LAMINATION STATION AND METHOD FOR BATTERY CELL MANUFACTURING INDUSTRY - Patent application

Abstract

A lamination station 50 for the battery cell manufacturing industry, comprising a conveying device 20 for conveying a planar element 95 and a lamination device 30 arranged downstream of said conveying device 20 for forming a segment stack from the conveyed planar element 95. The lamination station 50 comprises an optical measuring device 10 arranged towards said conveying device 20 for measurement and configured to detect a positional deviation ΔR, ΔS and / or an angular deviation φ of a planar element 95 conveyed on said conveying device 20.

Description

[Technical field]

[0001] The present invention relates to a lamination station for the battery cell manufacturing industry, comprising a conveying device for conveying planar elements and a lamination device arranged downstream of the conveying device for forming a segment stack from the conveyed planar elements. Furthermore, the present invention relates to a corresponding lamination method. [Background technology]

[0002] The main challenge during the stacking of cells, electrodes or separator parts, generally planar elements, in the manufacture of battery cells is the positioning accuracy of the individual parts or segments. In this case, all deviations from the preceding steps affect the stacking accuracy. Certain tolerances are best observed when the individual layers, i.e. segments, are centered. The separator is relatively soft. It cannot therefore be positioned against the abutment. Aligning the separator edges by means of matching surfaces is not possible and is not optimal for observing the tolerances. A method must be used in which the parts / segments can be centered as much as possible.

[0003] EP 2 696 421 A1 discloses a lamination station which operates discontinuously by a so-called pick-and-place method, whereby the parts / segments can be positioned centrally, but the production speed of such an installation can be limited due to the discontinuous operation. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] European Patent Application Publication No. 2696421 Summary of the Invention [Problem to be solved by the invention]

[0005] It is an object of the invention to provide a lamination station and a lamination method in which predefined requirements for the lamination precision can be met without a decrease in the production speed. [Means for solving the problem]

[0006] This object of the invention is achieved by the features of the independent claims.

[0007] According to the invention, the lamination station comprises an optical measuring device arranged for measurement towards the transport device and configured to detect the positional deviations ΔR, ΔS and / or the angular deviations φ of the planar element transported on the transport device, such that the measurement signals output by the measuring device can be used as a basis for carrying out suitable measures once the deviations of the position and orientation of the planar element from a target position or target orientation have been calculated.

[0008] Preferably, the conveying device is journalled immediately before the stacking device. That is, preferably, no further conveying device is provided between the conveying device and the stacking device. In this way, the planar elements to be stacked can be aligned as late as possible, i.e. only at the time of stacking or immediately before stacking, and any deviations occurring before can be corrected. The position of the planar elements can be corrected relatively simply and with little effort in the last possible process step. This corrects errors from the preceding process steps. Preferably, a measuring method that does not have excessive precision can be used or the configuration of the measuring device can be selected relatively simply. This reduces the costs of the machine.

[0009] In a preferred embodiment, the conveying device may be a rotating conveying device, for example a conveying drum, in particular an accelerator drum. To avoid uncontrolled movements, the parts are preferably always held and prevented from moving freely, thus avoiding displacements during stacking.

[0010] Preferably, the conveying device and / or the stacking device are configured to correct the position and / or the angle of the planar element based on the measurement signal output from the measuring device, so that it can be achieved that the segments are positioned on the segment stack centered or generally without deviation from the target position / target orientation.

[0011] In a preferred embodiment, the position of the planar element along the conveying direction is corrected by controlled adjustment of the handover position of the planar element from the conveying device. This can be very simply implemented by position-controlled operation of the conveying device, for example a synchronous motor. Preferably, no additional means are required for correcting the segment position in the conveying direction, if the conveying device is in any case operated in a position-controlled manner.

[0012] In one embodiment of the invention, at least one receiving part of the transport device for receiving the planar element is controllably adjustable and / or rotatable relative to a base body of the transport device in order to correct the position and / or angle of the planar element, which has the advantage that only a relatively small mass has to be moved.

[0013] In another embodiment, the entire rotating part of the transport device, e.g. the transport drum, is adjustable and / or rotatable in order to correct the position and / or angle.

[0014] In another embodiment, at least one element receiving portion of the stacked device is adjustable and / or rotatable to correct the position and / or angle.

[0015] The invention is not limited to the above-mentioned positional and / or angular correction of the incorrectly positioned / incorrectly oriented planar elements, for example it is also conceivable to remove the incorrectly positioned planar elements from the production flow and / or to output a warning signal to a display device, for example a control terminal.

[0016] Preferably, the optical measuring device has an imaging measuring device, in particular a camera. By means of the optical measuring device facing the transport device and a corresponding image evaluation in the control and evaluation device, all the required deviations and angular errors can be measured simply. In this embodiment, the imaging measuring device is preferably configured to image during the stationary phase of the transport device. This allows for a higher measurement accuracy. However, measurements while the transport device is moving are also possible.

[0017] In another embodiment, or in addition to the imaging measuring device, the optical measuring device preferably has at least one optical contrast sensor. By using a simple and relatively inexpensive optical contrast sensor, optical transitions, i.e. light-dark transitions or color transitions, generated by the lateral edges of the planar element due to the transport can be reliably detected as sharp signal edges, i.e. the position of the planar element along the transport direction can be reliably calculated.

[0018] Preferably, the optical measuring device has a number of optical contrast sensors arranged transversely to the transport direction of the transport device, which allows the deviation of the signal edges of these sensors in the transport direction to be calculated in a simple manner by using trigonometric functions, which allows the angular deviation of the planar element to be calculated.

[0019] Preferably, the optical measuring device comprises at least one laterally arranged optical sensor configured to detect a lateral positional deviation of the planar element transported on the transport device from a target position, which is particularly advantageous when the lateral deviation of the planar element cannot be measured by the optical contrast sensor.

[0020] According to another aspect, the invention relates to a stacking method for the battery cell manufacturing industry, comprising transporting planar elements by a transport device and forming a segment stack from the transported planar elements by a stacking device arranged downstream of the transport device. According to the invention, optical measurements are performed by an optical measuring device arranged towards the transport device for measurement, by means of which positional and / or angular deviations of the planar elements transported on the transport device are detected.

[0021] According to the above, an optical sensor, for example a camera and / or at least one optical contrast sensor, detects the position of the planar element on the transport device. In the case of an optical contrast sensor, this is essentially performed during the movement of the transport device. In the case of a camera, this is performed during the movement or while the transport device is stationary. The control and evaluation device then calculates the deviation between the actual position measured by the measuring device and the target position. From this deviation, a relative positioning correction between the receiver of the transport device and the stacking device can be derived and performed. Preferably, the final positioning accuracy of the stack can be measured by an additional optical sensor.

[0022] The specific position of the planar element is detected while it is moved by the transport device in the direction of the element receiver of the stacking device. In this case, the optical sensor always senses the position of the planar element at the same position. Various sensor types are conceivable. Imaging measuring devices are suitable for detecting the exact position and are also suitable for recognizing angular errors. By means of several optical contrast sensors, in particular by arranging several sensors laterally, several different measurement variables can be detected.

[0023] Hereinafter, the present invention will be described based on a preferred embodiment with reference to the accompanying drawings. [Brief description of the drawings]

[0024] [Figure 1] FIG. 2 is a schematic side view of a planar element as an electrode-separator laminate. [Diagram 2]FIG. 2 is a schematic front view of a rotary conveying device having a measuring device. [Diagram 3] FIG. 2 is a perspective view of a lamination station having a rotary conveying device and a measuring device; [Figure 4] FIG. 2 is a schematic front view of a planar element in the region of a measuring device. [Diagram 5] FIG. 2 is a schematic front view of a planar element with an angular offset in the area of ​​a measuring device. [Figure 6] 1 is a perspective view of a lamination station according to a different embodiment; FIG. [Figure 7] 1 is a perspective view of a lamination station according to a different embodiment; FIG. [Figure 8] FIG. 13 is a perspective view of a lamination station according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0025] To manufacture a battery cell, a plurality of planar elements 95, such as a plurality of electrode separator laminates 90, are formed and subsequently laminated into a cell stack. The electrode separator laminate 90 consists of a plurality of planar elements 91-94, i.e. a plurality of layers of alternating separator sheets 91, anodes 92 and separator sheets 93 and cathodes 94. The order of the individual layers 91-94 can be changed, in particular it is possible to exchange the anodes 92 and cathodes 94. The electrode separator laminate 90 can be a single cell having four single layers, as shown in FIG. 1. The electrode separator laminate 90 can also be a plurality or more than four single layers 91-94, for example a multiple of four. In another embodiment, the planar elements 95 to be laminated in the lamination station 50 can be a single sheet, i.e. a single separator sheet 91, 93 or a single electrode sheet 92, 94. To seal the stack, the electrode separator laminate can be covered with multiple alternating monolayers, for example three monolayers.

[0026] The electrodes 92, 94 each have one contact tongue 96 (see FIG. 4) which allows all the electrodes 92, 94 of one type to be in contact with each other in the final cell stack. The contact tongues 96 of the anode 92 and the cathode 94 can be located on the same side of the stack 90 or on opposite sides.

[0027] The stacking station 50 for stacking a plurality of planar elements 95 into a cell stack comprises a conveying device 20, a measuring device 10 for measuring the properties of the planar elements 95 conveyed on the conveying device 20 and a stacking device 30 arranged downstream of the conveying device 20 (see Figs. 2 and 3). Preferably, the conveying device 20 is arranged immediately before the stacking device 30, i.e. between the conveying device 20 and the stacking device 30, preferably no further conveying device is provided. Preferably, the conveying device 20 is the last conveying device 20 or a conveying drum in the production flow, to which the plurality of planar elements 95 are conveyed separately. In the embodiment described here, the conveying device 20 is preferably a rotating conveying device 21, in other words a conveying drum, which is rotationally driven in the direction of rotation R. However, the conveying device 20 may also be configured as a belt conveyor.

[0028] A planar element 95 is delivered (production flow 80) at a predefined circumferential position, here at the 12 o'clock position, by a previously arranged conveying device 82, for example a conveying drum (see FIG. 3), to the rotary conveying device 21, where it is conveyed in the rotational direction R and further delivered at a predefined circumferential position, here at the 6 o'clock position, in particular to a subsequently arranged stacking device 30. The conveying device 20 holds the planar element 95 during conveying, for example by vacuum, and may have a receiving portion 22 for receiving the planar element 95. In this case, the number of receiving portions 22 is three, but may also be more or less than three.

[0029] The measuring device 10 is arranged towards the conveying device 20 for the measurement and is configured for optically measuring a planar element 95 conveyed on the conveying device 20. The measuring device 10 comprises at least one optical sensor 11-13 arranged in an imaging direction towards the coated side of the rotating conveying device 21, i.e. towards the target side of the stack 90. ​​Preferably, the measuring device 10 comprises one camera 11 and / or at least one optical contrast sensor 12, 13, which are directed towards the coated side of the rotating conveying device 21. The at least one optical sensor 11-13 is configured to detect at least one deviation of the planar element 95 on the conveying device 21. A deviation can be understood as a deviation of a measured position or direction from a target position or a target direction. The corresponding signal and data processing and evaluation of the measurement signals from the measuring device are carried out in an electronic control and evaluation device 40, which is shown diagrammatically in FIG. 2. In particular, the electronic control and evaluation device 40 can be implemented in the machine control device or in a separate data processing device.

[0030] Preferably, the measuring device 10 is configured to measure a deviation ΔR of the planar element 95 along the conveying direction R, here along the rotation direction R of the rotary conveying device 21. Preferably, the measuring device 10 is configured to measure a deviation ΔS of the planar element 95 transverse to the conveying direction F of the conveying device 21, here the rotation direction R of the rotary conveying device 21. Preferably, the measuring device 10 is configured to measure a rotation of the planar element 95 at an angle φ to an axis perpendicular to the conveying plane, here the radial axis of the rotary conveying device 21.

[0031] By means of the camera 11 the deviations ΔR, ΔS and / or the angular deviation φ can be determined simply by image processing in the electronic control and evaluation device 40 .

[0032] In the embodiment according to FIG. 3, the rotary conveying device 21 is configured as a so-called accelerator drum. This means that the rotary conveying device 21 does not rotate with a constant rotational speed, but is periodically braked and accelerated again. In order to transfer the planar element 95 to the stacking station 50 positionally accurate, in particular the rotary conveying device 21 can be stopped at the transfer position of the planar element 95, here at the 6 o'clock position. In such an embodiment, the control and evaluation device 40 preferably synchronizes the camera 11 or the imaging optical sensor of the measuring device 10, such that the imaging is performed at the time of the stopping of the rotary conveying device 21. Preferably, the angular distance between the camera 11 and the transfer position (here at 6 o'clock) corresponds to the angular distance between the two receivers 22, so that at the time of the stopping of the rotary conveying device 21 the planar element 95 is located in the imaging field of the camera 11. Imaging during the rotation of the rotary conveying device 21 is possible.

[0033] First, the deviation ΔR can be measured by the at least one optical contrast sensor 12, 13 as follows: The at least one optical contrast sensor 12, 13 is configured to measure an optical transition generated by a side edge 51, 52 of the planar element 95 passing by it. In this case, the side edge 51, 52 is an edge of the planar element 95 extending transversely to the conveying direction or the direction of rotation, in particular the leading edge 51 and / or the trailing edge 52. The optical transition is a light-dark transition or a color transition. When the optical contrast sensor 12, 13 determines an optical transition by the passing side edge 51, 52 of the planar element 95, it generates a steep signal edge which represents the exact position of the side edge 51, 52, i.e. the planar element 95, along the conveying direction or the direction of rotation. In this way, the deviation ΔR (indicated by the arrow) of the planar element 95 of the rotary conveying device 21 in the circumferential direction can be determined and advantageously corrected, preferably by adjusting the rotary conveying device 21 (this will be explained in more detail below). The optical contrast sensors 12, 13 can, for example, be fast-switching contrast light switches. If several optical contrast sensors 12, 13 are arranged transversely to the conveying or rotation direction, for example, the average value of the position of the optical transitions can be measured as the actual value of the side edges 51, 52.

[0034] Preferably, several contrast sensors 12, 13 with a lateral distance D from one another are provided at the same position in the conveying direction (see FIGS. 4 and 5). By means of several spaced optical contrast sensors 12, 13 at the same position in the conveying direction, the angular orientation of the planar element 95 relative to an axis perpendicular to the conveying plane, for example the radial axis of the rotary conveying device 21, i.e. the amount of undesired rotation, can be determined in the control and evaluation device 40. This is explained below with the aid of FIG. 5.

[0035] In this example, first the optical sensor 13 detects the leading edge 51 of the planar element 95, and afterwards the optical sensor 12 detects the leading edge 51 of the planar element 95 with a delay time Δt. From a known conveying speed v or machine cycle, the deviation a in the conveying direction is thus obtained as a=v·Δt. The angular deviation φ is obtained by trigonometric evaluation of the ratio of a to D: tan(φ)=a / D. By forming the arctangent, the angular deviation φ is obtained as follows: φ=arctan(a / D).

[0036] The optical sensors 12, 13 are therefore useful contrast light switches which detect the passage of the planar element 95. Depending on the trigger pattern, it can be determined whether the planar element 95 is transported exactly parallel (both optical sensors 12, 13 trigger simultaneously) or whether it has an angular error φ. By absolute time points with reference to the absolute position of the actuation of the transport device, the position and the deviation ΔR along the transport device can be determined. By corresponding offsets at the handover to the stacking device 30, the recognized errors can be corrected and the placement position can be adapted.

[0037] The lateral deviation ΔS cannot be measured by the optical contrast sensors 12, 13. To measure the lateral deviation ΔS, the measuring device 10 can have further optical sensors 14, 15 arranged laterally to the planar element 95 (see FIG. 4). The optical sensors 14, 15 can be, for example, multiple reflection sensors with light scanning lines. The reflection sensors can determine by light quantity measurement how far the planar element 95 is laterally deviated with respect to the conveying direction F. The optical sensors 14, 15 can also be distance sensors that are configured to measure the lateral distance of the planar element 95, i.e. the lateral deviation. Alternatively, spot- or line-measuring laser scanners operating by triangulation or time-of-flight measurements (lidar) can be used. In some embodiments, it is sufficient to provide such distance sensors 14 or 15 on only one side of the conveying device 20.

[0038] Thus, the lateral deviation can be detected by the optical sensors 14, 15. In this case, the reflection principle can be used with a light scanning line, which allows the extent to which the planar element is laterally deviated relative to the central longitudinal axis to be determined actinometrically. Thus, similar to the correction of the longitudinal deviation described above, the lateral deviation can be corrected by a suitable actuator. By adding a moving component that rotates or at least tilts, the angular error can also be corrected in the same way.

[0039] Optionally, at least one further optical sensor 16 is provided for measuring the position of the contact tongue 96 of the electrodes 92, 94 in the transport direction. Preferably, the distance from the optical sensor 16 to the sensors 12, 13 in the transport direction is smaller than the dimension of the planar element 95 in the transport direction and can approximately correspond to the distance from the lateral edge 51 to the front edge of the contact tongue 96. The time difference indicates the deviation of the contact tongue 96 relative to the edge 70 of the planar element 95 in the transport direction.

[0040] The further optical sensor 16 allows the measurement of the position of each contact tongue 96 relative to the lateral edge 51, 52 of the corresponding planar element 95. This information is useful, since the position of the contact tongue 96 can vary relative to the substrate of the corresponding electrode 92, 94. For example, the measurement signal of the sensor 12, 13 can be corrected by this information, so that the sensor 12, 13 does not erroneously indicate a misalignment of the electrode 92, 94 that is actually based on a misalignment of the contact tongue 96 relative to the substrate of the corresponding electrode 92, 94. As with the conductor projections or contact tongues 96, for example, the further optical sensor 16 is a general concept for optional additional features of the planar element that can possibly be detected in the same way.

[0041] If the control and evaluation device 40 detects a deviation ΔR, a deviation ΔS and / or an angular error φ of the planar element 95, the control and evaluation device 40 can automatically activate appropriate measures, as will be explained in more detail below.

[0042] If the control evaluation device 40 detects a deviation ΔR of the planar element 95 along the conveying direction F or along the rotation direction R, said deviation ΔR can be advantageously corrected by controlling the actuation of the positioning for the rotary conveying device 21 by changing and appropriately selecting the transfer position for the planar element 95. If 12 o'clock is 0°, 6 o'clock is 180°, and 9 o'clock is 90°, the transfer position does not always have to be exactly 180°, but can be slightly changed from 180° by a few tenths of a second. For example, if the planar element 95 leads in the conveying direction, the transfer position in FIG. 2 will be slightly less than 180°. For example, if the planar element 95 trails in the conveying direction, the transfer position in FIG. 2 will be slightly more than 180°. In this way, a positionally accurate arrangement to the stack in the stacking station 50 can be guaranteed without deviations ΔR along the conveying direction.

[0043] Therefore, in the above embodiment, the stopping position of the rotary conveying device 21 for transferring the planar element 95 to the stacking device 30 is selected so that the deviation ΔR of the transport or conveying direction F is corrected.

[0044] In the embodiment according to Fig. 6, the rotating body 25 of the rotary conveying device 21, generally the entire rotating part 26 of the conveying device 20, is movable along a transverse axis 23, for example along the rotation axis of the rotary conveying device, in order to correct the deviation ΔS of the planar element 95 in the transverse direction and / or to correct the angular deviation φ of the planar element 95 rotatably about a pivot axis 24 perpendicular to the conveying plane (this is indicated by a double arrow). With this in mind, the conveying device 20 or the rotary conveying device 21 has a movement mechanism and / or a pivoting mechanism, not shown, which is appropriately controlled by the control and evaluation device 40 to cause the movement and / or pivoting.

[0045] Thus, in this embodiment, the rotor 25, here the entire accelerator drum, can be moved axially. Furthermore, the rotor 25 can be rotated about a radial axis to correct angular errors.

[0046] In the embodiment according to Fig. 7, only the receiving part 22 of the conveying device 20 is movable, for example along a transverse axis and / or along the conveying direction relative to the drum-shaped base body 27 of the conveying device 20, in order to correct the deviations ΔS and / or ΔR of the planar element 95 along the transverse direction and / or along the conveying direction and / or to correct the angular deviation φ of the planar element 95 about a pivot axis 24 perpendicular to the conveying plane, for example rotatably about a radial axis of the rotary conveying device 21. With this in mind, the conveying device 20 or the rotary conveying device 21 has a movement mechanism and / or a pivoting mechanism, not shown, which is appropriately controlled by the control and evaluation device 40 in order to cause the movement and / or pivoting of the respective receiving part 22.

[0047] Therefore, in this embodiment, in order to correct the angle error, the receiving part 22 of the conveying device 20 is movably supported and can be moved in the conveying direction and / or laterally and / or rotated.

[0048] The stacking device 30 has an element receiving section 31, on which the planar elements 95 delivered from the conveying device 20 are successively arranged, i.e. stacked, to form a segment stack. In the embodiment according to FIG. 8, the element receiving section 31 of the stacking device 30 is movable along a transverse axis and / or along the conveying direction in order to correct a deviation ΔS and / or ΔR of the planar elements 95 at the element receiving section 31 of the stacking device 30 along the transverse direction and / or along the conveying direction and / or to correct an angular deviation φ of the planar elements 95 at the element receiving section 31 of the stacking device 30 in a direction perpendicular to the conveying plane, for example pivotable about the axis of the rotating conveying device 21 in the vertical direction. With this in mind, the stacking device 30 has a movement mechanism and / or a pivoting mechanism, not shown, which are appropriately controlled by the control and evaluation device 40 in order to cause the movement and / or pivoting of the element receiving section 31. The element receiving section 31 can also be used to receive individual planar elements 95. The lamination process can then be carried out in a downstream lamination device.

[0049] Thus, in this embodiment, the element receiver 31, which may also be called the stack carrier, is movable in a plane and / or rotatable. To prevent the individual planar elements of the stack from being displaced relative to one another, the planar elements are preferably held or clamped by a holding mechanism.

[0050] The above methods for correcting position and / or angle may be used individually or in any combination, and in some cases even in combination, depending on what position and / or angle errors are present.

[0051] In another embodiment, incorrectly positioned planar elements 95 can be automatically removed from the production flow. A warning display on the control terminal is additionally or alternatively possible. [Explanation of symbols]

[0052] 10. Measuring Equipment 11 Imaging and measuring device 12, 13 Optical contrast sensor 14-16 Optical Sensor 20. Conveyor 21 Rotating conveyor 22 Receiving section 23 Horizontal axis 24 Swivel axis 25 Rotating Body 26 Means of transportation 27 Base 30 Stacking device 31 Element receiving section 40 Control evaluation device 50 Lamination Station 51,52 Lateral edge 80,81 Manufacturing flow 90 Electrode separator laminate 91 Separator sheet 92 Anode 93 Separator Sheet 94 Cathode 95 Planar elements 96 Contact tongue piece

Claims

1. A lamination station (50) for the battery cell manufacturing industry, comprising a conveying device (20) for conveying planar elements (95) and a lamination device (30) arranged downstream of the conveying device (20) for forming a segment stack from the conveyed planar elements (95), 1. A lamination station comprising an optical measuring device (10) arranged towards the conveying device (20) for measurement and configured to detect positional deviations ΔR, ΔS and / or angular deviations φ of planar elements (95) conveyed on the conveying device (20).

2. 2. The lamination station according to claim 1, wherein the conveying device (20) and / or the lamination device (30) are configured to correct the position and / or angle of the planar element (95) based on the measurement signal output from the measuring device (10).

3. 3. The lamination station according to claim 2, wherein the deviation ΔR of the position of the planar element (95) along the conveying direction F, R is corrected by controlled adjustment of the delivery position of the planar element (95) from the conveying device (20).

4. 4. A lamination station according to claim 3, characterized in that the controlled adjustment of the delivery position of the planar element (95) from the conveying device (20) is performed by a positioned actuation of the conveying device (20).

5. 5. The lamination station according to claim 2, wherein a receiving portion (22) of the conveying device (20) for receiving the planar element (95) is adjustable and / or rotatable relative to a base (27) of the conveying device (20) in order to correct the position and / or angle of the planar element (95).

6. 5. The lamination station according to claim 2, wherein the entire rotating part (26) of the conveying device (20) is adjustable and / or rotatable in order to correct the position and / or angle.

7. 5. The lamination station according to claim 2, wherein at least one element receiving portion (31) of the lamination device (30) is adjustable and / or rotatable in order to correct the position and / or angle.

8. 5. The lamination station according to claim 1, wherein the optical measuring device (10) comprises an imaging measuring device (11), in particular a camera.

9. 9. The lamination station according to claim 8, wherein the imaging measuring device (11) is configured to image during a stop phase of the transport device (20).

10. 5. The laminating station according to claim 1, wherein the optical measuring device (10) comprises at least one optical contrast sensor (12, 13).

11. 5. The lamination station according to claim 1, wherein the optical measuring device (10) comprises a plurality of optical contrast sensors (12, 13) arranged transversely to the conveying direction of the conveying device (20).

12. 5. The lamination station according to claim 1, wherein the optical measuring device (10) comprises at least one laterally arranged optical sensor (14, 15) configured to detect a lateral position deviation ΔS of a planar element (95) transported on the transport device (20) from a target position.

13. 5. The stacking station according to claim 1, wherein the conveying device (20) is journaled immediately before the stacking device (30).

14. 5. A laminating station according to any one of claims 1 to 4, characterized in that the conveying device (20) is a rotary conveying device (21).

15. A stacking method for the battery cell manufacturing industry, comprising: conveying planar elements (95) by a conveying device (20); and forming a segment stack from the conveyed planar elements (95) by a stacking device (30) disposed downstream of the conveying device (20), 1. A lamination method comprising: performing optical measurements using an optical measuring device (10) that is positioned toward the conveying device (20) for the measurements; and detecting positional deviations ΔR, ΔS and / or angular deviations φ of a planar element (95) conveyed on the conveying device (20) using the optical measuring device.

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