Stacking station and stacking method for the battery cell-producing industry

Abstract

The invention relates to a stacking station (50) for the battery cell-producing industry, comprising a conveyor device (20) for conveying flat elements (95) and a stacking device (30) arranged downstream of the conveyor device (20) for forming a segment stack from conveyed flat elements (95). The stacking station (50) has an optical measuring device (10) which is arranged in a measurement relationship with the conveyor device (20) and is designed to detect a position deviation ΔR, ΔS and / or an angle offset φ of a flat element (95) being conveyed on the conveyor device (20).

Description

[0001] Stacking station and stacking process for the battery cell manufacturing industry

[0002] The present invention relates to a stacking station for the battery cell production industry, comprising a conveyor device for conveying flat elements and a stacking device arranged downstream of the conveyor device for forming a segment stack from the conveyed flat elements. The invention further relates to a corresponding stacking method.

[0003] A major challenge when stacking monocells, electrodes, or separator sections, and generally flat elements, in battery cell production is the positioning accuracy of the individual sections or segments. All deviations from previous processes are incorporated into the stacking accuracy. The given tolerance is best utilized when the individual layers, i.e., segments, are positioned center-to-center. The separators are relatively soft. Therefore, they cannot be positioned to a stop. Aligning the edges of the separators using an alignment surface is not possible and not optimal for utilizing the tolerance. A method must be used that allows the sections / segments to be positioned as center-to-center as possible.

[0004] EP 2 696 421 A1 discloses a stacking station that operates discontinuously using a so-called pick-and-place method. This allows the sections / segments to be positioned centrally, but the production speed of such systems is limited due to the discontinuous operation. The object of the invention is to provide a stacking station and a stacking method that can meet specified requirements for stacking accuracy without compromising production speed.

[0005] The invention solves this problem with the features of the independent claims.

[0006] According to the invention, the stacking station comprises an optical measuring device arranged in a measuring relationship with the conveying device and configured to detect a positional deviation and / or an angular offset of a planar element conveyed on the conveying device. A measurement signal output by the measuring device can serve as a basis for implementing a suitable measure if a deviation of the position or orientation of a planar element from a target position or target orientation is detected.

[0007] Preferably, the conveying device is arranged directly upstream of the stacking device, i.e. advantageously no further conveying devices are provided between the conveying device and the stacking device. In this way, the flat elements to be stacked can be aligned as late as possible, i.e. only during or immediately before stacking, and all previously occurring deviations can be corrected. The positions of the flat elements can be corrected in a relatively simple manner with little effort in the last possible process step. This corrects errors from the preceding process steps. Preferably, measuring methods can be used which do not require excessive precision, or the design of the measuring device can be selected to be relatively simple, which reduces the cost of the machine.

[0008] In an advantageous embodiment, the conveying device can be a rotary conveyor, for example a conveyor drum, in particular an accelerator drum. To prevent uncontrolled movements, the sections are advantageously held at all times, preventing free movement. This prevents shifting during stacking.

[0009] Preferably, the conveying device and / or the stacking device are configured to perform a position correction of a planar element based on a measurement signal output by the measuring device. This ensures that the segments are placed centrally on the segment stack, or generally without deviation from a desired position / orientation.

[0010] In an advantageous embodiment, a position correction of a flat element along the conveying direction is performed by controlled adjustment of the discharge position of the flat element from the conveying device. This can be achieved particularly easily using a position-controlled drive of the conveying device, such as a synchronous motor. If the conveying device advantageously already has a position-controlled drive, no additional means for correcting the segment position in the conveying direction are required.

[0011] In one embodiment of the invention, to perform a position correction of a flat element, at least one receptacle of the conveyor device for receiving a flat element is adjustable and / or rotatable relative to a base body of the conveyor device. This has the advantage that only a relatively small mass needs to be moved.

[0012] In another embodiment, in order to carry out a position and / or angle correction, a rotating part of the conveyor device, such as a conveyor drum, is adjustable and / or rotatable as a whole.

[0013] In a further embodiment, at least one element holder of the stacking device is adjustable and / or rotatable in order to carry out a position and / or angle correction.

[0014] The invention is not limited to the previously described position and / or angle correction of an incorrectly positioned / oriented planar element. It is also conceivable, for example, to remove an incorrectly positioned / oriented planar element from the product stream and / or to output a warning signal to a display device, such as an operator terminal.

[0015] The optical measuring device preferably has an imaging measuring device, in particular a camera. By means of an optical measuring device looking at the conveyor device and a corresponding image evaluation in a control / evaluation unit, all desired deviations and angular errors can be determined in a simple manner. In this embodiment, the imaging measuring device is advantageously set up to take images when the conveyor device is at a standstill, which allows for greater measurement accuracy. However, a measurement while the conveyor device is moving is also possible. In another embodiment, or in addition to the imaging measuring device, the optical measuring device preferably has at least one optical contrast sensor. By means of a simple and comparatively inexpensive optical contrast sensor, an optical transition generated by a transverse edge of a flat element as a result of conveying, i.e.a light-dark transition or a color transition as a sharp signal edge, and thus the position of the flat element along the conveying direction can be reliably determined.

[0016] The optical measuring device preferably comprises a plurality of optical contrast sensors arranged transversely to a conveying direction of the conveying device. This enables the angular offset of a flat element to be easily determined by trigonometrically evaluating the offset of the sensor signal edges in the conveying direction.

[0017] The optical measuring device advantageously comprises at least one laterally arranged optical sensor configured to detect a deviation of the position of a flat element conveyed on the conveyor from a target position in a transverse direction. This is particularly advantageous when a lateral offset of a flat element cannot be determined using the previously described optical contrast sensors.

[0018] According to a further aspect, the invention provides a stacking method for the battery cell production industry, comprising conveying planar elements by means of a conveying device and forming a segment stack from the conveyed planar elements by means of a stacking device arranged downstream of the conveying device. According to the invention, an optical measurement is performed by means of an optical measuring device arranged in a measuring relationship to the conveying device, and a positional deviation and / or an angular offset of a planar element conveyed on the conveying device is detected by means of the optical measurement.

[0019] According to the above, optical sensors, for example a camera and / or at least one optical contrast sensor, record the position of the flat elements on the conveyor device. In the case of optical contrast sensors, this occurs, by design, while the conveyor device is moving. In the case of a camera, this can occur while the conveyor device is moving or when it is at a standstill. A control / evaluation unit then determines the deviation of the actual position measured by the measuring device from a target position. From this deviation, a relative positioning correction between the images of the conveyor device and the stacking device can be derived and carried out. Additional optical sensors can advantageously be used to measure the final depositing accuracy of the stack.

[0020] The individual position of the flat element is detected while the flat element is moved by the conveyor device toward an element holder of the stacking device. The optical sensors always scan the position of the flat element at the same location. Different sensor types are conceivable. An imaging measuring device is suitable for detecting the exact position and also for detecting an angular error. Various measurement variables can be recorded using optical contrast sensors, in particular by arranging several sensors along a transverse direction. The invention is explained below using preferred embodiments with reference to the attached figures.

[0021] Fig. 1 is a schematic side view of a planar element in the form of a separator-electrode composite unit;

[0022] Fig. 2 is a schematic view of a rotary conveyor with a measuring device;

[0023] Fig. 3 is a perspective view of a stacking station with a rotary conveyor and a measuring device;

[0024] Fig. 4 is a schematic plan view of a planar element in the area of ​​the measuring device;

[0025] Fig. 5 is a schematic plan view of a planar element with an angular offset in the area of ​​the measuring device;

[0026] Fig. 6, 7 perspective views of a stacking station in different embodiments; and

[0027] Fig. 8 is a perspective view of a stacking device in another embodiment.

[0028] To manufacture battery cells, flat elements 95, for example electrode-separator composite units 90, are produced and subsequently stacked to form a cell stack. The separator-electrode composite units 90 consist of alternating layers of flat elements 91-94, namely separator sheet 91, anode 92, separator sheet 93, and cathode 94. The order of the individual layers 91-94 can vary; in particular, it is possible to interchange the anode 92 and cathode 94. The electrode-separator composite unit 90 can be a monocell with four individual layers 91-94, as shown in Figure 1. The electrode-separator composite unit 90 can have more or fewer than four individual layers 91-94, for example, even a multiple of four. In other embodiments, the planar elements 95 to be stacked in the stacking station 50 may also be individual sheets, ie individual separator sheets 91, 93 and individual electrode sheets 92, 94.At the end of the stack, an electrode-separator composite unit with a different number of individual layers, for example three, can be placed on top.

[0029] The electrodes 92, 94 each have a contact tab 96 (see Figure 4), with which all electrodes 92, 94 of one type in the final cell stack can be connected to one another. The contact tabs 96 of the anodes 92 and the contact tabs 96 of the cathodes 94 can be arranged on the same side or on opposite sides of the composite element 90.

[0030] A stacking station 50 for stacking the flat elements 95 to form a cell stack comprises a conveyor device 20, a measuring device 10 for measuring properties of flat elements 95 conveyed on the conveyor device 20 and a stacking device 30 arranged downstream of the conveyor device 20, see Figures 2 and 3. The conveyor device 20 is preferably arranged immediately upstream of the stacking device 30, i.e. advantageously no further conveyor device is provided between the conveyor device 20 and the stacking device 30. The conveyor device 20 is advantageously the last conveyor device or conveyor drum in the production stream on which the flat elements 95 are transported individually. In the embodiments described here, the conveyor device 20 is advantageously a rotary conveyor 21 driven to rotate in a direction of rotation R, in other words a conveyor drum.However, the conveying device 20 can also be designed as a belt conveyor.

[0031] Flat elements 95 are transferred at a defined circumferential position, here at 12 o'clock, from an upstream conveyor 82, for example a conveyor drum (see Figure 3), to the rotary conveyor 21 (product flow 80), conveyed in the direction of rotation R, and released again at a defined circumferential position, here for example at 6 o'clock (product flow 81), in particular to the downstream stacking device 30. The conveyor device 20 holds the flat elements 95 during conveyance, for example by means of a vacuum, and can have receptacles 22 for receiving the flat elements 95. The number of receptacles 22 is three in this case, but can also be more or fewer than three.

[0032] The measuring device 10 is arranged in a measuring relationship to the conveying device 20 and is configured for optical measurement on flat elements 95 conveyed on the conveying device 20. The measuring device 10 comprises at least one optical sensor 11-13, which is arranged with a view onto the outer surface of the rotary conveyor 21, i.e. onto an object plane of the composite elements 90. The measuring device 10 advantageously comprises a camera 11 looking onto the outer surface of the rotary conveyor 21 and / or at least one optical contrast sensor 12, 13. The at least one optical sensor 11-13 is configured to detect at least one offset of a flat element 95 on the conveying device 20. Offset is understood to mean the deviation of a measured position or orientation from a target position or target orientation.The corresponding signal and data processing and evaluation of the measurement signal from the measuring device takes place in an electronic control and evaluation unit 40, which is shown schematically in Figure 2. The electronic control and evaluation unit 40 can be implemented in particular in a machine control system or in a separate data processing unit.

[0033] The measuring device 10 is advantageously configured to determine an offset AR of a planar element 95 along the conveying direction F of the conveying device 20, here along the rotational direction R of the rotary conveyor 21. The measuring device 10 is advantageously configured to determine an offset AS of a planar element 95 transverse to the conveying direction F of the conveying device 20, here transverse to the rotational direction R of the rotary conveyor 21. The measuring device 10 is advantageously configured to determine a rotation of a planar element 95 by an angle <p um eine Achse senkrecht zu einer Förderebene, hier um eine radiale Achse des Rotationsförderers, zu bestimmen.

[0034] With a camera 11, the deviation AR, AS and / or the angular offset <p einfach mittels Bildverarbeitung in der elektronischen Steuer- und Auswerteeinheit 40 ermittelt werden.

[0035] In the embodiment according to Figure 3, the rotary conveyor 21 is designed as a so-called accelerator drum. This means that the rotary conveyor 21 does not rotate at a constant rotational speed, but is periodically decelerated and accelerated again. In particular, the rotary conveyor 21 can preferably come to a standstill at the delivery position of the flat elements 95, here at 6 o'clock, in order to deliver the flat elements 95 to the stacking station 50 with precise positioning. In such an embodiment, the control / evaluation unit 40 advantageously synchronizes the camera 11, or an imaging optical sensor of the measuring device 10, such that the image is taken at the time the rotary conveyor 21 is at a standstill.The angular distance between the camera 11 and the delivery position (here 6 o'clock) advantageously corresponds to the angular distance between two images 22, so that when the rotary conveyor 21 is at a standstill, a flat element 95 is positioned in the field of view of the camera 11. Taking an image during the rotation of the rotary conveyor 21 is possible.

[0036] Using at least one optical contrast sensor 12, 13, the deviation AR can first be determined as follows. The at least one optical contrast sensor 12, 13 is configured to determine an optical transition generated by a transverse edge 51, 52 of a planar element 95 conveyed past the optical contrast sensor 12, 13. A transverse edge 51, 52 is an edge of the planar element 95 running transversely to the conveying or rotation direction, in particular a leading edge 51 and / or a trailing edge 52. An optical transition is a light-dark transition or a color transition. When detecting an optical transition through a transverse edge 51, 52 of a flat element 95 being conveyed past, the optical contrast sensor 12, 13 generates a sharp signal edge which represents the exact position of the transverse edge 51, 52, and thus of the flat element 95, along the conveying or rotation direction.In this way, an offset AR (symbolized by arrows) of the planar elements 95 in the circumferential direction of the rotary conveyor 21 can be determined and advantageously compensated for by controlling the rotary conveyor 21 (this will be explained in more detail below). The optical contrast sensor 12, 13 can, for example, be a fast-switching contrast light sensor. In the case of a plurality of optical contrast sensors 12, 13 arranged transversely to the conveying or rotation direction, the mean value of the position of the optical transition can, for example, be determined as the actual value of the transverse edge 51, 52.

[0037] Preferably, a plurality of optical contrast sensors 12, 13 are provided at the same position in the conveying direction, which are spaced apart by a distance D in the transverse direction, see Figures 4 and 5. With a plurality of spaced-apart optical contrast sensors 12, 13 at the same position in the conveying direction, the angular orientation and thus an undesired rotation of the planar elements 95 about an axis perpendicular to the conveying plane, for example, about a radial axis of the rotary conveyor 21, can be determined in the control and evaluation unit 40. This is explained below with reference to Figure 5.

[0038] In this example, the optical sensor 13 detects the front edge 51 of the flat element 95 first and the optical sensor 12 detects the front edge 51 of the flat element 95 thereafter with a time delay Δt. From the known conveying speed v or the machine cycle, the offset a in the conveying direction results in a=v Δt. The angular offset <p ergibt sich aufgrund einer trigonometrischen Auswertung des Verhältnisses von a zu D: tan(rp) = a / D. Durch Arcustangens-Bildung wird der Winkelversatz <p wie folgt erhalten: <p = arctan(a / D). Die optischen Sensoren 12, 13 sind also vorteilhaft Kontrastlichttaster, die das Vorbeibewegen eines flächigen Elements 95 erfassen. Je nach Auslösemuster kann erkannt werden, ob das flächige Element 95 exakt parallel geführt wird (beide Lichttaster 12, 13 lösen gleichzeitig aus) oder ob das flächige Element 95 einen Winkelfehler (p aufweist.The absolute time relative to the absolute position of the conveyor drive allows the position and offset AR along the conveying direction to be determined. By applying a corresponding offset during delivery to the stacking device 30, a detected error can be corrected and the storage position adjusted.

[0039] The lateral offset AS cannot be determined with the optical contrast sensors 12, 13. To determine the lateral offset AS, the measuring device 10 can have additional optical sensors 14, 15 (see Figure 4) arranged laterally to the planar elements 95. The optical sensors 14, 15 can, for example, be reflection sensors with light lines that can determine how far the planar elements 95 are offset transversely to the conveying direction F by measuring the amount of light. The optical sensors 14, 15 can be distance sensors that are designed to measure the lateral distance, and thus the transverse offset, of the planar elements 95. Alternatively, point- or line-measuring laser scanners that operate with triangulation or time-of-flight measurement (lidar) can be used. Depending on the embodiment, it may be sufficient to provide such a distance sensor 14 or 15 on only one side of the conveying device 20.

[0040] A transverse offset can thus be detected by the optical sensors 14, 15. A reflection principle with light lines can be used here, which can determine how far the flat element is laterally offset from the central axis by measuring the amount of light. Analogous to the previously described compensation of the longitudinal offset, the transverse offset can be corrected using suitable actuators. An angular error can also be corrected in the same way by adding a rotating or at least tilting movement component.

[0041] Optionally, at least one additional optical sensor 16 is provided for determining the position of a contact tab 96 of the electrodes 92, 94 in the conveying direction. The distance of the optical sensor 16 from the sensors 12, 13 in the conveying direction is advantageously smaller than the extension of a flat element 95 in the conveying direction and can approximately correspond to the distance of the transverse edge 51 from the front edge of the contact tab 96. A time difference indicates an offset of the contact tab 96 from the edge 70 of the flat elements 95 in the conveying direction.

[0042] The additional optical sensor 16 enables the determination of the position of the respective contact tab 96 relative to a transverse edge 51, 52 of the corresponding planar element 95. This information is useful because the position of the contact tab 96 relative to the base body of the corresponding electrode 92, 94 can vary. For example, the measurement signals of the sensors 12, 13 can be compensated with this information so that the sensors 12, 13 do not falsely indicate an offset of the electrodes 92, 94 that is actually based on an offset of a contact tab 96 relative to the base body of the corresponding electrode 92, 94. The additional optical sensor 16 generally represents optional additional features of the planar element that can also be detected if necessary, such as a conductor lug or contact tab 96.If the control / evaluation unit 40 detects an offset AR, an offset AS and / or an angle error <p eines flächigen Elements 95 detektiert, kann die Steuer- / Auswerteeinheit 40 geeignete Maßnahmen automatisch veranlassen. Dies wird im Folgenden genauer erläutert.

[0043] If the control / evaluation unit 40 detects an offset AR of a planar element 95 along the conveying direction F or the rotation direction R, this can advantageously be compensated for by controlling a position-controlled drive for the rotary conveyor 21 by varying the delivery position for the planar elements 95 and selecting it accordingly. If 12 o'clock is 0°, 6 o'clock is 180°, and 9 o'clock is 90°, the delivery position does not have to be exactly 180° in every case, but can vary slightly by a few tenths of a degree around 180°. If, for example, a planar element 95 leads in the conveying direction, the delivery position in Figure 2 would be slightly smaller than 180°. If, for example, a planar element 95 lags in the conveying direction, the delivery position in Figure 2 would be slightly larger than 180°. In this way, a precise positioning on the stack in the stacking station 50 without offset AR along the conveying direction can be ensured.

[0044] In the embodiment described above, the stop position of the rotary conveyor 21 for transferring the flat element 95 to the stacking device 30 is therefore selected such that the deviation AR in the transport or conveying direction F is corrected.

[0045] In the embodiment according to Figure 6, a rotation body 25 of the rotary conveyor 21, more generally a rotating part 26 of the conveyor device 20, is displaceable as a whole along a transverse axis 23, for example the axis of rotation of the rotary conveyor 21 (which is indicated by a double arrow), in order to compensate for an offset AS of a planar element 95 in the transverse direction, and / or pivotable about a pivot axis 24 perpendicular to the conveying plane in order to compensate for an angular offset <p eines flächigen Elements 95 zu kompensieren. Die Fördervorrichtung 20 oder der Rotationsförderer 21 weist zu diesem Zweck eine nicht gezeigte Verschiebe- und / oder Schwenkmechanik auf, die durch die Steuer- / Auswerteeinheit 40 entsprechend angesteuert wird, um eine Verschiebung und / oder Verschwenkung zu bewirken.

[0046] In this embodiment, the rotating body 25, here the accelerator drum, can be axially displaced as a whole. Furthermore, the rotating body 25 can be rotated about a radial axis to correct angular errors.

[0047] In the embodiment according to Figure 7, only the receptacles 22 of the conveyor device 20 are displaceable relative to a, for example, drum-shaped base body 27 of the conveyor device 20 along a transverse axis and / or along the conveying direction in order to compensate for an offset AS and / or AR of a planar element 95 along the transverse direction and / or along the conveying direction, and / or pivotable about a pivot axis 24 perpendicular to the conveying plane, for example about a radial axis of the rotary conveyor 21, in order to compensate for an angular offset <p eines flächigen Elements 95 zu kompensieren. Die Fördervorrichtung 20 oder der Rotationsförderer 21 weist zu diesem Zweck eine nicht gezeigte Verschiebe- und / oder Schwenkmechanik auf, die durch die Steuer- / Auswerte- einheit 40 entsprechend angesteuert wird, um eine Verschiebung und / oder Verschwenkung der jeweiligen Aufnahme 22 zu bewirken.

[0048] In this embodiment, the receptacle 22 of the conveying device 20 is therefore movably mounted and can be displaced in the conveying direction and / or in the transverse direction, and / or rotated in order to correct angular errors.

[0049] The stacking device 30 has an element holder 31, onto which the flat elements 95 delivered by the conveyor device 20 are placed one on top of the other to form a segment stack and thus stacked. In the embodiment according to Figure 8, the element holder 31 of the stacking device 30 is displaceable along a transverse axis and / or along the conveying direction in order to compensate for an offset AS and / or AR of a flat element 95 lying thereon along the transverse direction and / or along the conveying direction, and / or pivotable about an axis perpendicular to the conveying plane, for example a vertical axis of the rotary conveyor 21, in order to compensate for an angular offset <p eines darauf liegenden flächigen Elements 95 zu kompensieren.For this purpose, the stacking device 30 has a displacement and / or pivoting mechanism (not shown), which is controlled accordingly by the control / evaluation unit 40 to effect a displacement and / or pivoting of the element holder 31. The element holder 31 can also be used to hold individual flat elements 31; the stacking process can then take place in a downstream stacking device.

[0050] In this embodiment, element holder 31, which can also be referred to as a stack support, is movable and / or rotatable in the plane. To prevent the individual flat elements of the stack from slipping against each other, they are preferably held or clamped with retaining elements.

[0051] The previously described methods for position and / or angle correction can be used either individually or in any combination, depending on the position and / or angle errors present.

[0052] In another embodiment, an incorrectly positioned flat element 95 can be automatically removed from the product stream. A warning display on an operator terminal is also possible additionally or alternatively.

[0053] List of reference symbols

[0054] 10 Measuring device

[0055] 11 Imaging measuring device

[0056] 12, 13 Optical contrast sensors

[0057] 14-16 Optical Sensors

[0058] 20 Conveyor device

[0059] 21 rotary conveyors

[0060] 22 recording

[0061] 23 Transverse axis

[0062] 24 swivel axis

[0063] 25 rotation bodies

[0064] 26 funding

[0065] 27 basic bodies

[0066] 30 stacking device

[0067] 31 Element recording

[0068] 40 Control / evaluation unit

[0069] 50 stacking stations

[0070] 51 , 52 transverse edges

[0071] 80, 81 Product flows

[0072] 90 Electrode-separator composite unit

[0073] 91 Separator sheet

[0074] 92 Anode

[0075] 93 Separator sheet

[0076] 94 Cathode

[0077] 95 flat element

[0078] 96 contact tab

Claims

Claims:

1. Stacking station (50) for the battery cell manufacturing industry, comprising a conveying device (20) for conveying planar elements (95), and a stacking device (30) downstream of the conveying device (20) for forming a segment stack from conveyed planar elements (95), characterized in that the stacking station (50) has an optical measuring device (10) which is arranged in a measuring relationship to the conveying device (20) and is set up to detect a positional deviation AR, AS and / or an angular offset (p) of a planar element (95) conveyed on the conveying device (20).

2. Stacking station according to claim 1, characterized in that the conveying device (20) and / or the stacking device (30) is set up to carry out a position and / or angle correction of a planar element (95) on the basis of a measuring signal output by the measuring device (10).

3. Stacking station according to claim 2, characterized in that a correction of a positional deviation AR of a planar element (95) along the conveying direction F, R is carried out by controlled adjustment of the discharge position of the planar element (95) from the conveying device (20).

4. Stacking station according to claim 3, characterized in that the controlled adjustment of the discharge position of the planar element (95) from the conveying device (20) is carried out by means of a po- The conveying device (20) is driven by a location-controlled drive.

5. Stacking station according to one of claims 2 to 4, characterized in that, in order to carry out a position and / or angle correction of a planar element (95), a receiving (22) of the conveying device (20) for receiving a planar element (95) is adjustable and / or rotatable relative to a base body (27) of the conveying device (20).

6. Stacking station according to one of claims 2 to 5, characterized in that, in order to carry out a position and / or angle correction, a rotating part (26) of the conveying device (20) is adjustable and / or rotatable as a whole.

7. Stacking station according to one of claims 2 to 6, characterized in that at least one element holder (31) of the stacking device (30) is adjustable and / or rotatable in order to carry out a position and / or angle correction.

8. Stacking station according to one of the preceding claims, characterized in that the optical measuring device (10) comprises an imaging measuring device (11), in particular a camera.

9. Stacking station according to claim 8, characterized in that the imaging measuring device (10) is configured for taking images during standstill phases of the conveying device (20).

10. Stacking station according to one of the preceding claims, characterized in that the optical measuring device (10) includes at least one optical contrast sensor (12, 13) Stacking station according to one of the preceding claims, characterized in that the optical measuring device (10) has a plurality of optical contrast sensors (12, 13) arranged transversely to a conveying direction of the conveying device (20). Stacking station according to one of the preceding claims, characterized in that the optical measuring device (10) has at least one laterally arranged optical sensor (14, 15) configured to detect a deviation AS of the position of a planar element (95) conveyed on the conveying device (20) from a target position in a transverse direction. Stacking station according to one of the preceding claims, characterized in that the conveying device (20) is located directly upstream of the stacking device (30). Stacking station according to one of the preceding claims, characterized in that the conveying device (20) is a rotary conveyor (21).Stacking method for the battery cell manufacturing industry, comprising conveying planar elements (95) by means of a conveying device (20), and forming a segment stack from conveyed planar elements (95) by means of a stacking device (30) downstream of the conveying device (20), characterized by an optical measurement by means of an optical measuring device (10) which is in a measuring relationship to. the conveying device (20) is arranged, and detection of a positional deviation AR, AS and / or an angular offset <p eines auf der Fördervorrichtung (20) geförderten flächigen Elements (95) mittels der optischen Messung.

Images