Device and method for the energy cell manufacturing industry for forming a stack comprising a plurality of segments and a material web

Abstract

The invention relates to a device (1) for the energy cell manufacturing industry for forming a stack (2) comprising a plurality of segments (3) and a material web (4), wherein the device (1) is designed to fold the material web (4) in a zigzag manner and to deposit the segments (3) on the material web (4) such that, in the stack (2), the segments (3) are arranged in the folds (5) of the material web (4), wherein the device (1) comprises the following components: a stacking table (6) on which the stack (2) is formed; a material web feed unit (10) which is designed to convey the material web (4) to the stacking table (6); and a first and / or a second segment feed unit (11, 12), which are each designed to convey segments (3) to the stacking table (6), wherein the first and / or the second segment feed units (11, 12) each comprise at least one rotational body (21, 22) which is rotatably mounted about an axis of rotation and which is designed to convey segments (3) via a rotational movement.

Description

Apparatus and method for the energy cell manufacturing industry for forming a stack comprising a plurality of segments and a material web The present invention relates to a device for the energy cell producing industry for forming a stack comprising a plurality of segments and a material web, according to the preamble of claim 1 and a corresponding method according to the preamble of claim 33. It is known in principle from the prior art to use energy cells or energy storage devices in motor vehicles, other land vehicles, ships, aircraft, or even in stationary systems in the form of battery cells or fuel cells, with which large amounts of energy can be stored over long periods of time. For this purpose, such energy cells have a structure consisting of a large number of segments stacked to form a stack, between which another material is arranged. The segments can, for example, be designed as electrode sheets, so that anode and cathode sheets alternate one after the other in the stack; in such a case, a layer of a separator web is arranged between two adjacent electrode sheets. According to a first variant, the separators can be arranged between the electrodes in the form of individual separator sheets. According to a second variant, it is also known to place the separator in the form of a material web around the segments by forming a zigzag-shaped fold, i.e., a so-called Z-fold. To form the Z-fold, it is generally known from the prior art to form the cell stack on a stacking table that is mounted so that it can be moved horizontally. In a first deposit position, an anode sheet is placed on a separator sheet stretched over the stacking table. By moving the stacking table horizontally to a second deposit position, the separator sheet is placed or folded around the deposited anode sheet. Subsequently, in the second deposit position, a cathode sheet is placed on the separator sheet. By moving the stacking table horizontally back to the first deposit position, the separator sheet is placed or folded around the cathode sheet so that another anode sheet can be placed on it once the first deposit position has been reached. This process is repeated until the desired cell stack height is reached, i.e. the cell stack is complete.In this way, the Z-fold mentioned at the beginning can be realized in manufacturing technology. It is an object of the present application to provide an improved device for the energy cell producing industry for forming a stack comprising a plurality of segments and a material web with a Z-fold, as well as a correspondingly improved method. The object is achieved by the features of the independent claims. Further preferred embodiments of the invention can be found in the dependent claims, the figures, and the associated description. First, some terms used in this application are explained here: A body of revolution, as defined in this application, is any body that is mounted so that it can rotate. The geometry of the body is not further defined by the term. When reference is made to an endless web in this application, this obviously does not mean an endless web in the literal sense, but rather a web that can be continuously replenished during production. This re-conveying is only interrupted when a new web is made available. In practice, endless webs are formed, for example, by joining two webs wound onto so-called coils, also called bobbins. During the production process, the web is then unwound from the coil. The aim is to join the web of an expiring (old) coil with the web of a new coil, if possible without interrupting the production process, so that the web is essentially continuously replenished during production. A stacking table, as defined in the present application, is a device that has a storage surface on which a stack can be formed. The storage surface does not necessarily have to be smooth or continuous; it can also have recesses such as holes, webs, or gaps. The holes are, for example, continuous openings that extend from a top side to a bottom side of the storage surface. Alternatively or additionally, the storage surface can also include vacuum holes. A fold in the sense of this application is understood to mean any type of fold. The fold edge therefore does not have to necessarily be tapered. This also includes folds with rounded fold edges. According to a first aspect of this application, the object is achieved by a device for the energy cell producing industry for forming a stack comprising a plurality of segments and a material web, wherein the device is configured to fold the material web in a zigzag shape and to deposit the segments on the material web such that, in the stack, the segments are arranged in the folds of the material web, wherein the device comprises the following components: a stacking table on which the stack is formed, a material web feed device configured to convey the material web to the stacking table, and a first and / or a second segment feed device, each configured to convey segments to the stacking table, wherein the first and / or the second segment feed device each comprise at least one rotational body mounted rotatably about a rotational axis, which is configured toTo transport segments by a rotational movement., It has been shown that the rotating bodies allow the segment conveying speed to be particularly well adapted to the downstream process steps of stack formation. This adaptability of the segment conveying speed can increase the overall production output of the device, leading to lower production costs. Furthermore, by transporting the segments by means of the rotation bodies, a relative movement between the contact surface of the rotation body and the segment resting on it can be significantly reduced or completely eliminated. The reduced slippage results in less abrasion and contamination, which in turn improves the quality of the finished stack, which is used, for example, to form an energy cell. The scrap rate can thus also be reduced. Furthermore, transporting the segments using a rotating body offers the advantage of high flexibility. This allows additional rotating bodies to be added without major effort to implement additional functions. Furthermore, it creates the possibility of generating new production paths for transporting the segments or combining existing production paths. Furthermore, rotating bodies as conveying devices offer the advantage that the conveying path of the material supply can be designed flexibly; for example, the segments can be fed from any spatial direction and the conveying paths can still be spatially separated from one another. Finally, rotating bodies as conveyors offer the advantage that segments can be easily removed from the rotating bodies. For example, damaged segments or segments that do not meet quality requirements can be easily removed from the production process. This can reduce the number of defective stacks. Of course, the transport of segments within a segment feeding system does not have to be carried out entirely on rotating bodies. A different conveying device can also be provided for certain sections. For example, if For a particular process step, a segment can be placed on a belt system for processing and later picked up by a rotating body. This allows the optimal conveying concept to be implemented for each process step. According to a preferred embodiment, it is proposed that the one rotational body or at least one of the plurality of rotational bodies of the first and / or the second segment feed device conveys or conveys segments in a clocked movement. For the purposes of this application, a clocked movement is understood to mean the succession of clock cycles, each comprising a rest interval and a movement interval. During the rest interval, the movement speed is significantly reduced compared to the movement interval. For the purposes of this application, a significantly reduced speed means that the maximum speed during the rest interval may be a maximum of 0.5 times the maximum speed during the movement interval, preferably a maximum of 0.2 times, and particularly preferably 0.1 times. According to a preferred embodiment of this application, the movement speed of the segments and / or the endless track during the rest interval is zero or approximately zero.Of course, it is known to the person skilled in the art that a longer duration of the rest interval and a greater degree of speed reduction, for example down to zero, in the rest interval must be compensated by an even higher speed in the movement interval. The clocked movement also ensures a clocked stacking process, which leads to a high level of process reliability Furthermore, certain processes can be carried out on the segments moved in a timed manner in the rest interval, in particular when the segment is at a standstill, and other functions can be carried out in the movement interval. For example, it can be advantageous to carry out the process of checking a segment in a rest interval and the process of a certain type of processing, for example the process of cleaning a segment, in the movement interval. Finally, the timed movement offers the advantage, particularly when the first and second segment feed devices are present, that one of the segment feed devices pauses for one cycle if a segment is missing from the other segment feed device, for example because it has been ejected. This means that segments that meet the quality requirements do not have to be ejected. It is further proposed that the first and / or second segment feed device each comprise a transfer device configured to deposit segments on the stacking table, in particular by a back-and-forth movement. The depositing movement is thus decoupled from the rotational movement of the rotating bodies. By means of the transfer device, a depositing movement can be carried out in such a way that a precise positioning of the segments on the stacking table is enabled. When reference is made below to segments being deposited on the stacking table, this does not necessarily mean depositing a segment directly on the stacking table, but also depositing it on an unfinished stack that is formed on the stacking table. Preferably, a rotation body of the first and / or the second segment feed device forms a transfer rotation body. from which the transfer device of the first and / or the second segment feed device takes over a segment. In this way, it can be ensured that the segment can be transported up to just before the stacking table by means of a rotary body and thus with the advantages described above. Preferably, apart from a single transfer device of the first and / or the second segment feed device, no further transport means are provided between the transfer rotary body and the stacking table. Preferably, the first and / or the second segment feed device each comprise a plurality of rotary bodies, of which exactly one in each case forms the transfer rotary body, as well as exactly one transfer device. According to a preferred embodiment, it is proposed that the rotary transfer body of the first and / or second segment feed device each have recesses that allow engagement of an outer contour of the associated transfer device, so that the transfer device engages the recesses of the rotary transfer body when receiving a segment. Thus, the segments can be taken over by the rotary transfer body through a combing movement in a product-friendly manner. It is further proposed that the device comprise a first and a second segment feed device, wherein the transfer rotary bodies of the first and second segment feed devices are arranged such that the material web is guided therebetween by means of the material web feed device. In other words, the transfer rotary body of the first segment feed device is arranged on a different side of the material web than the transfer rotary body of the second segment feed device. This arrangement allows the material web to be fed to the stacking table between the two rotary transfer bodies. Furthermore, the material web fed to the stacking table can be supplied with segments on both sides from the two rotary transfer bodies. The stacking table preferably comprises a hold-down device, which preferably comprises one or more hold-down fingers, wherein the hold-down device is configured to temporarily fix a segment deposited on the stacking table by the transfer device of the first and / or the second segment feed device. By fixing the segments by means of the hold-down device, the material web can be wrapped around the thus fixed segment without slipping; this allows a reliable formation of the zigzag fold. If the hold-down device is formed by one or more hold-down fingers, the hold-down fingers can be brought into a fixing state and a release state, for example individually or in groups, in particular in pairs. The fixing state is preferably achieved by the corresponding hold-down fingers pressing the segment from above against the rest of the stack.Furthermore, the holding fingers are preferably also displaceable in the horizontal direction, so that they can be pulled out of the stack again to reach the release state when a new layer of the material web and / or a new segment is placed over the segment secured by them. The hold-down fingers preferably have a flattened section so that they can be easily pulled out of the stack again. The switching state of the hold-down device is preferably controlled and / or regulated such that after a first segment has been deposited on the stacking table, corresponding hold-down fingers... a first group into the fixing position. The material web is then placed around or onto the deposited first segment so that a further segment can be placed on top of it. This further segment is then preferably fixed in place by the transfer device and / or with further hold-down fingers of a second group; only when this state is reached are the hold-down fingers of the first group moved from the fixing position into the release position. The hold-down fingers of the second group are then also moved from the fixing position into the release position in a corresponding manner. The hold-down fingers of the hold-down device are therefore preferably divided into two groups. The hold-down finger(s) of the first group are designed to fix a segment of the first type which is fed from a first side of the material web from the stacking table.Furthermore, the hold-down finger(s) of the second group are configured to secure a segment of the second type that is fed from a second side of the material web from the stacking table. Thus, by alternately securing the segments of the first and second type using the hold-down device and by appropriately folding the material web around the just-secured segment, a stack can be formed in which the material web wraps around the segments in a zigzag pattern. Furthermore, this alternate securing has the advantage that the hold-down fingers of the first group are only in contact with the segments that are fed from the first side of the stacking table, and the hold-down fingers of the second group are only in contact with the segments that are fed from the second side of the stacking table. This prevents particle cross-contamination, which could negatively affect the quality of the stack. The device preferably comprises a first and a second segment feed device, wherein the device is configured to alternately deliver a segment from the first segment feed device and the second segment feed device to the stacking table to form the stack. Preferably, a different type of segment is conveyed and fed to the stacking table by the first segment feed device than by the second segment feed device. This also prevents particle cross-contamination, i.e., contamination with particles of the respective other type of segment, when feeding segments of different types to the stacking table.If the first segment feed device is used to feed segments of the first type, for example in the form of anode sheets, and the second segment feed device is used to feed segments of the second type, for example in the form of cathode sheets, then segments of the first and second type can be deposited alternately on the stacking table. The material web is preferably a web-shaped separator. The proposed device allows the separator to be placed in a Z-shape around the segments in the form of cathode and anode sheets, so that the proposed device can be used in a manufacturing process for forming a battery cell. By designing the device in this way, corresponding cell stacks can be manufactured at a significantly increased production speed compared to the prior art. It is further proposed that the transfer device of the first and / or second segment feed device be configured to convey a segment along a curved path, for example, along a circular path section, and / or to convey it while changing its spatial orientation. shows that by means of such a movement path, preferably in combination with the change of the spatial orientation of the segment, a particularly precise positioning of the segments on the stacking table can be achieved. It is further proposed that the first and / or the second segment feed device each comprise a first conveyor section, wherein the device is configured to convey an endless segment web, from which the segments are formed, at a constant or approximately constant conveyor speed in the first conveyor section. For the purposes of this application, an approximately constant speed of the endless segment web is understood to mean a speed whose minimum and maximum speeds deviate from the average conveyor speed by no more than 20%, preferably by no more than 10% and more preferably by no more than 5%. In this way, an endless segment web can be fed continuously or approximately continuously to the stacking process, wherein it is provided, for example, as a coil with a wound electrode web.Preferably, all webs, i.e. both the endless segment webs and the material web, are provided as coils. Preferably, the first and / or the second segment feed device each comprise a second conveyor section, wherein the device is configured to convey the endless segment web in the second conveyor section with a clocked movement. By conveying the endless segment web in a clocked movement in the second conveyor section, which preferably extends over several rotating bodies, the aforementioned advantages of a clocked movement can be benefited from. The clocked movement in the second conveyor section allows the stack to be constructed asymmetrically. For example, an anode sheet can be deposited as the first and last segment of the stack by switching off a so-called cathode cycle, in which a cathode is fed to the stacking table. Preferably, a compensating device, for example, comprising a dancer roller, is arranged between the first conveyor section and the second conveyor section. The compensating device is designed to enable a transition between a constant conveyor speed and a cyclical movement. A person skilled in the art understands a dancer roller to be a roller around which the material web is guided, the rotational axis of which is mounted so that it can be displaced and / or pivoted in order to perform a compensating movement. The dancer roller has proven itself in practice as a reliable component for compensating the different conveyor speeds in the first and second conveyor sections. Preferably, a separating device is provided in the second conveyor section, which is designed to divide the endless segment web into segments. In the second conveyor section, it is then generally possible to carry out the division in the rest interval or in the movement interval. In practice, separating in the movement interval has proven advantageous. The separating device can, for example, be designed to carry out a mechanical cut; this can also be carried out, for example, by means of a knife and / or a counter edge as a cutting means. It has proven advantageous if the endless segment web to be cut during the The cut is guided on a rotating body in the form of a cutting drum, and the cut is performed by a rotating knife. Alternatively, the cutting device can also be configured to perform a thermal cut; in this case, the cutting means can be, for example, a laser. It is further proposed that, in a third conveyor section of the first and / or second segment feed device, segments be conveyed with a synchronized movement. Thus, all processes performed in the third conveyor section can benefit from the synchronized movement. Preferably, the third conveyor section is arranged downstream of the first and second conveyor sections. Thus, the segments are transferred from the third conveyor section of the first and / or second segment feed device to the stacking table. It is further proposed that the at least one rotating body of the first and / or second segment feed device is a drum that is designed to hold and transport a segment on its outer surface, in particular by means of negative pressure. Thus, the segments can be transported in or on the corresponding transport section on the outer surface of the drum. The segments can be held, for example, by applying negative pressure in or on the transport section and / or by mechanical holding means. The holding force on the rotating bodies is preferably adjustable such that a transfer of a segment to an adjacent rotating body can take place. The transfer of a segment to an adjacent drum preferably takes place in the movement interval. Furthermore, rotating bodies in the form of drums offer the advantage that they can be easily modified, for example to adapt to the segment to be transported or to adapt the conveying movement to the needs of optional functional units of the device. The drums are preferably also arranged and / or their rotation is controlled in such a way that, during the resting phase, sections of a segment are not located on two adjacent drums at the same time. For example, plungers and / or sliders can be provided inside the rotating body, which are designed to move the transport sections individually radially outwards and / or parallel to the axis of rotation in order to transfer a segment to a neighboring drum. Alternatively or additionally, at least one drum can be designed as a pitch-changing drum. Such a pitch-changing drum can have a plurality of transport sections arranged on the circumference, each for transporting a segment of the material flow. The transport sections are movable in the radial direction and / or circumferential direction of the pitch-changing drum, so that the segments are moved from a receiving point to a discharge point from a smaller radius to a larger radius and / or in the circumferential direction. The proposed pitch-changing drum allows the spacing increase to be carried out on a rotating drum itself.The increase in the distance between the segments is effected by the transport sections and their movement, in that the segments held on the transport sections are moved by the transport sections themselves into an alignment with an increased or reduced distance towards or away from each other without slippage and friction. It is further proposed that the material web feed device comprise a folding device configured to place a section of the material web over and / or around the respective uppermost segment of the stack located on the stacking table by means of a reciprocating movement. It has been shown that the reciprocating movement of the folding device, which preferably takes place in a horizontal plane, allows the material web to be efficiently placed around the uppermost segment of the unfinished stack. The reciprocating movement can take the form of a linear movement or a pivoting movement. The folding device preferably comprises a movably mounted pair of rollers through which the material web is guided. A section of the material web located above the cell stack can be moved back and forth by the movably mounted pair of rollers as described above. A movably mounted pair of rollers means that the axes of rotation of both rollers of the pair of rollers can be moved, preferably shifted, in such a way that the position and / or orientation of the axes of rotation of both rollers changes in the same way. The material web is fixed in a first section by the unfinished stack and guided in a second section by the movably mounted pair of rollers such that the corresponding fold can be formed around the uppermost segment of the unfinished cell stack by the back and forth movement of the movably mounted pair of rollers.The desired Z-fold can be achieved by the back and forth movement of the material web and the synchronized alternating addition of segments by the first and second segment feed devices. It is further proposed that the device be configured to continuously feed the material web by means of the material web feed device to a compensating device, for example, comprising a dancer roller from which the folding device is supplied with the material web. The movably mounted roller pair of the folding device, which generates the folding movement, requires, through its movement, a temporally varying feed speed of the material web per work cycle. This effect can be compensated for by the compensating device, so that the material web can be fed to the compensating device at a constant speed. Furthermore, sufficient web tension can be maintained within the material web feed device. It is further proposed that the device comprise a first and a second segment feed device, wherein a folding space is defined by the curved outer surfaces of the transfer rotary bodies of the first and second segment feed devices and by the stacking table, wherein the folding device deflects the material web using this folding space to perform a folding movement. Furthermore, the device is preferably additionally configured such that an opening angle is formed by the curved outer surfaces of the two preferably oppositely arranged transfer rotary bodies of the first and second segment feed devices, wherein the folding device deflects the material web using this opening angle to perform a folding movement.The invention has recognized that, by means of the transfer rotation bodies of the first and the second segment feed device, the segments can be transported in this way, firstly, to just in front of the stacking table and, secondly, the folding space and / or the opening formed. The opening angle provides sufficient space for the transfer device to pivot. Third, the folding space and / or the opening angle provide sufficient space for the movably mounted pair of rollers of the folding device to move back and forth above the stacking table. According to a further preferred embodiment, it is proposed that the first and / or the second segment feed device each comprise at least three rotational bodies, wherein at least three of the rotational bodies of the first and / or the second segment feed device are arranged in a linear configuration, wherein the linear configuration is characterized in that the axes of rotation of all rotational bodies of the linear configuration run in a common plane, wherein preferably all rotational bodies of the linear configuration have the same diameter. Due to the linear arrangement, the arrangement of functional units that interact with the rotational bodies of the linear arrangement can be changed and / or expanded as desired. Such functional units can be, for example, testing or cleaning units. Preferably, the stacking table is mounted during the stacking process in such a way that movements of the stacking table with a horizontal directional component are prevented or the stacking table can be moved horizontally by a maximum of 2 mm, more preferably by a maximum of 1 mm, in particular preferably by a maximum of 0.5 mm, to compensate for position errors when depositing segments. By preventing a horizontal movement component of the stacking table, it is achieved that the processes of folding the material web and depositing the segments are carried out solely by the kinematics of the folding device and the transfer The first and / or second segment feed device can be realized. It has been shown that this can reduce positioning errors when depositing the segments and / or the material web. Should positioning errors nevertheless occur, these could be prevented by the stacking table's ability to perform minimal movements to compensate for positioning errors. Preferably, the stacking table is vertically movable such that the reloading of segments and / or material webs occurs at a constant height during stack formation. The stacking table therefore moves downwards during stack formation to ensure reloading at a constant height. Depositing the segments and / or material webs at a constant height has the advantage of increasing positioning accuracy during stacking of the segments and / or material webs. The vertical mobility also supports the transfer of the finished stack, for example, to a subsequent gripping device with a transport function. During stacking on the stacking table, the newly deposited segment is not covered by a transfer device or similar for a short time window, so that the deposit position of the newly placed segment can be detected, for example, by a corresponding detection device. Furthermore, it is preferred if the device is designed to move the stack after its completion from the stacking table into a winding position and / or into an intermediate position which is provided between the stacking table and the winding position, wherein by moving the stack from the stacking table into the winding position or into the intermediate position, a material web trail that projects beyond the stack is pulled out of the material web feed device, wherein a separating device is provided that is designed to separate this material web trail from the endless material web of the material web feed device, so that the material web trail has a free end, wherein a winding device is provided that is designed to wrap the finished stack with the projecting, free material web trail in the winding position. As a result, as soon as the stack reaches the winding position and thus at the same time a sufficient extraction of the material web, for example in the form of the separator web, has taken place beyond the stacking position to form the material web trail, a new stack can be started by depositing a segment, for example in the form of an anode or cathode sheet, on the material web. If the sufficient length of the material web trail is already reached in the intermediate position, the movement in the intermediate position stops briefly to perform a separating cut using the separating device. The separating cut therefore takes place in the intermediate position. The stack is then transported until it reaches the winding position. Regardless of whether the separating cut takes place in the winding position or in the intermediate position, the stacking process can thus be resumed immediately after a short interruption, which increases the production rate in the manufacture of energy cells, particularly battery cells, for example in the form of Li-ion batteries. Wrapping the stack with the same, continuous, i.e., one-piece, material web can thus be carried out while the stacking process of the subsequent stack has already started. This not only increases throughput, but also It also makes it possible to allow more processing time for the wrapping process, so that higher quality can be achieved. The device preferably comprises a fixing device configured to fix the material web trail wound around the stack by the winding device. Accordingly, the free end of the material web trail can be fixed to the material web trail that is already wound around the stack. Fixing can be achieved, for example, by applying an adhesive or a tape, i.e. an adhesive strip, that is applied to one or both sides by the fixing device. The wrapped stack can thus be finally fixed. The device can, for example, comprise further processing devices, for example a device configured to connect conductor flags of the segments of the formed stack to one another. Furthermore, the device can also comprise testing devices for geometrically checking the stack, the tape, and its position.Finally, devices for weighing, coding and / or labeling the stack may also be provided. Preferably, the device is configured to form a subsequent stack on the stacking table while the stack is being wrapped by the winding device and / or while the material web trail is being separated from the remaining material web. In this way, the winding and stacking processes can be parallelized in time, allowing the overall production speed to be increased. Preferably, the device comprises a material supply which is designed to supply the first and / or the second segment The guide device and the material web feed device are each supplied with an endless web of the corresponding material, which is provided in a wound state as a coil. By creating the possibility of providing the material as a coil, an efficient material supply can be ensured. Furthermore, the separate material supply units are preferably spatially separated from one another in such a way that cross-contamination can be prevented. According to a further development, it is proposed that the material supply of the device comprising a first and a second segment feed device comprises separate units, so that the first and second segment feed devices as well as the material web feed device can each be supplied with continuous webs of different types. For example, the first segment feed device can be supplied with a continuous segment web from which anode blades can be formed by a separating process. Furthermore, for example, the second segment feed device can then be supplied with a continuous segment web from which cathode blades can be formed by a separating process. Furthermore, for example, an endless material web made of a separator material is fed to the material web feed device. It is further proposed that each of the units comprise a coil holder for an outgoing coil and a coil holder for a new coil, with a splicing device being provided with which a free end of an outgoing coil can be connected to a free end of a new coil. This embodiment allows the webs, i.e., the endless segment web and the material web, to be continuously conveyed in principle. In other words, the webs can be The splicing device can be provided as continuous webs. The splicing device can, for example, comprise a connecting device with at least one adhesive applicator configured to connect an outgoing web to a new web. The outgoing web can, for example, be joined butt-to-end with the new web. This can be achieved, for example, by the splicing device comprising a first jaw and a second jaw, which are configured to apply a clamping force to an overlapping section of the outgoing web and the new web provided by the feed device. The connecting device further comprises a cutting device, which is configured to cut the outgoing web and the new web, which are subjected to a clamping force between the jaws, in a common cut through the overlapping section to produce the web end of the outgoing web and the web start of the new web. The first jaw is configured to hold the web end of the outgoing web and the web start of the new web by means of negative pressure when the clamping force of the jaws is released, for application of an adhesive by the adhesive applicator. A butt splice can also be carried out using the following alternative: The splicing device then comprises, for example, at least one adhesive applicator which is designed to connect an outgoing web to a new web. Furthermore, the splicing device comprises a first suction jaw for temporarily holding a section of the outgoing web by means of negative pressure and a second suction jaw for temporarily holding a section of the new web by means of negative pressure, wherein the web end of the outgoing web and the web start of the new web are connected by means of the first and second suction jaws can be positioned relative to one another in a desired alignment, so that the web end and the web start can be connected to one another in the desired alignment by means of the at least one adhesive applicator, wherein in the desired alignment the free end faces of the web end and the web start are arranged one behind the other, i.e. they abut one another. The splice of the separator web is preferably produced in a section of overlapping separator webs without additives by means of an embossed connection. Preferably, when completing the conveying movement, a web edge control device is provided downstream of the splicing device, which is designed to correct the alignment and / or position of an edge of the corresponding endless web if necessary. The web edge control device is therefore arranged downstream of the splicing device with respect to the conveying movement. By means of the web edge control, a correct alignment of one of the web edges or the web center can be ensured. It goes without saying that the control device can comprise a sensor device with which the actual state of the endless web can be detected. This sensor device can, for example, be designed to detect the position and / or alignment of the web edge. Alternatively, it would also be possible to detect the center line of the endless web, because this allows conclusions to be drawn about the position and / or alignment of the web edge.Based on the data thus acquired, the alignment and / or arrangement of the web edge can be corrected accordingly using a correction device. It is further proposed that the first and / or second segment feed device comprise one or more of the following functional units: a testing device configured to test a segment; a detection device configured to detect the presence of a segment, to detect a position, and / or to detect an orientation of a segment on a rotating body; a cleaning device configured to clean a segment; and / or an ejection device configured to eject a segment from the production process. These functional units allow the segments to be inspected, cleaned, and / or ejected on the transport path to the stacking table. It is further proposed that a functional unit comprise two components, wherein the two components are assigned to different rotating bodies of a segment feed device, wherein the two components of a functional unit are assigned to mutually adjacent rotating bodies, or wherein the two components of a functional unit are assigned to two rotating bodies between which an even number of further rotating bodies are arranged. Adjacent rotating bodies transfer segments in such a way that the free upper side of the delivering rotating body is the underside resting on the receiving rotating body. Thus, by transferring from a delivering to a receiving rotating body, the segment is rotated once by 180° with respect to its support surface.Consequently, the proposed arrangement of two components assigned to a functional unit allows the corresponding function, in particular cleaning and / or testing, to be performed on the top and bottom of a segment. The same effect is achieved if a An even number of further rotational bodies are arranged. Preferably, the functional units are assigned to the third conveyor section. This allows the functional units to benefit from the synchronized movement. The rotating bodies are preferably arranged such that a stationary, rotating rotating body is followed by a displaceably mounted rotating body. The displacement preferably occurs in a direction orthogonal to a plane spanned by the rotation axes of the two adjacent, stationary rotating bodies. The displaceable mounting allows the transfer distances between adjacent rotating bodies to be adjusted, for example, to adapt them to a change in the thickness of the segments. The transfer rotating body, from which the segments are transferred to the stacking table by means of the transfer device, forms a stationary, rotating rotating body. This can increase process reliability. Preferably, the segments are fed to the stacking table in the form of anode sheets on the same side of the material web as the stacks are removed from the stacking table. This is advantageous because the first and last segment of the stack is preferably an anode sheet. Therefore, the folding device must move the material web away from the side from which the segments in the form of anode sheets are fed by means of the segment feeding device. Thus, the stack can only be gripped from the side from which the last segment in the form of the anode sheet is fed, for example, by a clamping device of the conveyor carriage. In other words: the stack can only be grasped from the side on which the folding device, in particular a corresponding pair of rollers of the folding device for guiding the material web, is not currently located. According to a second aspect of this application, to achieve the object, a method is proposed for the energy cell producing industry for forming a stack comprising a plurality of segments and a material web, wherein the material web is folded in a zigzag shape and the segments are deposited on the material web such that in the stack the segments are arranged in the folds of the material web, wherein a first and / or a second segment feed device is used to convey segments to a stacking position, wherein the first and / or the second segment feed device each comprise at least one rotational body which is mounted rotatably about a rotational axis and is configured to convey segments by a rotational movement. It is further proposed that when carrying out the method, an endless segment web is fed to each of the first and / or the second segment feed device, wherein the endless segment web is conveyed in a first conveyor section at a constant conveying speed, wherein the endless segment web is conveyed in a clocked manner in a second conveyor section and is divided into segments, and wherein the segments are conveyed in a clocked manner in a third conveyor section. Preferably, the method comprises the following stacking steps: In a stacking step a) a section of the material web is placed over the stacking table or onto a segment lying on the stacking table Subsequently, in a stacking step b), a segment of the first type is placed on the section of the material web placed over the stacking table. Subsequently, in a stacking step c), the material web is placed on the stacking table, forming a fold around the deposited segment. Finally, in a stacking step d), a segment of the second type is placed on the section of the material web lying on the stacking table. To form a complete stack, stacking steps b) and d) are carried out alternately with stacking step c) interposed; this process is then repeated several times. It is further proposed that the material web is a separator, the segment of the first type being an anode sheet and the segment of the second type being a cathode sheet. Preferably, a segment of the first type is deposited as the first segment of the stack by means of method step b), and a segment of the first type is deposited as the last segment of the stack by means of method step b). Thus, by omitting method step d), which actually involves depositing a segment of the second type, a stack can be formed in which the first and last segments are segments of the first type. It is preferred that the segments of the first type are anode sheets. In this way, an asymmetric stack can be formed in which the first and last electrodes are each anode sheets. It is further proposed that after the formation of the stack, a section of the material web protrudes beyond the formed stack, so that a material web trail with a free end is formed, whereby the formed stack is wrapped by means of the material web drag. Preferably, the formation of a stack by folding the material web takes place simultaneously with the wrapping or with the separation of the material web trail of another stack at different positions. Preferably, the proposed method is carried out using the device according to the first aspect of this application, optionally taking into account the preferred further developments explained above. With regard to the technical effects and advantages associated with the proposed method, reference is made to the preceding statements in connection with the device. According to a further aspect of this application, the object is achieved by a device for the energy cell producing industry for forming a stack comprising a plurality of segments and a material web, wherein the device is designed and configured to fold the material web in a zigzag shape and to deposit the segments on the material web such that, in the stack, the segments are arranged in the folds of the material web, wherein the device has the following components: a stacking table on which the stack is formed; a material web feed device designed and configured to convey the material web to the stacking table; a first segment feed device designed and configured to convey segments to the stacking table; and / or a second segment feed device designed and configured to is to convey segments to the stacking table, wherein the first segment feed device has at least one rotary body which is mounted rotatably about a rotation axis and is designed and configured to convey segments by a rotational movement and / or the second segment feed device has at least one rotary body which is mounted rotatably about a rotation axis and is designed and configured to convey segments by a rotational movement. One or more rotational bodies of the first segment feed device may have a circumferential surface and may be designed and configured to receive one or more segments adjacent to its circumferential surface. One or more rotational bodies of the second segment feed device may have a circumferential surface and may be designed and configured to receive one or more segments adjacent to its circumferential surface. The circumferential surface of at least one rotational body of the first segment feed device can extend in the circumferential direction, preferably in a curved shape. The circumferential surface of at least one rotational body of the second segment feed device can extend in the circumferential direction, preferably in a curved form. Rotating bodies on which individual segments are transported can be designed as drums, the outer surface of which has several transport sections on which the segments can be transported. One of several rotation bodies of the first segment feed device can be designed as a transfer rotation body. One of several rotation bodies of the second segment feed device can be designed as a transfer rotation body. The first segment feeding device may comprise a transfer device which is designed and configured to deposit segments on the stacking table. The second segment feeding device may comprise a transfer device which is designed and configured to deposit segments on the stacking table. A rotation body of the first segment feed device can form a transfer rotation body from which a transfer device of the first segment feed device takes over a segment. A rotation body of the second segment feed device can form a transfer rotation body from which a transfer device of the second segment feed device takes over a segment. The first segment feed device can have a transfer device in the form of a pivoting lever SH, which is mounted rotatably about a rotation axis. A transfer device of the first segment feed device can have a vacuum holding system UHS for holding a segment. The second segment feed device can have a transfer device in the form of a pivoting lever SH, which is mounted rotatably about a rotation axis. A transfer device of the second segment feed device can have a vacuum holding system UHS for holding a segment. A vacuum maintenance system UHS can have a vacuum supply line UHSL, which is fluidically connected to the transfer device. A vacuum maintenance system UHS can have a vacuum control station UHSS, which controls the application of vacuum to the transfer device, in particular switches vacuum on or off. A vacuum holding system UHS can have one or more vacuum channels extending into and / or through the transfer device and are preferably provided with openings arranged on an outer boundary surface and / or in the region of an outer boundary surface of the transfer device in order to hold a segment by means of vacuum. A transfer device in the form of a pivot lever SH can be designed as a pivot lever SH, which has a bearing end SHLE and a free end SHFE. At the bearing end SHFE The pivot lever SH is mounted so as to be rotatable about a rotational axis. The bearing end SHFE of the pivot lever SH can have a bearing shaft SHLA for supporting the pivot lever SH about the rotational axis and for rotating or pivoting the pivot lever SH about the rotational axis, preferably by means of an actuator, in particular a motor. One or more vacuum channels UHSK-LA can be arranged in the bearing shaft SHLA. The bearing shaft SHLA can have a connecting piece for connecting one or more vacuum channels UHSK-LA to a vacuum supply line UHSL. A plurality of prongs ZK in the shape of a fork can extend from the bearing end SHFE of the pivot lever SH to the free end SHFE of the pivot lever SH. The prongs can be of equal length or of different lengths. Outer prongs are preferably shorter than inner prongs. The prongs ZK can form a convexly curved supporting surface TF for a segment, in particular in the direction from the bearing end SHLE of the pivot lever towards the free end SHFE of the pivot lever. The convex curvature of the supporting surface can then be seen, for example, in a sectional plane that is aligned orthogonal to the axis of rotation of the pivot lever SH and runs through the supporting surface. The prongs ZK can have flattened boundary surfaces to form the supporting surface TF, preferably designed such that a segment rests flat against a flattened boundary surface, for example a planar boundary surface, at least in partial regions of the segment.On the side opposite the supporting surface TF, the prongs can be concave in the direction from the bearing end SHLE of the pivot lever to the free end SHFE of the pivot lever. The concave curvature of the. The side opposite the wing TF can then be seen, for example, in a sectional plane which is aligned orthogonally to the axis of rotation of the pivot lever SH and runs through the side opposite the wing TF. The distance between the tines ZK of the pivot lever SH can be adapted to recesses of a transfer rotation body, in particular such that the tines ZK of the pivot lever SH can be moved with play relative to recesses of the transfer rotation body. A tine ZK or multiple tines ZK can have one or more vacuum channels UHSK-ZI which extend into and / or through the tine ZK and are preferably provided with openings which are arranged on an outer boundary surface and / or in the region of an outer boundary surface of the tine ZK, in particular on or in a supporting surface TF, in order to hold a segment by means of vacuum. A vacuum channel UHSH-ZI of a tine ZK can be connected to a vacuum channel UHSK-LA of the bearing shaft SHLA of the pivot lever. A vacuum channel UHSH-ZI of a tine ZK can be connected to multiple vacuum channels UHSK-LA of the bearing shaft SHLA of the pivot lever. A vacuum channel UHSK-LA of the bearing shaft SHLA of the pivot lever can be connected to a vacuum channel UHSH-ZI of a tine ZK.A vacuum channel UHSK-LA of the bearing shaft SHLA of the pivot lever can be connected to several vacuum channels UHSH-ZI of a tine ZK or to several vacuum channels UHSH-ZI of several tines ZK. A transfer rotary body may have vacuum channels ÜKK which extend into and / or through the transfer rotary body and are preferably provided with openings which are arranged on an outer boundary surface and / or in the region of an outer boundary surface of the transfer rotary body in order to hold a segment by means of vacuum. A transfer of a segment from a transfer rotary body to a transfer device can be carried out with a gradual switching on and off of the vacuum supply in vacuum channels ÜKK of the transfer rotary body and the vacuum supply in vacuum channels UHSK of the transfer device, in particular the vacuum supply in the vacuum channel UHSK-LA or vacuum channels UHSK-LA of the bearing shaft SHLA of a pivoting lever and in the vacuum channel UHSK-ZI or the vacuum channels UHSK-ZI of the tine ZK or the tines ZK of a pivoting lever. During a transfer of a segment from a transfer rotary body to a transfer device, a negative pressure is applied to the negative pressure channels UHSK of the transfer device at a time A. At the negative pressure channels ÜKK of the transfer rotary body that hold the segment to be transferred, the applied negative pressure is advantageously maintained for a time period TX beyond time A, and only after the expiration of the time period TX is a negative pressure supply to the negative pressure channels ÜKK of the transfer rotary body 41, 42 switched off. During the time period TX, the segment 3 can be held by means of a negative pressure acting via the openings of the negative pressure channels ÜKK of the transfer rotary body and via the openings of the negative pressure channels UHSK of the transfer device. A transfer device can be designed and configured to be externally actuated, in particular by means of an actuator, further in particular by means of a motor, in such a way that a segment can be withdrawn from the transfer rotation body counter to a holding force exerted on the segment by a transfer rotation body. When transferring a segment from a transfer rotary body to a pivoting lever SH, a vacuum is preferably applied to the vacuum channel UHSK-LA or to the vacuum channels UHSK-LA of the bearing shaft SHLA and to the vacuum channel UHSK-ZI or to the vacuum channels UHSK-ZI of the tine ZK or the tine ZK of the pivoting lever SH at a time A. At the vacuum channels ÜKK of the transfer rotary body, which hold the segment to be transferred, the applied vacuum is advantageously maintained for a time period TX beyond time A, and only after the expiration of the time period TX is the vacuum supply to the vacuum channels ÜKK of the transfer rotary body switched off.During the time period TX, the segment can be held by means of a vacuum acting via the openings of the vacuum channels ÜKK of the transfer rotary body and via the openings of the vacuum channel UHSK-ZI or via the openings of the vacuum channels UHSK-ZI of the tine ZK or the tines ZK of the pivot lever SH. A pivot lever SH can be designed and configured to be externally actuated, in particular by means of an actuator, further in particular by means of a motor, such that a segment can be withdrawn from the transfer rotary body against a holding force exerted on the segment by a transfer rotary body. A convexly curved support surface TF of a pivot lever SH for a segment, which can be formed in particular by tines ZK and extends in particular in the direction from a bearing end SHLE of the pivot lever to a free end SHFE of the pivot lever SH, can have a radius of curvature which corresponds to the radius of a transfer rotation body, in particular corresponds to the radius of a transfer rotation body, or does not deviate from the radius of the transfer rotation body by more than 40%, preferably does not deviate by more than 20%, particularly preferably does not deviate by more than 10%. The material web feed device can have a folding device. The folding device can be designed and configured to place a section of the material web over and / or around the respective uppermost segment of the stack located on the stacking table by means of a back-and-forth movement. The back-and-forth movement can take the form of a linear movement or a pivoting movement. The folding device can have a movably mounted pair of rollers through which the material web is guided. The material web can be guided continuously between the rollers of the movable pair of rollers. The movable pair of rollers can be provided so that they can move in an arc over the stacking table. The invention is explained below using preferred embodiments with reference to the accompanying figures. In the figures: Figure 1 is a schematic sectional view of a stack with a Z-fold; Figure 2 is a schematic side view of a device; Figure 3 shows a detailed view of a first unit of a material supply; Figure 4 is a perspective view of a stacking system; Figure 5 is a side view of a stacking system; Figure 6 shows a compensating device of a segment feeding device; Figure 7 shows a compensating device of a material web feeding device; Figure 8 shows a segment feeding device with functional units; Figures 9 to 27 show various manufacturing steps for producing a finished and wound stack; and Figure 28 is a schematic representation of a method for forming a stack. Figure 1 shows a schematic representation of an unfinished stack 2 in the form of a cell stack with a material web 4 which is laid in a Z-shape around segments of the first type 3a and segments of the second type 3b. The stack 2 is formed on a stacking table 6, to which reference will be made below. As shown, the material web 4 lies directly on the stacking table 6. A segment of the first type 3a in the form of an anode sheet then follows from the stacking table 6. The material web 4 wraps around this segment 3a, forming a fold 5. This is then followed by a segment of the second type 3b in the form of a cathode sheet, around which the material web 4 wraps again, forming another fold 5. This type of stacking is then repeated several times until the stack 2 is completed and the material web wraps around the segments 3a and 3b in a zigzag pattern. The last segment 3 is usually a segment of the first type 3a, i.e., an anode sheet, placed on the stack 2. It should also be noted that the fold edges of the folds 5 do not necessarily have to be tapered. Alternatively, the fold edges can also have a radius, so that the material web 4 is laid around the edge of the segments 3a and 3b, forming a bending radius. Figure 2 shows a schematic side view of a device 1 for forming a stack 2 comprising a material supply 29 on a left side and a stacking system 48 on the right side. The material supply 29 comprises three units 36, 37 and 38, which are spatially separated from each other. These three units 36, 37 and 38 can be arranged next to each other as shown in Figure 2, although it is also possible to arrange them one above the other (not shown). The system formed by the units 36, 37 and The material provided by 38 is guided as a continuous web in separate channels (not shown) to the stacking system 48. The channels can be formed, for example, by separating plates. The interior spaces of units 36, 37, and 38 are also spatially separated from one another, preferably even hermetically sealed. By spatially separating units 36, 37, and 38 and the corresponding channels, cross-contamination can be avoided. The first unit 36 ​​provides a continuous segment web 8, from which segments of the first type 3a, in this case anode blades, can be formed by transverse separation. The continuous segment web 8 is formed from a coil 33. When an expiring coil 33a, which is rotatably mounted on a coil holder 39, nears its end, it can be connected by means of a splicing device 30 to the end of a new coil 33b, which is rotatably mounted on a coil holder 40. In this way, a continuous segment web 8 can be formed and supplied to the stacking system 48. Furthermore, the first unit 36 ​​comprises a material storage 49 in the form of a system of dancer rollers to compensate for any delays during splicing. Furthermore, the system of dancer rollers serves the purpose of easily changing the production speed during a start or stop process. The material storage 49 thus acts as a buffer for the respective web. Using the material storage 49, the unwinding speed of the currently unwinding coil 33a and the machine speed of the subsequent stacking system 48 can be adjusted to one another. Especially when the coils 33a and 33b are very large, i.e., have a large mass, Due to their inertia, these can only be moved dynamically with a delay. Such delays are particularly compensated for by the mass storage device 49. The second unit 37 of the material supply 29 is constructed analogously to the first unit 36. However, an endless segment web 8 is provided there, from which segments of a second type 3b, in this case cathode sheets, can be formed by cutting in the transverse direction. A third unit 38 of the material supply 29 is provided between the first and second units 36 and 37. By means of the third unit 38, the material web 4 is also provided in the form of a continuous web. The structure of the unit 39 essentially corresponds to the structure of the first and second units 36 and 37, but it does not comprise a material reservoir 49; however, it can also comprise a material reservoir (not shown) that is significantly smaller than the material reservoir 49 of the first and second units 36 and 37. A further difference from the first and second units 36 and 37 is that the third unit 38 provides a material web 4 in the form of a separator. Furthermore, each of the units 36 to 38 comprises a web edge control device 43 with which the position and / or orientation of a web edge can be controlled. Furthermore, Figure 2 shows that each of the units 36, 37 and 38 comprises a pull roller 52, with which the web guided over it can be conveyed. Maintaining a predefined web tension is particularly important for the reliable functioning of the units arranged directly adjacent to the pull roller 52. The web edge control device 43 is important. In the embodiment shown here, the pull roller 52 is arranged downstream of the web edge control device 43 with respect to the conveying movement. Thus, the respective pull roller 52 ensures that the subsequent device during the conveying movement can also be reliably supplied with the web. In the first and second units 36 and 37, the subsequent devices are the material storage devices 49. The third unit 38 does not itself comprise a material storage device 49. Thus, by means of the units 36, 37 and 38, the endless segment webs 8 and the material web 4 are fed to the stacking system 48 as endless webs. By means of a first segment feed device 11, the endless segment web 8, from which the first type of segments 3a in the form of the anode blades are formed, is fed to the stacking table 6 from the right. By means of a second segment web feed device 12, the endless segment web 8, from which the second type of segments 3b in the form of the cathode blades are formed, is fed to the stacking table 6 from the left. Finally, a material web feed device 10 is provided as a component of the stacking system 48, with which the material web 4 is fed to the stacking table 6. In this way, all materials required to form the stack 2 are provided at the stacking table 6. The material is then transported away from the stacking table 6 to the right. Furthermore, Figure 2 shows that the device 1 is essentially designed as a drum machine, ie the webs and segments 3 are essentially transported on drums. In the embodiment shown here, the transported Segments 3 are held on the drums by the effect of negative pressure. However, it is also possible to hold segments 3 to the drums by mechanical retaining elements (not shown). In the embodiment shown in Figure 2, the product flow from the material supply 29 to the stacking system 48 is from left to right. This allows for a longer, but flatter, design of the device 1. The webs are thus fed continuously from the left to the stacking system 48 by the material supply 29. The material supply 29 and the stacking system 48 have a modular design. Thus, it is fundamentally possible to arrange the material supply 29 entirely above or below the stacking system 48 (not shown). For example, a separate logistics level can be created above or below the stacking system 48, in which new material, preferably in the form of coils 33, 34, and 35, is provided to the material supply 29, and used material, for example, empty coils 33, 34, and 35, can be removed. The logistics level offers the advantage of preventing crossing paths. Furthermore, it is also possible in principle to arrange the units 36, 37 and 38 on different sides of the stacking system 48 in order to feed the corresponding endless webs from different sides (also not shown). The stacks 2 formed by the stacking system 48 are, after completing further processing steps, which are also carried out by grain components of the stacking system 48 are transported away by a discharge device 50. Figure 3 shows a detailed view of the first unit 36 ​​of the material supply 29, which was already shown in Figure 2. A turntable 51 is provided, on which the two coil holders 39, 40 are arranged. In this embodiment, the coil 33a of the outgoing segment web, which has already been largely unwound, is arranged on the coil holder 39. For the production of an endless segment web 8 by the splicing device 30, a new coil 33b with a new segment web has already been placed on the coil holder 40. The segment web of the new coil 33b can therefore be connected to the outgoing segment web of the outgoing coil 33a by the splicing device 30. After the connection, the remainder of the coil 33a with the outgoing segment web can be removed from the turntable 51. The coil 33b with the new segment track, which is placed on the coil holder 40, can rotate with the turntable 51 to the previous position of the coil holder 39.After connecting with the outgoing segment track, the new segment track itself becomes the outgoing segment track. In this way, an endless segment track 8 can be provided to the stacking system 48. This functional principle is also applied to units 37 and 38. The splicing device 30 shown in Figure 3 is designed to butt-join the end of a segmented web of the outgoing coil 33a with the end of the segmented web of the new coil 33b. The two butting ends can be bonded together, for example, by applying an adhesive, for example e.g., in the form of a tape (i.e., an adhesive strip). This type of splicing device 30 is also used in the second unit 37 of the material supply 29 (see Figure 2). The splicing device 30 of the third unit 38 (see Figure 2) is configured to join the free end of the outgoing material web 4 of the outgoing coil 35a to the free end of the material web 4 of the new coil 35b by embossing. The free ends to be joined are initially arranged overlapping and then joined together under pressure by an embossing tool; no additional material, such as adhesive, is required. Figure 4 shows a perspective view of the stacking system 48. It is indicated graphically that a further stacking system 53 is provided behind the stacking system 48 within a housing 54, so that both stacking systems 48 and 53 can be operated in parallel. To avoid contamination, the stacking system 48 is also located within a housing 54, which, however, is shown incompletely in Figure 4. Figure 5 shows a side view of a stacking system 48, which is divided by a dashed line into a first area 55, in which the material is conveyed at a constant conveying speed, and a second area 56, in which the material is conveyed in a clocked movement. In principle, however, it is also possible to convey the material in the first area 55 at an approximately constant conveying speed instead of at a constant conveying speed, ie at a speed whose minimum and maximum speeds do not deviate by more than 20% from the average conveying speed. The clocked movement in the second region 56 is characterized by the fact that several cycles are arranged one after the other, each comprising a rest interval and a movement interval. For example, a cycle can comprise two or more rest intervals. In the rest interval, the movement speed of the material is zero, while in the movement interval the movement speed of the material is not zero. In principle, however, embodiments are also possible in which a movement takes place in the rest interval at a significantly reduced speed compared to the movement interval. In this embodiment, the speed is preferably constant or approximately constant in a sub-interval of the movement interval. The first and second segment feed devices 11 and 12 each comprise at least one separating device 13, with which the endless segment webs 8 can be severed in the transverse direction, so that individual segments 3 are created. In this embodiment, the separating device 13 comprises a cutting drum and a rotatably driven knife shaft with at least one knife. In this embodiment, the cut is made in the movement interval. As an alternative to mechanical cutting with a knife and / or counter edge in a shear cut, the cut can also be made thermally using a laser. In contrast to mechanical cutting, thermal cutting is carried out in the rest interval, i.e. at a standstill. In principle, the thermal cutting can also be carried out in the movement interval. Each of the segment feed devices 11 and 12 comprises three conveyor sections F1, F2, and F3. In the first conveyor section F1, the endless segment web 8 is conveyed at a constant conveying speed. In the second conveyor section F2, the endless segment web 8 is conveyed in a timed motion. In this second conveyor section F2, the endless segment web 8 is separated into separate segments 3. Consequently, in a third conveyor section F3 following the second conveyor section F2, the segments 3 are conveyed in a timed motion. The first segment feed device 11 comprises a plurality of rotating bodies 21, of which, for the sake of clarity, only two are provided with the corresponding reference symbol. The second segment feed device 12 also comprises a plurality of rotating bodies 22, of which only two are also provided with a reference symbol. Finally, the material web feed device 4 also comprises a plurality of rotating bodies 57, of which only one is provided with a reference symbol. All rotating bodies 21 and 22 on which individual segments 3 are transported are designed as drums, the outer surfaces 14 of which each have several transport sections on which the segments 3 can be transported. All rotating bodies of the first and second segment feed devices 11, 12 located in the second region 56 are driven in a clocked movement, so that the segments 3 are also conveyed with a clocked movement. Furthermore, it can be seen that five rotation bodies 21, 22 of the first and second segment feed devices 11 and 12 are arranged in a linear arrangement, which is characterized in that the axes of rotation of the corresponding rotation bodies 21, 22 are located in a plane 58, 59. In order to be able to realize the transition between the first area 55 with continuous conveying movement and the second area 56 with the clocked movement, Figure 5 shows a compensating device 19 of the first segment feed device 11 and a compensating device 9 of the second segment feed device 12. A web edge control device 43 is connected upstream of the compensating devices 9 and 19 with respect to the conveying movement. The transition area between the first and second areas 55, 56 of the second segment feed device 12 is shown in detail in Figure 6. The endless segment web 8 is guided over deflection rollers 61 to the web edge control device 43. Furthermore, a pull roller 64 is provided, which serves to transport the endless segment web 8 and, in cooperation with a roller 63, ensures suitable web tension and web control; this is the prerequisite for crease-free transport and for the functioning of the web edge or web center control. From there, the endless segment web 8 is then fed to the compensating device 9, which comprises a dancer roller 62. In this embodiment, the rotation axis of the dancer roller 62 can perform a linear back and forth movement and thus perform a compensation movement which enables a transition from a constant conveying movement of the endless segment track 8 to a cyclic movement 60 of the endless segment web 8. Alternatively, the back and forth movement can also be performed in a pivoting manner. The movement only needs to be coordinated in such a way that it can compensate for the feed of the endless segment web 8 at a continuous conveying speed and its cyclic release without a change in the web tension or with a minimal change in the web tension. According to a further optional measure, the slippage between the endless segment web 8 and the dancer roller 62 can be prevented by an air cushion. The dancer roller 62 is moved in cycles; the web tension can thus be kept constant. The dancer roller 62 can also be contoured so that the coefficient of friction between the dancer roller 62 and the endless segment web 8 is as high as possible; this can support or reduce the compensating movement.The dancer roller 62 can optionally be actively driven in its rotational movement to prevent slippage between the dancer roller 62 and the endless segmented web 8. Each cycle, the dancer roller 62 is accelerated to a conveying speed and decelerated back to a standstill. Due to this acceleration of the dancer roller 62, it must be designed such that its mass moment of inertia is as low as possible; accordingly, the dancer roller 62 must be designed as light as possible. Thus, the endless segmented web 8 can be conveyed on the roller 63 in a timed movement. In a corresponding manner, the transition from the first region 55 to the second region 56 is implemented in the first segment feed device 11. It is therefore self-evident that the first segment feed device 11 also has a corresponding compensation device 19 whose structure corresponds to that of the compensating device 9. In this way, segments of the first type 3a in the form of anode sheets and segments of the second type 3b in the form of cathode sheets can be inserted alternately into the zigzag-folded material web 4 in a synchronized movement. Figure 7 shows a compensating device 18, which is a component of the material web feed device 10. The compensating device 18 enables the folding movement, which is timed by means of a folding device 15 (see Figure 9), and which requires pivoting a section of the material web 4. With regard to the structure of the compensating device 18 of the material web feed device 10, reference is made to the structure of the compensating devices 19 and 9 of the first and second segment feed devices 11 and 12. The material web feed device 10 further comprises a web edge control device 43, which is arranged upstream of the compensating device 18 with respect to the conveying direction of the material web 4. A tension roller 64 is provided on the conveying path of the material web 4 between the web edge control device 43 and the compensating device 18. Figure 8 shows, using the second segment feed device 12, how functional units can be arranged along the transport path defined by the rotating bodies 22a to 22d. These explanations apply equally to the first segment feed device 11. In Figure 8, segments of the second type 3a are transported in so-called transport sections on the lateral surfaces 14 of the rotation bodies 22 from the top left to the bottom right. two segments of the second type 3b are drawn in Figure 8 and their conveying movement is indicated by dashed lines. A segment 3b held on the rotating body 22a is guided in a clocked movement past a testing device 44, a cleaning device 46, an ejection device 47, a detection device 45 and a further cleaning device 46a, 46b, which comprises two components. The inspection device 44 is configured to inspect a segment 3. In this exemplary embodiment, the inspection device 44 is configured to perform an optical measurement, so that it has an image capture device. Furthermore, a one-sided cleaning device 46 is connected upstream of the inspection device 44, with which the segment 3b to be inspected can be freed of contaminants in advance. The cleaning device 46 can, for example, be configured to clean cut edges. This can ensure that contaminants do not impair the result of the optical inspection. The cleaning and testing take place at a rest interval. Using the inspection device 44, one-sided checks of the segments 3 can be performed, for example, a geometric measurement of outer contour edges. The cleaning device 46 can achieve the cleaning effect, for example, by means of a brush, compressed air, a rotating nozzle, or ionization. The contaminants removed during cleaning, such as dust, can be captured by a collecting and / or suction device and thus removed from the process. Segments 3b can be removed from the production process by means of the ejection device 47. For this purpose, the ejection device 47 is controlled, for example, based on the result of the inspection by the testing device. If a segment 3b has been classified by the testing device 44 as not meeting the quality requirements, it is carefully removed from the production process by means of the ejection device 47. This can be the case, for example, if the surface properties or the geometry of the segment 2 do not meet the specifications. The ejection device 47 comprises an ejection drum 65, which receives a segment 3b to be ejected from the rotating body 22b and places it in a reject reservoir 66, in which the segments 3 ejected by the ejection drum 65 are collected. The transfer of the segment 3b to be ejected from the rotating body 22b to the ejection drum 65 takes place at synchronous speed.Thus, the ejection drum 65 is also moved in a timed manner. In this embodiment, the transfer takes place within the movement interval. The ejection of the segment 3b to be ejected into the reject reservoir 66 can take place within the rest interval, whereby the ejection can then also be carried out by gently depositing the segment 3b to be ejected into the reject reservoir 66, for example, in the form of a tray. This enables the product-friendly removal of segments 3b from the production process. This type of controlled removal of a segment 3b to be ejected prevents particles from becoming detached and being stirred up. The ejection device 47 can also be used to take segment samples. For example, segments 3b taken randomly from the production process can be inspected in detail. By depositing the For example, segment samples can be used to determine the cause of the rejection. Furthermore, targeted segment samples can also be taken, for example, segment samples prepared for this purpose, so that the testing device 44 can be checked or its sensors calibrated. Furthermore, the detection device 45 is provided, with which the presence of a segment 3b in a transport section of a rotating body 21 can be detected. Furthermore, the detection device 45 can also be configured to detect a position and / or an orientation of a segment 3b on a rotating body 22, in particular in the transport section. Furthermore, a cleaning device 46a, 46b comprising two components is provided. Each of the components of the cleaning device 46a and 46b is designed to clean an upper side of a segment 3b. Logically, the side of the segment 3b that rests on the rotating body 22 cannot be cleaned because it is covered by the rotating body 22. For this reason, the two components of the cleaning device 46a and 46b are assigned to the adjacent rotating bodies 22c and 22d. By transferring the segment 3b from the rotating body 22c to the rotating body 22d, the segment 3b is rotated by 180° with respect to its support surface on the respective rotating body 22c, 22d, so that a first side of the segment 3b can be cleaned by the first component of the cleaning device 46a and a second side of the segment 3b can be cleaned by a second component of the cleaning device 46b.The same effect can be achieved if the two components of the cleaning device 46a, 46b are not directly adjacent to each other. rotation bodies 22; in this case, an even number of additional rotation bodies 22 must be provided between the rotation bodies 22 on which the cleaning takes place. This is therefore a two-sided cleaning device 46a, 46b. Similarly, a two-sided inspection device (not shown) can also be provided, with which, for example, the quality of the surfaces, the presence of damage, and / or the presence of wrinkles can be checked. By means of the functional units, it can be ensured that only intact and cleaned segments of the second type 3b are conveyed to the rotating body 22e. The same functional units are also provided in a corresponding manner as a component of the first segment feed device 11. The individual manufacturing steps required to form a fully stacked and wound stack 2 (see, for example, Figures 26 and 27) are explained below using Figures 9 to 27. The direction of rotation of the rotating bodies 21 and 22 is indicated by dashed arrows. Fundamentals of the design of the rotating bodies 21 and 22 as drums and the process of transferring adjacent rotating bodies 21, 22 are explained here. Basically, those rotation bodies 21, 22 of the segment feed devices 11, 12 which transport separate segments 3, i.e. not the endless segment track 8, each have several transport sections in which the segments 3 are held and thus by a rotational movement of the rotation bodies 21, 22 also The transport sections are sections of the lateral surface 14 of the respective rotating body 21, 22. In the embodiment proposed here, the segments 3 are held on or in the respective transport section by means of negative pressure. This means that openings are provided in a surface of the respective transport section, which can be subjected to negative pressure, so that the resulting pressure difference holds the segment 3 in or on the transport section in a manner that protects the product. Alternatively, the use of mechanical holding devices (not shown) is also conceivable. As can be seen, for example, from Figure 9, the first and second segment feed devices 11 and 12 each comprise a plurality of rotating bodies 21, 22 for conveying the separate segments 3 to the stacking table 6. To enable this, the two adjacent rotating bodies 21, 22 must each be configured to transfer segments 3. The segment 3 is delivered by a delivering rotating body 21, 22 and received by a receiving rotating body 21, 22. This is achieved in that at the transfer point the holding force on the segment 3 to be transferred by the receiving rotation body 21, 22 is greater than the holding force of the transferring rotation body 21, 22. The receiving rotation body 21, 22 can simultaneously be a transferring rotation body 21, 22 and transfer the segment 3 to a subsequent rotation body 21, 22 at a further transfer point.In this embodiment, the transfer of a segment 3 from a delivering rotational body 21, 22 to a receiving rotational body 21, 22 takes place within the movement interval. In this case, the rotational body is rolled off. onskörper 21, 22 on each other, without any slippage occurring between the segment 3 to be transferred and the lateral surfaces 14 of the rotating bodies 21, 22 involved in the transfer. The speeds of the rotating bodies 21, 22 involved in the transfer do not have to be constant; for the freedom from slippage, it is only important that the speeds are synchronized such that the circumferential speeds of the two rotating bodies involved are identical at the transfer point. Alternatively, not shown tappets and / or sliders can be provided inside the rotating bodies 21, 22, which are designed to move the transport sections individually radially outwards in order to transfer a segment 3 to a neighboring drum. Furthermore, the position of the segments 3 on the rotating body 21, 22 can be corrected in the circumferential direction by deliberately changing the movement profiles of one or more rotating bodies 21, 22 using a control and / or regulating device (not shown). This is achieved by minimally changing the detent position, i.e. the position in which the segment 3 is located during the detent interval, i.e. in the range of less than one millimeter. This deliberately creates a minimal predefined slip between one or both transferring rotating bodies 21, 22, which causes a position correction of the segment 3 on the receiving rotating body 21, 22. For this purpose, significantly large gaps in the millimeter range are provided between the segments 3 on the drum. By exploiting these gaps, the segment 3 can be brought into the correct position by stopping and / or decelerating the corresponding rotating body 21, 22. Furthermore, position errors of the segments 3 in the direction of the longitudinal axis of the rotation bodies 21, 22 can also be corrected by displacing a rotation body assembly comprising at least one rotation body 21, 22, preferably also in the direction of the rotation axis of the rotation bodies 21, 22. Finally, the alignment of a segment 3 can also be corrected, i.e., if it is rotated relative to its actual alignment. Such a correction of the alignment of a segment 3 can be achieved by rotating a rotating body assembly comprising at least one rotating body 21, 22. In the process, the rotation axis is also adjusted with a rotational movement component. This can be achieved, for example, using a turntable. An actuator is provided for adjustment, which is controlled by a control signal from the control and / or regulating device. The actual position and / or the actual orientation of segment 3 can be detected, for example, by the detection device 45 described above. The actual position and / or the actual orientation is then transmitted as an input variable to the control and / or regulating unit (not shown), so that the need for and degree of an alignment and / or position correction can be determined. The corresponding correction can then be carried out using one or more of the measures described above. Furthermore, individual or all of the rotating bodies 21, 22 of the segment feed devices 11 and / or 12 can also be designed as pitch-changing drums, which is not shown here. This means that the distance between the segments 3 in the circumferential direction direction and / or in the radial direction on the rotating body 21, 22. This allows certain process steps that are carried out on the segments 3 on the rotating body 21 and 22 to be carried out more efficiently. Regarding the design of the pitch change drum, reference is made to DE 10 2021 207 349 A1. There, in Figure 2 and in paragraphs

[0035] until

[0037] a pitch change drum is described in which the transport segments are displaceable in the radial direction. Furthermore, Figure 4 and paragraphs

[0039] until

[0041] a pitch change drum is described in which the transport segments can be moved in the circumferential direction. Figure 9 shows how, in a synchronized movement, the segments of the first type 3a, i.e., the anode sheets, are fed to the stacking table 6 by the first segment feed device 11, and the segments of the second type 3b, i.e., the cathode sheets, are fed to the stacking table 6 by the second segment feed device 12. The first and second segment feed devices 11, 12 are configured such that the segments of the first and second type 3a and 3b are fed to the stacking table 6 on separate conveyor paths, i.e., without the conveyor paths of the first and second segments 3a and 3b crossing. The first and second segment feed devices 11 and 12 feed the segments 3a and 3b alternately to the stacking table 6. Thus, a cycle in which a segment of the first type 3a is fed from the first segment feed device 11 to the stacking table 6 is followed by a further cycle in which a segment of the second type 3b is fed from the second segment feed device 12 to the stacking table 6.The timed feed also allows a cycle to be deliberately skipped, for example, when a segment 3 is removed from the production process by means of the discharge device 47 in the first and / or second segment feed device 11, 12. Skipping a cycle can also be used to form an asymmetric stack 2, in which the first and the last segment 3 in the stack are each formed by a segment of the first type 3a, i.e. by an anode sheet. In this embodiment, the first-type segments 3a are fed from the right, and the second-type segments 3b from the left. However, a reverse feed is also conceivable. The material web 4 in the form of the separator is fed to the stacking table 6 by the material web feed device 10. Figure 9 further shows that both the first and second segment feed devices 11 and 12 each comprise a transfer device 31, 32 in the form of a pivoting lever, each of which is rotatably mounted about a rotation axis. The transfer devices 31 and 32 each receive segments 3a and 3b from a rotating body 21, 22, which are referred to below as transfer rotating bodies 41 and 42. Thus, the segments 3a and 3b are initially conveyed toward the stacking table 6 by means of rotating bodies 21, 22 in the form of transport drums until they reach the last rotating body 21, 22, which forms the transfer rotating body 41, 42. The transfer device 31, 32 then takes the segment 3a, 3b from the transfer rotary body 41, 42 and places the segment 3a, 3b on the stacking table 6. The operation of the transfer devices 31, 32 will be explained in more detail below. The pivot lever can, for example, also include a 4- or 5-joint mechanism and an additional drive (not shown), so that more degrees of freedom are available for designing its movement curve. Furthermore, Figure 9 shows a folding device 15 comprising a static roller pair 68 and a movable roller pair 69. A static roller pair 68, within the meaning of this application, is understood to mean a roller pair whose position of the rotation axes is not adjusted during operation. Accordingly, a movable roller pair 69, within the meaning of this application, is understood to mean a roller pair whose rotation axes can be shifted, so that the material web 4 guided by the movable roller pair 69 can be deflected into different positions. As shown in Figure 9, the movable roller pair 69 allows the deflection of the material web 4 in a type of pendulum motion. Figure 9 also shows that a layer of material web 4 is stretched over the stacking table 6. By deflecting the movable roller pair 69 to the left, the upper side of the material web 4 stretched over the stacking table 6 is kept clear. Figure 10 shows that, by pivoting the transfer device 31, a segment of the first type 3a can be placed on the stacking table 6, more precisely, on the material web 4 stretched over the stacking table 6. The rotary transfer body 41 of the first segment feed device 11 has recesses 67. The outer contour of the associated transfer device 31 is designed such that, when receiving a segment of the first type 3a, the transfer device 31 engages in the recesses 67 of the rotary transfer body 41. By means of the transfer device 31, the segment 3a is thus taken over by the rotary transfer body 41 by a combing movement and can thus be deposited in a precisely positioned manner on the stacking table 6. In Figure 11, the transfer device 31 is again engaged with the recesses 67 of the transfer rotation body 41. During the rest phase, the transfer device 31 can then again accept another segment of the first type 3a. The transfer device 31 performs a back-and-forth movement during the process of picking up a new segment 3a and delivering the segment 3a to the stacking table 6. The segment of the first type 3a deposited in a precisely positioned manner on the stacking table 6 can be recognized by the upward pivoting movement of the transfer device 31. At this moment, the edges of the stack 2 are detected and evaluated by cameras (not shown), preferably by exactly four cameras, for positioning control on the stacking table.If the position of the edges does not correspond to a target value, i.e., a faulty stack is detected, the stacking process is aborted by pausing the segment feeders 11 and 12 and ejecting the partial stack. A new stack 2 is then formed. In order for the segment of the first type 3a deposited by the transfer device 31 to remain in the position shown in Figure 11, a hold-down device 7, not shown in Figure 11, is provided, which will be explained in detail later with reference to Figures 19 and 20. Figure 12 shows the removal of the segment of the second type 3b from the transfer rotary body 42 of the second segment feed device 12 by means of the transfer device 32 and the depositing on the stacking table 6. This occurs exactly as with the segments of the first type 3a, which are fed by the first segment feed device 11. Accordingly, reference is made to the relevant explanations. In Figure 12, the transfer device 32, in the form of a pivoting lever, engages the recesses 67 of the transfer rotation body 42. Due to this bifurcation of the transfer device 32 into the transfer rotation body 42, the second type segment 3b is received by the transfer device 32 in the locking interval. At this time, the transfer device 32 is also engaged with the transfer rotation body 42 assigned to it. Figure 13 shows how the segment of the second type 3b is placed in a precise position on the stacking table 6 by means of the transfer device 32. Figure 14 shows how the transfer device 32 pivots upward again after the second type segment 3b has been deposited on the stacking table 6, so that its outer contour again engages the recesses 67 of the transfer rotation body 42. The transfer device 31 remains in the position in which it engages with the recesses 67 of the transfer rotation body 41. In this way, the segments of the first and second type 3a and 3b can be deposited alternately, i.e., the segments of the first type 3a from the right and the segments of the second type 3b from the left, on the stacking table 6. Furthermore, the depositing of the segments of the first and second type 3a and 3b can be carried out alternately, starting with a segment of the first type 3a in the form of an anode sheet. The last segment 3 placed on stack 2 is also a segment of the first type 3a, i.e. an anode sheet. In order to ensure the mutual and alternating deposition of the segments of the first and second type 3a and 3b, stop during the de- taking a segment of the first type 3a from the transfer rotary body 31, the remaining rotary bodies 21 of the first segment feed device 11 also take up the segments of the first type 3a; they only convey the next segment of the first type 3a back to the receiving point of the transfer rotary body 41 when the transfer device 31 again engages in the recesses 67 of the transfer rotary body 41. During the deposit of a segment of the first type 3a by means of the transfer device 31 onto the stacking table 6, a segment of the second type 3b is positioned by means of the rotary body 22 of the second segment feed device 12 in such a way that it is located on the transfer rotary body 42 in a delivery point from which the transfer device 32 can receive the segment of the second type 3b. By alternately preparing, removing, and depositing the segments of the first and second type 3a and 3b by means of the first and second segment feed devices 11 and 12, a high deposition rate of the segments 3 can be achieved. Figure 15 shows in detail the depositing of a segment of the first type 3a on the stacking table 6 by the transfer device 31. In order to ensure that the segment 3a and also a segment of the second type 3b are always deposited at the same height despite increasing stack heights, a lifting device 70 is provided, with which the stacking table 6 can be adjusted in the vertical direction. In addition, the stacking table 6 can be designed to be horizontally displaceable and / or rotatable about a vertical axis in order to correct positioning errors detected on the drum transport path. After a segment of the first or second type 3a and 3b has been deposited on the stacking table 6, the lifting device 70 lowers the stacking table 6 by the height of the last deposited segment 3 and the height of the last deposited material web 4. By lowering the stacking table 6 layer by layer, the depositing height for the depositing of all segments remains 3 constant, so that the transfer devices 31 and 32 can each perform a constant depositing movement. With reference to Figures 16 to 18, it is explained below how the material web 4 is guided in a zigzag shape around the segments 3 deposited on the stacking table 6 by means of the transfer devices 31. Figure 17 shows that the material web 4 is fed from above to the stacking table 6 by means of the material web feed device 10. The material web 4 is guided centrally between the transfer rotary bodies 41 and 42 to the stacking table 6. The stacking table 6 and the two transfer rotary bodies 41 and 42 define a folding space 20 in which the material web 4 can perform a folding movement guided by the folding device 15. In Figure 16, the material web 4 is deflected to the left, i.e., toward the transfer rotary body 31, by the movable roller pair 69 of the folding device 15. This occurs by utilizing the folding space 20 because the material web 4 is guided to just before the transfer rotary body 42. This creates sufficient space for the depositing movement of the transfer device 31. The deflection angle of the material web 4 is defined by the static roller pair 68 and the position of the movable roller pair 69. Figure 17 shows the position in which the material web 4 is deflected to the right, i.e., in the direction of the transfer rotary body 31, by means of the movable roller pair 69. Due to the movement of the movable roller pair 69, a section 16 of the material web 4 is firstly folded around the First, a segment of the first type 3a (see Figure 16) is placed. Second, sufficient space is created so that a segment of the second type 3b can be placed on the stack 2 by means of the transfer device 32; see Figure 18. After the segment of the second type 3b has been placed on the stacking table 6, as shown in Figure 18, the movable roller pair 69 is moved again in the direction of the transfer rotary body 42, so that the material web 4 is also guided around the segment of the second type 3b, forming a fold 5 (see Figure 1). By the back and forth movement of the movable roller pair 69, as shown in Figures 16 to 18, the material web 4 can be laid in a zigzag pattern around the alternately deposited segments of the first and second type 3a and 3b. In the embodiment shown here, the movable roller pair 69 is moved back and forth in a linear movement. As an alternative to the linear movement, the movable roller pair 69 can also be moved in an arc over the stacking table 6. An arc-shaped movement has the advantage that an additional distance can be created between the movable roller pair 69 and the stacking surface during the movement. This prevents a collision with a hold-down device 7 (see Figures 19 and 20). The back and forth movement of the movable roller pair 69 takes place independently of the form of movement by means of an actuator (not shown). Furthermore, Figure 18 shows that the material web feed device 10 comprises the compensation device 18, which is designed to compensate for any slack in the material web 4 that could occur due to the back and forth movement of the movable roller pair 69. The web tension of the material web 4 is thus maintained by the compensating device 18. For this purpose, the compensating device 18 comprises a dancer roller 72, the functioning of which is similar to that of the dancer roller 62 of the second segment feed device 12 (see Figure 6). Instead of the dancer roller 62, the compensating device 18 can also have a different type of buffer or an eccentric. The structure and operation of the hold-down device 7 are explained below with reference to Figures 19 and 20. The hold-down device 7 comprises four hold-down fingers, two of which are assigned to a first hold-down finger pair 73 and the two remaining to a second hold-down finger pair 74. The two hold-down fingers of the first and second hold-down finger pairs 73 and 74 are operated synchronously. The hold-down fingers are designed to secure the uppermost segment 3 of the stack 2 currently being formed on the stacking table 6 immediately after it has been deposited by the transfer device 31, 32. The hold-down fingers of the first and second hold-down pairs 73, 74 can be in a hold-down position or a release position in pairs. Thus, if the first hold-down pair 73 is in the hold-down position, both of its hold-down fingers secure the uppermost segment 3. If the first hold-down pair 73 is in the release position, this fixation of the uppermost segment 3 is released. The same applies to the second hold-down pair 74. Each of the hold-down fingers comprises an edge around which the material web 4 is looped during folding. This edge protrudes in the The holding position extends over the long edge of the uppermost segment 3 in such a way that the material web 4 rests against the edge of the hold-down finger when the fold is formed. In other words, the hold-down finger is positioned with a defined overhang relative to the stack 2. This prevents the material web 4 from being folded directly around the edge of the uppermost segment 3 and ensures a defined wrap. As a result of the movement of the movable roller pair 69, the material web 4 folds alternately around the first and second pair of hold-down fingers 73 and 74. The first pair of hold-down fingers 73 is designed to secure a segment of the first type 3a that is deposited by the transfer device 31. In contrast, the second pair of hold-down fingers 74 is designed to secure a segment of the second type 3b that is deposited by the transfer device 32. For this purpose, the first pair of hold-down fingers 73, in the hold-down position, projects beyond the uppermost segment 3 on the long side facing the transfer device 32. Accordingly, the second pair of hold-down fingers 74, in the hold-down position, projects beyond the uppermost segment 3 on the long side facing the transfer device 31. The fixing of the uppermost segment 3 takes place alternately and overlapping in time with the respective transfer device 31 or 32, which only moves back again when the first or second pair of hold-down fingers 73, 74 fixes the respective uppermost segment 3. In other words: After the deposit of a segment of the first type 3a on the stacking table 6 by the transfer device 31 of the first segment feed device 11, the deposited segment of the first type 3a is fixed by the first pair of hold-down fingers 73 arranged here on the left (see Figure 19). The material web 4 swings guided by the movable pair of rollers 69 of the folding device 15 to the right-hand side, i.e. in the direction of the transfer device 31, so that the left-hand folded edge of the material web 4 is formed. After a segment of the second type 3b has been deposited on the stacking table 6 by the transfer device 32 of the second segment feed device 12, the deposited segment of the second type 3b is secured by the second pair of hold-down fingers 74 arranged here on the right (see Figure 20). The material web 4 then swings back to the left-hand side, i.e. in the direction of the transfer device 32, so that the right-hand folded edge of the material web 4 is formed. Only after the segment of the second type 3b has been securely secured by the second pair of hold-down fingers 74 is the first pair of hold-down fingers 73 pulled out of the stack 2, i.e. brought into the release position.Due to this temporal overlap of the first and second hold-down finger pairs 73 and 74 in the fixing position, a fixing of the segments 3 previously deposited on the stack 2 and of the stack 2 itself is ensured at all times. Figure 21 shows the stacking system 48 after the last segment 3 has been deposited, which in this embodiment is a segment of the first type 3a, i.e., an anode sheet. A stack change then takes place, i.e., the removal of the completed stack 2 from the stacking table 6 by means of a conveyor carriage 75. This frees the stacking table 6 for the formation of the subsequent stack 2. The stacking table 6 and the conveyor carriage 75 are designed such that, when the completed stack 2 is picked up from the stacking table 6, they are forked, i.e., engaged. In this way, the stacking table 6 only needs to be lifted minimally by the lifting device 70 in order to transfer the completed stack 2 to the conveyor carriage 75. Due to the fork-like design, tion of stacking table 6 and conveyor carriage 75, the conveyor carriage 75 protrudes laterally from the fork with the stacking table 6. The conveyor carriage 75 comprises a clamping device 76 configured to apply a clamping force to the finished stack 2. In this way, stack 2 can be safely transported to a winding position 23 under the action of the clamping force. Figure 22 shows that during the transport of stack 2 from stacking table 6 to winding position 23, material web 4 continues to be drawn off from material web feed device 10, forming a material web trail 24. This material web trail 24 is subsequently used to wrap the finished stack 2 in winding position 23 by means of a winding device 27. Figure 23 shows that the formation of a new stack 2 on the stacking table 6 can begin, i.e., with the placement of a segment of the first type 3a, as soon as the required length of the material web trail 24 has been pulled out of the material web feed device 10. The required length of the material web trail 24 refers to the length of material web 4 required in the winding position to wrap the stack 2 with a predefined wrapping degree. The length of the material web trail 24 is defined by the distance between the stacking table 6 and the winding device 27. Alternatively, an intermediate position can also be provided between the stacking table 6 and the winding position 23, in which the stack transport is briefly stopped as soon as the desired length of the material web trail 24 is reached.In this intermediate position, the material web drag 24 can then be fixed by means of a suction bar 78 (see Figure 24) and separated from the rest of the material by means of a separating device 25 (see Figure 24). web 4 is separated. Stack 2 is then transported further with the separated material web 24c to the winding position 23. Figure 24 shows the cutting of the material web 4 by means of a cutting device 25. In the embodiment shown here, the cutting device 25 comprises a blade 79 coupled to a suction bar 78. One can therefore speak of a suction cutting device designed as a carriage, in which the suction bar 78 is integrated into the cutting device 25. In principle, however, it is also possible to position and move the cutting device 25 separately from the suction bar 78. The cutting device 25 then comprises, for example, a guide in which the blade 79 can be displaced transversely relative to the material web 4. The guide is provided in the suction bar 78. The movement of the blade 79 within the guide is effected by means of a blade actuator (not shown). However, according to an alternative embodiment (not shown), the cutting device 25 can also be configured for hot-wire cutting. Furthermore, a cutting device 25 comprising an ultrasonic blade can also be used. The suction bar 78 is mounted so as to be movable relative to the material web 4 in both the transverse and longitudinal directions, with the movement of the suction bar 78 being effected by one or more suction bar actuators (not shown). Furthermore, the suction bar 78 has a plurality of vacuum openings, which serve to fix the material web 4 to the suction bar 78 through the effect of negative pressure. The suction bar 78 may alternatively or additionally also have mechanical holding means. If the suction bar 78 has only mechanical holding means, it can also be referred to as a holding bar. The suction separation device works as follows: After the material web drag 24 has been pulled out, the suction bar 78 is moved transversely with respect to the material web 4 so that the suction bar 78 is arranged beneath the material web 4 across the entire width of the material web 4. Alternatively, the suction bar 78 can also wait beneath the material web drag 24 and then be moved upwards. In this state, the vacuum openings are subjected to negative pressure so that the material web 4 is fixed by the suction bar 78. In this fixed state, the blade 79 is guided transversely through the material web 4 so that the material web 4 is cut into two parts, namely a part that is used for zigzag folding during the formation of the subsequent stack 2 on the stacking table 6, and a final part with the material web drag 24, which is used for winding the stack 2 in the winding position 23 by means of the winding device 27.The cutting of the material web 4 takes place in parallel or approximately parallel, i.e. with a minimal time delay, to the stack formation of the next stack 2 on the stacking table 6. By parallelization, the number of stacks 2 formed per unit of time can be increased. Figure 25 shows the process of wrapping the stack 2 with the material web trail 24 by a rotational movement of the stack 2 around a rotation axis which is transverse to the material web 4. For this purpose, the winding device 27 comprises two clamping jaws 80, which can be brought into contact with the front side of the stack 2 in order to hold it by means of a clamping force. By rotating the clamping jaws 80, the stack 2 can be rotated about its longitudinal axis. During this winding process, the material web trail 24 is consumed. The rotating, cuboid-shaped stack 2 causes a swelling, i.e., discontinuous, pulling movement of the material web trail 24. A free end 26 of the material web trail 24 is guided in a defined manner by an adapted displacement of the suction bar 78 toward the winding position 23, whereby the vacuum openings are maintained under negative pressure until the material web trail 24 is completely wound around the stack 2. By holding the free end 26 of the material web trail 24 by the suction bar 78 and its adapted tracking movement, a defined web tension can be maintained during the winding process. The winding process also takes place in parallel with the formation of a new stack 2 on the stacking table 6.Thus, the required interruption of the stacking process for stack changing is defined only by the movement of the suction bar 78 when pulling the material web trail 24 and by the retraction of the suction bar 78. The changeover time can thus be minimized and the overall output of stacks 2 increased. As an alternative to a defined, active tracking movement of the suction bar 78, the free end 26 of the material web trail 24 can also be pulled with a defined tensile stress, i.e., with the tensile force exerted on the free end by the torque of the winding device 27; this can then be referred to as a torque-controlled tracking movement. After the material web trail 24 has been completely wound up, the vacuum openings of the suction bar 78 are depressurized so that the free end 26 is no longer secured by the suction bar 78. Finally, the suction bar 78 is moved back to the starting position shown in Figure 24 to be ready for the cutting and securing of a new section of the material web 4. After the material web trail 24 has been wound around the stack 2 by the winding device 27, the wrapped stack 2 is transported by means of the conveyor carriage 75 from the winding device 27 to a fixing device 28. In Figure 26, two conveyor carriages 75 and 77 are provided. A first conveyor carriage 75 serves to transport a stack 2 from the stacking table 6 to the winding device 27, while a second conveyor carriage 77 serves to transport a stack 6 from the winding device 27 to the fixing device 28. The two conveyor carriages 75 and 77 are moved in parallel over time, i.e., while a segment 3 is being transported from the stacking table 6 to the winding device 27, a segment 3 is simultaneously being transported from the winding device 27 to the fixing device 28. Alternatively, the two conveyor carriages 75 and 77 can also be replaced by two independent systems that perform similar movements virtually in parallel over time, but are self-sufficient. The fixing device 28 shown in Figure 26 is designed to fix the wound material web 24, more precisely the outer winding. For this purpose, the fixing device 28 in the embodiment presented here is designed to Fixing the material web trail 24, one or more tapes, i.e., adhesive strips, are applied. Furthermore, the fixing device 28 also comprises two clamping jaws 81 for applying a clamping force to the front of the wrapped stack 2 to hold it in place after the wrapped stack 2 has been fed to the fixing device 28 by the second conveyor carriage 77. The application of tape strips, i.e., adhesive strips, is carried out by a stamp at a standstill or by a pair of rollers 82 while the wrapped stack 2 is being moved by the fixing device 28. According to an alternative embodiment of the stacking system 48, it is also possible to apply the tape strips by fingers; this can also be carried out during a movement or while the stack 2 is at a standstill. The fixing process takes place both in parallel with the stacking process on the stacking table 6 and in parallel with the winding process in the winding device 27. The first and second type segments 3a and 3b used in this exemplary embodiment have conductor tabs 83a and 83b, which are schematically illustrated in Figure 27. In the process, a device (not shown) is provided downstream of the fixing device 28, with which the conductor tabs 83a of the first type segments 3a can be connected to one another, and in the same way the conductor tabs 83b of the second type segments 3b can be connected to one another. The first and second type conductor tabs 83a and 83b protrude from the front of the stack 2. By connecting the conductor tabs 83a and 83b to one another, the stack 2 is additionally fixed. Like the winding and fixing, this process step takes place in parallel with the stacking in a downstream unit. Furthermore, Figure 27 shows a third conveyor carriage 84, which is configured to transport a stack 2. With the third conveyor carriage 84, a stack 2 can be conveyed from the fixing device 28 or from the device (not shown) for connecting the conductor flags 83a and 83b to one another to the discharge device 50. The removal device 50 comprises a removal device 85 and a conveyor belt 71. The removal device 85 is designed in the form of a pivoting lever with which the stack 2 can be removed from the third conveyor carriage 84 and transferred to the conveyor belt 71. It goes without saying that the removal device 50 can also be designed differently. The three conveyor carriages 75, 77, and 84 are interconnected by a frame-like connecting structure 17, so that the three conveyor carriages 75, 77, and 84 are moved uniformly. Due to the cyclical movement profile of the conveyor carriages 75, 77, and 84 within a cycle thus ensured, several processing units, in this case the winding device 27 and the fixing device 28, are simultaneously supplied with a stack 2. Of course, more than three conveyor carriages 75, 77, and 84 can be provided, which are then connected to the connecting structure 17. Accordingly, further processing units can also be provided, to which stacks 2 can be fed by means of the additional conveyor carriages and can be removed from there again accordingly. From the conveyor belt 86, the wrapped and taped stacks 2 can then be fed to one or more downstream process steps. Such a process step can, for example, be reweighing using a scale (not shown). Based on the determined mass of the After the wrapped and taped stack 2 has been inspected, the quality of stack 2 can be assessed, which determines whether stack 2 remains in the production process or is rejected as a defective stack 2. Of course, further, additional quality controls of stack 2 can be performed downstream in the production process. In principle, in contrast to the exemplary embodiment shown in Figures 2 to 27, only the first or the second segment feed device 11 or 12 can be provided, i.e. only a single segment feed device 11 or 12. In this case, the material web 4 could already be coated with individual segments of the first or second type 3a or 3b when it is fed to the stacking table 6. Only one segment 3 of a different type then needs to be fed to the stacking table 6 by the corresponding segment feed device 11 or 12. In this way, a battery cell can also be formed with only one segment feed device 11 or 12, in which the separator web wraps alternately around an anode sheet and a cathode sheet in a zigzag pattern. Figure 28 schematically shows a method 99 for forming a stack 2. In explaining this method, reference is made to the device 1 described above. In a method step 100, segments of the first and second type 3a and 3b as well as the material web 100 are fed to a stacking table 6. There, the stacking steps a) to d) are then carried out. In the stacking step a), a section of the material web 4 is placed directly above the stacking table 6. Subsequently, in the stacking step b), a segment of the first type 3a is placed on the stacking table 6 laid section of the material web 4. Subsequently, in a stacking step c), the material web 4 is laid on the stacking table 6, forming a fold 5 around the laid segment 3. Subsequently, in a stacking step d), a segment of the second type 3b is laid on the section of the material web 4 lying on the stacking table 6. In this way, a stack 2 is created as shown schematically in Figure 1. In order to increase the stack height, stacking step c) follows again after stacking step d), see arrow 107. This is followed alternately by stacking steps b) and d), see arrows 108, in each case with stacking step c) interposed. After the stack 2 has reached the desired stack height, the material web trail 24 is formed in a process step 102. In a method step 103, the material web 4 is then separated by means of the separating device 25 and in the method step 104, it is wound by means of the winding device 27. The method step 100 of stacking and the method steps 103 and 104 of separating and winding take place in parallel, which is illustrated graphically in Figure 28 by the arrangement of these method steps next to one another. This is followed by the fixing process step 105, which also takes place in parallel with steps 103 and 104 as well as 101. Further processing steps, such as the previously described connection of the conductor lugs 83a and 83b, are not shown here for the sake of simplicity. Finally, in a method step 106, the wrapped and tagged stack 2 is removed by means of the removal device 50. The method step 106 takes place in parallel to the preceding method steps 101, 103 and 104 as well as 105. A further embodiment of the device 1 is explained below, particularly with reference to Figure 15. For further details, reference is made to the preceding explanations. This is a device 1 for the energy cell producing industry for forming a stack 2 comprising a plurality of segments 3 and a material web 4. The device 1 is designed and configured to fold the material web 4 in a zigzag shape and to place the segments 3 on the material web 4 in such a way that in the stack 2 the segments 3 are arranged in the folds 5 of the material web 4. The device 1 comprises the following components: a stacking table 6 on which the stack 2 is formed; a material web feed device 10 which is designed and configured to feed the material web 4 to the stacking table 6; a first segment feed device 11, which is designed and configured to convey segments 3 to the stacking table 6; and a second segment feed device 12, which is designed and configured to convey segments 3 to the stacking table 6. The first segment feed device 11 has a plurality of rotational bodies 21 which are mounted rotatably about a rotational axis and which are each designed and configured to convey segments 3 by a rotational movement. The second segment feed device 12 also has a plurality of rotational bodies 22 which are mounted rotatably about a rotational axis and which each designed and configured to convey segments 3 by a rotational movement. The rotation bodies 21 of the first segment feed device 11 each have a circumferential surface and are designed and configured to receive one segment 3 or several segments 3 in contact with their circumferential surface. The rotation bodies 22 of the second segment feed device 12 each have a circumferential surface and are designed and configured to receive one segment 3 or several segments 3 in contact with their circumferential surface. The circumferential surface of the rotation body 21 of the first segment feed device 11 extends in the circumferential direction, preferably in a curved shape. The circumferential surface of the rotation body 22 of the second segment feed device 12 extends in the circumferential direction, preferably in a curved shape. The rotating bodies 21, 22, on which individual segments 3 are transported, are each designed as a drum, the outer surface 14 of which has a plurality of transport sections on which the segments 3 are transported. The last rotation body 21 of several rotation bodies 21 of the first segment feed device 11 in the conveying direction is designed as a transfer rotation body 41. The last rotation body 22 of several rotation bodies 22 of the second segment feed device 12 in the conveying direction is designed as a transfer rotation body 42. The first segment feed device 11 has a transfer device 31 which is designed and configured to deposit segments 3 on the stacking table 6. The second segment feed device 12 has a transfer device 32 which is designed and configured to deposit segments 3 on the stacking table 6. The last rotation body 21 of the first segment feed device 11 in the conveying direction forms the transfer rotation body 41, from which the transfer device 31 of the first segment feed device 11 takes over a segment 3. The last rotation body 22 of the second segment feed device 12 in the conveying direction forms a transfer rotation body 42, from which the transfer device 32 of the second segment feed device 12 takes over a segment 3. Figure 15 shows that the first segment feed device 11 has a transfer device 31 in the form of a pivoting lever SH, which is mounted rotatably about a rotation axis. The transfer device 31 of the first segment feed device 11 has a vacuum holding system UHS for holding a segment 3. Figure 15 shows that the second segment feed device 12 has a transfer device 32 in the form of a pivoting lever SH, which is mounted rotatably about a rotation axis. The transfer device 32 of the second segment feed device 12 has a vacuum holding system UHS for holding a segment 3. The vacuum maintenance system UHS has a vacuum supply line UHSL, which is fluidically connected to the respective transfer device 31 and 32. The vacuum maintenance system UHS has a vacuum control station UHSS, which controls the application of vacuum to the respective transfer device 31, 32, in particular switches vacuum on or off. The vacuum holding system UHS has one or more vacuum channels UHSK which extend into and / or through the transfer devices 31, 32 and are preferably provided with openings which are arranged on an outer boundary surface and / or in the region of an outer boundary surface of the transfer device 31, 32 in order to hold a segment 3 by means of vacuum. The transfer device 31, 32 shown in Figure 15 is designed in the form of a pivot lever SH, which has a bearing end SHLE and a free end SHFE. At the bearing end SHFE, the pivot lever SH is rotatably mounted about a rotation axis, see Fig. 15. The bearing end SHFE of the pivot lever SH has a bearing shaft SHLA for supporting the pivot lever SH about the Rotation axis and for rotating or pivoting the pivot lever SH about the rotation axis by means of an actuator, which in this embodiment is designed as a motor. One or more vacuum channels UHSK-LA are arranged in the bearing shaft SHLA. The bearing shaft SHLA has a connection piece for connecting one or more vacuum channels UHSK-LA to a vacuum supply line UHSL. Several prongs ZK extend in the shape of a fork from the bearing end SHFE of the pivot lever SH to the free end SHFE of the pivot lever SH. In the embodiment shown in Figure 15, the prongs are of equal length. In principle, according to another embodiment, they can also be of different lengths; in this case, for example, outer prongs are shorter than inner prongs. Figure 15 shows that the tines ZK form a convexly curved supporting surface TF for a segment 3, namely in the direction from the bearing end SHLE of the pivot lever towards the free end SHFE of the pivot lever. The convex curvature of the supporting surface can be seen in a sectional plane that is aligned orthogonally to the rotation axis of the pivot lever and runs through the supporting surface. To form the supporting surface TF, the tines ZK have flattened boundary surfaces that are designed such that a segment 3, at least in partial areas of the segment 3, rests flat against a flattened boundary surface, here a flat boundary surface. On the side opposite the supporting surface TF, the tines are concave in the direction from the bearing end SHLE of the pivot lever towards the free end SHFE of the pivot lever. The concave curvature of the supporting surface TF The opposite side can be seen in a sectional plane that is aligned orthogonally to the rotation axis of the pivot lever and runs through the supporting surface. The distance between the prongs ZK of the pivot lever SH is adapted to the recesses 67 of the respective transfer rotation body 41, 42, in such a way that the prongs ZK of the pivot lever SH are movable with play relative to the recesses 67 of the respective transfer rotation body 41, 42. One of the tines ZK or several of the tines ZK have one or more vacuum channels UHSK-ZI which extend into and / or through the tine ZK and are provided with openings which are arranged on an outer boundary surface and / or in the region of an outer boundary surface of the tine ZK, namely on or in a supporting surface TF, in order to hold a segment 3 by means of vacuum. A vacuum channel UHSH-ZI of a tine ZK is connected to a vacuum channel UHSK-LA of the bearing shaft SHLA of the pivot lever. A vacuum channel UHSH-ZI of a tine ZK can also be connected to several vacuum channels UHSK-LA of the bearing shaft SHLA of the pivot lever. A vacuum channel UHSK-LA of the bearing shaft SHLA of the pivot lever can be connected to a vacuum channel UHSH-ZI of a tine ZK.A vacuum channel UHSK-LA of the bearing shaft SHLA of the pivot lever can be connected to several vacuum channels UHSH-ZI of a tine ZK or to several vacuum channels UHSH-ZI of several tines ZK. The transfer rotary bodies 41, 42 have vacuum channels ÜKK which extend into and / or through the transfer rotary body 41, 42 and are provided with openings which are located on an outer boundary surface and / or in the region of an outer boundary. tion surface of the transfer rotation body 41, 42 are arranged to hold a segment 3 by means of negative pressure. A transfer of a segment 3 from a transfer rotary body 41, 42 to a transfer device 31, 32 takes place with a stepped switching on and off of the vacuum supply in vacuum channels ÜKK of the transfer rotary body 41, 42 and the vacuum supply in vacuum channels UHSK of the transfer device 31, 32, namely the vacuum supply in the vacuum channel UHSK-LA or vacuum channels UHSK-LA of the bearing shaft SHLA of a pivoting lever and in the vacuum channel UHSK-ZI or the vacuum channels UHSK-ZI of the tine ZK or the tines ZK of a pivoting lever. During a transfer of a segment 3 from a transfer rotary body 41, 42 to a transfer device 31, 32, a negative pressure is applied to the negative pressure channels UHSK of the transfer device 31, 32 at a time A. At the negative pressure channels ÜKK of the transfer rotary body 41, 42 that hold the segment 3 to be transferred, the applied negative pressure is maintained for a time period TX beyond time A, and only after the time period TX has elapsed is the negative pressure supply to the negative pressure channels ÜKK of the transfer rotary body 41, 42 switched off. During the time period TX, the segment 3 is held by means of a negative pressure acting via the openings of the negative pressure channels ÜKK of the transfer rotary body 41, 42 and via the openings of the negative pressure channels UHSK of the transfer device 31, 32.A transfer device 31, 32 is designed and configured to be externally actuated, namely by means of an actuator in the form of a motor, such that a segment 3 can be moved counter to a direction applied from one segment to the segment 3 by a transfer device. berotationskörper 41 , 42 exerted holding force can be deducted from the transfer rotation body 41 , 42. When a segment 3 is transferred from the transfer rotary body 41, 42 to the pivoting lever SH 31, 32, at a time A a vacuum is applied to the vacuum channel UHSK-LA or to the vacuum channels UHSK-LA of the bearing shaft SHLA and to the vacuum channel UHSK-ZI or to the vacuum channels UHSK-ZI of the tine ZK or the tines ZK of the pivoting lever SH 31, 32. At the vacuum channels ÜKK of the transfer rotary body 41, 42, which hold the segment 3 to be transferred, the applied vacuum is maintained for a time period TX beyond the time A and only after the expiry of the time period TX is the vacuum supply to the vacuum channels ÜKK of the transfer rotary body 41, 42 switched off.During the time period TX, the segment 3 is held by means of a vacuum acting via the openings of the vacuum channels ÜKK of the transfer rotary body 41, 42 and via the openings of the vacuum channel UHSK-ZI or via the openings of the vacuum channels UHSK-ZI of the tine ZK or the tines ZK of the pivoting lever SH. The pivoting lever SH is designed and configured to be externally actuated, namely by means of an actuator in the form of a motor, such that a segment 3 can be withdrawn from the transfer rotary body 41, 42 against a holding force exerted on the segment 3 by a transfer rotary body 41, 42. A convex curved support surface TF of a pivot lever SH for a segment 3, 3a, 3b, which is formed by tines ZK and extends in the direction from a bearing end SHLE of the pivot lever towards a free end SHFE of the pivot lever SH, has a radius of curvature that corresponds to the radius of a transfer rotation body 41, 42, namely the radius of a transfer rotation body 41, 42. According to a further embodiment, the radius of curvature does not have to correspond to the radius of the transfer rotation bodies 41, 42; in this case, the radius of curvature of the pivot lever SH does not deviate from the radius of the transfer rotation body 41, 42 cooperating with the respective pivot lever SH by more than 40%, preferably not more than 20%, particularly preferably not more than 10%. The material web feed device 10 has a folding device 15. The folding device 15 is designed and configured to place a section of the material web 4 over and / or around the respective uppermost segment 3 of the stack 2 located on the stacking table 6 by means of a back and forth movement. The back and forth movement takes place in the form of a linear movement or as a pivoting movement. The folding device 15 has a movably mounted pair of rollers 69 through which the material web 4 is guided. The material web 4 is guided continuously between the rollers of the movable pair of rollers 69. The movable pair of rollers 69 is provided so as to be movable in an arc over the stacking table 6. ichenl iste 1 device 2 stacks 3 segments 4 Material web 5 folds 6 stacking table 7 Hold-down device 8 endless segment track 9 Compensation device 10 Material web feeding device 11 first segment feed device 12 second segment feeding device 13 Separator 14 Shell surface 15 Folding device Section 16 17 Connection structure 18 Compensation device 19 Compensation device 20 folding space 21 rotation bodies 22 rotation bodies 23 Changing position 24 Material web trailer 25 Separator 26 free end 27 Changing device 28 Fixing device 29 Material supply 30 Splicing device 31 Transfer facility 32 Transfer device 33 Coil 34 Coil 35 Coil 36 units 37 Unit 38 units 39 Coil holder 40 coil holder 41 transfer rotation bodies 42 transfer rotation bodies 43 Web edge control device 44 Test facility 45 Detection device 46 Cleaning device 47 Discharge device 48 stacking system 49 material storage 50 discharge device 51 turntables 52 traction roller 53 Stacking system 54 housings 55 first area 56 second area 57 rotation bodies 58 Level 59 Level 60 timed movements 61 Deflection roller 62 dancer roller 63 roller 64 pulling roller 65 Ejection drum 66 Waste reservoir 67 recesses 68 pairs of rollers 69 pairs of rollers 70 lifting device 71 Conveyor belt 72 dancer roller 73 first pair of hold-down fingers 74 second pair of hold-down fingers 75 conveyor carriages 76 clamping device 77 conveyor carriages 78 suction beams 79 Blade 80 clamping jaws 81 clamping jaws 82 pairs of rollers 83 arrester flags 84 conveyor carriages 85 Withdrawal device 99 procedures 100 process steps 101 process step 102 Process step 103 Process step 104 Process step 105 Process step 106 Process step 107 Arrow 108 Arrow a) Stacking step b) Stacking step c) Stacking step d) Stacking step F1 first conveyor section F2 second conveyor section F3 third funding phase

Claims

Claims:

1. Device (1) for the energy cell producing industry for forming a stack (2) comprising a plurality of segments (3) and a material web (4), wherein - the device (1) is designed to fold the material web (4) in a zigzag shape and to deposit the segments (3) on the material web (4) in such a way that in the stack (2) the segments (3) are arranged in the folds (5) of the material web (4), wherein the device (1) comprises the following components: - a stacking table (6) on which the stack (2) is formed, - a material web feeding device (10) which is designed to convey the material web (4) to the stacking table (6), and - a first and / or a second segment feed device (11, 12), each of which is designed to convey segments (3) to the stacking table (6), characterized in that - the first and / or the second segment feed device (11, 12) each comprise at least one rotational body (21, 22) which is mounted rotatably about a rotational axis and is designed to convey segments (3) by a rotational movement.

2. Device (1) according to claim 1, characterized in that - the one rotation body (21, 22) or at least one of the plurality of rotation bodies (21, 22) of the first and / or the second segment feed device (11, 12) segments (3) in a transported or transported in a timed movement.

3. Device (1) according to claim 1 or 2, characterized in that - the first and / or the second segment feed device (11, 12) each comprise a transfer device (31, 32) which is designed to deposit segments (3) on the stacking table (6), in particular by a back and forth movement.

4. Device (1) according to claim 3, characterized in that - a respective rotational body (21, 22) of the first and / or the second segment feed device (11, 12) forms a transfer rotational body (41, 42) from which the transfer device (31, 32) of the first and / or the second segment feed device (11, 12) takes over a segment (3).

5. Device (1) according to claim 4, characterized in that - the transfer rotary body (41, 42) of the first and / or the second segment feed device (11, 12) in each case has recesses (67) which enable engagement of an outer contour of the associated transfer device (31, 32), so that the transfer device (31, 32) engages in the recesses of the transfer rotary body (41, 42) when receiving a segment (3).

6. Device (1) according to claim 4 or 5, wherein - the device (1) comprises a first and a second segment feed device (11, 12), characterized in that - the transfer rotary bodies (41, 42) of the first and second segment feed devices (11, 12) are arranged such that the material web (4) is guided therebetween by means of the material web feed device (10).

7. Device (1) according to one of claims 3 to 6, characterized in that - the stacking table (6) comprises a holding-down device (7), which preferably comprises one or more holding-down fingers, wherein - the hold-down device (7) is designed to temporarily fix a segment (3) deposited on the stacking table (6) by the transfer device (31, 32) of the first and / or the second segment feed device (11, 12).

8. Device (1) according to one of the preceding claims, wherein - the device (1) comprises a first and a second segment feed device (11, 12), characterized in that - the device (1) is designed to alternately deliver a segment (3) of the first segment feed device (11) and the second segment feed device (12) to the stacking table (6) to form the stack (2).

9. Device (1) according to one of claims 3 to 8, characterized in that - the transfer device (31, 32) of the first and / or the second segment feed device (11, 12) is designed to convey a segment (3) on a curved path, for example on a circular path section, and / or To promote a change in its spatial orientation.

10. Device (1) according to one of the preceding claims, characterized in that - the first and / or the second segment feed device (11, 12) each comprise a first conveyor section (F1), wherein - the device (1) is designed to convey an endless segment track (8), from which the segments (3) are formed, in the first conveying section (F1) at a constant or approximately constant conveying speed.

11. Device (1) according to claim 10, characterized in that - the first and / or the second segment feed device (11, 12) each comprise a second conveyor section (F2), wherein - the device (1) is designed to convey the endless segment web (8) with a clocked movement in the second conveying section (F2).

12. Device (1) according to claim 11, characterized in that - a compensating device (9, 19), for example comprising a dancer roller (62), is arranged between the first conveyor section (F1) and the second conveyor section (F2), wherein - the compensation device (9, 19) is designed to enable a transition between a constant conveying speed and a clocked movement.

13. Device (1) according to claim 11 or 12, characterized in that - a separating device (13) is provided in the second conveyor section (F2), which is designed to divide the endless segment web (8) into segments.

14. Device (1) according to one of claims 11 to 13, characterized in that - in a third conveying section (F3) of the first and / or second segment feeding device (11, 12), segments (3) are conveyed with a clocked movement.

15. Device (1) according to one of the preceding claims, characterized in that - the at least one rotating body (21, 22) of the first and / or the second segment feed device (11, 12) is a drum which is designed to hold and convey a segment (3) on its outer surface (14), in particular by means of negative pressure.

16. Device (1) according to one of the preceding claims, characterized in that - the material web feed device (10) comprises a folding device (15) which is designed to place a section (16) of the material web (10) over and / or around the respective uppermost segment (3) of the stack (2) located on the stacking table (6) by means of a back and forth movement.

17. Device (1) according to claim 16, characterized in that - the folding device (15) comprises a movably mounted pair of rollers (69) through which the material web (4) is guided.

18. Device (1) according to one of claims 16 or 17, characterized in that - the device (1) is designed to continuously feed the material web (4) by means of the material web feed device (10) to a compensating device (18), for example comprising a dancer roller, from which the folding device (15) is supplied with the material web (4).

19. Device (1) according to one of claims 16 to 18, wherein - the device (1) comprises a first and a second segment feed device (11, 12), characterized in that - a folding space (20) is defined by the curved lateral surfaces (14) of the transfer rotary bodies (41, 42) of the first and second segment feed devices (11, 12) and by the stacking table (6), wherein - the folding device (15) deflects the material web (4) by utilizing this folding space (20) to carry out a folding movement.

20. Device (1) according to one of the preceding claims, characterized in that - the first and / or the second segment feed device (11, 12) each comprise at least three rotation bodies (21, 22), wherein - at least three of the rotation bodies (21, 22) of the first and / or second segment feed device (11, 12) are arranged in a linear configuration, wherein - the linear configuration is characterized by the fact that the The rotation axes of all rotation bodies of the linear configuration extend in a common plane (58, 59), whereby - preferably all rotation bodies (21, 22) of the linear configuration have the same diameter.

21. Device (1) according to one of the preceding claims, characterized in that - the stacking table (6) is mounted during the stacking process in such a way that movements of the stacking table (6) with a horizontal directional component are prevented or the stacking table (6) can be moved by a maximum of 2 mm in the horizontal direction to compensate for position errors when depositing segments (3).

22. Device (1) according to one of the preceding claims, characterized in that - the stacking table (6) is movable in the vertical direction such that the reloading of segments (3) and / or material web (4) takes place at a constant height during stack formation.

23. Device (1) according to one of the preceding claims, characterized in that - the device (1) is designed to move the stack (2) after its completion from the stacking table (6) into a winding position (23) and / or into an intermediate position provided between the stacking table (6) and the winding position (23), wherein - by moving the stack (2) from the stacking table (6) into the winding position (23) or into the intermediate position (23), a material web drag (24) which is arranged over the stack (2) is pulled out of the material web feed device (10), whereby - a separating device (25) is provided which is designed to separate this material web trail (24) from the endless material web (4) of the material web feed device (10), so that the material web trail (24) has a free end (26), wherein - a winding device (27) is provided which is designed to wrap the finished stack (2) with the projecting material web trail (24) in the winding position (23).

24. Device (1) according to claim 23, characterized in that - the device (1) comprises a fixing device (28) which is designed to fix the material web trail (24) wound around the stack (2) by the winding device (27).

25. Device (1) according to claim 23 or 24, characterized in that - the device (1) is designed to form a subsequent stack (2) on the stacking table (6) during the wrapping of the stack (2) by means of the winding device (27) and / or during the separation of the material web trail (24) from the remaining material web (4).

26. Device (1) according to one of the preceding claims, characterized in that - the device (1) comprises a material supply (29) which is designed to supply the first and / or the second segment feed device (11, 12) as well as the material web feed device device (10) each with an endless web of the corresponding material, which is provided in the wound state as a coil (33, 34, 35).

27. Device (1) according to claim 26, wherein - the device (1) comprises a first and a second segment feed device (11, 12), wherein - the material supply (29) comprises separate units (36, 37, 38) so that the first and second segment feed device (11, 12) and the material web feed device (10) can each be supplied with continuous webs of different types.

28. Device (1) according to claim 26 or 27, characterized in that each of the units comprises a coil holder (39) for an expiring coil (33a, 34a, 35a) and a coil holder (40) for a new coil (33b, 34b, 35b), wherein - a splicing device (30) is provided with which a free end of an outgoing coil (33a, 34a, 35a) can be connected to a free end of a new coil (33b, 34b, 35b).

29. Device (1) according to claim 28, characterized in that - when completing the conveying movement, a web edge control device (43) is provided downstream of the splicing device (30), which is designed to correct the alignment and / or position of an edge of the corresponding endless web if necessary.

30. Device (1) according to one of the preceding claims, characterized in that - the first and / or the second segment feed device (11, 12) comprise one or more of the following functional units: - a testing device (44) arranged to test a segment (3); - a detection device (45) which is arranged to detect the presence of a segment (3), to detect a position and / or to detect an orientation of a segment (3) on a rotation body (21, 22); - a cleaning device (46) which is designed to clean a segment (3); and / or - an ejection device (47) which is designed to eject a segment (3) from the production process.

31. Device (1) according to claim 30, characterized in that - a functional unit (44, 45, 46, 47) comprises two components, wherein the two components are assigned to different rotation bodies (21, 22) of a segment feed device (11, 12), wherein - the two components of a functional unit (44, 45, 46, 47) are assigned to mutually adjacent rotational bodies (21, 22), or wherein - the two components of a functional unit (44, 45, 46, 47) are assigned to two rotational bodies (21, 22), between which an even number of further rotational bodies (21, 22) are arranged.

32. Device (1) according to claim 30 or 31 with reference to Claim 14, characterized in that - the functional units (44, 45, 46, 47) of the third conveyor section (F3).

33. A method (99) for the energy cell producing industry for forming a stack (2) comprising a plurality of segments (3) and a material web (4), wherein - the material web (4) is folded in a zigzag shape (101), and the segments (3) are placed on the material web (4) in such a way that in the stack (2) the segments (3) are arranged in the folds of the material web (4), wherein - a first and / or a second segment feed device (11, 12) is used to convey segments (3) to a stacking position, characterized in that - the first and / or the second segment feed device (11, 12) each comprise at least one rotational body (21, 22) which is mounted rotatably about a rotational axis and is designed to convey segments (3) by a rotational movement.

34. Method (99) according to claim 33, characterized in that - an endless segment web (8) is fed to the first and / or the second segment feed device (11, 12), wherein - the endless segment web (8) is conveyed in a first conveying section (F1) at a constant conveying speed, wherein - the endless segment web (8) is conveyed in a second conveyor section (F2) in a synchronized manner and is divided into segments (3), and wherein - the segments (3) are clocked in a third conveyor section (F3) be transported.

35. Method (99) according to claim 33 or 34, characterized in that - in a stacking step a) a section of the material web (4) is placed over the stacking table (6) or on a segment (3) lying on the stacking table (6), then - in a stacking step b) a segment of the first type (3a) is placed on the section of the material web (4) laid over the stacking table (6); subsequently - in a stacking step c) the material web (4) is placed on the stacking table (6) to form a fold (5) around the deposited segment (3); and subsequently - in a stacking step d) a segment of the second type (3b) is placed on the section of the material web (4) lying on the stacking table (6).

36. Method (99) according to claim 35, characterized in that - the stacking steps b) and d) are carried out alternately with the stacking step c) being inserted between them; and - this process is repeated several times.

37. Method (99) according to one of claims 35 or 36, characterized in that - the material web (4) is a separator, whereby - the segment of the first type (3a) is an anode sheet, wherein - the second type segment (3b) is a cathode sheet.

38. Method according to claim 36 or 37, characterized in that - a segment of the first type (3a) is deposited as the first segment (3) of the stack (2) by means of method step b), and - as the last segment (3) of the stack (2) by means of method step b) a segment of the first type (3a) is also deposited.

39. Method (99) according to one of claims 33 to 38, characterized in that - after the formation of the stack (2), a section of the material web (4) projects beyond the formed stack (2), so that a material web trail (24) with a free end (26) is formed, wherein - the formed stack (2) is wrapped by means of the material web drag (24).

40. Method (99) according to claim 39, characterized in that - the formation of a stack (2) by folding (101) the material web (4) takes place simultaneously with the wrapping (104) or with the separation (103) of the material web trail (24) of another stack (2) at different positions.

41. Method (99) according to one of claims 33 to 40, characterized in that - the method (99) is carried out using the device (1) according to one of claims 1 to 32.

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