device for introducing auxiliary and/or additives can be provided, for example in order to form and set up a reversible or irreversible connection of the material webs and/or the material web roll. A further preferred embodiment of the invention is characterized in that at least one winding element insertion device is arranged upstream of the winding device, which is designed and set up to have a winding element extending in the direction of the longitudinal axis of the energy cell in operative connection with at least one surface before or with the winding of the material webs of the material webs to be wrapped around the winding element. In a further preferred embodiment, the winding element insertion device comprises at least one trough for receiving a winding element. The trough can generally be viewed as a contour and generally includes a corresponding recess for arranging at least one winding element, a material web roll and/or at least one material web. Preferably, the winding element introduction device has a plurality or plurality of troughs in order to accommodate a corresponding number of winding elements and to transfer them to the material webs. To secure the winding elements, further means and/or properties can preferably be provided, for example an application of negative pressure, in order to hold the winding element and/or the material web roll, at least if necessary. Preferably, the 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, whereby the material webs do not have to be fed together to the winding process during winding, but rather the connection of the winding element with at least one surface of the material webs and the subsequent winding can take place locally separately from one another. In other words, the process of winding the material webs is not tied to the provision of the winding element. The winding means can further preferably provide a dual function when introducing the winding element and during winding, in that the winding element can be fed to at least one, preferably two winding means, more preferably two winding means arranged on the rotating body, in order to bring at least one of the material webs into operative connection with the winding element and then to form and set up the winding using the winding means(s) within the winding zone. If the winding element introduction device is separated from the winding device, the material webs provided with the winding element can preferably be wound using the winding means provided for this purpose. By introducing a winding element and producing a roll of material web containing a winding element, different options are available for using a winding element, which, by preferentially remaining in the roll of material web, provides different additional functions in the energy cell. can form. Such winding elements are alternatively referred to as winding core, auxiliary core or auxiliary element. The material of the winding element is not relevant to the invention and in principle all 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 provided 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 cell chemistry of the energy cell that may be preferred. In this way, 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 set up, for example, as a storage medium for this purpose. The winding element is preferably designed and designed to be porous. Furthermore, the winding element can provide a support function for the material webs to be wound, whereby better mechanical properties of the energy cell can be provided. In addition, it may be useful for the winding element to no longer be separated from the material web roll after winding, thereby minimizing the risk of damage or loss of quality to the energy cell. The winding element is preferably applied to the topmost material web of the material webs to be wound. Alternatively, the winding element can be applied, for example, to two of the material webs. The operative connection of the winding element with at least one surface is further preferably carried out 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 to the winding process “as one material web”. 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.

The operative connection of the winding element to at least one surface of the material webs is preferably irreversible, so that the winding element is firmly connected to one another with at least one material web. In further preferred embodiments, it may be useful for the winding element to be reversibly inserted 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 the device, a machine or a system complex. Such winding process systems can be preferred wise further means and / or elements to support and / or design and set up an introduction of the winding element and / or a subsequent winding.

In a further advantageous embodiment of the invention, at least one dispensing device designed and set up to dispense the material web rolls is arranged downstream of the winding device. The delivery device takes over the rolls of material webs from the winding device or the transport device in order to enable continuous production of energy cells. The dispensing device is further preferably designed and set up in such a way that it receives a roll of material web generated by the winding device or that a dispensed roll of material web can be received by the dispensing device. The delivery device is preferably arranged after the winding station or the transport device, in particular after the rotating body. By means of the dispensing device, an adhesive agent can further preferably be applied to and/or onto the roll of material web in order to secure the roll of material web in a substantially dimensionally stable manner, at least temporarily. The adhesive can be, for example, an adhesive strip.

The object is also achieved by the method according to the invention in that the material web roll is wound in a winding zone of the winding station, the material webs being wound in the direction of the longitudinal axis of the energy cell by at least partial contact with the winding zone, the winding zone essentially being connected to one another by at least three operatively connected winding means is formed. The method according to the invention ensures that the at least two material webs are reliably and uniformly wound into a material web roll. By producing a material web winding by placing the at least two material webs against the winding zone, it is possible, for example, for the transport of the material webs to be separated from the winding, so that the energy cells can be produced in a continuous process. The material web rolls are wound by the winding means in a winding zone provided for this purpose. The material webs can be fed continuously in this way, whereby the production of the material web rolls can also be produced continuously. The material webs provided one above the other are fed centrally to the winding zone, so that no separate handling of the material webs to be wound around a fixed winding core is necessary. The winding zone can preferably be designed to be dynamic. The winding is carried out by the winding means The material web roll to be produced is preferably driven during the winding process by at least one of the winding means. The at least partial contact of the material webs with the winding zone provides a possibility of bringing the material webs into operative connection with one another through the winding means in order to wind the material webs lying one above the other together accordingly. By forming the material web roll in the winding station, the material webs are wound in the winding zone, which ensures continuous production of material web rolls and energy cells. The material webs can be wound up in the winding process by being brought into operative connection with the winding means together with the entire material webs to be wound. During the winding process, the material webs to be wound are arranged within the winding zone and can preferably be pulled and moved during feeding and fed together to the winding process “as one material web”. Since the material webs are preferably fed together to the winding station with a central winding zone, the required number of feeds and/or transport devices is reduced during the winding process, which results in faster and more flexible production of energy cells. The material webs to be wound can also be transported more flexibly and wound using the at least three winding means, whereby an increased number of windings and geometries of the energy cells can be produced and the risk of the material webs slipping or breaking is reduced. There is no winding core required for the material web windings, which must be removed after the winding process. After the production of a material web roll, the next winding process of the material webs can be started without delay in the winding station of the winding device, which ensures continuous production of wound energy cells. When producing the material web roll, a winding element can preferably be provided around which the at least two material webs in the winding zone are wound to form a material web roll by means of the winding means. Alternatively, it can be provided, for example, that a winding start or a winding element can be produced from at least one of the material webs, around which the at least two material webs are wound in the winding zone by means of the winding means to form a material web roll. The start of the winding can be generated, for example, by means of an engagement element projecting into the winding station, in particular into the winding zone, and/or by means of a structured surface. Alternatively or additionally, at least one of the material webs can be connected in this way by means of an engagement element projecting into the winding station, in particular into the winding zone and/or brought into operative connection by means of a structured surface in order to begin the winding process. Further preferably, the engagement element and/or the structured surface is a region or an element of at least one of the winding means. The structured surface can be designed and set up, for example, as an elevation or as a depression, in particular a groove or recess.

In order to avoid repetition, in connection with the method according to the invention, reference is made in particular to the advantages already described in detail in connection with the device according to the invention. These also apply in an analogous manner to the method according to the invention specified below.

A further development is characterized in that at least one of the winding means is changed in its arrangement during winding in such a way that the winding zone is enlarged and/or reduced in the course of winding the material webs.

In a further advantageous embodiment of the invention, the at least three winding means are moved relative to one another in such a way that the spacing of at least one of the three winding means from the other winding means is increased in the course of winding in order to expand the winding zone.

An expedient embodiment of the invention is characterized in that at least one of the winding means is designed and set up as a winding support element, the material webs being wound between the at least two winding means and the winding support element.

A further preferred embodiment of the invention is characterized in that the transport element is designed and set up as a rotatably driven rotating body, with at least two winding means or the winding counter element being arranged on the circumference of the rotatably driven rotating body in order to transport the material webs by means of the To bring the rotating body into operative connection with the two winding means or with the winding counter element.

A preferred development of the invention is characterized in that the winding support element is designed and set up as a flat winding track, wherein the material web roll is formed in the winding zone in connection with the winding means along the winding path.

A further expedient embodiment of the invention is characterized in that at least one of the material webs and/or the material web rolls is/are cut transversely and/or longitudinally to the transport direction by means of a cutting device, preferably arranged before and/or after the winding device.

A preferred development of the invention is characterized in that the material webs or the material web roll are/are subjected to at least partial temperature control and/or pressure loading in the winding zone by means of at least one winding means.

An advantageous development is characterized in that before or with the winding of the material webs, a winding element extending in the direction of the longitudinal axis of the energy cell is brought into operative connection with at least one surface of the material webs to be wound around the winding element by means of at least one winding element introduction device upstream of the winding device.

A further preferred embodiment is characterized in that the material web roll is delivered from the winding device by means of at least one delivery device arranged downstream of the winding device.

Further useful and/or advantageous features and developments as well as preferred device objects result from the subclaims 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. Shown in the drawings:

1 shows a schematic representation of a first embodiment of a device according to the invention in cross section,

2 shows a detailed view of winding means of a device according to the invention, 3 shows a schematic representation of a second embodiment of a device according to the invention in cross section,

4 shows a schematic representation of a third embodiment of a device according to the invention in cross section,

5 shows a schematic representation of a fourth embodiment of a device according to the invention in cross section and

Fig. 6 is a schematic representation of a fifth embodiment of a device according to the invention in cross section.

The device according to the invention and the method according to the invention are described in more detail using the aforementioned figures.

The devices 10 shown in the drawings are designed and set up as an independent and separate device 10 as an example. However, the invention relates in the same way to a comparable device 10, which is integrated in a more complex system with several assemblies or upstream and/or downstream further device or machine components. Such devices 10 can be designed and set up to be variable, in particular in terms of the (machine) width, so that several material webs 11, 12, 13, 14 can be processed in parallel using the device 10. In other words, a plurality or number of material webs 11, 12, 13, 14 can be processed in parallel on a device 10 by adjusting the width of the device components accordingly. For this purpose, the intended facilities and the respective means must be adapted accordingly in order to provide broad scalability.

The intended material webs 11, 12, 13, 14 are preferably produced in a manufacturing machine, which can include a device 10 according to the invention and/or which a device 10 according to the invention is arranged downstream. Such a manufacturing machine - not shown in the figures - preferably includes different steps in order to produce the corresponding material webs 11, 12, 13, 14 with the intended properties for producing a wound energy cell 17 generate. The material webs 11, 12, 13, 14 are generally provided as endless webs 16 and can already be pre-cut in the intended lengths and/or widths. In an upstream device or in upstream processing steps, the material webs 11, 12, 13, 14 can also preferably be connectable to one another at least in some areas to form a material web composite. The material webs 11, 12, 13, 14 are preferably selected from two separator material webs 11, 13 and one anode material web 12 and one cathode material web 14.

1 and 3 to 6 each show schematically a different embodiment of a device 10 according to the invention. The device 10 is used to produce wound energy cells 17 from at least two material webs 11, 12, 13, 14 arranged one above the other. The material webs 11, 12, 13, 14 can be fed to the device 10 at least in areas lying one above the other by means of at least one feed device 15, with only one feed device 15 being shown in the illustrated embodiments. In the sense of the invention, the material webs 11, 12, 13, 14 can also be transported one above the other at a (slight) distance. Preferably, the at least two material webs 11, 12, 13, 14 can be present as a material web composite that is connected at least in some areas. Alternatively, the at least two material webs 11, 12, 13, 14 can be connected at least in some areas to form a material web composite before winding. The material web composite is preferably produced before or during winding. The material webs 11, 12, 13, 14 arranged one above the other are each shown as an example as a single material web 11, 12, 13, 14, the material webs 11, 12, 13, 14 arranged one above the other having at least one surface 18. The surface 18 of the material webs 11, 12, 13, 14 is not limited to the top, but can also be arranged on the underside of the material webs 11, 12, 13, 14. Surface 18 basically means all of the free surfaces of the material webs 11, 12, 13, 14. The device 10 comprises a transport device 19 for at least partially transporting the material webs 11, 12, 13, 14 in the transport direction T along a transport section through the device 10, the transport device 19 comprising at least one transport element 20. The device 10 further comprises a winding device 21 for winding the material webs 11, 12, 13, 14 into a wound material web roll 22 in a winding station 23 comprising the winding device 21. The device 10 is characterized according to the invention in that the winding station 23 includes a winding zone 24 for forming the material web roll 22 in the winding device 21, which is designed and set up to pass the material webs 11, 12, 13, 14 in the direction of the longitudinal axis of the energy cell 17 to wind at least partially in contact with the winding zone 24, the winding zone 24 being essentially formed by at least three winding means 25, 26, 27 which are operatively connected to one another. 2 shows an example of a detailed view of a winding station 23 with three winding means 25, 26, 27, which form the winding zone 24. In the winding zone 24, the material webs 11, 12, 13, 14 shown in detail lie on one of the winding means 27 in contact with the winding zone 24, whereby a winding can be carried out. The preferred ability to change position and rotate the winding means 25, 25, 27 is indicated by the corresponding arrows in FIG. In the preferred embodiment shown, the winding means 25, 26, 27 are rotatable in both directions 28 and are designed and set up to be positionally movable 29 in the respective arrangement relative to the center of the winding zone 24. In further preferred embodiments, only one of the winding means 25, 26, 27, two, three or all of the winding means can be rotatable 28 and/or positionally movable 29. In Fig. 2, the winding means 25, 26, 27 are shown as examples of rotationally symmetrical bodies, in particular rollers, drums, rods. For the purposes of the invention, however, it is not necessary for the winding means 25, 26, 27 to have such a design. It is only necessary that a material web roll 22 can be produced when the material webs 11, 12, 13, 14 are in contact with the winding means 25, 26, 27 at least in some areas. In an advantageous embodiment shown in FIGS. 1 to 6, at least one of the winding means 25, 26, 27 is designed and set up to be changeable in its arrangement in such a way that the winding zone 24 in the course of winding the material webs 11, 12, 13 , 14 can be increased and/or reduced. In FIGS. 1, 2 and 6, the winding means 25, 26, 27 are each marked with arrows 29 to show the changeability of the arrangement relative to one another. By changing the arrangement of at least one of the winding means 25, 26, 27 in relation to the other winding means 25, 26, 27, the winding zone 24 can be increased or reduced accordingly. Due to the changeability of the winding zone 24, a direct influence on the material webs 11, 12, 13, 14 or the material web roll 22 can be exerted by means of the winding means 25, 26, 27.

In FIGS. 1 and 3 to 6, the embodiments of the device 10 are shown in cross section and, as an example, on the feed device 15 and on the Transport device 19 each shows a material web 11, 12, 13, 14. When used as intended, on such devices 10, a plurality or number of material webs 11, 12, 13, 14 can be transported simultaneously, that is, for example next to one another, within the device 10 and by means of the at least one winding device 21 to form a material web winding 22 and to an energy cell 17 be producible. For this purpose, the corresponding device components are preferably adapted in width so that a substantially parallel production of energy cells 17 can be carried out.

For the sake of simplicity, the windings in the material web windings 22 and in the energy cells 17 are shown schematically in the figures as concentric circles arranged one above the other. A corresponding winding of concentric material webs 11, 12, 13, 14 arranged one above the other would, when used as intended, appear spiral-shaped in cross-section or without closed circular segments.

In an advantageous embodiment, at least two of the winding means 25, 26 have a contact surface 30 extending in a longitudinal axis for at least partial contact with the material webs 11, 12, 13, 14, the contact surface 30 being at least the length of the longitudinal axis of the material web roll 22 to be wound corresponds. In a further preferred embodiment, at least two of the winding means 25, 26, 27 are rotatably mounted, preferably designed and set up to be drivable. In Fig. 2, in the schematic detailed view of the winding device 21, the winding means 25, 26, 27 are designed as rotatable winding means with a substantially round cross section. The contact surface 30 is dynamic in this case due to the rotatable winding means 25, 26, 27 and extends over the entire circumference of the corresponding winding means 25, 26, 27, with one contact being made in each case with the material webs 11, 12, 13, 14 during winding is provided. As in FIGS. 3 and 4, a flat element can also serve as a contact surface 30 in order to come into contact with the material webs 11, 12, 13, 14 at least in some areas.

2 shows as an example that preferably the at least three winding means 25, 26, 27 are arranged to be movable 29 relative to one another in such a way that the spacing 29 of at least one of the three winding means 25, 26, 27 to the further winding means 25, 26 , 27 can be enlarged in the course of winding in order to expand the winding zone 24. Due to the mutually movable 29 arrangement at least one of the Winding means 25, 26, 27, the winding zone 24 can be expanded during winding in order to securely arrange the material web roll 22 and wind it up accordingly. In a preferred embodiment, at least two of the winding means 25, 26 can be moved substantially correspondingly to one another during winding along the transport section, with at least one of the winding means 25, 26, 27 being changeable in such a way that the winding zone 24 can be expanded. By means of the two winding means 25, 26 shown in FIGS. 1 to 6, which are preferably rotatably mounted and more preferably designed and set up to be drivable, the material web winding 22 can be wound up and arranged evenly at least by resting on the two winding means 25, 26 . The two winding means 25, 26 are in particular designed and set up to hold the material web roll 22 and/or the material webs 11, 12, 13, 14 in sections, for example by applying negative pressure.

In preferred embodiments, at least one of the winding means 25, 26, 27 is designed and set up as a winding support element 31, with the material webs 11, 12, 13, 14 being able to be wound between the at least two winding means 25, 26 and the winding support element 31. In Figures 1, 2, 5 and 6, the winding support element 31 is designed as a body with a substantially round cross section, while the winding support element 31 of the device 10 in the embodiments of Figures 3 and 4 is designed as a body flat element is formed. In principle, the design of the winding support element 31 in relation to the winding is not relevant to the invention, provided that a support can be provided during the winding process. The winding counter element 31 forms a corresponding stability during winding in order to support the material web roll 22 by contacting the winding means 25, 26, 27 provided for the winding and to form it according to the intended shape. The at least three winding means 25, 26, 27 are preferably designed and set up as two rotating winding rods 32 arranged essentially parallel to one another and as the winding counter element 31.

The transport element 20 is preferably designed and set up as a rotatably driven rotating body 33. In preferred embodiments, at least two winding means 25, 26 or the winding counter element 31 are arranged on the circumference 34 of the rotatably driven rotating body 33. In FIGS. 1, 3, 4 and 6, two winding means 25, 26 belonging to a winding station 23 are arranged on the circumference of the rotating body 33. In Fig. 4, two times two winding means 25, 26 are arranged, which are connected to the winding counter. element 31 each form and set up the winding station 23 with a resulting winding zone 24. In further preferred embodiments, it can be explicitly provided that a plurality or plurality of winding means 25, 26 or winding counter elements 31 are arranged on the circumference 34 of a rotating body 33, each of which is in operative connection with at least one further winding means 25, 26, 27 or one Winding counter element 31 can be brought to form a winding zone 24, which is designed and set up to form the material web winding 22 in the winding device 21. Alternatively, as shown in the embodiment of FIG. 5, it is possible for the winding counter element 31 to be arranged on the circumference of the rotating body 33, while the further winding means 25, 26 are arranged on a further arrangement or device - not shown in detail in the figures Engagement with the winding counter element 31 to form the winding zone 24 can be brought.

As shown in the embodiment of FIG , which is more preferably directly connected to the rotating body 33 for rotating in the circumferential direction of the rotating body 33, two winding means 25, 26 and the winding counter element 31 are arranged. If necessary, such a carrier element 35 can also be provided in the embodiments of FIGS. 1 and 5 for arranging at least one winding means 25, 26, 27.

Preferably, the winding counter element 31 is designed and set up as a flat winding track 36, with the winding zone 24 being able to be formed along the winding track 36 in conjunction with the winding means 25, 26, 27. 3 and 4, the winding web 36 is, for example, at least one driven or drivable conveyor belt in order to provide a change in position of the material webs 11, 12, 13, 14 or the material web roll 22 during the winding process. The winding track 36 is further preferably a belt system - not shown in detail in the figures - made up of several belts which are designed to be flat over the entire surface or only in partial areas. To drive and/or support the winding track 36, at least two winding track elements 37 can be provided, which are designed and set up, in particular, to generate a band tension and/or to allow the winding zone 24 to evade/change during the winding process. To carry out the winding process using a winding track 36 in connection With at least two winding means 25, 26, the material webs 11, 12, 13, 14 can be brought into engagement with the at least two winding means 25, 26 by means of the transport device 19, whereby when the material webs 11, 12, 13, 14 engage with the winding web 36 a material web roll 22 can be formed within the winding zone 24 formed by the three winding means 25, 26, 27 and 36, respectively. Transport preferably takes place successively in the transport direction T, which can be generated on the one hand by the rotatable rotating body 33 and by the drivable winding track 36.

In a further advantageous embodiment, the device 10 further comprises at least one cutting device 38, which is designed and set up to cut at least one of the material webs 11, 12, 13, 14 and/or the material web roll 22 transversely or longitudinally to the transport direction T, preferably in front of and / or arranged after the winding device 21. A cutting device 38 is shown schematically in FIGS. 1 and 3 to 6, which is designed and set up for cutting the material webs 11, 12, 13, 14. By means of the cutting devices 38, the material webs 11, 12, 13, 14 can preferably be cut in terms of their length and/or their width. Alternatively or additionally, the material web rolls 22 can also be cut and/or, more preferably, certain cutting patterns of the material webs 11, 12, 13, 14 can be carried out. Preferably, the material webs 11, 12, 13, 14 are cut to length in a predetermined length, which is defined by the subsequent winding, the cutting process and/or the corresponding cutting means. 1 and 3 to 6, the cutting device 38 is further preferably arranged in front of the winding device 21, whereby the endless web 16 can be separated before or after winding in order to ensure continuous production of the energy cells 17.

In further embodiments - not shown in detail in the figures - at least one of the winding means 25, 26, 27 is designed to be able to withstand temperatures and/or pressure at least in some areas and is set up to apply a temperature and/or pressure to the material webs 11 in the winding zone 24 at least in some areas , 12, 13, 14 or the material web wrap 22. For this purpose, the relevant winding means 25, 26, 27 are preferably designed and set up to be heatable and/or coolable. Alternatively or additionally, the relevant winding means 25, 26, 27 can be designed and set up to be movable, for example with an adjustable pressure against the material webs 11, 12, 13, 14 and/or against the material web winding 22. Preferably, at least one winding element introduction device 39 is arranged upstream of the winding device 21, which is designed and set up to have a winding element 40 extending in the direction of the longitudinal axis of the energy cell 17 before or with 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 wrapped around the winding element 40. 4 shows a winding element introduction device 40, which is designed and set up to provide winding elements 40 on at least one surface 18 of the material webs 11, 12, 13, 14. 4, the winding element introduction device 39 is preferably designed and set up as a portion of the transport element 20, which on the one hand transports the material webs 11, 12, 13, 14 and, on the other hand, feeds the winding element during the transport of the material webs 11, 12, 13, 14 to be wound 40 provides.

In preferred embodiments, the winding element 40 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 40 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 fixation of the winding element 40 on at least one surface 18 can particularly preferably be done using glue.

In further advantageous embodiments, at least one dispensing device designed and set up for dispensing the material web rolls 22 - not shown in the figures - is arranged downstream of the winding device 31. The delivery device can be designed and set up, for example, as a gripping arm, conveyor belt, drum, etc.

The procedure is explained in more detail below using the drawing. The method is used to produce wound energy cells 17 from at least two material webs 11, 12, 13, 14 arranged one above the other, comprising the steps of feeding the material webs 11, 12, 13, 14 by means of at least one feed device 15, at least partially transporting the material webs 11, 12 , 13, 14 in the transport direction T along a transport section by means of a transported ment 20 comprising transport device 19, and winding the material webs 11, 12, 13, 14 into a wound material web roll 22 by means of a winding device 21 comprising a winding station 23. In Fig. 1 and Fig. 3 to Fig. 6, corresponding devices 10 are shown Provision of the method according to the invention is shown.

This method is characterized according to the invention in that the material web roll 22 is wound in a winding zone 24 of the winding station 23, the material webs 11, 12, 13, 14 being wound in the direction of the longitudinal axis of the energy cell 17 by at least partially resting against the winding zone 24, wherein the winding zone 24 is essentially formed by at least three winding means 25, 26, 27 which are operatively connected to one another. 2 shows an example of three winding means 25, 26, 27, which are operatively connected to one another in order to jointly form a winding zone 24. In such methods, a plurality or plurality of material webs 11, 12, 13, 14 can preferably be produced simultaneously, that is, for example next to one another, by means of the at least one winding device 21 to form a material web roll 22. The winding device 21 with its winding means 25, 26, 27 is in operative connection with the at least two material webs 11, 12, 13, 14 in order to form the material web winding 22.

Preferably, at least one of the winding means 25, 26, 27 is changed in its arrangement during winding in such a way that the winding zone 24 is enlarged and/or reduced in the course of winding the material webs 11, 12, 13, 14. For this purpose, the at least three winding means 25, 26, 27 can be moved relative to one another in such a way that the spacing of at least one of the three winding means 25, 26, 27 from the further winding means 25, 26, 27 is increased in the course of winding in order to close the winding zone 24 expand. 1 to 6, at least one of the winding means 25, 26, 27 is further preferably designed and set up as a winding counter element 31, with the material webs 11, 12, 13, 14 between the at least two winding means 25, 26 and the winding counter element 31 are wound.

In preferred embodiments, the transport element 20 is designed and set up as a rotatably driven rotating body 33, with at least two winding means 25, 26 or the winding counter element 27, 31 being arranged on the circumference 34 of the rotatably driven rotating body 33 in order to wrap the material webs 11, 12, 13, 14 when transported by means of the rotating body 33 with the two winding means 25, 26 or with the winding counter element 31 to be brought into operative connection. In Fig. 1 and Fig. 2 to Fig. 6, the rotatability of the rotating body 33 is shown using arrows that illustrate the direction of rotation 41 of the rotating body 33. In FIGS. 1, 5 and 6, the direction of rotation 42 of corresponding winding means 25, 26, 27 is also shown with an arrow. The direction of rotation 41 of the rotating body 33 and the corresponding winding means 25, 26, 27 are preferably designed and set up synchronously or correspondingly to one another, so that the winding means 25, 26, 27 of the rotating body 33 and the winding means 25, 26, which are not located on the rotating body 33, 27 can be brought into operative connection with one another. The corresponding winding means 25, 26, 27 therefore have, in particular, a substantially identical rotational speed.

The winding counter element 31 can preferably also be designed and set up as a flat winding web 34, the material web winding 22 being formed in the winding zone 24 in conjunction with the winding means 25, 26 along the winding web 11, 12, 13, 14. Further preferably, the material webs 11, 12, 13, 14 or the material web roll 22 in the winding zone 24 are at least partially tempered and/or subjected to pressure by means of at least one winding means 25, 26, 27. The temperature control or pressure load can produce further properties in the material webs 11, 12, 13, 14 and/or in the material web roll 22, which can be adjusted accordingly by appropriate control/regulation of the duration of the temperature control or pressure load. The material webs 11, 12, 13, 14 are preferably connected to one another at least in some areas before the winding process in order to be fed together to the winding device 21. Sensors (not shown in detail in the figures) can further preferably be provided for the control/regulation, in particular in order to monitor the corresponding parameters and to design and set up the corresponding control/regulation.

In further preferred embodiments, at least one of the material webs 11, 12, 13, 14 and/or the material web roll 22 is/are cut transversely and/or longitudinally to the transport direction T by means of a cutting device 38, preferably arranged before and/or after the winding device 21. A cutting device 38 is shown schematically in FIGS. 1 and 2 to 6, which is designed and set up for cutting the material webs 11, 12, 13, 14. By means of the cutting devices 38, the material webs 11, 12, 13, 14 can preferably be cut in terms of their length and/or their width. Alternatively or additionally, you can also the material web rolls 22 are cut and/or certain cutting patterns of the material webs 11, 12, 13, 14 can also preferably be carried out. Preferably, the material webs 11, 12, 13, 14 are cut to length in a predetermined length, which is defined by the subsequent winding, the cutting process and/or the corresponding cutting means.

In a further preferred embodiment - shown in FIG 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 40. 4 shows an example of the process of providing the winding element 40 to the material webs 11, 12, 13, 14. The material webs 11, 12, 13, 14 are each shown as material webs 11, 12, 13, 14 arranged one above the other. In the sense of the invention, the material webs 11, 12, 13, 14 can also be transported one above the other at a (slight) distance. Preferably, the at least two material webs 11, 12, 13, 14 can be present as a material web composite that is connected at least in some areas. Alternatively, the at least two material webs 11, 12, 13, 14 can be connected at least in some areas to form a material web composite before winding.

Following the winding process, the material web roll 22 is, in preferred embodiments, delivered from the winding device 21 by means of at least one dispensing device arranged downstream of the winding device 21 - not shown in the figures. The delivery device can, for example, be integrated into the transport device 19 and/or connected to the transport device 19, so that a continuous production and delivery process of the material web rolls 22/energy cells 17 is provided.

In a further advantageous embodiment, the dispensing device preferably comprises at least one fixing device - not shown in the figures - which is designed and set up for at least partially fixing the material web roll 22. For this purpose, for example, an adhesive, for example an adhesive strip, a tape or the like, can be applied to at least one surface of the material webs 11, 12, 13, 14 and/or on a surface of the material web roll 22 are introduced/applied in order to prevent undesirable opening/development of the material web roll 22 after winding.

Claims

Device (10) for producing wound energy cells (17) from at least two material webs (11, 12, 13, 14) arranged one above the other, comprising at least one feed device (15) for feeding the material webs (11, 12,

13, 14), a transport device (19) for at least partially transporting the material webs (11, 12, 13, 14) in the transport direction (T) along a transport section through the device (10), the transport device (19) having at least one transport element ( 20) comprises a winding device (21) for winding the material webs (11, 12, 13, 14) into a wound material web roll (22) in a winding station (23) comprising the winding device (21), characterized in that the winding station (23 ) a winding zone (24) for forming the material web roll (22) in the winding device (21), which is designed and set up to roll the material webs (11, 12, 13, 14) in the direction of the longitudinal axis of the energy cell (17) through at least some areas System to wind the winding zone (24), the winding zone (24) being essentially formed by at least three winding means (25, 26, 27) which are operatively connected to one another. Device (10) according to claim 1, characterized in that at least one of the winding means (25, 26, 27) is designed and set up to be changeable in its arrangement such that the winding zone (24) in the course of winding the material webs (11, 12, 13, 14) can be increased and/or reduced. Device (10) according to claim 1 or 2, characterized in that at least two of the winding means (25, 26, 27) have a contact surface (30) extending in a longitudinal axis for at least partial contact with the material webs (11, 12, 13, 14 ), wherein the contact surface (30) corresponds at least to the length of the longitudinal axis of the material web roll (22) to be wound. Device (10) according to one or more of claims 1 to 3, characterized in that at least two of the winding means (25, 26, 27) are rotatably mounted, preferably designed and set up to be drivable. 5. Device (10) according to one or more of claims 1 to 4, characterized in that the at least three winding means (25, 26, 27) are arranged to be movable relative to one another in such a way that the spacing of at least one of the three winding means (25, 26, 27) can be enlarged to the further winding means (25, 26, 27) in the course of winding in order to expand the winding zone (24).

6. Device (10) according to one or more of claims 1 to 5, characterized in that at least two of the winding means (25, 26, 27) can be moved substantially correspondingly to one another during winding along the transport section, at least one of the winding means ( 25, 26, 27) can be changed in such a way that the winding zone (24) can be expanded.

7. Device (10) according to one or more of claims 1 to 6, characterized in that at least one of the winding means (25, 26, 27) is designed and set up as a winding counter element (31), the material webs (11, 12, 13 , 14) can be wound between the at least two winding means (25, 26, 27) and the winding counter element (31).

8. Device (10) according to claim 7, characterized in that the at least three winding means (25, 26, 27) are designed and set up as two rotating winding rods (32) arranged essentially parallel to one another and as the winding counter element (31).

9. Device (10) according to one or more of claims 1 to 8, characterized in that the transport element (20) is designed and set up as a rotatably driven rotating body (33).

10. Device (10) according to claim 9, characterized in that at least two winding means (25, 26, 27) or the winding counter element (31) are/is arranged on the circumference (34) of the rotatably driven rotating body (33).

11. Device (10) according to one or more of claims 8 to 10, characterized in that the rotatably driven rotating body (33) has at least one rotatable support element (35) for arranging the at least two winding means (25, 26, 27) and / or of the winding counter element (31). Device (10) according to one or more of claims 8 to 11, characterized in that the winding counter element (31) is designed and set up as a flat winding track (36), the winding zone (24) being in connection with the winding means (25, 26 , 27) can be formed along the winding track (36). Device (10) according to one or more of claims 1 to 12, characterized in that the device (10) further comprises at least one cutting device (38) which is designed and set up to cut at least one of the material webs (11, 12, 13, 14 ) and/or to cut the material web roll (22) transversely or longitudinally to the transport direction (T), preferably arranged before and/or after the winding device (21). Device (10) according to one or more of claims 1 to 13, characterized in that at least one of the winding means (25, 26, 27) is designed to be temperature-controlled and / or pressure-resistant at least in some areas and is set up to be in the winding zone (24) at least in some areas to enter a temperature and/or pressure on the material webs (11, 12, 13, 14) or the material web roll (22). Device (10) according to one or more of claims 1 to 14, characterized in that at least one winding element insertion device (39) is arranged upstream of the winding device (21), which is designed and set up to move in the direction of the longitudinal axis of the energy cell (17). extending winding element (40) before or with 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 (40). bring. Device (10) according to one or more of claims 1 to 15, characterized in that at least one delivery device designed and set up to deliver the material web rolls (22) is arranged downstream of the winding device (21). Method for producing wound energy cells (17) from at least two material webs (11, 12, 13, 14) arranged one above the other, comprising the steps: - feeding the material webs (11, 12, 13, 14) by means of at least one feed device (15),

- at least partially transporting the material webs (11, 12, 13, 14) in the transport direction (T) along a transport section by means of a transport device (19) comprising a transport element (20),

- Winding the material webs (11, 12, 13, 14) to form a wound material web reel (22) by means of a winding device (21) comprising a winding station (23), characterized in that the material web reel (22) is in a winding zone (24) of the winding station (23) is wound, the material webs (11, 12, 13, 14) being wound in the direction of the longitudinal axis of the energy cell (17) by at least partially resting against the winding zone (24), the winding zone (24) essentially through at least three winding means (25, 26, 27) which are operatively connected to one another are formed. Method according to claim 17, characterized in that at least one of the winding means (25, 26, 27) is changed in its arrangement during winding in such a way that the winding zone (24) in the course of winding the material webs (11, 12, 13, 14 ) is increased and/or decreased. Method according to claim 17 or 18, characterized in that the at least three winding means (25, 26, 27) are moved relative to one another in such a way that the spacing of at least one of the three winding means (25, 26, 27) from the further winding means (25 , 26, 27) is enlarged in the course of winding in order to expand the winding zone (24). Method according to one or more of claims 17 to 19, characterized in that at least one of the winding means (25, 26, 27) is designed and set up as a winding counter element (31), the material webs (11, 12, 13, 14) between the at least two winding means (25, 26) and the winding counter element (31) are wound. Method according to claim 20, characterized in that the transport element (20) is designed and set up as a rotatably driven rotating body (3), with at least on the circumference (34) of the rotatably driven rotating body (33) at least two winding means (25, 26, 27) or the winding counter element (31) are/is arranged around the material webs (11, 12, 13, 14) during transport by means of the rotating body (33) with the two winding means (25, 26 ) or to bring it into operative connection with the winding counter element (31). Method according to one or more of claims 17 to 21, characterized in that the winding counter element (31) is designed and set up as a flat winding web (36), the material web winding (22) in the winding zone (24) in connection with the winding means ( 40) is formed along the winding track (36). Method according to one or more of claims 17 to 22, characterized in that at least one of the material webs (11, 12, 13, 14) and/or the material web roll (22) is cut transversely and/or longitudinally to the transport direction (T) by means of a cutting device ( 38) is/are cut, preferably arranged before and/or after the winding device (21). Method according to one or more of claims 17 to 23, characterized in that the material webs (11, 12, 13, 14) or the material web roll (22) in the winding zone (24) by means of at least one winding means (25, 26, 27) at least in some areas tempered and/or subjected to pressure. Method according to one or more of claims 17 to 24, characterized in that before or with the winding of the material webs (11, 12, 13, 14) by means of at least one winding element insertion device (39) upstream of the winding device (21) in the direction of the longitudinal axis the energy cell (17) extending winding element (40) 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 (40). Method according to one or more of claims 17 to 25, characterized in that the material web roll (22) is delivered from the winding device (21) by means of at least one delivery device arranged downstream of the winding device (21).