WO2023237333A2

WO2023237333A2 - Device and method for the pre-handling of material webs for the production of wound energy cells

Info

Publication number: WO2023237333A2
Application number: PCT/EP2023/063819
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: DE102022114553A1; WO2023237333A3

Abstract

The invention relates to a device (10) for the pre-handling of material webs (11, 12, 13, 14) for the production of wound energy cells, comprising at least two supply units (15, 16, 17, 18) which are each designed to supply at least one material web (11, 12, 13, 14), a transport unit (19) for transporting the material webs (11, 12, 13, 14) through the device (10), wherein the transport unit (19) comprises at least two transport elements (20) for transporting at least one material web (11, 12, 13, 14) along a transport section, wherein the transport unit (19) is designed to transport the material webs (11, 12 13, 14) with at least regions on top of one another by means of the transport elements (20), in order to provide a stacked assembly, characterised in that at least one pre-handling station (21) is provided which is designed to connect at least two material webs (11, 12, 13, 14) on top of one another at least in regions, wherein the at least two material webs (11, 12, 13, 14) form a material web composite (22) at least in regions. The invention also relates to a corresponding method.

Description

Device and method for the pretreatment of material webs for the production of wound energy cells

The invention relates to a device for the pretreatment of material webs for the production of wound energy cells, comprising at least two feed devices each designed and set up to feed at least one material web, a transport device for transporting the material webs through the device, the transport device having at least two transport elements for transporting at least one Comprises material web along a transport section, wherein the transport device is designed and set up to transport the material webs one above the other at least in regions by means of the transport elements in order to provide an arrangement lying one on top of the other.

The invention further relates to a method for the pretreatment of material webs for the production of wound energy cells, comprising the steps of providing at least two material webs by means of at least two feed devices, transporting the material webs by means of a transport device, the transport device having at least two transport elements for transporting at least one material web along a Transport section includes, wherein the material webs are transported one above the other at least in areas by means of the transport elements in order to provide a superimposed arrangement of the material webs.

Devices and methods for the pretreatment of material webs for the production of wound energy cells are known from the prior art. Such pretreatments are particularly necessary in connection with intermediate products in the production of energy cells or batteries comprising batteries in the production of energy cells. 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 the starting material. rials serve 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 present, for example, as a film or generally as a material web. The material webs are usually fed separately to a winding core on different paths. The material webs are regularly pre-cut to the desired width and/or length in an upstream manufacturing process and then wound accordingly in downstream devices or process steps. The material webs of 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 can be formed. The supply of material webs to the winding core cannot take place continuously in the known devices and methods, which means that there is a high logistical effort and extensive control and regulation processes also have to be carried out.

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 in the production of energy storage devices. When winding with material webs, 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. With the existing devices and methods, a large amount of space is required during the winding process, and the respective material webs may only be subjected to minimal stress. The material webs must be fed to the central winding core one after the other, with the fastest possible production speeds being provided. The material webs usually consist of very thin flat elements, which tend to suffer from loss of quality, particularly in the event of compression and torsional stress, which is why there are limits on transport speeds and transport guides. If several material webs are connected to one another, there is also the risk that they will break or be damaged during the winding process because the resulting composites are too rigid. In addition, the material webs regularly slip during the winding process, which leads to rejects and loss of quality in the wound energy cells. The installation space in the known devices is also very limited during the winding process around the winding core, since a close provision of the material webs is desired in order to ensure precise winding. However, due to the limited installation space, only energy cells with a small diameter can be produced for the respective winding. The known devices and methods are therefore relatively inflexible in terms of machine and winding size and, at the same time, require a large amount of space for handling and providing the material webs.

It is therefore the object of the present invention to propose a device for the pretreatment of material webs for the production of wound energy cells, which, on the one hand, ensures reliable handling and provision of the material webs and, on the other hand, to provide a direct, rapid and uniform pretreatment for a flexible downstream winding. The task remains to propose an appropriate procedure.

This object is achieved by the device mentioned at the outset in that at least one pretreatment station is provided, which is designed and set up to connect at least two material webs lying one on top of the other at least in some areas, the at least two material webs forming a material web composite at least in some areas.

The device according to the invention ensures that the at least two material webs can be connected to one another at least in some areas by means of the pretreatment station before winding. In this way, it is possible, for example, for at least two of the material webs to create a “common” beginning through the material web composite, which can serve as a starting point for a downstream winding. Alternatively or additionally, at least two of the material webs can be connected to one another at one end of the web. By producing a material web composite at least in some areas by means of the at least one pretreatment station, a possibility is provided for joining material webs together before winding in order to further process the material webs lying one on top of the other. Preferably, the pretreated material webs can then be further processed into a wound energy cell. By creating a sectional composite of material webs, an intermediate product can be produced, which can be used in a downstream winding process with a single material web from a multi-layer number of material webs lying on top of each other and connected in some areas can be introduced. The connected/pretreated material webs can be pulled and moved and fed together “as one material web,” for example to a downstream winding process. The pretreated material webs can then be alternately fed to several rolling processes, with one material web resulting in n rolls. This reduces the number of feeds and/or transport devices required during the winding process, resulting in faster and more flexible production of energy cells. The material webs connected in areas can also be transported more flexibly, which means that 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.

The material web composite produced in regions is preferably irreversible, so that the material webs are continuously connected to one another. In exceptional cases, it may be useful for the material web composite to be designed and set up to be reversible, especially if only a short-term fixation of at least two material webs to one another is to be provided. Such a fixation can be provided, for example, for transporting material webs within a device, machine or system complex. The pretreatment station can preferably include further means and/or elements, for example to support and/or form and set up a mechanical, cohesive and/or positive connection between the at least two material webs.

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 or cathode web, which are also referred to as anode material web or cathode material, anode foil or cathode foil. Preferably, the at least two material webs comprise two separator material webs, which can be connected to one another at least in some areas by means of the pretreatment station to form a material web composite. For the purposes of the invention, it is not necessary that only two material webs can be connected to one another to form a material web composite. It can further preferably be provided that between the material webs to be connected, in particular in the case of two separator material webs, at least one further material web, For example, an anode or cathode material web can be arranged at least partially between them in order to form and set up a corresponding material web composite.

With the arrangement lying one on top of the other, it is not essential that all material webs lie on top of one another over the entire period of transport, i.e. along the transport section. In the sense of the invention, lying one on top of the other means that the material webs are arranged one on top of the other at least in sections. Lying one on top of the other in the sense of the invention can therefore mean that the material webs are spaced apart or arranged one on top of the other with essentially no spacing, 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 using independent means of transport; if they are arranged without a distance, the material webs can preferably be transported using a 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 idea of the invention also includes devices whose width is adjusted in such a way that a plurality or plurality of material webs can be pre-treated in parallel at the same time. 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 and a single pretreatment station, a plurality or plurality of at least two material webs can be connected to one another at least in some areas, with the at least two material webs forming a material web composite at least in some areas. In other words, a plurality or number of material webs are processed in parallel on a device by adjusting the width of the device components accordingly. 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 cutting device designed and set up for cutting a material web is arranged along the transport section. 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 composite. The cutting devices are preferably intended for cutting endless webs to length. More preferably, a material web is cut along and/or transversely to the transport direction of the material web. 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 web 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.

An advantageous development is characterized in that at least one pretreatment station is designed and set up as a pressure rolling station comprising a counter-position in order to form, at least in some areas, a material web composite of at least two material webs. This provides a safe and easy way to connect at least two material webs together. Through the pressure rolling station in conjunction with the counter-position, a defined force input can be applied to the material webs, which on the one hand is sufficiently large to create the desired bond and which, on the other hand, prevents excessive mechanical stress on the corresponding material webs and the respective components. The pressure rolling station and/or the counter-position can preferably comprise further means, for example to support and/or form and set up a mechanical, material and/or positive connection between the at least two material webs. In a further advantageous embodiment of the invention, the pressure rolling station comprises at least one temperature-controlled pressure roller, designed and set up to form, at least in regions, a thermal material web composite of at least two material webs. A temperature-controlled pressure roller is particularly advantageous when forming a material web composite with at least two separator material webs, since these generally consist of thermally activated plastics such as PE or PP. Thermal treatment of such plastics enables the creation of a material web composite in a simple manner. The temperature-controlled pressure roller is preferably designed and set up as a heatable pressure roller. Alternatively or additionally, the temperature-controlled pressure roller can also be designed and set up for cooling, for example in order to support the formation of a material web composite when gluing is intended. The temperature-controlled pressure roller is preferably designed and set up to be controllable and/or regulated in order to provide a supply of thermal energy or cooling as required. Alternatively, it can be provided, for example, to form a thermal material web composite using laser and/or infrared radiation. A disadvantage in this context can be the lack of a counter-support to provide an appropriate joint. However, it is conceivable that a desired counter-position can be produced, for example, using negative pressure.

An expedient embodiment of the invention is characterized in that at least one pretreatment station comprises a lamination device, a gluing device, a welding device and/or an embossing device, designed and set up to connect at least two material webs at least in regions to form a material web composite. In this way, it is particularly possible to provide a mechanical, staff and/or positive connection between at least two material webs. A cohesive connection between two material webs is particularly preferably provided.

According to a further preferred embodiment of the invention, four feed devices are each provided for feeding at least one material web, the material webs preferably being two separator material webs and one anode material web and one cathode material web. The four material webs consisting of two separator material webs and one anode material web and one cathode material web generally form the starting material for wound energy cells. By connecting the corresponding material strips using a In at least some areas of material web composite, the starting materials are already cohesive and can then be fed to a winding process. The composite protects the material webs against slipping and mechanical stress, which ensures gentle handling of the material webs, especially during subsequent transport.

A further expedient embodiment of the invention is characterized in that the material webs can be fed to the transport device by means of the feed devices in such a way that the material webs can be arranged one on top of the other in a predetermined sequence, wherein preferably the cathode material web or the cathode material web can be arranged between two separator material webs. During the winding process, material webs of energy cells are usually wound closely together in the longitudinal direction. An appropriate structure is essential for producing a functioning energy cell. In the case of wound energy cells, a cathode material web is usually wound together with a corresponding anode material web and separator material webs in between, for example into a roll.

A preferred development of the invention is characterized in that the material webs can be transported by means of the transport device in such a way that the material webs can be arranged one on top of the other in a predetermined sequence, wherein preferably the anode material web or the cathode material web can be arranged between two separator material webs. For this purpose, the transport device is preferably controllable in such a way that the material webs fed by the feed devices can be transported accordingly by means of the transport device.

An expedient embodiment of the invention is characterized in that the pretreatment station is designed and set up to connect the two separator material webs lying on top of each other at least in some areas, the at least two separator material webs forming a material web composite at least in some areas. By connecting two separator material webs, several material webs can be connected in a simple manner. Separator material webs usually consist of plastics that can be thermally bonded to one another, which means that a material web composite can be formed. Preferably are initially only the two separator material webs can be connected at the beginning, which then form the beginning of the wrap, for example. The anode and/or the cathode material webs can then preferably also be connected to the separator material webs that have already been connected to form a material web composite. In a preferred embodiment, the separator material webs, which are connected to one another at least in some areas, can function as an independent winding core around which the further material webs can be wound during the winding process.

An advantageous development is characterized in that at least one support device is provided, designed and set up to place an additional material web section on at least part of a material web in order to connect the additional material web section with at least one material web at least in some areas by means of at least one pretreatment station. Such support devices are preferably arranged upstream of a pretreatment station in order to then form and set up a material web composite comprising the additional material web section. The support device enables direct interaction in order to place at least one additional material web section on at least one material web, that is to say, to form at least one superficial support of a material web. Such additional material web sections can preferably connect two material webs to one another at a connection point. For this purpose, the additional material web section is designed, for example, as a tensile layer in order to optimize the load capacity of the connection point, that is to say to increase or decrease it or to adapt it if necessary. For example, higher tensile forces can be transmitted using additional material web sections. In addition, it is possible for an additional material web section to function as the start of the winding, whereby a stiff winding core can be provided. In a preferred embodiment, the additional material web section is placed on the topmost material web or webs. The at least one support device is preferably arranged downstream of the at least one cutting device.

In a further preferred development of the invention, at least one of the at least two feed devices comprises a buffer device for the delayed provision of a material web. In this way, a needs-based supply of the respective material web can be carried out in order to provide the material webs depending on the other device components and with the device steps associated therewith. The buffer device is preferably designed for this purpose and set up to adapt a route of the material webs during feeding in such a way that the route of the feed can be changed. In this way, the material webs, for example, have to cover a longer distance, which means that the material webs can be made available to the pretreatment station with a delay, for example. Further preferably, the buffer device comprises a tensioning mechanism in order to set a desired web tension for material webs. The buffer device is preferably designed and set up as a so-called “dancer”.

The object is also achieved by the method mentioned at the beginning in that the at least two material webs are connected one on top of the other at least in some areas by means of a pretreatment station, the at least two material webs forming a material web composite at least in some areas. One of the advantages of the proposed method is that the material webs are connected to one another at least in some areas by means of the pretreatment station before winding. In this way, it is possible, for example, for at least two of the material webs to create a “common” beginning through the material web composite, which can serve as a starting point for a downstream winding. Alternatively or additionally, at least two of the material webs can be connected to one another at one end of the web. The at least partial production of a material web composite by means of the at least one pretreatment station provides a possibility of joining material webs together before winding in order to then further process the material webs lying on top of one another. Preferably, the pretreated material webs are then further processed into a wound energy cell. By producing a region-wise material web composite, an intermediate product is produced which can be introduced in a downstream winding process with a single material web from a plurality of material webs lying on top of each other and connected in regions. The connected/pretreated material webs can be exposed to higher mechanical forces, which is why they can be pulled and moved more strongly in processing steps and can be fed together “as one material web”, for example to a downstream winding process. The pretreated material webs can then be alternately fed to several rolling processes, with one material web resulting in n rolls. This leads to faster and more flexible production of energy cells. The material webs connected in certain areas can also be transported more flexibly, allowing for an increased number of windings and geometries of the energy. Gie cells can be created, which also reduces the risk of the material webs slipping or breaking. The material web composite produced in regions is preferably irreversible, so that the material webs are continuously connected to one another. In some embodiments, it may be useful for the material web composite to be designed to be reversible.

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 material webs is cut using a cutting device.

In a further advantageous embodiment of the invention, a material web composite of at least two material webs is formed at least in some areas by means of at least one pretreatment station designed and set up as a pressure rolling station comprising a counter-position.

An expedient embodiment of the invention is characterized in that at least one material web is fed by means of four feed devices, the material webs preferably being two separator material webs and one anode material web and one cathode material web.

A further preferred embodiment of the invention is characterized in that the material webs are fed to the transport device by means of the feed devices in such a way that the material webs are arranged one on top of the other in a predetermined sequence, the anode material web or the cathode material web preferably being arranged between two separator material webs.

A preferred development of the invention is characterized in that the material webs are transported by means of the transport device in such a way that the material webs are arranged one on top of the other in a predetermined sequence, the anode material web or the cathode material web preferably being arranged between two separator material webs. A further expedient embodiment of the invention is characterized in that, by means of the pretreatment station, the two separator material webs are connected to one another at least in some areas, with the at least two separator material webs forming a material web composite at least in some areas.

A further expedient embodiment of the invention is characterized in that an additional material web section is placed on at least part of a material web by means of at least one provided support device in order to connect the additional material web section with at least one material web at least in regions by means of at least one pretreatment station.

A preferred development of the invention is characterized in that at least one material web is provided in a delayed manner by means of at least one buffer device comprising the at least one feed 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 device according to the invention in cross section,

Fig. 2 is a schematic representation of a further embodiment of a device according to the invention in cross section and

3 a to c each show a schematic representation of preferred embodiments of a material web composite produced using the device according to the invention.

The device according to the invention is 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 comparable devices 10, which are 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 (machine) width, so that several material webs can be processed in parallel using the device. 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.

Such material webs 11, 12, 13, 14 are 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 comprises different steps in order 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 endless webs and can already be pre-cut in the intended lengths and/or widths.

1 and 2 each show schematically a different embodiment of a device 10 for the pretreatment of material webs 11, 12, 13, 14 for the production of wound energy cells. The devices 10 each comprise at least two feed devices 15, 16, 17, 18, each designed and set up to feed at least one material web 11, 12, 13, 14, a transport device 19 for transporting the material webs 11, 12, 13, 14 through the device 10 , wherein the transport device 19 comprises at least two transport elements 20 for transporting at least one material web 11, 12, 13, 14 along a transport section. The transport section represents the route over which the at least two material webs 11, 12, 13, 14 can be transported. The transport device 19 is designed and set up to transport the material webs 11, 12, 13, 14 one above the other at least in some areas by means of the transport elements 20 in order to provide an arrangement lying one on top of the other. In the first execution 1, the device 10 comprises two feed devices 15, 16 for feeding two material webs 11, 12. A section of the device 10 is shown, which preferably comprises further means and device components. One in the fig.

1 is suitable for the pretreatment of two material webs 11, 12. The further embodiment of the device 10 according to the invention shown in FIG. 2 has four feed devices 15, 16, 17, 18 each for feeding at least one material web 11, 12, 13, 14. The material webs 11, 12, 13, 14 can be arranged one on top of the other at least in sections by means of the transport device 19 and can be transported by means of the transport elements 20.

The device 10 is characterized according to the invention in that at least one pretreatment station 21 is provided, which is designed and set up to connect at least two material webs 11, 12, 13, 14 lying one on top of the other at least in some areas, the at least two material webs forming a material web composite 22 at least in some areas . 1 has a pretreatment station 21 which connects the two material webs 11, 12 to one another at least in some areas to form a material web composite 22. 2, three pretreatment stations 21 are provided in the preferred embodiment of the device 10, with at least two of the supplied material webs 11, 12, 13, 14 being able to be connected to one another at least in some areas to form a material web composite 22. In the device of FIG. 2, by means of the pretreatment stations 21, the material webs 11 and 12; 13 and 14 as well as 11 and 13 can be connected to one another at least in some areas. In the exemplary embodiment of FIG. 2, the material webs 13 and 14 can, for example, only be connectable to one another in certain areas, while the material webs 11 and 12 as well as 13 and 14 can be connected to one another essentially over the entire transport section.

In FIGS. 1 and 2, the device 10 is shown in cross section and, as an example, a material web 11, 12, 13, 14 is shown on the feed devices 15, 16, 17, 18. When used as intended, on such devices 10, a plurality or plurality of material webs 11, 12, 13, 14 can be transported simultaneously, that is, for example next to one another, within the device 10 and can be formed into a material web composite 22 at least in some areas by means of the at least one pretreatment station 21. In an advantageous embodiment, at least one cutting device 23 designed and set up for cutting a material web 11, 12, 13, 14 is arranged along the transport section. The cutting devices 23 are each formed, by way of example, in FIGS. 1 and 2 by a cutting means 24 and a counter drum 25. The counter drum 25 can alternatively also be generally designed as a counter support. By means of the cutting devices 23 they are on the counter drum

25 guided material webs 11, 12, 13, 14 can preferably be cut in terms of their length and / or width. Alternatively or additionally, certain cutting patterns can preferably be carried out. Preferably, the material webs 11, 12, 13, 14 are cut to length to a predetermined length, which is defined by the cutting process and/or the corresponding cutting means 24. Starting from the cutting device 23, the cut material webs 11, 12, 13, 14 are each fed to the corresponding pretreatment station 21. The counter drum 25 preferably also functions as a transport element 20 in order to transport the material webs 11, 12, 13, 14 in the transport direction along the transport section.

Preferably, at least one pretreatment station 21 is a counter-position

26 comprehensive pressure rolling station 27 designed and set up to at least partially form a material web composite 22 from at least two material webs 11, 12, 13, 14. The counter support 26 can preferably be drum-shaped. In the embodiments of FIGS. 1 and 2, the counter support 26 is shown as a drum, which also functions as a counter drum 25 for the cutting device 23 and as a transport element 20 or transport drum. In further embodiments, the corresponding device components can be present separately without forming double or multiple functions for the other devices. Further preferably, the pressure rolling station 27 comprises at least one temperature-controlled pressure roller 28, designed and set up to form at least partially a thermal material web composite 22 from at least two material webs 11, 12, 13, 14. A thermally produced material web composite 22 can therefore preferably be produced by means of the pretreatment station 21. In this way, for example, welding, laminating, gluing, joining, etc. can be implemented, in particular to provide a cohesive connection. The thermal energy can preferably be introduced through heat conduction, heat radiation and/or through convection. Alternatively or additionally, the material web composite 22 can be produced by joining (e.g. embossing). If necessary, auxiliary materials can be used for this purpose, in particular adhesives. More preferably includes at least one Pretreatment station 21 a lamination device, a gluing device, a welding device and / or an embossing device, designed and set up to connect at least two material webs 11, 12, 13, 14 at least in areas to form a material web composite 22.

As shown in Fig. 2, in a preferred embodiment, four feed devices 15, 16, 17, 18 can each be provided for feeding at least one material web 11, 12, 13, 14, the material webs 11, 12, 13, 14 preferably being two Separator material webs 11, 13 and each an anode material web 12 and a cathode material web 14. The arrangement of the feed devices 15, 16, 17, 18 and the material webs 11, 12, 13, 14 in FIGS. 1 and 2 only represent preferred embodiments. Depending on the desired material web composite 22 or energy cell to be produced, the arrangement may be useful , the number and/or the selection of the feed devices 15, 16, 17, 18 and the material webs 11, 12, 13, 14 must be adapted accordingly.

3a shows an example of a schematic representation of a material web composite 22 produced using the device 10 according to the invention. Fig. 3a shows a section of material webs 11, 12, 13, 14 lying one on top of the other with an at least partially material web composite 22. The material web composite 22 has four material webs 11, 12, 13, 14, at least the material webs 11 and 13 being connected to one another.

Preferably, the material webs 11, 12, 13, 14 can be fed to the transport device 19 by means of the feed devices 15, 16, 17, 18 in such a way that the material webs 11, 12, 13, 14 can be arranged one on top of the other in a predetermined sequence, preferably the Anode material web 12 or the cathode material web 14 can be arranged between two separator material webs 11, 13. Alternatively or additionally, the material webs 11, 12, 13, 14 can be transported by means of the transport device 19 in such a way that the material webs 11, 12, 13, 14 can be arranged one on top of the other in a predetermined sequence, with preferably the anode material web 12 or the cathode material web 14 between two separator material webs 11, 13 can be arranged.

As shown in FIG. 2, the pretreatment station 21 in the preferred embodiment is designed and set up to process the two separator material webs 11, 13 to be connected lying on top of each other at least in some areas, the at least two separator material webs 11, 13 forming a material web composite 22 at least in some areas. 2, a pretreatment station 21 is provided at the end of the device 10, that is to say at the beginning of the material webs 11, 12, 13, 14, which is intended for at least partially connecting the two separator material webs 11, 13. An exemplary material web composite 22 with two connected separator material webs 11, 13 is shown in FIG. 3a. For this purpose, the two separator material webs 11, 13 are provided lying one on top of the other, without another material web 12, 14 being arranged between them or lying on top of them. By creating a material web composite 22 at the beginning of the material webs 11, 12, 13, 14, a winding start can be created, for example, which can function as a winding core for subsequent winding of an energy cell. In such a pretreatment station 21, preferably only a region-by-area connection of the two separator material webs 11, 13 is provided, in particular in the area in which only two separator material webs 11, 13 are present. If necessary, the pretreatment station 21 or further pretreatment station 21 can connect further material webs 11, 12, 13, 14 to one another to form a material web composite 22.

In a further advantageous embodiment - not shown in the figures - at least one support device can be provided, which is designed and set up to place an additional material web section 29 on at least part of a material web 11, 12, 13, 14 in order to hold the additional material web section 29 with at least one Material web 11, 12, 13, 14 to be connected at least in some areas by means of at least one pretreatment station 21. 3b and 3c each show a section of material webs 11, 12, 13, 14 lying one on top of the other with a material web composite 22, which have an additional material web section 29. 3b, the additional material web section 29 rests on two anode material web sections 12 and, on the one hand, connects the two anode material web sections 12 in the horizontal and the separator material web 13 or 11 with the additional material web section 20, or the two separator material webs 11 and 13 with the additional material web section 20 in the vertical . 3c, the additional material web section 29 lies on two cathode material web sections 14 and, on the one hand, connects the two cathode material web sections 14 in the horizontal and the separator material web 13 with the additional material web section 20, or the two separator material webs 11 and 13 with the additional material web section 20 in the vertical. In a further preferred embodiment, at least one of the at least two feed devices 15, 16, 17, 48 comprises a buffer device 30 for the delayed provision of a material web 11, 12, 13, 14. The material webs 11, 12, 13, 14 can do this, for example, by means of the transport device 19 or be transported by at least one transport element 20. The buffer device 30 is preferably designed and set up to adapt the material webs 11, 12, 13, 14 during feeding in such a way that the route of the feeding can be changed. By adjusting the route, the material webs 11, 12, 13, 14, for example, have to cover a longer distance, whereby the material webs 11, 12, 13, 14, for example, can be made available to the at least one pretreatment station 21 with a delay. If the distance is shortened, the material webs 11, 12, 13, 14 can be provided to the pretreatment station 21 in an accelerated manner. This means, for example, that the arrangement of the corresponding material webs 11, 12, 13, 14 one on top of the other can be controlled. More preferably, the buffer device 30 comprises a tensioning mechanism in order to set a desired web tension for material webs 11, 12, 13, 14. The buffer device 30 is preferably designed and set up as a so-called “dancer”.

The procedure is explained in more detail below using the drawing. The method is used for the pretreatment of material webs 11, 12, 13, 14 for the production of wound energy cells, comprising the steps of providing at least two material webs 11, 12, 13, 14 by means of at least two feed devices 15, 16, 17,

18, transporting the material webs 11, 12, 13, 14 by means of a transport device

19, wherein the transport device 19 comprises at least two transport elements 20 for transporting at least one material web 11, 12, 13, 14 along a transport section, the material webs 11, 12, 13, 14 being transported one above the other at least in regions by means of the transport elements 30 in order to lie one on top of the other Arrangement of the material webs 11, 12, 13, 14 to provide. 1 and 2 each show corresponding devices 10 for providing the method according to the invention.

This method is characterized according to the invention in that the at least two material webs 11, 12, 13, 14 are connected one on top of the other at least in some areas by means of a pretreatment station 21, the at least two material webs 11, 12, 13, 14 forming a material web composite at least in some areas 22 form. 1 has a pretreatment station 21 by means of which two supplied material webs 11, 12 are connected to one another at least in some areas to form a material web composite 22. 2, three pretreatment stations 21 are provided in the preferred embodiment of the device 10, with at least two of the supplied material webs 11, 12, 13, 14 being connected to one another at least in some areas to form a material web composite 22. In the device of FIG. 2, the material webs 11 and 12; 13 and 14 as well as 11 and 13 are connected to one another at least in some areas. As in the exemplary embodiment of FIG. 2, the material webs 13 and 14 can, for example, only be connected to one another in certain areas, while the material webs 11 and 12 as well as 13 and 14 are connected to one another essentially over the entire transport section. In such methods, a plurality or plurality of material webs 11, 12, 13, 14 can preferably be connected simultaneously, that is, for example next to one another, by means of the at least one pretreatment station 21, at least in some areas, to form a material web composite 22. For this purpose, the pretreatment station 22 is in operative connection with the at least two material webs 11, 12, 13, 14 in order to form the material web composite 22. The material web composite 22 makes the material webs 11, 12, 13, 14 more resistant, particularly with regard to mechanical stress, and the material web composite 22 can also be suitable as a starting point for winding.

The material webs 11, 12, 13, 14 are preferably made available to the feed devices 15, 16, 17, 18 by wound endless webs - not shown in the figures - or can be produced directly in advance in upstream manufacturing machines - also not shown. More preferably, at least one of the material webs 11, 12, 13, 14 is cut by means of a cutting device 23. Using the cutting device 23, different cuts can be made for different purposes. For example, a material web 11, 12, 13, 14 can be cut to length and/or cut to a predetermined width.

In a further advantageous embodiment, a material web composite 22 made up of at least two material webs 11, 12, 13, 14 is formed at least in some areas by means of at least one pretreatment station 21 designed and set up as a counter-position 26. The pressure rolling station 27 can apply a force to at least two material webs 11, 12, 13, 14, with the counter-position 26 applying the corresponding counterforce and/or serving as an antidote. Through the application of force, the material web composite 22 is produced in the intended area. By means of the pretreatment station 21, thermal energy is preferably introduced onto the material webs 11, 12, 13, 14, whereby, for example, cohesive connections can be formed. As shown in Fig. 2, at least one material web 11, 12, 13, 14 is preferably fed by means of four feed devices 15, 16, 17, 18, with the material webs 11, 12, 13, 14 preferably two separator material webs 11, 13 and each an anode material web 12 and a cathode material web 14. By means of the feed devices 15, 16, 17, 18, the material webs 11, 12, 13, 14 are preferably fed to the transport device 19 in such a way that the material webs 11, 12, 13, 14 are arranged one on top of the other in a predetermined sequence, preferably the anode material web 12 or the cathode material web 14 is arranged between two separator material webs 11, 13. Alternatively or additionally, the material webs 11, 12, 13, 14 are transported by means of the transport device 19 in such a way that the material webs 11, 12, 13, 14 are arranged one on top of the other in a predetermined sequence, with preferably the anode material web 12 or the cathode material web 14 between two separator material webs 11, 13 is arranged.

In a preferred embodiment, an additional material web section 29 is placed on at least part of a material web 11, 12, 13, 14 by means of at least one provided support device in order to at least partially connect the additional material web section 29 with at least one material web 11, 12, 13, 14 by means of at least one pretreatment station 21 to connect. The additional material web section 29 is placed on at least part of a material web 11, 12, 13, 14 preferably online and in front of a pretreatment station 21.

A material web composite 22 produced by the method is shown in FIG. 3a. The corresponding material web composite 22 is produced by using the pretreatment station 21 to connect the two separator material webs 11, 13 lying on top of each other at least in some areas, the at least two separator material webs 11, 13 forming a material web composite 22 at least in some areas. 3b and 3c show a material web composite 22 produced by the method with an additional material web section 29. The corresponding corresponding material web composite 22 is produced by first placing an additional material web section 29 on at least one material web 11, 12, 13, 14 and by means of the pretreatment station 21 the additional material web section 29 and the at least one material web 11, 12, 13, 14 are connected to one another at least in some areas be, with a corresponding material web composite 22 being formed at least in some areas.

In a further preferred embodiment, at least one material web 11, 12, 13, 14 is provided in a delayed manner by means of at least one buffer device 30 comprising the at least one feed device 15, 16, 17, 18. 1 and 2, the feed devices 16 and 18 each include a buffer device 30. The buffer device 30 is designed and set up here as a so-called “dancer”, whereby the material webs 12 and 14 can be provided with a corresponding delay. In this way, for example, the corresponding material webs 12 and 14 can be provided with a delay on the material webs 11 and 13 lying on them, whereby, for example, a spacing between two material webs 12 or 14 can be created, in particular if these are separated by means of the cutting device 23.

Claims

Expectations

1 . Device (10) for the pretreatment of material webs (11, 12, 13, 14) for the production of wound energy cells, comprising at least two feed devices (15, 16, 17, 18), each for feeding at least one material web (11, 12, 13, 14) designed and set up, a transport device (19) for transporting the material webs (11, 12, 13, 14) through the device (10), the transport device (19) having at least two transport elements (20) for transporting at least one material web (11 , 12, 13, 14) along a transport section, wherein the transport device (19) is designed and set up to transport the material webs (11, 12, 13, 14) one above the other at least in some areas by means of the transport elements (20) in order to achieve a superimposed arrangement to provide, characterized in that at least one pretreatment station (21) is provided, which is designed and set up to connect at least two material webs (11, 12, 13, 14) lying one on top of the other at least in some areas, the at least two material webs (11, 12, 13 , 14) form a material web composite (22) at least in some areas.

2. Device (10) according to claim 1, characterized in that at least one cutting device (23) designed and set up for cutting a material web (11, 12, 13, 14) is arranged along the transport section.

3. Device (10) according to claim 1 or 2, characterized in that at least one pretreatment station (21) is designed and set up as a pressure rolling station (27) comprising a counter-position (26) in order to at least partially produce a material web composite (22) consisting of at least two To form material webs (11, 12, 13, 14).

4. Device (10) according to claim 3, characterized in that the pressure rolling station (27) comprises at least one temperature-controlled pressure roller (28), designed and set up to provide a thermal mass at least in some areas. terialbahnenverbund (22) from at least two material webs (11, 12, 13, 14) to form.

5. Device (10) according to claim 1 or 2, characterized in that at least one pretreatment station (21) comprises a lamination device, a gluing device, a welding device and / or an embossing device, designed and set up to at least two material webs (11, 12, 13, 14) to be connected at least in some areas to form a material web composite (22).

6. Device (10) according to one or more of claims 1 to 5, characterized in that four feed devices (15, 16, 17, 18) are each provided for feeding at least one material web (11, 12, 13, 14), whereby the material webs (11, 12, 13, 14) are preferably two separator material webs (11, 13) and each an anode material web (12) and a cathode material web (14).

7. Device (10) according to claim 6, characterized in that the material webs (11, 12, 13, 14) can be fed to the transport device (19) by means of the feed devices (15, 16, 17, 18) in such a way that the material webs (11, 12, 13, 14) can be arranged one on top of the other in a predetermined sequence, wherein preferably the anode material web (12) or the cathode material web (14) can be arranged between two separator material webs (11, 13).

8. Device (10) according to claim 6 or 7, characterized in that the material webs (11, 12, 13, 14) can be transported by means of the transport device (19) in such a way that the material webs (11, 12, 13, 14) in can be arranged one on top of the other in a predetermined sequence, wherein preferably the anode material web (12) or the cathode material web (14) can be arranged between two separator material webs (11, 13).

9. Device (10) according to one or more of claims 6 to 8, characterized in that the pretreatment station (21) is designed and set up to connect the two separator material webs (11, 13) lying one on top of the other at least in regions, the at least two separator material webs ( 11, 13) form a material web composite (22) at least in some areas.

10. Device (10) according to one or more of claims 1 to 9, characterized in that at least one support device is provided, designed and set up to place an additional material web section (29) on at least part of a material web (11, 12, 13, 14). in order to connect the additional material web section (29) with at least one material web (11, 12, 13, 14) at least in some areas by means of at least one pretreatment station (21).

11. Device (10) according to one or more of claims 1 to 10, characterized in that at least one of the at least two feed devices (15, 16, 17, 18) has a buffer device (30) for the delayed provision of a material web (11, 12, 13, 14).

12. Process for the pretreatment of material webs (11, 12, 13, 14) for the production of wound energy cells, comprising the steps:

Providing at least two material webs (11, 12, 13, 14) by means of at least two feed devices (15, 16, 17, 18),

Transporting the material webs (11, 12, 13, 14) by means of a transport device (19), the transport device (19) comprising at least two transport elements (20) for transporting at least one material web (11, 12, 13, 14) along a transport section, wherein the material webs (11, 12, 13, 14) are transported one above the other at least in some areas by means of the transport elements (20) in order to provide a superimposed arrangement of the material webs (11, 12, 13, 14), characterized in that the at least two material webs ( 11, 12, 13, 14) are connected one on top of the other at least in some areas by means of a pretreatment station (21), the at least two material webs (11, 12, 13, 14) forming a material web composite (22) at least in some areas.

13. The method according to claim 12, characterized in that at least one of the material webs (11, 12, 13, 14) is cut by means of a cutting device (23). Method according to claim 12 or 13, characterized in that by means of at least one pre-treatment station (21) designed and set up as a counter-position (26), a material web composite (22) consisting of at least two material webs (11, 12, 13, 14) is formed. Method according to one or more of claims 12 to 14, characterized in that at least one material web (11, 12, 13, 14) is fed by means of four feed devices (15, 16, 17, 18), the material webs (11, 12 , 13, 14) are preferably two separator material webs (11, 13) and each an anode material web (12) and a cathode material web (14). Method according to claim 15, characterized in that the material webs (11, 12, 13, 14) are fed to the transport device (19) by means of the feed devices (15, 16, 17, 18) in such a way that the material webs (11, 12, 13, 14) are arranged one on top of the other in a predetermined sequence, the anode material web (12) or the cathode material web (14) preferably being arranged between two separator material webs (11, 13). Method according to claim 15 or 16, characterized in that the material webs are transported by means of the transport device (19) in such a way that the material webs (11, 12, 13, 14) are arranged one on top of the other in a predetermined sequence, preferably the anode material web (12) or the cathode material web (14) is arranged between two separator material webs (11, 13). Method according to one or more of claims 15 to 17, characterized in that by means of the pretreatment station (21), the two separator material webs (11, 13) are connected one on top of the other at least in some areas, the at least two separator material webs (11, 13) forming a material web composite (11, 13) at least in some areas ( 22) form. Method according to one or more of claims 12 to 18, characterized in that an additional material web section (29) is placed on at least part of a material web (11, 12, 13, 14) by means of at least one support device provided in order to support the additional material web section (29). to be connected to at least one material web (11, 12, 13, 14) at least in some areas by means of at least one pretreatment station (21). Method according to one or more of claims 12 to 19, characterized in that at least one material web (11, 12, 13, 14) by means of at least one buffer device (30) comprising the at least one feed device (15, 16, 17, 18) is provided with a delay.